CN103696514A - T-frame component and lightweight concrete body fabricated shear wall and connection structure thereof - Google Patents

Abstract

T-shaped frame member lightweight concrete wall assembly shear wall and connection structure, belonging to the field of building construction technology, is a new type of assembly made of ordinary concrete prefabricated T-shaped frame members and lightweight concrete prefabricated walls Type shear wall, by setting concealed columns at each end and node of the T-shaped frame member, the lower part of the concealed column is pre-embedded with a steel frame and a part protrudes, and then the upper and lower sides are realized through the concealed column steel frame structure and vertical steel bars. Vertical connection of shear walls. The invention provides a novel assembled shear wall and its connection construction method, which has the advantages of continuous stress, reliable connection, light structure weight, low engineering cost, energy saving and heat preservation, and the like. In addition, the shear wall is supported during construction, which makes the construction more convenient and improves the construction efficiency.

Description

Prefabricated shear wall and connection structure of light weight concrete wall with T-shaped frame member

technical field

The invention relates to a prefabricated shear wall suitable for multi-storey or medium-high-rise buildings and its connection method. A type shear wall and its connecting structure belong to the technical field of prefabricated concrete shear wall structures in construction engineering.

Background technique

The traditional residential construction method in our country basically adopts the cast-in-place method, because this method is relatively mature in technology, but there are still many problems in the cast-in-place structural system. First, the construction conditions on site are poor; The waste of materials is serious; the third is limited by the site and climate conditions, the construction efficiency is low and the construction period is long; the fourth is that the on-site construction has a great impact on the surrounding environment. In contrast, the prefabricated shear wall structure is constructed in an industrialized way. Some or all of the components of the house are prefabricated in the factory, and then transported to the construction site. The components are assembled into one body through reliable connections. The advantages of short cycle, stable and reliable quality, environmental protection and energy saving can greatly relieve the pressure on the market.

However, the existing prefabricated shear wall structure is mainly used in high-rise buildings, the cost is high, the construction of the wall joint is complicated, and the construction quality is not easy to control. Prefabricated shear wall structure with energy saving and heat preservation and convenient connection is very necessary.

Contents of the invention

The object of the present invention is to provide a light-weight concrete wall with T-shaped frame members for multi-storey or medium-high-rise buildings, which has the advantages of continuous force, reliable connection, light structure weight, low engineering cost, energy saving and heat preservation, and high construction efficiency. The prefabricated shear wall and connection structure effectively solve the problems of high cost of cast-in-place concrete structures, serious waste of materials, complex construction, and low construction efficiency.

The technical scheme that the present invention adopts is as follows:

T-shaped frame member lightweight concrete wall prefabricated shear wall is mainly composed of ordinary concrete prefabricated T-shaped frame member and light concrete prefabricated wall inside the T-shaped frame member, wherein the T-shaped frame member is in three Four concealed columns are set at each end and node, and the concealed column is composed of four vertical steel bars and stirrups. The steel frame is pre-embedded in the lower part of the hidden column and a part protrudes, and the T-shaped frame member is provided with vertical steel bars and horizontal steel bars. The blanking channel for concrete pouring in the later stage is reserved in the T-shaped frame member. The T-shaped frame member adopts ordinary concrete above C30; Channels; lightweight concrete walls The lightweight concrete used includes foam concrete, fly ash concrete or recycled concrete.

The prefabricated shear wall structure is only suitable for multi-storey or medium-high-rise buildings with degrees below 7 degrees and 6 degrees, and the building height is not greater than 24m.

The length of the steel frame pre-embedded in the hidden column of the T-shaped frame member should not be less than 300mm, and the length extending out of the wall should be the same as the height of the post-casting strip.

The pre-embedded steel frame in the concealed column of the T-shaped frame member is an I-shaped steel frame or steel frame in other cross-sectional forms.

The length of the vertical reinforcement protruding from the upper and lower shear walls should be the same as the height of the post-casting belt, and not less than 200mm.

At least two blanking channels for later pouring concrete shall be reserved in each section of the shear wall, and the diameter of the channels shall not be less than 100mm.

