【摘要】 根据武汉地区长江三级阶地的地层特点和盲沟泄水降压抗浮原理，设计了盲沟泄水降压试验模型；选取武汉地区长江三级阶地的黏土和砂土2种介质，对试验模型中筒底盲沟1和侧壁盲沟2在单独泄水和共同泄水过程中土层内的压力水头和渗流量进行试验和理论分析，研究不同工况下试验模型土层中压力水头的分布规律和渗流量大小，验证了盲沟泄水降压技术应用于武汉长江三级阶地黏土层中的可行性。研究成果可为地铁地下车站结构的抗浮稳定设计提供理论依据和技术支持，同时也可为市政地下工程及地下空间结构的抗浮稳定设计提供参考。更多还原

【Abstract】 According to the stratum characteristics of the tertiary terrace of Yangtze River in Wuhan area and the principle of reducing pressure and anti-floating of blind ditch drainage,an experimental model of reducing pressure by blind ditch drainage was designed.Two kinds of media,clay and sand soils of tertiary terrace of the Yangtze River in Wuhan area,were selected in this experiment.The pressure head and seepage flow in the soil layer in the process of separate drainage and joint drainage of blind ditch 1 at the bottom of the inner tube and blind ditch 2 at the sidewall in the test model were measured and theoretically analyzed.The distribution law of pressure water head and seepage flow in the soil layer of test model under different conditions were analyzed,and the feasibility of reducing pressure by blind ditch drainage technology in the clay layer of the tertiary terrace of Wuhan Yangtze River was verified.The results can provide theoretical basis and technical support for anti-floating stability design of metro underground station,and also provide reference for anti-floating stability design of municipal underground engineering and underground space structure.更多还原