新型再生透水混凝土抗暴雨内涝设计方法

Design Method of Novel Recycled Pervious Concrete for Resisting Rainstorm and Waterlogging

铺装透水混凝土路面是降低城市暴雨内涝灾害发生概率的有效途径。为实现透水混凝土路面在不同暴雨等级下的合理应用,提高再生资源利用率,达到抗暴雨内涝的目的,提出一种新型再生透水混凝土的设计方法。根据透水系数建立孔隙率与暴雨等级的定量关系,确定出抗不同暴雨等级的透水混凝土最佳孔隙率范围,基于孔隙率与强度之间的关系,明确混凝土强度等级,进行配合比设计;通过新型再生透水混凝土力学及暴雨模拟试验验证及分析,结果表明,不同孔隙率的新型再生透水混凝土抗压、抗弯拉强度均能满足透水混凝土路面的使用要求,具有优异的抗暴雨内涝性能。新型再生透水混凝土抗暴雨内涝的设计方法,为不同地区(暴雨等级)的透水混凝土路面设计提供了可靠依据。

Paving pervious concrete pavement is an effective way to reduce the urban rainstorm waterlogging disaster.To realize the rational application of pervious concrete pavement under different rainstorm grades,improve the utilization rate of renewable resources,and achieve the purpose of resisting rainstorm and waterlogging,a novel design method of recycled pervious concrete was proposed.The quantitative relationships between porosities and rainstorm grades were established,and the optimum porosity ranges of recycled pervious concrete which can resist different rainstorm grades were determined.Based on the relationship between porosity and strength,the strength grade of concrete was defined and then the mix proportions were designed.The mechanical strength and rainstorm simulation tests of the novel recycled pervious concrete were verified and analyzed.The results show that the compressive and flexural strength of recycled pervious concrete with different porosities meet the requirements of pervious concrete pavement.This concrete possesses excellent resisting rainstorm and waterlogging performance as well.The design method of the novel recycled pervious concrete for resisting rainstorm and waterlogging provides a reliable basis for the design of pervious concrete pavement in different regions(under different rainstorm grades).