Underground Space最新文献_第2页

Development of a 3D-point cloud-based spatiotemporal series model for tunnel rock mass discontinuities prediction 基于三维点云的隧道岩体结构面时空序列预测模型研究

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-11-13 DOI: 10.1016/j.undsp.2025.06.009

Gang Yang , Tianbin Li

Predicting the three-dimensional (3D) distributions of discontinuities within rock masses is crucial for evaluating tunnel stability. However, this task is challenging due to the inherent opacity of rock, which prevents the direct observation of discontinuities. Most current methods for predicting discontinuities are based on extracting the two-dimensional intersection lines of spatial discontinuities. In this paper, we propose a novel, purely visual approach to analyze and predict the 3D distributions of discontinuities in rock masses. In this method, a 3D model of the tunnel face is constructed based on motion prediction and multi-view stereo vision, and the development of discontinuities is then predicted. Each set of discontinuities is projected onto the virtual tunnel face using a convex hull algorithm, creating a virtual trace. A newly developed algorithm for predicting spatiotemporal sequences, which incorporates a self-attention mechanism and a zigzag recurrent transition mechanism, is then applied to predict the evolution of discontinuities. For testing and verification, we used smartphones to collect surface data on multiple sets of excavated rock from the Bimoyuan Tunnel in Sichuan, China. Extensive experiments involving these surface data demonstrated the effectiveness of our proposed method. The findings provide technical support for predicting tunnel collapse and ensuring tunnel safety.

岩体内结构面三维分布的预测是评价隧道稳定性的关键。然而，由于岩石固有的不透明性，这项任务具有挑战性，这阻碍了对不连续面的直接观察。目前大多数预测不连续面的方法都是基于提取空间不连续面的二维相交线。在本文中，我们提出了一种新的、纯视觉的方法来分析和预测岩体中不连续面的三维分布。该方法基于运动预测和多视点立体视觉技术，构建巷道工作面三维模型，预测不连续面的发展。使用凸包算法将每组不连续性投影到虚拟隧道表面上，创建虚拟痕迹。提出了一种新的时空序列预测算法，该算法结合了自注意机制和之字形循环过渡机制，用于预测不连续点的演化。为了测试和验证，我们使用智能手机收集了中国四川Bimoyuan隧道多组开挖岩石的表面数据。涉及这些表面数据的大量实验证明了我们提出的方法的有效性。研究结果为预测隧道塌陷、保障隧道安全提供了技术支持。

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引用次数: 0

Physical model test and numerical simulation for the interaction analysis between tunnel and masonry arch bridge 隧道与砌体拱桥相互作用分析的物理模型试验与数值模拟

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-11-13 DOI: 10.1016/j.undsp.2025.07.006

Si-yi Huang , Li-yuan Tong , Ming-fei Zhang , Tao Qiu , Xiao-dong Li , Jia-jia Wan

Masonry arch bridges serve as essential transport infrastructure and are often protected as cultural heritage sites. While most studies emphasize their response to vertical loading, limited attention has been given to their behavior under the influence of nearby tunnel excavation. This study investigates the interaction between tunnel-induced ground movement and masonry arch bridges through physical model tests and numerical simulations. Two typical arch bridge types are examined to assess deformation patterns caused by tunneling. A coupled discrete element and finite difference method is proposed to simulate soil–structure interactions, and the model is validated against experimental results. The results highlight that the arch span has a major impact on soil behavior. Larger spans lead to wider settlement zones and more uniform stress distribution but increase structural vulnerability. Semi-circular arches develop tensile strain at the crown and compressive strain at the foot under tunneling. Meanwhile, the joint displacements follow a three-dimensional Gaussian distribution, influenced by tunnel volume loss and burial depth, especially in circular arches. Increasing Young’s modulus and joint shear stiffness of masonry arch bridges through technical means, such as grouting, is helpful to reduce deformation and cracking. These findings support risk assessment and design improvements for masonry bridges in tunneling environments.

