Tunnelling and Underground Space Technology最新文献_第8页

Short-term metro passenger flow prediction based on hybrid spatiotemporal extraction and multi-feature fusion

IF 6.7 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2025-02-20 DOI: 10.1016/j.tust.2025.106491

Tao Wang , Jianjun Song , Jing Zhang , Junfang Tian , Jianjun Wu , Jianfeng Zheng

Accurate short-term passenger flow prediction in metro systems is essential for effective metro operation planning and passenger guidance. However, existing studies take OD information as reference of topological connection relationship, and neglect the real-time distribution trend of passenger flow. This oversight limits their ability to account for the impact of emergencies on passenger flow. Additionally, previous research has insufficiently addressed the bidirectional flow nature of passenger flow, leading to an incomplete capture of its features. To address these gaps, we propose a Hybrid Spatiotemporal Extraction and Multi-Feature Fusion (HSTE_MFF) model that considers both the bidirectional flow characteristics of metro passengers and real-time distribution trends. First, stations are treated as time units within a bidirectional long short-term memory (Bi-LSTM) neural network to aggregate passenger flow information. Then, a hybrid network framework, comprising Bi-LSTM, an improved residual structure (ResGAC), and LSTM, is designed to extract spatiotemporal features of passenger flow. Additionally, a multi-feature fusion algorithm is introduced to leverage the implicit passenger flow distribution characteristics found in OD data. Unlike previous algorithms, our approach uses historical inflow and outflow data to assess station passenger flow levels and employs the distribution trend of passenger flow at the origin as a weight for predicting future outbound passenger flow destinations. An empirical test using real data from the Qingdao metro system validated the model’s effectiveness. Comparative analysis with various baseline models demonstrated that the HSTE_MFF model significantly reduces prediction errors across different time intervals. Furthermore, a portability test with data from the Hangzhou metro system confirmed the model’s effectiveness in metro networks with different structural characteristics.

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引用次数: 0

Mechanical response of pile group and stratum induced by shallow tunneling based on the model test

IF 6.7 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2025-02-20 DOI: 10.1016/j.tust.2025.106480

Caixia Guo , Hongyu Yue , Yingying Tao , Gang Liu , Fanchao Kong , Dechun Lu , Xiuli Du

Taking a shield tunnel in the Beijing subway system as the background, a three-dimensional model test study is conducted on shield tunneling adjacent to the pile group. In this scaled model test, the geometric similarity ratio is designed as C_L = 1/24. This test reveals the evolution patterns of surface displacement and characteristic deformation of piles during shield tunneling. Two conditions are designed to monitor tunneling adjacent to unilateral and bilateral pile groups. During the tunnel excavation process, surface settlements, pile group displacements, and strains of the pile are observed. The measured results elucidate the stratum deformation patterns observed throughout the shield tunneling process, as well as the deformation characteristics of the existing pile groups in both the circumferential and longitudinal directions. This study compares the effects of existing a pile group versus a greenfield area during tunneling adjacent to a unilateral pile group, taking into account the sheltering effect of the pile group. Finally, the differences in impact from varying pile lengths and pile-tunnel spacings on surface settlements are analyzed, along with the influence of pile length on the vertical and horizontal displacements of the pile group.

{"title":"Mechanical response of pile group and stratum induced by shallow tunneling based on the model test","authors":"Caixia Guo , Hongyu Yue , Yingying Tao , Gang Liu , Fanchao Kong , Dechun Lu , Xiuli Du","doi":"10.1016/j.tust.2025.106480","DOIUrl":"10.1016/j.tust.2025.106480","url":null,"abstract":"<div><div>Taking a shield tunnel in the Beijing subway system as the background, a three-dimensional model test study is conducted on shield tunneling adjacent to the pile group. In this scaled model test, the geometric similarity ratio is designed as <em>C<sub>L</sub></em> = 1/24. This test reveals the evolution patterns of surface displacement and characteristic deformation of piles during shield tunneling. Two conditions are designed to monitor tunneling adjacent to unilateral and bilateral pile groups. During the tunnel excavation process, surface settlements, pile group displacements, and strains of the pile are observed. The measured results elucidate the stratum deformation patterns observed throughout the shield tunneling process, as well as the deformation characteristics of the existing pile groups in both the circumferential and longitudinal directions. This study compares the effects of existing a pile group versus a greenfield area during tunneling adjacent to a unilateral pile group, taking into account the sheltering effect of the pile group. Finally, the differences in impact from varying pile lengths and pile-tunnel spacings on surface settlements are analyzed, along with the influence of pile length on the vertical and horizontal displacements of the pile group.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"159 ","pages":"Article 106480"},"PeriodicalIF":6.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of the sound environment in a metro platform space based on audio-visual interaction experiments

