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陕南土坎梯田田坎强度试验研究
杨娟1; 李光录1,2; 魏舟2; 张腾2; 李柏桥1
2016
Source Publication水土保持研究
Volume23Issue:1Pages:360-363
Abstract

以陕南土坎梯田田坎为研究对象,通过室内常规三轴剪切试验,对当地梯田田坎的变形和抗剪强度规律进行
了研究,分析了田坎土体的应力—应变关系及抗剪强度特性,探究了田坎产生破坏的形式及其产生这种破坏的原因。
结果显示:所采土样洋县的为膨胀土,黑山无膨胀性或较弱膨胀性;土样的强度变形关系在较高围压下呈硬化型,随
着围压升高结构破坏程度升高,应变强化程度增强,低围压下则呈现出弱软化特性;在土层120cm范围内的田坎土
样,其抗剪强度参数沿深度分布无明显规律性,抗剪强度参数对含水率变化敏感,分析认为由于含水率不同致使土层
之间存在的抗剪强度差异可能会导致田坎失稳。

Other Abstract

Terraced field ridge in southern Shaanxi was selected as the study site.A study on strength characteristics
of local terraced field ridge was carried out.The stress-strain relationship and shear strength characteristics
of ridge soil were analyzed,and the failure mode and cause of retaining wall of terraced field ridge
were explored.The results showed that soil samples of Yang County were expansive soil,while soil samples
taken from Heishan were not expansive or weak expansion.Strength-deformation relationship of soil samples
presented a hardening type at high confining pressure,structure failure and strain hardening level enhanced
with the increase of confining pressure,while a weak softening characteristic was observed under low confining
pressure.The distribution of shear strength parameters had no obvious regularity within 120cm depth
of soil layer,and they were sensitive to changes in moisture,maybe due to the different moisture contents
resulting in differences for shear strength between different soils,which may lead to the instability of ridge.

Keyword梯田田坎 应力—应变 粘聚力 内摩擦角
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8662
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学水土保持研究所
2.西北农林科技大学资源环境学院
Recommended Citation
GB/T 7714
杨娟,李光录,魏舟,等. 陕南土坎梯田田坎强度试验研究[J]. 水土保持研究,2016,23(1):360-363.
APA 杨娟,李光录,魏舟,张腾,&李柏桥.(2016).陕南土坎梯田田坎强度试验研究.水土保持研究,23(1),360-363.
MLA 杨娟,et al."陕南土坎梯田田坎强度试验研究".水土保持研究 23.1(2016):360-363.
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