水泥改良素填土的试验研究应用  

Experimental research and application of cement improved plain fill

作　　者：罗明亮 范少峰[2] 杜广印[3] 王宇虓 Luo Mingliang;Fan Shaofeng;Du Guangyin;Wang Yuxiao(Shenzhen Land Investment and Development Center,Shenzhen 518000,China;Shenzhen Construction Engineering Quality Inspection Center,Shenzhen 518031,China;School of Transportation,Southeast University,Nanjing 211189,China)

机构地区：[1]深圳市土地投资开发中心,广东深圳518000 [2]深圳市建设工程质量检测中心,广东深圳518031 [3]东南大学交通学院,江苏南京211189

出　　处：《山西建筑》2021年第23期65-67,71,共4页Shanxi Architecture

摘　　要：结合深圳机场扩建工程,对软弱土进行改良,分别进行了室内试验与现场试验,分析了水泥掺量和碎石对改良土的力学特性的影响。结果表明:碎石的质量分数提高10%,动力触探击数约增加25%;水泥掺量10%,碎石掺量20%,该配比的反应模量最大,可达171.1 MPa/m;水泥的质量分数每增加2%,2.5 mm时的CBR大约增加6.3%。Combined with the expansion project of Shenzh en Airport,the soft soil was improved,and indoor tests and field tests were carried out respectively to analyze the influence of cement content and crushed stone on the mechanical properties of the improved soil.The results show that:increasing the content of crushed stone by 10%,the number of dynamic cone penetration increases by about 25%;the content of cement is 10%,the content of crushed stone is 20%.The reaction modulus of this ratio is the largest,reaching 171.1 MPa/m;for every 2% increase in cement content,the CBR at 2.5 mm increases by approximately 6.3%.

关 键 词：水泥改良土 软弱土 动力触探 

分 类 号：TU411[建筑科学—岩土工程]