IF 6.7 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2025-02-20 DOI: 10.1016/j.tust.2025.106476

Dongxu Zhang , Xinyi Chen , Xueliu Liu , Hao Chen , Xinyi Zhang , Fei Guo , Yingsheng Zheng

In response to rapid urban development in China, subways have become a key component of urban transportation systems. The audio-visual environment of the most commonly used subway platforms has a significant effect on the emotions and health of the vast population that relies on subway travel. Taking the typical subway station space in Guangzhou as an example, four types of representative sounds and scene images were examined in this study. Audio-visual interaction experiments were conducted in the laboratory to explore the effects of visual and spatial elements in metro platform spaces on evaluations of the acoustic environment. The study found significant differences in the direction and degree of influence of different visual factors on various acoustic evaluations in subway platform spaces. Under acoustic-only condition, background music received the highest scores in the acoustic comfort, preference. However, these scores significantly decreased after platform images were added, while the quietness evaluation for the train arrival and departure sounds, broadcast sounds, and crowd activity sounds improved. In terms of visual factors, the impact of spatial brightness on acoustic evaluations was significantly greater than that of cool and warm colour tones or the spaciousness of the metro platform. An increase in brightness can significantly improve the three acoustic evaluations of broadcast sounds. The influence of colour tones and spaciousness on the evaluation of different sound types varied greatly. When the platform’s scene changes from warm to cool tones, the comfort ratings for train arrival and departure sounds decreases significantly, whereas the quietness evaluations for broadcast sounds improve significantly. When the platform’s spaciousness is reduced, the quietness of crowd activity sounds significantly decreases. The impact of visual factors on the evaluation of the acoustic environment follows the order of quietness > comfort > preference. Among various sounds, visual factors had the most significant impact on the evaluation of broadcast sounds. These results provide a direction for future research in terms of exploring the interaction between visual scenes and specific sound sources in traffic spaces and its influence on acoustic evaluation mechanisms.

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引用次数: 0

Damage mechanism of tunnel base heave under interlayer weakening effect in nearly horizontal layered rock

IF 6.7 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2025-02-20 DOI: 10.1016/j.tust.2025.106439

Xingyu Zhu, Zhiqiang Zhang, Ying Feng, Hang Yu

The damage mechanisms and mechanical behavior of tunnel base heave in nearly horizontal layered rock were researched in this paper through three perspectives: causal analysis, mechanical analysis, and sensitivity analysis. Firstly, through field tests and laboratory experiments, it was found that the layered rock mass with structural planes being significantly weakened due to continuous groundwater infiltration, leading to heave deformation of the tunnel base subject to horizontal geostress. Then, the mechanical model for buckling instability of a layered rock structure was established to derive the deflection curve under interlayer load and the limit state buckling equations of the layered rock mass. Theoretical results indicate that the critical buckling instability load of layered rock masses is related to the horizontal stress and their structural and material characteristics, while the interlayer load influences the deformation before buckling. Meanwhile, by incorporating a discrete element numerical model employing the Bonded Block Model to represent the multi-layered structural planes, the interlayer load pattern and the base heave deformation were determined. Finally, the stability coefficients were calculated by using the critical buckling load equations for several typical cases of high-speed railway tunnels to identify the transition of the instability state of layered rock mass. The analysis of instability state of tunnel base and the sensitivity of influencing factor provides a reference for identifying and mitigating the base heave for the high-speed railway tunnel.

