Pub Date : 2025-09-02DOI: 10.1016/j.bgtech.2024.100142
Ali Maroof
The antlions dig a conical simple pit in sand to catch ants. The funnel shape of the trap is deliberate with a critical angle of repose and is steep and shallow enough to trigger avalanches and cause struggling prey to fall into the funnel. The trap should be designed by optimizing pit morphology according to natural selection. In the current study, antlion behavior and pit morphology in the sand samples with different particle shapes and particle size distributions were studied. The small larvae build in fine sand and silty sand, while larger ones prefer fine to medium sands. However, there is no preference for sands with different particle shapes. Further, the static and dynamic angles of repose for the sand samples were measured, and the slope of the pits was compared with the repose angles. The angle of the heap slope oscillated between an upper angle or angle of sliding (the angle that triggers a landslide) and a lower angle named repose angle.
{"title":"Antlion sand interaction: A study of repose angle","authors":"Ali Maroof","doi":"10.1016/j.bgtech.2024.100142","DOIUrl":"10.1016/j.bgtech.2024.100142","url":null,"abstract":"<div><div>The antlions dig a conical simple pit in sand to catch ants. The funnel shape of the trap is deliberate with a critical angle of repose and is steep and shallow enough to trigger avalanches and cause struggling prey to fall into the funnel. The trap should be designed by optimizing pit morphology according to natural selection. In the current study, antlion behavior and pit morphology in the sand samples with different particle shapes and particle size distributions were studied. The small larvae build in fine sand and silty sand, while larger ones prefer fine to medium sands. However, there is no preference for sands with different particle shapes. Further, the static and dynamic angles of repose for the sand samples were measured, and the slope of the pits was compared with the repose angles. The angle of the heap slope oscillated between an upper angle or angle of sliding (the angle that triggers a landslide) and a lower angle named repose angle.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 4","pages":"Article 100142"},"PeriodicalIF":0.0,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145229890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-06-09DOI: 10.1016/j.bgtech.2025.100187
Md Kausar Alam, Ramin Motamed
Microbially Induced Calcite Precipitation (MICP) is an effective ground improvement technique for mitigating liquefaction-induced ground deformations. However, limited research has explored its application for reducing shallow foundation settlement in liquefiable soils. Understanding the extent of the area requiring MICP treatment beneath a foundation is critical to minimizing settlement. This study aims to evaluate the impact of the improvement area of MICP-treated blocks on mitigating liquefaction-induced settlements of shallow foundations using a series of 1 g shake table model tests. The dimensions of the treated blocks were determined based on the Boussinesq load distribution chart and treated to achieve a shear wave velocity of 250 m/s. Scaled shake table tests were conducted, modeled after a large-scale shake table experiment. The testing setup included three soil layers with different relative densities, with a shallow foundation placed on the surface crust. MICP-treated blocks of varying sizes were placed beneath the foundation. The results demonstrated that when the MICP-treated block was configured as either L×B× 1.25B or 1.5L× 1.5B×B - where L and B are the length and width of the foundation - resulted in substantial improvements, with reductions of 80% in foundation settlement and 98 % in foundation tilting. Notably, the L×B× 1.25B configuration achieved performance similar to the 1.5L× 1.5B×B, while reducing the treated volume by 44%. Furthermore, the results emphasize the importance of optimizing the MICP-treated area to effectively mitigate liquefaction, providing valuable insights into the practical application of MICP for improving the performance of shallow foundations in liquefiable soils.
