陕南土坎梯田田坎膨胀率与力学性质的试验研究  

Test on Expansion Ratio and Mechanical Property of Terrace Soil Ridges of Southern Shaanxi

作　　者：杨娟[1] 李光录[1,2] 魏舟[2] 张腾[2] 李柏桥 付玉[1] 刘利年 

机构地区：[1]西北农林科技大学水土保持研究所,陕西杨陵712100 [2]西北农林科技大学资源环境学院,陕西杨陵712100 [3]陕西省水土保持局,陕西西安710004

出　　处：《中国水土保持》2015年第5期40-43,77,共4页Soil and Water Conservation in China

基　　金：水利部科技推广计划项目(TG1308);陕西省水保局重点科技示范项目(20101003)

摘　　要：以陕南土坎梯田田坎土体为对象,通过室内无荷载膨胀率和无侧限抗压强度试验,分别研究了无荷载膨胀率随时间的变化情况和土体的应力—应变关系,并对最终稳定的无荷载膨胀率和无侧限抗压强度进行相关性分析。结果表明,洋县的梯田田坎土层越深,其最终的膨胀变形量越大,无侧限抗压强度越大,黑山镇的则无明显规律;土体的无侧限抗压强度与其最终稳定时的膨胀率成指数变化关系。The paper studied the variation of non-load expansion rate along with the time and stress-strain relationship of soil mass respectively by taking soil mass of terrace ridge of southern Shaanxi as an object and through indoor tests of non-load expansion rate and unconfined compressive strength and analyzed the relativity of the final stabilized non-load expansion rate and unconfined compressive strength. The outcomes show that a) the deeper of terrace ridge soil of Yangxian County is,the greater the final expansion deformation and the unconfined compressive strength will be. There is no obvious law in Heishan Township and; b) the unconfined compressive strength of soil mass shows exponential variation relation with its final stabilized expansion rate.

关 键 词：梯田田坎 无荷载膨胀率 无侧限抗压强度 试验 陕南 

分 类 号：S284[农业科学—农业水土工程]