FLAC^(3D)的深基坑支护方式的模拟对比分析  

Simulation and analysis on deep foundation pit by FLAC^(3D)

作　　者：徐凌[1] 陈格际 刘帅 

机构地区：[1]辽宁科技大学土木工程学院,辽宁鞍山114051 [2]辽宁省冶金地质勘查局403队,辽宁鞍山114021

出　　处：《辽宁工程技术大学学报（自然科学版）》2016年第11期1279-1283,共5页Journal of Liaoning Technical University (Natural Science)

基　　金：国家科技支撑项目(2012BAJ11B02-11)

摘　　要：为解决某深基坑不同支护方式的选择问题,为基坑工程设计与计算提供参考依据,运用岩土工程软件FLAC3D对某深基坑工程不同支护方式开挖过程中地表和围护结构变形安全性问题进行研究.研究结果表明:在内撑式排桩支护下FLAC3D数值模拟得到的地表和围护结构最大位移值分别是22 mm和20 mm,而在桩锚支护下地表和围护结构最大位移值是30 mm和25 mm.该深基坑工程采用内撑式排桩支护和桩锚支护都能够有效地抵抗基坑土体的位移,减小围护结构的水平位移,但内撑式排桩支护效果更好.In order to solve a reasonable support method for a deep foundation pit and provide reference basis for foundation pit engineering design and calculation, the excavation simulation was conducted with security issues of support method for internal brace deep foundation pit supporting pile excavation surface and deformation of retaining structure by adopting the software of FLAC3D. The results of study show that the maximum displacement of retaining structures and surface under internal bracing row-piles is 22 mm and 20 mm by FALC3D. But under pile anchor support the maximum displacement of retaining structures and surface is 30 mm and 25 mm. The internal brace pile and pile anchor support for the deep foundation pit engineering can effectively resist soil displacement of foundation pit, reduce the horizontal displacement of retaining structure, but staying inside the pile supporting effect is better.

关 键 词：深基坑工程 数值模拟 水平位移 地表沉降 内撑式排桩支护 桩锚支护 

分 类 号：TU470[建筑科学—结构工程]