Method for treating outward inclining of bridge abutment

Abstract

The invention discloses a method for treating outward inclining of a bridge abutment. Reinforcing sections (3) are prefabricated, planted bars (21) are arranged on the side face of an abutment cap ofan original bridge abutment (1), reinforcing steel bars are tied and a bridge abutment counter-force beam (2) is cast in situ, the reinforcing sections (3) are vertically hoisted to to-be-reinforced positions under the bridge abutment counter-force beam (2), a jack (4) is installed on the lower side of the bridge abutment counter-force beam (2), an integral structure composed of the bridge abutment counter-force beam (2) and the original bridge abutment (1) serves as a counter-force device by adopting a jack (4) pressurizing method, and the reinforcing sections (3) are sequentially pressed todesigned positions downwards; and in order to enable the reinforcing sections (3) and the original bridge abutment (1) to be stressed jointly, after downward pressing work of all the reinforcing sections (3) is completed, the jack (4) is removed, combination sections (31) are cast in situ, the combination sections (31) and the reinforcing sections (3) are consolidated and then integrated with thebridge abutment counter-force beam (2), and treatment of bridge abutment outward inclining is achieved. According to the method for treating outward inclining of the bridge abutment, the whole is broken up into parts, the design is flexible, the reinforcing process is convenient and rapid, bridge floor traffic is not affected, large equipment is not needed, the bearing capacity of the original bridge abutment is improved, correcting, decreasing and preventing effects on outward inclining of the original bridge abutment can further be achieved, and the bridge abutment can be rapidly reinforcedunder the premise that it is ensured that original design functions are not changed.

Description

technical field [0001] The invention belongs to the field of civil engineering, and relates to a bridge reinforcement technology, in particular to a treatment method for abutment camber. Background technique [0002] In addition to transmitting the load of the bridge superstructure to the foundation, the abutment also has the functions 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. For the bridge abutment, the plastic flow of the soft soil foundation produces a strong thrust toward the center of the river channel, which causes the abutment to tilt and displace toward the center of the river channel, resulting in instability and failure. When the amount of movement is large, the back wall of the abutment will be damaged, and cause local buckling, cracking and breaking of the main girder near the end of the abutment. The causes of the abutmen...

AI Technical Summary

Problems solved by technology

The new auxiliary retaining wall method can effectively increase the thrust stiffness of the abutment, but it cannot bear the load of the superstructure together with the abutment, and it needs to be poured on site, and the construction period is long; the disadvantage of the load reduction method is that it cannot fundamentally strengthen the original structure. There is an abutment; the foundation pile grouting method mainly relies on improving the friction force around the pile to increase the bearing capacity of the foundation pile, and the thrust resistance stiffness of the abutment is hardly improved

In addition, the mechanical equipment required by the traditional abutment camber reinforcement method is easily restricted by the surrounding site, geology, traffic and other conditions of the abutment, which is inconvenient for construction

Images