CN112127515A - Precast concrete external wall panel connection device - Google Patents

Abstract

The invention discloses a prefabricated concrete external wall panel connection device, which has firm connection and convenient construction. The prefabricated concrete external wall panel connection device of the present invention is used for detachably and fixedly connecting the prefabricated concrete wall panel (2) and the prefabricated concrete column (1). a channel (3), a transverse channel (4) fixed on the upper end face of the concrete wall panel (2), and an L-shaped steel plate (5) with bolt holes (51, 52) pre-drilled on both arms; The profiled steel plate (5) is detachably and fixedly connected to the vertical channel (3) through the first hammerhead screw (6a), and is detachably and fixedly connected to the horizontal channel (4) through the second hammerhead screw (6b).

Description

Precast concrete external wall panel connection device

technical field

The invention belongs to the technical field of prefabricated concrete structures in construction engineering, in particular to a connection device for prefabricated concrete external wall panels.

Background technique

At present, prefabricated buildings are one of the development directions of modern buildings in my country, and prefabricated concrete external wall panels are one of the important components of the prefabricated building system. If the precast concrete external wall panel is improperly connected to the main structure, there may be no relative displacement between the precast concrete external wall panel and the main structure, and the installation error cannot be adjusted. Under external loads such as wind and earthquake, the precast concrete external wall panel is prone to occur. damage, there is a safety hazard.

At present, the connection methods between precast concrete wall panels and the main structure mainly include pure pendant type connection and pure pre-buried connection reinforced concrete connection.

Pre-embedded connection steel bars are poured into concrete connection, and one or two rows of pre-embedded steel bars are arranged along the entire length of the external wall panel, and then concrete is used to cast the connecting steel bars as a whole.

When using pure pre-embedded connecting steel bars for concrete connection, although the safety of the wall panels can be ensured, it is difficult to connect the pre-embedded steel bars along the entire length of the wall panels. The construction of the upper structure of the main structure must be completed after the installation of the external wall panels on the same layer, which will affect the construction progress.

The pure pendant type connection is connected by a metal pendant that is pre-installed on the wall panel and the main structure; the structure of the metal pendant is as described in the Chinese invention patent application "An Outer Wall Panel Connection Structure" (application number: CN201910768156.7 Publication date: 20191108) , including steel beams extending horizontally from left to right, and upper branch connection nodes and lower branch connection nodes arranged on the steel beams and distributed up and down for installing upper and lower wall panels, respectively, and the lower branch connection nodes include installation The lower first bolt and the lower second bolt on the steel beam and extending in the front and rear direction, the screw rod of the lower first bolt extends forward from the back of the lower wall panel into the interior of the lower wall panel and is locked , the screw head of the lower second bolt abuts on the back of the lower wall panel, and the adjustability and stability are better.

When pure pendant type connection is used, the safety factor cannot be guaranteed during installation and use and under earthquake action, especially in high-rise buildings, which has higher seismic requirements for the structure;

Therefore, the existing problems in the prior art are: the safety of the connection device of the precast concrete external wall panel is not high;

There is also the defect that the flexibility is not good enough, which leads to the difficulty of construction.

The above problems limit the application and development of prefabricated concrete frame structures.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a prefabricated concrete external wall panel connection device, which is firm in connection and convenient in construction.

The technical scheme that realizes the object of the present invention is:

A prefabricated concrete external wall panel connection device for detachably and fixedly connecting a prefabricated concrete wall panel 2 and a prefabricated concrete column 1, characterized in that:

The connecting device includes a vertical channel 3 fixed on the connecting side of the concrete column 1, a transverse channel 4 fixed on the upper end face of the concrete wall panel 2, and an L-shaped steel plate 5 with bolt holes 51 and 52 pre-opened on both arms. ;

The L-shaped steel plate 5 is detachably and fixedly connected to the vertical channel 3 through a first hammer screw 6a, and is detachably and fixedly connected to the horizontal channel 4 through a second hammer screw 6b.

Compared with the prior art, the significant advantages of the present invention are:

1. The connection is firm: the present invention pre-embeds the channel on the prefabricated column and the prefabricated plate, and the bolt can move freely within the length of the channel to avoid the failure of the main structure and the prefabricated plate due to manufacturing errors; L-shaped steel plate There are bolt holes projected as rectangles. Under the action of seismic load, the bolts can have a certain displacement along the length of the bolt holes, increasing the overall deformation capacity; L-shaped steel plates can improve the overall energy dissipation capacity of the connection; the connection process All of them are connected by bolts, and there is a certain dimensional error in the installation process, and the energy is limited to achieve the purpose of shortening the construction period.

