透水砖应用于海绵城市建设的若干问题探讨

Discussion on the Application of Water Permeable Brick in the Construction of Sponge City

从海绵城市建设的作用和目的出发,介绍了透水砖铺装的应用现状。阐述了透水砖铺装应用需系统考虑地形地貌、地下状况、与周边建(构)筑物和景观的协调情况等系列综合因素,以及结构类型确定的适用条件;从透水砖铺装透水机制入手,分析了满足渗水、蓄水要求的透水基层厚度核算公式;针对渗透系数较低的土基提出了能同时提高渗透速度和土基承载能力的小型砂石桩改进型透水铺装基层结构;对透水砖铺装使用期的维护和管理的重要性进行了分析,并介绍了常用的恢复透水砖透水能力的方法。

The application of water permeable brick pavement was introduced on basis of water the sponge city construction. Before the application of water permeable brick, many factors should be consid- ered, such as the topography, geological conditions, the situation of the underground, and the coordina- tion with the surrounding buildings and landscape etc., which are closely related to the structure of the porous pavement system. Through the mechanism analysis of the porous pavement system, a formula is put forward to meet the base thickness for water storage requirements. An improved porous structure with small sand-gravel pile was recommended to improve the penetration speed and the subsoil bearing capaci- ty. The importance of the water permeable brick maintenance in the service periods was analyzed, and several methods to restore the permeability of water permeable brick were introduced.