High embankment filling bridgehead sedimentation preventing structure

Abstract

The invention relates to a high embankment filling bridgehead sedimentation preventing structure which comprises a bridge abutment, a pile foundation structure (12), a pavement structure layer (1), an approach slab structure layer (2) and a roadbed layer (5). The pavement structure layer (1) is laid on the approach slab structure layer (2). The high embankment filling bridgehead sedimentation preventing structure is characterized in that one end of the approach slab structure layer (2) is built on a bridge abutment bracket (11), the pile foundation structure (12) is arranged below the approach slab structure layer (2), the approach slab structure layer (2) and the pile top of the pile foundation structure (12) are connected to form a two-span or multi-span cast-in-place continuous plate structure, a plain concrete layer (3) and a broken stone hardcore (4) are sequentially arranged below the approach slab structure layer (2), and the broken stone hardcore (4) is laid on the roadbed layer (5). Compared with the prior art, the high embankment filling bridgehead sedimentation preventing structure has the advantages that transition between a road and a bridge is smooth, and bridgehead sedimentation preventing performance is excellent.

Description

technical field [0001] The invention relates to a bridge head anti-settlement structure, in particular to a bridge head anti-settlement structure filled with high embankment. Background technique [0002] At present, in the construction of bridges, the joint position between the road and the bridgehead usually causes differential settlement between the road surface and the bridge surface due to the difference in the foundation stiffness of the subgrade pavement and the bridge structure, resulting in uncomfortable driving and even safety accidents. In the prior art, the bridge head slab is usually used to prevent the settlement of the bridge head. In this technology, the concrete slab is placed between the end of the abutment and the filling soil, and can be rotated as the filling soil settles. [0003] Chinese patent ZL201220025591.4 discloses a settlement-preventing bridge head structure, including a bridge head base for supporting the main girder, and a roadbed on the side...

AI Technical Summary

Problems solved by technology

The above-mentioned patent obtains a certain anti-settling effect of the bridge head by adopting the structure of the bridge head slab, but when the height of the fill behind the abutment is high, due to the problems of foundation settlement, roadbed fill loss, and roadbed fill not reaching the degree of compaction, etc. , resulting in gapping between the slab structure and the subgrade filling, resulting in breakage of the knuckles of the slab structure, etc. Therefore, even if the slab is installed, there is still the phenomenon of bridge head jumping

Images