{"title":"Role of MICP treatment area in mitigating liquefaction-induced settlements for shallow foundation","authors":"Md Kausar Alam, Ramin Motamed","doi":"10.1016/j.bgtech.2025.100187","DOIUrl":"10.1016/j.bgtech.2025.100187","url":null,"abstract":"<div><div>Microbially Induced Calcite Precipitation (MICP) is an effective ground improvement technique for mitigating liquefaction-induced ground deformations. However, limited research has explored its application for reducing shallow foundation settlement in liquefiable soils. Understanding the extent of the area requiring MICP treatment beneath a foundation is critical to minimizing settlement. This study aims to evaluate the impact of the improvement area of MICP-treated blocks on mitigating liquefaction-induced settlements of shallow foundations using a series of 1 <em>g</em> shake table model tests. The dimensions of the treated blocks were determined based on the Boussinesq load distribution chart and treated to achieve a shear wave velocity of 250 m/s. Scaled shake table tests were conducted, modeled after a large-scale shake table experiment. The testing setup included three soil layers with different relative densities, with a shallow foundation placed on the surface crust. MICP-treated blocks of varying sizes were placed beneath the foundation. The results demonstrated that when the MICP-treated block was configured as either <em>L×B× </em>1.25<em>B</em> or <em>1.5L× 1.5B×B</em> - where <em>L</em> and <em>B</em> are the length and width of the foundation - resulted in substantial improvements, with reductions of 80% in foundation settlement and 98 % in foundation tilting. Notably, the <em>L×B× 1.25B</em> configuration achieved performance similar to the <em>1.5L× 1.5B×B</em>, while reducing the treated volume by 44%. Furthermore, the results emphasize the importance of optimizing the MICP-treated area to effectively mitigate liquefaction, providing valuable insights into the practical application of MICP for improving the performance of shallow foundations in liquefiable soils.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"4 1","pages":"Article 100187"},"PeriodicalIF":0.0,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145765805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-19DOI: 10.1016/j.bgtech.2025.100177
{"title":"Erratum regarding updating Declaration of Competing Interest statements in previously published articles","authors":"","doi":"10.1016/j.bgtech.2025.100177","DOIUrl":"10.1016/j.bgtech.2025.100177","url":null,"abstract":"","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 2","pages":"Article 100177"},"PeriodicalIF":0.0,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-22DOI: 10.1016/j.bgtech.2025.100167
Dashuang Wang , Tuo Ping , Zhilan Du , Tingye Liu , Yuxin Zhang
Recent advances in bionic optical materials (BOMs) are systematically reviewed, emphasizing bioinspired strategies derived from natural models such as plant epidermis, aquatic organisms, avian plumage, and insect photonic architectures (e.g., butterfly wings and inverse opal structures). These biological systems exhibit sophisticated light manipulation mechanisms, including absorption, scattering, and structural coloration, which have guided the design of novel extinction materials with tunable optical properties. By mimicking hierarchical structures and dynamic light-regulation principles, researchers have developed BOMs exhibiting exceptional broadband extinction performance. Notably, applications in optical sensing and imaging systems are critically discussed, highlighting their role in enhancing camera sensitivity and adaptive optical sensor design. Furthermore, this review identifies emerging trends in nanofabrication, machine learning-assisted optimization, and biohybrid material systems. The integration of cross-disciplinary approaches is projected to accelerate the development of multifunctional BOMs, paving the way for breakthroughs in adaptive optics, environmental monitoring, and intelligent photonic devices. In the future, the integration of BOMs and distributed fiber optic sensing technology is expected to realize the whole-life optical monitoring of pile foundation structural health, and promote the development of geotechnical engineering in the direction of intelligence and high precision.
