CN206873663U - The low damage slab-wall structure of full prefabricated PC - Google Patents

Abstract

The utility model discloses a fully assembled prestressed low-damage slab wall structure, which comprises prefabricated concrete walls and prefabricated concrete slabs alternately arranged up and down, and the prefabricated concrete walls and prefabricated concrete slabs are connected by prestressed steel rods to form a slab wall structure . The precast concrete wall and the precast concrete slab are positioned and connected by shear keys; the prestressed steel rod is composed of several short steel rods connected; The bottom of the stress steel rod is fixed to the foundation. After the overall stretching of the prestress steel rod is completed and the cement slurry is poured in the tunnel, the top of the prestress steel rod is tightened by tightening the tension nut to realize the fastening of the board wall structure and the tensile stress of the prestress steel rod. transmission. The panel wall structure of the utility model is a dry connection form, which has the advantages of convenient and fast installation, basically no wet work on site, high construction efficiency, small damage and residual deformation under earthquake action, and easy repair after earthquake.

Description

Fully assembled prestressed low-damage panel wall structure

technical field

The utility model relates to a fully assembled prestressed low-damage slab wall structure with the characteristics of convenient installation, small residual deformation under earthquake action, and easy repair, and belongs to the technical field of assembled concrete structures.

Background technique

At present, the structural forms of prefabricated concrete buildings widely used in engineering construction in China mainly include assembled integral frame structure and assembled integral shear wall structure.

Part of the beams and columns of the assembled integral frame structure are prefabricated components. After being hoisted in place, the steel bars at the joints are welded or bound, and connected as a whole by pouring and tamping concrete to form rigid joints. It has both cast-in-place frames and fabricated The advantage of the frame is that it not only has good integrity and earthquake resistance, but also can reduce the workload on site through prefabricated components.

Assembling the integral shear wall structure is by prefabricating the shear wall components in the factory. Connecting steel bars and vertical connection holes are reserved on the components. After on-site assembly, the prefabricated components are connected through cast-in-place connection nodes in the horizontal direction and through sleeves in the vertical direction. Or the way of slurry anchor connection, so that the components can be assembled into a whole, so as to achieve the purpose of being equivalent to cast-in-place.

However, from the actual construction, it can be found that the above two prefabricated concrete structures still have a lot of wet work during on-site construction, the construction speed is slow, the construction period is long, and the quality of the concrete structure is not easy to control, and the seismic performance is easily affected. , and the damage after the earthquake is not easy to repair.

Utility model content

The purpose of this utility model is to provide a fully-assembled prestressed low-damage board wall structure. The board wall structure is in the form of dry connection, which has the advantages of convenient and fast installation, basically no wet work on site, high construction efficiency, and no damage caused by earthquakes. It has the advantages of small residual deformation and easy repair after earthquake.

In order to achieve the above object, the utility model adopts the following technical solutions:

A fully assembled prestressed low-damage slab wall structure, characterized in that it includes prefabricated concrete walls and prefabricated concrete slabs alternately arranged up and down, and the prefabricated concrete walls and prefabricated concrete slabs are fixedly connected by prestressed steel rods penetrating up and down Together they form a slab wall structure, in which: the precast concrete wall and the precast concrete slab are positioned and firmly connected with each other through shear keys; the prestressed steel rods are composed of several short steel rods connected; the prestressed steel rods run through the In the channel reserved on the body and the precast concrete slab, the bottom of the prestressed steel rod is fixed to the foundation. After the overall tensioning of the prestressed steel rod is completed and the cement slurry is poured in the channel, the top of the prestressed steel rod protrudes upwards for the slab wall structure. The fastening of the panel wall structure and the transmission of the tensile stress of the prestressed steel rods are realized by tightening the tension nuts.

The short steel rods adjacent up and down are connected by steel rod connectors.

After the prestressed steel rods are stretched, the precast concrete wall and the precast concrete slab are subjected to slow bonding or non-bonding treatment, and the port of the tunnel is sealed.

The utility model has the advantages of:

The slab wall structure of the utility model is an assembled concrete structure, which adopts a dry connection form. It is mainly connected by prefabricated concrete walls and prefabricated concrete slabs by applying vertical prestressed steel rods. It has energy saving and environmental protection, and the quality of prefabricated components is easy Control and installation are convenient and fast, there is basically no wet work on site (wet work is only for tunnel cement slurry grouting), high construction efficiency, etc., and the overall performance of the board wall structure of the utility model is good, and the overall deformation control effect of the board wall structure is good , the damage and residual deformation of the slab wall structure are small under the action of the earthquake, and it is easy to repair after the earthquake. It is a new type of prefabricated concrete structure that is suitable and worthy of promotion. It can effectively enrich and improve the structure of prefabricated concrete buildings in my country. .

Description of drawings

Fig. 1 is a schematic diagram of a fully assembled prestressed low-damage panel wall structure of the present invention.

