滨海区海相沉积土压缩模量的试验研究  

IN-SITU AND LABORATORY TESTS FOR DETERMINATION OF COMPRESSION MODULUS OF COASTAL SOFT SOIL

作　　者：夏玉斌[1] 曹中兴[1,2] 王清[2] 

机构地区：[1]中交水运规划设计院有限公司,北京100101 [2]吉林大学建设工程学院,长春130026

出　　处：《工程地质学报》2013年第3期464-469,共6页Journal of Engineering Geology

基　　金：国家自然科学基金(41172236)

摘　　要：在滨海区海相沉积土地基的压缩性评价和计算中,压缩模量是一个重要的土性指标,尤其是在变形要求严格的工程中,对于压缩模量取值的研究具有重要意义。以我国北方某填海造地机场工程场区地基土为研究对象,进行原位测试和变形专项研究。在现场采用固定平台取土和测试,通过室内试验获取了各层土的室内试验压缩模量,通过旁压试验、静力触探试验等原位测试方法得到了各层土的相应的压缩模量。通过分析发现,两种原位测试方法得到的压缩模量,与室内试验自重应力下的压缩模量吻合度较好,说明采用固定平台进行测试,成果合理可靠。在具体的计算取值时,如原位测试数据样本充足,推荐以原位测试成果为主,再考虑室内试验自重应力下的压缩模量。Compression modulus is an important index in the evaluation and calculation of coastal soil foundation compressibility, especially in projects with strict requirements on deformation. So it is of great significance to study its determination methods. The deformation characteristics of soft soil distributed in land reclamation site in north China were studied through in-situ and laboratory method. Pressuremeter test and cone penetrometer test were conducted on the basis of field fixed platform to obtain compression modulus of each soil stratum. The deformation parameters of soil were also determined through indoor test. The relationship between parameters achieved through in-situ and laboratory tests are compared and examined. The results show a better coincidence degree of compression modulus obtained by these three methods. The results provide a helpful reference for the reasonable selection of deformation calculation parameter of soft soil.

关 键 词：软土 压缩模量 旁压试验 静力触探试验 变形参数 

分 类 号：TU41[建筑科学—岩土工程]