CN-121977803-A - Suspension bridge deck hoisting test method

CN121977803ACN 121977803 ACN121977803 ACN 121977803ACN-121977803-A

Abstract

The invention relates to the technical field of bridge deck hoisting test methods, in particular to a suspension bridge deck hoisting test method. The technical scheme includes that a suspension device is arranged on the side edge of a bridge deck, the bridge deck is suspended and installed through the suspension device, a pressing component for applying pressure to the bridge deck is arranged above a to-be-detected point of the bridge deck, a strain gauge is arranged at a key position of the bridge deck, a distance adjusting mechanism is arranged below the bridge deck, a plurality of displacement sensors for detecting the vertical displacement of the bridge deck are arranged on the distance adjusting mechanism, the displacement sensors are attached to the bridge deck, the distances among the displacement sensors are kept equal through the distance adjusting mechanism, and the displacement sensors are moved to a detection point of the vertical displacement of the bridge deck. According to the invention, the distance between the plurality of displacement sensors is equidistantly adjusted through the distance adjusting mechanism, the distance between two adjacent mounting blocks can be kept equal, and the adjusting efficiency and the adjusting precision can be effectively improved, so that the response of the bridge deck under the uniformly distributed load can be evaluated.

Inventors

LUO SHENGHONG
ZHOU GUANNAN
ZHANG HANSHUO
FAN LILONG
XIAO FEIZHI
ZHUANG LIANGDONG

Assignees

中国铁建大桥工程局集团有限公司
清华大学

Dates

Publication Date: 20260505
Application Date: 20251231

Claims (10)

1. The suspension bridge deck hoisting test method is characterized by comprising the following steps of: a suspension device is arranged on the side edge of the bridge deck (6), the bridge deck (6) is suspended and arranged through the suspension device, and a pressing component for applying pressure to the bridge deck is arranged above a point to be tested of the bridge deck (6); The method comprises the steps that strain gauges are arranged at key positions of a bridge deck (6), a distance adjusting mechanism is arranged below the bridge deck (6), and a plurality of displacement sensors (8) for detecting the vertical displacement of the bridge deck (6) are arranged on the distance adjusting mechanism, so that the displacement sensors (8) are attached to the bridge deck (6); The distance between the displacement sensors (8) is controlled to be equal through the distance adjusting mechanism, and the distance between the two adjacent sensors (8) is adjusted according to the response test requirement of the bridge deck (6) under the uniformly distributed load, so that the displacement sensors (8) move to the detection point of the vertical displacement of the bridge deck (6).
2. The suspension bridge deck hoisting test method according to claim 1, wherein the suspension device comprises an overhanging cantilever bracket (2) fixedly installed on the structural column (1), and a boom (3) is fixedly installed on the overhanging cantilever bracket (2).
3. A suspension bridge deck hoisting test method according to claim 2, characterized in that the suspension rod (3) comprises a pull rod (301) fixedly mounted on an overhanging cantilever bracket (2), a threaded sleeve (302) is rotatably mounted on the pull rod (301), a connecting rod (303) is connected with the threaded sleeve (302) in an internal thread manner, and the connecting rod (303) is fixedly connected with the bridge deck (6).
4. A suspension bridge deck hoisting test method according to claim 3, characterized in that a force sensor (4) is fixedly installed at the top of the boom pull rod (301), and the force sensor (4) is located on the upper side of the upper flange of the overhanging cantilever corbel (2).
5. The suspension bridge deck hoisting test method according to claim 2, wherein the structural column (1) adopts an I-shaped steel structure, the overhanging cantilever corbel (2) adopts a double-web structure with stiffening ribs, the hanging rod (3) is positioned between two webs of the overhanging cantilever corbel (2), the overhanging cantilever corbel (2) is fixedly connected with the flange of the structural column (1) through an end plate by using high-strength bolts, and the hanging rod (3) penetrates through the overhanging cantilever corbel (2) and is fixedly connected with the overhanging cantilever corbel (2) through the high-strength bolts.
6. The suspension bridge deck hoisting test method according to claim 1, wherein the pressing component comprises a counter-force bracket (5), a support frame (501) is fixedly installed on the counter-force bracket (5), a cross beam (502) is fixedly installed on the support frame (501), and a hydraulic rod (503) is adjustably installed on the cross beam (502).
7. The suspension bridge deck hoisting test method according to claim 1, wherein the distance adjusting mechanism comprises a bottom plate (7), a sliding frame (701) is slidably mounted on the bottom plate (7), a sliding rod (702) is fixedly mounted on the sliding frame (701), a plurality of mounting blocks (703) are fixedly mounted on the sliding rod (702), the mounting blocks (703) are in one-to-one correspondence with the displacement sensors (8), the displacement sensors (8) are fixedly mounted on the mounting blocks (703), a supporting plate (704) is fixedly mounted on the sliding frame (701), a telescopic rod (705) is fixedly mounted on the supporting plate (704), a lifting plate (706) is fixedly mounted at the other end of the telescopic rod (705), a plurality of connecting blocks (707) are slidably mounted on the lifting plate (706), connecting rods (708) are rotatably mounted at two ends of the connecting blocks (707), the connecting rods (708) are rotatably connected with the adjacent mounting blocks (703), a screw rod (709) is rotatably mounted on the lifting plate (706), and the screw rod (709) is in threaded connection with the screw rod (704).
8. The suspension bridge deck hoisting test method according to claim 7, wherein a driving assembly for driving the carriage (701) to slide is mounted on the base plate (7), the driving assembly comprises a motor (710) fixedly mounted on the base plate (7), a distance adjusting rod fixedly mounted on the output of the motor (710), and a transmission rod (712) rotatably mounted on the distance adjusting rod, and the transmission rod (712) is rotatably connected with the carriage (701).
9. The suspension bridge deck hoisting test method according to claim 8, wherein the distance adjusting rod comprises a connecting sleeve (711) fixedly installed on an output shaft of the motor (710), an extension rod (713) is slidably installed in the connecting sleeve (711), a threaded rod (714) is rotatably installed on the extension rod (713), and the threaded rod (714) penetrates through the bottom of the connecting sleeve (711) and is in threaded connection with the connecting sleeve (711).
10. The suspension bridge deck hoisting test method according to claim 8, wherein the displacement sensor (8) is fixedly provided with a roller (801).

