工程废弃泥浆固化土路用性能研究  

Study on road performance of solidified soil with engineering waste sludge

作　　者：金茂祥 黄志坚 JIN Maoxiang;HUANG Zhijian(Shaoxing Traffic Engineering Management Center,Shaoxing 312000,Zhejiang,China;Research Center of Coastal and Urban Geotechnical Engineering,Zhejiang University,Hangzhou 310058,Zhejiang,China)

机构地区：[1]绍兴市交通工程管理中心,浙江绍兴312000 [2]浙江大学滨海与城市岩土工程研究中心,浙江杭州310058

出　　处：《地基处理》2025年第1期83-89,共7页Journal of Ground Improvement

摘　　要：为研究废弃泥浆固化土在填筑路基时的路用性能,本文通过室内试验和现场测试对其强度、压实度和回弹模量等特性进行了评估。以杭州某高速公路路基填筑工程为依托,通过现场测试,在不同含水率和压实次数下对废弃泥浆固化土路基的填料压实度和CBR值等进行了测试分析。随后,通过室内静动力试验,对固化土路基在环境干湿循环效应下的强度进行了分析,并研究了循环荷载下固化土路基的回弹模量变化,综合评估其路用性能。研究结果表明:当泥浆固化土添加4%水泥和4%石灰时,其压实度可以控制在96%以上,CBR为9%~10%;在环境干湿循环效应下,固化土的无侧限抗压强度先迅速下降后趋于稳定,在10次干湿循环后强度为0.60 MPa,满足一级公路指标要求;在96%压实度下,固化土路基回弹模量能达到156 MPa以上,且路基干湿循环效应对回弹模量影响较小,其回弹模量满足路基设计要求。To investigate the road performance of solidified sludge as a subgrade fill material,this study conducted laboratory experiments and field tests to assess its strength,compaction characteristics,and resilient modulus.By focusing on a highway subgrade filling project in Hangzhou,on-site tests were employed to analyze the compaction degree and CBR value of the solidified sludge subgrade under various water contents and vibration times.Subsequently,laboratory static-dynamic tests were conducted to analyze the strength of the solidified soil subgrade under dry-wet cyclic effects.Additionally,the changes in resilient modulus of the solidified soil subgrade under cyclic loading were investigated to provide a comprehensive evaluation of its road performance.The findings reveal that the addition of 4%cement and 4%lime achieves a compaction degree exceeding 96%and a CBR of 9%~10%in solidified sludge.Moreover,under environmental dry-wet cycles,the unconfined compressive strength of the solidified soil initially experiences rapid decline before stabilizing.After ten dry-wet cycles,its strength reaches 0.60 MPa,meeting the requirements of first-grade highway specifications.Furthermore,at 96%compaction degree,the resilient modulus of the solidified soil subgrade exceeds 156 MPa,with minimal impact from dry-wet cycles.Consequently,the resilient modulus satisfies the design criteria for the subgrade.

关 键 词：固化土 路用性能 循环荷载 回弹模量 干湿循环 CBR 

分 类 号：U416[交通运输工程—道路与铁道工程]