CN204059601U - Steel bar connecting structure of prefabricated concrete member - Google Patents

Abstract

The utility model discloses a steel bar connection structure of prefabricated concrete components, which is characterized in that the connecting bars arranged in the connecting area between two prefabricated parts are bent by straight bars to form a "U" shape. At least one end of the "U"-shaped rib is embedded in the prefabricated part to form a "U"-shaped connecting rib extending at the end of the prefabricated part. The "U"-shaped connecting ribs extending from the two prefabricated parts are staggered Arrange and overlap each other to form each rectangular frame at the same longitudinal position, between each rectangular frame and at the four corners of the rectangular frame, connect in series with vertical straight bars to form a rectangular reinforcement cage. The utility model can be widely used in prefabricated floor slab components and prefabricated shear wall connecting components, and can replace existing laminated slabs with integral floor slabs. The types of prefabricated components are conducive to the realization of industrial production.

Description

A steel bar connection structure of prefabricated concrete components

technical field

The utility model relates to a steel bar connection structure of prefabricated concrete components, more specifically a connection structure applied between prefabricated concrete components in prefabricated assembled buildings.

Background technique

At present, in my country's prefabricated shear wall residences, a conventional way of connecting the steel bars of precast concrete shear wall components is "plug-in reserved hole grouting steel bar connection lap joint", which is the lower end of the pre-embedded steel bars in precast concrete components. A hole with a rough surface such as corrugated or spiral is reserved on the inner wall. After the precast concrete member is installed, the overlapping steel bar is inserted into the hole at the same time to the set lap length, and passes through the grouting hole and the vent hole connected to the hole. The grouting material is poured into the hole, and the connection of the steel bar is realized after the grouting material solidifies and hardens. There are mainly the following problems in this steel bar connection method:

1. The form of the plug-in reserved hole requires accurate positioning of the on-site steel bars without deviation, otherwise it is difficult to insert the steel bars into the reserved holes accurately. Before hoisting, manual correction must be carried out, but the correction process not only increases the workload, but also may damage the steel bars due to the correction, thereby affecting the performance of the steel bars.

2. The reserved hole is a closed hole throughout the whole process, and the structure inside the hole cannot be seen by the naked eye. During the whole process of pouring grouting material into the hole, it is impossible to judge whether the grouting material is tightly filling the entire hole, which makes the steel bar and prefabricated Whether the connection of the components is reliable is uncontrollable, and in the cast-in-place structure, the concrete needs to be vibrated with a vibrating device, but in this way, there is no vibration process, which makes the grout dense and uncontrollable.

3. The connection of the longitudinal reinforcement requires that the length of the reinforcement inserted into the hole should reach a depth not less than 30 times the diameter of the reinforcement, and the spiral stirrups should be arranged around the hole, and the height of the spiral stirrups should not be less than the lap length of the tensile reinforcement. It is obviously not conducive to the saving of steel bars.

In the prior art, in the construction of the laminated slab connection method for the floor of the prefabricated shear wall building, the laminated floor is a reinforced concrete floor composed of a prefabricated floor and a cast-in-place reinforced concrete layer. This form is mainly There are the following problems:

1. According to the relevant regulations, the thickness of the prefabricated components in the laminated floor should not be less than 50mm, and the thickness of the cast-in-place part should not be less than 100mm, that is, the overall thickness of the floor should not be less than 150mm, but the thickness of the floor in the cast-in-place structure is generally only 100mm -120mm. Obviously, the thickness of the laminated slab is 50%-25% higher than that of the cast-in-place slab. This form greatly increases the weight of the structure.

2. The pre-embedded lattice steel bars in the prefabricated floor components will greatly increase the overall amount of steel bars compared with ordinary cast-in-place floor slabs.

3. The laminated floor slab needs to carry out steel bar binding and concrete pouring on site, and a large amount of labor is required on site during the construction process, which is not conducive to improving engineering efficiency.

To sum up, in the prior art, there are mainly the following problems in the connection method of prefabricated shear wall reinforcement and the form of laminated floor slabs:

1. The grouting construction quality of the "plug-in reserved hole" is not easy to control and the inaccurate positioning of the reserved steel bars affects the reliability of the project.

2. The laminated floor structure is self-heavy and wastes concrete. The proportion of prefabricated components is only 50%, and the proportion of wet work is relatively large.

