Estimation of thermal conductivity of cemented sands using thermal network models

作     者：Wenbin Fei Guillermo A.Narsilio Wenbin Fei;Guillermo A.Narsilio

作者机构：Department of Infrastructure EngineeringThe University of MelbourneParkvilleAustralia 

出 版 物：《Journal of Rock Mechanics and Geotechnical Engineering》 (岩石力学与岩土工程学报（英文版）)

年 卷 期：2022年第14卷第1期

页      面：210-218页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0815[工学-水利工程] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：Project ARC DP210100433 

主　　题：Network Cementation Computed tomography Ground improvement Sands 

摘      要：Effective thermal conductivity of soils can be enhanced to achieve higher efficiencies in the operation of shallow geothermal *** cementation is a ground improvement technique that can increase the interparticle contact area,leading to a high effective thermal ***,cementation may occur at different locations in the soil matrix,*** contacts,evenly or unevenly around particles,in the pore space or a combination of *** topology of cementation at the particle scale and its influence on soil response have not been studied in detail to ***,soils are made of particles with different shapes,but the impact of particle shape on the cementation and the resulting change of effective thermal conductivity require further *** this work,three kinds of sands with different particle shapes were selected and cementation was formed either evenly around the particles,or along the direction parallel or perpendicular to that of heat *** effective thermal conductivity of each sample was computed using a thermal conductance network *** show that dry sand with more irregular particle shape and cemented along the heat transfer direction will lead to a more efficient thermal enhancement of the soil,i.e.a comparatively higher soil effective thermal conductivity.