{"title":"Progress and prospect of biomimetic optical materials: A review","authors":"Dashuang Wang , Tuo Ping , Zhilan Du , Tingye Liu , Yuxin Zhang","doi":"10.1016/j.bgtech.2025.100167","DOIUrl":"10.1016/j.bgtech.2025.100167","url":null,"abstract":"<div><div>Recent advances in bionic optical materials (BOMs) are systematically reviewed, emphasizing bioinspired strategies derived from natural models such as plant epidermis, aquatic organisms, avian plumage, and insect photonic architectures (e.g., butterfly wings and inverse opal structures). These biological systems exhibit sophisticated light manipulation mechanisms, including absorption, scattering, and structural coloration, which have guided the design of novel extinction materials with tunable optical properties. By mimicking hierarchical structures and dynamic light-regulation principles, researchers have developed BOMs exhibiting exceptional broadband extinction performance. Notably, applications in optical sensing and imaging systems are critically discussed, highlighting their role in enhancing camera sensitivity and adaptive optical sensor design. Furthermore, this review identifies emerging trends in nanofabrication, machine learning-assisted optimization, and biohybrid material systems. The integration of cross-disciplinary approaches is projected to accelerate the development of multifunctional BOMs, paving the way for breakthroughs in adaptive optics, environmental monitoring, and intelligent photonic devices. In the future, the integration of BOMs and distributed fiber optic sensing technology is expected to realize the whole-life optical monitoring of pile foundation structural health, and promote the development of geotechnical engineering in the direction of intelligence and high precision.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 3","pages":"Article 100167"},"PeriodicalIF":0.0,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144557689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-26DOI: 10.1016/j.bgtech.2025.100164
Yaoting Duan , Qin Yuan , Caiqi Yu , Chunli Zheng
One of the major challenges in the application of microbially induced carbonate precipitation (MICP) is achieving "bacteria freedom", as it necessitates a substantial volume of bacterial solutions. Nevertheless, both in-situ bacterial cultivation and transportation of bacterial solutions have proven to be inefficient. In this study, we suggested the utilization of bacteria in the form of dry powder, enabling easy on-site activation and achieving a relatively high urease activity. We conducted MICP curing experiments on gold mine tailings (GMT) using steel slag (SS) as an additive. The results showed that the average unconfined compressive strength (UCS) values of the tailings treated with MICP and MICP+SS reached 0.51 and 0.71 MPa, respectively. In addition, the average leaching reduction rates of Cu, Pb, Cr, Zn, and T-CN in GMT after MICP treatment reached 98.54%, 100%, 70.94%, 59.25%, and 98.02%, respectively, and the average reduction rates after MICP+SS treatment reached 98.77%, 100%, 88.03%, 72.59%, and 98.63%, respectively. SEM, XRD, FT-IR analyses, and ultra-deep field microscopy results confirmed that the MICP treatment produced calcite-based calcium carbonate that filled the inter-tailing pores and cemented them together, and the hydration mechanism was the main reason for the increased curing efficiency of SS. Our research findings demonstrate that bacterial powder can efficiently achieve the objectives of heavy metal removal and tailing solidification. This approach can substantially decrease the expenses associated with bacterial cultivation and solution transportation, thereby playing a crucial role in advancing the practical implementation of MICP.
{"title":"A large-scale study on solidification of gold tailings based on microbially induced carbonate precipitation (MICP)","authors":"Yaoting Duan , Qin Yuan , Caiqi Yu , Chunli Zheng","doi":"10.1016/j.bgtech.2025.100164","DOIUrl":"10.1016/j.bgtech.2025.100164","url":null,"abstract":"<div><div>One of the major challenges in the application of microbially induced carbonate precipitation (MICP) is achieving \"bacteria freedom\", as it necessitates a substantial volume of bacterial solutions. Nevertheless, both in-situ bacterial cultivation and transportation of bacterial solutions have proven to be inefficient. In this study, we suggested the utilization of bacteria in the form of dry powder, enabling easy on-site activation and achieving a relatively high urease activity. We conducted MICP curing experiments on gold mine tailings (GMT) using steel slag (SS) as an additive. The results showed that the average unconfined compressive strength (UCS) values of the tailings treated with MICP and MICP+SS reached 0.51 and 0.71 MPa, respectively. In addition, the average leaching reduction rates of Cu, Pb, Cr, Zn, and T-CN in GMT after MICP treatment reached 98.54%, 100%, 70.94%, 59.25%, and 98.02%, respectively, and the average reduction rates after MICP+SS treatment reached 98.77%, 100%, 88.03%, 72.59%, and 98.63%, respectively. SEM, XRD, FT-IR analyses, and ultra-deep field microscopy results confirmed that the MICP treatment produced calcite-based calcium carbonate that filled the inter-tailing pores and cemented them together, and the hydration mechanism was the main reason for the increased curing efficiency of SS. Our research findings demonstrate that bacterial powder can efficiently achieve the objectives of heavy metal removal and tailing solidification. This approach can substantially decrease the expenses associated with bacterial cultivation and solution transportation, thereby playing a crucial role in advancing the practical implementation of MICP.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 3","pages":"Article 100164"},"PeriodicalIF":0.0,"publicationDate":"2025-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144557688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-21DOI: 10.1016/j.bgtech.2025.100163
