三峡深水围堰及防渗墙基坑抽水阶段的数值分析

 主要介绍了三峡工程二期上游围堰在基坑抽水阶段堰体和防渗墙的应力应变分析研究的成果。研究成果表明，围堰在基坑抽水阶段，墙体变形规律正常，并且与现场实测值较接近；在设计正常蓄水位高程85.0 m下，上游墙的最大变位将达到67.4 cm，墙体应力在墙体实测强度范围之内，墙体应力水平小于1.0，表明墙体和堰体是稳定、安全的。

Numerical analysis on TGP's 2nd-stage cofferdam and impermeable wall during pumping water out of foundation pit

This paper introduces the research results on numerical analysis of stress strain of TGP's 2nd stage cofferdam and impermeable wall during pumping water from the foundation pit.The study results show that the displacement regularity of the wall body is normal during pumping water,and the calculated values approach to the observed data in site;Under the normal storage water level 85 m condition,the maximum displacement of upstream wall body will reach 67.4 cm,the stresses of the wall body are within the range of its actually measured strength,and its stress level is less than 1.0.So the wall and cofferdam bodies are stable and safe.