2. Convenience in construction: the present invention can ensure the safety performance of the external precast concrete external wall panel, the seismic performance of the structure is better, and at the same time, it can improve the connection efficiency between the precast panel and the main structure in the horizontal direction on site, which is beneficial to shorten the construction period. It has obvious technical advantages and has the prospect of large-scale promotion and application.

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

Description of drawings

FIG. 1 is a schematic structural diagram of a precast concrete external wall panel connection device of the present invention.

FIG. 2 is a schematic diagram of the three-dimensional structure of FIG. 1 .

FIG. 3 is a schematic structural diagram of the L-shaped steel plate with bolt holes in FIG. 1 .

FIG. 4 is a schematic structural diagram of the anchoring channel in FIG. 1 .

FIG. 5 is a schematic diagram of the structure of the channel anchoring rib in FIG. 1 .

In the figure, prefabricated concrete column 1, prefabricated concrete wall panel 2, vertical channel 3 and horizontal channel 4, L-shaped steel plate 5, bolt holes 51, 52, first and second hammer head screws 6a, 6b, vertical Limiting piece 7a and horizontal limiting piece 7b, vertical sliding block 8a, horizontal sliding block 8b, anchoring ribs 9a, 9b.

Detailed ways

As shown in Figures 1 and 2, the prefabricated concrete wall panel connection device of the present invention is used for detachably and fixedly connecting the prefabricated concrete wall panel 2 and the prefabricated concrete column 1. The vertical channel 3, the transverse channel 4 fixed on the upper end face of the concrete wall panel 2, and the L-shaped steel plate 5 with bolt holes 51 and 52 pre-drilled on both arms;

The L-shaped steel plate 5 is detachably and fixedly connected to the vertical channel 3 through a first hammer screw 6a, and is detachably and fixedly connected to the horizontal channel 4 through a second hammer screw 6b.

As shown in FIG. 3 , two arms of the L-shaped steel plate 5 are pre-opened with rectangular holes 51 and 52 with arcuate ends.

As an improvement, as shown in FIG. 1, a vertical slider 8a and a lateral slider 8b are also included;

The vertical slider 8a is placed inside the vertical channel 3, and is connected with the end of the first hammer screw 6a;

The transverse slider 8b is placed inside the transverse channel 4 and is connected with the end of the second hammer screw 6b;

As a further improvement, a vertical limit piece 7a and a horizontal limit piece 7b are also included;

The vertical limiting piece 7a is placed on the outer side of the vertical arm of the L-shaped steel plate 5, and is sleeved on the first hammer head screw 6a;

The horizontal limiting piece 7b is placed on the upper side of the horizontal arm of the L-shaped steel plate 5, and is sleeved on the second hammer head screw 6b.

The vertical channel 3 is fixedly connected to the steel frame of the prefabricated column 1 through the anchoring bars 9a, and is integrally cast with the concrete column 1 and fixed to the connection side of the concrete column 1;

The transverse channel 4 is fixedly connected to the steel skeleton of the concrete wall panel 2 through the anchoring bars 9b, and is integrally cast with the concrete wall panel 2 and fixed on the upper end surface of the concrete wall panel 2.

The anchoring channel 3 and the anchoring channel 4 are respectively fixed on the prefabricated column 1 and the prefabricated plate 2 by using metal clips 9a and 9b;

The anchoring channel 3 and the anchoring channel 4 are respectively pre-installed with hammerhead bolts and hammerhead screws 6a and 6b, and slide blocks 8a and 8b are installed at the hammerhead position of the bolt, so that the hammerhead bolt can slide freely in the channel. ;

The hammer head screws 6a and 6b with the sliders are inserted into the L-shaped steel plate, respectively install the vertical limit piece 7a and the horizontal limit piece 7b, tighten the nuts, pour concrete on the upper part of the laminated board, and complete the prefabricated board and the horizontal limit piece 7b. Connections between prefabricated columns.

