VWD-A型沉降计在地铁基坑开挖墙后土体沉降与墙体侧移的响应研究  

Numerical study on VWD-A soil settlement gauge response to ground surface settlement and lateral displacement of wall caused by metro excavations

作　　者：石振奇 

机构地区：[1]新疆铁道勘察设计院有限公司

出　　处：《自动化与仪器仪表》2016年第6期5-7,10,共4页Automation & Instrumentation

摘　　要：基坑墙后地表沉降S与围护结构的变形D密切相关,但其定量关系尚不明确。研究确定S-D的定量关系后,可以通过围护结构的侧移来预测墙后地表的沉降。本文采用数值模拟及参数分析的方法,建立了59个三维有限元数值模型,研究了不同地铁基坑几何参数,并在实际工程应用中采用VWD-A型振弦式土体沉降计进行了地表沉降测量,并与模拟分析数据进行了对比,结果表明基于所建立的S-D定量关系预测的墙后地表沉降和实测值吻合度较高。It indicates that ground surface settlement S may be closely related to lateral displacement of wall D in foundation pits for the previous research. However,the quantitative relationship between S and D is uncertain. Once this quantitative relationship is determined,ground surface settlement can be predicted by using lateral displacement of wall. In this paper,59 three-dimensional finite element models are established. Numerical simulation and parameter analyses are performed to investigate the effects of the geometric parameters.The VWD-A Vibrating Wire soil settlement gauges were used in measuring ground surface settlement and results were compared to the simulation data. The comparison results show that quantitative relationship between S and D indicatest an overall good performance by the prediction method.

关 键 词：基坑 有限元 墙体侧移 地表沉降 VWD-A型土体沉降计 

分 类 号：TU354[建筑科学—结构工程]