静力触探对水泥土加固体质量检测的试验研究  

Experimental Research on Quality Assessment of Cemented Soils Using Cone Penetration Test

作　　者：董伟明 刘见生 DONG Weiming;LIU Jiansheng(Division of Capital Construction,Tongji University,Shanghai 200092,China;Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学基建处,上海200092 [2]同济大学土木工程学院地下建筑与工程系,上海200092

出　　处：《结构工程师》2025年第1期92-101,共10页Structural Engineers

摘　　要：水泥土搅拌桩的成桩质量检测始终是工程界一个具有争议性的话题。为建立更加合理的水泥土加固体质量评价体系,基于对现有研究成果和常用检测评价方法的对比,提出以静力触探试验为主、取芯强度试验为辅的快速评价方法,并基于上海地区土体加固工程,对水泥土比贯入阻力与取芯抗压强度的对应关系进行了试验研究。结果表明:超过90%的水泥土桩静力触探曲线的比贯入阻力变异系数低于40%,该系数可作为桩身搅拌均匀性的定量评价指标;上海地区水泥土静力触探的比贯入阻力与取芯抗压强度之间存在明确的分段线性换算关系,且经过室内试验验证,计算误差在13%左右。在此基础上,提出上海地区水泥土加固体的快速质量检测评价方法。The quality assessment of cement mixing piles has always been a controversial topic in the engineering field.To establish a more reasonable quality evaluation system for cemented soils,a rapid quality assessment method is proposed based on a comparison of existing research results and commonly used quality assessment methods.This method primarily utilizes cone penetration test(CPT)supplemented by core sampling strength test.Based on soil reinforcement projects in Shanghai,an experimental study was conducted on the relationship between the specific penetration resistance of cemented soil and the unconfined compressive strength(UCS)of the cores.The results indicate over 90%of the coefficients of variation of specific penetration resistance of cement mixing piles were found to be below 40%,which can serve as a quantitative evaluation index for the uniformity of piles.A clear segmented linear conversion relationship between the two parameters in the Shanghai area.This relationship was validated through indoor chamber tests,with a calculation error of about 13%A rapid quality assessment method for cemented soils in the Shanghai area is proposed.

关 键 词：水泥土 质量检测 静力触探 比贯入阻力 

分 类 号：TU473.14[建筑科学—结构工程]