A tie-rod arch type quick-assembly support and its erection method

Abstract

The present invention provides a tie-rod arch quick-assembly support and a method for erecting the same. The support comprises two tie-rod arches arranged between two bridge piers, each tie-rod arch comprises an arch rib, tie rods are connected between arch feet at both ends of the arch rib, arch feet at both ends of the arch rib are respectively supported on corbels preset on the pier body, and a flat connecting rod is connected between the two arch ribs; a plurality of vertical poles are welded on each arch rib, the upper ends of the vertical poles are at the same height as the arch top of the arch rib, and a load-bearing beam is arranged along the top of the vertical poles and the arch top on each arch rib. The present invention adopts the tie-rod arch as the main force-bearing structure of the support, makes full use of the constructed bridge pier structure, avoids the treatment of the foundation of bad geology, and has the advantages of light structure, material saving, low cost, and convenient installation and disassembly under the same load.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge construction, relates to a bracket erected when installing a bridge superstructure, and specifically relates to a tie-rod arch type quick-assembly bracket and an erection method thereof. Background Art

[0002] The sliding installation or cast-in-place construction of bridge box girders requires the erection of supports. Currently, the common bridge construction sliding supports or cast-in-place beam supports mainly include ground-mounted large-diameter steel pipe supports, full-height scaffolding and truss-type mobile formwork.

[0003] The overall steel consumption of the ground-mounted large-diameter steel pipe support is large, and the erection and dismantling is time-consuming and labor-intensive. When the foundation of the bridge site is poor, foundation treatment is required, which has poor economic efficiency.

[0004] The installation of full-height scaffolding is complicated and requires high installation quality. When the foundation of the bridge is poor, foundation treatment is also required. And major accidents such as support collapse are mostly caused by full-height scaffolding.

[0005] The truss-type mobile formwork can be attached to the pier body by means of pins or triangular brackets, which reduces the workload of foundation treatment. However, the structural weight of the mobile formwork increases sharply with the increase of the span of the bridge. When a certain span is reached, the mobile formwork structure is too heavy, the amount of steel used is large, and the economic efficiency is significantly reduced. Summary of the invention

[0006] The purpose of the present invention is to develop a tie-arch type load-bearing support and an erection method thereof which has a lighter structure, better economy and is easier to construct, in view of the drawbacks of existing sliding supports or cast-in-place beam supports for bridge construction.

[0007] The invention provides a tie-arch quick-assembly bracket, which is characterized in that it comprises two tie-arches arranged between two bridge piers, each tie-arch comprises an arch rib, tie-rods are connected between arch feet at both ends of the arch rib, arch feet at both ends of the arch rib are respectively supported on lower corbels preset on the pier body, and a flat connecting rod is connected between the two arch ribs; a plurality of vertical poles are welded to each arch rib, the upper ends of the vertical poles are at the same height as the arch top of the arch rib, and a load-bearing beam is arranged along the top of the vertical pole and the arch top on each arch rib.

[0008] The present invention provides a method for erecting a tie-rod arch quick-assembly support, which is characterized by comprising the following steps:

[0009] (1) During the concrete pouring construction of the bridge piers, according to the predetermined support position, the bracket connectors are embedded on the two opposite sides of the two piers along the bridge direction, or on the two sides of each pier transverse to the bridge direction; before the bracket is erected, the lower bracket or the upper bracket is installed on the bracket embedded parts, and a discharge device is installed on each bracket, and the discharge device adopts a discharge sand barrel or a discharge steel wedge;

[0010] (2) Erect a tied arch support between two piers:

[0011] (21) When the corbels are located on opposite sides of the two piers along the bridge direction, two tie arches are installed between the opposite sides of the two piers. The arch feet at both ends of each tie arch are supported on the lower corbels on the two piers respectively, and a parallel connecting rod is provided between the arch ribs of the two tie arches.

[0012] A plurality of vertical poles for supporting the arch ribs are pre-processed, and the length of each vertical pole is determined according to the height from the elevation of the position where it is scheduled to support the arch rib to the height of the arch crown; the upper end of each vertical pole is pre-welded to the bottom surface of the load-bearing beam, and connecting rods are welded between the vertical poles connected to the bottom of each load-bearing beam and between the vertical poles connected to the bottom of two load-bearing beams to form a truss structure, and the truss is hoisted as a whole above the two arch ribs, and each load-bearing beam is supported on the arch crown of the arch rib and the upper corbel on the pier, and the lower end of each vertical pole is welded to the arch rib, and the tie arch bracket is erected;

[0013] (22) When the corbels are located on both sides of each pier in the transverse direction, a tie arch is installed on both sides of the two piers. A plurality of vertical rods are pre-welded on each tie arch. The upper end of each vertical rod is at the same height as the arch top of the arch rib of the tie arch. The tie arch and the vertical rods are hoisted as a whole. The arch feet at both ends of each tie arch are supported on the lower corbels on the two piers respectively. A parallel connecting rod is arranged between the arch ribs of the two tie arches.

