CN209923771U

CN209923771U - Dumbbell shaped steel pipe encircles mounting structure

Info

Publication number: CN209923771U
Application number: CN201920216698.9U
Authority: CN
Inventors: 万应强; 魏斌; 王思文; 王明强; 杨贺; 刘新乐
Original assignee: CCCC Tunnel Engineering Co Ltd
Current assignee: CCCC Tunnel Engineering Co Ltd
Priority date: 2019-02-20
Filing date: 2019-02-20
Publication date: 2020-01-10
Anticipated expiration: 2029-02-20

Abstract

The utility model discloses a dumbbell type steel pipe arch mounting structure, including the support stand, support stand top is equipped with distribution roof beam and conduit saddle, the top of distribution roof beam is located to the conduit saddle, the top of conduit saddle is equipped with the lower chord tube, the top of lower chord tube is equipped with the upper chord tube, be equipped with the arch rib between upper chord tube and the lower chord tube, weld into the triangular supports frame on support stand and the I-steel, the bottom welded fastening of lower chord tube is equipped with a wedge steel bloom, the wedge steel bloom links to each other with the top of jack, the bottom of jack links to each other with the triangular supports frame, conduit saddle circular arc radius and arch rib radius are unanimous, it has the steel backing plate still to prop up between distribution roof beam and the conduit saddle. Compared with the prior art, the scheme has the advantages of simple and efficient operation, accurate positioning and low safety risk; the adjusting equipment is common equipment and materials, and special processing is not needed; the process is flexible, and even if the mounted subsequent arch rib disturbs the mounted arch rib to generate displacement, the replacement can be retested and adjusted after all the arch ribs are mounted.

Description

Dumbbell shaped steel pipe encircles mounting structure

Technical Field

The utility model relates to a bridge construction technical field is a dumbbell shaped steel pipe arch mounting structure particularly.

Background

With the rapid development and construction of the bridge industry of China, some special bridges are increasingly applied to the construction of high-speed railways and urban bridges. The steel pipe concrete arch bridge is one of special bridges. The steel tube concrete arch bridge is mostly applied to the construction above canyons and rivers. At present, in the installation process of the steel pipe arch rib, a relatively universal steel pipe arch installation structure is not formed in the industry in a summary mode, the steel pipe arch rib can be rapidly limited in the hoisting process of the steel pipe arch rib, and meanwhile it is guaranteed that the hoisted arch rib does not have subsequent deviation, so that the purposes of meeting the linear requirement and achieving rapid construction through technical skill guarantee are achieved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects in the prior art and providing a dumbbell type steel pipe arch mounting structure for solving the problems.

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

the utility model provides a dumbbell type steel pipe arch mounting structure, includes support stand, its characterized in that: the top of the support stand column is provided with a distribution beam and a pipe support, the pipe support is arranged above the distribution beam, a lower chord pipe is arranged above the pipe support, an upper chord pipe is arranged above the lower chord pipe, an arch rib is arranged between the upper chord pipe and the lower chord pipe, the support stand column and the I-shaped steel are welded into a triangular support frame, the bottom end of the lower chord pipe is fixedly welded with a wedge-shaped steel block, the wedge-shaped steel block is connected with the top end of the jack, and the bottom end of the jack is connected with the triangular support frame.

Preferably, the arc radius of the pipe bracket is consistent with the radius of the arch rib.

Preferably, a steel backing plate is supported between the distribution beam and the pipe bracket.

The utility model discloses a dumbbell type steel pipe arch mounting structure, including the support stand, support stand top be equipped with distribution roof beam and conduit saddle, the top of distribution roof beam is located to the conduit saddle, the top of conduit saddle is equipped with down the chord tube, the top of down the chord tube is equipped with the chord tube, be equipped with the arch rib between chord tube and the down chord tube, weld into the triangular supports frame on support stand and the I-steel, the bottom welded fastening of down the chord tube is equipped with a wedge steel bloom, the wedge steel bloom links to each other with the top of jack, the bottom of jack links to each other with the triangular supports frame. Compared with the prior art, the scheme has the advantages of simple and efficient operation, accurate positioning and low safety risk; the adjusting equipment is common equipment and materials, and special processing is not needed; the process is flexible, and even if the mounted subsequent arch rib disturbs the mounted arch rib to generate displacement, the replacement can be retested and adjusted after all the arch ribs are mounted.

Drawings

Fig. 1 is a schematic structural diagram of the dumbbell-shaped steel pipe arch mounting structure of the present invention.

