高压旋喷锚索与灌注桩支护结构三维数值分析  

Three Dimensional Numerical Analysis of the Supporting Structure of High Pressure Jet-Grouting Cable and Bored Pile Wall Based on FLAC^(3D)

作　　者：彭超[1] 余建民[1] PENG Chao;YU Jianmin(School of Resources and Environment, North China University of Water Resources and Electric Power, Zhengzhou, He,nan 450045, China)

机构地区：[1]华北水利水电大学资源与环境学院,河南郑州450045

出　　处：《水利与建筑工程学报》2018年第1期194-197,206,共5页Journal of Water Resources and Architectural Engineering

摘　　要：为了研究高压旋喷锚索与灌注桩支护结构在深基坑工程中的工作性状,利用三维快速拉格朗日方法(FLAC^(3D))对郑州市某主要采用桩锚支护形式的深基坑工程的开挖支护进行了三维动态模拟分析,得到了基坑开挖过程中高压旋喷锚索的受力,灌注桩围护体的变形,基坑外土体的水平位移和基坑外土体的沉降变形规律。除了在坑外沉降变形方面,摩尔-库仑模型的计算结果始终为较大的回弹变形,其他与已有文献的经验性规律基本吻合,且结构安全性和稳定性满足规范要求。分析结果可为以后该地区类似的高压旋喷锚索与灌注桩支护结构的设计施工应用提供参考。In order to analyze the behavior of the supporting structure of high pressure jet grouting anchor and bored pile wall in deep foundation pit,Fast Lagrangian Analysis of Continua in3Dimensions(FLAC3D)was employed to investigate the defomiation characteristics of a staged excavated and supported foundation pit of which the piles and anchors were adopted as the primary supporting structure in Zhengzhou City.The change of high pressure jet grouting cable,the de-flection of bored pile walls,the settlement of ground surface,and the movement of the deep strata outside the excavation were analyzed which are basically consistent with the empirical ones from the existing literatures except the settlement of ground surface.And structural safety and stability meet the standard requirements.The numerical results provide a useful reference for the design and construction of similar deep excavation projects in the future.

关 键 词：深基坑 三维快速拉格朗日方法 高压旋喷锚索 桩锚支护 

分 类 号：TU433[建筑科学—岩土工程]