砌体拱桥是重要的交通基础设施，常作为文化遗产受到保护。虽然大多数研究都强调其对竖向荷载的响应，但对其在附近隧道开挖影响下的行为关注有限。通过物理模型试验和数值模拟，研究了隧道引起的地面移动与砌体拱桥的相互作用。研究了两种典型的拱桥类型，以评估隧道开挖引起的变形模式。提出了一种离散元-有限差分耦合方法来模拟土-结构相互作用，并与实验结果进行了对比验证。结果表明，拱跨对土体特性有重要影响。跨度越大，沉降区越宽，应力分布越均匀，结构脆弱性越大。在隧道开挖作用下，半圆拱在拱顶处产生拉应变，在拱脚处产生压应变。同时，节理位移服从三维高斯分布，受隧道体积损失和埋深的影响，圆形拱尤其明显。通过注浆等技术手段提高砌体拱桥的杨氏模量和接缝抗剪刚度，有助于减少变形和开裂。这些发现为隧道环境下砌体桥梁的风险评估和设计改进提供了依据。

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引用次数: 0

Building information modelling for 3D underground land administration: Research challenges and future pathways 三维地下土地管理的建筑信息建模：研究挑战和未来途径

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-11-11 DOI: 10.1016/j.undsp.2025.07.005

Lanxuan Shen, Behnam Atazadeh, Serene Ho, Abbas Rajabifard

Underground land and property information is currently recorded, registered, and managed using two-dimensional (2D) datasets provided in survey plans. There are significant communication challenges associated with fragmented 2D land and property data in complex underground projects. On the other hand, building information modelling (BIM) has been adopted for three-dimensional (3D) digital management of the lifecycle of built assets, including those of underground infrastructure. BIM can potentially provide a fully integrated 3D representation of rights, restrictions, and responsibilities for underground assets. Therefore, this study investigates the potential of BIM to support the development of 3D underground land administration (ULA) through an integrated data modelling approach. By reviewing the current body of knowledge, research challenges, and future pathways for adopting BIM-based approaches for 3D ULA data management are identified, specifically across legal, institutional, and technical dimensions. One key finding is the critical transition from current 2D approaches to BIM environments. This will lead to integrated and smooth information flow, which is critically important for more efficient ULA practices, enhancing communication among various stakeholders, improving decision-making in ULA, and contributing to sustainable underground space planning and development.

目前，地下土地和财产信息的记录、登记和管理使用的是调查计划中提供的二维数据集。在复杂的地下项目中，与碎片化的二维土地和财产数据相关的通信存在重大挑战。另一方面，建筑信息模型（BIM）已被用于对建筑资产（包括地下基础设施）的生命周期进行三维（3D）数字化管理。BIM可以潜在地为地下资产提供完全集成的权利、限制和责任的3D表示。因此，本研究探讨了BIM通过集成数据建模方法支持3D地下土地管理（ULA）发展的潜力。通过回顾当前的知识体系、研究挑战和未来采用基于bim的方法进行3D ULA数据管理的途径，特别是在法律、制度和技术方面。一个关键的发现是从当前的2D方法到BIM环境的关键转变。这将导致整合和顺畅的信息流，这对于更有效的ULA实践、加强各利益相关者之间的沟通、改进ULA决策以及促进可持续的地下空间规划和发展至关重要。

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引用次数: 0

Excavation-induced fracturing mechanisms in deep hard rock: A hierarchical block model 深部硬岩开挖致裂机制：一个分层块体模型

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-11-10 DOI: 10.1016/j.undsp.2025.07.002

Shili Qiu , Shirui Zhang , Quan Jiang , Yuheng Fang , Ping Li , Shaojun Li , Yaxun Xiao , Dingping Xu

The fracture characteristics of the excavation damage zones (EDZs) of deeply buried tunnels are closely related to energy evolution, and they are highly valuable for support design. Advanced numerical simulation techniques have shown the potential for evaluating the EDZ properties. On the basis of the finite-discrete element method (FDEM) and Poisson’s random block generation technique, the virtual block model (VBM) is proposed to characterize the intact rock masses surrounding tunnels. Moreover, a virtual block upscale principle (VB-UP) is proposed to determine the geometric and meso-mechanical parameters. The Canadian Underground Research Laboratory (URL) and China Jinping Underground Laboratory Phase II (CJPL-II) project excavations are simulated, and the excavation-induced fracture characteristics of the surrounding rock masses are analyzed in detail. The VBM captures the tensile, shear, and mixed fracture properties under excavation-induced confining pressure evolution. Then, the thicknesses of the spalling rock slabs in Lab #7 of the CJPL-II project are evaluated via the Otsu method. Combined with onsite monitoring data, the validity and advancement of the VBM are verified. This study expands the applicability of the FDEM and provides a new method for assessing the EDZs of surrounding rocks.

