摘要
某湖滨道路的软土地基采用真空预压加固,真空预压的加固效果采用十字板剪切试验与静力触探等原位试验方法检验。试验结果表明预压前后土体强度有明显提高。利用既有的一些理论、经验公式,提出了根据强度增长随深度的递减规律推算超固结比、真空固结应力沿深度方向分布规律的建议。真空固结应力沿深度方向分布规律与孔隙水压力减小量沿深度方向分布规律监测结果较为接近。
The soft soils of a lakeside road is improved by vacuum preloading. The improvement effect is verified by the vane shear tests and static penetration tests. The in-situ test results indicate that the shear strength value after improvement is obviously promoted. Based on the relevant theory and empirical formula, a procedure for deducing the over-consolidation ratio and the effective consolidation stress from shear strength is proposed. The distribution of the effective consolidation stress with depth is in accordance with the decrease of the pore water pressure with depth.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2013年第S2期511-514,共4页
Chinese Journal of Geotechnical Engineering
关键词
真空预压
原位测试
超固结度比
有效应力
真空度
vacuum preloading
in-situ test
over-consolidation ratio
effective stress
degree of vacuum