The joint surface of the upper and lower shear walls should be provided with a rough surface, and the unevenness of the rough surface should not be less than 6mm.

The diameter of the hidden column stirrups at the connection of the upper and lower shear walls shall not be less than 8mm, and the spacing shall not be greater than 100mm.

When the wall is connected, the vertical steel bar and the steel frame are stretched out from a part of the wall body of the shear wall. Bind the vertical steel bars of the concealed column, and connect all the vertical steel bars of the shear wall by tying and lapping. When the strength level reaches 80%, the formwork is removed and the connection of the upper and lower shear walls is completed.

Ordinary concrete shall be poured at the junction of the upper and lower shear walls later, and the strength grade shall not be less than C30.

The beneficial effects of the present invention are:

1. The prefabricated shear wall made of T-shaped frame members and lightweight concrete walls can reduce the self-weight of the structure and reduce the cost of the project under the premise of meeting the bearing capacity, and the lightweight concrete walls can have good Insulation performance, with the advantages of energy saving and environmental protection.

2. By setting up concealed columns and connecting the vertical steel bars of the concealed columns with the steel skeleton structure, not only the reliability of the vertical connection of the wall is realized, but also the wall is supported during construction, and the construction is more convenient and fast, thus The construction efficiency is improved and the production cost is saved.

3. By inventing a prefabricated shear wall with a T-shaped frame member and a lightweight concrete wall and its connection structure, a prefabricated shear wall suitable for multi-storey or medium and high-rise buildings with energy saving, heat preservation and low cost is provided. Wall structure houses have great application prospects.

Description of drawings:

Figure 1 is a schematic diagram of the connection of a T-shaped frame member lightweight concrete wall assembly type shear wall;

Figure 2 is a perspective view of the upper shear wall;

Figure 3 is a plan view of the bottom surface of the upper shear wall;

Figure 4 is a perspective view of the lower shear wall;

Fig. 5 is the plan view of the top surface of the lower shear wall;

Figure 6 is a schematic diagram of the structural connection of the concealed column at the junction of the upper and lower shear walls;

In the picture:

1-upper shear wall; 2-lower shear wall; 3-T-shaped frame member; 4-light concrete wall; 5-concealed column; 6-vertical reinforcement; 7-horizontal reinforcement; 8-feeding channel ; 9-steel bone; 10-stirrup.

Detailed ways:

Below in conjunction with accompanying drawing and specific embodiment the present invention will be further described:

As shown in Figures 1 to 6, the T-shaped frame member lightweight concrete wall assembly shear wall and its connection structure are carried out as follows:

1. According to the design requirements of the building structure, determine the section size of the T-shaped frame member 3, the section size of the lightweight concrete wall 4, the diameter and spacing of the vertical reinforcement 6 and the horizontal reinforcement 7, and the diameter and spacing of the stirrup 10; and determine the steel frame 9 The specific cross-sectional size and pre-embedded length, the number and aperture size of the reserved cutting channels 8 in the shear wall, etc.;

2. Make the shear wall according to the design requirements: first, tie four vertical steel bars 6 with stirrups 10 at the positions of the four concealed columns of the T-shaped frame member 3 to form the concealed column 5, and fix the steel frame 9 at the lower part of the concealed column 5 Well, arrange all the vertical steel bars 6 and horizontal steel bars 7 of the shear wall, and pre-embed the steel sleeves, then first support the T-shaped frame member 3 with a formwork, pour ordinary concrete, and wait until the concrete strength grade reaches 80%. Remove the formwork; then support the lightweight concrete wall 4 with the formwork, pour foam concrete or other lightweight concrete, and remove the formwork after the concrete strength level reaches 80%, and then pull out the steel casing to form the feeding channel 8, so far , the shear wall is completed.

3. Connection of the upper and lower shear walls: After the lower shear wall 2 is fixed, the upper shear wall 1 is hoisted, and the steel frame 9 of the hidden column 5 of the T-shaped frame member 3 in the upper shear wall 1 is aligned with the lower shear wall. In the middle of the vertical reinforcement 6 of the hidden column 5 in the force wall 2, then slowly lower the upper shear wall 1, and after the steel frame 9 is inserted into the middle of the vertical reinforcement 6 to stabilize, use a hoop to connect the vertical reinforcement 6 of the hidden column 5 The tendons 10 are bound, and all the vertical steel bars 6 of the shear wall are connected by binding and lapping.