深埋隧道开挖损伤区的断裂特征与能量演化密切相关，对支护设计具有重要的参考价值。先进的数值模拟技术已经显示出评估EDZ特性的潜力。在有限离散元法（FDEM）和泊松随机块体生成技术的基础上，提出了隧道围岩完整体的虚拟块体模型（VBM）。此外，还提出了一种虚拟块体升级原理（VB-UP）来确定几何参数和细观力学参数。VBM捕获了在开挖引起的围压演化下的拉伸、剪切和混合破裂特性。然后，采用Otsu法对CJPL-II项目7号实验室剥落岩板的厚度进行了评价。结合现场监测数据，验证了该方法的有效性和先进性。该研究扩展了FDEM的适用性，为评价围岩edz提供了一种新的方法。

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引用次数: 0

An introduction to tunnel lighting: Basis, calculations, and future lines in the interface between safety and sustainability 介绍隧道照明：基础，计算，和未来的线路之间的接口安全和可持续性

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-11-10 DOI: 10.1016/j.undsp.2025.06.008

Antonio Peña-García

The exponential increase in the number of new tunnels, their length, and complexity makes safe and comfortable driving in these infrastructures a must. Among all the technical characteristics necessary to achieve this target, accurate lighting is the most important. However, the peculiarities of driving in tunnels, narrowly linked to the infrastructure itself, but also to physiological and psychological characteristics of drivers, make good lighting complex and highly consuming in terms of energy, financial resources, use of raw materials, environmental impact, and maintenance. The relatively recent introduction of LEDs in tunnels and the new strategies to decrease energy demands and profit from sunlight, whose energy savings can reach 40% in a wide variety of cases, together with the progressive aging of drivers, are challenges for researchers in this field, that currently seek new perspectives affecting the tunnel, the roads before and after, and the portal surroundings. This work approaches the principles of tunnel lighting, its singularities, open points with difficult solutions, and some others that are already contributing to safer and more sustainable tunnels and underground roads.

新隧道的数量、长度和复杂性呈指数级增长，使得在这些基础设施中安全舒适地驾驶成为必须。在实现这一目标所需的所有技术特征中，精确的照明是最重要的。然而，在隧道中驾驶的特殊性，不仅与基础设施本身有关，而且与驾驶员的生理和心理特征有关，这使得良好的照明在能源、财力、原材料使用、环境影响和维护方面都变得复杂和高度消耗。最近在隧道中引入led以及减少能源需求和从阳光中获益的新策略（在各种情况下节能可达40%），再加上驾驶员的逐渐老龄化，这对该领域的研究人员来说是一个挑战，他们目前正在寻求影响隧道、前后道路和入口环境的新视角。这项工作接近隧道照明的原理，它的奇异性，具有困难解决方案的开放点，以及其他一些已经为更安全和更可持续的隧道和地下道路做出贡献的原理。

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引用次数: 0

Low-carbon efforts for underground space development in Singapore 新加坡地下空间开发的低碳努力

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-11-10 DOI: 10.1016/j.undsp.2025.07.004

Tong Jiao , Pei Peng , Shixiang Li , Wei Wu

Singapore, a land- and resource-scarce nation, serves as a global example of how low-carbon initiatives can drive the sustainable development of underground space in densely populated urban environments. This critical review highlights major low-carbon efforts from both academia and the industry over the past decade, along with supportive policies that integrate these efforts into governance and decision-making processes. These efforts, including cutting carbon emissions through material efficiency, shaping carbon emissions through digitalized construction, and tracking carbon emissions through sustainable operation, not only reflect the national efforts to carbon reductions across the full lifecycle of underground infrastructure but also offer valuable insights for similar urban settings worldwide. Furthermore, the review identifies the development of a well-defined framework for lifecycle carbon assessment as an overarching trend to promote carbon reductions in underground space development. However, significant challenges remain, such as the need for comprehensive data collection and integration, as well as a deeper understanding of how human behavior interacts with operational efficiency. Addressing these challenges requires interdisciplinary collaborations among government agencies, academic researchers, and industry practitioners to develop robust frameworks and dynamic models that more reliably capture the impact of low-carbon strategies on urban underground environments.

