CN218621881U

CN218621881U - Cable-stayed buckling system for installing arch rib at arch foot of half-through steel box basket arch bridge

Info

Publication number: CN218621881U
Application number: CN202223153253.1U
Authority: CN
Inventors: 周建军; 张敏; 朱晓亮; 张�杰; 杨旭; 张梵; 李帅; 王锦超
Original assignee: Road and Bridge International Co Ltd; Road and Bridge East China Engineering Co Ltd
Current assignee: Road and Bridge International Co Ltd; Road and Bridge East China Engineering Co Ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-03-14
Anticipated expiration: 2032-11-24

Abstract

The utility model relates to a hang system is detained to cable-stay that is used for well to hold formula steel case hand-basket arch bridge arch foot department arch rib installation, including two pylons, two pylons are fixed respectively to be set up on the hunch seat of bridgehead both sides, every pylon includes two steel stands, the coexistence post is in the same direction as the bridge and is set up and have a determining deviation around to, anchor assembly anchor on every stand lower extreme and the hunch seat, welding parallel and bridging between the coexistence post, establish an oblique stay bar between every stand and the hunch seat top surface outside, in the same direction as the bridge between coexistence post upper end to a welding anchor beam, be connected with the knot between anchor beam front end and the arch foot department arch rib, be connected with the backstay between the anchor assembly on rear end and the hunch seat. The utility model discloses can realize several sections arch rib of hunch foot department and draw to one side and detain the string, reduce the moment of flexure of hunch foot department arch rib, guarantee construction safety.

Description

Cable-stayed buckling system for installing arch rib at arch foot of half-through steel box basket arch bridge

Technical Field

The utility model belongs to the technical field of the bridge construction, a mounting construction of well formula steel case arched bridge arch rib is related to, concretely relates to a hang system is detained to cable-stay that is used for well formula steel case hand-basket arched bridge arch rib arch springing department installation.

Background

The arch rib of the half-through steel box basket arch bridge is usually hoisted by a cable crane and is matched with a buckling tower to be obliquely pulled and buckled for arch rib installation and construction. Because the arch rib of the basket type arch bridge is gradually inclined from the outer side of the bridge to the inner side of the bridge, the arch rib is influenced by a boundary pier in the construction process, and a plurality of sections of arch ribs at the arch springing position cannot be connected with buckling ropes between buckling towers due to low height, so that the cantilever of the arch springing arch rib is too large, and potential safety hazards exist. The existing solution is to set up a floor stand below the arch rib at the arch foot for supporting, but the method has large material consumption and long mounting period of the stand, and the difficulty of setting up the stand is large because the river or the canyon is often below the arch rib.

Disclosure of Invention

The utility model aims at the above-mentioned problem, a pull to one side and detain a system of hanging that is used for well formula steel case hand-basket arched bridge arch foot arch rib installation, guarantee arch foot department arch rib construction safety to reduce the support material quantity.

The technical scheme of the utility model as follows:

the utility model provides a hang system is detained to cable-stay that is used for well to hold formula steel case hand-basket arched bridge arch foot arch rib installation, its characterized in that: the two towers are respectively fixedly arranged on the arch seats at the two sides of the bridge head; a plurality of groups of anchoring parts are pre-embedded on the arch support, each tower frame comprises two steel upright columns, the two upright columns are arranged in the front and back direction of the bridge and have a certain distance, the lower end of each upright column is anchored with the anchoring part on the arch support, a parallel connection and a cross brace are welded between the two upright columns, an inclined strut is arranged between each upright column and the outer side of the top surface of the arch support, the upper end of the inclined strut is welded with the upright column, and the lower end of the inclined strut is anchored with the pre-embedded part on the arch support; an anchoring beam is welded between the upper ends of the two vertical columns along the bridge direction, a buckling cable is connected between the front end of the anchoring beam and an arch rib at the arch springing position, and a reverse pulling cable is connected between the rear end of the anchoring beam and an anchoring piece on the arch support.

The utility model is used for the installation and construction of arch ribs at the arch foot of the half-through steel box basket arch bridge, can realize the cable-stayed buckling of a plurality of sections of arch ribs at the arch foot, reduce the bending moment of the arch ribs at the arch foot and ensure the construction safety; the height of the tower frame meets the requirement that the front arch ribs of the arch springing are hung in a mode of inclined pull buckles, the structure is simple, the height is low, and compared with the existing support method, the material consumption is small; the tower is arranged on the arch support, so that the installation speed is high, and the construction difficulty is low.

