阅读说明：本技术 一种双层钢箱梁桥安装方法及安装用组合支架 (Double-layer steel box girder bridge installation method and combined support for installation ) 是由 李朝阳 李未龙 雷佳园 马根弟 杨晓晓 王泽明 赵欣 林宏 于 2019-11-06 设计创作，主要内容包括：本发明属于钢结构桥梁施工技术领域,公开了一种双层钢箱梁桥安装方法及安装用组合支架；所述双层钢箱梁桥安装用组合支架包括：第一立柱组、第一横梁、第二立柱组、第二横梁以及底座板；所述第一立柱组包括：多根第一立柱,所述第一横梁固定在所述多根第一立柱上,形成下层支架；所述第二立柱组包括：多根第二立柱,所述第二横梁固定在所述多根第二立柱上,形成上层支架；所述多根第一立柱和所述多根第二立柱均固定在所述底座板上；其中,所述第一立柱的高度低于所述第二立柱的高度。本申请提供的双层钢箱梁桥安装方法及安装用组合支架能够实现双层钢箱梁桥安装的高效同步安装。(The invention belongs to the technical field of steel structure bridge construction, and discloses a method for installing a double-layer steel box girder bridge and a combined bracket for installation; the sectional shelf-unit is used in installation of double-deck steel box girder bridge includes: the device comprises a first column set, a first cross beam, a second column set, a second cross beam and a base plate; the first set of posts includes: the first cross beam is fixed on the first upright columns to form a lower layer bracket; the second set of posts includes: the second cross beam is fixed on the second upright columns to form an upper layer bracket; the first upright columns and the second upright columns are fixed on the base plate; wherein the height of the first upright is lower than the height of the second upright. The installation method of the double-layer steel box girder bridge and the combined bracket for installation can realize efficient synchronous installation of the double-layer steel box girder bridge.)

1. The utility model provides a double-deck steel box girder bridge sectional shelf-unit for installation which characterized in that includes: the device comprises a first column set, a first cross beam, a second column set, a second cross beam and a base plate;

the first set of posts includes: the first cross beam is fixed on the first upright columns to form a lower layer bracket;

the second set of posts includes: the second cross beam is fixed on the second upright columns to form an upper layer bracket;

the first upright columns and the second upright columns are fixed on the base plate;

wherein the height of the first upright is lower than the height of the second upright.

2. The sectional bracket for installing a double-deck steel box girder bridge according to claim 1, wherein the plurality of first columns are arranged vertically in parallel with the plurality of second columns, and the plurality of first columns are located inside the plurality of second columns.

3. The sectional bracket for installing a double-deck steel box girder bridge according to claim 2, wherein the first pillar is fixedly connected to the second pillar.

4. The sectional bracket for installing a double-deck steel box girder bridge according to claim 1, wherein the first pillar and the second pillar are lattice pillars.

5. The sectional bracket for installing a double-deck steel box girder bridge according to claim 1, wherein the first cross member is connected to the first columns through a first gusset plate, and the second cross member is connected to the second columns through a second gusset plate.

6. A method for installing a double-layer steel box girder bridge, which is characterized in that the combined bracket for installing the double-layer steel box girder bridge as claimed in claim 1 is adopted; and performing the following steps:

constructing the combined bracket for mounting the double-layer steel box girder bridge;

hoisting the main body structure of the lower-layer steel box girder and fixing the main body structure on the lower-layer bracket;

hoisting an upper layer steel box girder main body structure and fixing the upper layer steel box girder main body structure on the upper layer bracket;

hoisting an upper-layer steel box girder cantilever and fixing the upper-layer steel box girder cantilever on the upper-layer steel box girder main body;

welding seams of the upper layer steel box girder main body structure and the lower layer steel box girder main body structure are respectively welded;

unloading the upper steel box girder;

hoisting a lower-layer steel box girder cantilever and fixing the lower-layer steel box girder cantilever on the lower-layer steel box girder main body structure;

and unloading the main structure of the lower-layer steel box girder.

7. The double-deck steel box girder bridge installation method of claim 6, wherein: the upper steel box girder cantilever is two, and the symmetry is fixed upper steel box girder major structure both sides.

8. The double-deck steel box girder bridge installation method of claim 7, wherein: and the upper layer steel box girder cantilever is welded on the upper layer steel box girder main body structure.

9. The double-deck steel box girder bridge installation method of claim 6, wherein: the lower steel box girder cantilever is two, and the symmetry is fixed lower floor steel box girder major structure both sides.

10. The double-deck steel box girder bridge installation method of claim 6, wherein: and the lower layer steel box girder cantilever is welded on the lower layer steel box girder main body structure.

