电渗热固结处理顶管废弃泥浆的减量化研究  

Reduction Utilization of Waste Slurry Using Electro-Osmosis Thermal Consolidation

作　　者：王炳辉[1] 栾佶 张雷 金海晖[1] 张文博 Wang Binghui;Luan Ji;Zhang Lei;Jin Haihui;Zhang Wenbo(School of Civil Engineering and Architecture,Jiangsu University of Science and Technology,Zhenjiang,Jiangsu 212100,P.R.China;Institute of Geotechnical Engineering,Nanjing Tech University,Nanjing 211816,P.R.China)

机构地区：[1]江苏科技大学土木工程与建筑学院,江苏镇江212100 [2]南京工业大学岩土工程研究所,南京211816

出　　处：《地下空间与工程学报》2024年第2期507-517,共11页Chinese Journal of Underground Space and Engineering

基　　金：江苏省自然科学基金(BK20200996);中国博士后基金(2020M681566);国家自然科学基金(51978317);江苏省博士后科研资助计划项目(2021K493C)。

摘　　要：针对顶管废弃泥浆渗透性差、含水率高、承载力低等特点,采用电渗热固结法对其进行减量化研究,并探究不同温度条件下电渗热固结的处理效果。选取EKG电极板作为电极,分析在40℃、60℃、80℃等不同加热温度下,泥浆固化过程中的排水量、排水速率、温度、电流等参数的变化趋势,对比电渗热固结前后泥浆的物理力学特性变化。结果表明:电渗热固结能够有效促进泥浆的排水,提高固结效率,降低含水率,增强固化泥浆的承载力和抗剪强度;在其加热到一定程度时,裂缝进展过快,泥浆导电性减弱,加热效率降低,且加热的温度越高,加热效率越低;电渗热固结对顶管废弃泥浆减量化应用具有一定的有效性与可行性。本文的研究成果可为其实际工程应用提供借鉴与参考。Aiming at the characteristics of poor permeability,high water content and low bearing capacity of waste slurry exhibits,electro-osmosis thermal consolidation was proposed to be used for its reduction utilization,and different temperature conditions was explored to discuss the consolidation effects.The EKG electrode plate was selected as the electrode.The tendency of some parameters,such as displacement,water discharge rate,temperature and current during the consolidation process of the waste slurry at three different heating temperatures,including 40℃,60℃and 80℃were analyzed to compare the physical and mechanical properties before and after electroosmosis thermal consolidation.The results show that electro-osmosis thermal consolidation can effectively promote the drainage,improve consolidation efficiency,significantly reduce the water content,and enhance the bearing capacity and shear strength of the solidified waste slurry.However,when the slurry was heated to a certain degree,the crack progresses too fast,the conductivity of the slurry is weakened,and the heating efficiency is reduced.And with the higher heating temperature,the heating efficiency is lower.The electro-osmosis thermal consolidation has certain effectiveness and feasibility for the reduction utilization of waste slurry,and this research study will provide reference for practical engineering application.

关 键 词：电渗热固结 顶管废弃泥浆 温度 加热效率 含水率 

分 类 号：TU411.93[建筑科学—岩土工程]