Construction method of bridge abutment structure

Abstract

The invention discloses a construction method of a bridge abutment structure. The construction method comprises the steps that hole digging construction is conducted under the original ground; counterbores are formed in the positions, located on the peripheries of the dug holes, of the original ground, reinforcing steel bars are pre-buried in the counter bores, and concrete is poured to form a hollow concrete supporting table used for supporting the pipe culvert; the pipe culvert sections are sequentially installed on a concrete supporting table from top to bottom, the adjacent pipe culvert sections are connected through spigots, and after each pipe culvert section is spliced and reinforced, layered backfill compaction of the corresponding height needs to be conducted through roadbed filler; a reinforcement cage is put into the pipe culvert and a dug hole under the original ground, and concrete is poured at a time to form a reinforced concrete pile body; a bridge abutment is arrangedat the top of the reinforced concrete pile body. According to the construction method, pile foundation hole forming and backfilling are conducted synchronously, the construction period and the construction cost are saved, and the potential safety hazard of manual pile excavation is avoided.

Description

technical field [0001] The patent of the invention belongs to the technical field of pile foundation construction, and in particular relates to a construction method of an abutment structure. Background technique [0002] The abutment structure is a structure located at both ends of the bridge, supporting the superstructure of the bridge and connecting with the embankment. It generally includes the abutment pile foundation and the abutment set on the pile foundation. Its function is to transfer the load of the bridge superstructure to the foundation. It also has the function of resisting the filling pressure behind the abutment, stabilizing the subgrade at the bridge head, and making the bridge head line and the bridge line connect reliably and smoothly. [0003] In order to protect the stability of the bridge and the roadbed and prevent erosion, the tapered slopes are set on both sides of the abutment, and the section between the bottom of the abutment and the ground is fil...

AI Technical Summary

Problems solved by technology

However, the depth of the conventional manual digging construction method is usually relatively deep, and there is a greater safety risk. The manual digging construction with a larger depth also has the disadvantages of slow progress and high cost.

Conventional mechanical hole-forming construction methods are more common, but temporary facilities such as mud pools need to be set up, which may cause damage to the backfilled foundation, and mechanical hole-forming has disadvantages such as greater impact on the environment, long construction period, and high cost

Especially when the construction site is earth-rock stratum, because the bonding strength of the backfill part is low, the excavation is easy to collapse the hole

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