CN221297594U - Crossbeam support bearing truss sheet device with active cross braces - Google Patents

Abstract

The utility model discloses a beam support bearing truss sheet device which is also used as an active transverse strut, wherein the truss sheet device is arranged to not only play a role in cable tower pushing but also serve as a device of the beam support to reduce overhead operation time, reduce the consumption of temporary engineering materials of the support and improve the utilization rate of the support; the upper cross beam and the lower cross beam share a set of support, the support bearing structure is composed of 2 trusses, meanwhile, the main steel pipe of the lower chord of the support is used as a first active transverse strut of the cable tower, one end of the truss sheet is welded and fixed to form a fixed end, and the other side of the truss sheet is limited and supported and fixed to form a limiting end. The arrangement position of the active cross brace is used for comprehensively considering the active cross brace and the cross beam support, and the truss sheet device is arranged to not only play roles in cable tower pushing but also serve as a device of the cross beam support, so that the overhead working time is shortened, the consumption of temporary engineering materials of the support is reduced, and the utilization rate of the support is improved.

Description

Crossbeam support bearing truss sheet device with active cross braces

Technical Field

The utility model relates to the technical field of bridge engineering, in particular to a beam support bearing truss sheet device which is also used as an active transverse strut.

Background

The Sichuan Kaharo Jinsha river bridge is a suspension bridge with a main span of 1030 meters, a cable tower is provided with an upper cross beam and a lower cross beam, 5 active cross beams are arranged in the construction process of the Yunnan shore cable tower and are divided into a cross beam support section and a general section active cross beam, wherein the first channel and the fifth channel are cross beam support sections, and the second channel, the third channel and the fourth channel are general active cross beams, and are arranged as shown in the figure. Fig. 1 is an active cross-brace layout.

The construction of the cable tower beam is usually performed by adopting a floor type large steel pipe bracket or a K-shaped bracket. The construction method of the active transverse bracing of the cable tower adopts 2 large steel pipes as transverse stress members, wherein the steel pipes are fixed at one end of the cable tower, and the other end of the steel pipes are pushed by a hydraulic jack to achieve the effect of the active transverse bracing.

The construction of the active cross brace and the cross beam bracket of the cable tower has long overhead operation time; the up-down cross operation is more; the welding amount of the bracket erection section bar is large, the welding quality requirement is high, the installation precision is high, and the like; the support is dismantled and is limited space, hoisting equipment lifting capacity etc. and demolishd the degree of difficulty greatly.

Disclosure of utility model

In order to solve the above-described drawbacks, the present utility model provides a beam bracket load-bearing truss sheet device that also serves as an active spreader. The arrangement position of the active cross brace is used for comprehensively considering the active cross brace and the cross beam support, and the truss sheet device is arranged to not only play roles in cable tower pushing but also serve as a device of the cross beam support, so that the overhead working time is shortened, the consumption of temporary engineering materials of the support is reduced, and the utilization rate of the support is improved.

The utility model is realized in such a way that a beam support bearing truss sheet device which is also used as an active transverse strut is constructed, and the utility model is characterized in that; the truss sheet device is arranged, so that the device which can not only play a role in cable tower pushing but also serve as a cross beam bracket can reduce the overhead operation time, reduce the temporary engineering material consumption of the bracket and improve the utilization rate of the bracket;

The upper cross beam and the lower cross beam share a set of support, the support bearing structure is composed of 2 trusses, meanwhile, the main steel pipe of the lower chord of the support is used as a first active transverse strut of the cable tower, one end of the truss sheet is welded and fixed to form a fixed end, and the other side of the truss sheet is limited and supported and fixed to form a limiting end.

The utility model relates to a beam support bearing truss sheet device which is also used as an active transverse strut, which is characterized in that; the truss sheet structure is formed by welding phi 820 x 12 horizontal steel pipes, phi 630 x 8 upper and lower connecting pipes and 2H-shaped steel 45, and channel steel beams are welded between the H-shaped steel.

