Novel road and bridge connection structure and construction method

Abstract

The novel road and bridge connection structure comprises a bridge abutment, a roadbed and light foam concrete in lap joint with the roadbed, the top of the light foam concrete bridge abutment is provided with an abutment cap, and the top of the roadbed side behind the abutment is sequentially provided with an anti-seepage geomembrane, two layers of geogrids internally provided with graded broken stones and a water stabilizer. An anti-seepage geomembrane, low-strength concrete and a butt strap are sequentially arranged on the side top of the bridge behind the abutment, and an asphalt pavement and a wall type guardrail are arranged on the top of the structure. According to the structure, the bridge abutment type is unified into a pile type bridge abutment which is not limited by the height of the bridge abutment, and the structure has the characteristics of flexible adjustment of the cone slope position, rigid-flexible transition, light weight and small occupied area; differential settlement at the joint of the road and the bridge can be effectively reduced, the stability of the roadbed and the bridge abutment is improved, the problem that the narrow space between the pier columns is difficult to compact is solved, the bridge scale can be controlled, the cost is saved, standardized operation is facilitated, the construction progress is accelerated, and good economic and technical benefits are achieved.

Description

technical field [0001] The invention relates to a novel road-bridge joint structure and construction method, in particular to a road-bridge joint structure and construction method for steep slope sections, high-fill sections or general geological sections. Bridge scale, cost saving, environmental protection, wide application range, controllable quality, simple process, especially suitable for abutment projects on steep slope sections, high fill sections or general geological sections. Background technique [0002] The design of the abutment structure not only needs to consider the load of the superstructure, but also factors such as earth pressure behind the abutment, topography and geology. Common abutment types include expanded foundation, ribbed abutment, piled abutment, etc. For abutments connected by roads and bridges, the backfilling construction behind the abutment generally belongs to bridge engineering and subgrade engineering, and the construction procedures overl...

AI Technical Summary

Problems solved by technology

For bridge abutments connected by roads and bridges, the backfill construction behind the abutments generally belongs to bridge engineering and subgrade engineering, and the construction procedures overlap each other, making it difficult to control the quality

The common problems in the road-bridge connection section are insufficient stability of the filling soil behind the abutment, slippery slopes and conical slopes in front of the abutment, which are difficult to compact and compact, and often have problems such as car jumping at the bridge head, and breakage of the slab.

[0003] The main disadvantages of the common abutment types are: the expansion of the foundation has higher requirements for the bearing capacity of the foundation, the amount of foundation excavation is large, the masonry volume is large, and the environmental protection and energy saving are poor.

Pile-column abutments have weak ability to resist horizontal earth pressure, and the applicable abutment height is small, so the scale of the bridge cannot be controlled

There are many construction steps in the ribbed abutment, and the size of the ribs varies with the height of the abutment, which is not conducive to construction and difficult to control the quality

For sections with complex terrain and geological conditions, there is often a problem that there is nowhere to repair the cone slope, and the cast-in-place concrete retaining wall is forced to be used for strong support. The increase of will induce new engineering problems

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