灰岩和水泥改良花岗岩风化土力学性能研究  

Study on Mechanical Properties of Limestone and Cement-amended Granite Weathered Soils

作　　者：陈卫来 张恩 宋晶 CHEN Weilai;ZHANG En;SONG Jing(School of Earth Science and Engineering,Sun Yat-Sen University,Zhuhai 519082,Guangdong,China;Guangdong Key Laboratory of Geological Processes and Mineral Resources Exploration,Zhuhai 519082,Guangdong,China)

机构地区：[1]中山大学地球科学与工程学院,广东珠海519082 [2]广东地质过程与矿产资源勘查重点实验室,广东珠海519082

出　　处：《路基工程》2025年第1期55-62,共8页Subgrade Engineering

基　　金：国家自然基金资助项目:吹填淤泥多物质多尺度三维结构的固结演化机制及其定量表征(41877228)。

摘　　要：选用灰岩和水泥作为改良剂,通过单掺和复掺的方式对清远地区花岗岩强(全)风化土进行改良研究。结果表明:掺入灰岩会减小土体的黏聚力,提高干密度和内摩擦角,最佳掺量为20%;掺入水泥能大幅增强土体的各项力学性能,最佳掺量为6%;复掺灰岩和水泥的改良方式能够达到最佳的改良效果,复掺6%水泥和20%灰岩时,土体的抗压强度和抗剪强度均达到最大值,且土体遭受破坏时变形量最小。Limestone and cement were chosen as the modifiers to improve the strongly(fully)weathered granite soils in Qingyuan area by single mixing and double mixing.The results show that:mixing limestone will reduce the cohesion of the soil,increase the dry density and internal friction angle,the optimal mixing amount is 20%;mixing cement can greatly enhance the mechanical properties of the soil,the optimal mixing amount is 6%;mixing limestone and cement can achieve the best effect of improvement,when mixing 6%of cement and 20%of limestone,the compression strength and shear strength of the soil body have reached the maximum,and the deformation of the soil body suffered the minimum damage,which is the best solution to the problem.

关 键 词：花岗岩风化土 灰岩 水泥 无侧限抗压强度 黏聚力 内摩擦角 

分 类 号：U416.217[交通运输工程—道路与铁道工程]