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引用次数: 0

A modified domain reduction method for analysing the 3D seismic response of long tunnels

IF 6.7 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2025-02-19 DOI: 10.1016/j.tust.2025.106461

Swetha Veeraraghavan, Bhavesh Banjare

Tunnels located close to earthquake faults have been damaged during recent earthquakes, and the damage patterns suggest a complex 3D response of the tunnel in these zones. The domain reduction method (DRM) is a computationally efficient finite element method widely used to analyse the response of finite structures to wavefields generated through earthquake fault rupture simulations. However, this method does not work for simulating the seismic response of infinitely long tunnels. In this work, we modify DRM to accommodate infinitely long tunnels. We verify the accuracy of the modification for a wide range of parameters by comparing the numerical solution with existing semi-analytical solutions for the 3D response of tunnels subject to seismic waves incident on the tunnel from arbitrary directions. The boundary effects resulting from the truncation of the soil domain for numerical modelling are also explored, and recommendations on the numerical domain dimensions to ensure accurate results are presented. This modified DRM would be a powerful tool for analysing the 3D seismic response of tunnels subjected to near-fault wavefields generated through earthquake fault rupture scenarios.

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引用次数: 0

Experimental investigation on the effect of sealing speed on mine roadway fire behavior with longitudinal ventilation

IF 6.7 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2025-02-19 DOI: 10.1016/j.tust.2025.106494

Ruizhi Guo, Jun Deng, Li Ma, Jing Fan, Gaoming Wei, Wenbo Gao

Sealing both ends of the fire source is an effective method for controlling roadway fires. To better understand the impact of the sealing speed on the fire behavior of longitudinal ventilation roadway, a dynamic sealing method was proposed. A series of 1/10 scaled experiments were conducted at four different sealing speeds, and the variations in flame shape, mass loss rate (MLR), self-extinction time, smoke component concentrations near the fire source, and the ceiling temperature directly above the fire source (T_c) were investigated. The results indicate that in the early stage, the flame exhibits a significant downstream tilt, which gradually decreases as the sealing ratio increases. The time from ignition to self-extinction (t₁) shows a monotonically increasing linear relationship with sealing speed, and there is an overall decreasing trend between the time from complete sealing to self-extinction (t₂) and sealing speed. For oil pan sizes of 12.8 cm × 12.8 cm and 18.1 cm × 18.1 cm, the fuel MLR exhibits “single peak” and “double peaks” trends, and the concentrations of O₂ and CO almost reach the peak values at the same time. The limit oxygen concentrations corresponding to self-extinction are 15.2 %–15.5 % and 13.3 %–13.8 %, respectively, and the impact of sealing speed on the limit oxygen concentration, CO concentration and maximum T_c is not significant. Additionally, when the oil pan size is large, the slow sealing speeds may lead to fuel boiling overflow, which is detrimental to fire extinguishing. This study provides guidance for fire risk assessment during the mine roadway fire sealing process and contributes to the scientific development of sealing strategies.

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引用次数: 0

A systematic review on underground logistics system: designs, impacts, and future directions

IF 6.7 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2025-02-19 DOI: 10.1016/j.tust.2025.106483

Fengshan Li, Kum Fai Yuen

The Underground Logistics System (ULS) is a promising mode of freight transportation for the future. It is expected to address conventional city logistics dilemmas such as low transport efficiency and negative environmental impacts. A comprehensive understanding of ULS functions is crucial for promoting its development. Therefore, this research aims to (1) review ULS-related studies; (2) outline the main ULS designs from the perspectives of network types, network planning and optimization, as well as last-mile delivery measures; and (3) summarize the impacts of ULS on society, the economy, and the environment. Adhering to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, a total of 132 research articles were retrieved from three databases (i.e., Scopus, Web of Science, and IEEE Xplore) and grey literature to conduct a systematic literature review. In general, this systematic review reveals that the integration of ULS with the metro system is a current research hotspot. It is also found that the mixed-integer programming model is commonly adopted in existing studies to solve problems related to location and routing. Additionally, several last-mile delivery solutions for ULS (i.e., door-to-door, self-pickup, and a combination of other overground delivery methods) are presented. Moreover, the findings demonstrate that, despite high construction costs, ULS can provide significant benefits to society, the economy, and the environment. More importantly, the limitations of current ULS-related research are analyzed, and future research directions for ULS are proposed. This research provides comprehensive insights into ULS and offers specific policy implications for its future management.

