膨胀土边坡防护机理分析及防护方法比较
摘要:膨胀土是一种广泛分布的难处理的问题土。膨胀土边坡容易发生失稳破坏，要找到最佳的防护方法，需要从其破坏机理着手。总结失稳机理的已有研究成果，指出膨胀土边坡具有区别于一般黏性土边坡的特殊破坏机理，主要在于膨胀土的裂隙性，需要特殊对待。对膨胀土边坡的特殊防护机理进行了分析，主要为通过控制边坡水分变化来限制土体裂缝开展。按照防护机理的不同，将现有的膨胀土边坡防护方法分为两类：限制裂缝开展和不限制裂缝开展，前者包括土工膜法、换填法和化学改性法等，后者包括支挡结构法、坡面防护法、土工袋法和物理改良法等。对这些防护方法进行了具体的分析和比较，以供工程运用选择作参考。对膨胀土边坡防护方法的设计给出了建议。
Abstract:Expansive soil is a kind of widely distributed and hard treated trouble soil. Slope failure may often occur in expansive soil. The best slope protection method of expansive soil slope can only be found, if the failure mechanism is considered. Existing research results of slope failure mechanism for expansive soil is summarized in this paper, and the special slope failure mechanism distinguished expansive soil from common cohesive soil is proposed, which is the crack developed in expansive soil, so special attention should be paid to it. The protection mechanism of expansive soil slope is analyzed, which is controlling slope soil water and limiting crack development. According to the difference in protection mechanism, existing expansive soil slope protection methods can be classified to two categories:limiting crack developing methods and non-limiting crack developing methods. The former includes geomembrane method, replacement method, chemical modified method and so on. The latter includes supporting structure method, surface protection method, soilbag method, physical improvement method and so on. Specific analysis and comparison is made for expansive soil slope protection methods, which can be as a reference in engineering application. In the end, suggestions are proposed for slope protection methods designing of expansive soil.
中文标题：
膨胀土边坡防护机理分析及防护方法比较
Analysis on Protection Mechanism and Comparison on Protection Methods for Expansive Soil Slope
作者：
丁国权1,2,袁俊平1,2
Ding Guoquan1,2,Yuan Junping1,2
作者简介:丁国权,男,1986年生,安徽宣城人,实验师,主要从事非饱和土及堤坝工程等方面的研究。E-mail:dingguoquan2004@126.com
通讯地址：
1. 河海大学岩土力学与堤坝工程教育部重点实验室, 江苏南京 210098; 2. 河海大学岩土工程研究所, 江苏南京 210098
1.KeyLaboratoryofMinistryofEducationforGeomechanicsandEmbankmentEngineering,HohaiUniversity,Nanjing210098,Jiangsu,China; 2.GeotechnicalResearchInstitute,HohaiUniversity,Nanjing210098,Jiangsu,China
中图分类号:TU443
doi:10.3969/j.issn.1007-2993.2018.02.007
出版物：岩土工程技术
收稿日期:2017-06-20
网络出版日期:2021-07-06
关键词:膨胀土边坡,裂隙,机理,防护方法
Key words:expansive soil slope,crack,mechanism,protection methods
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基金项目：
基金项目: 国家自然科学基金面上项目（51378008）；中央高校基本科研业务费专项资金项目（B15020060）
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