Bo Kang , Hao Wang , Fusheng Zha , Congmin Liu , Annan Zhou , Rulong Ban
Microbial induced calcium carbonate precipitation (MICP) technology is widely used for reinforcement in geotechnical engineering due to its low cost, simple process, strong applicability and lack of secondary pollution. However, the presence of clay particles in silt increases the compressibility and decreases the permeability of soil, complicating the even distribution of slurry into soil pores. Therefore, it is necessary to develop a treatment technology which is suitable for silty soil sites, achieving effective solidification using MICP. This study examines three treatment techniques, including grouting, immersing and mixing methods, to solidify silt material. The strength characteristics of the solidified soil were analyzed by using unconfined compression tests. Results show that the mixing method provides the highest strength, followed by the grouting method, with the immersion method yielding the lowest strength. The uniformity of the solidified samples was assessed by determining calcium carbonate content, X-ray diffraction tests, and mercury injection tests. The MICP samples made by using immersing and grouting methods exhibited inhomogeneity in both radial and longitudinal directions. For the immersing method, calcium carbonate content decreased, pore volume increased, and the degree of cementation worsened progressively from the outer layer to the inner layer. For grouting method, the same phenomenon occurs from the bottom (grouting point) to the top. In contrast, the MICP samples with mixing method showed good homogeneity in all spatial directions. This study provides guidance and optimization strategies for applying MICP technology in silty soil sites.
{"title":"Exploring the uniformity of MICP solidified fine particle silt with different sample preparation methods","authors":"Bo Kang , Hao Wang , Fusheng Zha , Congmin Liu , Annan Zhou , Rulong Ban","doi":"10.1016/j.bgtech.2025.100163","DOIUrl":"10.1016/j.bgtech.2025.100163","url":null,"abstract":"<div><div>Microbial induced calcium carbonate precipitation (MICP) technology is widely used for reinforcement in geotechnical engineering due to its low cost, simple process, strong applicability and lack of secondary pollution. However, the presence of clay particles in silt increases the compressibility and decreases the permeability of soil, complicating the even distribution of slurry into soil pores. Therefore, it is necessary to develop a treatment technology which is suitable for silty soil sites, achieving effective solidification using MICP. This study examines three treatment techniques, including grouting, immersing and mixing methods, to solidify silt material. The strength characteristics of the solidified soil were analyzed by using unconfined compression tests. Results show that the mixing method provides the highest strength, followed by the grouting method, with the immersion method yielding the lowest strength. The uniformity of the solidified samples was assessed by determining calcium carbonate content, X-ray diffraction tests, and mercury injection tests. The MICP samples made by using immersing and grouting methods exhibited inhomogeneity in both radial and longitudinal directions. For the immersing method, calcium carbonate content decreased, pore volume increased, and the degree of cementation worsened progressively from the outer layer to the inner layer. For grouting method, the same phenomenon occurs from the bottom (grouting point) to the top. In contrast, the MICP samples with mixing method showed good homogeneity in all spatial directions. This study provides guidance and optimization strategies for applying MICP technology in silty soil sites.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"4 1","pages":"Article 100163"},"PeriodicalIF":0.0,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145765801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-16DOI: 10.1016/j.bgtech.2025.100162
Dong Liu , Yuxin Zhang
In this study, we demonstrate that diatoms, through their bioweathering process, can enhance the properties of lunar soil, thereby facilitating the cultivation of crops. Detailedly, diatoms can deconstruct lunar soil minerals to polish the sharp edge of the minerals and release nutrients, and aggregate lunar soil particles for water retention. In addition, diatoms possess a high degree of resilience to space conditions, with the capacity to consume carbon dioxide and release oxygen. Furthermore, they have been observed to utilize human waste as a source of sustenance, thus rendering them a promising candidate for the in situ modification of lunar soil. This study offers valuable insights into the potential for diatoms to contribute to future space habitation and exploration.
