In the high-fill terrain section where the fill height behind the abutment is more than 10 m and the slope cannot be placed in front of the abutment,the abutment must be able to resist the large earth pressure behind the abutment and have the large vertical and horizontal bearing capacities to overcome the large uneven settlement of the fill behind the abutment.But the type of traditional abutment is hard to meet the above demands.Taking a cross-station square bridge with 10.6 m fill behind the abutment as an example,a box chamber is proposed to set behind the abutment body,and the box abutment scheme with three rows of pile foundations in the longitudinal direction is adopted.According to the general layout of the bridge,the structural design of the new high-fill abutment is carried out and the finite element software is used to calculate and verify the feasibility of the abutment structure.The results show that each mechanical performance index of the abutment meets the specification requirements and it can be applied to the terrain with high fill behind the abutment.There is no need to slope in front of the abutment to ensure the passage space of the station square under the bridge.
high fillbox abutmentcross-station square bridgestructural calculation
NETL
NSTL
万方数据
