CN214362819U

CN214362819U - Modularization precast concrete lid roof beam

Info

Publication number: CN214362819U
Application number: CN202120080300.0U
Authority: CN
Inventors: 刘朵; 彭宗卿; 张建东; 史国刚; 周海川; 闵剑勇; 周倩
Original assignee: JSTI Group Co Ltd
Current assignee: JSTI Group Co Ltd
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-10-08
Anticipated expiration: 2031-01-13

Abstract

The utility model discloses a modularization precast concrete bent cap, include: the cover beam comprises a cover beam frame body, a plurality of parallel and level cabins are arranged in the cover beam frame body and along the direction of a beam body, the cover beam frame body and the cabins are both of steel shell structures, concrete is filled in the cabins, concrete is filled between the cabins and the cover beam frame body, a plurality of cushion blocks are arranged between the bottom plate of the cabin and the bottom plate of the cover beam frame body, and a plurality of through prestressed pore channels are arranged in the prefabricated cover beam; the utility model discloses carry out the piecemeal with large-scale bent cap, can avoid because the transportation that whole large-scale bent cap tonnage is heavier and cause, hoist and mount inconvenience, adopt the mode of steel casing-concrete cast in situ concrete simultaneously to there is prestressing force to be connected, the wholeness is better, can reduce the risk that probably meets among the prior art, improves the security in the work progress.

Description

Modularization precast concrete lid roof beam

Technical Field

The utility model relates to a bridge construction technical field especially relates to a modularization precast concrete bent cap.

Background

Since the fifties of the last century, with the great progress of science and technology, the economic and cultural levels are improved comprehensively, and people put forward higher requirements on bridge construction. In recent 40 years, the bridge construction level in China has also been developed rapidly. With the development of bridge construction level and construction process, it becomes possible to build high-difficulty and high-technology bridges with larger span, more complex construction forms, more severe bridge site environments and the like. The structural form of the bridge is new, and a large number of bridges with novel forms are developed. The design and construction level of arch bridges, suspension bridges and cable-stayed bridges all step into international advanced level ranks, and arch beam combination and cable-stayed suspension cable combination bridges appear. The super bridges which draw attention such as the cross-sea bridge in the Bay of Jiaozhou, the cross-sea bridge in the Bay of Hangzhou and the like are built in succession, so that the bridge building level of China is a new step.

The bent cap is an important component of the bridge, and the structural safety of the bent cap is of great importance to the overall safety of the bridge. It acts to support the bridge span structure and to transmit the constant load and variable load effects of the car etc. to the substructure. The capping beam, in addition to horizontal, vertical and bending moments generated by the structure itself, is also subjected to wind forces, as well as possible seismic forces, ice pressure, impact forces from ships, rafts or drifters.

However, as the use demand increases, the weight of many capping beams can reach hundreds of tons, and thus, the transportation and the hoisting are inconvenient. If a large-scale bent cap is adopted, a heavy crane is needed to lift the bent cap, certain safety risk exists, meanwhile, the crane occupies a large area, and certain influence is caused on the traffic condition around a construction site.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a modularization precast concrete bent cap for solve the overweight of weight of bent cap, the inconvenient technical problem of site operation.

In order to achieve the above object, the utility model provides a modularization precast concrete bent cap, include: the box body structure comprises a cover beam frame body, wherein a plurality of parallel and level cabins are arranged in the cover beam frame body and along the direction of a beam body, the cover beam frame body and the cabins are both of steel shell structures, the appearances of the cabins are cuboid or square, concrete is filled in the cabins, concrete is filled between the cabins and the cover beam frame body as well as between the cabins and the cover beam frame body, and a plurality of cushion blocks are arranged between a bottom plate of the cabin and the bottom plate of the cover beam frame body;

a plurality of through prestressed ducts are arranged inside the precast bent cap, the prestressed ducts penetrate through the cabin, and through prestressed ribs are arranged inside the prestressed ducts;

six surfaces of the bent cap frame body and the cabin are all corrugated steel plates; the parts of the outer shell of the cabin except the bottom plate are provided with welding nails.

Furthermore, the bottom plate of the cover beam frame and the bottom plate of the cabin have the same corrugation direction, and the corrugations are parallel to the bridge.

Furthermore, the cushion blocks are arranged between the wave troughs of the cover beam frame bottom plate and the wave troughs of the cabin bottom plate.

Furthermore, the width of the cushion block is 10mm, and the width of the wave trough on the bottom plate of the cover beam frame body is 10mm larger than that of the wave trough on the bottom plate of the cabin.

Furthermore, four cabins and two prestressed ducts are arranged inside the precast bent cap, the two prestressed ducts are a first prestressed duct and a second prestressed duct, the first prestressed duct is in a horizontal straight line shape, penetrates through the four cabins, and is arranged at the lower ends of the insides of the four cabins;

the second prestressed duct penetrates through the four cabins and is arranged at the upper ends of the insides of the four cabins, and the parts of the second prestressed duct, which are positioned at the cabins at two sides, are in a slope line shape and are symmetrical with the center line of the cover beam frame;

the parts of the second prestressed ducts of the two cabins at the two sides are lifted from the edge of the cover beam frame body to the center of the cover beam frame body, and the parts of the second prestressed ducts of the two cabins at the middle are in a horizontal straight line shape.

The utility model has the advantages that:

the utility model discloses it is heavy to the large-scale concrete bent cap tonnage of tradition, hoist and mount are inconvenient, have the potential safety hazard scheduling problem to improve. In addition, the light in weight of prefab can adopt conventional mechanical equipment to construct, and the equipment requirement is low, is convenient for transport, assembles, more importantly, the utility model discloses can reduce the risk that probably runs into in the current work progress, improve the security in the work progress.

