摘要
临水强透水地层总是伴随着高地下水的特点,对于该地层的基坑施工易造成许多危害和不利影响,因此需要采用帷幕和管井的防渗降水措施,目前对于帷幕和管井的防渗降水效果的评价方式仍处于探索阶段。利用ABAQUS有限元计算软件,分别对帷幕和管井作用下的基坑渗流特征进行研究,采用单宽渗流量、帷幕降水深度、边坡水位作为帷幕防渗效果的评价标准,采用管井流量和边坡水位作为管井降水效果的评价标准,对帷幕深度和帷幕距基坑的距离以及管井深度、管井间距和管井半径进行敏感性分析,并对帷幕管井共同作用下帷幕和管井的防渗降水效果进行分析,为船闸基坑工程中帷幕和管井的布置方案提供设计依据。
The strongly permeable stratum of waterfront is always accompanied by high groundwater characteristics,which is prone to cause many hazards and adverse effects on the construction of foundation pits in this stratum.It is necessary to use curtain and tube well seepage prevention and lowering measures.The evaluation methods of seepage prevention and lowering effects of curtain and tube well are still in the exploration stage.In this paper,ABAQUS finite element calculation software is used to research the seepage characteristics of the pit under the action of curtain and tube well respectively.Single-width seepage volume,curtain precipitation depth and slope water level are used to evaluate the curtain seepage control effect,and tube well flow rate and slope water level are used to evaluate tube well precipitation effect.Then sensitivity analysis is conducted on the curtain depth and distance of curtain from the pit, as well as the tube well depth, tube well spac⁃ing and tube well radius. In addition, the effect of curtain and tube well on seepage control and precipitation under the joint action of curtainand tube well is analyzed. The results can provide a design basis for the arrangement of curtain and tube well in the ship lock foundation pitproject.
作者
邹开明
张文侃
徐世濠
苏凯
ZOU Kai-ming;ZHANG Wen-kan;XU Shi-hao;SU Kai(Hunan Provincial Water Transportation Construction&lnvestment Group Co.,Ltd.,Changsha 410004,Hunan Province,China;State Key Laboratory of Water Resources Engineering and Management,Wuhan University,Wuhan 430072,Hubei Province,China;Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering,Ministry of Education,Wuhan University,Wuhan 430072,Hubei Province,China;Hubei Key Laboratory of Water System Science for Sponge City Construction(Wuhan University),Wuhan 430072,Hubei Province,China)
出处
《中国农村水利水电》
北大核心
2024年第7期150-156,共7页
China Rural Water and Hydropower
关键词
临水基坑
渗流模拟
帷幕防渗
管井降水
waterfront pit
seepage simulation
curtain seepage control
tube well precipitation