3. The plug-in reserved hole grouting reinforcement connection lap connection and the lattice reinforcement connection method of the laminated floor are two completely different connection methods and are not universal.

Utility model content

The utility model is to avoid the disadvantages of the above-mentioned prior art, and provide a safe and reliable prefabricated concrete component steel bar connection structure, so that the building structure can fully meet the structural bearing capacity, strong seismic integrity, and convenient construction. In order to meet the requirements of transportation and rapid realization of industrialized production, it is applied to prefabricated shear wall houses in order to reduce the number of wet operations, increase the proportion of assembly, simplify the construction process, and reduce the cost of the project.

The utility model adopts following technical scheme for solving technical problems:

The utility model prefabricated concrete member's steel bar connection structure is characterized in that: the connecting bar arranged in the connecting area between two prefabricated parts is a "U" shaped bar bent into a "U" shape by a straight bar, and the said At least one end of the "U"-shaped rib is pre-embedded in the prefabricated part to form a "U"-shaped connecting rib extending at the end of the prefabricated part. The "U"-shaped connecting ribs extending from the two prefabricated parts are arranged alternately Overlap each other to form rectangular frames at the same longitudinal position, between the rectangular frames and at the four corners of the rectangular frames, connect in series with vertical straight bars to form a rectangular reinforcement cage.

The characteristics of the steel bar connection structure of the prefabricated concrete member of the present invention also lie in:

Both ends of the "U"-shaped connecting rib extending at the end of the prefabricated part are pre-embedded in the prefabricated part to form a closed "U"-shaped connecting rib.

The "U"-shaped connecting rib extending at the end of the prefabricated part is pre-embedded in the prefabricated part at a single end to form an open "U"-shaped connecting rib, and the opening position of a pair of overlapping "U"-shaped connecting ribs on the contrary.

The utility model of prefabricated concrete member steel bar connection structure applied in the prefabricated floor member is characterized in that: in-situ concrete is cast in the connection area, and the connection is completed after vibration and maintenance to form an integral floor slab that can replace the laminated floor slab.

The utility model prefabricated concrete component reinforcement connection structure applied in the prefabricated floor components also has the following characteristics:

Divide a large-area slab into small-area unit slabs, and form a connection area between adjacent unit slabs.

The end face of the prefabricated floor member facing the connection area is set as a concave-convex surface, so that the prefabricated floor member and the cast-in-place concrete in the connection area are matched with a concave-convex surface, and the contact between the cast-in-place concrete in the connection area and the prefabricated floor member is increased. area.

The utility model of the prefabricated concrete member steel connection structure applied in the prefabricated shear wall connection member is characterized by: including the prefabricated shear wall vertical connection member and the prefabricated shear wall horizontal connection member, pouring concrete in the connection area after vibration Conservation completes the connection.

The utility model prefabricated concrete member steel connection structure application in the prefabricated shear wall connection member also has the following characteristics:

Divide the "L", "C" or "T" shaped shear wall into "one"-shaped prefabricated components, and form a connection area between the "one"-shaped prefabricated components; or divide the "C" Divide the "T" shaped shear wall into two "L" shaped prefabricated components and form a connection area between them; or divide the "T" shaped shear wall into a "T" shaped prefabricated component and a "one" Glyph prefabricated components, and form connection areas between each other.

The end face of the prefabricated shear wall connecting member facing the connecting area is set to be a concave-convex surface, so that the concavo-convex surface is matched between the prefabricated shear wall connecting member and the cast-in-place concrete in the connecting area, and the cast-in-place concrete in the connecting area is increased. The contact area of the end faces of the connecting members of the precast shear wall.

Compared with the prior art, the beneficial effects of the utility model are reflected in:

1. In the utility model, "U"-shaped bars are used to overlap to form a rectangular steel cage. Its structure is stable, and the connection area can obtain the same component bearing capacity as the cast-in-place process when it is compacted with concrete pouring.

2. The width of the connection area in the utility model can reach 250mm, which ensures the operating space of the construction personnel. Since the connection area is exposed, the concrete pouring can be vibrated with a vibrator and controlled by manual observation. The construction quality of cast-in-place concrete can be well controlled, and the overall performance of the node connection area can be guaranteed; the "U"-shaped bar lap joint in the utility model can reduce the length of the straight section of the steel bar lap joint by about 20%.

