HAS土壤固化剂改性沙漠砂与砖红壤的无侧限抗压试验研究  

Unconfined Compression Test Research on Desert Sand and Latosol Modified by Using HAS Stabilizer

作　　者：蒋梦龙 陈力[2] 曹铭津 杨涛春[1] JIANG Menglong;CHEN Li;CAO Mingjin;YANG Taochun(School of Civil Engineering and Architecture,University of Jinan,Jinan 250022,Shandong,China;Engineering Research Center of Safety and Protection of Explosion and Impact of Ministry of Education,Southeast University,Nanjing 211189,Jiangsu,China)

机构地区：[1]济南大学土木建筑学院,山东济南250022 [2]东南大学爆炸安全防护教育部工程研究中心,江苏南京211189

出　　处：《济南大学学报(自然科学版)》2025年第2期238-244,共7页Journal of University of Jinan(Science and Technology)

基　　金：国家自然科学基金项目(51978166)。

摘　　要：为了阐明影响广泛分布于中国西北部与南部边疆地区的沙漠砂与砖红壤力学性能的关键参数,利用HAS土壤固化剂固化改性沙漠砂与砖红壤的力学性能,通过无侧限抗压试验研究不同含水率和密实度时HAS土壤固化剂掺量对沙漠砂与砖红壤无侧限抗压强度的影响。结果表明:沙漠砂与砖红壤的无侧限抗压强度均随着密实度的增大而增加,随着含水率的增大而先增大后减小;当沙漠砂的含水率、密实度分别为12%、100.0%时,沙漠砂的无侧限抗压强度为0.091 MPa,比未改变含水率与密实度的沙漠砂的无侧限抗压强度增大约97.4%;当固化改性沙漠砂的HAS土壤固化剂的质量分数为4%时,沙漠砂的无侧限抗压强度可达到极大值0.125 MPa,比未掺加HAS土壤固化剂的沙漠砂的无侧限抗压强度增大37.4%,沙漠砂无侧限抗压强度取得极大值的含水率、密实度、掺加HAS土壤固化剂的质量分数的最优组合为12%、100.0%、4%;当砖红壤的含水率、密实度分别为20%、100.0%时,砖红壤的无侧限抗压强度为0.243 MPa,比改变含水率与密实度的砖红壤的无侧限抗压强度增大约294%;当固化改性砖红壤的HAS土壤固化剂的质量分数为5%时,砖红壤的无侧限抗压强度可达到极大值0.303 MPa,比未掺加HAS土壤固化剂的砖红壤的无侧限抗压强度增大24.6%,砖红壤无侧限抗压强度取得极大值的含水率、密实度、掺加HAS土壤固化剂的质量分数的最优组合为20%、100.0%、5%。To elucidate key parameters affecting mechanical properties of desert sand and latosol widely distributed in northwestern and southern border areas of China,HAS stabilizer was used to cure and modify mechanical properties of desert sand and latosol.Influences of HAS stabilizer dosage on unconfined compression strengths of desert sand and latosol with different moisture contents and compactnesses were researched by using unconfined compression test.The results show that unconfined compression strengths of desert sand and latosol increase with the increase of compactness,and increase first and then decrease with the increase of moisture content.When the moisture content and the compactness of desert sand are respectively 12%and 100.0%,the unconfined compression strength of desert sand is 0.091 MPa,which is about 97.4%greater than that of desert sand without changing moisture content and compactness.When the optimum mass fraction of HAS stabilizer is 4%for curing and modification of desert sand,the unconfined compression strength of desert sand can reach a maximum value of 0.125 MPa,which is 37.4%greater than that of desert sand without HAS stabilizer.The optimal combination of moisture content,compactness,and mass fraction of HAS stabilizer for maximum unconfined compression strength of desert sand is 12%,100.0%,and 4%.When the moisture content and the compactness of latosol are respectively 20%and 100.0%,the unconfined compression strength of latosol is 0.243 MPa,which is about 294%greater than that of latosol with changing moisture content and compactness.When the optimum mass fraction of HAS stabilizer is 5%for curing and modification of latosol,the unconfined compression strength of latosol can reach a maximum value of 0.303 MPa,which is 24.6%greater than that of latosol without HAS stabilizer.The optimal combination of moisture content,compactness,and mass fraction of HAS stabilizer for maximum unconfined compression strength of latosol is 20%,100.0%,and 5%.

关 键 词：土力学 无侧限抗压强度 沙漠砂 砖红壤 HAS土壤固化剂 力学性能 

分 类 号：TU443[建筑科学—岩土工程]