CN210827064U

CN210827064U - Concrete composite beam

Info

Publication number: CN210827064U
Application number: CN201921679113.3U
Authority: CN
Inventors: 聂晴晴
Original assignee: Zhengzhou University
Current assignee: Zhengzhou University
Priority date: 2019-10-09
Filing date: 2019-10-09
Publication date: 2020-06-23
Anticipated expiration: 2029-10-09

Abstract

The utility model provides a concrete composite beam, this concrete composite beam include the roof beam body and arrange at a supporting beam of roof beam body downside, each be equipped with respectively on the supporting beam and be used for perforating with the fixed bolt of the roof beam body, be equipped with the through-hole that communicates with each bolt perforation one-to-one on the roof beam body, the roof beam body is equipped with the grout hole in the outside of through-hole, the grout hole is linked together with the through-hole. The utility model discloses a roof beam body and a supporting beam among the concrete combination beam pass through bolted connection, need not secondary concrete cast-in-place, easily construction and installation, and the time limit for a project obviously shortens. The gap at the joint of the bolt and the supporting beam and the beam body is filled with high-performance chemical steel-pasting glue through a grouting hole reserved on the beam body in advance to achieve compactness, so that the working performance of the bolt and the supporting beam can be better exerted. The rubber packing ring is laid at the joint of the beam body and the supporting beam to prevent slurry leakage, so that compactness is further increased. And a rubber gasket is laid between adjacent beam bodies, so that the leakage of the chemical steel paste glue is prevented.

Description

Concrete composite beam

Technical Field

The utility model relates to a concrete composite beam.

Background

With the continuous propulsion of novel urbanization processes and the proposal of a recyclable structure concept, a strong-force sustainable and low-carbon bridge structure becomes an important direction for the development of the current engineering structure. At present, a large number of medium and small span bridges have been used for 30-40 years, and due to the long-term action of overloaded vehicles, lack of maintenance, low early design load and the like, the bridge is seriously damaged, the service life is greatly shortened, and the replacement is urgently needed. The combined recyclable bridge structure is produced at the same time. The combined recyclable bridge structure has the characteristics of high structural strength, strong yield resistance and small stress deformation of the traditional single bridge structure, has the advantages of easiness in construction, good economic benefit, recyclability and the like, can give full play to the performance advantages of the combined structure, improves the quality of the highway bridge, conforms to the development trend of green, energy-saving and environmental protection, helps to promote the transformation and upgrading of highway construction, and is the mainstream direction of the development of the current bridge structure.

The concrete composite beam is a common composite beam, but the traditional concrete composite beam has low assembly degree, is not beneficial to construction and maintenance and has long construction period. In addition, the ductility of the steel plate is poor, the bridge body is complex to replace, the assembly and construction are inconvenient, and the manufacturing cost is high. Therefore, the post-cast strip assembled concrete composite beam is available, and the post-cast strip can be used only when the concrete reaches the age. Therefore, compared with the traditional steel-concrete composite beam, the post-cast strip assembled concrete composite beam only facilitates construction, but the construction period is still long.

Currently, a large number of scholars are studying bolt-assembled concrete composite girders. The common bolt assembly type concrete composite beam has the problems of unreliable joint surface connection and lower structural rigidity; and because the bolt consumption is large, the precision requirement on the concrete slab, especially the bolt hole of the slab is high, so that the manufacturing process of the concrete slab is complex, the assembly construction is inconvenient, and the manufacturing cost is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a concrete composite beam to solve the technical problem that the concrete composite beam construction that uses among the prior art is inconvenient, construction cost is high, construction cycle is long.

In order to achieve the above object, the utility model relates to a technical scheme that concrete combination roof beam adopted is: the concrete composite beam comprises a beam body and supporting beams arranged on the lower side of the beam body, wherein bolt through holes used for being fixed with the beam body are formed in each supporting beam, through holes communicated with the bolt through holes in a one-to-one correspondence mode are formed in the beam body, grouting holes are formed in the outer side of the through holes of the beam body, and the grouting holes are communicated with the through holes.