4. Concrete after pouring: form the supporting formwork around the connection to form a post-casting belt, pour concrete from the blanking channel 8 of the upper shear wall 1, and leave the corresponding blanking channel 8 as air holes. After the pouring is completed , after the concrete strength grade reaches 80%, the formwork is removed, so far, the vertical connection construction of the upper and lower shear walls is completed.

The above is a typical embodiment of the present invention, and the practice of the present invention is not limited thereto.

Claims (10)

1. T-shaped frame member lightweight concrete wall prefabricated shear wall is characterized in that: it is mainly composed of a T-shaped frame member prefabricated by ordinary concrete and a prefabricated light concrete wall located in the T-shaped frame member, wherein The T-shaped frame member is provided with four concealed columns at the three ends and joints. The concealed column is composed of four vertical steel bars and stirrups. Directional reinforcement and horizontal reinforcement, and the blanking channel for concrete pouring in the later stage is reserved in the T-shaped frame member, and the T-shaped frame member adopts ordinary concrete above C30; The blanking channel of the later pouring concrete; the lightweight concrete used in the lightweight concrete wall includes foam concrete, fly ash concrete or recycled concrete. 2. The prefabricated shear wall of lightweight concrete wall with T-shaped frame member according to claim 1, characterized in that: the prefabricated shear wall structure is only suitable for multi-layer or middle-rise buildings below 7 degrees and 6 degrees Buildings, the building height is not greater than 24m. 3. The T-shaped frame member lightweight concrete wall assembly type shear wall according to claim 1, characterized in that: the length of the steel frame in the hidden column of the T-shaped frame member embedded in the hidden column should not be less than 300mm , the length protruding from the wall should be the same as the height of the post-casting belt. 4. The T-shaped frame member lightweight concrete wall assembly type shear wall according to claim 1, characterized in that: the embedded steel frame in the concealed column of the T-shaped frame member is an I-shaped steel frame or other cross-sectional forms Steel frame. 5. The T-shaped frame member light weight concrete wall assembly type shear wall according to claim 1, characterized in that: the length of the vertical reinforcement protruding from the upper and lower shear walls should be the same as the height of the post-cast belt, and not less than 200mm. 6. The T-shaped frame member lightweight concrete wall assembly type shear wall according to claim 1, characterized in that: in each section of the shear wall, at least two blanking channels for post-concrete pouring should be reserved, and the channel diameter Not less than 100mm. 7. The T-shaped frame member lightweight concrete wall assembly type shear wall according to claim 1, characterized in that: a rough surface should be provided at the joint surface of the upper and lower shear walls, and the unevenness of the rough surface should not be less than 6mm. 8. The T-shaped frame member lightweight concrete wall assembly type shear wall connection structure according to claim 2, characterized in that: the diameter of the hidden column stirrup at the connection of the upper and lower shear walls is not less than 8mm, and the spacing is not greater than 100mm. 9. The connection structure of the T-shaped frame member lightweight concrete wall assembly type shear wall according to any one of claims 1 to 8, characterized in that: the wall is connected by vertical reinforcement and The steel frame protrudes from a part of the shear wall. When the upper and lower shear walls are connected, insert the protruding steel frame into the middle of the vertical reinforcement of the concealed column, tie the vertical reinforcement of the concealed column with stirrups, and tie the entire shear wall The vertical steel bars are connected by lashing and lapping. The joints of the upper and lower shear walls are supported by formwork to form a post-casting belt, and then concrete is poured through the unloading channel. When the concrete strength grade reaches 80%, the formwork is removed and the upper and lower shear walls The wall connection is complete. 10. The T-shaped frame member lightweight concrete wall assembly type shear wall connection structure according to claim 9, characterized in that ordinary concrete is poured at the joint of the upper and lower shear walls at a later stage, and the strength grade is not less than C30.

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