圆孔扩张理论求解旁压试验临界深度  

APPLICATION OF CYLINDRICAL CAVITY EXPANSION THEORY TO SOLVE THE CRITICAL DEPTH OF PRESSUREMETER TEST

作　　者：周建武[1] 楼晓明[1] 陈毅麟[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092

出　　处：《低温建筑技术》2009年第9期56-58,共3页Low Temperature Architecture Technology

摘　　要：旁压试验由于受地表的影响,浅层试验数据并不能正确反映土体真实的物理性质。本文基于圆孔扩张理论,并根据平面应变条件,建立极限平衡方程,从而解得旁压试验的临界深度,并把狭义的匀质土中的临界深度概念推广到了各种复杂土层中,使其具有普遍意义。本文提出的旁压试验临界深度是指旁压试验不受地表影响的深度,在此临界深度以下的Pf或Pl/k可以与地基土的基本承载力建立关系。Due to the effects of soil surface, the shallow test data of pressuremeter test does not accurately reflect the real soil physical properties. This paper based on cylindrical cavity expansion theory and the conditions of plane strain to estabhsh the equilibrium equations, and thus solved the critical depth of pressuremeter test. Then promoted the special concept of critical depth which in the homogeneous soil to all kinds of soil, so that it will have universal significance. The critical depth of pressuremeter test in this article means the depth beyond the effects of soil surface, under which Pf or P1/k can establish the relation with the Foun-dation bearing capacity.

关 键 词：平面应变 圆孔扩张理论 旁压试验 临界深度 

分 类 号：TU470.3[建筑科学—结构工程]