摘要
为了利用离心模型试验研究降雨条件下边坡的变形和破坏特性,研制了一套离心场降雨模拟系统。该系统包括3个子系统:供水加压系统、降雨器、模型箱及防风结构。该系统可通过控制施加压力来调节降雨强度,并能克服离心场中科氏力及高风速对降雨的影响。有效性验证试验结果表明,该降雨系统在模型箱长度和宽度方向均能实现比较均匀的降雨。采用该系统进行了黏性土坡降雨的离心模型试验,结果表明降雨及其入渗过程对边坡的变形有显著影响。
A rainfall simulation system in centrifuge is developed to investigate the deformation and failure process of slopes due to rainfall.The system consists of three subsystems： water supply and air pressurizing system,rainfall generator and specialized model container with windproof structure.The system can eliminate influences of the Coriolis force and the high-speed wind on the rainfall.The intensity of rainfall can be adjusted by controlling the air pressure.The validation tests are conducted,and the results show that a uniform rainfall over the whole slope can be yielded by the simulation system.Centrifugal model tests on a cohesive soil slope under rainfall are conducted by use of the rainfall simulation system.The water infiltration in soil during the rainfall is observed to have a significant influence on the deformation and the failure of the slope.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2010年第6期838-842,共5页
Chinese Journal of Geotechnical Engineering
基金
国家重点基础研究发展计划(973计划)课题(2007CB714108)
国家自然科学基金项目(50778105)
关键词
降雨
边坡
离心模型试验
设备
rainfall
slope
centrifuge model test
device
