CN217839735U - Quick hoisting construction structure for steel box girder closure section - Google Patents

Abstract

The utility model discloses a fast hoisting construction structure for the closing section of a steel box girder, which comprises shoulder beams arranged at both ends of a prefabricated box girder in the closing section, one end of the shoulder beam is fixedly connected with the prefabricated box beam in the closing section, and the other end extends to the prefabricated box in the closing section The beam is outside and overlapped at the cantilever end of the prefabricated box girder on both sides of the closing section. The precast box girder of the closing section is hooked by the shoulder beams at both ends and temporarily fixed at the closing position, and the precast box girder of the closing section and its two sides have been hoisted The splicing positions of the prefabricated box girders for construction are fixed and connected by means of on-site drilling through splicing plates and high-strength connecting bolts. The utility model has simple structure and ingenious design. Utilizing the pole pole principle, the prefabricated steel box girder to be closed is quickly hung at the closing position through the pole beam, and then the follow-up construction is carried out by on-site punching and connection. It is flexible, convenient, cost-saving, It has the advantages of fast closing, time saving, safety and reliability, and little impact on passing vehicles.

Description

A fast hoisting construction structure of steel box girder closing section

technical field

The utility model relates to the technical field of bridge construction, in particular to a construction structure for fast hoisting of a closing section of a steel box girder.

Background technique

With the rapid development of science and technology, more and more long-span bridges are built on municipal roads and expressways, and the structural types of bridges are becoming more and more diverse. In addition to the traditional simple-supported beam prefabricated concrete beam structure, cantilever cast concrete structure and cast-in-place concrete beam structure beams, the steel box girder has faster installation speed, easier construction quality assurance, and better earthquake resistance. Performance, lighter weight of steel structure, recyclable steel, green environmental protection and other advantages, more and more long-span bridges adopt prefabricated steel girder assembly structure.

However, the hoisting and splicing of steel box girders of most long-span flyover bridges requires disconnection or guidance, and the construction is difficult, especially in urban construction, which often does not meet the conditions. This problem has always been a major problem that needs to be solved urgently in the hoisting of long-span flyover bridges. Especially when the newly-built long-span bridge crosses some highways, expressways, main roads and other traffic arteries, due to the heavy traffic flow, the cross-over construction will have a great impact on the crossed roads, so the construction time should be reduced as much as possible. However, conventional prefabricated steel box girders are installed in the way of pre-drilling and then hoisting and splicing. In the actual construction process, this installation method is prone to failure to align the holes due to insufficient drilling precision, resulting in nest work and The problem of delayed lifting time.

Utility model content

The purpose of the utility model is to propose a fast hoisting construction structure for the closing section of a steel box girder to solve the technical problems described in the background technology.

In order to achieve the above-mentioned technical purpose, the utility model adopts the following technical solutions:

A fast hoisting construction structure for the closing section of a steel box girder, comprising shoulder pole beams arranged at both ends of a prefabricated box girder in the closing section, one end of the shoulder beam is fixedly connected to the prefabricated box girder in the closing section, and the other end extends outside the prefabricated box girder in the closing section And lapped at the cantilever end of the prefabricated box girder on both sides of the closing section, the precast box girder of the closing section is hooked by the shoulder beams at both ends and temporarily fixed at the closing position, and the prefabricated box girder of the closing section and the prefabricated box girder on both sides that have completed hoisting construction The splicing position of the box girder is fixed and connected by means of on-site drilling through splicing plates and high-strength connecting bolts.

Preferably, in order to improve the stability of the lap joint, the shoulder pole beams are arranged in pairs, and the two shoulder pole beams arranged in pairs are correspondingly arranged on both sides of the end of the same prefabricated box girder.

Preferably, in order to improve the structural strength of the shoulder pole beam, the shoulder pole beam is made of I-shaped steel, and the shoulder pole beam made of I-shaped steel is fixedly connected to the prefabricated box girder of the closing section through high-strength connecting bolts.

Preferably, the lower flange of the pole beam made of I-shaped steel is attached and fixed on the top plate of the prefabricated box girder, and the bolted positions of the pole beam made of I-shaped steel and the prefabricated box girder are not less than two to ensure that the pole beam and the prefabricated box girder are bolted together. Connection stability of precast box girders.

Preferably, in order to improve the connection strength, an outwardly extending expansion flange is provided at the lower flange where the shoulder-pole beam made of I-steel is bolted to the prefabricated box girder.

Preferably, in order to prevent damage and deformation of the prefabricated box girder, the bolted position of the I-beam material and the prefabricated box girder is set corresponding to the diaphragm of the prefabricated box girder.