[0014] A load-bearing beam is set along the top of the vertical rod on each arch rib and the arch crown, and multiple distribution beams are set in the transverse direction on the two load-bearing beams. The erection of the tied arch support is completed.

[0015] The present invention adopts a tie arch as the main force-bearing structure of the bracket. The tie arch is a structural form that combines the advantages of an arch and a rod. It combines the two basic structural forms of an arch and a rod to bear the load together, giving full play to the structural performance and combined effect of the arch being compressed and the tie rod being tensile. The horizontal thrust of the arch end is borne by the tie rod, so that the arch end support does not generate horizontal thrust. It has the outstanding advantages of light structure, reasonable force, economical material use, and convenient installation and disassembly under the same load. It can make full use of the constructed pier structure, avoid the foundation treatment of poor geology, greatly reduce the investment in temporary steel structure materials for bridge construction, and has significant economic advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of a tie-rod arch type quick-assembled bracket;

[0017] Figure 2 It is a structural schematic diagram of another embodiment of a tie-rod arch type quick-assembled bracket;

[0018] Figure 3 yes Figure 1Schematic diagram of the tie rod arch and the flat joint installation state of the embodiment shown;

[0019] Figure 4 yes Figure 1 A schematic diagram of the installation state of the upright poles and the load-bearing beams of the illustrated embodiment;

[0020] Figure 5 yes Figure 2 A schematic diagram of the installation state of the tie steel arch and the upright pole of the embodiment shown;

[0021] Figure 6 yes Figure 2 Schematic diagram of the installation state of the parallel connecting rod of the embodiment shown. DETAILED DESCRIPTION

[0022] like Figure 1 , Figure 2 As shown, a tie-arch quick-assembly support provided by the present invention comprises two tie-arches arranged between two piers 1, each tie-arch comprises an arch rib 2, tie rods 3 are connected between arch feet at both ends of the arch rib, arch feet at both ends of the arch rib are respectively supported on lower corbels 4 preset on the pier body, and a horizontal connecting rod 5 is connected between the two arch ribs; a plurality of vertical rods 6 are welded to each arch rib, the upper ends of the vertical rods are at the same height as the arch top of the arch rib, and a load-bearing beam 7 is arranged along the top of the vertical rods and the arch top on each arch rib.

[0023] exist Figure 1 In the illustrated embodiment, two series of steel arches are supported on opposite side walls of two piers along the bridge direction. Upper corbels 8 are also preset on the two opposite side walls of the piers, and both ends of the load-bearing beam 7 are supported on the two upper corbels 8 respectively.

[0024] exist Figure 2 In the embodiment shown, two tie arches are respectively installed on the side walls of two piers in the transverse direction of the bridge, and a distribution beam 9 is arranged on the load-bearing beam.

[0025] In order to facilitate height adjustment during bracket installation and bracket disassembly after construction is completed, unloading devices are respectively installed on the lower bracket and the upper bracket. The unloading devices can be unloading sand barrels or unloading steel wedges.

[0026] In order to prevent the load-bearing beam from being displaced, a load-bearing beam positioning slot can be provided at the arch top of each arch rib. Both sides of the load-bearing beam are confined in the positioning slot.

[0027] The erection method of the above-mentioned tie-rod arch quick-assembled support is as follows:

[0028] (1) During the concrete pouring construction of the bridge pier 1, according to the predetermined support position, the bracket connectors are respectively embedded on the two opposite sides of the two piers along the bridge direction, or on the two sides of each pier transverse to the bridge direction; before the bracket is erected, the lower bracket 4 or the upper bracket 8 is installed on the bracket embedded parts, and a discharge device is installed on each bracket, and the discharge device adopts a discharge sand barrel or a discharge steel wedge;

[0029] (2) Erect a tied arch support between two piers:

[0030] (21) Figure 3 As shown, when the corbels are located on opposite sides of the two piers along the bridge direction, two tie arches are installed between the opposite sides of the two piers, and the arch feet at both ends of the arch rib 2 of each tie arch are respectively supported on the lower corbels 4 on the two piers, and a parallel connecting rod 5 is arranged between the arch ribs of the two tie arches;

[0031] like Figure 4 As shown, a plurality of vertical poles 6 for supporting the arch ribs are pre-processed, and the length of each vertical pole is determined according to the elevation of the position where it is scheduled to support the arch rib to the height of the arch crown; the upper end of each vertical pole 6 is pre-welded to the bottom surface of the load-bearing beam 7, and connecting rods 10 are welded between the vertical poles connected to the bottom of each load-bearing beam and between the vertical poles connected to the bottom of two load-bearing beams to form a truss structure, and the truss is hoisted as a whole above the two arch ribs, and each load-bearing beam 7 is supported on the arch crown of the arch rib and the upper corbel 8 on the pier, and the lower end of each vertical pole is welded to the arch rib, and the bracket is erected. The erected tie arch bracket is shown in FIG. Figure 1 shown.

