CN205348391U - Take prefabricated beam column rebar mechanical connection node of lag - Google Patents

Abstract

The utility model discloses a prefabricated beam-column reinforcement mechanical connection node with a protective cover, which comprises a prefabricated upper column, a prefabricated lower column and a prefabricated composite beam. The bottom of the prefabricated upper column longitudinal reinforcement is reserved for the longitudinal reinforcement at the bottom of the upper column; the bottom of the prefabricated upper column is also equipped with embedded anchor bolts and protective sleeves, and the protective sleeve is detachably connected to the embedded anchor bolts; the height of the protective sleeve is greater than that of the upper The length of the longitudinal reinforcement reserved at the bottom of the column. The prefabricated lower column longitudinal reinforcement in the prefabricated lower column protrudes from the top of the prefabricated lower column, and the protruding part of the top of the prefabricated lower column longitudinal reinforcement is called the reserved longitudinal reinforcement at the top of the lower column. The prefabricated composite beam is spliced between the prefabricated upper column and the prefabricated lower column, and the longitudinal reinforcement reserved at the bottom of the upper column and the reserved longitudinal reinforcement at the top of the lower column are connected at the nodes through mechanical connection joints; the prefabricated composite beam and the prefabricated upper column, The joint joints of the prefabricated lower columns are filled with cast-in-place concrete. After adopting the above structure, the direct connection performance of the column joints can be enhanced, and the bearing capacity and reliability of the joints can be improved.

Description

A prefabricated beam-column reinforcement mechanical connection node with protective cover

technical field

The utility model relates to a connection form of prefabricated beam-column cast-in-place joints, which belongs to the field of prefabricated assembly structures, in particular to a prefabricated beam-column reinforcement mechanical connection joint with a protective cover.

Background technique

With the development of construction industrialization, the continuous improvement of environmental protection requirements and labor shortage, the application of prefabricated structures is becoming more and more extensive. The prefabricated structure has the advantages of fast construction and high degree of mechanization. At the same time, it can save a lot of materials and labor, and effectively reduce construction noise and construction dust.

The prefabricated structure adopts factory prefabricated beams, slabs and columns, which are assembled at the construction site and poured at the joints to achieve reliable connection of the structure and ensure the integrity of the structure. The cast-in-place joint is the core of the prefabricated structure, and the connection between columns is the key.

At present, the common form of column connection is the sleeve grouting type. For the structural diagram, please refer to Shanghai Atlas DBJT08-116-2013 "Assembled Integral Concrete Residential Construction Node Atlas".

The above-mentioned sleeve grouting type column connection form is specifically: the longitudinal reinforcement reserved at the top of the lower column protrudes out of the structural plane, inserted into the reserved sleeve at the bottom of the upper column, and then grouted into the sleeve to realize the connection of the upper and lower columns.

The above-mentioned connection form of sleeve grouting has the advantage of simple construction, but the reliability of this method is not high, the connection between the upper and lower columns is completely dependent on grouting, the longitudinal steel bars of the columns are not directly connected, the size of the hole is small, and the compactness of the grouting is not easy to guarantee. Moreover, the post-casting method is used for grouting, which has poor integrity and cannot guarantee the transmission of horizontal force. The tensile, bending and shear bearing capacity of the joints is not high, which seriously restricts its application.

Utility model content

The technical problem to be solved by the utility model is to provide a prefabricated beam-column steel bar mechanical connection node with a protective cover, which can strengthen the column joint. Direct connection performance, improve node bearing capacity and reliability.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

A prefabricated beam-column reinforcement mechanical connection node with a protective sleeve includes a prefabricated upper column, a prefabricated lower column and a prefabricated composite beam.

The prefabricated upper column longitudinal reinforcement in the prefabricated upper column protrudes from the bottom of the prefabricated upper column, and the protruding part of the bottom of the prefabricated upper column longitudinal reinforcement is called the reserved longitudinal reinforcement at the bottom of the upper column; the bottom of the prefabricated upper column is also provided with embedded anchor bolts And the protective cover, the protective cover is detachably connected with the embedded anchor bolt; the height of the protective cover is greater than the length of the longitudinal reinforcement reserved at the bottom of the upper column.

The prefabricated lower column longitudinal reinforcement in the prefabricated lower column protrudes from the top of the prefabricated lower column, and the top protruding part of the prefabricated lower column longitudinal reinforcement is called the reserved longitudinal reinforcement at the top of the lower column.