Compared with the prior art, the beneficial effects of the utility model are: the utility model has a simple structure and ingenious design. Using the pole pole principle, the prefabricated steel box girder of the section to be closed is quickly hung at the closing position through the pole beam, and then the climbing car is used to The connection and fixation between the prefabricated box girder production sections are carried out, and the bolt holes connecting the boxes are all drilled on site, which reduces the problem of unaligned prefabricated bolt holes caused by precision problems, which leads to delays in work and construction time. It can greatly shorten the hoisting and positioning time of the box girder, and solve the problem that the closing section of the box girder hoisting on the traffic road will occupy the traffic road for a long time. Small and other advantages.

Description of drawings

The above-mentioned and/or other aspects and advantages of the present utility model will become clearer and easier to understand through the detailed description in conjunction with the following drawings, which are only schematic and do not limit the utility model, wherein:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the top view structure schematic diagram of the connection node of the prefabricated box girder and shoulder pole beam of the present invention;

Fig. 3 is a schematic diagram of the longitudinal section structure of the connection node between the prefabricated box girder and the pole beam of the present invention;

Fig. 4 is the cross-sectional structural schematic diagram of the prefabricated box girder splicing node of the present invention;

Figure 5 is a schematic diagram of the construction process of the utility model.

Reference signs: 1-prefabricated box girder, 2-shoulder beam, 3-high-strength connecting bolts, 4-splicing plate, 5-pier, 6-temporary support, 7-built road.

Detailed ways

Hereinafter, an embodiment of a construction structure for fast hoisting of a closing section of a steel box girder of the present invention will be described with reference to the accompanying drawings. The embodiments described here are specific specific implementations of the present utility model, and are used to illustrate the concept of the present utility model. They are all explanatory and exemplary, and should not be construed as limitations on the implementation of the present utility model and the scope of the present utility model. limit. In addition to the embodiments described here, those skilled in the art can also adopt other obvious technical solutions based on the claims of the application and the contents disclosed in the description, and these technical solutions include adopting any obvious changes made to the embodiments described here. Replacement and modified technical solutions.

In the description of the present utility model, it should be noted that the terms "top", "bottom", "upper", "lower", "inner", "outer", "horizontal", "vertical", "upright" etc. The orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific Azimuth configuration and operation, therefore, should not be construed as limiting the invention.

The accompanying drawings in this specification are schematic diagrams, which assist in explaining the concept of the utility model, and schematically represent the shapes of various parts and their interrelationships. Please note that in order to clearly show the structures of the components in the embodiment of the present invention, the drawings are not drawn in the same scale. The same reference numerals are used to designate the same parts.

The principles and features of the present utility model are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the utility model, and are not used to limit the scope of the utility model. Below in conjunction with Fig. 1-5, the preferred embodiment of the present utility model is described in further detail:

As shown in Figure 1, a preferred fast hoisting construction structure of a steel box girder closing section of the utility model includes shoulder pole beams 2 arranged at both ends of the prefabricated box girder 1 of the closing section, and one end of the shoulder pole beam 2 is connected to the prefabricated box girder of the closing section. 1 is fixedly connected, and the other end extends beyond the prefabricated box girder 1 of the closing section and overlaps the cantilever ends of the prefabricated box girder 1 on both sides of the closing section. The pole beams 2 are arranged in pairs, and the two pole beams 2 arranged in pairs Correspondingly arranged on both sides of the end of the same prefabricated box girder 1, the prefabricated box girder 1 of the closing section is hooked by the shoulder beams 2 at both ends and temporarily fixed at the closing position, and the prefabricated box girder 1 of the closing section and its two sides have been hoisted The splicing position of the prefabricated box girder 1 is fixedly connected through the splicing plate 4 and the high-strength connecting bolt 3 by drilling holes on site;

As shown in Figure 2-4, in order to ensure the stability of the hoisting construction structure, the pole beam 2 is made of I-beam, and the pole beam 2 made of I-beam is fixed to the prefabricated box girder 1 of the closing section through high-strength connecting bolts 3 connected, the lower flange of the shoulder pole beam 2 made of I-shaped steel is pasted and fixed on the top plate of the prefabricated box girder 1, and the bolted positions of the shoulder pole beam 2 made of I-shaped steel and the prefabricated box girder 1 are not less than two places, and the I-shaped The bolted position of the shoulder beam 2 made of steel and the prefabricated box girder 1 is set corresponding to the diaphragm of the prefabricated box girder 1, and the lower flange of the bolted position of the shoulder pole beam 2 made of I-steel and the prefabricated box girder 1 is provided with The expanded wing plate extending outward, the type, specification, length and size of the I-beam pole beam 2 are calculated and determined according to the weight of the hoisting prefabricated box girder 1 production section. Of course, according to the mechanical properties of the material structure, the pole beam 2 can be deconstructed. For materials other than beams, the length of the other end of the shoulder beam 2 I-beam hanging out of the prefabricated box girder 1 is determined by calculation according to the weight of the closed span beam and the allowable amount of structural deformation.