新加坡是一个土地和资源稀缺的国家，在人口密集的城市环境中，低碳倡议如何推动地下空间的可持续发展，在全球树立了榜样。这篇批判性的综述强调了过去十年学术界和工业界的主要低碳努力，以及将这些努力纳入治理和决策过程的支持性政策。这些努力，包括通过材料效率减少碳排放，通过数字化建设塑造碳排放，以及通过可持续运营跟踪碳排放，不仅反映了国家在地下基础设施全生命周期内减少碳排放的努力，而且为全球类似的城市环境提供了宝贵的见解。此外，该综述确定了开发一个明确定义的生命周期碳评估框架是促进地下空间开发碳减排的总体趋势。然而，重大挑战仍然存在，例如需要全面的数据收集和集成，以及更深入地了解人类行为如何与运营效率相互作用。应对这些挑战需要政府机构、学术研究人员和行业从业者之间的跨学科合作，以开发强大的框架和动态模型，更可靠地捕捉低碳战略对城市地下环境的影响。

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引用次数: 0

Development of surface settlement under the combined effect of foundation pit dewatering and excavation: Insights from experimental modelling 基坑降水与开挖联合作用下地表沉降的发展：来自实验模型的启示

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-11-07 DOI: 10.1016/j.undsp.2025.07.003

Kai-Fang Yang , Min-Liang Chi , Chang-Jie Xu , Chao-Feng Zeng , Lu-Jv Liang , Zhi Ding , Ya-Shi Qiu

To investigate surface settlement under the combined effect of foundation pit dewatering and excavation, a series of experiments was conducted using a scaled model of a deep foundation pit at a metro station. During experimental simulations of the dry excavation and dewatering processes, data were collected on surface settlement, water heads outside the pit, and deflection of the diaphragm wall. The characteristics of surface settlement were compared and analyzed under different conditions with a focus on the development of surface settlement during dewatering and excavation at key locations outside the pit. The combined effect of dewatering and excavation was found to increase surface settlement outside the pit and expand its area of influence. The insertion ratio of the diaphragm wall (n) significantly affected surface settlement; as the insertion ratio increased, surface settlement, along with its area of influence, decreased. For n < 1.25, the area beyond twice the excavation depth was considered a minor area of settlement influence. In contrast, for n ≥ 1.25, this area wasn’t classified as a minor area of settlement influence. As excavation depth increased, the surface settlement pattern outside the pit transitioned from triangle-type to groove-type, groove-type settlement occurred when A_s ≥ 1.6A_c, whereas triangle-type settlement occurred under other conditions (A_s represents the area of the deep inward part of the convex deformation of the diaphragm wall; A_c refers to the cantilever part of the diaphragm wall). This study provides insights into the development of surface settlement during dewatering and excavation and serves as a valuable reference for innovations in sustainable and resilient underground design.

为了研究基坑降水和开挖联合作用下的地表沉降，采用地铁车站深基坑的比例模型进行了一系列试验研究。在干掘和降水过程的实验模拟中，收集了地表沉降、坑外水头和连续墙挠度的数据。对比分析了不同条件下的地表沉降特征，重点分析了基坑外关键位置降水和开挖过程中地表沉降的发展情况。降水和开挖的联合作用增加了基坑外地表沉降，扩大了其影响范围。连续墙插入比(n)显著影响地表沉降；随着插入比的增大，地表沉降及其影响面积减小。对于n <； 1.25，超过两倍开挖深度的区域被认为是沉降影响较小的区域。当n≥1.25时，该区域不属于沉降影响较小的区域。随着开挖深度的增加，基坑外地表沉降形态由三角形向沟槽型过渡，当As≥1.6Ac时出现沟槽型沉降，其他条件下均出现三角形沉降（As为连续墙凸面变形向内深处区域面积，Ac为连续墙悬臂部分）。该研究为降水和开挖过程中地表沉降的发展提供了见解，并为可持续和弹性地下设计的创新提供了有价值的参考。

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引用次数: 0

Long-term horizontal displacement induced by shield tunneling in consolidating soft ground 软土地基固结中盾构开挖引起的长期水平位移

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-11-05 DOI: 10.1016/j.undsp.2025.06.007

