Prefabricated shear wall without grouting sleeve and assembly structure of prefabricated shear wall

Abstract

The utility model discloses a prefabricated shear wall without a grouting sleeve and an assembly structure thereof, the prefabricated shear wall comprises a prefabricated wall body, a steel reinforcement framework is pre-buried in the prefabricated wall body, the steel reinforcement framework comprises horizontal distribution bars, vertical distribution bars and tie bars, the upper end of the prefabricated wall body is provided with a plurality of connecting bars, and the connecting bars are connected with the prefabricated wall body. During factory production, the lower ends of the connecting ribs are pre-embedded in the upper end of the prefabricated wall body, assembling holes are formed in the lower end face of the prefabricated wall body, the connecting ribs and the assembling holes are vertically aligned in a one-to-one mode, and grouting holes are formed in the side face of the lower end of the prefabricated wall body and communicated with the assembling holes. In the assembly structure, a floor slab interval is arranged between the upper-layer prefabricated shear wall and the lower-layer prefabricated shear wall and forms a connecting position, the assembly hole is aligned with the connecting rib, the floor slab is provided with the connecting position, the connecting rib penetrates through the connecting position, the upper end of the connecting rib penetrates into the assembly hole, and self-compacting concrete is poured into the assembly hole. According to the utility model, the connection quality can be better ensured, the connection with higher strength is realized, the site construction is convenient, and the efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of construction, in particular to a prefabricated shear wall without grouting sleeve and an assembly structure thereof. Background Art

[0002] Prefabricated shear wall structure (prefabricated reinforced concrete wall panel structure) refers to a prefabricated or semi-prefabricated wall panel as the main component, which is assembled on site and partially cast in situ. It has the advantages of large lateral stiffness, good spatial integrity, high bearing capacity, good seismic performance, etc. It can save building height and increase the usable area. And because some or all of the building components are processed and manufactured in the factory, compared with cast-in-situ concrete shear walls, it has the advantages of high construction quality, fast production speed, convenient construction, environmental protection, resource conservation, and conducive to social sustainable development. Therefore, the development of prefabricated and assembled shear wall structure is in line with the goal of industrialization of construction and housing in my country, and is of great significance to the realization of building industrialization and the promotion of the development of green buildings.

[0003] The vertical connection method of prefabricated shear wall in prefabricated shear wall structure mainly adopts:

[0004] 1. Sleeve grouting connection, specifically, the embedded steel bars on the upper and lower prefabricated shear walls are butt-jointed through sleeves, and grouting is performed in the sleeves to achieve a high-strength connection. The disadvantages of this connection method are: (1) The butt-jointing and grouting procedures of the sleeves and steel bars are cumbersome and inconvenient for on-site construction; (2) The quality of the sleeve grouting operation is greatly affected by the construction level of the workers, and the tolerance rate for construction errors is low; (3) The sleeve is a special accessory for the butt-jointing of prefabricated building components, and has a complex structure and high manufacturing cost, which easily increases the project cost;

[0005] 2. Constrained grout-anchor lap connection, specifically, installing steel bars in the holes of the prefabricated shear wall, inserting the steel bars of the upper and lower prefabricated shear walls through the holes, and then pouring grout into the holes to achieve a high-strength connection. The disadvantage of this connection method is that: at present, in order to cooperate with the on-site assembly process, the steel bar installation structure in the holes is relatively complicated, and the installation of steel bars during on-site assembly construction is likely to delay the construction period.

[0006] 3. Cast-in-place connection, specifically, the connection between prefabricated structures is achieved by changing the assembly form, structure and construction process. Such connection methods include "tooth groove type with cast-in-place hidden column", "reserved steel frame type" and "ultra-high performance concrete (UHPC) joint connection". The disadvantage of this type of connection is that a large amount of formwork and cast-in-place wet operations are still required on site, and this type of connection can only withstand the upper load after the concrete strength of the connection part meets the bearing capacity requirements. It cannot meet the requirements of beam and slab support-free, does not give full play to the advantages of prefabricated buildings, and causes waste of resources.

[0007] 4. Dry connection, this type of connection mainly includes bolt connection and welding connection, mainly using embedded bolts or embedded steel plates for welding connection at horizontal joints. Bolt connection has poor integrity, and the connection structure is usually exposed to the outside, corrosion, wear and other conditions are inevitable, and its overall seismic performance still needs further research; welding connection inevitably causes problems such as large on-site welding workload and slow construction progress, and welding quality and welding residual stress will directly affect the seismic performance of the wall, making it difficult to guarantee the quality of the project.

