阅读说明：本技术 一种大跨度贝雷桥施工工法 (Construction method of large-span Bailey bridge ) 是由 戴公强 李海利 郝建波 揭振兴 宣泽鹏 冉琳 白鹏鹏 李树茂 任兴龙 张赫洋 王 于 2021-08-11 设计创作，主要内容包括：本发明公开了一种大跨度贝雷桥施工工法,涉及桥梁施工技术领域。本发明包括有以下步骤：混凝土基础浇筑,在两个陆地之间浇筑若干个混凝土基础,用以对贝雷桥进行支撑；桁架搭设,在混凝土基础的外侧搭设桁架；桥跨拼接,对多个桥跨进行拼装,并对拼装完成的多个桥跨进行编号；桥跨定位安装,将多个桥跨安装至混凝土基础的上端,并进行组装,形成一个完整的贝雷桥；桁架拆除。本发明通过混凝土基础浇筑、桁架搭设、桥跨拼接、桥跨定位安装、桁架拆除等步骤对桥梁进行搭设,能够大大的缩短施工的工期,且施工成本较低,对设备的需求较少,质量可控度较高。(The invention discloses a construction method of a large-span Bailey bridge, and relates to the technical field of bridge construction. The invention comprises the following steps: pouring concrete foundations, namely pouring a plurality of concrete foundations between two lands for supporting the Bailey bridge; erecting a truss, namely erecting the truss on the outer side of the concrete foundation; splicing the bridge spans, namely splicing the bridge spans, and numbering the spliced bridge spans; positioning and mounting bridge spans, namely mounting a plurality of bridge spans to the upper end of a concrete foundation, and assembling to form a complete Bailey bridge; and (4) dismantling the truss. According to the invention, the bridge is erected through the steps of concrete foundation pouring, truss erection, bridge span splicing, bridge span positioning installation, truss dismantling and the like, so that the construction period can be greatly shortened, the construction cost is lower, the requirement on equipment is less, and the quality controllability is higher.)

1. A construction method of a large-span Bailey bridge is characterized by comprising the following steps:

pouring concrete foundations (2), and pouring a plurality of concrete foundations (2) between two lands (1) for supporting the Bailey bridge;

erecting a truss, namely erecting the truss on the outer side of the concrete foundation (2);

splicing the bridge spans (3), and numbering the spliced bridge spans (3);

positioning and mounting the bridge spans (3), mounting a plurality of bridge spans (3) to the upper end of the concrete foundation (2), and assembling to form a complete Bailey bridge;

and (4) dismantling the truss, namely dismantling the panel, the cross beam, the support frame and the truss piece.

2. The construction method of the large-span beret bridge according to claim 1, wherein the concrete foundation (2) is composed of at least an abutment and a coping, the abutment is cast by C25 concrete, and the coping is cast by C30 concrete.

3. The construction method of the large-span Bailey bridge according to claim 1, wherein the truss erection comprises the following steps:

the truss pieces are erected, and a plurality of truss pieces are arranged between the two land areas (1);

erecting a support frame, wherein the support frame is erected on two adjacent truss pieces for reinforcing the truss pieces;

erecting a cross beam, wherein the cross beam is erected at the upper end of the support frame;

and (5) paving a panel, namely paving the panel at the upper end of the cross beam.

4. The construction method of the large-span Bailey bridge according to claim 3, wherein the truss sheets, the support frames, the cross beams and the panels are all made of Q345B steel.

5. The construction method of the large-span Bailey bridge according to claim 1, wherein the splicing of the bridge span (3) comprises the following steps:

assembling the bridge span (3);

the bridge spans (3) are numbered, and the bridge spans (3) are named as a No. 1 supporting bridge, a No. 2 supporting bridge, … and an N supporting bridge in sequence.

6. The construction method of the large-span Bailey bridge as claimed in claim 5, wherein the assembling sequence of the bridge span (3) is as follows: lower chord → lower flat longitudinal coupling → crossbeam → anti-wind pull rod → montant → upper chord → upper flat longitudinal coupling → transverse coupling → truss assembly → dragging, lengthening → girder dragging in place → bridge deck pavement of a protective net → acceptance.

