摘 要
随着城市化进程的加快和地下空间开发的深入，基坑工程在建筑工程中占据越来越重要的地位，而基坑支护结构的稳定性直接关系到施工安全与周边环境的保护因此，对基坑支护结构的稳定性分析及安全控制技术进行系统研究具有重要的理论意义和工程价值本研究以典型基坑工程为背景，结合数值模拟、现场监测和理论分析等手段，深入探讨了基坑支护结构的受力特性及其影响因素，并提出了针对性的安全控制技术具体而言，首先通过有限元方法建立了基坑支护结构的三维数值模型，分析了不同工况下支护结构的变形规律和应力分布特征其次，基于实际工程案例，开展了长期现场监测，获取了支护结构的位移、内力变化等关键数据，并将其与数值模拟结果进行对比验证，确保了研究结论的可靠性再次，针对传统设计方法中存在的不足，引入了改进的极限平衡法，优化了基坑支护结构的设计参数最后，结合研究成果，提出了一套完整的基坑施工安全控制技术体系，包括实时预警机制和动态调整策略研究表明，该技术体系能够显著提高基坑支护结构的稳定性，降低施工风险本研究的创新点在于将数值模拟与现场监测有机结合，揭示了复杂条件下基坑支护结构的稳定性机理，并为类似工程提供了科学依据和实践指导主要贡献体现在完善了基坑支护结构的设计理论，推动了相关技术标准的制定，同时为地下工程建设的安全管理提供了新思路
关键词：基坑支护结构；稳定性分析；数值模拟
ABSTRACT
With the acceleration of urbanization and the in-depth development of underground space, foundation pit engineering has been playing an increasingly important role in architectural construction. The stability of foundation pit support structures directly affects construction safety and the protection of the surrounding environment. Therefore, systematic research on the stability analysis and safety control technology of foundation pit support structures holds significant theoretical importance and engineering value. This study, based on typical foundation pit projects, combined numerical simulation, field monitoring, and theoretical analysis to thoroughly investigate the mechanical characteristics and influencing factors of foundation pit support structures, while proposing targeted safety control technologies. Specifically, a three-dimensional numerical model of the foundation pit support structure was established using the finite element method to analyze deformation patterns and stress distribution characteristics under various working conditions. Furthermore, long-term field monitoring was conducted based on actual engineering cases, obtaining critical data such as displacements and internal force changes of the support structure, which were compared with numerical simulation results to ensure the reliability of the conclusions. In response to deficiencies in traditional design methods, an improved limit equilibrium method was introduced to optimize the design parameters of the foundation pit support structure. Finally, a comprehensive safety control technology system for foundation pit construction was proposed, including real-time early warning mechanisms and dynamic adjustment strategies. The study demonstrated that this technical system significantly enhances the stability of foundation pit support structures and reduces construction risks. The innovation of this research lies in the organic combination of numerical simulation and field monitoring, revealing the stability mechanism of foundation pit support structures under complex conditions and providing scientific evidence and practical guidance for similar projects. The main contributions include the improvement of design theories for foundation pit support structures, the promotion of relevant technical standards, and the provision of new approaches for safety management in underground construction projects.
Keywords: Pit Support Structure; Stability Analysis; Numerical Simulation
目 录
摘 要 I
ABSTRACT II
第1章 绪论 1
1.1 基坑支护结构研究背景与意义 1
1.2 国内外研究现状分析 1
1.3 本文研究方法与技术路线 2
第2章 基坑支护结构稳定性理论基础 3
2.1 稳定性分析的基本概念 3
2.2 支护结构受力特性研究 3
2.3 土体力学参数对稳定性的影响 4
2.4 数值模拟方法在稳定性分析中的应用 4
第3章 基坑支护结构设计与安全性评估 6
3.1 支护结构设计原则与规范要求 6
3.2 不同类型支护结构的适用条件 6
3.3 安全性评估指标体系构建 7
3.4 风险因素识别与控制策略 7
第4章 基坑施工过程中的安全控制技术 9
4.1 施工阶段稳定性监测技术 9
4.2 变形控制与预警机制研究 9
4.3 特殊地质条件下安全控制措施 10
4.4 新型材料与工艺在安全控制中的应用 10
结论 12
参考文献 13
致 谢 14
