CN-117536144-B - Inertial falling reinforcement repairing method for bridge pier internal longitudinal ribs after earthquake damage

CN117536144BCN 117536144 BCN117536144 BCN 117536144BCN-117536144-B

Abstract

The invention discloses a method for repairing an inertial falling reinforcement of a longitudinal rib in a pier, which is damaged by an earthquake, wherein vertical reinforcement devices are uniformly distributed around the periphery of the outer wall of the pier, each reinforcement device comprises a mounting block, a reinforcement steel plate component, a limit switch component, a supporting component and a buckling component, the mounting block is pre-buried in the middle of the pier, the reinforcement steel plate component can slide up and down relative to the mounting block, the bottom of the supporting component is anchored on the ground, the bottom of the limit switch component is mounted through the supporting component, the top of the limit switch component is fixed on an embedded part of the pier, the buckling component is arranged under the reinforcement steel plate component, the bottom of the limit switch component is anchored on the ground, under normal conditions, the lower end of the reinforcement steel plate component is supported by the limit switch component, when the pier bends after the longitudinal rib in the pier is damaged by the earthquake, the structure of the reinforcement steel plate component is automatically opened, the reinforcement steel plate component falls down, the top of the pier is blocked by the installation block, and the pier is anti-bending and reinforced by the buckling component.

Inventors

JIANG LIQIANG
LIU XIAOZHI
LIU JUNTAO
JIANG LIZHONG
HU YI
GUO WEI
Wen Tianxing
WEI BIAO

Assignees

中南大学

Dates

Publication Date: 20260505
Application Date: 20231221

Claims (4)

1. A method for repairing the inertial falling reinforcement of a longitudinal rib in a pier after earthquake damage is characterized in that: the method comprises uniformly distributing vertical reinforcing devices along the periphery of the outer wall of a bridge pier; each reinforcing device comprises a mounting block, a reinforcing steel plate component, a limit switch component, a supporting component and a buckle component; the reinforced steel plate member comprises a vertical plate body and clamping connectors at the outer sides of two ends of the vertical plate body; the mounting block is pre-buried in the middle of the bridge pier, and the reinforced steel plate member can slide up and down relative to the mounting block; the limit switch assembly comprises two part structures symmetrically arranged on the left side and the right side of the reinforced steel plate member, each part structure comprises a horizontal supporting plate, an iron chain and a sleeve, the sleeve comprises a vertical section, a horizontal straight section, a horizontal L-shaped section and an embedded part, the lower end of the horizontal straight section is vertically connected with the lower end of the vertical section, the upper end of the horizontal L-shaped section is vertically connected with the lower end of the horizontal straight section, the vertical section and the lower end of the iron chain are connected to the middle position of the outer side of the length direction of the horizontal supporting plate and then penetrate through the sleeve, and the upper end of the vertical section and the lower end of the iron chain extend out of the sleeve and then are fixed on the embedded part at the top of the pier; The bottom of the supporting component is pre-buried on the ground, the bottom of the limit switch component is installed through the supporting component, and the top of the limit switch component is fixed on the embedded part of the pier; the buckling assembly comprises an inverted U-shaped body, clamping blocks, springs, pin shafts and pin shaft mounting blocks, wherein the pin shaft mounting blocks are symmetrically connected to two sides of the inverted U-shaped body, the clamping blocks are eccentric T-shaped blocks, the longer sections of wing plates of the clamping blocks are inserted into notches of the inverted U-shaped body and between the two pin shaft mounting blocks, the clamping blocks are rotatably mounted through the pin shafts, a pair of springs are mounted on the lower sides of the wing plates, the outer parts of web plates of the clamping blocks are positioned between the notches of the inverted U-shaped body, and a clamping structure for a clamping joint at the lower end of a reinforced steel plate member is formed between the inner sides of the top of the web plates and the bottom surfaces of the shorter sections of the wing plates; the buckle component is arranged right below the reinforced steel plate component, and the bottom is pre-buried on the ground; Under normal conditions, the lower extreme of reinforcement steel sheet component holds through limit switch subassembly, and the bridge pier produces crooked and crooked when reaching the design value after the inside longitudinal reinforcement of bridge pier of earthquake destruction, limit switch subassembly holds the structure of reinforcement steel sheet component and opens automatically, and reinforcement steel sheet component whereabouts, and the top is blocked through the installation piece, and the bottom is blocked the bending resistance reinforcement to the bridge pier through the buckle subassembly, realizes the bridge pier self-repairing.
2. The method for repairing the internal longitudinal ribs of the bridge pier according to claim 1, wherein the mounting blocks are provided with upper and lower through holes with the plane size larger than the cross dimension of the vertical plate body.
3. The method for repairing the pier internal longitudinal ribs by the inertia falling reinforcement after the earthquake damage according to claim 1, wherein the supporting component comprises a sleeve supporting rod and a supporting member of the horizontal supporting plate, the upper end of the sleeve supporting rod is fixed on the lower side of the horizontal L-shaped section, the bottom of the sleeve supporting rod is embedded in the ground, the supporting member comprises a U-shaped body with a horizontal opening and a supporting rod with a lower wing plate vertically connected, and the bottom of the supporting rod is embedded in the ground.
4. The method for repairing the pier internal longitudinal ribs by the falling inertia after earthquake damage according to claim 3, wherein the middle part of the horizontal supporting plate is arranged in the notch of the U-shaped body, and the lower ends of the reinforced steel plate members are supported by the two horizontal supporting plates together.

