CN103711232B - L-shaped frame component and lightweight concrete wall prefabricated type shear wall and connection construction method - Google Patents

Abstract

L-shaped frame member lightweight concrete wall prefabricated shear wall and connection structure, belonging to the field of building construction technology, is a new type of assembly made of ordinary concrete prefabricated L-shaped frame members and lightweight concrete prefabricated walls Type shear wall, by setting concealed columns at each end and node of the L-shaped frame member, the lower part of the concealed column pre-embeds the steel frame and protrudes a part, and then realizes the up and down through the concealed column steel frame structure and vertical steel bar binding and lapping. 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. In addition, when the shear wall is supported during construction, the construction is more convenient and the construction efficiency is improved.

Description

L-shaped frame member lightweight concrete wall prefabricated shear wall and connection structure

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 lightweight concrete wall with L-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:

L-shaped frame member lightweight concrete wall prefabricated shear wall is mainly composed of ordinary concrete prefabricated L-shaped frame member and light concrete prefabricated wall inside the L-shaped frame member, wherein the L-shaped frame member is in two Three 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 L-shaped frame member is provided with vertical steel bars and horizontal steel bars. The L-shaped frame member is reserved for the blanking channel of the later pouring concrete, and the L-shaped frame member is made of ordinary concrete above C30; the lightweight concrete wall is provided with vertical and horizontal steel bars, and the wall is also reserved for the blanking of the later pouring concrete 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 L-shaped frame member should not be less than 300mm, and the length of the protruding wall should be the same as the height of the post-casting strip.

The pre-embedded steel frame in the concealed column of the L-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 L-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 an L-shaped frame member and a lightweight concrete wall assembled shear 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:

Fig. 1 is the schematic diagram of the connection of L-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-L-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 description:

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

As shown in Figure 1 to Figure 6, the L-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 L-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 three concealed columns of the L-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 L-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 in the concealed column 5 of the L-shaped frame member 3 in the upper shear wall 1 is aligned with the lower In the middle of the vertical reinforcement 6 of the concealed column 5 in the shear wall 2, slowly put down the upper shear wall 1, and after the steel skeleton 9 is inserted into the middle of the vertical reinforcement 6 to be stable, use the vertical reinforcement 6 of the concealed column 5 at the joint The hoops 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 (6)

1.L shape edge frame member lightweight concrete body of wall fabricated shear wall it is characterised in that：Main prefabricated by normal concrete L-shaped frame component and being made up of the body of wall of lightweight precast concrete in L-shaped frame component, wherein L-shaped frame component exists At two ends and node, three sleeper are set, sleeper is made up of four vertical reinforcements and stirrup, in the pre-buried reinforcing bar in sleeper bottom And stretching out a part, L-shaped frame component setting vertical reinforcement and horizontal reinforcement, in L-shaped frame component, the reserved later stage pours coagulation The blanking channel of soil, L-shaped frame component adopts the normal concrete of more than C30；Lightweight concrete body of wall setting vertical reinforcement and Horizontal reinforcement, the blanking channel of the equally reserved later stage casting concrete of lightweight concrete body of wall；Lightweight concrete body of wall adopts Lightweight concrete includes foam concrete, flyash concrete or regeneration concrete；

This fabricated shear wall structure is only applicable to 7 degree and following multilayer or middle-high building, and building height is not more than 24m；

The length that reinforcing bar in L-shaped frame component sleeper is embedded in sleeper should be not less than 300mm, stretches out fabricated shear wall long Degree should be highly identical with post-cast strip；

In L-shaped frame component sleeper, pre-buried reinforcing bar is I-shaped steel and steel bone or the reinforcing bar of other section form；

The vertical reinforcement length that shear wall stretches out up and down should be highly identical with post-cast strip, and is not less than 200mm.

2. L-shaped frame component lightweight concrete body of wall fabricated shear wall according to claim 1 it is characterised in that：Often The blanking channel of two later stage casting concretes should at least be reserved, channel diameter is not less than 100mm in section shear wall.

3. L-shaped frame component lightweight concrete body of wall fabricated shear wall according to claim 1 it is characterised in that：On At lower shear wall faying face, matsurface should be set, matsurface is concavo-convex to be no less than 6mm.

4. L-shaped frame component lightweight concrete body of wall fabricated shear wall according to claim 1 it is characterised in that：On Lower shear wall junction sleeper stirrup diameter is not less than 8mm, and spacing is not more than 100mm.

5. the L-shaped frame component lightweight concrete body of wall assembled shearing according to Claims 1-4 any claim Wall it is characterised in that：Described lightweight concrete body of wall is when connecting by vertical reinforcement and reinforcing bar are stretched out shear wall body one Part, when upper and lower shear wall connects, the reinforcing bar stretching out is inserted in the middle of sleeper vertical reinforcement, with stirrup sleeper vertical reinforcement Colligation, and whole for shear wall vertical reinforcements are adopted colligation overlapping mode to connect, upper and lower shear wall junction template is propped up, Form post-cast strip, then pass through blanking channel casting concrete, when strength grade of concrete reaches 80%, form removal, on Lower shear wall connection completes.

6. L-shaped frame component lightweight concrete body of wall fabricated shear wall according to claim 5 it is characterised in that：On The lower shear wall junction later stage will pour normal concrete, and strength grade is not less than C30.