Technical Field

The invention relates to the technical field of steel structure bridge construction, in particular to a double-layer steel box girder bridge installation method and a combined support for installation.

Background

The bridge with the double-layer structure can obviously improve the urban traffic capacity and reduce the occupied land, so the bridge is widely applied to municipal high frames. Generally, the design width of a single bridge is 12-16 meters, 3-4 lanes are generally arranged, most of the single bridge is installed by a support method due to the influence of the complex environment of the municipal viaduct, and one support is constructed at each construction layer; because the bridge is horizontal span is big, needs a large amount of support materials, area is big, and the framing construction needs moreover, and is with high costs, the cycle length. Meanwhile, the construction process is complex, the period is long, the cost is high, and the labor intensity of personnel is high due to the problems that the operation space is limited, the engineering machinery cannot be input and the like; meanwhile, the mutual influence among layers is easily caused, and the bridge is damaged.

Disclosure of Invention

The invention provides a double-layer steel box girder bridge installation method and a combined support for installation, and solves the technical problems that in the prior art, the double-layer steel box girder bridge is complex in installation process, long in period, mutually influenced between layers and high in cost under a municipal complex environment.

In order to solve the technical problem, the invention provides a combined bracket for mounting a double-layer steel box girder bridge, which comprises: the device comprises a first column set, a first cross beam, a second column set, a second cross beam and a base plate;

the first set of posts includes: the first cross beam is fixed on the first upright columns to form a lower layer bracket;

the second set of posts includes: the second cross beam is fixed on the second upright columns to form an upper layer bracket;

the first upright columns and the second upright columns are fixed on the base plate;

wherein the height of the first upright is lower than the height of the second upright.

Further, many first stands with many second stand vertical parallel arrangement, just many first stands are located many second stand are inboard.

Further, the first upright post is fixedly connected with the second upright post.

Further, the first upright post and the second upright post are both lattice posts.

Furthermore, the first cross beam is connected with the first columns through first gusset plates, and the second cross beam is connected with the second columns through second gusset plates.

A double-layer steel box girder bridge installation method adopts the combined bracket for double-layer steel box girder bridge installation; and performing the following steps:

constructing the combined bracket for mounting the double-layer steel box girder bridge;

hoisting the main body structure of the lower-layer steel box girder and fixing the main body structure on the lower-layer bracket;

hoisting an upper layer steel box girder main body structure and fixing the upper layer steel box girder main body structure on the upper layer bracket;

hoisting an upper-layer steel box girder cantilever and fixing the upper-layer steel box girder cantilever on the upper-layer steel box girder main body;

welding seams of the upper layer steel box girder main body structure and the lower layer steel box girder main body structure are respectively welded;

unloading the upper steel box girder;

hoisting a lower-layer steel box girder cantilever and fixing the lower-layer steel box girder cantilever on the lower-layer steel box girder main body structure;

and unloading the main structure of the lower-layer steel box girder.

Furthermore, the upper steel box girder cantilever is two, and the symmetry is fixed upper steel box girder major structure both sides.

Furthermore, the cantilever of the upper steel box girder is welded on the main structure of the upper steel box girder.

Furthermore, lower floor's steel box girder cantilever is two, and the symmetry is fixed lower floor's steel box girder major structure both sides.

Furthermore, the lower layer steel box girder cantilever is welded on the lower layer steel box girder main body structure.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

according to the combined support for mounting the double-layer steel box girder bridge, the upper layer support and the lower layer support with the height difference are formed, and the lower layer steel box girder main body structure and the upper layer steel box girder main body structure are supported at the same time, so that the upper layer steel box girder and the lower layer steel box girder can be constructed synchronously, and the construction efficiency is greatly improved; meanwhile, the support is simple in structure and convenient and fast to construct, and the construction efficiency is further improved; more importantly, the combined type support occupies small area, can support the upper-layer structure and the lower-layer structure simultaneously, has high use efficiency, and can complete stable and reliable supporting operation in a limited operation space. On the basis of combined type support, the cooperation installation method hoists lower floor's steel box girder major structure, upper steel box girder cantilever and lower floor's steel box girder cantilever in proper order to engineering machine adaptation that can pass through less specification is more complicated, narrow and small operating space, the hoist and mount of each subassembly of high-efficient orderly completion, simultaneously, can also effectively avoid the problem such as the damage of colliding with each other of operation between the layer. On the other hand, the double-layer synchronous construction mode requires few auxiliary structures, the specification requirement of the engineering machinery is low, and the operation flow is simplified, so that the operation cost is relatively lower, the construction efficiency is higher, and the labor intensity is lower.