Drawings

Fig. 1 is a schematic structural view of a prefabricated capping beam according to example 1.

Fig. 2 is a front view of the prefabricated capping beam of embodiment 1.

Fig. 3 is a longitudinal sectional view of the prefabricated capping beam of example 1.

Fig. 4 is a partially enlarged view of a portion a in fig. 3.

Fig. 5 is a side view of a prefabricated capping beam according to example 1.

Fig. 6 is a transverse cross-sectional view of the prefabricated capping beam of example 1.

Fig. 7 is a front view of the inner leftmost compartment of the prefabricated capping beam of example 1.

Fig. 8 is a front view of the middle two cabins inside the precast capping beam of example 1.

In the figure, 1-bent cap frame, 2-cabin, 3-cushion block, 41-first prestressed duct, 42-second prestressed duct, 5-welding nail and 6-concrete.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1 to 8, the present embodiment provides a modular precast concrete bent cap, including: the bent cap framework 1 is equipped with the cabin 2 of four parallel and level inside the bent cap framework 1 and along the direction of the roof beam body, and bent cap framework 1 and cabin 2 are the box hat structure, and specific speaking, in this embodiment, the appearance of cabin 2 is cuboid or square all can, and the bottom plate of bent cap framework 1 and the bottom plate of cabin 2 have the same ripple direction, and the ripple is parallel with the bridge.

The inside concrete 6 that is filled in cabin 2, between cabin 2 and the cabin 2 to and the packing has concrete 6 between cabin 2 and the bent cap framework 1, be equipped with a plurality of cushions 3 between the bottom plate of cabin 2 and the bottom plate of bent cap framework 1, cushion 3 sets up between the trough of bent cap framework 1 bottom plate and the trough of cabin 2 bottom plate, more specifically says that cushion 3 width is 10mm, and the size of trough is wider 10mm on the size ratio cabin 2 bottom plate on the bottom plate of bent cap framework 1.

Two through prestressed ducts are arranged inside the precast bent cap, the two prestressed ducts are a first prestressed duct 41 and a second prestressed duct 42, the first prestressed duct 41 is in a horizontal linear shape, penetrates through the four cabins 2, and is arranged at the lower ends inside the four cabins 2; the second prestressed ducts 42 pass through the four cabins 2 and are disposed at the upper ends of the interiors of the four cabins 2, the portions of the second prestressed ducts 42 located in the cabins 2 on both sides are symmetrical and in a state of presenting a slope line, specifically, symmetrical with respect to the center line of the lintel frame 1, the two slope lines rise from the edge of the lintel frame 1 to the center of the lintel frame 1, and the portions of the second prestressed ducts 42 located in the two cabins 2 in the middle are horizontal lines.

Six surfaces of the bent cap frame body 1 and the cabin 2 are corrugated steel plates; the parts of the enclosure of the cabin 2 other than the floor are provided with weld studs 5.

The utility model discloses carry out the piecemeal with large-scale bent cap, can avoid because the transportation that whole large-scale bent cap tonnage is heavier and cause, hoist and mount inconvenience, adopt the mode of steel casing-concrete cast in situ concrete simultaneously to there is prestressing force to be connected, the wholeness is better, can reduce the risk that probably meets among the prior art, improves the security in the work progress.

Example 2

The embodiment provides a construction method of a modular precast concrete bent cap, which specifically comprises the following steps:

step S1, manufacturing a cabin according to design requirements, and detecting the quality to be qualified;

step S2, erecting a bent cap frame body on a construction site;

step S3, the manufactured cabin is transported to a construction site, and the cabin is installed in the cover beam frame;

and S4, inserting prestressed tendons into the prestressed duct reserved in the cabin in advance, tensioning and anchoring the prestressed tendons, and paying attention to the tensioning time of the prestressed tendons in the tensioning process to avoid the phenomenon that the tensioning time is too long or too short, so that the quality of the engineering is influenced.

And step S5, pouring high-strength concrete between cabins and between the cabins and the cover beam frame.

The details of the present invention are well known to those skilled in the art.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A modular precast concrete bent cap, comprising: the box body structure comprises a cover beam frame body, wherein a plurality of parallel and level cabins are arranged in the cover beam frame body and along the direction of a beam body, the cover beam frame body and the cabins are both of steel shell structures, the appearances of the cabins are cuboid or square, concrete is filled in the cabins, concrete is filled between the cabins and the cover beam frame body as well as between the cabins and the cover beam frame body, and a plurality of cushion blocks are arranged between a bottom plate of the cabin and the bottom plate of the cover beam frame body;

2. A modular precast concrete capping beam according to claim 1, characterised in that the floor of the capping beam frame and the floor of the cabin have the same corrugation direction, the corrugations being parallel to the bridge.

3. A modular precast concrete capping beam as claimed in claim 2, characterised in that the spacers are located between the troughs of the capping frame floor and the troughs of the cabin floor.

4. A modular precast concrete capping beam as claimed in claim 3 wherein the width of the head blocks is 10mm and the size of the troughs on the capping frame floor is 10mm wider than the size of the troughs on the deck floor.

5. The modular precast concrete cap beam of claim 4, wherein the precast cap beam is internally provided with four compartments and two pre-stressed ducts, the two pre-stressed ducts being a first pre-stressed duct and a second pre-stressed duct, the first pre-stressed duct being horizontally linear, passing through the four compartments, and being provided at the lower ends of the insides of the four compartments;