CN214530154U

CN214530154U - Assembled anti-seismic facility of bridge girder

Info

Publication number: CN214530154U
Application number: CN202022944989.5U
Authority: CN
Inventors: 张海波; 徐德标; 何维利; 黄宜; 赵维贺; 秦大航
Original assignee: Beijing General Municipal Engineering Design and Research Institute Co Ltd
Current assignee: Beijing General Municipal Engineering Design and Research Institute Co Ltd
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-10-29
Anticipated expiration: 2030-12-10

Abstract

The utility model discloses a spliced anti-seismic facility of a bridge girder, an anti-seismic steel anchor rod is pre-embedded at the top of a lower structure, four steel anchor rods are pre-embedded at the bottom surface of the upper structure, the four steel anchor rods are distributed in a rectangular shape, the anti-seismic steel anchor rods are arranged at the middle positions relative to the four steel anchor rods, the four steel anchor rods are sequentially connected with each other two by two through fixing holes at two ends of four steel backing plates, and the four steel backing plates and an upper pre-embedded steel plate are respectively fixed by bolts, so that the anti-seismic steel anchor rods of the lower structure are encircled to form a closed limiting space; the upper end part of the anti-seismic steel anchor rod penetrates through a fixing hole of a fifth steel base plate, and the fifth steel base plate is fixed through bolts and is lapped on the upper end surfaces of two symmetrical steel base plates in the four steel base plates. The utility model discloses can solve the structure that traditional all kinds of bridge antidetonation facility exist complicated, the suitability is poor, installation difficulty and pre-buried technical problem such as difficult.

Description

Assembled anti-seismic facility of bridge girder

Technical Field

The utility model relates to an improvement technique of bridge structures structure especially relates to the antidetonation technical field of bridge girder.

Background

The design of the anti-seismic facilities is a very important link in the design of bridges, and for conventional bridges, the main types of the anti-seismic facilities comprise concrete block type anti-seismic facilities, insert lug type anti-seismic facilities, pre-buried steel bars and reserved groove type anti-seismic facilities and the like.

The problems of complex structure, poor applicability, difficult installation, difficult pre-embedding and the like generally exist in the process of researching the existing anti-seismic facilities. The novel anti-seismic facility with stronger applicability, more convenient installation and simpler pre-burying is expected in engineering application.

Disclosure of Invention

The utility model aims at providing a pin-connected panel antidetonation facility of bridge girder to solve the structure complicacy that traditional all kinds of bridge antidetonation facilities exist, the suitability is poor, installation difficulty and pre-buried technical problem such as difficult.

In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

a split mounting type anti-seismic facility of a bridge girder is characterized in that an anti-seismic steel anchor rod in the vertical direction is pre-embedded at the top of a lower structure, four steel anchor rods in the vertical direction are pre-embedded at the bottom surface of an upper structure, the four steel anchor rods pre-embedded at the bottom surface of the upper structure are distributed in a rectangular shape, the anti-seismic steel anchor rod of the lower structure is arranged in the middle of the four steel anchor rods pre-embedded relative to the upper structure, the steel anchor rods pre-embedded at the upper part are sequentially connected in pairs through fixing holes at two ends of four steel backing plates, the four steel backing plates and a steel plate pre-embedded at the upper part are respectively fixed through bolts, and the anti-seismic steel anchor rod of the lower structure is encircled to form a closed limiting space; the upper end part of the anti-seismic steel anchor rod penetrates through a fixing hole of a fifth steel base plate, and the fifth steel base plate is fixed through bolts and is lapped on the upper end surfaces of two symmetrical steel base plates in the four steel base plates.

The four steel base plates are in rectangular distribution structures with unequal adjacent sides matched with the four steel anchor rods.

The diameters of the four steel anchor rods pre-embedded on the bottom surface of the upper structure are smaller than those of the anti-seismic steel anchor rods pre-embedded on the top of the lower structure.

The lower structure comprises pier stud capping beams or lower oxhorn, and the upper structure comprises main beams or upper oxhorn.

The utility model has the advantages of as follows:

1. the combined structure of anchor rod pre-embedding and backing plate is adopted to form an anti-seismic facility system, so that the application range is enlarged, and the combined structure can be applied to various bridge girder structures.

2. The combination of the embedded anchor bolts and the welding anchor bars is used, so that embedded components of the bent cap and the main beam are reduced, and the problem of conflict between the embedded bars and structural steel bars is avoided to the maximum extent;

3. through the utility model discloses in handle to the steel backing plate structure, make during bridge normal use, the girder vertically all has certain activity space with horizontal, for example above-mentioned facility can reserve the longitudinal bridge to +100mm, and the horizontal bridge is to +30 mm's activity space. Through the combined design of the embedded anchor bolts and the base plate, the anti-seismic facility has a vertical anti-pulling function;

4. this antidetonation facility uses pin-connected panel part, and partial component can realize damaging removable function, reduces the construction of large-scale component, has reduced the demand to installation space, has reduced the installation degree of difficulty, has made things convenient for workman's construction, maintenance etc..

Drawings

Fig. 1 is a plan view of the present invention.

Fig. 2 is a sectional view taken along a-a direction of fig. 1.

Fig. 3 is a cross-sectional view taken along the direction B-B of fig. 1.

