淤填黏土固结过程中孔隙比的变化规律  

Variation of void ratio in course of consolidation of warping clay

作　　者：张力霆[1,2] 齐清兰[2] 魏静[3] 霍倩[2] 周国斌[1] 

机构地区：[1]中国水利水电科学研究院岩土工程研究所,北京100044 [2]石家庄铁道学院土木工程分院,石家庄050043 [3]北京交通大学土建学院,北京100044

出　　处：《岩土力学》2009年第10期2935-2939,共5页Rock and Soil Mechanics

基　　金：河北省自然科学基金资助项目(No.E2007000665;No.E2007000652)

摘　　要：针对土坝黏土铺盖裂缝的淤填固结问题,在充分考虑固相、液相连续性条件和平衡条件的情况下,建立了以孔隙比为控制变量的微分方程。选用两种黏性土进行渗透诱发固结试验,确定各自的孔隙比、渗透系数、有效应力之间的关系。采用软件Matlab的内置函数求解微分方程,得到孔隙比的时空分布曲线。通过试验对数值计算结果进行了验证,结果表明,数值计算得到的孔隙比分布曲线与实测的孔隙比分布曲线基本吻合,具有相同的分布规律,为研究土坝铺盖裂缝处淤填土的固结问题提供了科学依据。For the warping clay consolidation of blanket crack of clay, under the situation of continuity and equilibrium of solid and liquid phases, a differential equation with the void ratio as a control variable is deduced. Based on the permeation induced consolidation test of highly plastic clay and general clay, the relation among the void ratio, permeability coefficient and the effective stress is determined. The pdepe of Matlab function library is used to solve the differential equations and the temporal-spatial distribution of void ratio is obtained. The calculation results are verified by the model test and the site warping test. The void ratio distributions come from the calculation and the test have the same pattern and tend towards the consistence with the ansolidation, The results provide a scientific basis to research the consolidation of warping clay in blanket crack for soil dam.

关 键 词：铺盖裂缝 渗透力 淤填土固结 孔隙比 模型试验 

分 类 号：TV223.6[水利工程—水工结构工程]