CN111608325A - Shear key installation structure and installation method - Google Patents

Abstract

The present application proposes an installation structure and an installation method for a shear key. The installation structure for a shear key includes a column, a column base plate, a stud bolt, a reserved hole for the shear key, a short foundation column, and a shear key; the column The foot bottom plate is fixedly connected to the column, the stud bolt is pre-buried in the foundation short column, the column foot bottom plate is connected to the stud bolt, and the shear key reserved hole is formed in the foundation short column , the shear key is accommodated in the reserved hole for the shear key and protrudes from the opening of the reserved hole for the shear key, the bottom plate of the column foot is provided with a mounting hole, and the shear key passes through the Mounting holes extend into the post. The shear key is inserted into the column base plate without welding the shear key under the column base plate in advance, so that the effective use height of the modular building can be higher, and when the modular building is assembled in the factory, it is supported by the column base plate Modular buildings, avoiding the problem that pre-welded shear keys used to support modular buildings are difficult to maintain stability.

Description

Shear key installation structure and installation method

technical field

The present application relates to a building piece, in particular to an installation structure and an installation method of a shear key.

Background technique

The "Standards for Design of Steel Structures" clearly stipulates that the exposed stud bolts should not be used to bear the horizontal reaction force at the bottom of the column foot. This horizontal reaction force is borne by the friction between the bottom plate and the concrete foundation or by setting shear keys. In addition, the shear failure of the stud bolts occurs in the concrete foundation, which is not easy to find and usually difficult to take reinforcement measures. Therefore, the design of the steel structure shear key is very important in the whole steel structure design. The shear key is usually welded vertically to the horizontal steel plate on the bottom surface of the column foot with a thicker channel steel or I-beam, and is buried in the shear groove reserved in the foundation. Generally, micro-expansion concrete is used for secondary pouring.

For installations where individual components (eg columns) are pre-welded shear keys, the length of the shear keys generally does not matter. But for the modular building, the pre-welded shear key affects the effective use height of the modular building when the overall height of the modular building is limited due to transportation reasons. Due to the relatively small size of the shear key, some are even angle steel or welded cross. When the modular building is assembled in the factory, it is difficult for the pre-welded shear keys to stably support the entire modular building, and additional support structures are required to ensure the overall structural stability.

SUMMARY OF THE INVENTION

In order to solve the influence of pre-welded installation of shear keys on the effective use height of modular buildings, and the influence of pre-welded shear keys on the stability of modular buildings during the assembly process of modular buildings, the present application discloses a Scissor key installation structure and installation method.

The application provides an installation structure for a shear key, which includes a column, a bottom plate of a column foot, a stud bolt, a reserved hole for the shear key, a foundation short column, and a shear key;

The column foot bottom plate is fixedly connected to the column, the stud bolt is pre-buried in the short foundation column, the column foot bottom plate is connected to the stud bolt, and the shear key reserved hole is formed in the The foundation short column, the shear key is accommodated in the reserved hole for the shear key and protrudes from the opening of the reserved hole for the shear key, the bottom plate of the column foot is provided with a mounting hole, and the shear key passes through the hole. into the post through the mounting hole.

Preferably, the installation structure further includes a support member, the support member is disposed below the shear key, and the shear key is supported by the support member.

Preferably, the area of the top surface of the support is smaller than the area of the bottom surface of the shear key, and the bottom surface of the shear key is partially in contact with the support.

Preferably, the mounting structure further includes a nut, through which the stud base plate is connected to the stud bolt, the nut includes an upper nut and a lower nut, and the upper nut and the lower nut are respectively located at The upper and lower sides of the column base bottom plate.

Preferably, there is a secondary grouting grouting material between the top surface of the short foundation column and the bottom plate of the column foot.

Preferably, the reserved hole for the shear key has a grouting material for secondary grouting, and the shear key is fixed to the reserved hole for the shear key through the secondary grouting.

Preferably, the shear key is in the shape of a cubic column, the installation hole is a rectangular hole, and the reserved hole for the shear key is a rectangular hole.

Preferably, the size of the mounting hole is larger than the size of the shear key.

The present application also proposes a method for installing a shear key, which is used to implement the shear key installation structure described in any one of the above technical solutions, and the shear key installation method includes:

The shear key is placed in the reserved hole for the shear key at the installation site of the modular building, and the shear key is inserted into the installation hole when the column base plate is installed on the short foundation column .