Haibo Wang , Rongjun Zhang , Fengjuan Tao , Junjie Zheng

Shield tunneling often gives rise to excessive long-term horizontal displacement in consolidating soft ground, posing risks to the safety of adjacent structures. This study investigates the characteristics of long-term horizontal displacement induced by shield tunneling in consolidating soft ground, with the aim of providing practical guidance for optimizing ground treatment strategies. Firstly, a three-dimensional numerical model, validated by a case history in Shanghai, is employed to analyze the horizontal displacement of the soft ground. Comparisons are conducted between the horizontal displacements in normally-consolidated and consolidating cases. Subsequently, the influence of the consolidating state on the horizontal displacement is investigated by numerical analyses. The simulation results indicate that the short-term horizontal displacements follow a similar trend and comparable magnitude in both normally-consolidated and consolidating soft soil. However, the long-term horizontal displacements display a quite different pattern. The maximum discrepancy between normally-consolidated and consolidating cases is observed at the ground surface, where the long-term horizontal displacements of the two cases orient toward entirely opposite directions. The discrepancy at the ground surface increases as the degree of consolidation or the tunnel depth decreases, while it is relatively insensitive to the thickness of the newly filled layer. Finally, an empirical estimation method is proposed to predict the long-term horizontal displacement at the ground surface for shield tunneling in consolidating soft ground.

盾构隧道在加固软土地基过程中，经常产生过大的长期水平位移，对相邻结构的安全构成威胁。研究盾构隧道在软土地基加固过程中引起的长期水平位移特征，为优化地基处理策略提供实践指导。首先，建立了上海地区软土地基水平位移的三维数值模型，并进行了实例验证。对正常固结和固结情况下的水平位移进行了比较。随后，通过数值分析研究了固结状态对水平位移的影响。模拟结果表明，正常固结和固结软土的短期水平位移具有相似的趋势和量级。然而，长期水平位移表现出完全不同的模式。正常固结和固结情况的最大差异出现在地表，两种情况的长期水平位移方向完全相反。地表差异随固结程度或隧道深度的减小而增大，而对新填层厚度相对不敏感。最后，提出了一种预测软土地基固结中盾构隧道地表长期水平位移的经验估计方法。

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引用次数: 0

Response law of rock-cutterhead interaction in intact sandstone through TBM tunnelling test 通过TBM隧道试验研究完整砂岩岩刀相互作用的响应规律

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-10-24 DOI: 10.1016/j.undsp.2025.06.006

Weiqiang Xie , Xiaoli Liu , Caifeng Zhang , Xiaoxiong Zhou , Jian Chen

The unclear response law of rock-cutterhead interaction seriously limits the tunnel boring machine (TBM) efficiency. Various influencing factors make it difficult to illustrate the law using the TBM tunnelling results in the field. In the present study, we develop a novel TBM tunnelling test platform (DGTBM-A) to analyze rock-cutterhead interaction. The components and functions of the platform are introduced. The cubic sandstone specimens (500 mm

\times

500 mm

\times

500 mm) with three distinct uniaxial compressive strengths (low (24.94 MPa), medium (61.22 MPa), and high (95.04 MPa) are used for TBM tunnelling test. The effects of cutterhead thrust, rotational speed and rock strength on the rock-cutterhead interaction are examined. Key tunnelling parameters, TBM performance indices, and rock muck characteristics are analyzed to reflect their effects. The findings revealed significant impacts of cutterhead thrust, rotational speed and rock strength on torque, advance rate, penetration rate, specific energy, and field penetration index. Additionally, the characteristics of the produced rock muck varied with the applied tunnelling parameters, providing insights into the efficiency and effectiveness of rock breaking. Correlations between the TBM performance indices and the influencing factors are established. The results contribute to a better understanding of the mechanics involved in TBM tunnelling in sandstone, aiding in optimizing operational parameters for improved performance and cost-efficiency in engineering practice.