{"title":"A systematic review on underground logistics system: designs, impacts, and future directions","authors":"Fengshan Li, Kum Fai Yuen","doi":"10.1016/j.tust.2025.106483","DOIUrl":"10.1016/j.tust.2025.106483","url":null,"abstract":"<div><div>The Underground Logistics System (ULS) is a promising mode of freight transportation for the future. It is expected to address conventional city logistics dilemmas such as low transport efficiency and negative environmental impacts. A comprehensive understanding of ULS functions is crucial for promoting its development. Therefore, this research aims to (1) review ULS-related studies; (2) outline the main ULS designs from the perspectives of network types, network planning and optimization, as well as last-mile delivery measures; and (3) summarize the impacts of ULS on society, the economy, and the environment. Adhering to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, a total of 132 research articles were retrieved from three databases (i.e., Scopus, Web of Science, and IEEE Xplore) and grey literature to conduct a systematic literature review. In general, this systematic review reveals that the integration of ULS with the metro system is a current research hotspot. It is also found that the mixed-integer programming model is commonly adopted in existing studies to solve problems related to location and routing. Additionally, several last-mile delivery solutions for ULS (i.e., door-to-door, self-pickup, and a combination of other overground delivery methods) are presented. Moreover, the findings demonstrate that, despite high construction costs, ULS can provide significant benefits to society, the economy, and the environment. More importantly, the limitations of current ULS-related research are analyzed, and future research directions for ULS are proposed. This research provides comprehensive insights into ULS and offers specific policy implications for its future management.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"159 ","pages":"Article 106483"},"PeriodicalIF":6.7,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on the control effect of tunnel large deformation considering surrounding rock unloading expansion effect and support structure characteristics

IF 6.7 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2025-02-18 DOI: 10.1016/j.tust.2025.106475

Jimeng Feng , Jiadai Song , yulin Zhou , jiacheng Song , yifei Li , zhijian Yan , Junru Zhang , Longyan Duan

As engineering construction advances, the issue of large tunnel deformations remains one of the most common and challenging hazards to control during construction. Control measures for such deformations are often limited to a single factor—either the surrounding rock or the support structure—without comprehensively accounting for the effects of excavation unloading and the specific characteristics of the support structure. To address this gap, this paper proposes a numerical simulation method that considers both the expansion effect due to surrounding rock unloading and the properties of the support structure (UE-SCM). Through a combination of laboratory testing and numerical simulation, this study evaluates the control effectiveness of three support structure systems under large deformation conditions, analyzing the interaction between the surrounding rock and the support structure to interpret the results. Key findings are as follows: 1) Conventional numerical simulations often overlook the weakening of the surrounding rock and changes in the mechanical properties of support materials induced by excavation unloading, leading to designs with limited effectiveness in controlling large deformation; 2) The proposed simulation method, focused on large tunnel deformations, emphasizes the effects of changes in the elastic modulus of the rock mass and the support structure. 3) For higher levels of large deformations, a support structure system with yielding properties is recommended, as it improves control over large deformations.