Description

Suspension bridge deck hoisting test method Technical Field The invention relates to the technical field of bridge deck hoisting test methods, in particular to a suspension bridge deck hoisting test method. Background The suspension bridge deck hoisting test is an important experiment carried out in the construction process of the suspension bridge, and aims to verify the design safety of a deck hoisting system and the feasibility of a construction scheme. Whether the design of the bridge deck hoisting system can meet the structural safety and functional requirements can be verified through experiments. The test result can provide basis for optimizing the construction scheme, such as adjusting the hoisting equipment, the position of the hoisting point or the construction process. Potential risk points can be identified through hoisting tests, and measures can be taken in advance to prevent possible problems. In a suspension bridge deck hoisting test, a plurality of displacement sensors are arranged in a very critical step, so that deformation conditions of the bridge deck under different working conditions can be comprehensively monitored. In evaluating the response of a deck under uniformly distributed loads, it is advantageous to maintain equal spacing between sensors. Thus, uniformity and comparability of data can be ensured, and deformation characteristics of the whole bridge deck can be conveniently analyzed. However, the existing device cannot quickly adjust the positions of the displacement sensors, and cannot ensure that the distances between two adjacent displacement sensors are kept in an equal state. Disclosure of Invention The invention aims to solve the problems in the background art and provides a suspension bridge deck hoisting test method. The technical scheme of the invention is that the suspension bridge deck hoisting test method comprises the following steps: Installing a suspension device on the side edge of the bridge deck, performing suspension installation on the bridge deck through the suspension device, and installing a pressure applying component for applying pressure to the bridge deck above a to-be-detected point of the bridge deck; A strain gauge is arranged at a key position of the bridge deck, a distance adjusting mechanism is arranged below the bridge deck, a plurality of displacement sensors for detecting the vertical displacement of the bridge deck are arranged on the distance adjusting mechanism, and the displacement sensors are attached to the bridge deck; The distance between the displacement sensors is kept equal through the distance adjusting mechanism, and the distance between the two adjacent sensors is adjusted according to the response test requirement of the bridge deck under the uniformly distributed load, so that the displacement sensors move to the bridge deck vertical displacement detection point positions. Optionally, the suspension device includes an overhanging cantilever bracket fixedly mounted on the structural post, and a boom is fixedly mounted on the overhanging cantilever bracket. Optionally, the jib includes the pull rod of fixed mounting on overhanging cantilever bracket, rotate on the pull rod and install the thread bush, thread bush internal thread is connected with the connecting rod, the connecting rod with bridge floor fixed connection. Optionally, a force sensor is fixedly installed at the top of the boom pull rod and is located on the upper side of the upper flange of the overhanging cantilever bracket. Optionally, the structure post adopts I-shaped steel construction, and overhanging cantilever bracket adopts the double-web structure of taking the stiffening rib, and the jib is located between two webs of overhanging cantilever bracket, and overhanging cantilever bracket uses high strength bolt fixed connection through end plate and structure post flange, the jib link up and wears overhanging cantilever bracket, through high strength bolt and overhanging cantilever bracket fixed connection. Optionally, the pressure part includes the counter-force support, fixed mounting has the support frame on the counter-force support, fixed mounting has the crossbeam on the support frame, adjustable install the hydraulic stem on the crossbeam. Optionally, the roll adjustment mechanism includes the bottom plate, slidable mounting has the balladeur train on the bottom plate, fixed mounting has the slide bar on the balladeur train, fixed mounting has a plurality of installation pieces on the slide bar, the installation piece with displacement sensor one-to-one, displacement sensor fixed mounting is on the installation piece, balladeur train fixed mounting has the backup pad, fixed mounting has the telescopic link in the backup pad, the other end fixed mounting of telescopic link has the lifter plate, slidable mounting has a plurality of connecting blocks on the lifter plate, the connecting rod is all installed in the rotation at the both ends of connecting b