Prefabricated wall reinforcement positioning auxiliary device and prefabricated shear wall construction method

Abstract

The present invention relates to the field of building construction technology, and in particular to a prefabricated wall dowel positioning auxiliary device and a prefabricated shear wall construction method. The prefabricated wall dowel positioning auxiliary device includes a positioning template that is consistent with the shape of the bottom surface of the prefabricated shear wall. The positioning template is composed of a number of unit modules combined in a row. Each unit module is composed of a first split block and a second split block. The first split block and the second split block are respectively provided with limited petal blocks. The two limited petal blocks are combined into a limited cylinder when the first split block and the second split block are spliced. The limited cylinder is arranged corresponding to the distribution position of the reserved dowels and is used to clamp the reserved dowels. The above-mentioned prefabricated wall dowel positioning auxiliary device and the prefabricated shear wall construction method using the above-mentioned device avoid the problem of the deviation of the reserved dowels, ensure the reliable connection between the shear wall and the dowels, reduce the construction difficulty, improve the construction safety and construction quality, and meet the acceptance standards.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a prefabricated wall reinforcing bar positioning auxiliary device and a prefabricated shear wall construction method. Background Art

[0002] In the current design of prefabricated shear wall structures, prefabricated shear wall panels often encounter problems such as misalignment of reserved dowels, partial bending of reserved dowels, and insufficient length of reserved dowels during installation, which makes it difficult for the prefabricated shear wall panels to align with the dowels and fall down. In addition, the insufficient length of the reserved dowels will cause the steel bars to not extend sufficiently into the sleeve. The extension length that does not meet the requirements of the specifications will cause structural safety problems and will not be passed in the subsequent acceptance.

[0003] The existing measure to ensure the position of the reserved dowel bars is to use positioning steel plates, that is, according to the dowel bar layout diagram, holes of corresponding sizes are opened on the steel plates, and the positioning steel plates are used to ensure the accuracy of the reserved dowel bar positions when the steel bars are tied. However, the use of positioning steel plates has the following defects: 1) It can only ensure that the root position of the reserved dowel bars is not biased, and it cannot control the bending deviation of the upper or local parts of the steel bars; 2) Each prefabricated shear wall needs to be customized with positioning steel plates according to the dowel bar diagram, and the reusability rate is not high, which wastes materials; 3) The positioning steel plates can only assist in positioning when the steel bars are tied, and need to be removed when the prefabricated shear walls are hoisted, which is inconvenient to use and inefficient; 4) The positioning steel plates cannot control and check whether the extended length of the reserved dowel bars meets the requirements of the specifications. After the installation is completed, it is very likely that the steel bars will not be extended into the sleeve long enough.

[0004] The existing method of installing prefabricated shear walls is to use the tower crane to lift the prefabricated shear wall to the predetermined floor position using the lifting point at the top of the prefabricated shear wall. The workers manually adjust the position of the prefabricated shear wall so that the sleeve hole at the bottom of the prefabricated shear wall is aligned with the reserved dowel. Since the sleeve of the prefabricated shear wall is located at the bottom of the wall, it is necessary to lie on the ground and look up to see the sleeve hole at the bottom of the prefabricated shear wall during on-site lifting. If the dowel is offset or partially bent, it is necessary to keep the prefabricated shear wall suspended in the air, and at the same time, lie on the ground and use a hammer or other tools to hit the reserved dowel to align it with the sleeve hole. Since the prefabricated shear wall is still suspended in the air at this time, and the lateral support of the prefabricated shear wall has not been connected, there are great safety hazards when adjusting the steel bars. In addition, when the reserved dowel is offset or bent, resulting in the prefabricated shear wall not being installed, the on-site workers will even choose to directly cut off the offset dowel, which has a great impact on the safety of the entire structure. Once found, it will not pass the acceptance.

[0005] It can be seen from this that the deviation of the reserved dowel bars of the prefabricated shear wall in the prior art will make the installation of the prefabricated shear wall more difficult. If the deviation is serious and difficult to adjust, it will have a serious impact on the safety of the entire structure. Summary of the invention

[0006] Based on the above problems, an object of the present invention is to provide a prefabricated wall dowel positioning auxiliary device to solve the problem of offset of reserved dowels, facilitate accurate coordination with prefabricated shear walls, reduce construction difficulty, and improve construction safety.

[0007] Another object of the present invention is to provide a prefabricated shear wall construction method to reduce construction difficulty and meet acceptance requirements.

[0008] To achieve the above object, on the one hand, the present invention adopts the following technical solutions:

[0009] A prefabricated wall dowel positioning auxiliary device comprises a positioning template having the same shape as the bottom surface of a prefabricated shear wall, the positioning template is composed of a plurality of unit modules combined in a row, each unit module is composed of a first split block and a second split block, and the first split block and the second split block are respectively provided with limit petal blocks, and the two limit petal blocks are combined into a limit cylinder when the first split block and the second split block are spliced, and the limit cylinder is arranged corresponding to the distribution position of the reserved dowels and is used to clamp the reserved dowels.

[0010] In particular, the limiting petal block passes through the upper surface of the first split block or the second split block, and a flange located inside the corresponding split block is provided on the limiting petal block, and a spring is sandwiched between the flange and the lower surface of the corresponding split block, so that the limiting petal block drops after being acted upon by the prefabricated shear wall, exposing the reserved dowel bars.

