CN218712202U

CN218712202U - Device for placing middle cross beam on tie beam of tied arch bridge

Info

Publication number: CN218712202U
Application number: CN202222169352.2U
Authority: CN
Inventors: 庄国强; 俞海波; 吴超; 鲍廉梵; 傅珺; 鲁卓燕; 朱天瑞; 陈鹏
Original assignee: Hongrun Construction Group Co Ltd
Current assignee: Hongrun Construction Group Co Ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2023-03-24
Anticipated expiration: 2032-08-19

Abstract

A middle cross beam device of a tie-rod arch bridge is arranged on a tie beam, bracket devices are arranged at two ends of the middle cross beam, and 40-number I-steel, double-spliced 16-number channel steel, a draw bolt and the like are installed at the top of the middle cross beam. The position of the 40I-steel can not influence the position of the middle cross beam, namely the middle cross beam can not extend too far. After the middle cross beam is hoisted in place by a truck crane, the I-steel with the length of 5.2m is moved, the end head of the I-steel extends out of the position of the hoisting rod, then the middle cross beam falls on the batten pad on the tie beam, and a thin steel plate and a thin wood plate are prepared in advance for accurately adjusting the elevation of the batten pad, so that the elevation of the middle cross beam is in the butt joint position with the tie beam.

Description

Device for placing middle cross beam on tie beam of tied arch bridge

Technical Field

The invention relates to an equipment device used in bridge engineering.

Background

With the progress of society and the development of economy, large-scale structures are applied more and more, the span of the large-scale structures is larger and larger, the weight of the large-scale structures is heavier and heavier, the height of the large-scale structures is higher and higher, and the selection of the installation method can directly influence the safety of the structures, the difficulty of construction, the height of construction cost and the length of construction period. In the construction of roads and bridges, the tied arch bridge has more and more bridge types and various construction methods, and the specific construction method is determined according to site terrain conditions, bridge structures and equipment. In the construction of a tied arch bridge, the following method is generally adopted for mounting the middle cross beam: firstly, erecting a Bailey beam on a tie beam, then transporting a reinforced concrete middle cross beam to the lower side of the Bailey beam, tying a chain block on the Bailey beam, and lifting the middle cross beam to a designed position. The difficulty of this approach: the length of the Bailey beam is larger than the net distance between the steel pipe arch ribs, and the Bailey beam cannot be installed in place; the river is obliquely crossed with the main bridge, the flood control wall is also obliquely crossed with the main bridge frequently, and the middle cross beam is not placed at the flood control wall, so that the middle cross beam cannot be transported to the lower side of the Bailey beam, and the middle cross beam cannot be lifted to the designed position by the chain block.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the utility model provides a utility model's installation device can satisfy the requirement of intensity, rigidity, stability, and is with low costs simultaneously, safe and reliable, and the installation is dismantled conveniently, can reuse.

The technical scheme adopted by the invention for solving the technical problems is as follows: bracket devices are arranged at two ends of the middle cross beam, and 40 # I-steel, double-spliced 16 # channel steel, a draw rod bolt and the like are arranged at the top of the middle cross beam. The position of the 40I-steel cannot influence the position of the middle cross beam, namely, the middle cross beam cannot extend too far. After the middle cross beam is hoisted in place by a truck crane, the I-steel with the length of 5.2m is moved, the end head of the I-steel extends out of the position of the hoisting rod, then the middle cross beam falls on the batten pad on the tie beam, and a thin steel plate and a thin wood plate are prepared in advance for accurately adjusting the elevation of the batten pad, so that the elevation of the middle cross beam is in the butt joint position with the tie beam.

Compared with the prior art, the invention has the advantages that: compared with the traditional construction method, the method has the advantages of low cost, convenient construction, clear stress and easy popularization.

The device has the advantages of good stability, high safety and high lifting speed. The device can meet the requirements of strength, rigidity and integrity after being used for many times in practical engineering.

Drawings

FIG. 1 is a schematic front elevational view of the cross member of the present invention in place.

FIG. 2 is a schematic view of the middle cross member of the present invention in an elevational view after it has been installed in place.