3. Since the utility model has the same component bearing capacity as the cast-in-place process in the connection area, it can be applied in various assembly structures, including the connection of floor prefabricated components and the connection of shear wall prefabricated components. , the connection of prefabricated shear wall components includes: vertical reinforcement connection between shear wall floors, segmental connection of longer shear walls in the same floor, and connection between shear wall components in different directions at corners, etc. Form; effectively reducing the types of prefabricated components, which greatly facilitates modular design.

4. Utilizing the connection method of the utility model, the shear walls of irregular shapes, such as "L", "C" and "T" shear walls can be divided into "one" shapes with the same specifications, and "one" The form of mass production; or the "C" shape shear wall is divided into two "L" shape combination, and the "T" shape shear wall is divided into the division "T" and "one" shape combination, and also Large-area floor slabs can be divided into several small pieces according to construction requirements, which greatly facilitates transportation and hoisting, can significantly reduce the types of prefabricated components produced in factories, and facilitate on-site construction.

5. Utilizing the connection structure of the utility model can greatly increase the proportion of prefabricated components and significantly reduce the number of wet operations. Especially in the application of floor prefabricated components, the form of superimposed floors can be abandoned, and the whole prefabricated floor can be used instead, so that the floor can be 100% prefabricated. This is of great significance for increasing the prefabrication ratio of prefabricated systems.

6. The connection method of the utility model overcomes the shortcomings of other connection methods such as uncontrollable construction quality, complex node connection areas, high construction costs, a large number of wet operations on site, and long construction waiting periods.

7. The universal connection mode in the utility model reduces the difficulty for workers to master the technology, and is of great help to improve the work efficiency and technical proficiency of workers.

Description of drawings

Figure 1a is a schematic diagram of the exploded section of the utility model applied to the horizontal connecting member of the prefabricated shear wall;

Figure 1b is a schematic diagram of the connection section of the utility model applied to the horizontal connection member of the prefabricated shear wall;

Fig. 1c is an exploded axonometric schematic diagram of the utility model applied to the horizontal connecting member of the prefabricated shear wall;

Figure 1d is a schematic diagram of the connection of the utility model applied to the horizontal connection member of the prefabricated shear wall;

Fig. 2a is the exploded cross-sectional schematic diagram of the utility model applied to the vertical connecting member of the prefabricated shear wall;

Figure 2b is a schematic diagram of the connection section of the utility model applied to the vertical connection member of the prefabricated shear wall;

Fig. 2c is an exploded axonometric schematic diagram of the utility model applied to the vertical connection member of the prefabricated shear wall;

Figure 2d is a schematic diagram of the connection axonometric view of the utility model applied to the vertical connection member of the prefabricated shear wall;

Figure 3a is a schematic diagram of the exploded section of the utility model applied to the horizontal connection member of the corner prefabricated shear wall;

Figure 3b is a schematic diagram of the connection section of the utility model applied to the horizontal connection member of the corner prefabricated shear wall;

Figure 3c is a schematic diagram of the exploded axonometric view of the utility model applied to the horizontal connection member of the corner prefabricated shear wall;

Fig. 3d is a schematic diagram of the connection axonometric view of the utility model applied to the horizontal connection member of the corner prefabricated shear wall;

Fig. 4a is a schematic diagram of the exploded section of the utility model applied to prefabricated floor components;

Figure 4b is a schematic diagram of the connection section of the utility model applied to prefabricated floor components;

Figure 4c is a schematic diagram of the exploded axonometric view of the utility model applied to prefabricated floor components;

Fig. 4d is an axonometric schematic diagram of the utility model applied to the connection of prefabricated floor components;

Labels in the figure: 11 the first horizontal connection member of the prefabricated shear wall, 12 the first horizontal connection bar, 21 the second horizontal connection member of the prefabricated shear wall, 22 the second horizontal connection bar, 31 the vertical connection of the first prefabricated shear wall Components, 32 the first vertical connecting bar, 41 the second prefabricated shear wall vertical connecting member, 42 the second vertical connecting bar; 51 the first corner prefabricated shear wall horizontal connecting member, 52 the first corner horizontal connecting bar, 61 Second corner prefabricated shear wall horizontal connecting member, 62 Second corner horizontal connecting rib; 71 First floor prefabricated component, 72 First floor connecting rib, 81 Second floor prefabricated component, 82 Second floor connecting rib, 9 Longitudinal Straight bars, 10 connecting areas;