{"title":"Diatom-driven activation of in-situ lunar resource utilization for space farming","authors":"Dong Liu , Yuxin Zhang","doi":"10.1016/j.bgtech.2025.100162","DOIUrl":"10.1016/j.bgtech.2025.100162","url":null,"abstract":"<div><div>In this study, we demonstrate that diatoms, through their bioweathering process, can enhance the properties of lunar soil, thereby facilitating the cultivation of crops. Detailedly, diatoms can deconstruct lunar soil minerals to polish the sharp edge of the minerals and release nutrients, and aggregate lunar soil particles for water retention. In addition, diatoms possess a high degree of resilience to space conditions, with the capacity to consume carbon dioxide and release oxygen. Furthermore, they have been observed to utilize human waste as a source of sustenance, thus rendering them a promising candidate for the in situ modification of lunar soil. This study offers valuable insights into the potential for diatoms to contribute to future space habitation and exploration.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 4","pages":"Article 100162"},"PeriodicalIF":0.0,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Although biochar is widely recognized for enhancing various soil properties, its impact on soil erosion resistance remains unclear and sometimes shows contradictory results. The main objective of this study is to quantify the effects of corn-cob biochar amendment, both with and without erosion control blankets (ECB), as well as the influence of biochar/compost incubation time on erosion resistance of a silty sand. The study also investigates the effects of biochar on Atterberg limits, shear strength, and thermal conductivity. As biochar content increases from 0 % to 20 %, the liquid limit (LL), plastic limit (PL), and shrinkage limit (SL) rise by 8 %–10 %, suggesting that biochar-amended soil (BAS) retains more water without losing strength. The addition of biochar has minimal impact on the shear strength of BAS at lower normal stresses (<45 kPa) but reduces its thermal conductivity by about 70 %. Submerged jet erosion tests show that biochar alone increases soil erosion in BAS. However, when combined with ECB and vegetation, erosion is significantly reduced (up to 39 %). Overall, this study underscores the importance of utilizing biochar in combination with ECB and such vegetation as ruzi grass to mitigate soil erosion in the silty sand.
{"title":"Increased erosion in biochar-amended soil: importance of integrating erosion control blankets and vegetation","authors":"Monir Hossain , Apiniti Jotisankasa , Surachet Aramrak , Viroon Kamchoom , Satoshi Nishimura , Supakij Nontananandh , Tananop Muanlhao , Surat Semmad","doi":"10.1016/j.bgtech.2025.100161","DOIUrl":"10.1016/j.bgtech.2025.100161","url":null,"abstract":"<div><div>Although biochar is widely recognized for enhancing various soil properties, its impact on soil erosion resistance remains unclear and sometimes shows contradictory results. The main objective of this study is to quantify the effects of corn-cob biochar amendment, both with and without erosion control blankets (ECB), as well as the influence of biochar/compost incubation time on erosion resistance of a silty sand. The study also investigates the effects of biochar on Atterberg limits, shear strength, and thermal conductivity. As biochar content increases from 0 % to 20 %, the liquid limit (LL), plastic limit (PL), and shrinkage limit (SL) rise by 8 %–10 %, suggesting that biochar-amended soil (BAS) retains more water without losing strength. The addition of biochar has minimal impact on the shear strength of BAS at lower normal stresses (<45 kPa) but reduces its thermal conductivity by about 70 %. Submerged jet erosion tests show that biochar alone increases soil erosion in BAS. However, when combined with ECB and vegetation, erosion is significantly reduced (up to 39 %). Overall, this study underscores the importance of utilizing biochar in combination with ECB and such vegetation as ruzi grass to mitigate soil erosion in the silty sand.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"4 1","pages":"Article 100161"},"PeriodicalIF":0.0,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145765802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-20DOI: 10.1016/j.bgtech.2024.100158
Charles Wang Wai Ng , Qi Zhang , Haowen Guo , Junjun Ni , Yuchen Wang , Anthony Kwan Leung , Chao Zhou
