摘要
针对下蜀土在实际降雨入渗条件下抗剪强度演化规律研究的不足,以镇江两处典型边坡的下蜀土为研究对象,根据自动化监测获得的降雨入渗下的含水率变化数据,开展了降雨入渗条件下下蜀土抗剪强度演化规律的试验研究。研究结果表明:下蜀土的抗剪强度受含水率影响较大,同时存在一界限含水率,在该含水率左右的下蜀土强度特性不同;随着含水率的增加,两处下蜀土的黏聚力都为先小幅减小,而后急剧减小,最后再小幅减小并最终保持稳定;随着含水率的增加,下蜀土的内摩擦角则为先急剧减小,再小幅减小并最终保持稳定。研究结果可为下蜀土边坡的防护治理提供理论依据,具有实际工程意义。
Under the actual rainfall infiltration condition, the research on the shear strength evolution law of Xiashu loess is insufficient. According to the change of water contents under the condition of rainfall infiltration obtained by automatic monitoring, the experimental research on the shear strength evolution law of Xiashu loess under the condition of rainfall infiltration was carried out in two typical slopes in Zhenjiang. The results show that the shear strength of Xiashu loess is greatly affected by the water content, and the strength characteristics of Xiashu loess are different near limit water content. With the increase of water contents, the cohesion of Xiashu loess decreases slightly at first, then decreases sharply, finally decreases slightly and remains stable. With the increase of water contents, the internal friction angle of Xiashu loess decreases sharply at first, then decreases slightly and finally remains stable. The research results can provide a theoretical basis for the protection and treatment of Xiashu loess slope, and have practical engineering significance.
作者
蔡宇宸
刘顺青
郑力铭
周萍
梅鹏飞
何思节
Cai Yuchen;Liu Shunqing;Zheng Liming;Zhou Ping;Mei Pengfei;He Sijie(School of Architecture and Civil Engineering,Jiangsu University of Science and Technology,Zhenjiang 212100,Jiangsu,China;Jiangsu Province Engineering Research Center of Geoenvironmental Disaster Prevention and Remediation,Zhenjiang 212100,Jiangsu,China)
出处
《岩土工程技术》
2022年第5期404-408,共5页
Geotechnical Engineering Technique
基金
国家自然科学基金项目(51979128)
江苏省高等学校大学生创新创业训练计划项目(202110289027Z)。
关键词
下蜀土
降雨入渗
含水率
抗剪强度
现场测试
Xiashu loess
rainfall infiltration
water content
shear strength
field test
