复合型土钉黄土基坑数值分析

Numerical Analysis on Composite Soil Nail for Loess Foundation Pit

以某深基坑支护工程为背景,结合FLAC3D有限差分软件,建立了空间三维有限差分分析模型,对预应力锚索复合土钉支护结构施工进行了三维动态数值模拟,研究了在基坑分步开挖过程中,支护结构的水平位移、基坑周围的地表沉降、坑底隆起的空间分布情况,得到了一些对基坑工程设计和施工有工程实际意义的结论。本课题的研究成果可以为实际工程设计和施工提供参考,并对今后相关的数值模拟分析及其他研究具有参考价值。

Here,taking a supporting engineering for deep foundation pit as the background,the three-dimensional finite difference model is established combining with FLAC3D software,and the construction process of the supporting structure with prestressed anchor-cable composite soil nails is simulated numerically and dynamically.The three dimensional distribution of the bracing structure displacements,the surrounding soil settlement,and the heave of the foundation pit bottom in the gradual process of excavation is researched. The conclusions that are valuable for the design and construction of deep foundation engineering are obtained.The research results in this paper could provide references for the actual engineering design and construction, and have referent value for similar numerical simulation and analysis in the future.