DG水电站坝址区断层渗流数值模拟研究  

Numerical Simulation of Fault Seepage in DG Hydropower Station

作　　者：张泽坤[1] 王潇弘 孙兴伟 孙红月[1] 沈佳轶[1] Zhang Zekun;Wang Xiaohong;Sun Xingwei;Sun Hongyue;Shen Jiayi(Zhejiang University Ocean College,Zhoushan Zhejiang 316021,China;Hydro-china Huadong Engineering Co.,Ltd,Hangzhou 310007,China;Department of Civil Engineering,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学海洋学院,浙江舟山316021 [2]中国电建集团华东勘测设计研究院有限公司,杭州311100 [3]浙江大学建筑工程学院,杭州31005

出　　处：《科技通报》2022年第7期13-18,共6页Bulletin of Science and Technology

摘　　要：断层是水利水电工程建设中经常遇到的地质问题,断层处可能会受渗流影响发生渗透破坏。本文采用有限元数值模拟方法,建立DG水电站坝址区有限元模型,开展无防渗帷幕与施加防渗帷幕工况下断层处的渗流场研究。结果表明:通过对压水试验的模拟,所得的压水试验模拟值与现场试验值十分接近,模拟结果对实际工程具有参考价值;断层未施加防渗措施时,3种不同库水位下,断层处的最大水力梯度均大于1,断层在蓄水后可能发生渗透破坏;采用防渗帷幕对断层进行治理后,与未施加防渗措施相比,断层处最大水力梯度、渗流量与渗流速度发生明显降低。研究成果可为断层处的防渗处理提供参考依据。Fault is a kind of unfavorable geological structure,which brings many problems to the construction of water conservancy facilities.The fault may be damaged by seepage.In this paper,a numerical model is established to study the permeability characteristic of DG hydropower station,and the seepage field at the fault under the conditions of no anti-seepage curtain and with anti-seepage curtain is studied.The results of this paper are as follows:through the numerical simulation,find the value of simulation of the water pressure test very close to the field test value.This prove the simulation results is reliabled;In different water levels,the hydraulic gradients of Ffault are greater than 1,the fault may occure seepage damage;After the fault is treated with anti-seepage curtain,compared with no anti-seepage measures,permeability parameters of fault are obvious reduction.The research results can provide guidance for the anti-seepage treatment at the fault.

关 键 词：渗流 断层 防渗帷幕 ABAQUS 数值模拟 水力梯度 

分 类 号：TV697.32[水利工程—水利水电工程]