摘要
地下水位高于基坑开挖面时,一般采用明沟集水井明排、自流深井抽水等方式降水,均依靠地下水自身流动汇集,但弱透水性土层,地下水流动性差,以上方式往往效果不佳。相较之下,轻型井点降水利用抽真空形成的负压主动将地下水吸出,是一种更高效的降水方式。文章以基坑降水关键技术为背景,详细阐述了多级简易轻型井点的施工工艺和要点,为同类基坑降水困难的项目提供参考案例。
When the groundwater level is higher than the excavation face of the foundation pit,the generally used dewatering methods of open pumping with open channel,self-drainage deep well pumping,etc.rely on the flow of groundwater itself.However,for weak permeable soil layers and poor groundwater mobility,the above methods are often ineffective.In contrast,the light well point precipitation uses the negative pressure formed by the vacuum to actively draw out the groundwater,which is a more efficient precipitation method.This paper takes the key foundation pit dewatering technology as the background,and elaborates in detail on the construction process and key points of multi-level simple lightweight well points,providing referable cases for similar projects with difficulty in foundation pit dewatering.
作者
肖晨阳
苏秋阳
余育杰
张晓峰
刘洪根
Xiao Chenyang;Su Qiuyang;Yu Yujie;Zhang Xiaofeng;Liu Honggen
出处
《城市建筑》
2025年第S1期51-55,共5页
Urbanism and Architecture
基金
中建八局科技研发项目“基于新旧共生理念的地域特色景区(片区)建造关键技术研究与应用”(2024-3-21)
关键词
多级降水
轻型井点
弱透水性土层
黏质粉土
基坑降水
multistage precipitation
light well point
weakly permeable soil layer
clayey silt
foundation pit dewatering
