顶管淤泥改良道路底基层材料配方机理研究  

Formulation mechanism of bottom layer material for road improvement by top pipe sludge

作　　者：田红云 邓庆凯 孟文诚 邹纳川 董祎挈 陆海军 Tian Hongyun;Deng Qingkai;Meng Wencheng;Zou Nachuan;Dong Yiqie;Lu Haijun(China First Metallurgical Group Co.,Ltd.,Wuhan 430081,Hubei,China;School of Civil Engineering and Architecture,Wuhan Polytechnic University,Wuhan 430023,Hubei,China)

机构地区：[1]中国一冶集团有限公司,湖北武汉430081 [2]武汉轻工大学土木工程与建筑学院,湖北武汉430023

出　　处：《岩土工程技术》2025年第1期150-158,共9页Geotechnical Engineering Technique

基　　金：湖北省自然科学基金(2022CFA011,2023AFD214)。

摘　　要：顶管施工中会产生大量淤泥,且这些淤泥具有含水率高、稳定性差、颗粒分布不均匀等特点。淤泥固化技术是解决工程施工废弃物再利用的重要手段,为提升淤泥固结体强度,探究稳定化药剂高效配方,采用胶砂强度试验、无侧限抗压强度试验、X射线衍射分析、比表面及孔径分析试验、FTIR傅里叶红外光谱分析,检测稳定化药剂和固结体强度,探究固结体物质组成变化规律、内部孔隙度变化和微观结构中分子键的变化。结果表明:以建筑垃圾、磷石膏和矿渣作为原料,选出满足国内固废基用于道路底基层材料强度要求的配比(顶管淤泥∶建筑垃圾∶磷石膏∶矿渣=0.40∶0.55∶0.015∶0.052),养护28 d后试样的含水率为1.32%~2.89%,抗压强度为3.3~6.6 MPa。During pipe jacking construction,a large amount of silt will be generated,which has characteristics such as high moisture content,poor stability,and uneven particle distribution.Mud solidification technology is an important means for the reuse of construction waste.To improve the strength of mud consolidation and explore the efficient formula of stabilizing agents,sand strength tests,unconfined compressive strength tests,X-ray diffraction analysis,specific surface and pore size analysis tests,FTIR Fourier transform infrared spectroscopy analysis were used to detect the strength of stabilizing agents and consolidation bodies.The changes in the composition of consolidation bodies,internal porosity changes,and molecular bonds in the microstructure were studied.The results show that using construction waste,phosphogypsum,and slag as raw materials,a ratio(top pipe sludge:construction waste:phosphogypsum:slag=0.40:0.55:0.015:0.052)was selected to meet the strength requirements of domestic solid waste base materials for road subgrade.After 28 days of curing,the moisture content of the samples was 1.32%~2.89%,and the compressive strength was 3.3~6.6 MPa.

关 键 词：顶管淤泥 底基层材料 固化稳定化 抗压强度 孔隙结构 

分 类 号：TU99[建筑科学—市政工程]