用于透水铺装的蜂窝多孔砖性能测试

Performance test of cellular porous brick for permeable pavement

由城市化与工业化导致的城市径流与径流污染对城市水文和水质都会造成严重影响。透水铺装可以削减洪峰、减少污染。分析了当前透水铺装存在的缺陷。受启发于蜂窝仿生结构优越的力学性能与结构效率,设计并制备了一种新型六棱柱体"蜂窝孔"透水砖,分别采用万能试验机与人工降雨装置测定了蜂窝透水砖的力学性能、渗透性能。结果表明:蜂窝砖的临街破坏荷载,抗压强度分别达到了287.97~441.04kN和15.15~23.22MPa,比普通透水砖提高了10.38%~54.37%和6.32%~62.94%。在降雨重现期为20年和30年条件下,蜂窝砖的渗透系数分别比普通砖提高了38.2%与40.5%。试验结果表明,蜂窝结构能有效改善城市下垫面的透水能力,提高结构强度,并能减少铺砌的材料用量。

Flooding and stormwater pollution by urban runoff owing to the effects of urbanization and industrialization on both hydrology and water quality have become a serious issue.Permeable pavements are proposed to mitigate floods and reduce pollutants.This paper analyses the defects of current permeable pavement.Honeycomb bionic structure has superior mechanical properties and structural efficiency.Inspired by which,A new type of"honeycomb bionic"permeable pavement structure model was proposed and constructed.The performance of mechanical strength and permeability of the honeycomb permeable brick were quantitatively assessed by universal testing machine and artificial rainfall device,respectively.The results show that the critical damage load and compressive strength of honeycomb brick were 287.97~441.04 kN and 15.15~23.22 MPa,which were 10.38%~54.37%and 6.32%~62.94%higher than that of ordinary permeable bricks,respectively.Compared with the ordinary permeable bricks,the honeycomb brick was capable to increase the permeability coefficient by 38.2%and 40.5%under the condition of 20 years and 30 years rainfall recurrence period,respectively.The results were obtained demonstrated that the permeable brick with honeycomb-like structure is an effective way to improve the permeability,to enhance structural strength and to reduce material consumption of urban underlying surface pavement.