As a further improvement to the above technical solution, the number of the bolt through holes is four, the four bolt through holes are respectively located at four corners of the support beam, the number of the grouting holes is two, the two grouting holes are located inside the four through holes corresponding to the bolt through holes, and each grouting hole is communicated with the two through holes.

As a further improvement to the technical scheme, the grouting holes penetrate through the upper side and the lower side of the beam body, and the grouting holes are horizontally communicated with the through holes.

As a further improvement to the technical scheme, a rubber gasket is arranged between the supporting beam and the beam body.

As a further improvement to the above technical solution, the supporting beam is an i-beam, and the supporting beam has a plurality of supporting beams, and the plurality of supporting beams are arranged on the lower side of the beam body.

As a further improvement to the technical scheme, the upper side of the through hole is provided with a nut counter bore.

The utility model has the advantages that: the utility model discloses a roof beam body and a supporting beam among the concrete combination beam pass through bolted connection, need not secondary concrete cast-in-place, easily construction and installation, and the time limit for a project obviously shortens. The gap at the joint of the bolt and the supporting beam and the beam body is filled with high-performance chemical steel-pasting glue through a grouting hole reserved on the beam body in advance to achieve compactness, so that the working performance of the bolt and the supporting beam can be better exerted. The rubber packing ring is laid at the joint of the beam body and the supporting beam to prevent slurry leakage, so that compactness is further increased. And a rubber gasket is laid between adjacent beam bodies, so that the leakage of the chemical steel paste glue is prevented.

Drawings

Fig. 1 is a schematic sectional view of a concrete composite beam according to the present invention;

fig. 2 is a schematic structural view of a beam body in the concrete composite beam of the present invention.

In the figure: 1. a concrete beam body; 2. a through hole; 3. grouting holes; 4. a bolt; 5. a nut; 6. and supporting the beam.

Detailed Description

The following describes embodiments of the present invention with reference to the accompanying drawings.

The utility model relates to a concrete combination beam's concrete embodiment, as shown in fig. 1 and 2, concrete combination beam includes the roof beam body and arranges a supporting beam 6 at the roof beam body downside, and a supporting beam 6 has a plurality ofly, and a plurality of supporting beams 6 are at the parallel interval arrangement in the left and right sides direction.

In this embodiment, the support beam 6 is an i-beam, and the beam body is a precast concrete beam body 1. The upper side of the I-shaped steel beam is contacted with the lower side of the concrete beam body 1. Bolts 4 penetrating through the upper side and the lower side are arranged at the four corners of each I-shaped steel beam, through holes 2 penetrating through the bolts 4 correspondingly are arranged on the concrete beam body 1, and the bolts 4 are arranged in the bolts 4 penetrating holes and the through holes 2 in a penetrating mode. The upper side of the through-hole 2 has a countersunk structure for the entry of a nut 5 for connection with the upper end of a bolt 4.

In this embodiment, the hole of the bolt 4 is the same as the hole of the through hole 2, and the hole of the bolt 4 and the hole of the through hole 2 are larger than the diameter of the bolt 4. The concrete beam body 1 has the grout hole 3 that runs through both sides about the concrete beam body 1 in the outside of through-hole 2, and grout hole 3 includes the horizontal intercommunication portion that is linked together with through-hole 2, and chemical steel paste glue enters into to through-hole 2 through grout hole 3 in, and it is sealed to fill up the clearance between 4 and the bolt perforation, makes the junction of bolt 4 and I shaped steel roof beam and concrete beam body 1 more closely knit. The through holes 2 communicated with one I-shaped steel beam in a one-to-one correspondence mode on the concrete beam body 1 are four, two grouting holes 3 are formed in the four communication holes 2, and the two grouting holes 3 are arranged at intervals in the front-back direction. The grout hole 3 of front side and two through-holes 2 intercommunications of front side, and the grout hole 3 of rear side is linked together with two through-holes 2 of rear side.

The through holes 2 and the grouting holes 3 on the concrete beam body 1 are prefabricated, the concrete beam body 1 is arranged on the upper side of the I-shaped steel beam when the concrete beam is used, and the through holes 2 on the concrete beam body 1 are communicated with the through holes 4 on the I-shaped steel beam in a one-to-one correspondence mode. In order to prevent the chemical steel paste from leaking from the contact part of the concrete beam body 1 and the I-shaped steel beam. And a second rubber gasket is arranged between the concrete beam body 1 and the I-shaped steel beam and used for preventing the leakage of the poured chemical steel-pasting glue. A first rubber gasket is arranged between two adjacent concrete beam bodies 1 in the front-rear direction and used for preventing the leakage of poured chemical steel paste glue.

