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为了探究透水混凝土路面内堵塞物在其空隙内的位置与深度等分布特征,并为空隙维护过程中的设备选择与维护频率提供技术依据,该文选用带有直径200mm抽吸软管的清理车、高压街道清扫车、循环空气式清扫车3种设备对不同地域的透水混凝土空隙内的堵塞物进行了清理,并采用光学显微镜研究了清理前后透水混凝土芯样内堵塞物的位置与深度等分布特征。在此基础上,提出了透水混凝土路面空隙内堵塞物的清理频率。结果表明:透水混凝土空隙内的阻塞物从表面迁移到内部的最大深度约为12.7mm。采用文中所用3种车辆都能清除3.18mm深度范围内的阻塞物;阻塞物的聚团是决定透水混凝土渗透性的主要因素;清除透水混凝土空隙内阻塞物的维护频率取决于空隙内阻塞物的填充率。
In order to explore the location and depth of blockage in pervious concrete pavement, and to provide the technical basis for equipment selection and maintenance frequency in the process of air gap maintenance, this paper chooses a cleaning car with a diameter of 200mm suction hose , High-pressure street sweeper and circulating air sweeper were used to clean up the blockages in the pervious concrete voids in different regions. The optical microscope was used to study the location and depth distribution of the blockages in the pervious concrete core samples before and after cleaning feature. On this basis, the cleaning frequency of blockage in pervious concrete pavement was proposed. The results show that the maximum depth of the blockage in the water-permeable concrete gap from the surface to the interior is about 12.7mm. The three kinds of vehicles used in this article can clear the blockage within the depth of 3.18mm; the agglomeration of the blockage is the main factor that determines the permeability of the pervious concrete; the frequency of maintenance of the blockage in the clearance of the pervious concrete depends on the Fill rate.