复杂地质条件下水利工程高水位深基坑降排水施工方法研究
Research on the construction method for dewatering and drainage of high water level deep foundation pit in hydraulic engineering under complex geological conditions
陈政1
作者信息
- 1. 安徽省水利部淮委水利科学研究院,安徽合肥 230088
- 折叠
摘要
为了解决进口引江济淮工程施工中高水位深基坑降排水问题,对复杂地质条件下水利工程高水位深基坑降排水施工方法开展了研究.采用混凝土防渗墙技术对导向槽进行优化设计,提高防渗墙的防渗性能.利用真空预压地下水位测量方法为降水井的参数设计与位置设置提供水位参考.通过人工开挖探孔方式确定最佳降排水方案,并计算降水漏斗曲线的影响值.利用有限元软件模拟试验发现:该降排水方法在防渗墙高程为-36 m时能够达到最佳降排水效果,说明使用该方法能够阻隔基坑外水体渗入,且降水井能够将深基坑中的积水排出,有效地解决了进口引江济淮工程施工中高水位深基坑降排水难题,具有较好的实用性和推广价值.
Abstract
In order to solve the problem of high water level deep foundation pit drainage in the construction of the imported Yangtze River to Huaihe River project,a study on the construction method of high water level deep foundation pit drainage in hydraulic engineering under complex geological conditions is proposed.It adopted concrete anti-seepage wall technology to optimize the design of the guide groove and improve the anti-seepage performance of the anti-seepage wall.The use of vacuum preloading groundwater level meas-urement method provides water level reference for the design parameters and setting positions of precipita-tion wells.Then it determined the optimal dewatering and drainage plan through manual excavation of exploratory holes,and calculated the impact value of the dewatering funnel curve.Using finite element soft-ware simulation experiments,it was found that the dewatering and drainage method can reduce the poten-tial and seepage flow of deep foundation pits at an elevation of-36 m,indicating that this method can block the infiltration of water outside the foundation pit,and the dewatering well can discharge the accu-mulated water in the deep foundation pit.This effectively solves the problem of dewatering and drainage in high water level deep foundation pits during the construction of the imported Yangtze River to Huaihe River project,and has good practicality and promotion value.
关键词
复杂地质/水利工程/高水位深基坑/降排水/防渗墙/降水井Key words
Complex geology/Hydraulic engineering/High water level deep foundation pit/Draining water/Anti-seepage wall/Dewatering well引用本文复制引用
出版年
2024
NETL
NSTL
万方数据