防渗帷幕深度对重力坝稳定的影响研究

Study on the Stability of Gravity Dam under Anti-seepage Curtain Depth

本文主要根据拟定的重力坝结构和工况,针对防渗帷幕深度对坝基渗流的影响展开分析,利用GEO-sudio软件中seep模块计算重力坝扬压力,初步研究坝基的渗流,计算在不同设定工况下的坝体抗滑稳定性,找出随着帷幕深度的改变对安全系数变化规律的影响,并最终确立一种有利于坝体稳定合理有效的帷幕形式。计算结果表明坝体抗滑稳定安全系数是随着防渗帷幕的深度增大而呈逐渐增大的趋势。

According to the gravity dam structure and operating condition,analysis the curtain of seepage depth influence on the dam foundation seepage.Using GEO-sudio software seep module calculate the uplift pressure of gravity dam in order to study the dam foundation seepage.Caculate the stability of a dam in different setted operating condition,then find out the impact that the range regular of the safety coefficient varies from the depth of an anti-seepage curtain depth,eventually establish a reasonable and effective anti-seepage curtain form which is beneficial for the dam stability.The calculation results show that the deeper anti-seepage curtain the higher stability safety factor coefficient.