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1 前 言长江两岸沿大堤内侧修建有很多电排泵站、排灌站及涵闸等,由于沿江大多为双层地基结构,进水渠底和泵站底板多已处在强透水砂层顶面或只留有很薄的弱透水覆盖土层。因此汛期江水上涨,内侧渠底承压水头较高,顶穿土层鼓水冒砂,持续扩大冒砂范围,就会形成地下管涌?..
1 Introduction There are many electric discharge pumping stations, irrigation and drainage stations, culverts and so on built along the inside of the embankments on both banks of the Yangtze River. Since most of the riverside structures are double-layered, the bottom of inflow canals and the pumping station floor are mostly on the top of the permeable sand layer or only There is a thin, weakly permeable cover. Therefore, flood season river rises, the inside of the bottom of the confined pressure head is higher, top soil drilling sand, continue to expand the range of sand, it will form a underground pipe?