Fig. 4 is an enlarged view of a middle portion C of fig. 3.

Fig. 5 is a schematic view of a pair of longer steel tie plates in the four steel tie plates of the present invention.

Fig. 6 is a top view of fig. 5.

Fig. 7 is a schematic view of a pair of shorter steel tie plates of the four steel tie plates of the present invention.

Fig. 8 is a top view of fig. 7.

Numbering in the figures: 1 is an anti-seismic steel anchor rod, 2 is one of four steel anchor rods, 3 is two of four steel anchor rods, 4 is three of four steel anchor rods, 5 is four of four steel anchor rods, 6 is a fifth steel base plate, 7 is a short base plate of four steel base plates, 8 is a long base plate of four steel base plates, 9 is another short base plate of four steel base plates, 10 is another long base plate of four steel base plates, 11 is one of nuts, 12 is two of nuts, 13 is a third of nuts, 14 is four of nuts, 15 is a main beam or an upper ox horn, and 16 is an abutment cover beam or a lower ox horn.

Detailed Description

The concrete structure example of a pin-connected panel antidetonation facility of bridge girder refer to shown in figure 1, 2, 3. The anti-seismic steel anchor rod with the vertical direction is pre-embedded at the top of the lower structure, four steel anchor rods with the vertical direction are pre-embedded in the bottom surface of the upper structure, the four pre-embedded steel anchor rods in the bottom surface of the upper structure are distributed in a rectangular mode, the anti-seismic steel anchor rods with the lower structure are arranged in the middle positions of the four pre-embedded steel anchor rods relative to the upper structure, the pre-embedded steel anchor rods on the upper portion are sequentially connected in pairs through fixing holes in the two ends of four steel base plates, the four steel base plates and the pre-embedded steel plates on the upper portion are fixed respectively through bolts, and then the anti-seismic steel anchor rods of the lower structure are encircled to form a closed limiting space.

Referring to fig. 4, the upper end of the anti-seismic steel anchor rod passes through a fixing hole of a fifth steel base plate, and the fifth steel base plate is fixed by bolts so as to be lapped on the upper end surfaces of two symmetrical steel base plates in the four steel base plates.

Referring to fig. 5, 6, 7 and 8, the four steel tie plates are in rectangular distribution structures with unequal adjacent sides matched with the four steel anchor rods.

The substructure comprises piers or capping beams and the superstructure comprises main beams.

In the embodiment shown in fig. 1, 2 and 3, an anchor rod 1 with the diameter of 64mm is pre-embedded on a pier column or a capping beam, and 4 anchor rods with the diameter of 48m are pre-embedded on an upper structural main beam.

The construction process comprises the following steps:

1. pre-burying an anti-seismic steel anchor rod 1 and pouring a lower structure;

2. positioning each component by adopting a positioning device, embedding a steel anchor rod 2, and assembling four nuts and four base plates in sequence; installing a fifth base plate, screwing up each part, and filling the end of the nut with sealant;

3. and pouring the superstructure, and removing the positioning device after the superstructure concrete reaches the strength.

The adjustable content in the construction measures of the utility model is mainly in three aspects:

1. can optimize above-mentioned bridge antidetonation facility according to the antidetonation requirement at engineering place, for example crab-bolt diameter, anchor backing plate size and thickness carry out optimal design to satisfy the demand of corresponding engineering.

2. The pre-buried position of the steel anchor rod can be adjusted according to the requirement of the longitudinal and transverse movement of the bridge;

3. the material of each component can be selected according to actual conditions, and a material with better durability is adopted as far as possible to ensure the service life.

Claims

1. The spliced anti-seismic facility of the bridge girder is characterized in that an anti-seismic steel anchor rod in the vertical direction is embedded at the top of a lower structure, four steel anchor rods in the vertical direction are embedded at the bottom surface of an upper structure, the four steel anchor rods embedded at the bottom surface of the upper structure are distributed in a rectangular shape, the anti-seismic steel anchor rods of the lower structure are arranged in the middle positions of the four steel anchor rods embedded relative to the upper structure, the steel anchor rods embedded at the upper part are sequentially connected in pairs through fixing holes at two ends of four steel backing plates, the four steel backing plates and an upper embedded steel plate are respectively fixed through bolts, and the anti-seismic steel anchor rods of the lower structure are encircled to form a closed limiting space; the upper end part of the anti-seismic steel anchor rod penetrates through a fixing hole of a fifth steel base plate, and the fifth steel base plate is fixed through bolts and is lapped on the upper end surfaces of two symmetrical steel base plates in the four steel base plates.

2. The spliced earthquake-resistant facility of a bridge girder according to claim 1, wherein the four steel base plates are rectangular distribution structures with unequal adjacent sides matched with the four steel anchor rods.

3. The spliced anti-seismic facility of a bridge girder according to claim 1, wherein the diameter of the four steel anchor rods pre-embedded at the bottom surface of the upper structure is smaller than that of the anti-seismic steel anchor rods pre-embedded at the top of the lower structure.

4. The spliced earthquake-resistant facility of a bridge girder according to claim 1, wherein the lower structure comprises pier cap beams or lower oxhorn beams, and the upper structure comprises a girder or upper oxhorn beams.