Preferably, the short foundation column is a concrete or reinforced concrete column prefabricated in the factory or pre-cast on the installation site,

At the installation site of the modular building, the grouting material is poured into the reserved hole for shear keys and the gap between the bottom plate of the column foot and the top surface of the short foundation column, so that the reserved holes for shear keys are inserted. The shear key is fixed.

The shear key is inserted into the column base plate without welding the shear key under the column base plate in advance, so that the effective use height of the modular building can be higher, and when the modular building is assembled in the factory, it is supported by the column base plate The whole modular building avoids the problem that the pre-welded shear key used to support the modular building is difficult to maintain stability.

Description of drawings

FIG. 1 is a schematic diagram of the installation structure of the shear key provided by the application.

Detailed ways

Exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the application, and are not used to exhaust all possible ways of the application, nor to limit the scope of the application.

As shown in FIG. 1 , the present application provides a shear key installation structure. The shear key installation structure includes a column 1 , a column base plate 2 , a stud bolt 3 , a nut 4 , and a reserved hole for the shear key. 5. Foundation short column 6, shear key 7, support 8.

The column 1 can be cylindrical, for example, can be made of a square pipe column. The column base plate 2 is connected to the lower end of the column 1. The column 1 and the column base plate 2 can be fixedly connected by, for example, welding. The base plate 2 is provided with mounting holes 21 , which can be formed in the same or similar shape as the shear key 7 , for example, the shear key 7 is a cubic column, and the mounting hole 21 is a rectangular hole. The size of the installation hole 21 can be slightly larger than the size of the shear key 7, so that the shear key 7 can be inserted into the installation hole 21 within a certain position error range, for example, the side length of the installation hole 21 is longer than the corresponding side length of the shear key 7 4mm larger.

The foundation stub 6 may represent a pre-cast on site, or a concrete stub or reinforced concrete stub that has been pre-cast in the factory before the column 1 and the column base plate 2 are delivered to the site. The size of the foundation short column 6 is determined according to the dimensions of the column 1 and the base plate 2 of the column foot. For example, the size of the column 1 is 200×200mm, then the size of the foundation short column 6 can be 600×600mm. The foundation short column 6 is reserved with a reserved hole 5 for anti-shear keys, the size of the reserved hole 5 for the anti-shear key is larger than that of the anti-shear key 7, and the reserved hole 5 for the anti-shear key may be a rectangular hole.

The stud bolts 3 are pre-embedded in the foundation short column 6, the stud bolts 3 extend upward from the top surface of the foundation short column 6, the stud bolts 3 pass through the column foot bottom plate 2, and the column foot bottom plate 2 is connected to the column foot through the nut 4 Bolt 3.

The nut 4 includes upper and lower nuts of the stud bolt 3 , and the nut 4 is used to connect the stud base plate 2 to the stud bolt 3 . By rotating the lower nut, the column foot bottom plate 2 can be leveled and elevated. After the leveling and elevation are completed, the upper nut is tightened so that the column foot bottom plate 2 is fixedly connected to the stud bolt 3 .

The support 8 is located between the bottom of the shear key reserved hole 5 and the shear key 7 , the support 8 does not protrude from the opening of the shear key reserved hole 5 , and is used to support the shear key 7 . The area of the top surface of the support member 8 is smaller than that of the bottom surface of the shear key 7 so that the bottom surface of the shear key 7 is partially in contact with the support member 8 . A gap is left between the shear key 7 and the bottom of the prefabricated foundation short column 6 (with the shear key reserved hole 5 ) through the support 8 , and these gaps below the shear key 7 are filled with grouting material for secondary grouting. , the grout for the secondary grouting can fix the shear key 7 after curing. The grouting material can be filled under the shear key 7 through the support member 8, so as to avoid the direct contact between the shear key 7 and the prefabricated foundation short column 6 to form a gap. The support 8 may be a steel member.

There is space for secondary grouting between the bottom plate 2 of the column footing and the short foundation column 6. A represents the thickness of the second layer of grouting reserved between the bottom plate 2 of the column footing and the short foundation column 6 (the top surface of the foundation). less than 50mm. B represents the dimension of the support member 8 in the direction perpendicular to the base plate 2, and is, for example, 50 mm.

The present application also provides an installation method of a shear key used in the above-mentioned shear key installation structure, which may include the steps described below.