The prefabricated composite beam is spliced between the prefabricated upper column and the prefabricated lower column, and the longitudinal reinforcement reserved at the bottom of the upper column and the reserved longitudinal reinforcement at the top of the lower column are connected at the joints through mechanical connection joints; the prefabricated composite beam and the prefabricated upper column, The joint joints of the prefabricated lower columns are filled with cast-in-place concrete.

The longitudinal reinforcement at the bottom of the beam in the prefabricated composite beam is also connected by mechanical connection joints at the joints.

The beam reinforcement in the prefabricated composite beam extends into the cast-in-situ concrete.

The protective cover is arranged at the bottom corner of the prefabricated upper column.

The protective cover is angle steel.

After the utility model adopts the above-mentioned structure, it has the following beneficial technical effects:

1. The use of the above-mentioned mechanical connection joints can significantly increase the reliability of the column-beam connection and greatly improve the bearing capacity of the nodes. At the same time, concrete can be used for one-time cast-in-place at the joints, which can avoid secondary grouting and increase the construction speed. Further, the use of sleeves and high-strength cement slurry is avoided to save engineering cost.

2. The use of the above protective cover, on the one hand, can protect the reserved longitudinal ribs at the bottom of the upper column and prevent the reserved longitudinal ribs at the bottom of the upper column from being damaged during hoisting; on the other hand, it can ensure that the reserved longitudinal ribs at the bottom of the upper column and the lower The accuracy of the alignment connection of the longitudinal reinforcement reserved at the top of the column.

Description of drawings

Fig. 1 shows a structural schematic diagram of a prefabricated beam-column reinforcement mechanical connection node with a protective sleeve of the present invention.

Figure 2 shows the front view of the prefabricated upper column.

Figure 3 shows a schematic cross-sectional structural view of the bottom of the prefabricated upper column.

detailed description

The utility model will be described in further detail below in conjunction with the accompanying drawings and specific preferred embodiments.

The utility model prefabricated beam-column reinforcement mechanical connection node with protective cover mainly includes prefabricated upper column 1, prefabricated lower column 2, prefabricated laminated beam 3, prefabricated upper column longitudinal reinforcement 4, reserved longitudinal reinforcement 41 at the bottom of upper column, prefabricated 5 longitudinal reinforcements of the lower column, 51 reserved longitudinal reinforcements at the top of the lower column, 6 longitudinal reinforcements at the upper part of the beam, 7 longitudinal reinforcements at the bottom of the beam, 8 stirrups of the beam, 9 waist reinforcements of the beam, 91 reserved waist reinforcements, 10 mechanical connection joints, pre-embedded Technical features such as anchor bolt 11, cast-in-place concrete 12, protective cover 13, laminated layer 14 and beam height H.

As shown in Figure 1, a prefabricated beam-column reinforcement mechanical connection node with a protective cover includes a prefabricated upper column, a prefabricated lower column, a prefabricated composite beam, a mechanical connection joint, a pre-embedded anchor bolt and a protective cover.

Prefabricated composite beams include beam upper longitudinal reinforcement, beam bottom longitudinal reinforcement, beam stirrups, beam waist reinforcement and laminated layers.

The prefabricated upper column longitudinal reinforcement in the prefabricated upper column protrudes from the bottom of the prefabricated upper column, and the protruding part of the bottom of the prefabricated upper column longitudinal reinforcement is called the reserved longitudinal reinforcement at the bottom of the upper column.

The bottom of the prefabricated upper column is also provided with a pre-embedded anchor bolt and a protective cover, and the protective cover is detachably connected to the pre-embedded anchor bolt; the height of the protective cover is greater than the length of the reserved longitudinal reinforcement at the bottom of the upper column.

As shown in Figure 2 and Figure 3, when the protective cover is installed, the anchor bolts are pre-embedded at the bottom of the prefabricated upper column, and the protective cover is preferably added to the corner of the bottom column of the prefabricated upper column. fixed by anchor bolts.

The prefabricated lower column longitudinal reinforcement in the prefabricated lower column protrudes from the top of the prefabricated lower column, and the top protruding part of the prefabricated lower column longitudinal reinforcement is called the reserved longitudinal reinforcement at the top of the lower column.

The prefabricated composite beam is spliced between the prefabricated upper column and the prefabricated lower column, and the longitudinal reinforcement reserved at the bottom of the upper column and the reserved longitudinal reinforcement at the top of the lower column are connected at the joints through mechanical connection joints; the prefabricated composite beam and the prefabricated upper column, The joint joints of the prefabricated lower columns are filled with cast-in-place concrete.

