Deformation Analysis In Deep Foundation Anchor Shoring

With the rapid development of economic construction, expanding urban underground space excavation stability requirements increasingly high, a lot of discrepancies pit structure supporting design and measured, resulting in pit accidents have occurred. Therefore, excavation engineering design theory, improve the technical level of construction excavation is the most urgent problem, development and improvement of Foundation engineering design theory has great significance to the construction of Excavations.This paper discusses the characteristics of the development process and research status of the pile anchor support, and then analyzes the interaction mechanism of pile anchor supporting structure and deformation characteristics, combined with a particular excavation Handan examples of its design calculations, use Lizheng software for each excavation earth pressure working conditions, displacement, shear,bending moment is calculated after the completion of excavation supporting design stability computations prove that the way support is feasible. Finally, the principles and characteristics of finite difference software FLAC 3D, and use the software to build three-dimensional numerical model using Mohr- Coulomb criterion to simulate the soil, using the anchor unit to simulate the bolt element to simulate pile supporting pile, the base pit excavation whole process of three-dimensional numerical simulation of the following main elements:(1) binding site engineering geological conditions, the establishment of three-dimensional numerical model and selecting appropriate bolt supporting piles and soil parameters.(2) simulation of the foundation pit displacement field, stress field distribution,bolt axial force the situation by force and distribution, forecasting, feasibility evaluation support program reliability.(4) By comparing the simulated and measured values, three-dimensional numerical simulation calculations verified.