[0008] Therefore, it is necessary to improve the existing vertical assembly connection method of prefabricated shear walls. For example, the application number CN201720863223.X discloses a high-rise assembled single-row hole prefabricated shear wall and its assembly structure, in which straight columnar assembly holes are arranged at the bottom and top of the prefabricated wall body, and the prefabricated shear walls located on the upper and lower sides of the floor slab are connected by inserting connecting bars into the straight columnar assembly holes and pouring self-compacting concrete.

[0009] But its structure has the following defects:

[0010] 1. The upper connecting reinforcement of the prefabricated shear wall needs to be tied and fixed during on-site assembly, and then self-compacting concrete is poured into the assembled hole. The cast-in-place concrete of the floor can only be poured after the self-compacting concrete has initially set. This process will affect the subsequent construction and installation of the prefabricated shear walls on the upper and lower sides, and correspondingly slow down the construction progress.

[0011] 2. The upper connecting reinforcement of the prefabricated shear wall needs to be installed on site. When connecting with the assembly hole at the upper end of the prefabricated wall, the connection is made by pouring self-compacting concrete on site. The workload on site is large, and it will affect the connection strength between the connecting reinforcement and the prefabricated wall, and the quality is unstable. Utility Model Content

[0012] The first object of the utility model is to provide a prefabricated shear wall without grouting sleeve.

[0013] The second object of the utility model is to provide an assembly structure of the prefabricated shear wall without the grouting sleeve.

[0014] The utility model can better ensure the connection quality, realize a higher strength connection, and is convenient for on-site construction with high efficiency.

[0015] The first object of the utility model is achieved by the following technical solutions:

[0016] A prefabricated shear wall without grouting sleeves comprises a prefabricated wall body, a steel frame is embedded in the prefabricated wall body, the steel frame comprises horizontal distribution bars, vertical distribution bars and tie bars, and is characterized in that: a plurality of connecting bars are arranged at the upper end of the prefabricated wall body, the lower ends of the connecting bars are embedded in the upper end of the prefabricated wall body during factory production, the upper ends of the connecting bars pass through the upper end of the prefabricated wall body, an assembly hole is provided on the lower end surface of the prefabricated wall body, the connecting bars and the assembly holes are aligned one by one, a grouting hole is provided on the side surface of the lower end of the prefabricated wall body, the grouting hole is connected with the assembly hole, and the connecting bars, the grouting hole and the assembly hole are staggered with the steel frame.

[0017] Furthermore, the connecting reinforcement is a straight steel bar which is vertically embedded in the prefabricated wall.

[0018] Furthermore, the connecting ribs and the assembly holes are arranged in the middle of the prefabricated wall and are arranged in sequence along the length direction of the prefabricated wall.

[0019] Furthermore, the number of reserved assembly holes at the lower end of the prefabricated shear wall can be set according to the wall width and calculation requirements.

[0020] Furthermore, the assembly hole at the lower end of the prefabricated shear wall is arranged on the inner side of the shear wall reinforcement skeleton, and the diameter D of the assembly hole is much larger than the diameter of the connecting reinforcement, which is convenient for later construction alignment.

[0021] Furthermore, the grouting hole is an arc-shaped curved hole or a straight column-shaped inclined hole.

[0022] The second purpose of the utility model is achieved through the following technical solutions:

[0023] An assembly structure of a prefabricated shear wall, characterized in that: the assembly holes of the upper prefabricated shear wall and the connecting bars of the lower prefabricated shear wall are aligned, a floor space is provided between the top end of the lower prefabricated shear wall and the bottom end of the upper prefabricated shear wall to form a connecting position, the connecting bars pass through the connecting position, the upper ends of the connecting bars are inserted into the assembly holes, and self-compacting concrete is poured into the assembly holes.

[0024] Furthermore, the floor slab is a composite floor slab, or a fully prefabricated slab, or a cast-in-place floor slab.

[0025] Furthermore, the connection positions are horizontally connected by means of floor slab reinforcement or additional reinforcement bars.

[0026] Furthermore, the floor slab and the prefabricated shear wall of the lower layer are fixedly connected via right-angle supports.

[0027] Furthermore, the floor slab is directly overlapped on the precast shear wall of the lower layer.