Fig. 2 is a sectional view taken along line A-A of Fig. 1 .

Fig. 3 is a sectional view taken along line B-B of Fig. 1 .

Figure 4 is a schematic diagram of the installation of the top of the prestressed steel rod.

detailed description

As shown in Figures 1 to 4, the fully assembled prestressed low-damage slab wall structure of the present invention includes precast concrete walls 1 and precast concrete slabs 2 arranged alternately up and down, and the precast concrete walls 1 and precast concrete slabs 2 pass through the upper and lower The penetrating prestressed steel rods 4 are reliably and fixedly connected together to form a slab wall structure, wherein: the precast concrete wall 1 and the precast concrete slab 2 are positioned and firmly connected with each other through the shear key 5; the prestressed steel rods 4 It is composed of several short steel rods connected; the prestressed steel rods 4 run through the channels 3 reserved on the precast concrete wall 1 and the precast concrete slab 2, and the bottom of the slab wall structure is usually the precast concrete wall fixed to the foundation 1. The bottom of the prestressed steel rod 4 protruding downward from the panel wall structure is fixed to the foundation (not shown in the figure). The top of the prestressed steel rod 4 of the panel wall structure is fastened by tightening the tension nut 7 to realize the fastening of the panel wall structure and the transmission of the tensile stress of the prestressed steel rod 4 .

In the actual design, the upper and lower adjacent short steel rods are connected by the steel rod connector 6, and the steel rod connector 6 can realize reliable connection and force transmission between the short steel rods. In the actual design, the length of the short steel rod is roughly the height of a storey. In the present invention, except for the bottom precast concrete wall 1, the heights of a precast concrete slab 2 and a precast concrete wall 1 are regarded as the height of a floor.

In actual production, the two ends of the short steel rod are provided with threads, and the short steel rod is screwed with the steel rod connector 6. Of course, the connection mode between the short steel rod and the steel rod connector 6 is not limited to the screw connection, and can also be other connection methods.

In the utility model, the short steel rods are made of prestressed steel rods with high strength, low relaxation, good fatigue performance and strong self-recovery ability. The ultimate tensile strength of the prestressed steel rods can reach more than 2.5 times that of ordinary steel bars. By stretching the prestressed steel rods 4 in the prefabricated concrete wall 1 and the precast concrete slab 2, the recoverable performance of the structure after the earthquake can be ensured, and the cracking of the concrete components can be effectively controlled, and the slab wall structure can be reduced. Residual deformation under earthquake action.

In actual implementation, at least two prestressed steel rods 4 are arranged on the board wall structure, and all the prestressed steel rods 4 are preferably arranged in a row, that is, arranged in a single row, and preferably, the prestressed steel rods 4 are arranged on the board wall The thickness direction of the structure is in the middle (as shown in Figure 3), and the horizontal distance D1 between two adjacent prestressed steel rods 4 is not greater than 1500mm. The distance D2 between the stress steel rod 4 and the side of the panel wall structure is not less than 100 mm, as shown in FIG. 1 .

In actual design, the hole diameter of the channel 3 is not less than 40mm. As shown in Fig. 1, the height H1 of the shear key 5 is not less than 20 mm.

The channel 3 can be formed by a built-in PVC corrugated pipe or drawn out by a drawing rod.

In actual implementation, preferably, after the prestressed steel rod 4 is stretched, the precast concrete wall 1 and the precast concrete slab 2 are treated with slow bonding or no bonding, and the port of the tunnel 3 is sealed.

As shown in Figure 4, an anchor plate 8 is provided between the tension nut 7 and the wall structure, that is, the anchor plate 8 is set on the top of the prestressed steel rod 4, and the wall structure is fastened by the tension nut 7.

In addition, the contact surface between the precast concrete wall body 1 and the precast concrete slab 2 should be roughened. The shear keys 5 provided on the lower surface of the precast concrete wall 1 and the precast concrete slab 2 are respectively placed on the corresponding positions of the precast concrete slab 2 and the upper surface of the precast concrete wall 1, so as to achieve the 2 between the quick positioning and firm connection.

In the present invention, the setting of the shear key 5 can facilitate the rapid and stable positioning of the prefabricated components during the installation process, and can effectively increase the seismic strength of the panel wall structure. Usually, the shear key is set at the tunnel 3 , that is, the tunnel 3 runs through the shear key 5 .

The slab wall structure of the utility model is an assembled concrete structure, which adopts a dry connection form. It is mainly connected by precast concrete walls 1 and prefabricated concrete panels 2 by applying vertical prestressed steel rods 4. It has energy saving, environmental protection, prefabricated The quality of the components is easy to control, the installation is convenient and fast, there is basically no wet work on site (the wet work is only the cement slurry grouting construction of the tunnel), and the construction efficiency is high. In addition, the overall performance of the board wall structure of the utility model is good, and the overall deformation of the board wall structure The control effect is good, the damage and residual deformation of the slab wall structure are small under the action of the earthquake, and it is easy to repair after the earthquake. It is a new type of prefabricated concrete structure suitable for and worthy of promotion, which can effectively enrich and improve my country's prefabricated concrete structure. Concrete building structure.

