Study on the Effect of Seepage Control Measures During Construction and Operation of Ultra-deep Shield Working Well Near Reservoirs
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 distribu-tion 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 reser-voir 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 re-sults 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 ul-tra-deep shield tunneling working well near the reservoir.
Gong-Qing Reservoir Connectivity ProjectTianxi work wellseepage controlnumerical model
万方数据
维普