Drawings

FIG. 1 is a schematic side view of the present invention along the bridge direction;

fig. 2 is a schematic structural view of a transverse bridge vertical surface of the present invention;

FIG. 3 is an enlarged view of the upper end of the tower taken along the bridge;

FIG. 4 is an enlarged view of the cross bridge at the upper end of the tower.

Detailed Description

As shown in fig. 1 and 2, a junction pier 10 is arranged at the bridge head of the half-through steel box basket arch bridge, and arch seats 9 are respectively arranged at two sides of the half-through steel box basket arch bridge. The cable suspension buckle tower is positioned at the rear part of the junction pier, and when the arch rib is installed and constructed, because the height of the arch rib 8 at the arch foot is lower, and the arch rib inclines towards the inner side of the bridge, the cable suspension buckle tower can not be installed between the cable suspension buckle tower and the arch rib at the arch foot due to the blockage of the junction pier.

In order to solve the above problem, the utility model discloses fixed two pylons that set up on the hunch seat of bridgehead both sides for detain and hang the arch rib of hunch foot department.

When the hunch seat construction, pre-buried multiunit anchor assembly 7 on the hunch seat in advance, every group anchor assembly includes a pre-buried steel sheet, wears to establish many anchor muscle on the pre-buried steel sheet, and anchor muscle lower extreme is pre-buried to the hunch seat in the concrete.

Each tower comprises two steel upright posts 1, the two upright posts are arranged in the front and back direction of the bridge and have a certain distance, the lower end of each upright post is anchored with an anchoring part 7 on the arch support, a parallel connection and a cross brace 2 are welded between the two upright posts 1, an inclined strut 3 is arranged between each upright post 1 and the outer side of the top surface of the arch support, the upper end of each inclined strut 3 is welded with the upright post 1, and the lower end of each inclined strut is anchored with an embedded part 7 on the arch support; an anchoring beam 4 is welded between the upper ends of the two upright posts 1 along the bridge direction, a buckle cable 5 is connected between the front end of the anchoring beam 4 and an arch rib 8 at the arch springing position, and a backstay 6 is connected between the rear end of the anchoring beam 4 and an anchoring part 7 on the arch support. The reverse guy cable is used for balancing the pulling force generated to the tower when the arch rib is hung on the buckling cable buckle, and the stability of the tower is ensured.

As shown in fig. 3 and 4, the top surfaces of both ends of the anchoring beam 4 are respectively provided with an anchoring plate 41, and the tensioning ends of the lanyard 5 and the backstay 6 are both arranged on the anchoring beam and are respectively anchored with the anchoring plates 41 on the anchoring beam.

According to the structure, the two towers are positioned on two sides of the junction pier, the buckling ropes 5 between the towers and the arch rib at the arch foot are not influenced by the junction pier 10, buckling and hanging of the arch rib 8 at the arch foot can be realized, and downwarping caused by overlarge cantilever at the front end of the arch rib is avoided. After the installation of the arch rib at the arch springing position is finished, the subsequent installation of the arch rib segment can be buckled and hung between the cable suspension buckle tower in a normal construction mode.

Claims

1. The utility model provides a hang system is detained to cable-stay that is used for well to hold formula steel case hand-basket arched bridge arch foot arch rib installation, its characterized in that: comprises two towers which are respectively fixedly arranged on arch supports at two sides of a bridge head; a plurality of groups of anchoring parts are embedded in the arch support, each tower frame comprises two steel upright posts, the two upright posts are arranged in the front and back direction of the bridge and have a certain distance, the lower end of each upright post is anchored with the anchoring part on the arch support, a parallel connection and a cross brace are welded between the two upright posts, an inclined strut is arranged between each upright post and the outer side of the top surface of the arch support, the upper end of the inclined strut is welded with the upright posts, and the lower end of the inclined strut is anchored with the embedded part on the arch support; an anchoring beam is welded between the upper ends of the two vertical columns along the bridge direction, a buckling cable is connected between the front end of the anchoring beam and an arch rib at the arch springing position, and a reverse pulling cable is connected between the rear end of the anchoring beam and an anchoring piece on the arch support.

2. The cable-stayed suspension system for arch rib installation at the arch springing of the half-through steel box and basket arch bridge as claimed in claim 1, wherein: and the top surfaces of the two ends of the anchoring beam are respectively provided with an anchoring plate, and the tensioning ends of the buckle cable and the reverse cable are arranged on the anchoring beam and are respectively anchored with the anchoring plates on the anchoring beam.