FIG. 3 is a cross-sectional view of the tie-rod arch bridge of the present invention resting the center sill assembly on the tie-beam

Detailed Description

(1) The upper side and the lower side of the double-spliced 16-channel steel are welded by splicing plates, so that 2 pieces of 16-channel steel are connected into a whole.

(2) The finish-rolled deformed steel bar stay bolt with the diameter of 32mm is fixed by a backing plate and a double nut.

(3) And (4) planting ribs on the middle cross beam to prevent the No. 40I-steel vertical to the middle cross beam from toppling over when the middle cross beam is hoisted and moves 5.2m of I-steel.

(4) The distance between the rest point on the middle cross beam and the pull rod bolt is 3.0m, the distance cannot be randomly reduced, otherwise, the stress of the pull rod bolt is greatly increased.

(5) 4 lifting ring steel bars need to be embedded in advance when the middle cross beam is prefabricated on the bank, the lifting ring steel bars are symmetrically distributed on the diagonal line of the member, the embedding depth of the lifting rings is not less than 35d, the lifting rings are firmly welded with the structural main steel bars, and the exposed concrete surface of each steel bar is not less than 20cm.

(6) And 8 phi 50mm mounting holes are reserved when the middle cross beam is prefabricated, the mounting holes are positioned at the inward 25cm of the flange plate of the T beam along the axial direction of the bridge, the first row at the transverse axial position of the bridge is positioned at the inward 50cm of the end part of the T beam, and the second row at the inward 70cm of the end part of the T beam.

(7) The installation sequence is carried out according to the principle that the longitudinal bridge direction is symmetrical at two ends.

(8) Before the middle cross beam is installed, the installation of the tie beam is finished, the suspension rod is tensioned in place, the elevation of the tie beam is well adjusted, and the process is carried out under the condition that the concrete pouring of the wet joint of the tie beam is finished and the tensioning is finished.

The present invention will be described in further detail with reference to the drawings.

FIG. 1 is a schematic front elevational view of the center sill of the present invention installed in place. Bracket devices are arranged at two ends of the middle cross beam (2), and a No. 40I-shaped steel (7), a double-spliced No. 16 channel steel (12), a pull rod bolt (11) and the like are arranged at the top of the middle cross beam (2). The mounting position of the 40I-shaped steel (7) cannot influence the positioning of the middle cross beam, namely, the middle cross beam cannot extend too far. And (3) planting ribs (16) on the middle cross beam (2) to prevent the No. 40I-steel (15) vertical to the middle cross beam (2) from toppling over when the middle cross beam (2) is hoisted and the 5.2m I-steel (7) moves. The distance between the rear resting point on the middle cross beam (2) and the pull rod bolt (11) is 3.0m, the distance cannot be randomly reduced, otherwise, the stress of the pull rod bolt (11) is greatly increased. 4 hanging ring steel bars (10) need to be embedded in advance when the middle cross beam is prefabricated on the bank, the hanging rings are symmetrically distributed on the diagonal line of the member, the embedding depth of the hanging rings (10) is not less than 35d, the hanging rings are firmly welded with the main bar of the structure (2), and the concrete surface to be exposed out of the steel bars (10) is not less than 20cm. (1) The steel bar reinforced concrete tie beam is a reinforced concrete tie beam, (6) the arch bridge suspender, (3) the suspender (6) on the tie beam (1) is a pre-embedded steel pipe, and (4) the skid placing point for adjusting the elevation of the middle cross beam (2) is used for adjusting the elevation of the middle cross beam to meet the design requirement. (14) Is a nut of the draw-bar bolt (11), and (13) is a backing plate of the draw-bar bolt (11), and the draw-bar bolt passes through a preformed hole (18) of the middle cross beam. (8) The (15) is a No. 40I-steel placed on the middle cross beam (2), and the (9) and (17) are skids for adjusting elevation to enable the I-steel (7) to be horizontal. And (5) a steel wire rope is used when the crane is used for hoisting the middle cross beam.

