下蜀土导热系数与电阻率和剪切波速关系模型试验研究  

Experimental Study on Relationship between Thermal Conductivity,Resisitivity and Shear Wave Velocity of Xiashu Loess

作　　者：刘洋 张丹[1] 桑宏伟 周殷康 阎长虹[1,2] LIU Yang;ZHANG Dan;SANG Hongwei;ZHOU Yinkang;YAN Changhong(School of Earth Science and Engineering,Nanjing University,Nanjing 210093,China;Nanjing University Jinling College,Nanjing 210089,China)

机构地区：[1]南京大学地球科学与工程学院,江苏南京210093 [2]南京大学金陵学院,江苏南京210089

出　　处：《防灾减灾工程学报》2020年第3期453-459,共7页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金项目(41572271);江苏省自然科学基金项目(BK20161239)资助。

摘　　要：针对导热系数现场难以快速、准确测试的问题,以下蜀土为研究对象,建立了依据电阻率和剪切波速估算导热系数的关系模型。分别采用HC-110热导测试仪、四极法和弯曲元测试系统对20℃、含水率为10%~21%、干密度为1.5~1.8 g/cm^3下蜀土的导热系数、电阻率和剪切波速进行了测试,得到了三者与含水率和干密度之间函数关系,建立了导热系数与电阻率和剪切波速的关系模型,经检验,该关系模型拟合度高,为工程实践中利用电阻率和剪切波速快速确定土体导热系数提供了新的方法。In view of the difficulty of rapid and accurate testing of the thermal conductivity at the site,rammed soils were used in this study,and a relational model for estimating thermal conductivity based on resistivity and shear wave velocity was established.The HC-110 thermal conductivity tester,quadrupole method and bending element test system respectively used for the thermal conductivity of soil at 20℃,water content between 10%-21%,and dry density between 1.5 and 1.8 g/cm^3.The resistivity and shear wave velocity were tested and the relationship between the moisture content and the dry density was obtained.The relationship between thermal conductivity,resistivity and shear wave velocity was established.After testing,the relational model has a high degree of fitness.It provides a new method for rapidly determining the thermal conductivity of soil using resistivity and shear wave velocity in engineering practice.

关 键 词：导热系数 电阻率 剪切波速 拟合 关系模型 

分 类 号：P642[天文地球—工程地质学]