Development of rainfall simulation system for centrifugal model tests
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摘要: 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。Abstract: 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.
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Keywords:
- rainfall /
- slope /
- centrifuge model test /
- device
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