降雨渗透作用下砂质边坡剪切特性研究
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中图分类号：TU391.3 文献标志码：A 文章编号：1005-8249（2025）04-0068-07
DOI：10.19860/j.cnki.issn1005-8249.2025.04.013
TAN Jun1，2 ，ZHAO Weiling1²，ZHANG Zhenghao²，TAI Jiaoyang1，²，ZHU Xiaolong 1，2 WANG Zhiguang1，²，WU Bin4 ，WEN Xueyuan5
（1.Hebei Environmental Geology Exploration Institute，Shijiazhuang O50021，China；2. Hebei Key Laboratory of Geological Resources and Environment Monitoring and Protection， Shijiazhuang O5oo21，China;
3. College of Water Conservancy and Hydropower Engineering，Hohai University，Nanjing 210O24，China;
4.Preparatory Group of Xinjiang - Tibet Railway Company，Lasa 85OOOO，China； 5. China Railway No. 3 Engineering Group Fourth Engineering Co.，Ltd.， Beijing 102300，China）
Abstract：Inorder tostudythe influenceofrainfalinfltrationontheshearcharacteristicsofsandyslopes，this paperconducted amodeltestofsandyslopesunderrainfalltoinvestigatetheverticalandhorizontaldisplacementvariationlawsofsandyslopsat diferent positionsduringtheentirerainfallprocessunderdiferentrainfallintensifies.Theresultsshowthatthevertical displacementof thesoilonthesandyslopeatdiferentpositionsshowedatrendofincreasingrapidlyatfirstandthenslowly throughouttheentirerifallprocess.Theelationshipoftemagnitudeoftheverticaldisplacementoftesoilattesamedepth was the top of the slope > the bottom of the slope > the middle of the slope；However，the horizontal displacement of the sandy soilateachpositionchangedsignificantlyatdiferentstagesofrainfallThechangewasobviousatthetopoftheslopeinthe early stage ofrainfall，andthe horizontal displacement was mainlyinthemidleoftheslopeinthe midleandlaterstagesof rainfall；Underthesamenormal stress，thepeakshearstressandpeak sheardisplacementarenegativelycorelated withthe changeof moisture content.The increaseof moisturecontentreduces the interlocking efect betweenparticles.When the moisture content increases from 5% to 30% ，the internal friction Angle decreases from 34.4∘ to 22.7∘ .The direct shear test results have wellverifiedthe deformationcharacteristicsand instabilitymechanismof sandyslopesunderrainfallinfiltration.
Key words：rainfall infiltration；model test； slope water content； shear characteristics
0 引言
降雨是诱发边坡滑坡灾害的重要影响因素，雨水入渗会劣化边坡土体力学性质，降低边坡土体的剪切性能[1-2]。（剩余6272字）