{"title":"Study on the control effect of tunnel large deformation considering surrounding rock unloading expansion effect and support structure characteristics","authors":"Jimeng Feng , Jiadai Song , yulin Zhou , jiacheng Song , yifei Li , zhijian Yan , Junru Zhang , Longyan Duan","doi":"10.1016/j.tust.2025.106475","DOIUrl":"10.1016/j.tust.2025.106475","url":null,"abstract":"<div><div>As engineering construction advances, the issue of large tunnel deformations remains one of the most common and challenging hazards to control during construction. Control measures for such deformations are often limited to a single factor—either the surrounding rock or the support structure—without comprehensively accounting for the effects of excavation unloading and the specific characteristics of the support structure. To address this gap, this paper proposes a numerical simulation method that considers both the expansion effect due to surrounding rock unloading and the properties of the support structure (UE-SCM). Through a combination of laboratory testing and numerical simulation, this study evaluates the control effectiveness of three support structure systems under large deformation conditions, analyzing the interaction between the surrounding rock and the support structure to interpret the results. Key findings are as follows: 1) Conventional numerical simulations often overlook the weakening of the surrounding rock and changes in the mechanical properties of support materials induced by excavation unloading, leading to designs with limited effectiveness in controlling large deformation; 2) The proposed simulation method, focused on large tunnel deformations, emphasizes the effects of changes in the elastic modulus of the rock mass and the support structure. 3) For higher levels of large deformations, a support structure system with yielding properties is recommended, as it improves control over large deformations.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"159 ","pages":"Article 106475"},"PeriodicalIF":6.7,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rockburst prediction based on 3D spatial feature system of tunnel face drilling parameters

IF 6.7 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2025-02-18 DOI: 10.1016/j.tust.2024.106350

Wenhao Yi , Mingnian Wang , Qinyong Xia , Hongqiang Sun , Jianjun Tong

Rockbursts, characterized by their suddenness, uncertainty, and randomness, directly affect construction safety of tunnels. Accurate prediction of rockbursts is essential for mitigating or even eliminating these hazards. To address the limitations of existing rockburst prediction models, such as low timeliness and heavy reliance on manually input features, this study proposed a novel rockburst prediction model based on a 3D spatial feature system of tunnel face drilling parameters. First, four original drilling parameters − hammer pressure (P_h), feed pressure (P_f), rotary pressure (P_r), and feed speed (V_p) − along with rockburst grades were collected from 1429 rockburst cases. Then, a 3D spatial feature system of tunnel face drilling parameters and a rockburst prediction database were established on the basis of these four original drilling parameters and their 3D spatial distribution features. The 3D spatial feature system consisted of spatial vectors with dimensions of 42 × 18 × 3. Furthermore, a rockburst prediction model was developed based on the 3D spatial feature system and convolutional neural network (CNN) algorithm. The model utilized drilling parameters as input and rockburst grades as output. Accuracy, precision, recall, and

F_{1}

value of the prediction set were employed to comparatively analyze the performance of the CNN models against traditional machine learning (ML) models.

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引用次数: 0

Development and application of air-assisted spraying device for dust suppression on tunnel boring machine

IF 6.7 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2025-02-18 DOI: 10.1016/j.tust.2025.106469

Xinzhe Wang , Pengfei Wang , Shilin Li , Shiqiang Chen

For the current problems of high water consumption, low dust suppression efficiency, and poor long-distance dust suppression effect of the spraying device on the tunneling machine in the coal mine comprehensive mechanized excavation working face, a novel air-assisted spraying device for dust suppression on tunneling machine was designed in this study. The basic characteristics of the flow field and spray field of the air-assisted spraying device for dust suppression on tunneling machine were analyzed by the computational method of CFD numerical simulation. The optimal operating parameters of the device were explore. The device was applied to the stone drift working face to test its dust suppression efficiency on the site. The results of the study showed that the air-assisted spraying device for dust suppression on tunneling machine, based on the principle of the Coanda Effect, can produce a diversion effect, effectively improving the atomization effect and dust suppression efficiency of the device and reducing its water consumption. This device can blow the spray to a distant dust suppression area to achieve long-distance dust suppression; and the rear of the device can suction the surrounding dusty gas, which is then sprayed out together with the mist, achieving a secondary dust suppression effect. The rational gas supply pressure and water pressure for application at the coal mine comprehensive mechanized excavation working face are 0.4 MPa and 2.0 MPa, respectively; the optimal installation angles for the nozzle and the spray cylinder are 45 and 30°, respectively. The results of on-site test showed that the device can effectively reduce the dust concentration in the working face of the tunneling machine, with an average dust suppression efficiency of 61.39 % and 43.19 % for total coal powdered and respirable coal powdered, respectively. After adding the air-assisted spraying device for dust suppression on the tunneling machine, the dust suppression efficiency for total coal powdered and respirable coal powdered showed a relative improvement of more than 30 %.

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引用次数: 0