施工期改进双向水泥土搅拌桩复合地基监测分析  

Monitoring and Analysis of Composite Foundation Reinforced by Improved Bidirectional Soil-cement Mixing Piles During Construction Period

作　　者：范磊[1,2] 王保田[1,2] 陈文轩[1,2] 田拼 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098 [2]河海大学江苏省岩土工程技术工程研究中心,南京210098

出　　处：《三峡大学学报（自然科学版）》2017年第1期59-63,共5页Journal of China Three Gorges University：Natural Sciences

基　　金：国家重点基础研究发展计划(973计划)<大型水利水电工程高陡边坡全生命周期性能演化与安全控制>(2011CB013500)

摘　　要：针对双向水泥土搅拌桩应用中存在的问题,对传统双向水泥土搅拌桩及其施工工艺进行改进.改进双向水泥土搅拌桩采用"四搅三喷"、"框型搅拌头"制作工艺,实验证明,改进后水泥与土拌合非常均匀,桩身抗压强度较高.并对采用改进双向水泥土搅拌桩加固的复合地基在施工期时深层水平位移、地下水位监测结果进行分析.结果表明:采用改进的双向水泥土搅拌桩能够有效加固深厚软土边坡,保证护岸边坡稳定性.Aiming at the problems coming to bidirectional cement soil mixing pile during construction, we im- proved the traditional bidirectional cement soil mixing pile and mixing construction of it. Therefore it em- braced the technologies of four-time mixing and three-time spraying and frame type stirring head. And we have some tests about the improved ones, of which the results show that the cement and the sand mixed well, and the body of the piles could bear high pressures. And we observed the horizontal displacements and the groundwater levels of the composite foundation which strengthened by those improved piles during that period of construction and analyzed the data of observation. The analytical results indicate that the improved piles could really consolidate thick side slopes of soft soil so as to keep them stable.

关 键 词：复合地基 双向水泥土搅拌桩 施工工艺 深层水平位移 地下水位 

分 类 号：TU43[建筑科学—岩土工程]