岩刀相互作用的响应规律不明确，严重制约了隧道掘进机的掘进效率。由于各种因素的影响，难以在现场用隧道掘进机的开挖结果来说明这一规律。在本研究中，我们开发了一种新的TBM掘进试验平台（DGTBM-A）来分析岩石-刀盘相互作用。介绍了平台的组成和功能。采用单轴抗压强度低（24.94 MPa）、中（61.22 MPa）、高（95.04 MPa） 3种不同强度的立方体砂岩试件（500 mm × 500 mm × 500 mm）进行TBM掘进试验。研究了刀盘推力、转速和岩石强度对刀盘岩石相互作用的影响。分析了关键掘进参数、掘进机性能指标和岩屑特征，以反映其影响。研究结果表明，刀盘推力、转速和岩石强度对扭矩、推进速度、穿透速度、比能和现场穿透指数有显著影响。此外，所产生的岩石泥的特征随所应用的隧道参数而变化，这为岩石破碎的效率和有效性提供了见解。建立了掘进机性能指标与影响因素之间的相关性。研究结果有助于更好地理解隧道掘进机在砂岩中的掘进力学，有助于优化操作参数，以提高工程实践中的性能和成本效益。

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引用次数: 0

Thrust-vectoring automatic shield tunneling technology: Method, verification and application 推力矢量自动盾构掘进技术：方法、验证与应用

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-10-24 DOI: 10.1016/j.undsp.2025.01.008

Yeting Zhu , Di Wu , Zhihua Wang , Zixin Zhang , Shuaifeng Wang , Xin Huang , Yuan Qin , Yanfei Zhu , Fan Wang

Recognizing the formidable challenge of achieving millimeter-level precision in controlling shield machine attitudes amidst thrust forces exceeding thousands of tons on a global scale, a thrust-vectoring automatic shield tunneling technology was introduced to effectively mitigate potential inaccuracies stemming from human intervention. Initially, a load-thrust “dual-vector” motion control mechanism was adopted, grounded in defining the shield thrust vector and establishing the interactive correlation between shield attitude deviation points and thrust action points in both horizontal and vertical orientations through comprehensive data assessments. Subsequently, a parallel proportional-integral-derivative control law was devised for stability control of shield machines, delineating the functional link between alterations in shield attitudes and displacements of thrust action points, with initial validation conducted via full-scale model trials. A motion trajectory for correcting shield attitudes was devised, and a thrust vector control approach was formulated by amalgamating feedforward calculations with feedback adjustments. The application of this thrust-vectoring automatic tunneling technology in a large-diameter shield tunneling endeavor yielded the subsequent key findings: a consistent deviation of approximately 2.5% was upheld between target and actual thrust forces, with actual shield velocity managed within a –1 to +1 mm/min range from the target value. To ensure robust steering capability of the shield machine, target thrust moments in both horizontal and vertical directions marginally exceeded actual values, with satisfactory execution. The interplay between shield attitudes and thrust action points in both horizontal and vertical dimensions exhibited a characteristic akin to “sugar-coated haws on a stick”. Despite notable “kowtow” occurrences during segment assembly, statistical analysis indicated that deviations in shield attitude in horizontal and vertical planes were ultimately contained within –20 to +5 mm and –45 to –28 mm ranges, respectively, markedly surpassing average manual control standards.

认识到在全球范围内超过数千吨的推力下实现毫米级精度控制盾构机姿态的艰巨挑战，引入了推力矢量自动盾构隧道技术，以有效减轻人为干预造成的潜在不准确性。首先，采用载荷-推力“双矢量”运动控制机制，在确定盾构推力矢量的基础上，通过综合数据评估，建立盾构姿态偏差点与推力作用点在水平和垂直方向上的交互关系。随后，设计了用于盾构机稳定性控制的并联比例-积分-导数控制律，描述了盾构姿态变化与推力作用点位移之间的功能联系，并通过全尺寸模型试验进行了初步验证。设计了修正盾构姿态的运动轨迹，提出了前馈计算与反馈调整相结合的推力矢量控制方法。该推力矢量自动掘进技术在大直径盾构掘进中的应用取得了以下重要发现：目标推力与实际推力之间的偏差约为2.5%，实际盾构速度与目标值的偏差范围在-1 ~ +1 mm/min之间。为了保证盾构机稳定的转向能力，在水平和垂直方向上的目标推力力矩都略大于实际值，执行情况令人满意。在水平和垂直维度上，盾牌姿态和推力作用点之间的相互作用表现出类似于“棒子上的糖衣山楂果”的特征。尽管在分段装配过程中出现了明显的“磕头”现象，但统计分析表明，水平和垂直平面上的屏蔽姿态偏差最终分别被控制在-20至+5 mm和-45至-28 mm的范围内，明显超过了平均的手动控制标准。

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引用次数: 0