The construction method of the fully assembled prestressed low-damage board wall structure of the utility model includes steps:

1) The prefabricated concrete wall 1 and the precast concrete slab 2 (both are prefabricated components) are manufactured, cured and formed and the tunnel 3 is reserved;

2) Install the short steel rod in place on the foundation according to the measuring and setting-out position;

3) Put the bottom prefabricated concrete wall 1 through the short steel rod and fix it with the foundation;

4) Connect other short steel rods through the steel rod connector 6 to extend the prestressed steel rod 4 upwards;

5) Continue to penetrate the precast concrete slab 2 and the precast concrete wall 1 on the extended prestressed steel rod part, wherein the fast positioning and stable fixing are realized through the shear key 5 between the precast concrete wall 1 and the precast concrete slab 2 ;

6) Repeat 4)-5) until all prefabricated components (precast concrete wall 1 and precast concrete slab 2) are installed;

7) The prestressed steel rod 4 is stretched by the prestressed equipment. After the cement slurry 9 is poured in the tunnel 3, the top of the prestressed steel rod 4 protruding upward from the slab wall structure is realized by tightening the tension nut 7 to realize the slab wall structure. Fasten;

8) performing a tensioning operation on the prestressed steel rod 4, so that the tensile stress of the prestressed steel rod 4 is effectively transferred to the prefabricated component;

9) The precast concrete wall 1 and the precast concrete slab 2 are treated with slow bonding or no bonding;

10) The port of channel 3 is sealed.

In actual construction, the length extended by the prestressed steel rods 4 each time by connecting the short steel rods is usually set to the height of a floor, so that the precast concrete wall 1 and the precast concrete slab 2 can be installed layer by layer to facilitate construction. .

The above are the preferred embodiments of the utility model and the technical principles used therefor. For those skilled in the art, without departing from the spirit and scope of the utility model, any technical solution based on the utility model Obvious changes such as equivalent transformations and simple replacements above all fall within the protection scope of the present utility model.

Claims (9)

1. A fully assembled prestressed low-damage slab wall structure is characterized in that: it comprises prefabricated concrete walls and prefabricated concrete slabs alternately arranged up and down, and prefabricated concrete walls and prefabricated concrete slabs pass through prestressed steel rods up and down Fixedly connected together to form a slab wall structure, in which: the precast concrete wall and the precast concrete slab are positioned and firmly connected by shear keys; the prestressed steel rods are composed of several short steel rods connected; the prestressed steel rods run through the In the channel reserved for the concrete wall and the precast concrete slab, the bottom of the prestressed steel rod is fixed to the foundation. The fastening of the panel wall structure and the transmission of the tensile stress of the prestressed steel rods are realized by tightening the tension nuts at the top of the rods. 2. The fully assembled prestressed low-damage panel wall structure according to claim 1, characterized in that: The short steel rods adjacent up and down are connected by steel rod connectors. 3. The fully assembled prestressed low-damage panel wall structure according to claim 1, characterized in that: At least two prestressed steel rods are arranged on the board wall structure, all the prestressed steel rods are arranged in a row, and the horizontal distance between two adjacent prestressed steel rods is not greater than 1500mm, and the most The distance between one of the prestressed steel rods on the outside and the side of the panel wall structure is not less than 100mm. 4. The fully assembled prestressed low-damage panel wall structure according to claim 1, characterized in that: The hole diameter of the channel is not less than 40mm. 5. The fully assembled prestressed low-damage panel wall structure according to claim 1, characterized in that: The channel is formed by a built-in PVC corrugated pipe or drawn out by a drawing rod. 6. The fully assembled prestressed low-damage panel wall structure according to claim 1, characterized in that: After the prestressed steel rods are stretched, the precast concrete wall and the precast concrete slab are subjected to slow bonding or non-bonding treatment, and the port of the tunnel is sealed. 7. The fully assembled prestressed low-damage panel wall structure according to claim 6, characterized in that: An anchor pad is provided between the tension nut and the wall structure. 8. The fully assembled prestressed low-damage panel wall structure according to claim 1, characterized in that: The contact surface between the precast concrete wall and the precast concrete slab is made into a rough surface; the precast concrete wall and the shear keys provided on the lower surface of the precast concrete slab are respectively placed on the precast concrete slab 1. On the corresponding position on the upper surface of the precast concrete wall, so as to achieve rapid positioning and stable connection between the precast concrete wall and the precast concrete slab. 9. The fully assembled prestressed low-damage panel wall structure according to claim 1 or 8, characterized in that: The height of the shear key is not less than 20mm.