防护方式对膨胀土边坡径渗流的影响  

Influence of protection methods on runoff and seepage of expansive soil slopes

作　　者：苏伟胜 马敏 黄震 罗鹏 邵羽 SU Weisheng;MA Min;HUANG Zhen;LUO Peng;SHAO Yu(Guangxi New Development Transportation Group Co.,Ltd.,Nanning 530029,China;School of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures,Nanning 530004,China;Guangxi Communications Design Group Co.,Ltd.,Nanning 530029,China)

机构地区：[1]广西新发展交通集团有限公司,广西南宁530029 [2]广西大学土木建筑工程学院,广西南宁530004 [3]特色金属材料与组合结构全寿命安全省部共建国家重点实验室,广西南宁530004 [4]广西交通设计集团有限公司,广西南宁530029

出　　处：《广西大学学报（自然科学版）》2023年第5期1080-1090,共11页Journal of Guangxi University（Natural Science Edition）

基　　金：广西重点研发计划项目(桂科AB22080061);广西交通运输行业重点科技项目(GXJT-2020-02-08);广西科技基地和人才专项(桂科AD20238069)。

摘　　要：为了研究降雨条件下防护方式对膨胀土边坡径流及雨水入渗的影响,基于防渗护壁材料对膨胀土边坡进行防护,通过开展9组不同防护方式及不同坡度的膨胀土边坡室内模型试验,对各边坡的产流时间、径流量、径流速率以及土体含水率的变化规律进行对比和分析。研究结果表明:二类边坡产流时间显著小于其他边坡,且产流时间随边坡坡度的增加而减小;二类边坡的径流量和径流速率均为最大,其径流量可快速到达稳定状态,护壁材料防护层的截水导排性能优异;降雨入渗对二类边坡土体含水率的影响最小,边坡坡度与含水率变化幅度呈反比关系。In order to study the influence of protection methods on the runoff and rainwater infiltration of expansive soil slopes under rainfall conditions,polymer waterproof coating were used to protect the expansive soil slopes.By conducting nine groups of indoor model tests on expansive soil slopes with different protection methods and different slopes,the change patterns of runoff generation time,runoff volume,runoff rate and soil water content of each slope were compared and analyzed.The research results show that the runoff generation time of the second category slope is significantly smaller than those of other slopes,and the runoff generation time decreases with the increase of the slope gradient.The runoff volume and runoff rate of the second category slope are both the largest,and its runoff volume can quickly reach the stable state.The water interception and drainage performance of the protective layer of polymer waterproof coating is excellent.The influence of rainfall infiltration on the water content of the soil of the second category slope is the smallest,and the slope gradient is inversely proportional to the change of water content.The polymer waterproof coating has a significant role in inhibiting the infiltration of rainwater and maintaining the stability of water content.

关 键 词：膨胀土边坡 防护方式 降雨 径流 护壁材料 模型试验 

分 类 号：TU443[建筑科学—岩土工程]