7. The construction method of the large-span Bailey bridge according to claim 5, wherein the positioning and installation of the bridge span (3) comprises the following steps:

the bridge span (3) is adjusted in position, mechanical equipment (4) is sequentially used for driving the bridge spans (3) to horizontally move on the truss until the bridge spans (3) move to the installation position;

the bridge is dropped, the bridge span (3) is dropped to the upper end of the concrete foundation (2), and the bridge span (3) is connected with the concrete foundation (2);

and assembling the bridge spans (3), and connecting the bridge spans (3) to form a complete Bailey bridge.

8. The construction method of the large-span Bailey bridge as claimed in claim 7, wherein the position of the bridge span (3) is adjusted sequentially from No. 1 supporting bridge to No. 2 supporting bridge to No. … and N supporting bridge.

Technical Field

The invention belongs to the technical field of bridge construction, and particularly relates to a construction method of a large-span Bailey bridge.

Background

With the development of the hydropower construction cause in China, the cascade development of hydropower of most rivers extends to the upstream, the engineering sites are mostly located in western mountainous areas with complex terrain and inconvenient traffic, bridges serving main engineering also frequently cross rivers with torrential water flow, and the construction sites are often located in mountainous areas with rare human smoke, traffic and inconvenience;

in the prior art, the construction period is long when the bridge is constructed, the construction cost is high, the requirement on equipment is high, and the quality controllability is low.

Disclosure of Invention

The invention aims to provide a construction method of a large-span Bailey bridge, which aims to solve the existing problems: in the prior art, the construction period is long when the bridge is constructed, the construction cost is high, the requirement on equipment is high, and the quality controllability is low.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a construction method of a large-span Bailey bridge, which comprises the following steps:

pouring concrete foundations, namely pouring a plurality of concrete foundations between two lands for supporting the Bailey bridge;

erecting a truss, namely erecting the truss on the outer side of the concrete foundation;

splicing the bridge spans, namely splicing the bridge spans, and numbering the spliced bridge spans;

positioning and mounting bridge spans, namely mounting a plurality of bridge spans to the upper end of a concrete foundation, and assembling to form a complete Bailey bridge;

and (4) dismantling the truss, namely dismantling the panel, the cross beam, the support frame and the truss piece.

Furthermore, the concrete foundation at least comprises a pier and a pier cap, wherein the pier is formed by pouring C25 concrete, and the pier cap is formed by pouring C30 concrete.

Further, the truss erection comprises the following steps:

erecting truss pieces, and arranging a plurality of truss pieces between two landings;

erecting a support frame, wherein the support frame is erected on two adjacent truss pieces for reinforcing the truss pieces;

erecting a cross beam, wherein the cross beam is erected at the upper end of the support frame;

and (5) paving a panel, namely paving the panel at the upper end of the cross beam.

Furthermore, the truss sheets, the support frames, the cross beams and the panels are all made of Q345B steel.

Further, the bridge span splicing comprises the following steps:

assembling bridge spans;

the bridge spans are numbered, and the bridge spans are named as a No. 1 supporting bridge, a No. 2 supporting bridge, … and an N supporting bridge in sequence.

Further, the bridge span assembly sequence is as follows: lower chord → lower flat longitudinal coupling → crossbeam → anti-wind pull rod → montant → upper chord → upper flat longitudinal coupling → transverse coupling → truss assembly → dragging, lengthening → girder dragging in place → bridge deck pavement of a protective net → acceptance.

Further, the bridge span positioning installation comprises the following steps:

adjusting the bridge span position, namely sequentially using mechanical equipment to drive a plurality of bridge spans to horizontally move on the truss until the bridge spans move to the installation position;

a bridge is dropped, the bridge span is dropped to the upper end of the concrete foundation, and the bridge span is connected with the concrete foundation;

and (4) assembling the bridge spans, and connecting the bridge spans to form a complete Bailey bridge.

