CN209129260U - Prestressed Prefabricated Concrete Beams - Google Patents

Abstract

A prestressed assembled concrete beam, the concrete beam includes an upper beam plate and a lower beam plate, the bottom surface of the upper beam plate is provided with at least a pair of adjacent positioning teeth and positioning grooves, and the top surface of the lower beam plate is provided with There are at least a pair of adjacent positioning teeth and positioning grooves, the upper beam plate and the lower beam plate are positioned by the positioning teeth and the positioning grooves, and the contact surfaces of the upper beam plate and the lower beam plate are fixedly connected by an adhesive. The upper beam plate and the lower beam plate are correspondingly provided with a number of vertical prestressed holes, the prestressed holes are provided with prestressed anchors, and the prestressed anchors are used to apply vertical prestress to connect the upper beam plate and The lower sill plate is fixed. The utility model does not need to pour concrete again, nor does it need to support formwork, thus reducing the production cost, increasing the installation speed, reducing the labor cost, and realizing the rapid construction of the beam and slab; At the same time of shearing action, the overall performance of the combined system can be greatly improved.

Description

Prestressed Prefabricated Concrete Beams

technical field

The utility model relates to the technical field of prefabricated concrete beams, in particular to a prestressed assembled concrete beam.

Background technique

Prefabricated concrete structure (prefabricated concrete structure) is the abbreviation of prefabricated concrete structure. Prefabricated reinforced concrete structure is one of the important directions for the development of building structures in my country. It is conducive to the development of building industrialization in China, improving production efficiency, saving energy, developing green and environmentally friendly buildings, and helping to improve and ensure the quality of construction projects. Compared with the cast-in-place construction method, the prefabricated concrete structure is conducive to green construction, because the prefabricated construction can better meet the requirements of green construction, such as land saving, energy saving, material saving, water saving and environmental protection, and reduce the negative impact on the environment. Including reducing noise, preventing dust, reducing environmental pollution, clean transportation, reducing site disturbance, saving water, electricity, materials and other resources and energy, following the principle of sustainable development.

There are many kinds of connection forms of prefabricated concrete structures, and there is no uniformity at present. According to the construction method, it can be divided into two categories: dry connection and wet connection. Dry connection means that the concrete is not poured during the connection, but steel plates or steel parts are arranged in the components, and the purpose of connection is achieved by on-site bolts or welding. Wet connection is to anchor the reserved steel bars of prefabricated components to adjacent components by pouring concrete, mortar and other materials. Compared with dry-connected prefabricated concrete structures, wet-connected concrete prefabricated components have the characteristics of uniform force, high safety performance and less hidden dangers. However, most of the current wet-connection methods are by pouring concrete and other materials, and the concrete forming process is more troublesome and difficult to achieve. Pollution to the surrounding environment, and construction is more inconvenient.

Utility model content

The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art, and provide a prestressed assembled concrete beam, which can realize industrialized production, without the need for concrete pouring or formwork for rapid assembly on site, thereby reducing production costs and improving installation. speed, reduce labor costs, and achieve rapid construction of beams and slabs.

For achieving the above object, the technical scheme adopted by the present utility model is as follows:

A prestressed assembled concrete beam, the concrete beam includes an upper beam plate and a lower beam plate, the bottom surface of the upper beam plate is provided with at least a pair of adjacent positioning teeth and positioning grooves, and the top surface of the lower beam plate is provided with There are at least a pair of adjacent positioning teeth and positioning grooves, the upper beam plate and the lower beam plate are positioned by the positioning teeth and the positioning grooves, and the contact surfaces of the upper beam plate and the lower beam plate are fixedly connected by an adhesive. The upper beam plate and the lower beam plate are correspondingly provided with a number of vertical prestressed holes, and prestressed anchors are arranged on the prestressed holes. The prestressed anchors are used to apply vertical prestress to connect the upper beam plate and The lower sill plate is fixed.