In this embodiment, the upper side of the concrete beam body 1 is provided with an asphalt concrete pavement layer for enhancing the flatness of the bridge deck. The left end and the right end of the concrete beam body 1 are respectively provided with a railing for enhancing the safety of the bridge.

Use the utility model discloses a concrete composite beam is arranged in the bridge for the example, during the construction, the concrete beam body 1 processing prefabrication that has I-shaped steel roof beam and downside the second rubber packing ring in mill finishes earlier. When the bridge is installed on site, the I-shaped steel beam is firstly hoisted to be positioned on the support on the bridge pier, then the concrete beam body 1 is hoisted to be positioned on the I-shaped steel beam, and the through holes 2 of the concrete beam body 1 are communicated with the through holes 4 of the I-shaped steel beam in a one-to-one correspondence mode. The bolt 4 is installed and applied to 30% of the design tightening force by a torque wrench, and the second rubber washer is compressed due to the structural deadweight and the pre-tightening force. And repeating the steps, and installing all the I-shaped steel beams and the beam bodies. And pressure grouting is carried out on all grouting holes 3 to enable the bolts 4 and the bolt 4 to be perforated, the concrete beam body 1 and the I-shaped steel beam to be compacted and the concrete beam body 1 to be compacted. The torque wrench is again used to apply 100% of the design tightening force to all bolts 4, at the same time as the slurry is further injected into the void. And finishing the bridge deck pavement.

The utility model discloses a concrete composite beam makes bolt 4 and bolt 4 perforate between, between concrete beam body 1 and the I-shaped steel roof beam, reach closely knit between concrete beam body 1 and concrete beam body 1 through pouring into chemical steel paste glue in 3 to grout holes.

Compared with the prior art, the utility model discloses a concrete combination roof beam has following advantage:

the working difficulty of the concrete composite beam transportation and hoisting of the utility model is obviously reduced; the beam body is connected with the supporting beam 6 through the bolt 4, secondary concrete cast-in-place is not needed, the installation and construction are easy, and the construction period is obviously shortened. The gap between the bolt 4 and the joint of the support beam 6 and the beam body is filled with high-performance chemical steel-pasting glue through the grouting hole 3 reserved on the beam body in advance to achieve compactness, so that the working performance of the bolt and the grouting hole can be better exerted. The rubber gasket is laid at the joint of the beam body and the supporting beam 6 to prevent slurry leakage, so that compactness is further increased. And rubber gaskets are paved between the adjacent beam bodies to fully achieve the compactness.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention in this embodiment.

Claims

1. A concrete composite beam is characterized in that: including the roof beam body and arrange at roof beam body downside supporting beam, each be equipped with respectively on the supporting beam and be used for the bolt perforation fixed with the roof beam body, be equipped with the through-hole that communicates with each bolt perforation one-to-one on the roof beam body, the roof beam body is equipped with the grout hole in the outside of through-hole, the grout hole is linked together with the through-hole.

2. The concrete composite beam according to claim 1, wherein: the bolt perforation has four, and four bolt perforations are located a supporting beam's four corners department respectively, the grout hole has two, and two grout holes are located inside four through-holes that correspond with the bolt perforation, and every grout hole is linked together with two through-holes.

3. The concrete composite beam according to claim 1 or 2, wherein: the grouting holes penetrate through the upper side and the lower side of the beam body and are horizontally communicated with the through holes.

4. The concrete composite beam according to claim 1 or 2, wherein: and a rubber gasket is arranged between the supporting beam and the beam body.

5. The concrete composite beam according to claim 1 or 2, wherein: the supporting beam is I-shaped steel and is provided with a plurality of supporting beams which are arranged on the lower side of the beam body.

6. The concrete composite beam according to claim 1 or 2, wherein: and a nut counter bore is arranged on the upper side of the through hole.