The on-site construction and assembly process of a connection device between a precast concrete horizontal slab and a precast column of the present invention is as follows:

The channel 3 is fixed on one side of the prefabricated column with a metal clip 9a, the end of the hammer screw 6a is covered with a slider 8a, and the hammer screw with the slider is installed in the channel 3; The metal clip 9b is fixed on the upper surface of the prefabricated plate, the end of the hammer head screw 6b is covered with the slider 8b, and the hammer head screw with the slider is installed into the channel 4; it will be pre-installed in the channel 3 and the channel 4. The hammer-head screws 6a and 6b in the middle are penetrated into the bolt holes of the L-shaped steel plate 5, and the vertical limit pieces 7a and 7b are placed on the hammer-head screws 6a and 6b, and the nuts are tightened. Connection between prefabricated slabs and prefabricated columns.

The invention makes full use of the principle of energy consumption and shock absorption, and the L-shaped steel plate is provided with a bolt hole projected as a rectangle, so as to ensure that the bolt can have a certain deformation ability along the direction of the bolt hole under the action of the earthquake load. , so as to improve the seismic performance of the overall structure; and the L-shaped steel can increase the energy dissipation capacity at the connection nodes.

In the present invention, the connecting device is connected by bolts, which is easy to operate, and can effectively improve the construction efficiency on site, thereby shortening the construction period; all the screws of the connecting device are arranged in the anchoring channel with sliders, and can be adjusted along the channel direction. Free sliding brings great convenience to on-site assembly work; it has obvious technical advantages and has the prospect of large-scale promotion and application.

Advantages include:

(1) The present invention arranges channels on the prefabricated components, which makes on-site installation more convenient and improves on-site work efficiency;

(2) Bolts with sliders are arranged in the channel, and the bolts can slide freely in the channel, avoiding the trouble of not being connected due to installation errors;

(3) The L-shaped steel plate can be prefabricated in advance, assembled and constructed, saving energy and no pollution, and the construction is safe and reliable;

(4) The connection of the present invention adopts a bolt hole with a projection as a rectangle, which can limit the degeneration ability of the connection node and improve the seismic performance of the overall structure;

(5) The connection device of the present invention is fixed by bolts, the connection method is simple and reliable, and the position is accurate.

As shown in FIG. 3, the L-shaped steel plate (5) of the present invention can be prefabricated in a factory, and holes are opened according to the connection requirements of the prefabricated plate and the prefabricated column.

It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can also be made, and these improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims (5)

1. A prefabricated concrete external wall panel connecting device for detachably and fixedly connecting a prefabricated concrete wall panel (2) and a prefabricated concrete column (1), characterized in that: The connecting device includes a vertical channel (3) fixed on the connecting side of the concrete column (1), a transverse channel (4) fixed on the upper end face of the concrete wall panel (2), and both arms are pre-drilled with bolt holes ( 51, 52) L-shaped steel plate (5); The L-shaped steel plate (5) is detachably and fixedly connected to the vertical channel (3) through the first hammer head screw (6a), and is detachable to the horizontal channel (4) through the second hammer head screw (6b). fixed connection. 2. The precast concrete external wall panel connection device according to claim 1, is characterized in that: Two arms of the L-shaped steel plate (5) are pre-opened with rectangular holes (51, 52) whose ends are arc-shaped. 3. The precast concrete external wall panel connection device according to claim 1 is characterized in that: Also includes a vertical slider (8a) and a lateral slider (8b); The vertical slider (8a) is placed inside the vertical channel (3), and is connected with the end of the first hammer screw (6a); The transverse slider (8b) is placed inside the transverse channel (4), and is connected with the end of the second hammer screw (6b). 4. The precast concrete external wall panel connection device according to claim 3 is characterized in that: Also includes a vertical limit piece (7a) and a horizontal limit piece (7b); The vertical limiting piece (7a) is placed on the outer side of the vertical arm of the L-shaped steel plate (5), and is sleeved on the first hammer head screw (6a); The horizontal limiting piece (7b) is placed on the upper side of the horizontal arm of the L-shaped steel plate (5), and is sleeved on the second hammer head screw (6b). 5. The precast concrete external wall panel connection device according to claim 1 is characterized in that: The vertical channel (3) is fixedly connected with the reinforced frame of the prefabricated column (1) through the anchoring bars (9a), and is integrally cast with the concrete column (1) and fixed on the connection side of the concrete column (1); The transverse channel (4) is fixedly connected to the reinforced frame of the concrete wall panel (2) through the anchoring bars (9b), and is integrally cast with the concrete wall panel (2) and fixed on the upper end face of the concrete wall panel (2).

Images