As shown in Figure 5, the specific construction process of the present utility model includes the following steps: production of the I-steel pole beam 2 → factory connection of the I-steel pole beam 2 with the prefabricated box girder 1 → transportation of the prefabricated box girder 1 → prefabrication on both sides of the closing section Hoisting of box girder 1 (lap both ends of prefabricated box girder 1 on pier 5 or temporary support 6) → Hoisting and lapping of prefabricated box girder 1 in the closing section above built road 7 → making section and side span of prefabricated box girder 1 in closing section Cantilever steel girders make section lap joints.

After the I-beam pole beam 2 is processed, it is connected with the prefabricated box girder 1 production section in advance in the factory. First, two I-beam pole beams 2 are installed on one end of the prefabricated box girder 1. After the installation is completed, they are installed on the other end of the prefabricated box girder 1. Two I-beam shoulder beams 2 are connected by 10.9S high-strength large hexagonal head bolts (GB1228-1231-2006). Quantity and specifications, specifications, models and lengths of I-beam beams are determined through calculation.

After the I-beam pole beam 2 is installed and passed the acceptance, it will be transported to the construction site for hoisting.

Prefabricated box girder 1 hoisting adopts single-machine hoisting or double-machine hoisting (selected according to the actual situation). Before hoisting, check the size of the closing section and the size of prefabricated box girder 1, and start hoisting after the review is correct. During the hoisting process, the closing section of the prefabricated box girder 1 Slowly hoist to the top of the closing span, and the special personnel on both sides will slowly lower the prefabricated steel beam 1 of the closing section to the closing position. After the review position is qualified, remove the hoisting equipment and start to install the splicing plate 4. The splicing plate 4 is installed with high-strength connecting bolts 3. , The bolt holes are bolted by on-site drilling, which can avoid the problems of idle work and delay in hoisting time caused by misalignment of the bolted holes. According to this method, the hoisting connection of the prefabricated box girder 1 in the closing section can be quickly completed.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (6)

1. A fast hoisting construction structure for the closing section of a steel box girder, characterized in that it includes shoulder pole beams (2) arranged at both ends of the prefabricated box girder (1) of the closing section, and one end of the shoulder pole beam (2) is connected to the prefabricated box of the closing section The beams (1) are fixedly connected, and the other end extends beyond the prefabricated box girder (1) in the closing section and overlaps the cantilever ends of the prefabricated box girders (1) on both sides of the closing section. The prefabricated box girder (1) in the closing section passes through the The shoulder pole beam (2) at the end is hooked and temporarily fixed in the closed position, and the joint position of the prefabricated box girder (1) in the closed section and the prefabricated box girder (1) that has been hoisted on both sides is passed through the splicing plate (4) and high-strength connecting bolts (3) Fixedly connected by drilling holes on site. 2. A construction structure for quick hoisting of steel box girder closing sections according to claim 1, characterized in that: the pole beams (2) are arranged in pairs, and the two pole beams (2) arranged in pairs are arranged correspondingly On both sides of the end of the same prefabricated box girder (1). 3. The fast hoisting construction structure of the closing section of steel box girder according to claim 1, characterized in that: the pole beam (2) is made of I-shaped steel, and the pole beam (2) made of I-shaped steel passes through The high-strength connecting bolts (3) are fixedly connected with the prefabricated box girder (1) of the closing section. 4. The fast hoisting construction structure of the closing section of the steel box girder according to claim 3, characterized in that: the lower flange of the shoulder pole beam (2) made of I-beam is pasted and fixed on the prefabricated box girder ( 1) On the top plate, there are no less than two positions where the pole beam (2) made of I-beam and the prefabricated box girder (1) are bolted. 5. The fast hoisting construction structure of the closing section of steel box girder according to claim 4, characterized in that: the lower wing at the bolted position of the shoulder beam (2) made of I-steel and the prefabricated box girder (1) The edge is provided with an enlarged wing plate extending outward. 6. The fast hoisting construction structure of the closing section of steel box girder according to claim 4, characterized in that: the bolted position of the shoulder beam (2) made of I-steel and the prefabricated box girder (1) corresponds to the prefabricated Diaphragm settings for box girder (1).

Images