[1]黄月华,周成,李红梅.降雨中有植被覆盖土坡大孔隙结构对边坡稳定性的影响[J].水利与建筑工程学报,2018,(03):132-137.[doi:10.3969/j.issn.1672-1144.2018.03.024]
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降雨中有植被覆盖土坡大孔隙结构对边坡稳定性的影响()
《水利与建筑工程学报》[ISSN:1672-1144/CN:61-1404/TV]
- 卷:
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- 期数:
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2018年03期
- 页码:
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132-137
- 栏目:
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岩土力学与土木工程
- 出版日期:
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2018-06-15
文章信息/Info
- 作者:
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黄月华1; 周成1; 2; 李红梅3
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1.四川大学水电学院水力学与山区河流开发保护国家重点实验室,四川成都610065;
2.南京水利科学研究院水利部土石坝破坏机理与防控技术重点实验室,江苏南京210024;
3.深圳市益田集团股份有限公司,广东深圳518053
- 关键词:
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有植被土坡; 大孔隙结构; SWCC曲线; 根系固土; 降雨滞水; 降雨滑坡
- 分类号:
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TU43
- DOI:
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10.3969/j.issn.1672-1144.2018.03.024
- 文献标志码:
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A
- 摘要:
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降雨时,植被覆盖边坡表层土体中存在的大孔隙结构致使雨水快速入渗到根系底部,如果下层
土体的渗透性较差,就会造成有植被覆盖土体中的顺层渗流和上层滞水现象。通过具有双进气压力值
的SWCC曲线和渗透系数曲线来表征有植被土体中的孔隙结构对土坡水力性能的影响。数值分析结果
表明了这一做法的合理性,同时据此对降雨条件下大孔隙结构的增渗作用对边坡的稳定性进行初步探
究:与无植被覆盖的边坡进行对比,发现植被根系的力学加固作用被大孔隙结构增渗作用所掩盖的“临
界时刻”会随着降雨强度的增加而逐渐趋于某一定值,而该固定值与边坡表层土体中的大孔隙结构的饱
和渗透系数有关;同时“临界时刻”会随着大孔隙影响深度的增加而线性地增加。计算分析结果可为
CBS护坡系统排除降雨滞水的计算与设计提供参考。
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备注/Memo
- 备注/Memo:
-
收稿日期:2017-12-15 修稿日期:2018-01-30
基金项目:国家自然科学基金项目(51579167);水利部行业专项项目(201301022);水利部土石坝破坏机理与防控技术重点实验室开放基金
项目(YK913002)
作者简介:黄月华(1992—),男,重庆人,硕士研究生,研究方向为环境岩土工程。E-mail:2416159751@qq.com
通讯作者:周成(1970—),男,江苏赣榆人,教授,主要从事环境岩土工程研究。E-mail:czhou@scu.edu.Cm
更新日期/Last Update:
1900-01-01