林芝某乡村高填方路基土应力应变特性试验研究  

Research on Stress and Strain Characteristics of High Fill RoadbedSoil in a Village in Nyingchi

作　　者：金建立 JIN Jianli(Water Conservancy Project&Civil Engineering College,Tibet Agriculture&Animal Husbandry University Nyingchi Tibet,860000,China)

机构地区：[1]西藏农牧学院水利土木工程学院,西藏林芝860000

出　　处：《高原农业》2020年第6期617-622,共6页Journal of Plateau Agriculture

基　　金：西藏土木水利电力工程技术研究中心重点实验室资助项目(ZTJS-01)。

摘　　要：本文在对林芝某乡村高填方路堤土进行室内大型三轴试验的基础上,对其应力应变曲线规律进行分析,并引入归一化的概念对粗颗粒土三轴试验的应力应变曲线特性进行归一化分析,得出了该区域粗颗粒混合料的应力应变曲线存在归一化特性。通过对试验结果的分析得到了高路堤填方土在不同归一化因子条件下的归一化特性,指出该粗颗粒土应力应变曲线在不同的归一化因子下其归一化程度和离散性存在一定的差别,采用主应力极限值为归化因子对路堤土进行归一化分析时,三轴试验的应力应变关系基本能够归一到一条直线上,归一化效果较前两种的归一化程度高,当该区域边坡稳定性研究中缺少实验数据时,可根据该归一化公式为区域边坡稳定性分析中土体力学参数的选取提供理论参考。Based on the large-scale triaxial test of a rural high fill embankment soil in Nyingchi,this paper analyzes the law of stress-strain curve,and introduces the concept of normalization to analyze the characteristics of stress-strain curve of coarse-grained soil in triaxial test,and concludes that the stress-strain curve of coarse-grained mixture in this area has normalization characteristics.Through the analysis of the test results,the normalization characteristics of high embankment fill soil under different normalization factors are obtained.It is pointed out that the normalization degree and dispersion of the coarse-grained soil stress-strain curve are different under different normalization factors.When the principal stress limit value is used as the normalization factor,the stress-strain relationship basis of triaxial test is used to analyze the embankment soil normalization.When there is no experimental data in the study of slope stability in this area,the normalization formula can provide theoretical reference for the selection of soil mechanical parameters in regional slope stability analysis.

关 键 词：大三轴试验 应力应变 归一化 

分 类 号：TU375.4[建筑科学—结构工程]