It can be seen from the above that the utility model utilizes the upper beam plate and the lower beam plate to coordinate and position through the positioning teeth and the positioning groove, and uses the adhesive to bond and fix the contact surfaces of the upper beam plate and the lower beam plate, and finally uses the prestressing force. The anchors apply vertical prestress to fix the upper beam and the lower beam, and the whole process does not need to pour concrete or support formwork, reduce production costs, improve installation speed, reduce labor costs, and achieve rapid construction of beams and plates; and The lap joint interface of the precast concrete beams and slabs is matched by tooth slots, which can greatly improve the overall performance of the combined system while meeting the shear resistance effect of the interface; the contact surfaces of the upper girder slab and the lower girder slab of the utility model are fixedly connected by adhesive , The flatness requirement is lower, which can ensure uniform force transmission and more convenient construction.

As an improvement of the present invention, the cross-sectional shape of the concrete beam is a rectangular cross-section or a box-shaped cross-section.

Further, the cross-sectional shapes of the positioning teeth and the positioning grooves are trapezoidal cross-sections or square cross-sections.

Further, the binder is epoxy resin.

As an improvement of the present utility model, the top surface of the upper beam plate is provided with countersunk holes at the prestressed holes, and the bottom surface of the lower beam plate is provided with countersunk holes at the prestressed holes, and the prestressed anchors are fixed on the bottom surface of the lower beam plate. After the prestressed hole, pour cement slurry into the prestressed anchor through the countersunk hole and the countersunk hole to seal and fix the anchorage.

Further, the cement slurry is composed of cement, superplasticizer and retarder, and the weight ratio of the cement, superplasticizer and retarder is 100:3:3.

Compared with the prior art, the utility model has the following advantages:

The utility model does not need to pour concrete again, and also does not need to support formwork, reduces the production cost, increases the installation speed, reduces the labor cost, and realizes the rapid construction of beams and slabs;

In addition, the lap joint interface of precast concrete beams and slabs is matched with tooth slots, which can greatly improve the overall performance of the combined system while meeting the shear resistance effect of the interface;

The contact surfaces of the upper beam plate and the lower beam plate of the utility model are fixedly connected by adhesive, the flatness requirement is low, the uniform force transmission can be ensured, and the construction is more convenient;

The prestressed anchor is sealed in the prestressed hole by cement slurry. The prestressed hole can prevent the wear of the prestressed anchorage, so that the prestressed anchorage can give full play to its superior tensile performance and corrosion resistance.

Description of drawings

Fig. 1 is the schematic diagram of the utility model prestressed prefabricated concrete beam;

FIG. 2 is a schematic diagram of the upper beam plate and the lower beam plate of the prestressed assembled concrete beam of the present invention.

Reference numerals: 1-upper beam plate, 2-lower beam plate, 3-positioning teeth, 4-positioning groove, 5-adhesive, 6-prestressed hole, 7-prestressed anchor, 8-upper counterbore , 9- sink hole, 10- cement paste.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention, the directional indications are only used to explain a certain posture (such as the accompanying drawings). When the relative positional relationship, movement situation, etc. between the various components shown below), if the specific posture changes, the directional indication also changes accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for the purpose of description, and should not be construed as instructions or Implicit their relative importance or implicitly indicate the number of technical features indicated. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection required by the present utility model.

Example

Please refer to FIG. 1 and FIG. 2 , a prestressed assembled concrete beam, the concrete beam includes an upper beam plate 1 and a lower beam plate 2, and the bottom surface of the upper beam plate 1 is provided with at least a pair of adjacent positioning teeth 3 And the positioning groove 4, the top surface of the lower beam plate 2 is provided with at least a pair of adjacent positioning teeth 3 and positioning grooves 4, the upper beam plate 1 and the lower beam plate 2 are displaced by the positioning teeth 3 and the positioning grooves 4. Coordinate and position, and the contact surfaces of the upper beam plate 1 and the lower beam plate 2 are fixedly connected by the adhesive 5; The holes 6 are provided with prestressed anchors 7 , and the prestressed anchors 7 are used to apply vertical prestress to fix the upper beam plate 1 and the lower beam plate 2 .

