Based on the concept of sponge city and active anti-floating,the mechanism of anti-floating accident in non-permeable stratum and common problems in the backfilling process of foundation pit trough are analyzed.A new type of structure is designed to intercept,store and reuse the infiltration rainwater.The storage volume of the new trough of backfill structure is related to several parameters,such as rainfall intensity,initial rainwater abandoned discharge,runoff coefficient and catchment area.The case shows that if the space of foundation pit trough can be fully utilized,the new backfilling structure can not only make full use of rainfall resources,but also greatly reduce the drainage pressure of municipal pipe network.
维普
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