临库超深盾构工作井施工运行期渗控措施效果研究  

Study on the Effect of Seepage Control Measures During Construction and Operation of Ultra-deep Shield Working Well Near Reservoirs

作　　者：吴穹 罗来辉 范越 崔皓东[2] 傅兴安 WU Qiong;LUO Lai-hui;FAN Yue;CUI Hao-dong;FU Xing-an(Shenzhen Raw Water Co.,Ltd.,Shenzhen 518000,China;Changjiang River Scientific Research Institute,Wuhan 430010,China;Changjiang Survey,Planning,Design and Research Co.,Ltd.,Wuhan 430010,China)

机构地区：[1]深圳市原水有限公司,广东深圳518000 [2]长江科学院,湖北武汉430010 [3]长江勘测规划设计研究有限责任公司,湖北武汉430010

出　　处：《水电能源科学》2024年第9期110-114,170,共6页Water Resources and Power

基　　金：中央级公益性科研院所基本科研业务费项目(CKSF2023306/YT)。

摘　　要：临库超深盾构工作井施工运行过程中的渗流安全问题重要且复杂。为此,以深圳公—清联通工程中临水库仅100 m的田茜工作井为例,构建了工程区三维渗流数值模拟模型,对施工运行期不同水位及渗控措施条件下的工程区渗流场分布和竖井基坑渗流量特征开展了系统分析,评价了竖井基坑渗流安全,并定量确定工作井施工运行对库坝渗流及周边地下水位的长期影响。结果表明,工作井运行期基坑渗流量对周边地下水流场影响很小;工作井周边花岗岩微新岩体的渗透系数对基坑渗流计算结果影响很大;工作井的施工和运行对大坝渗流安全有利。研究结果为临库超深盾构工作井的渗流分析和渗控措施设计提供了良好的思路和范例。The seepage safety problem during the construction and operation of the ultra-deep shield working well near the reservoir is important and complicated.The Tianxi working well,which is only 100m away from the reservoir in Gongming-Qinglinjing Reservoir Linkage Project of Shenzhen,was taken as the research object.A three-dimensional seepage numerical simulation model of the project area was established to systematically analyze the seepage field distribution in the project area and the seepage volume characteristics of the foundation pit under the conditions of different water levels and seepage control measures during the construction and operation period.The seepage safety of the foundation pit was evaluated,and the long-term impact of the construction and operation of the working well on the seepage of the reservoir dam and the surrounding groundwater level was quantified.The results show that the seepage rate of foundation pit has little impact on the surrounding groundwater flow field during the operation period of working well.The permeability coefficient of the granite micro-new rock mass around the working well has a great impact on the seepage calculation results of the foundation pit.The construction and operation of the working well is beneficial to the seepage safety of the dam.This study can provide an good example for the seepage analysis and design of seepage control measures for the ultra-deep shield tunneling working well near the reservoir.

关 键 词：公—清联通工程 田茜工作井 渗流控制 数值模型 

分 类 号：TV551.41[水利工程—水利水电工程]