关键词: 桥头跳车：桥头搭板, 有限元, 地基模量, 桥台高度

Abstract: Setting approach slap and paving geogirds are two primary measures to reduce the bridge head bump．The length of the approach slap should be shortened even be cancelled as enhancing the rebound module of the padding in the back of the abutment．According to the data of the ground module heightened by paving geogirds to deal with the bridge head bump in the freeway from Liangping to Changshou in Chongqing，This article analyses the relation among the ground module，the depth of abutment and the length of the approach slap，which can be referenced in the correct design an d construction of the approach slap by utilizing finiteelement program．

Key words: bridgehead-bump, approach slap, ground module, abutment depth, finite element