摘要
郑东新区引黄灌溉调蓄池(龙湖)的地质条件复杂,部分地区为透水或强透水层,存在渗漏和水下开挖问题。针对这种情况,制定了3种开挖与防渗方案,方案一为水下开挖,水中抛填土,壤土铺盖防渗;方案二为抽水干法开挖,干地铺土碾压,壤土铺盖防渗;方案三为防渗墙截水干法开挖,综合防渗。通过对3种方案进行优化比选,方案三工程投资少,施工质量容易保证,施工期不会造成湖周围地下水水位下降、地层结构变化等新的地质环境问题,工程风险较小,推荐方案三为工程施工方案。
The Yellow River irrigation storage pond named Longhu lake in the new area of eastern part of Zhengzhou City is in complex geological conditions,some areas are of permeable or strong permeable layer,and there exists problems of leakage and underwater excavation.In view of this situation,we developed three kinds of schemes： the first is excavating underwater,throwing filling in the water and bedding loam for impervious;the second is excavating in the water pumped dry,spreading soil in the dry and compacting with bedding loam for impervious;the third is excavating in dry for the water cut by diaphragm wall,and preventing leakage comprehensive.Through the analysis of three programs and their optimized selection,the third scheme was selected for less project investment,easy to guarantee construction quality,and construction period will not cause the lake surrounding groundwater level drop,stratum structure change and new problems of geological environment as well meanwhile,engineering risk is small.
出处
《人民黄河》
CAS
北大核心
2013年第1期109-111,共3页
Yellow River
关键词
强透水地基
开挖
防渗
龙湖
serious water permeability foundation
excavation
seepage
Longhu Lake
