基于自蓄水理论的低渗土壤城市内涝问题研究

Research on Urban Waterlogging in Low-permeability Soil Based on Self-storage Theory

针对常规透水铺装难以解决海淤城市内涝问题,通过研制一体成型空腔蓄水-渗透装置,提出了一种消除低渗土壤地区内涝问题的自蓄水理论。对蓄水渗透装置进行了蓄水渗透能力和地基承载力试验研究。研究结果表明,与常规透水铺装相比,蓄水渗透装置在4 cm/h模拟雨强下4 h未产生地表径流,24 h内雨水入渗情况良好;对比天然地基,蓄水渗透装置能够提升地基承载力约40%,具有加固地基土的作用。

In view of the fact that conventional permeable pavement is difficult to solve the problem of waterlogging in sea-silted cities,through the development of an integrated cavity water storage-infiltration device,a self-storage theory is proposed to eliminate the problem of waterlogging in low-permeability soil areas.The experimental study on water storage permeability and foundation bearing capacity of the water storage infiltration device was carried out.The research results show that,compared with conventional permeable pavement,the water storage infiltration device does not produce surface runoff for 4 hours under 4 cm/h simulated rain intensity,and rainwater infiltration is good within 24 hours;compared with the natural foundation,the water storage infiltration device can increase the bearing capacity of the foundation by about 40%and has the function of strengthening the foundation soil.