Further, the bridge span position adjustment sequence is support bridge No. 1, support bridge No. 2, …, support bridge No. N in proper order.

The invention has the following beneficial effects:

according to the invention, the bridge is erected through the steps of concrete foundation pouring, truss erection, bridge span splicing, bridge span positioning installation, truss dismantling and the like, so that the construction period can be greatly shortened, the construction cost is lower, the requirement on equipment is less, and the quality controllability is higher.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic flow diagram of a construction method of a large-span beret bridge according to the present invention;

FIG. 2 is a schematic structural diagram of a large-span Bailey bridge according to the present invention;

FIG. 3 is a front view of a large span Berea bridge of the present invention;

fig. 4 is a construction schematic diagram of a construction method of a large-span beret bridge according to the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. land; 2. a concrete foundation; 3. a bridge span; 4. and (4) mechanical equipment.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 4, the present invention relates to a construction method of a large-span beret bridge, including the following steps:

s1: pouring concrete foundations 2, pouring a plurality of concrete foundations 2 between the two lands 1 for supporting the Bailey bridge;

referring to fig. 2 and 3, before installing the bridge span 3, a plurality of formworks are erected between two lands 1, and then concrete is poured into the formworks until the concrete is cooled and formed to form a complete concrete foundation 2;

the concrete foundation 2 at least comprises a pier and a pier cap, wherein the pier is formed by pouring C25 concrete, and the pier cap is formed by pouring C30 concrete;

s2, erecting a truss, and erecting the truss on the outer side of the concrete foundation 2;

the truss erection comprises the following steps:

s201: the truss pieces are erected, and a plurality of truss pieces are arranged between the two landings 1;

s202: erecting a support frame, wherein the support frame is erected on two adjacent truss pieces for reinforcing the truss pieces;

s203: erecting a cross beam, wherein the cross beam is erected at the upper end of the support frame;

s204: paving a panel, namely paving the panel at the upper end of the cross beam;

the truss sheets, the support frames, the cross beams and the panels are all made of Q345B steel;

s3: splicing the bridge spans 3, and numbering the spliced bridge spans 3;

the bridge span 3 splicing comprises the following steps:

s301: assembling the bridge span 3;

the assembling sequence of the bridge span 3 is as follows: lower chord → lower flat longitudinal coupling → crossbeam → anti-wind pull rod → montant → upper chord → upper flat longitudinal coupling → transverse coupling → truss assembly → dragging, lengthening → girder dragging in place → bridge deck pavement of a protective net → acceptance;

s302, numbering bridge spans 3, and sequentially naming a plurality of bridge spans 3 as a No. 1 supporting bridge, a No. 2 supporting bridge, … and a No. N supporting bridge;

s4, positioning and installing the bridge spans 3, installing a plurality of bridge spans 3 to the upper end of the concrete foundation 2, and assembling to form a complete Bailey bridge;

the positioning and installation of the bridge span 3 comprises the following steps:

s401, adjusting the positions of the bridge spans 3, and sequentially using mechanical equipment 4 to drive the bridge spans 3 to horizontally move on the truss until the bridge spans 3 move to the installation positions;

the bridge span 3 is sequentially provided with a No. 1 supporting bridge, a No. 2 supporting bridge, … and a No. N supporting bridge in the position adjusting sequence;

referring to fig. 4, when installing, the mechanical device 4 horizontally pulls the bridge span 3, so that the bridge span 3 horizontally moves on the plurality of bridge spans 3 until the bridge span 3 moves to a predetermined installation position;

s402, dropping the bridge, namely dropping the bridge span 3 to the upper end of the concrete foundation 2, and connecting the bridge span 3 with the concrete foundation 2;

s403, assembling the bridge spans 3, and connecting the bridge spans 3 to form a complete Bailey bridge;

and S5, dismantling the truss, and dismantling the panel, the cross beam, the support frame and the truss sheet.

The method for erecting the bridge through the steps can greatly shorten the construction period, and is low in construction cost and high in quality controllability.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.