扁铲侧胀试验在地基处理效果评价中的应用  

Application of flat dilatometer test in evaluation of soft soil foundation improvement

作　　者：徐超[1,2] 陈忠清[1,2] 邢皓枫[1,2] 李伟[1,2] 

机构地区：[1]同济大学岩土及地下工程教育部重点实验室,上海200092 [2]同济大学地下建筑与工程系,上海200092

出　　处：《水文地质工程地质》2009年第1期100-103,共4页Hydrogeology & Engineering Geology

基　　金：江苏省交通厅科研项目(No.03Y023);上海市重点学科基金项目(沪教委科[2001]44号)

摘　　要：将扁铲侧胀试验用于某高速公路软基处理效果的评价中,检验不同技术方案处理软土地基的加固效果,研究扁铲侧胀试验用于软基加固效果评价的适用性和特点。结果表明,由扁铲侧胀试验确定的地基土不排水抗剪强度和压缩模量可以直观地反映地基加固前后的力学性能变化。扁铲侧胀试验以其准连续性和对土性变化的灵敏性,用于软土地基加固效果的分析和评价是可靠的。Flat Dilatometer Test （DMT） is a relatively new in-situ test technique, which has been widely used in the geotechnical engineering investigation and design, but it is seldom applied to the evaluation of soft soil foundation improvement. DMT was used in the evaluation of an expressway＇ s soft foundation improvement by different techniques. The traits and applicability of DMT in the evaluation of soft soil improvement were discussed. The results of this research show that the soil＇s undrained shear strength and constrained modulus deducted from DMT can directly reflect the variation of the mechanical properties of foundation soils before and after treatment, DMT has the features of near continuity and sensitivity to the variety of soil properties. It is reliable to employ DMT in the analysis and evaluation of foundation improvement.

关 键 词：原位测试 扁铲侧胀试验 软土地基 加固效果评价 

分 类 号：TU411.3[建筑科学—岩土工程] TU447[建筑科学—土工工程]