摘要
水泥土搅拌法是加固软土地基的常用方法,水泥土强度随龄期的发展规律直接影响水泥土的加固设计、施工进度安排和控制.基于我国东南沿海淤泥土特点,通过室内配比试验和力学加载试验,获得了5种以常用水泥为固化剂的水泥土试样90 d龄期内的应力应变曲线.在此基础上研究了不同固化剂和龄期对水泥土力学特性的影响,建立了水泥土抗压强度与龄期间的关系式,能根据水泥土3 d强度较准确地预测水泥土的后期强度,对于提高施工质量控制水平有重要意义.
Cement-soil mixing method is commonly used in strengthening soft soil foundation.The increase of cement-soil strength with age has a direct influence on the cement-soil reinforcement design,construction schedule arrangement and control,etc.Based on the characteristics of the silt soil of China′s southeast coast,the mechanical properties of cement-soil are studied using five common cements and their strain-stress curves at the age of 90 days are obtained through the lab mixing proportion tests and loading tests.The tests results show that the mechanical properties of cement-soil change with age and kinds of cement.The compressive strength-age formula of the cement-soil is achieved,which can be used to predict cement-soil strength according to 3 days′ strength accurately.It is helpful to improve the construction quality control.
出处
《水利水运工程学报》
CSCD
北大核心
2012年第1期26-29,共4页
Hydro-Science and Engineering
基金
国家自然科学基金青年科学基金资助项目(51009061)
水利部公益性行业科研专项经费资助项目(200801057
200901062)
中央高校基本科研业务费专项资金资助项目(2009B10114
2010B02414
2010B03214)
江苏高校优势学科建设工程资助项目(海岸带资源开发与安全)
关键词
水泥土
强度
龄期
淤泥
cement-soil
strength
age
silt soil
