摘要
连临高速路江苏段地基土层为滨海相软土,路基采用水泥土搅拌桩加固。现场取土进行室内水泥土改性试验发现,水泥土强度随水泥掺量和龄期的增加而增大。现场水泥土搅拌桩抽芯样试验发现,相同龄期条件下,水泥土室内试验强度一般要比抽芯样强度高0.2至0.8兆帕。两种实验中,该地基第一层土的水泥土强度均大于第二层土,表明土层性质对水泥土强度影响很大。受搅拌不均匀影响,芯样试验强度比较离散,随芯样夹土厚度增加,水泥土芯样波速和强度下降。
The foundation of the Jiangsu section of the Lianlin highway is made up of marine soft soil. It is strengthened by ce- ment mixing piles. The indoor modification experiment results indicate that the strength of cement-soil increases with the mixed cement amount and age. With the same age, the cement-soil strength in the indoor experiment is bigger by 0.2-0.8 MPa than that in the core sample test. The results also show the nature of soil layers has great influence on the strength of cement-soil. Under the influence of uneven mixing, the strength of the core samples is very discrete, their strength and wave velocity decrease as the thickness of the intercalated soil increases.
出处
《地质灾害与环境保护》
2012年第3期64-67,共4页
Journal of Geological Hazards and Environment Preservation
基金
2008年度高等学校科技创新工程重大项目培育资金项目(708043)
关键词
连临高速
搅拌桩
水泥土强度
芯样
Lian-lin highway
mixing cement pile
strength of cement-soil
core sample
作者简介
许崧（1980-），男，博士，2001年毕业于南京大学地球科学系，水文地质工程地质专业，主要从事岩土力学方面的研究工作。
