CN-121675309-B - Intelligent beam end displacement induction seam-crossing type bridge expansion device and installation method thereof

CN121675309BCN 121675309 BCN121675309 BCN 121675309BCN-121675309-B

Abstract

The invention belongs to the field of bridge engineering, and particularly relates to an intelligent beam end displacement sensing seam crossing type bridge expansion device and an installation method thereof, wherein the intelligent beam end displacement sensing seam crossing type bridge expansion device is arranged on an expansion joint between adjacent beam ends, the expansion device comprises a displacement sensing assembly which spans the expansion joint, the displacement sensing assembly comprises a first hinge part, a second hinge part, a telescopic rod and a displacement sensor, two ends of the telescopic rod are respectively connected with the first hinge part and the second hinge part, the first hinge part is arranged on the beam end on one side of the expansion joint, the second hinge part is arranged on a detection opposite end, a first axis and a second axis are arranged on the first hinge part and the second hinge part, the first axis is arranged along a Z axis, the second axis has the degree of freedom of swinging in an XY plane by means of the first axis, the telescopic rod can rotate around the first axis and the second axis on the first hinge part and the second hinge part, and the expansion device can accurately capture multi-azimuth displacement of the beam end, so as to provide safety early warning for a beam body.

Inventors

LI YANQING
GONG GUOJIN
YUAN ZHOU
QIU ZHANGJUN
DUAN BAOBIN
XIA PINGJUN
WANG JINYONG
JIA XIAOWEI
YAN LEI

Assignees

衡水宏祥桥梁工程材料科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260209

Claims (4)

1. The intelligent beam end displacement sensing span joint type bridge expansion device mounting method is characterized in that the expansion device is arranged on an expansion joint (1) between adjacent beam ends and comprises a displacement sensing assembly, the displacement sensing assembly comprises a first hinge part (3), a second hinge part (4), a telescopic rod (5) and a displacement sensor (6), the first hinge part (3) is arranged on the beam end on one side of the expansion joint (1), the second hinge part (4) is arranged at the opposite detection end, two ends of the telescopic rod (5) are respectively connected with the first hinge part (3) and the second hinge part (4), the first hinge part (3) and the second hinge part (4) respectively comprise an inner ring (10), a middle ring (11) and an outer ring (12), the inner ring (10), the middle ring (11) and the outer ring (12) are hinged by means of a hinge shaft (13), the hinge shaft (13) is respectively arranged along a first axis and a second axis, the first axis and the second axis (10) are respectively connected with the outer ring (12) in a rotating mode, and the hinge shaft (10) is fixedly connected with the inner ring (10) and the middle ring (12) by means of the hinge shaft (13) in turn, the displacement sensor (6) is arranged on the first hinge part (3) or the second hinge part (4) and is used for detecting the displacement change of the telescopic rod (5); The deflection sensor (6) comprises a first angular displacement sensor (601), a second angular displacement sensor (602) and an axial displacement sensor (603), wherein the first angular displacement sensor (601) is arranged on an intermediate ring (11) of the first hinge part (3) and used for detecting the rotation angle of an inner ring (10) of the first hinge part (3), the second angular displacement sensor (602) is arranged on an outer ring (12) of the first hinge part (3) and used for detecting the rotation angle of the intermediate ring (11) of the first hinge part (3), and the axial displacement sensor (603) is fixedly connected with the inner ring (10) of the first hinge part (3) or the second hinge part (4) and used for detecting the telescopic length of the telescopic rod (5); The telescopic rod (5) comprises a fixed end (501) and a telescopic end (502) which are mutually sleeved, the fixed end (501) and the telescopic end (502) are respectively connected with the inner ring (10) of the second hinge part (4) and the inner ring (10) of the first hinge part (3), and the axial displacement sensor (603) is arranged on the fixed end (501) and is used for detecting the telescopic length of the telescopic end (502) on the fixed end (501); The opposite detection end is a mounting frame (9) or a beam end at the other side of the expansion joint (1), and the mounting frame (9) is fixedly connected with the bridge pier (8) on the bridge pier (8) below the expansion joint (1); the installation method of the telescopic device comprises the following steps: s1, after the beam body (2) is installed, implanting anchor bolts on an installation base surface of the beam body (2) or a bridge pier (8), cleaning the installation base surface, and ensuring that the installation base surface is smooth and free of loose aggregate; S2, checking the first hinge part (3), the second hinge part (4) and the telescopic rod (5), ensuring that the rotatable parts of the first hinge part (3) and the second hinge part (4) rotate flexibly, enabling the telescopic rod (5) to stretch smoothly, and connecting the two ends of the telescopic rod (5) with the rotatable parts of the first hinge part (3) and the second hinge part (4); S3, locking and fixing rotatable parts of the first hinge part (3) and the second hinge part (4), so that the axial direction of the telescopic rod (5) is perpendicular to the first hinge part (3) and the second hinge part (4) respectively; S4, installing the first hinge part (3) and the second hinge part (4) on respective installation base surfaces by means of anchor bolts, calibrating the reference of each deflection sensor (6), and unlocking the rotatable parts of the first hinge part (3) and the second hinge part (4); s5, calculating the change of the relative displacement between the beam bodies (2) at the two ends of the expansion joint (1) by collecting monitoring signals of each deflection sensor (6), and monitoring the displacement of the beam bodies (2) at the two ends of the expansion joint (1).
2. The method for installing the intelligent beam-end displacement sensing span joint type bridge expansion device is characterized in that the displacement sensing assembly spans an expansion joint (1), the first axis is arranged along a Z axis, the second axis has the degree of freedom of swinging in an XY plane by means of the first axis, the expansion link (5) can rotate on the first hinge part (3) around the first axis and the second axis of the first hinge part (3), and the expansion link (5) can rotate on the second hinge part (4) around the first axis and the second axis of the second hinge part (4).
3. The method for installing the intelligent beam-end displacement induction span joint type bridge expansion device is characterized in that the expansion rod (5) is arranged on the expansion joint (1) in a span mode by means of the first hinging part (3) and the second hinging part (4).
4. The method for installing the intelligent beam-end displacement induction span joint type bridge expansion device is characterized in that two sides of the installation frame (9) are respectively provided with a group of deflection induction components, the first hinge parts (3) are respectively installed on beam ends on two sides of the expansion joint (1), and the second hinge parts (4) are respectively installed on the installation frame (9).