Further, the longitudinal reinforcement at the bottom of the beam in the above-mentioned prefabricated composite beam is also connected by mechanical connection joints at the joints.

Further, the beam reinforcement in the above-mentioned prefabricated composite beam extends into the cast-in-place concrete.

Taking the construction of a multi-storey concrete factory building as an example below, the prefabricated beam-column reinforcement mechanical connection node with a protective cover of the present invention will be described in detail.

The column section size of the prefabricated upper column and the prefabricated lower column are both 800mmx800mm, the storey height is 8.0m, and the beam height is 1200mm. Now it is necessary to cast in-situ the beam-column joint area, and the length of the prefabricated upper column and the prefabricated lower column are both 6.8m.

After calculation, the length of the reserved longitudinal reinforcement at the bottom of the upper column is 200mm, and the length of the reserved longitudinal reinforcement at the top of the lower column is 1000mm.

The connection process of prefabricated beam-column reinforcement mechanical connection nodes is as follows.

1. Firstly, hoist the prefabricated composite beams and panels in place, and use mechanical connection joints to connect the longitudinal reinforcement at the bottom of the beams.

2. The prefabricated upper column is hoisted. During hoisting, the angle steel is supported on the ground, which can effectively protect the reserved longitudinal ribs at the bottom of the upper column and prevent them from being damaged. In addition, it can also ensure that the longitudinal ribs reserved at the bottom of the upper column and the top of the lower column are reserved The accuracy of alignment connection of longitudinal reinforcement.

3. After the prefabricated upper column is hoisted in place, remove the protective cover to expose the reserved longitudinal ribs at the bottom of the upper column and the reserved longitudinal ribs at the top of the lower column, align the two and connect them with mechanical joints, and then bind the node area of the column Stirrups. At this time, the exposed part of the embedded anchor bolt can be cut off.

4. Filling with cast-in-place concrete: pour concrete in the joint area and concrete on the surface of the laminated beam slab (that is, the laminated layer).

According to calculations, after the prefabricated beam-column reinforcement mechanical connection nodes are connected, the nodes can withstand wind loads and slight disturbances during construction, and the whole process is completed in one pouring, which effectively saves construction procedures and time.

The preferred embodiment of the utility model has been described in detail above, but the utility model is not limited to the specific details in the above-mentioned embodiment, and within the scope of the technical concept of the utility model, various equivalent transformations can be carried out to the technical solution of the utility model , these equivalent transformations all belong to the protection scope of the present utility model.

Claims (5)

1. the prefabricated beam column steel concrete supporting node with protective jacket, including prefabricated upper prop, prefabricated lower prop and Prefabricated superposed beam, it is characterised in that:

The vertical muscle of prefabricated upper prop in prefabricated upper prop stretches out from the bottom of prefabricated upper prop, and the base projection of the vertical muscle of prefabricated upper prop is called the reserved vertical muscle in column bottom；Prefabricated upper column bottom is additionally provided with cast-in fixing bolt and protective jacket, and protective jacket and cast-in fixing bolt removably connect；The height of protective jacket reserves the length of vertical muscle more than upper column bottom；

The vertical muscle of prefabricated lower prop in prefabricated lower prop stretches out from the top of prefabricated lower prop, and the top extension of the vertical muscle of prefabricated lower prop is called the reserved vertical muscle in lower column top；

Prefabricated superposed beam splices between prefabricated upper prop and prefabricated lower prop, and the reserved vertical muscle of the reserved vertical muscle in upper column bottom and lower column top is attached by mechanical connecting joint at node place；The node place of splicing mutually of Prefabricated superposed beam and prefabricated upper prop, prefabricated lower prop is filled with cast-in-place concrete.

2. the prefabricated beam column steel concrete supporting node with protective jacket according to claim 1, it is characterised in that: bottom the beam in described Prefabricated superposed beam, vertical muscle is also adopted by mechanical connecting joint at node place and is attached.

3. the prefabricated beam column steel concrete supporting node with protective jacket according to claim 1, it is characterised in that: the beam waist muscle in described Prefabricated superposed beam stretches in cast-in-place concrete.

4. the prefabricated beam column steel concrete supporting node with protective jacket according to claim 1, it is characterised in that: described protective jacket is arranged on edge bottom prefabricated upper prop.

5. the prefabricated beam column steel concrete supporting node with protective jacket according to claim 4, it is characterised in that: described protective jacket is angle steel.