Detailed ways

The steel bar connecting structure of the prefabricated concrete member of the utility model is: the connecting bar arranged in the connecting area between two prefabricated parts is a "U" shaped bar bent into a "U" shape by a straight bar, and the "U" bar At least one end of the "shaped rib is embedded in the prefabricated part to form a "U"-shaped connecting rib extending at the end of the prefabricated part. The "U"-shaped connecting ribs extending from the two prefabricated parts are arranged alternately and overlap Then, each rectangular frame at the same longitudinal position is formed, between the rectangular frames and at the four corners of the rectangular frame, the longitudinal straight bars are connected in series to form a rectangular reinforcement cage.

In a specific implementation, both ends of the "U"-shaped connecting rib extending at the end of the prefabricated part are pre-embedded in the prefabricated part to form a closed "U"-shaped connecting rib. The "U"-shaped connecting rib extending at the end of the prefabricated part can also be pre-embedded in the prefabricated part at a single end to form an open "U"-shaped connecting rib. The opening position of a pair of overlapping "U"-shaped connecting ribs on the contrary.

Application method:

Application method 1: The steel bar connection method of prefabricated concrete components in this embodiment is applied to prefabricated floor components, and concrete is cast in the connection area, and the connection is completed after vibration and maintenance to form an integral floor that can replace the laminated floor.

In specific implementation, the large-area floor can be divided into small-area unit floors, and a connection zone is formed between adjacent unit floors; the end face of the prefabricated floor component facing the connection zone is set as a concave-convex surface, so that the prefabricated floor component and The concavo-convex surfaces match the cast-in-place concrete in the connection area to increase the contact area between the cast-in-place concrete in the join area and the prefabricated floor slab.

Application mode 2: In this embodiment, the steel bar connection method of prefabricated concrete components is applied to the prefabricated shear wall connection components, including the vertical connection components of the prefabricated shear wall and the horizontal connection components of the prefabricated shear wall. Concrete is poured in the connection area and vibrated After maintenance, the connection is completed.

In specific implementation, the "L" shaped, "C" shaped or "T" shaped shear wall can be divided into "one" shaped prefabricated components, and a connecting area is formed between the "one" shaped prefabricated components; or Divide the "C"-shaped shear wall into two pieces of "L"-shaped prefabricated components, and form a connection area between them; it is also possible to divide the "T"-shaped shear wall into a piece of "T"-shaped The prefabricated components and a piece of "one"-shaped prefabricated components form a connection area between each other.

The end face of the prefabricated shear wall connecting member facing the connecting area is set to be a concave-convex surface, so that the concavo-convex surface is matched between the prefabricated shear wall connecting member and the cast-in-place concrete in the connecting area, and the cast-in-place concrete in the connecting area is increased. The contact area of the end faces of the connecting members of the precast shear wall.

The utility model can be widely used in two shear wall prefabricated components on the upper and lower floors, segmental prefabricated components of longer shear walls in the same floor, several pieces of shear wall prefabricated components in the corners of the same floor, and two floor slabs. The connection between prefabricated components can greatly simplify the connection types of component nodes, which is conducive to improving the degree of factory flow.

construction process:

1. Two prefabricated components are hoisted in place on site and temporarily supported;

2. Insert straight bars into each rectangular frame in the connection area as connecting steel bars, and tie them firmly with iron wires to form a fixed structure;

3. Pour the concrete in the connection area, and connect the components to form a whole by means of wet connection.

Referring to Fig. 1a, Fig. 1b, Fig. 1c and Fig. 1d, the horizontal connection is performed between the first prefabricated shear wall horizontal connecting member 11 and the second prefabricated shear wall horizontal connecting member 21, the first prefabricated shear wall horizontal connecting member 11 The first horizontal connecting bar 12 located in the connecting area is a "U"-shaped bar, and the second horizontal connecting bar 22 of the second prefabricated shear wall horizontal connecting member 21 located in the connecting area is also a "U"-shaped bar, As shown in Figure 1a and Figure 1c; in the connection area 10, the first horizontal connecting rib 12 and the second horizontal connecting rib 22 overlap each other to form a rectangular frame, and are located at the four corners of the rectangular frame in series with vertical straight ribs 9 For connection, as shown in Fig. 1b and Fig. 1d, the concrete pouring of the connection area 10 is carried out after the connection of the longitudinal straight bars 9 is completed.

