斜抛撑与水平撑在深基坑支护中控制变形的对比分析  

Comparative Analysis on Deformation Control in Diagonal and Horizontal Bracing for Deep Excavation Support

作　　者：赵园园 左人宇 陆钊 翟东格[2] 

机构地区：[1]深圳市工勘岩土集团有限公司岩土工程设计所,广东深圳518026 [2]哈尔滨工业大学深圳研究生院深圳市城市与土木工程防灾减灾重点实验室,广东深圳518055

出　　处：《路基工程》2015年第3期136-139,143,共5页Subgrade Engineering

基　　金：深圳市科技研发资金项目(CXZZ20120829154820942)

摘　　要：在目前的实际工程应用中,深大基坑的开挖支护内支撑体系主要有水平撑和斜抛撑两种形式。为此,对支撑桩加承台的斜抛撑形式通过大型通用有限元软件ABAQUS对其在深大基坑中的应用进行模拟,并与水平撑在深大基坑中的数值模拟结果进行对比分析。通过比较两种不同的内支撑体系对开挖深大基坑的基坑外地表面土体沉降、基坑底部土体隆起及围护桩的水平位移不同变化情况,得出支撑桩加承台的斜抛撑支护体系在控制围护桩水平位移和基坑外地表面土体沉降的优点及控制效果。It is known that, in practice, there are horizontal and diagonal bracing applied mainly in deep excavation support system. In this paper, the application of diagonal bracing which has support pile with cap in deep excavation was simulated by large general FEM software, ABAQUS, and then comparative analysis was made with the result from numerical simulation of horizontal bracing. For these two inner support systems, through comparison between the changes of the ground settlement, bottom heave and horizontal displacement of fender piles outside the excavated deep foundation pit, the advantages and effect of the diagonal bracing system of support pile and cap on control of horizontal displacement of the fender piles and ground settlement outside the pit, were concluded.

关 键 词：水平支撑 斜抛撑 地表沉降 支护桩 水平位移 基坑坑底隆起 

分 类 号：TU433[建筑科学—岩土工程]