[0028] Compared with the prior art, the utility model has the following beneficial effects:

[0029] 1. The prefabricated shear wall of the utility model has the connecting bars embedded in the upper end of the prefabricated wall body during factory production, so there is no need to tie and fix the connecting bars separately at the construction site, which has higher construction efficiency and can greatly shorten the construction period.

[0030] 2. The connecting bars of the utility model are embedded and fixed in the factory, which can better maintain the fixing quality of the connecting bars. The verticality of the connecting bars and the connection quality with the prefabricated wall can be better guaranteed, thereby ensuring the construction quality of the subsequent assembly structure of the prefabricated shear wall.

[0031] 3. The connection bars of the utility model are embedded in the prefabricated wall during factory production, and are stronger and more stable than the connection made by pouring self-compacting concrete on site.

[0032] 4. When the prefabricated shear wall of the utility model is produced in the factory, only the upper end has exposed steel bars, while the lower end is flat and no steel bars are exposed, which is more advantageous during transportation and on-site assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of a prefabricated shear wall without grouting sleeve according to the first embodiment of the utility model;

[0034] Figure 2 It is a top view schematic diagram of a prefabricated shear wall without grouting sleeve according to the first embodiment of the utility model;

[0035] Figure 3 It is a bottom view schematic diagram of a prefabricated shear wall without grouting sleeve according to the first embodiment of the utility model;

[0036] Figure 4 It is a structural schematic diagram of the assembly structure of the prefabricated shear wall of the first embodiment of the utility model;

[0037] Figure 5 It is a structural schematic diagram of the assembly structure of the prefabricated shear wall of the second embodiment of the utility model;

[0038] Figure 6 It is a top view schematic diagram of a prefabricated shear wall without grouting sleeve according to the third embodiment of the utility model;

[0039] Figure 7 It is a bottom view schematic diagram of a prefabricated shear wall without grouting sleeve according to the third embodiment of the utility model;

[0040] Figure 8 It is a top view schematic diagram of a prefabricated shear wall without grouting sleeve according to the fourth embodiment of the utility model;

[0041] Fig. 9 It is a schematic bottom view of a prefabricated shear wall without grouting sleeves according to the fourth embodiment of the utility model.

[0042] Meaning of reference numerals in the figure:

[0043] 100-precast wall; 101-connecting reinforcement; 102-tie reinforcement; 103-horizontal distribution reinforcement; 104-assembly hole; 105-grouting hole; 106-vertical distribution reinforcement; 200-top floor; 300-floor; 301-precast floor; 302-floor reinforcement; 303-connection position; 400-seat mortar; 500-right-angle support; 600-self-compacting concrete. DETAILED DESCRIPTION

[0044] The utility model is further described below in conjunction with embodiments.

[0045] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0046] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0047] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0048] Embodiment 1:

[0049] like Figures 1 to 3 The figure shows a prefabricated shear wall without grouting sleeve according to the present embodiment, which comprises a prefabricated wall body 100 .

[0050] A steel skeleton is embedded in the prefabricated wall 100, and the steel skeleton includes a plurality of horizontal distribution bars 103, a plurality of vertical distribution bars 106 and a plurality of tie bars 102. The horizontal distribution bars 103 are arranged in sequence along the height direction of the prefabricated wall 100, and the vertical distribution bars 106 are arranged in sequence along the length direction of the prefabricated wall 100. The horizontal distribution bars 103 and the vertical distribution bars 106 are intersected, and the two ends of the tie bars 102 hold the horizontal distribution bars 103 or the vertical distribution bars 106 on both sides of the prefabricated wall 100.

[0051] A plurality of connecting ribs 101 are arranged in the middle of the upper end of the prefabricated wall 100. The lower end of the connecting rib 101 is pre-buried in the upper end of the prefabricated wall 100 during factory production. The connecting rib 101 and the prefabricated wall 100 are integrated in the produced prefabricated product, so there is no need to tie and fix the connecting rib 101 on site. The upper end of the connecting rib 101 passes through the upper end surface of the prefabricated wall 100 and extends vertically upward. The connecting ribs 101 are arranged in sequence along the length direction of the prefabricated wall 100.

[0052] An assembly hole 104 is provided in the middle of the lower end surface of the prefabricated wall 100, and the connecting rib 101 is aligned with the assembly hole 104 one by one. A grouting hole 105 is provided on the lower end side surface of the prefabricated wall 100, and the grouting hole 105 is connected with the assembly hole 104. During on-site construction, self-compacting concrete 600 can be poured through the grouting hole 105.

