桩锚支护结构中两种管井降水方法的对比分析  

Comparative analysis of two kinds of well dewatering methods in support structure of piles with anchor cables

作　　者：周勇[1,2] 王正振[1,2] 

机构地区：[1]兰州理工大学甘肃省土木工程防灾减灾重点实验室,甘肃兰州730050 [2]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050

出　　处：《兰州理工大学学报》2016年第4期115-120,共6页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51568042)

摘　　要：基坑桩锚支护结构中采用管井降水时有两种方法,一是将地下水降到基坑底面以下,但在排桩嵌固端以上;二是将地下水降到排桩嵌固端以下,本文中从整体稳定性和基坑工程造价两方面对比分析该两种方法.分析结果表明将地下水位降到排桩嵌固端以下不仅安全而且经济.通过张掖某深基坑工程实例,对上述分析结果进行验证.建议以后类似工程中采用第二种降水方法.There are two methods for well dewatering in supporting structure of piles with anchor cables, one being dropping the groundwater below foundation pit bottom, but above constraint end of piles and the other being dropping the groundwater below constraint end of piles. In this paper, the two methods are compared and analyzed from the following aspects： the global stability and the cost of the excavation engineering. The analysis result shows that dropping the groundwater below constraint end of piles will be not only safe but also economical. Taking a deep excavation project in Zhangye as an example to verify the result of the above analysis It is advised that the second method of dewatering should be used in similar projects.

关 键 词：深基坑 支档结构 桩锚支护结构 地下水 管井降水 

分 类 号：TU473.3[建筑科学—结构工程]