Drawings

FIG. 1 is a schematic structural view of a combined bracket for mounting a double-layer steel box girder bridge, which is provided by the invention;

fig. 2 is a left side view of the combined bracket for mounting the double-layer steel box girder bridge provided by the invention.

Detailed Description

The embodiment of the application provides a double-layer steel box girder bridge installation method and a combined support for installation, and solves the technical problems that in the prior art, the double-layer steel box girder bridge is complex in installation process, long in period, mutually influenced between layers and high in cost under the municipal complex environment.

In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the specification, and it should be understood that the embodiments and specific features of the embodiments of the present invention are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features of the embodiments and examples of the present application may be combined with each other without conflict.

Referring to fig. 1 and 2, a sectional bracket for mounting a double-deck steel box girder bridge includes: the device comprises a first column set 5, a first cross beam 3, a second column set 6, a second cross beam 1 and a base plate 10.

The first set of posts 5 includes: the first cross beam 3 is fixed on the first upright columns to form a lower layer bracket; the second set of posts 6 comprises: the second cross beam 1 is fixed on the second upright columns to form an upper layer bracket; the first upright columns and the second upright columns are fixed on the base plate 10; wherein the height of the first upright is lower than the height of the second upright; thereby forming a stable bracket structure with high-low fall. Thereby can realize the synchronous stay construction of upper and lower two-layer, promote operating efficiency by a wide margin.

In this embodiment, the plurality of first columns and the plurality of second columns are vertically arranged in parallel, and the plurality of first columns are located inside the plurality of second columns; that is, a nested gantry-like support structure is formed.

In order to improve the stability of the bracket, the first upright post is fixedly connected with the second upright post; that is, the first and second uprights are secured together to form a unitary pillar structure.

Generally, the first and second pillars may be lattice pillars.

Further, the first beam 3 is connected with the first columns through first gusset plates, and the second beam 1 is connected with the second columns through second gusset plates.

In this embodiment, the first gusset plate and the second gusset plate may adopt a conventional gusset plate 9.

It should be noted that, in the present embodiment, the first beam 3 is fixed by two parallel beams through the first cross link 4; similarly, the second beam 1 is fixed by two parallel beams via a second cross-member 2.

The embodiment provides a method for installing a double-layer steel box girder bridge, which comprises the following steps:

constructing a combined bracket with an upper bracket and a lower bracket;

hoisting the lower-layer steel box girder main body structure 8 and fixing the lower-layer steel box girder main body structure on the lower-layer bracket;

hoisting an upper-layer steel box girder main body structure 7 and fixing the upper-layer steel box girder main body structure on the upper-layer support;

hoisting two upper steel box girder cantilevers, wherein the first upper steel box girder cantilever and the first upper steel box girder cantilever are symmetrically arranged and welded on the upper steel box girder main body 7;

welding seams of the upper layer steel box girder main body structure and the lower layer steel box girder main body structure are respectively welded;

unloading the upper steel box girder;

hoisting a lower layer steel box girder cantilever, generally two, of which the number is two, a first lower layer steel box girder cantilever and a first lower layer steel box girder cantilever are symmetrically arranged and welded on the lower layer steel box girder main body structure 8;

and unloading the lower-layer steel box girder main body structure 8.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

according to the installation method of the double-layer steel box girder bridge, the combined type support with the lower-layer support and the upper-layer support is constructed to sequentially bear and fix the lower-layer steel box girder main body structure and the upper-layer steel box girder main body structure respectively, so that construction of related bridge structures can be synchronously executed, and construction efficiency is greatly improved; it is worth explaining that, hoist lower floor's steel box girder major structure, upper steel box girder cantilever and lower floor's steel box girder cantilever in proper order to can adapt to more complicated through the engineering machine tool of less specification, narrow and small operating space, the hoist and mount of each subassembly of high-efficient orderly completion, simultaneously, can also effectively avoid the problem such as the damage of colliding with each other of operation between the layer. On the other hand, the double-layer synchronous construction mode requires few auxiliary structures, the specification requirement of the engineering machinery is low, and the operation flow is simplified, so that the operation cost is relatively lower, the construction efficiency is higher, and the labor intensity is lower. Meanwhile, in a municipal scene, the upper and lower steel box girders can be supported simultaneously by adopting a double-layer combined type, so that the integral stability of the structure is good; after the lower-layer steel box girder is hoisted to the designed position, the upper-layer steel box girder can be hoisted after temporary fixation, the efficiency is high, and the road occupation period is short; the main body structures of the upper and lower steel box girders can be welded simultaneously, so that the construction period is shortened; the lower cantilever structure is light in weight, general hoisting equipment can meet hoisting requirements, and the influence on roads is small.

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.