It can be seen from the above that the utility model utilizes the upper beam plate and the lower beam plate to coordinate and position through the positioning teeth and the positioning groove, and uses the adhesive to bond and fix the contact surfaces of the upper beam plate and the lower beam plate, and finally uses the prestressing force. The anchors apply vertical prestress to fix the upper beam and the lower beam, and the whole process does not need to pour concrete or support formwork, reduce production costs, improve installation speed, reduce labor costs, and achieve rapid construction of beams and plates; and The lap joint interface of the precast concrete beams and slabs is matched by tooth slots, which can greatly improve the overall performance of the combined system while meeting the shear resistance effect of the interface; the contact surfaces of the upper girder slab and the lower girder slab of the utility model are fixedly connected by adhesive , The flatness requirement is lower, which can ensure uniform force transmission and more convenient construction.

In this embodiment, the cross-sectional shape of the concrete beam is a rectangular cross-section or a box-shaped cross-section.

In this embodiment, the cross-sectional shape of the positioning teeth 3 and the positioning grooves 4 is a trapezoidal section or a square cross-section, preferably a trapezoidal section, because the positioning teeth and positioning grooves with a trapezoidal cross-section are easier to assemble and locate.

In this embodiment, the adhesive 5 is epoxy resin.

In this embodiment, the top surface of the upper beam plate 1 is provided with an upper countersunk hole 8 at the prestressed hole 6, and the bottom surface of the lower beam plate 2 is provided with a countersunk hole 9 at the prestressed hole 6. After the anchor 7 is fixed in the prestressed hole, the prestressed anchor 7 is filled with cement slurry 10 through the countersunk hole 8 and the countersunk hole 9 for sealing and anchoring. The prestressed anchor is sealed in the prestressed hole by cement slurry. The prestressed hole can prevent the wear of the prestressed anchorage, so that the prestressed anchorage can give full play to its superior tensile performance and corrosion resistance.

In this embodiment, the cement slurry 10 is composed of cement, superplasticizer and retarder, and the weight ratio of the cement, superplasticizer and retarder is 100:3:3.

The construction process of the above-mentioned prestressed prefabricated concrete beam is as follows:

Prefabricated upper and lower beam plates with positioning teeth and positioning grooves;

Correspondingly open prestressed holes in the upper beam plate and the lower beam plate;

The upper beam plate and the lower beam plate are transported to the construction site, and after the upper beam plate and the lower beam plate are positioned and matched by the positioning teeth and the positioning groove, the upper beam plate and the lower beam plate are bonded together with epoxy resin;

The prestressed anchor is assembled in the prestressed hole;

The prestressed anchorage applies vertical prestress to fix the upper beam plate and the lower beam plate;

The prestressed anchors are poured and fixed with cement paste.

The above-mentioned embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited by the above-mentioned embodiments, and any other changes, modifications, and substitutions made without departing from the spirit and principle of the present utility model , combination and simplification, all should be equivalent replacement methods, which are all included in the protection scope of the present invention.

Claims (5)

1. A prestressed assembled concrete beam, the concrete beam comprises an upper beam plate and a lower beam plate, it is characterized in that: the bottom surface of the upper beam plate is provided with at least a pair of adjacent positioning teeth and positioning grooves, the The top surface of the lower beam plate is provided with at least a pair of adjacent positioning teeth and positioning grooves. Fixed and connected by adhesive; the upper beam plate and the lower beam plate are correspondingly provided with a number of vertical prestressed holes, prestressed holes are provided with prestressed anchors, and the prestressed anchors are used to apply vertical prestress The upper beam plate and the lower beam plate are fixed. 2 . The prestressed fabricated concrete beam according to claim 1 , wherein the cross-sectional shape of the concrete beam is a rectangular cross-section or a box-shaped cross-section. 3 . 3 . The prestressed fabricated concrete beam according to claim 1 , wherein the cross-sectional shapes of the positioning teeth and the positioning grooves are trapezoidal cross-sections or square cross-sections. 4 . 4 . The prestressed fabricated concrete beam according to claim 1 , wherein the adhesive is epoxy resin. 5 . 5 . The prestressed fabricated concrete beam according to claim 1 , wherein the top surface of the upper beam plate is provided with countersunk holes at the prestressed holes, and the bottom surface of the lower beam plate is provided at the prestressed holes. 6 . There are sinkholes. After the prestressed anchors are fixed in the prestressed holes, the prestressed anchors are filled with cement slurry through the upper sinkholes and the sinkholes to seal and fix the anchors.