基坑开挖受多种因素影响,容易导致支护结构破坏和基坑变形失稳。为此,基于搅拌桩复合土钉支护结构探究基坑的稳定性,明确复合支护结构的破坏形式,探讨影响基坑稳定性的因素,其稳定性主要受土层及支护结构参数影响;现有研究在影响因素敏感性方面尚有不足,多局限于单因素变化且控制其他因素恒定,针对影响基坑稳定性因素的敏感性研究,通过梳理正交试验法的基本原理和分析方法,可为深入开展基坑影响因素敏感性分析提供借鉴和参考,剖析不同因素对基坑稳定性的影响程度,为优化支护结构设计提供依据。The excavation of foundation pit is affected by many factors, which can easily lead to the destruction of supporting structure and the deformation and instability of foundation pit. Therefore, based on the mixed pile composite soil nailing support structure, the stability of the foundation pit is explored, the failure form of the composite support structure is defined, and the factors affecting the stability of the foundation pit are discussed. There are still deficiencies in the sensitivity of influencing factors in the existing research, which are mostly limited to the change of a single factor and the constant control of other factors. Aiming at the sensitivity research of factors affecting the stability of foundation pit, this paper combs the basic principle and analysis method of orthogonal test method, which can provide a reference for in-depth analysis of the sensitivity analysis of influencing factors of foundation pit and analyzes the influence degree of different factors on the stability of foundation pit. It provides the basis for optimizing the design of supporting structure.