Description

Intelligent beam end displacement induction seam-crossing type bridge expansion device and installation method thereof Technical Field The invention belongs to the field of bridge engineering, and particularly relates to an intelligent beam end displacement induction joint-crossing type bridge expansion device and an installation method thereof. Background The bridge expansion device is a key stress part in a bridge structure, and has the core function of adapting to longitudinal, transverse and vertical displacement of a bridge under the actions of temperature change, vehicle load, foundation settlement, concrete shrinkage creep and the like. Along with the increase of the service life of the bridge, the expansion device is easy to age and damage due to repeated stress, environmental erosion and other problems, and the abnormal change of the displacement of the beam end is often an early signal of the germination and development of the bridge structure, if the displacement information cannot be captured in time and timely judged and repaired, the linkage faults such as the connection failure of the beam body, the bridge deck breakage and the like are easily caused, and even the safety of the bridge structure is threatened when serious. Therefore, the bridge expansion device capable of accurately capturing multi-directional displacement of the beam end is designed, and the technical requirement to be solved is urgent in the field of bridge engineering. Disclosure of Invention In order to solve the problems in the prior art, the invention provides the intelligent beam end displacement induction slit-type bridge expansion device and the installation method thereof, which can accurately capture the multidirectional displacement of the beam end and provide safety pre-warning for the beam body. The invention adopts the specific technical scheme that: the intelligent beam end displacement sensing seam crossing type bridge expansion device is arranged on an expansion joint between adjacent beam ends, and is characterized in that the expansion device comprises a displacement sensing assembly which is arranged on the expansion joint in a crossing mode, the displacement sensing assembly comprises a first hinge part, a second hinge part, a telescopic rod and a displacement sensor, two ends of the telescopic rod are respectively connected with the first hinge part and the second hinge part, the first hinge part is arranged on one side of the expansion joint, the second hinge part is arranged at a detection opposite end, the telescopic rod is provided with a degree of freedom of expansion between the first hinge part and the second hinge part, the first hinge part and the second hinge part are respectively provided with a first axis and a second axis, the first axis is arranged along a Z axis, the second axis is provided with a degree of freedom of swinging in an XY plane by means of the first axis, the telescopic rod can rotate around the first axis and the second axis of the first hinge part, the telescopic rod can rotate around the first axis and the second axis of the second hinge part on the second hinge part, and the telescopic rod can rotate around the first axis and the second axis of the second hinge part or the second hinge part; The first hinge part and the second hinge part comprise an inner ring, a middle ring and an outer ring, the inner ring, the middle ring and the outer ring are hinged in sequence by virtue of hinge shafts, the hinge shafts are respectively arranged along a first axis and a second axis, the inner ring is provided with a degree of freedom which rotates on the outer ring around the first axis and the second axis by virtue of the hinge shafts and the middle ring, and the end parts of the telescopic rods are respectively connected with the inner ring. The detection opposite end is a beam end at the other side of the expansion joint, and the expansion rod is arranged on the expansion joint in a crossing way by virtue of the first hinging part and the second hinging part. The detection opposite end is the mounting bracket, the mounting bracket is located on the pier of expansion joint below and links firmly with the pier, and the both sides of mounting bracket set up a set of response subassembly that shifts respectively, first articulated part install respectively on the beam-ends of expansion joint both sides, second articulated part install respectively on the mounting bracket. The deflection sensor comprises a first angular displacement sensor, a second angular displacement sensor and an axial displacement sensor, wherein the first angular displacement sensor is arranged on the middle ring of the first hinge part and used for detecting the rotation angle of the inner ring of the first hinge part, the second angular displacement sensor is arranged on the outer ring of the first hinge part and used for detecting the rotation angle of the middle ring of the first hinge part, and the axial di