The utility model relates to a beam support bearing truss sheet device which is also used as an active transverse strut, which is characterized in that; in the truss sheet, an opening is formed in one end of the top surface of a steel pipe, a jack can be placed in the width and the length of the opening, a steel plate with the thickness of 20mm and the length of 30cm is made into a cross frame to be welded in the steel pipe, and then the steel plate with the thickness of 20mm and the thickness of 25cm is welded on the cross frame to be welded on the cross frame to serve as a jack limiting device.

The utility model has the following advantages: the present utility model provides a beam support load-bearing truss sheet apparatus that doubles as an active spreader. The arrangement position of the active cross brace is used for comprehensively considering the active cross brace and the cross beam support, and the truss sheet device is arranged to not only play roles in cable tower pushing but also serve as a device of the cross beam support, so that the overhead working time is shortened, the consumption of temporary engineering materials of the support is reduced, and the utilization rate of the support is improved.

Drawings

FIG. 1 is a prior art active cross brace arrangement;

FIG. 2 is a truss sheet skeleton effect diagram;

FIG. 3 is a construction view of a single truss sheet;

fig. 4 is a schematic view of a hydraulic jack arrangement.

Wherein: the device comprises a fixed end 1, a limiting end 2, phi 820 x 12 horizontal steel pipes 3, phi 630 x 8 upper and lower connecting pipes 4,2 h 45I-steel 5 and a channel beam 6.

Detailed Description

The following detailed description of the present utility model will provide clear and complete description of the technical solutions of embodiments of the present utility model, with reference to fig. 1-4, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model provides the beam support bearing truss sheet device which is also used as the active cross brace through improvement, the active cross brace and the beam support are comprehensively considered through the arrangement position of the active cross brace, and the truss sheet device can not only play roles in cable tower pushing but also serve as the beam support device to reduce the overhead working time, reduce the consumption of temporary engineering materials of the support and improve the utilization rate of the support.

When the hydraulic jack is implemented, the working procedures, the construction period and the support structure are reasonably arranged according to the structural characteristics of the cable tower, the upper cross beam and the lower cross beam share a set of support, the support bearing structure consists of 2 trusses, meanwhile, the main steel pipe of the lower chord of the support is used as a first active cross beam of the cable tower, one end of the truss sheet is welded and fixed during installation, the other side of the truss sheet is limited and supported and fixed, and after the active cross beam applies active thrust, the hydraulic jack is removed and the limiting support end is welded on the embedded steel plate. The lower beam construction is completed, the support is removed and used as an upper beam construction support, the upper beam support construction is carried out by the same method, the main steel pipe of the lower chord of the support is used as a 5 th active cross brace, the cross beam support is combined with the active cross brace, 2 active cross brace materials are reduced, and meanwhile, the upper beam support materials are saved.

Figure 2 truss sheet skeleton effect diagram

The truss sheet structure is described below, the active cross brace of the cross beam section is combined with the cross beam support, the cross beam support is also used as the active cross brace, the steel skeleton is formed by welding phi 820 x 12 horizontal steel pipes, phi 630 x 8 upper and lower connecting pipes, 2H-shaped steel 45I-shaped steel on the ground to form skeleton sheets, and the weight of the single skeleton is about 20t. Phi 630 x 8 steel pipes and horizontal steel pipes are cut by adopting a project processing plant special equipment intersecting line cutting machine. The welding quality of intersecting lines can be guaranteed when the framework plates are welded on the ground, and welding seam detection is completed when welding is completed. Figure 3 is a diagram of a monolithic truss sheet configuration.

The position structure of the active cross brace jack; and an opening is formed in one end of the top surface of the steel pipe, a jack can be placed in the width and the length of the opening, a steel plate with the thickness of 20mm and the length of 30cm is made into a cross frame to be welded in the steel pipe, and then the steel plate with the thickness of 25cm and the thickness of 20mm is welded on the cross frame to be welded on the cross frame to serve as a jack limiting device. Fig. 4 hydraulic jack arrangement.