Global climate change has exacerbated extreme weather events, such as intense rainfall and heat waves, resulting in the deterioration of geotechnical earthen structures. To address the urgent need for sustainable development, eco-friendly solutions are being explored, with vegetation emerging as a vital natural engineer. Despite the potential of vegetation, traditional practices often limit its role to aesthetics, overlooking the engineering benefits of plant roots. This paper introduces the new interdisciplinary field of eco-geotechnics, which integrates soil mechanics, ecology, botany, and atmospheric sciences, etc. to enhance geotechnical infrastructure. By focusing on atmosphere–plant–soil interactions, this review highlights how plants contribute to the stability of earthen infrastructure through root reinforcement and hydrological benefits. This paper also reviews recent advancements in constitutive modelling of vegetated soils, particularly focusing on a novel eco-unsaturated soil model. It discusses experimental testing of vegetated soils and their wide applications. Critical research gaps are identified in terms of the effects of extreme weather on root systems, soil cracking dynamics, ecological restoration in contaminated areas, and the synergistic effects of vegetation with sustainable soil stabilisers. Additionally, the use of smart monitoring techniques based on a combination of remote sensing and machine learning is proposed to assess vegetation–soil interactions in real-time. By integrating ecological and geotechnical processes, a comprehensive framework is recommended for future research directions in eco-geotechnics, which will ultimately facilitate the development of resilient engineering solutions that can withstand the challenges posed by climate change. The insights gained will be invaluable for improving the sustainability of geotechnical practices and enhancing the resilience of infrastructures in a changing climate.
{"title":"Eco-geotechnics under climate change: A state-of-the-art review","authors":"Charles Wang Wai Ng , Qi Zhang , Haowen Guo , Junjun Ni , Yuchen Wang , Anthony Kwan Leung , Chao Zhou","doi":"10.1016/j.bgtech.2024.100158","DOIUrl":"10.1016/j.bgtech.2024.100158","url":null,"abstract":"<div><div>Global climate change has exacerbated extreme weather events, such as intense rainfall and heat waves, resulting in the deterioration of geotechnical earthen structures. To address the urgent need for sustainable development, eco-friendly solutions are being explored, with vegetation emerging as a vital natural engineer. Despite the potential of vegetation, traditional practices often limit its role to aesthetics, overlooking the engineering benefits of plant roots. This paper introduces the new interdisciplinary field of eco-geotechnics, which integrates soil mechanics, ecology, botany, and atmospheric sciences, etc. to enhance geotechnical infrastructure. By focusing on atmosphere–plant–soil interactions, this review highlights how plants contribute to the stability of earthen infrastructure through root reinforcement and hydrological benefits. This paper also reviews recent advancements in constitutive modelling of vegetated soils, particularly focusing on a novel eco-unsaturated soil model. It discusses experimental testing of vegetated soils and their wide applications. Critical research gaps are identified in terms of the effects of extreme weather on root systems, soil cracking dynamics, ecological restoration in contaminated areas, and the synergistic effects of vegetation with sustainable soil stabilisers. Additionally, the use of smart monitoring techniques based on a combination of remote sensing and machine learning is proposed to assess vegetation–soil interactions in real-time. By integrating ecological and geotechnical processes, a comprehensive framework is recommended for future research directions in eco-geotechnics, which will ultimately facilitate the development of resilient engineering solutions that can withstand the challenges posed by climate change. The insights gained will be invaluable for improving the sustainability of geotechnical practices and enhancing the resilience of infrastructures in a changing climate.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"4 1","pages":"Article 100158"},"PeriodicalIF":0.0,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145765804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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