株洲航电枢纽二线船闸基坑渗流特征及工程措施

Seepage characteristics and engineering measures of foundation pit of second-line ship lock of Zhuzhou Navigation-Hydropower Junction

针对株洲航电枢纽二线船闸主体基坑渗漏问题,基于在基坑开挖现场对基槽的观察与检验工作,进行基坑渗漏原因分析。按含水介质和分布特征,划分基坑渗流类型。通过对渗流量和渗透变形的观测,分析各渗流类型的渗流特征和工程影响。根据渗流对基坑工程的影响程度,借鉴一线船闸基坑的设计、施工经验,采取不同的处理措施,保证基坑边坡的稳定,满足结构体对承载力和沉降的要求,为内河船闸工程地质勘察提供查明水文地质条件的思路。

Aiming at the leakage problem of the foundation pit of the second-line ship lock of Zhuzhou Navigation-Hydropower Junction,based on the observation and inspection work of the foundation pit on site,we analyze the cause of the leakage.According to the aquifer medium and their distribution characteristics,the type of foundation seepage is categorized.Through the observation of seepage flow and seepage deformation,the seepage characteristics and the influence on the foundation pit engineering of each seepage type are analyzed.Based on the influence degree of seepage on the foundation pit engineering,and referring to the design and construction experience of the first-line ship lock,different treatment measures are taken to meet the requirements of slope stability of the foundation pit and bearing capacity and settlement of the foundation.The work ideas for identification of hydrogeological conditions in the engineering geological survey could be referred by the inland ship lock project.