[1]宋倩云,徐国兴,王翠英.上海地区基坑地下水控制及真空混合管井的应用[J].湖北工业大学学报,2020,(1):64-68.
　SONG Qianyun,XU Guoxing,WANG Cuiying.Application of Foundation Pit Groundwater Control and Vacuum Mixing Pipe Well in Shanghai Area[J].,2020,(1):64-68.
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上海地区基坑地下水控制及真空混合管井的应用()
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《湖北工业大学学报》[ISSN:1003-4684/CN:42-1752/Z]

卷:
期数:
2020年第1期
页码:
64-68
栏目:
湖北工业大学学报
出版日期:
2020-02-28

文章信息/Info

Title:
Application of Foundation Pit Groundwater Control and Vacuum Mixing Pipe Well in Shanghai Area
文章编号:
1003-4684(2020)01-0064-05
作者:
宋倩云1;  徐国兴2;  王翠英1
1 湖北工业大学土木建筑与环境学院，湖北 武汉 430068；
2 湖北楚程岩土工程有限公司，湖北 武汉 430300
Author(s):
SONG Qianyun1; XU Guoxing2; WANG Cuiying1
1 School of Civil Engin.,Architecture and Environment,Hubei Univ.of Tech.,Wuhan 430068,China;
2 Hubei Chucheng Geotechnical Engineering co. LTD, Wuhan 430300, China
关键词:
真空混合管井; 地下水控制; 弱透水层; 微承压水
Keywords:
vacuum mixing tube well;  groundwater control;  weak aquifer;  micropressure water
分类号:
TU47
文献标志码:
A
摘要:
针对上海地区具有潜水及承压水，深基坑地下水控制时，通常布置疏干井及降压井，以疏干潜水及降低承压水水头的现象，引入“真空混合管井”，通过辅助真空，将降水井设计成疏干、降压混合井，既能排出潜水起疏干作用，又能降微承压水起降压作用。阐述了上海地区地下水控制理念，并采用全封闭式竖向帷幕+真空管井降水方法。以上海古北某基坑工程为例，建立基坑降水数值模型，利用Visual modflow软件，计算微承压降压井数量；真空混合管井74口，降压井4口。采用Visual modflow、天汉软件预测了降深及降水引起的地表沉降。水位监测结果：基坑内微承压水均在基坑底1.0 m以下，满足施工要求，基坑外水位为平缓状，有效控制了降水引起的地表沉降。该方法减少了微承压含水层内的降水井数量，效率提升。
Abstract:
In view of the diving and confined water in the Shanghai area, the groundwater control of deep foundation pits is usually arranged with dewatering wells and pressure-reducing wells to drain the diving and reduce the pressure head of the pressurized water, introducing a “vacuum mixing tube well” through the auxiliary vacuum. The design of the precipitation well is a dewatering and pressure-reducing mixing well, which can not only discharge the diving and dewatering, but also reduce the pressure of the micro-pressure water. The groundwater control concept in Shanghai is expounded, and the fully enclosed vertical curtain + vacuum tube well precipitation method is adopted. Taking a foundation pit project in Gubei of Shanghai as an example, a numerical model of foundation pit dewatering was established. The number of micro-pressure-reducing wells was calculated by Visual modflow software, with 74 vacuum mixing tube wells and 4 depressurization wells. Visual modflow and Tianhan software were used to predict surface subsidence caused by deepening and precipitation. According to the water level monitoring results, the micro-confined water in the foundation pit is below 1.0m at the bottom of the foundation pit, which meets the construction requirements. The water level outside the foundation pit is gentle, which effectively controls the surface settlement caused by precipitation. The method reduces the number of precipitation wells in the micro-pressure aquifer and improves the efficiency.

参考文献/References:

[1] 王忠凯,陈伟.真空混合管井降水技术研究与应用\[J\].人民长江,2016,47(22):6063,67.
\[2\] 肖瑞传,赖俊鹏,区穗辉，等.深厚复杂软土地层深基坑真空降水处理效果分析\[J\].广东土木与建筑,2018(3):3941.
\[3\] 苗旺,邹剑峰,詹志习，等.真空管井降水技术在深埋弱透水层中的应用研究\[J\].土工基础,2017,31(5):549553.
\[4\] 马祥,罗江波.地铁车站超深基坑工程大口径管井降水的设计与施工\[J\].施工技术,2012,41(13):1317.
\[5\] 张焕华,贾晓娟.辅助真空的深基坑深井降水技术及工程应用\[J\].煤炭工程,2003(11):3638.
\[6\] 范文超,蔡新.新型集成管井降水强夯法处理冲填土地基试验研究\[J\].施工技术,2017,46(20):4953.
\[7\] 黄峰.真空管井降水机理研究\[D\].中国地质大学（北京）,2014.
\[8\] 姚天强,石振华.基坑降水手册\[M\].北京：中国建筑工业出版社,2006.

备注/Memo

备注/Memo:
［收稿日期］ 2019-09-02
［第一作者］ 宋倩云(1997-)， 女，湖北潜江人，湖北工业大学硕士研究生，研究方向为深基坑工程
［通信作者］ 王翠英(1965-)， 女，内蒙古包头人，湖北工业大学教授，研究方向为深基坑工程
更新日期/Last Update: 2020-04-11