[0053] The connecting bars 101, the grouting holes 105 and the assembly holes 104 are all staggered with the steel skeleton and do not affect the steel bars of the steel skeleton.

[0054] The connecting bars 101 of this embodiment are straight steel bars, which are vertically embedded in the prefabricated wall 100 .

[0055] When the prefabricated shear wall of this embodiment is produced in the factory, only the upper end has exposed steel bars, while the lower end is flat and no steel bars are exposed.

[0056] The number of reserved assembly holes at the lower end of the prefabricated shear wall in this embodiment can be set according to the wall width and calculation requirements. The assembly holes at the lower end of the prefabricated shear wall are set inside the shear wall steel frame, and the assembly hole diameter D is much larger than the connecting steel bar diameter, which is convenient for later construction alignment.

[0057] like Figure 4 As shown, the present embodiment also discloses an assembly structure of the above-mentioned prefabricated shear wall without grouting sleeve, wherein the assembly hole 104 of the upper prefabricated shear wall is aligned with the connecting rib 101 of the lower prefabricated shear wall, and a floor 300 is provided between the top of the lower prefabricated shear wall and the bottom of the upper prefabricated shear wall to form a connecting position 303, and the position of the connecting position 303 is aligned with the assembly hole 104 of the upper prefabricated shear wall and the connecting rib 101 of the lower prefabricated shear wall, the connecting rib 101 passes through the connecting position 303, and the upper end of the connecting rib 101 is inserted into the assembly hole 104, and the self-compacting concrete 600 is poured in the assembly hole 104.

[0058] The floor slab 300 of this example is a composite floor slab, which is provided with floor slab reinforcement 302, and the bottom layer is a prefabricated floor slab 301. The prefabricated floor slab 301 is not directly overlapped on the prefabricated shear wall of the lower layer, but is fixedly connected to the prefabricated shear wall of the lower layer by a right-angle support 500.

[0059] The grouting hole 105 is an arc-shaped curved hole or a straight column-shaped inclined hole.

[0060] The construction process of the assembly structure of the prefabricated shear wall of this embodiment is as follows:

[0061] Step 1, the prefabricated shear wall of the lowest layer is first assembled on the foundation, a temporary fixing frame is built near the installation position, the prefabricated shear wall is hoisted to the installation position, and fixed by the temporary fixing frame, and the space between the lower end of the prefabricated shear wall and the foundation is filled with seat mortar 400; foundation connecting steel bars are first embedded in the corresponding assembly holes 104 on the foundation, and the foundation connecting steel bars are correspondingly inserted into the assembly holes 104 of the prefabricated shear wall of the lowest layer, and self-compacting concrete 600 is poured through the grouting holes 105, so that the prefabricated shear wall of the lowest layer is connected to the foundation;

[0062] Step 2: build a temporary support frame, install prefabricated floor slabs 301 on both sides above the prefabricated shear wall, and fix the prefabricated floor slabs 301 to the prefabricated shear wall of the lower layer through right-angle support members 500. The prefabricated floor slabs 301 are supported by the temporary support frame, and the exposed parts of the steel bars between the prefabricated floor slabs 301 are fixedly connected by mechanical connection or welding, and continuous floor slab steel bars 302 are laid above the prefabricated floor slabs 301; a connection position 303 is reserved at the corresponding position of the connection bar 101 at the upper end of the prefabricated shear wall, and the connection bar 101 passes through the connection position 303;

[0063] Step 3, pouring cast-in-place floor slab concrete on the precast floor slab 301, and after the cast-in-place floor slab concrete solidifies to reach the required strength, the precast floor slab 301 and the floor slab steel bars 302 are connected to form the floor slab 300;

[0064] Step 4, hoist the upper prefabricated shear wall on the floor of the floor slab 300, fill the space between the lower end surface of the upper prefabricated shear wall and the floor slab 300 with the seat mortar 400, fix the prefabricated shear wall by a temporary fixing frame, and insert the upper end of the connecting bar 101 into the assembly hole 104 of the upper prefabricated shear wall, and then inject the self-compacting concrete 600 through the grouting hole 105;

[0065] Repeat steps 2 to 4 to build up layer by layer. When the prefabricated shear wall of the top floor is connected to the top floor slab 200, the upper end of the connecting rib 101 on the prefabricated shear wall of the top floor is poured into the top floor slab 200.