[0032] (22) Figure 5 , Figure 6 As shown, in the case where the corbels are located on both sides of each pier in the transverse direction of the bridge, a tie arch is installed on both sides of the two piers respectively, and a plurality of vertical rods 6 are pre-welded on the arch rib 2 of each tie arch, and the upper end of each vertical rod is at the same height as the arch top of the arch rib of the tie arch. The tie arch and the vertical rods are hoisted as a whole, and the arch feet at both ends of the arch rib 2 of each tie arch are supported on the lower corbels 4 on the two piers respectively, and a horizontal connecting rod 5 is arranged between the arch ribs of the two tie arches;

[0033] A load-bearing beam 7 is set up along the top of the vertical rod on each arch rib and the arch top, and multiple distribution beams 9 are set up in the transverse direction on the two load-bearing beams. The bracket is set up. Figure 2 shown.

Claims

1. A tie-rod arch quick-assembled bracket, characterized in that: It comprises two tie arches arranged between two piers, each tie arch comprises an arch rib, tie rods are connected between arch feet at both ends of the arch rib, arch feet at both ends of the arch rib are respectively supported on lower corbels preset on the pier body, and a parallel connecting rod is connected between the two arch ribs; a plurality of vertical poles are welded on each arch rib, the upper ends of the vertical poles are at the same height as the arch crown of the arch rib, and a load-bearing beam is arranged along the top of the vertical pole and the arch crown on each arch rib; the two tie arches are supported on the two side walls of the two piers along the bridge direction, upper corbels are further arranged on the opposite side walls of the two piers, the two ends of the load-bearing beam are respectively supported on the upper corbels on the two piers, the lower corbels are preset on the two side walls of each pier in the transverse direction of the bridge, and a distribution beam is erected on the load-bearing beam.

2. A method for erecting a tie-rod arch quick-assembled support, characterized in that: The following steps are involved: (1) During the concrete pouring construction of the bridge piers, according to the predetermined support position, the bracket connectors are embedded on the two opposite sides of the two piers along the bridge direction, or on the two sides of each pier transverse to the bridge direction; before the bracket is erected, the lower bracket or the upper bracket is installed on the bracket embedded parts, and a discharge device is installed on each bracket, and the discharge device adopts a discharge sand barrel or a discharge steel wedge; (2) Erect a tied arch support between two piers: (21) When the corbels are located on opposite sides of the two piers along the bridge direction, two tie arches are installed between the opposite sides of the two piers. The arch feet at both ends of each tie arch are supported on the lower corbels on the two piers respectively, and a parallel connecting rod is provided between the arch ribs of the two tie arches. A plurality of vertical poles for supporting the arch ribs are pre-processed, and the length of each vertical pole is determined according to the height from the elevation of the position where it is scheduled to support the arch rib to the height of the arch crown; the upper end of each vertical pole is pre-welded to the bottom surface of the load-bearing beam, and connecting rods are welded between the vertical poles connected to the bottom of each load-bearing beam and between the vertical poles connected to the bottom of two load-bearing beams to form a truss structure, and the truss is hoisted as a whole above the two arch ribs, and each load-bearing beam is supported on the arch crown of the arch rib and the upper corbel on the pier, and the lower end of each vertical pole is welded to the arch rib, and the tie arch bracket is erected; (22) When the corbels are located on both sides of each pier in the transverse direction, a tie arch is installed on both sides of the two piers. A plurality of vertical rods are pre-welded on each tie arch. The upper end of each vertical rod is at the same height as the arch top of the arch rib of the tie arch. The tie arch and the vertical rods are hoisted as a whole. The arch feet at both ends of each tie arch are supported on the lower corbels on the two piers respectively. A parallel connecting rod is arranged between the arch ribs of the two tie arches. A load-bearing beam is set along the top of the vertical rod on each arch rib and the arch crown, and multiple distribution beams are set in the transverse direction on the two load-bearing beams. The erection of the tied arch support is completed.

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