摘 要
随着城市地下空间开发的不断推进，基坑支护结构的安全性与经济性日益受到关注。传统支护体系在复杂地质条件下常面临变形控制难、施工效率低等问题，亟需新型支护结构的创新与研究。本研究旨在提出一种具有高承载性能与良好变形协调能力的新型组合支护结构，并系统分析其力学特性。通过现场试验、数值模拟与理论分析相结合的方法，探讨该结构在不同工况下的受力机制与变形特征。研究结果表明，新型支护结构在侧向土压力作用下表现出更优的抗变形能力和内力分布特性，显著提升了支护体系的整体稳定性。本研究的创新点在于提出了结构形式与施工工艺的协同优化方案，为复杂环境下深基坑工程的设计与实施提供了新的技术路径和理论支持。
关键词：新型组合支护结构；深基坑工程；变形协调能力Abstract：With the continuous advancement of urban underground space development, increasing attention has been paid to the safety and economic efficiency of foundation pit support structures. Traditional support systems often face challenges such as difficulty in deformation control and low construction efficiency under complex geological conditions, necessitating innovation and research into new types of support structures. This study aims to propose a novel composite support structure with high load-bearing capacity and favorable deformation coordination ability, and to systematically analyze its mechanical characteristics. By integrating field testing, numerical simulation, and theoretical analysis, the mechanical behavior and deformation features of the structure under various working conditions are investigated. The results indicate that the new support structure exhibits superior resistance to deformation and a more favorable internal force distribution under lateral earth pressure, significantly enhancing the overall stability of the support system. The innovation of this study lies in the proposal of a coordinated optimization strategy for structural configuration and construction methodology, providing new technical pathways and theoretical support for the design and implementation of deep foundation pit projects in complex environments.
Key Words：New Combined Support Structure；Deep Foundation Pit Engineering；Deformation Coordination Capacity