[0066] Embodiment 2:

[0067] like Figure 5 The figure shows the assembly structure of the prefabricated shear wall without grouting sleeve of the second embodiment, which is different from the first embodiment in that:

[0068] The prefabricated floor 301 of the floor 300 and the top floor 200 of the second embodiment is directly overlapped on the prefabricated shear wall. During the construction process, there is no need to connect them through the right-angle support member 500 of the first embodiment, which simplifies the construction steps and reduces the workload on site.

[0069] Embodiment three:

[0070] like Figure 6 and Figure 7 The third embodiment is a prefabricated shear wall without grouting sleeves, which is different from the first embodiment in that the two ends of the horizontal distribution reinforcement 103 in the third embodiment pass through the two sides of the prefabricated wall 100 and extend outward by 100 to 300 mm, and the ends are bent into a U-shape.

[0071] Embodiment 4:

[0072] like Figure 8 and Fig. 9 The figure shows a prefabricated shear wall without grouting sleeve of Example 4, which is different from Example 1 in that the two ends of the horizontal distribution reinforcement 103 in Example 4 pass through the two sides of the prefabricated wall 100 and extend outward by 100 to 300 mm, and the ends of the horizontal distribution reinforcement 103 are not bent and connected.

[0073] The above-mentioned embodiments of the utility model are not intended to limit the protection scope of the utility model, and the implementation methods of the utility model are not limited to these. All other various forms of modifications, replacements or changes made to the above-mentioned structure of the utility model based on the above-mentioned contents of the utility model, in accordance with the common technical knowledge and customary means in the field, without departing from the above-mentioned basic technical ideas of the utility model, should fall within the protection scope of the utility model.

Claims

1. A prefabricated shear wall without grouting sleeve, comprising a prefabricated wall body, wherein a steel skeleton is embedded in the prefabricated wall body, wherein the steel skeleton comprises horizontal distribution bars, vertical distribution bars and tie bars, and wherein: A plurality of connecting bars are arranged at the upper end of the prefabricated wall. The lower ends of the connecting bars are embedded in the upper end of the prefabricated wall during factory production. The upper ends of the connecting bars pass through the upper end of the prefabricated wall. An assembly hole is arranged on the lower end surface of the prefabricated wall. The connecting bars are aligned with the assembly holes one by one. Grouting holes are arranged on the side surfaces of the lower end of the prefabricated wall. The grouting holes are connected with the assembly holes. The connecting bars, the grouting holes and the assembly holes are staggered with the steel skeleton.

2. The prefabricated shear wall without grouting sleeve according to claim 1 is characterized in that: The connecting bars are straight steel bars, which are vertically embedded in the prefabricated wall.

3. The prefabricated shear wall without grouting sleeve according to claim 1 is characterized in that: The connecting ribs and the assembly holes are both arranged in the middle of the prefabricated wall and are arranged in sequence along the length direction of the prefabricated wall.

4. The prefabricated shear wall without grouting sleeve according to claim 1 is characterized in that: The grouting hole is an arc-shaped curved hole or a straight column-shaped inclined hole.

5. An assembly structure of a prefabricated shear wall according to any one of claims 1 to 4, characterized in that: The assembly holes of the prefabricated shear walls of the upper layer are aligned with the connecting bars of the prefabricated shear walls of the lower layer. A floor space is provided between the top end of the prefabricated shear walls of the lower layer and the bottom end of the prefabricated shear walls of the upper layer to form a connecting position. The connecting bars pass through the connecting position, and the upper ends of the connecting bars are inserted into the assembly holes. Self-compacting concrete is poured into the assembly holes.

6. The assembly structure of the prefabricated shear wall according to claim 5, characterized in that: The floor slab is a composite floor slab, or a fully prefabricated slab, or a cast-in-place floor slab.

7. The assembly structure of the prefabricated shear wall according to claim 5, characterized in that: The connection positions are horizontally connected by floor slab reinforcement or additional reinforcement bars.

8. The assembly structure of the prefabricated shear wall according to claim 5, characterized in that: The floor slab and the prefabricated shear wall of the lower layer are fixedly connected via right-angle supports.

9. The assembly structure of the prefabricated shear wall according to claim 5, characterized in that: The floor slab is directly overlapped on the prefabricated shear wall of the lower layer.

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