FIG. 2 is a schematic elevational view of the center sill of the present invention installed in place. After the middle cross beam (2) is hoisted in place by a truck crane, the I-steel (7) with the length of 5.2m is moved, the end of the I-steel (7) extends out of the position of the hoisting rod (6), then the middle cross beam (2) is dropped on a skid placing point (4) on the tie beam (1), and a thin steel plate and a thin wood plate are prepared in advance for accurately adjusting the elevation of a wood square mat and enabling the elevation of the middle cross beam to be in the butt joint position with the tie beam.

Fig. 3 is a cross-sectional view of the tie-arch bridge of the present invention resting the cross-head assembly on the tie-beam. The double-spliced 16-channel steel (12) and the double-spliced 19-channel steel are welded at the upper side and the lower side by the splice plates (20), so that 2 pieces of 16-channel steel (12) and 2 pieces of 16-channel steel (19) are connected into a whole. A finish-rolled deformed steel bar stay bolt (11) with the diameter of 32mm is fixed by a backing plate (13) and a double nut (14). 8 installation holes (18) with the diameter of 50mm are reserved during prefabrication of the middle cross beam, the installation holes are located 25cm inward of a flange plate of the T-shaped beam along the axial position of the bridge, the first row of the installation holes is located 50cm inward of the end part of the T-shaped beam along the axial position of the transverse bridge, and the second row of the installation holes is located 70cm inward of the end part of the T-shaped beam. Bracket devices are arranged at two ends of the middle cross beam (2), and 40 # I-steel (7), double-spliced 16 # channel steel (12) and (19), a pull rod bolt (11) and the like are installed at the end part of the middle cross beam (2). (6) The arch bridge is provided with a suspender of the arch bridge, (3) the suspender (6) on the tie beam is embedded with a steel pipe, and (17) the ledger laying point for adjusting the elevation of the middle cross beam (2) is used for adjusting the elevation of the middle cross beam to meet the design requirement. (7) And (15) is a No. 40I-steel placed on the middle cross beam (2).

Claims

1. A tie rod arch bridge shelves middle cross beam device on tie beam which characterized in that:

the middle cross beam head end skid laying point consists of 1 No. 40I-steel, a skid and a middle cross beam planting bar, and the rear skid laying point consists of 4 No. 40I-steel and a skid;

the model of the 2 pieces of movable I-steel is 40, and the length is 5.2m;

the pull rod bolt penetrates through 8 reserved mounting holes with the diameter of 50mm of the middle cross beam, double-spliced 16-number channel steel is used at two ends of the pull rod bolt with the diameter of 32mm, and a base plate and double nuts are fixed;

4 lifting ring reinforcing steel bars are embedded in the middle cross beam and symmetrically distributed on the diagonal of the component.

2. The tied arch bridge resting mid-span rail apparatus on a tie beam according to claim 1, wherein:

the head-end skid laying point is composed of 1 No. 40I-steel, a skid and a middle cross beam embedded bar, the rear skid laying point is composed of 4 No. 40I-steel and a skid, and the distance from the tie bolt is 3.0m.

3. The tied arch bridge of claim 1, resting the cross-member apparatus on the tie beam, wherein:

the tie rod bolt adopts finish rolling deformed steel bar with the diameter of 32mm, 8 mounting holes with the diameter of 50mm are reserved after penetrating through the middle cross beam, the reserved mounting holes are divided into two groups, each group comprises 4 mounting holes, the positions of the mounting holes are positioned at the inward 25cm of a T-beam flange plate along the axial direction of a bridge, the first row of the mounting holes is positioned at the inward 50cm of the end part of the T-beam along the axial direction of the bridge, the second row of the mounting holes is positioned at the inward 70cm of the end part of the T-beam,

the upper side and the lower side of the double-spliced 16-channel steel are welded by splicing plates, so that 2 pieces of 16-channel steel are connected into a whole.

4. The tied arch bridge of claim 1, resting the cross-member apparatus on the tie beam, wherein:

4 rings reinforcing bars pre-buried in the middle cross beam, the symmetric distribution is on the component diagonal and welds firmly with the main muscle of structure.