The following describes a construction process according to the present application;

① Truss sheet processing: the beam section skeleton processing is processed in the open space in front of the cable tower, skeleton position lines are placed on the ground during processing, then vertical rods and inclined rods are connected, intersecting lines of the vertical rods and the inclined rods phi 630 x 8 and the horizontal steel pipes phi 820 x 12 are processed in a processing plant, then the ground is welded firmly on site, and a pushing device is arranged at an opening at one end of each steel pipe. And welding the steel pipes with the length of 50cm in the transverse connection phi 325 x 8, and performing transverse connection after the installation of the main framework is completed. Each parallel connection position is provided with a platform and a channel, the channel is welded on a column steel pipe by adopting angle steel, a channel is arranged on I-steel I45, a channel column is welded on I-steel I45 by adopting angle steel spacing of 3m L75 x 6, and 2 layers of phi 20 steel bars are arranged on the angle steel and welded on the column steel as channel horizontal rods.

② And (3) truss sheet installation: the framework is hoisted by adopting a D1500 tower crane in a slicing way, 2 phi 28 steel wire ropes are adopted as hoisting steel ropes, the length of each steel rope is 16m, and lifting lugs are welded on I-steel of a work 45 by adopting a steel plate with the thickness of 3 cm. And the section steel framework is hoisted and placed on the bracket, the framework is limited by using a code plate after the position is adjusted, the connection points of the steel pipe at one end, the I-steel and the beam embedded plate are welded, the stiffening plate at the welding connection position is loosened from the hoisting point, and the next framework is hoisted.

③ And (3) transverse connection construction: and 2, hoisting the frameworks in place, and then connecting the transverse connecting rod pieces from bottom to top.

④ The lower chord steel pipe of the truss sheet beam bracket realizes active supporting and jacking.

One end of the active transverse support is welded and fixed on the embedded plate, the other end of the active transverse support is limited on the embedded plate, and the steel pipe can slide along with the limiting plate to achieve the pushing effect.

The beneficial effects obtained by the application are as follows: (1) The beam bracket is processed, installed and molded for 10 days, and the efficiency is improved by 2 times compared with the beam bracket of the same type. (2) saving about 40 tons of individual active cross-bracing profiles. (3) Greatly reduces the high-altitude welding operation time and reduces the safety risk. (4) The truss sheet beam support is integrally assembled and disassembled, the cable tower is actively supported and taken into the beam support system, the upper beam support and the lower beam support are universal, the ground integral forming is realized, and the cable tower is rapidly assembled and disassembled in high altitude.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (3)

1. A beam support bearing truss sheet device which is also used as an active transverse strut, which is characterized in that;

the structure of the cable tower is composed of 2 trusses, meanwhile, the lower chord main steel pipe of the bracket is used as a first active transverse strut of the cable tower, one end of the truss sheet is welded and fixed to form a fixed end (1) when being installed, and the other side of the truss sheet is limited and supported and fixed to form a limiting end (2).

2. A beam support load-bearing truss sheet apparatus for use as an active spreader as defined in claim 1, wherein; the truss sheet structure is formed by welding phi 820 x 12 horizontal steel pipes (3), phi 630 x 8 upper and lower connecting pipes (4) and 2H-shaped steel 45 (5), and channel steel beams (6) are welded between the H-shaped steel.

3. A beam support load-bearing truss sheet apparatus for use as an active spreader as defined in claim 1, wherein; in the truss sheet, an opening is formed in one end of the top surface of a steel pipe, a jack can be placed in the width and the length of the opening, a steel plate with the thickness of 20mm and the length of 30cm is made into a cross frame to be welded in the steel pipe, and then the steel plate with the thickness of 20mm and the thickness of 25cm is welded on the cross frame to be welded on the cross frame to serve as a jack limiting device.