基于热脉冲法的水电站坝体渗流检测试验及模拟

Test and Simulation of Seepage in Dam of Hydropower Station based on Thermal Pulse Method

土石坝作为一类常见的水工建筑物,其防渗安全性至关重要,因此需要一种能够实时监测坝体渗流的方法,热脉冲法通过在坝体中预埋探针来实现对坝体的检测。文章探究了试验和仿真模拟下的土壤阻流效果,验证了热脉冲法的精度和可靠性,重点计算了某心墙土石坝在一定库水水位下含水率的变化。结果表明:黏土心墙土石坝的阻流效果较壤土心墙土石坝理想,热脉冲法运用于土石坝的渗流检测能取得一定效果。

As a kind of common hydraulic structures,the seepage control safety of earth-rock dam is very important.Therefore,a method to monitor the seepage flow in the dam body in real time is needed.The thermal pulse method can detect the dam body by embedding probe in the dam body.This paper explores the effect of soil flow resistance under the test and simulation,verifies the accuracy and reliability of the heat pulse method,and focuses on calculating the change of water content of an earth-rock dam with core wall under a certain reservoir water level.The results show that the flow blocking effect of earth-rock dam with clay core wall is better than that of earth-rock dam with loam core wall,and the heat pulse method can achieve certain effect in the seepage detection of earth-rock dam.