论文部分内容阅读
依托长(治)平(顺)高速公路工程,在路桥过渡段进行了新型三向格栅加筋路堤的现场试验,对格栅与桥台之间锚固连接与无连接两种工况加筋路堤中格栅上、下表面的土压力与格栅变形进行了测试,分析了新型三向格栅加筋桥头路堤填土的有效长度和作用效果。并利用数值模拟分析了格栅刚度和路堤填料参数对桥头差异沉降和格栅锚固端拉力的影响。结果表明:三向格栅加筋处理桥台搭接路堤能够在一定程度上减小格栅下部土压力和路堤沉降,其有效加固长度约为6 m;格栅与桥台锚固能够有效提高格栅拉力,减小桥台邻近路堤的沉降,而格栅与桥台无连接时,格栅抗拉能力不能有效发挥,路堤沉降不能有效控制;格栅刚度与填料黏聚力对格栅拉力和路桥差异沉降具有较大影响,在工程中应根据工程条件选择适宜刚度的格栅和具有一定黏聚力的路堤填料。
Based on the Changping (Shun) Ping (Shun) expressway project, a new type of three-dimensional grid-reinforced embankment was tested on the road and bridge transitional section. The two conditions of reinforced concrete with anchorage and connectionless connection between grid and abutment were reinforced The embankment in the grille, the lower surface of the earth pressure and deformation of the grille was tested and analyzed the new three-way grille reinforced bridge head embankment effective length and effect. The effects of grid stiffness and embankment filler parameters on the differential settlement of bridge head and the tension at the anchorage end of the grid were analyzed by numerical simulation. The results show that the three-way grid stiffened abutment embankment can reduce the earth pressure and embankment settlement to a certain extent, and the effective reinforcement length is about 6 m. The anchorage between the grid and the abutment can effectively improve the grid The tensile force of the grid can reduce the settlement of abutment adjacent to the abutment. When the grid is not connected with the abutment, the tensile strength of the grid can not be effectively exerted, and the embankment settlement can not be effectively controlled. Road and bridge differential settlement has a greater impact in the project should be based on engineering conditions to choose the appropriate stiffness of the grid and has a certain degree of cohesion embankment filler.