The foundation short column 6 is made, and the shear key reserved hole 5 is reserved in the foundation short column 6 , and the shear key reserved hole 5 is used to accommodate the shear key 7 .

Place the support 8 in the reserved hole 5 for the shear key.

The shear key 7 is placed in the reserved hole 5 for the shear key, the shear key 7 is pressed on the support 8 , and the shear key 7 protrudes from the top surface of the foundation short column 6 .

The modular building is hoisted to a predetermined position, the mounting holes 21 of the base plate 2 of the modular building are aligned with the shear key 7 , the height of the modular building is lowered, and the shear key 7 is inserted into the mounting hole 21 .

The column base plate 2 is supported by the lower nut of the nut 4. The level and elevation of the column base plate 2 are adjusted by the height of the lower nut of the nut 4. After adjusting in place, tighten the upper nut of the nut 4 to fix the column base plate 2.

Fill in the grouting material into the gap between the bottom plate 2 of the column foot and the top surface of the short column 6 and the reserved hole 5 for the shear key, and perform maintenance. After the grouting material is cured, the shear key 7 of the reserved hole 5 for the shear key is buried. be fixed.

While the application has been described with reference to exemplary embodiments, it is to be understood that the application is not limited to the disclosed exemplary embodiments. Those skilled in the art can make various modifications and changes to the above-mentioned embodiments under the teaching of the present application, without departing from the scope of the present application.

Claims (10)

1. An installation structure for a shear key, characterized in that it comprises a column (1), a column base plate (2), a stud bolt (3), a reserved hole for the shear key (5), a foundation short column ( 6), shear key (7); The column base plate (2) is fixedly connected to the column (1), the stud bolts (3) are pre-embedded in the foundation short column (6), and the column base plate (2) is connected to the The stud bolt (3), the shear key reserved hole (5) is formed in the foundation short column (6), the shear key (7) is accommodated in the shear key reserved hole (5) and Protruding from the opening of the reserved hole (5) for the anti-shear key, the bottom plate of the column foot (2) is provided with a mounting hole (21), and the anti-shear key (7) passes through the mounting hole (21) into the column (1). 2. The installation structure of the shear key according to claim 1, characterized in that, the installation structure further comprises a support member (8), and the support member (8) is arranged on the side of the shear key (7). Below, the shear key (7) is supported by the support (8). 3. The installation structure of the shear key according to claim 2, characterized in that, the area of the top surface of the support member (8) is smaller than the area of the bottom surface of the shear key (7), and the shear key The bottom surface of the key (7) is partially in contact with the support (8). 4. The installation structure of the shear key according to claim 1, characterized in that, the installation structure further comprises a nut (4), through which the column base plate (2) is connected to the The stud bolt (3), the nut (4) includes an upper nut and a lower nut, and the upper nut and the lower nut are respectively located on the upper and lower sides of the stud base plate (2). 5 . The installation structure of the shear key according to claim 1 , characterized in that there is a secondary grouting grouting material between the top surface of the short foundation column ( 6 ) and the bottom plate of the column foot ( 2 ). 6 . 6. The installation structure of the shear key according to claim 1, characterized in that the reserved hole (5) for the shear key has a grouting material for secondary grouting, and the shear key (7) is grouted by the secondary grouting. ) to the reserved hole (5) for the shear key. 7. The installation structure of the shear key according to any one of claims 1 to 6, wherein the shear key (7) is in the shape of a cubic column, and the installation hole (21) is a rectangular hole, so The reserved hole (5) for the shear key is a rectangular hole. 8. The installation structure of the shear key according to any one of claims 1 to 6, wherein the size of the installation hole (21) is larger than the size of the shear key (7). 9. An installation method of a shear key, characterized in that it is used to realize the shear key installation structure described in any one of claims 1 to 8, the shear key installation method comprising: When the shear key (7) is placed in the reserved hole (5) for the shear key at the installation site of the modular building, and the column base plate (2) is installed on the short foundation column (6) , insert the shear key (7) into the installation hole (21). 10. The installation method of the shear key according to claim 9, wherein, The short foundation column (6) is a concrete or reinforced concrete column prefabricated in a factory or pre-cast at the installation site, At the installation site of the modular building, the grouting material is poured into the reserved hole (5) of the shear key and the gap between the bottom plate of the column foot (2) and the top surface of the short foundation column (6), so that the The shear key (7) inserted into the shear key reserved hole (5) is fixed.

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