The steel structure comprises 1-support upright columns, 2-distribution beams, 3-pipe brackets, 4-lower chord pipes, 5-upper chord pipes, 6-arch ribs, 7-triangular support frames, 8-jacks, 9-steel base plates and 10-wedge-shaped steel blocks.

Detailed Description

In order to further understand and appreciate the structural features and advantages of the present invention, preferred embodiments and the accompanying drawings are described in detail as follows:

referring to the attached figure 1, the dumbbell-shaped steel pipe arch mounting structure comprises a support upright, wherein a distribution beam and a pipe support are arranged at the top of the support upright, the pipe support is arranged above the distribution beam, a lower chord pipe is arranged above the pipe support, an upper chord pipe is arranged above the lower chord pipe, arch ribs are arranged between the upper chord pipe and the lower chord pipe, the support upright and an I-shaped steel are welded to form a triangular support frame, the I-shaped steel is I16, a wedge-shaped steel block is fixedly welded at the bottom end of the lower chord pipe and is connected with the top end of a jack, the bottom end of the jack is connected with the triangular support frame, the arc radius of the pipe support is consistent with the radius of the arch ribs, the center line of the arch ribs is popped out at the top of the support before the placement, the center position is marked on the pipe support, then the steel pipe arch ribs are placed on the pipe support by using a crane, after the placement is stable, the top surface of the arch ribs is adjusted, and finally, welding and fixing a wedge-shaped steel block on the upper chord pipe of the arch rib, temporarily welding and fixing the wedge-shaped steel block with the jacking end of the jack, temporarily welding and fixing the base end of the jack with the triangular support frame, and adjusting the plane position of the upper chord pipe of the arch rib through the jack.

One embodiment of this scheme is as follows: the invention depends on the commercial Hangzhou high-speed rail project Taihe and the extra-large bridge span sand Yinghe (88+168+88) m continuous rigid frame arch bridge which is a tied arch bridge, combines two basic structural forms of an arch and a beam together to bear load together, and fully exerts the structural performance and the combination effect of bending and pressing the beam.

The arch ribs of the continuous rigid frame arch adopt vertical parallel arches, the center distance between the two arch ribs is 14.8m, the calculation span is 168m, the vertical height of the arch rib is 33.6m, and a quadratic parabola form is adopted.

At the arch top, the cross section of each arch rib adopts a dumbbell type steel pipe concrete uniform section, the height of the cross section is 3.3m, the diameter of the steel pipe is 1.1m, the steel pipe is formed by rolling a steel plate with the thickness of 20mm, and two steel pipes of each arch rib are connected by a web plate with the thickness of 16 mm. And stiffening hoops are arranged in the round steel pipes at intervals, and pulling plates are welded in the two web plates. C55 self-compacting compensation shrinkage concrete is poured into the arch tube and the abdominal cavity.

And cross braces and inclined braces are arranged between the arch ribs. The cross brace is a round end section, is 1.5m high, 1.2m wide and 1.2m in outer diameter of the round end, and is formed by rolling a 12mm steel plate; the inclined strut is composed of circular steel pipes with the outer diameter of 0.8m, and concrete is not filled in the steel pipes.

The total weight of the steel pipe arch steel structure is about 661.5t, the steel pipe arch steel structure is divided into 26 sections of arch ribs, 9 sections of cross braces and other accessories, the longest section of the arch ribs is 15.634m, the weight is about 27t, the cross braces are not divided, the length of each section of the cross brace is 13.7m, and the weight is about 6.0 t.

The construction adopts a beam-first arch-second method, firstly, the continuous beam is cast by a cantilever, and then the steel arch is assembled on the beam by an in-situ support method.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a dumbbell type steel pipe arch mounting structure, includes support stand (1), its characterized in that: support stand (1) top be equipped with distribution roof beam (2) and conduit saddle (3), conduit saddle (3) locate the top of distribution roof beam (2), the top of conduit saddle (3) be equipped with down chord pipe (4), the top of down chord pipe (4) be equipped with chord pipe (5), last chord pipe (5) and down chord pipe (4) between be equipped with arch rib (6), support stand (1) and I-steel on weld into triangular supports frame (7), the bottom welded fastening of down chord pipe (4) be equipped with a wedge steel bloom (10), the top of wedge steel bloom (10) and jack (8) link to each other, the bottom of jack (8) link to each other with triangular supports frame (7).

2. The dumbbell-shaped steel pipe arch installing structure of claim 1, wherein: the arc radius of the pipe bracket (3) is consistent with the radius of the arch rib (6).

3. The dumbbell-shaped steel pipe arch installing structure of claim 1, wherein: and a steel backing plate (9) is supported and cushioned between the distribution beam (2) and the pipe bracket (3).