摘要
珠江三角洲水资源配置工程工作井基坑深、数量多,分布于大型城市。基坑在开挖过程中,普遍出现大幅度地下水位下降和地表沉降。结合某基坑安全监测数据,分析研究了部分监测项目的变化规律,结果表明,深基坑连续墙底部的沉渣层是防渗结构的薄弱环节,内外高水头差形成的渗透压力穿透连续墙底部的沉渣层,会直接和间接导致大幅度地下水位下降和地表沉降,甚至连续墙整体沉降。介绍了相应的防控措施,为类似工程提供参考。
The deep foundation pit of the water resources allocation project in the Pearl River Delta are characterized by largr quantities,closed to the large city.Significant groundwater level drop and surface subsidence often happen during the excavation.Changes of some moni‐toring items were researched in this article in combination with safety monitoring data.The results indicate that the sediment layer at the bot‐tom of the diaphragm wall is the weak link of anti-seepage structure,which can lead to significant groundwater table drop and surface sub‐sidence,even overall settlement of diaphragm wall.The prevention and control measures are introduced in this article.It is expected to pro‐vide reference for similar projects.
作者
秦朋
李福庆
谭勇
牛广利
田亚岭
QIN Peng;LI Fuqing;TAN Yong;NIU Guangli;TIAN Yaling(Changjiang River Scientific Research Institute Wuhan 430010,China;Research Center on Water Engineering Safety and Disaster Prevention of MWR Wuhan 430010,China;National Dam Safety Engineering Technology Research Center Wuhan 430010,China;China Tunnel Construction Co.,Ltd.Guangdong Guangzhou 510800,China)
出处
《广东土木与建筑》
2021年第10期79-82,90,共5页
Guangdong Architecture Civil Engineering
基金
国家重点研发计划资助项目(2018YFC0407101)
长江科学院中央级公益性科研院所基本科研业务项目(CKSF2019394/GC)。
关键词
珠三角工程
工作井基坑
安全监测
防控措施
water resources allocation project in the Pearl River
work well poundation pit
safety monitoring
the prevention and con‐trol measures