Description

Inertial falling reinforcement repairing method for bridge pier internal longitudinal ribs after earthquake damage Technical Field The invention belongs to the field of bridge seismic resistance, and particularly relates to a method for reinforcing and repairing an internal longitudinal rib of a bridge pier by falling down due to inertia after earthquake damage. Background The high-speed railway bridge plays a crucial role in the whole high-speed railway, so that the prevention of the damage of the high-speed railway bridge is an important matter. In the past earthquake, the earthquake damage of the bridge pier is mainly concentrated into the falling off of protective layer concrete, the crushing of core concrete and the yielding damage of longitudinal ribs in the plastic hinge area at the bottom. Wherein the bridge pier plays a role in supporting the girder and the track structure and transmitting the seismic load of the upper structure to the foundation. Therefore, the bridge pier is an indispensable key member of the bridge structure. However, most of the conventional bridge piers have the following drawbacks: 1. The longitudinal reinforcement ratio is controlled to ensure the ductility of the bridge pier, so that insufficient longitudinal reinforcement is arranged on the bridge pier during large earthquake, and the yield and damage of the longitudinal reinforcement are caused. 2. Residual displacement of the bridge pier caused by the earthquake is difficult to control. 3. The post-earthquake repair process of the bridge pier is complicated, and the repair is difficult to be completed rapidly after the bridge pier is damaged so as to resist the next earthquake. Disclosure of Invention The invention aims to provide a method for reinforcing and repairing the inner longitudinal ribs of the bridge pier by inertial falling after earthquake damage, which can overcome the defects. The invention provides a method for repairing the inertial falling reinforcement of a longitudinal rib in a pier due to earthquake damage, which adopts the following technical scheme that vertical reinforcement devices are uniformly distributed along the periphery of the outer wall of the pier; the bridge pier self-repairing device comprises a mounting block, a reinforcing steel plate component, a limit switch component, a supporting component and a buckle component, wherein the mounting block is pre-buried in the middle of a bridge pier, the reinforcing steel plate component can slide up and down relative to the mounting block, the bottom of the supporting component is anchored on the ground, the bottom of the limit switch component is installed through the supporting component, the top of the limit switch component is fixed on an embedded part of the bridge pier, the buckle component is arranged right below the reinforcing steel plate component, the bottom of the limit switch component is anchored on the ground, under normal conditions, the lower end of the reinforcing steel plate component is supported through the limit switch component, when the bridge pier bends after a longitudinal rib in the bridge pier is damaged by an earthquake and reaches a design value, the structural body of the reinforcing steel plate component is automatically opened by the limit switch component, the reinforcing steel plate component falls down, the top of the bridge pier is clamped through the mounting block, and the bottom of the bridge pier is clamped by the buckle component to resist bending and reinforce. When the method is implemented, the reinforced steel plate member comprises a vertical plate body and clamping joints at the outer sides of two ends of the vertical plate body. When the method is implemented, the mounting block is provided with the upper through hole and the lower through hole, and the plane size of the upper through hole is larger than the cross section size of the vertical plate body. When the method is implemented, the limit switch assembly comprises two part structures symmetrically arranged on the left side and the right side of the reinforced steel plate member, each part structure comprises a horizontal supporting plate, an iron chain and a sleeve, the sleeve comprises a vertical section, a horizontal straight section with the lower end vertically connected with the vertical section, and a horizontal L-shaped section with the upper end vertically connected with the vertical section, the lower end of the vertical section and the lower end of the iron chain are connected to the middle position of the outer side of the length direction of the horizontal supporting plate and then penetrate through the sleeve, and the upper end of the vertical section and the lower end of the iron chain extend out of the sleeve and then are fixed on an embedded part at the top of the pier. When the method is implemented, the supporting component comprises a sleeve supporting rod and a supporting member of the horizontal supporting plate, the up