Referring to Fig. 2a, Fig. 2b, Fig. 2c and Fig. 2d, the vertical connection is performed between the first prefabricated shear wall vertical connection member 31 and the second prefabricated shear wall vertical connection member 41, the first prefabricated shear wall The first vertical connecting bar 32 of the vertical connecting member 31 located in the connecting area is a "U" shaped bar, and the same is the second vertical connecting bar 42 of the second prefabricated shear wall vertical connecting member 41 located in the connecting area It is also a "U"-shaped rib, as shown in Figure 2a and Figure 2c; in the connection area 10, the first vertical connecting rib 32 and the second vertical connecting rib 42 are overlapped to form a rectangular frame, located at the four corners of the rectangular frame The positions are connected in series with longitudinal straight bars 9, as shown in Figure 2b and Figure 2d, after the connection of the longitudinal straight bars 9 is completed, the concrete pouring of the connection area 10 is implemented.

Referring to Fig. 3a, Fig. 3b, Fig. 3c and Fig. 3d, a horizontal connection is made between the horizontal connecting member 51 of the first corner prefabricated shear wall and the horizontal connecting member 61 of the second corner prefabricated shear wall, and the first corner prefabricated shear wall The first corner horizontal connecting bar 52 of the horizontal connecting member 51 located in the connecting area is a "U" shaped bar, and the second corner horizontal connecting bar 62 of the second corner prefabricated shear wall horizontal connecting member 61 located in the connecting area is also "U"-shaped ribs, as shown in Figure 3a and Figure 3c; in the connection area 10, the first corner horizontal connecting rib 52 and the second corner horizontal connecting rib 62 overlap each other to form a rectangular frame, located at the four corners of the rectangular frame The positions are connected in series by longitudinal straight bars 9, as shown in Figure 3b and Figure 3d, after the connection of the longitudinal straight bars 9 is completed, the concrete pouring of the connection area 10 is implemented.

Referring to Fig. 4a, Fig. 4b, Fig. 4c and Fig. 4d, the connection between the first floor prefabricated component 71 and the second floor prefabricated component 81, the first floor connecting rib 72 of the first floor prefabricated component 71 located in the connection area is "U" type reinforcement, the same is that the second floor slab connection reinforcement 82 that the second floor prefabricated component 81 is located in the connection area is also a "U" type reinforcement, as shown in Figure 4a and Figure 4c; in the connection area 10, the first The floor connecting ribs 72 and the second floor connecting ribs 82 overlap each other to form a rectangular frame, which are connected in series with the longitudinal straight ribs 9 at the four corners of the rectangular frame, as shown in Figures 4b and 4d. After the connection is completed, the concrete pouring of the connection area 10 is carried out.

Claims (3)

1. A reinforcing bar connection structure of prefabricated concrete members, characterized in that: the connection bar arranged in the connection zone between two prefabricated parts is a "U" type bar that is bent by a straight bar to be a "U" shape, At least one end of the "U"-shaped rib is pre-embedded in the prefabricated part to form a "U"-shaped connecting rib extending from the end of the prefabricated part. The "U"-shaped connecting ribs extending from the two prefabricated parts are staggered Arrange and overlap each other to form rectangular frames at the same longitudinal position, between the rectangular frames and at the four corners of the rectangular frames, connect in series with vertical straight bars to form a rectangular reinforcement cage . 2. The steel bar connection structure of prefabricated concrete members according to claim 1, characterized in that: both ends of the "U"-shaped connecting bars extending at the end of the prefabricated part are pre-embedded in the prefabricated part, forming a closed " U"-shaped connecting ribs. 3. The steel bar connection structure of prefabricated concrete members according to claim 1, characterized in that: the "U" type connecting bar extending at the end of the prefabricated part is pre-embedded in the prefabricated part at one end to form an opening "U"-shaped connecting ribs, a pair of overlapping "U"-shaped connecting ribs have opposite opening positions.