[0011] In particular, limited angle steels are provided on the four corners of the positioning template to enable the prefabricated shear wall to be lowered along the limited angle steels, thereby ensuring that the bottom sleeve of the prefabricated shear wall is aligned with the position of the reserved dowel bars.

[0012] In particular, threaded holes are provided on the side surfaces of the unit modules, and adjacent unit modules are fixedly connected with bolts via connecting steel plates.

[0013] In particular, a plug connector is disposed on either one of the first split block and the second split block, and a plug interface is correspondingly disposed on the other one of the first split block and the second split block, so that the first split block and the second split block can be plugged in cooperation.

[0014] Particularly, a concrete vibration window is provided on the first sub-block and / or the second sub-block.

[0015] To achieve the above object, on the other hand, the present invention adopts the following technical solution:

[0016] A prefabricated shear wall construction method comprises the following steps: inserting the bottom sleeve of the prefabricated shear wall into a position with the reserved dowel bar, and using the above-mentioned prefabricated wall dowel bar positioning auxiliary device.

[0017] A) According to the bottom shape of the prefabricated shear wall and the distribution position of the reserved dowel bars, a positioning template of corresponding size is designed, and the positioning template is divided into a number of unit modules. Each unit module is composed of a first split block and a second split block, and the reserved dowel bars are wrapped and positioned by the combined limiting cylinder;

[0018] B) Connect and fix each unit module with connecting steel plates and bolts, and install limiting angle steels at the four corners of the positioning template;

[0019] C) Hoist the prefabricated shear wall, align the corners of the prefabricated shear wall with the limiting angle steel and slowly lower it. Due to the existence of the limiting cylinder, the position accuracy of the reserved dowel bars is guaranteed, so that the sleeve at the bottom of the prefabricated shear wall is accurately aligned and connected with the reserved dowel bars;

[0020] D) After the top of the reserved dowel is inserted into the sleeve, the lowering of the precast shear wall is stopped, the first and second sub-blocks of each unit module are separated, the positioning template is removed, and then the precast shear wall is continued to be lowered until the reserved dowel is fully inserted.

[0021] In particular, in step A), check whether the top end surface of the reserved dowel is flush with the top surface of the limiting cylinder. If so, it can be confirmed that the length of the reserved dowel meets the specification requirements; otherwise, the position of the dowel needs to be adjusted.

[0022] In particular, before step C), when pouring the lower layer of concrete, a vibrating rod is used to vibrate the lower layer of concrete through a concrete vibration window provided on the first sub-block or the second sub-block.

[0023] In particular, in step C), when the edge of the sleeve at the bottom of the prefabricated shear wall touches the limiting cylinder, due to the presence of the spring, the limiting cylinder will move downward with the prefabricated shear wall, so that the reserved dowel bar is exposed and inserted into the prefabricated shear wall.

[0024] In summary, the beneficial effect of the present invention is that, compared with the prior art, the prefabricated wall dowel positioning auxiliary device and the prefabricated shear wall construction method adopt a modular structure, and modules of different modules are selected for shear walls of different lengths for assembly to correspond to the position of each dowel, thereby avoiding the problem of displacement of the reserved dowels, ensuring reliable connection between the shear wall and the dowels, reducing the construction difficulty, improving the construction safety and construction quality, and meeting the acceptance standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a prefabricated wall dowel positioning auxiliary device provided in an embodiment of the present invention;

[0026] Figure 2 1. It is a schematic diagram of the disassembly of the prefabricated wall reinforcing bar positioning auxiliary device provided in an embodiment of the present invention;

[0027] Figure 3Schematic diagram of a unit module in a prefabricated wall reinforcing bar positioning auxiliary device provided in an embodiment of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the first split block in the prefabricated wall dowel positioning auxiliary device provided in an embodiment of the present invention;

[0029] Figure 5 It is a structural schematic diagram of the second split block in the prefabricated wall dowel positioning auxiliary device provided in an embodiment of the present invention.

[0030] In the figure:

[0031] 100-positioning template; 110-unit module; 111-first split block; 112-second split block; 113-limiting petal block; 114-threaded hole; 115-spring; 116-plug connector; 117-plug interface; 118-concrete vibration window; 200-connecting steel plate; 300-limiting angle steel; 400-reserved dowel bar. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection, it can be a mechanical connection, it can be an electrical connection, it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the description of the present invention, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0035] See also Figures 1 to 5 As shown, the preferred embodiment provides a prefabricated wall dowel positioning auxiliary device, including a positioning template 100 that is consistent with the shape of the bottom surface of the prefabricated shear wall, the positioning template 100 is composed of a plurality of unit modules 110 combined in a row, each unit module 110 is composed of a first split block 111 and a second split block 112, and limiting petal blocks 113 are respectively arranged on the first split block 111 and the second split block 112. The two limiting petal blocks 113 are combined into a limiting cylinder when the first split block 111 and the second split block 112 are spliced ​​together. The limiting cylinder is arranged corresponding to the distribution position of the reserved dowel 400, and is used to clamp the reserved dowel 400.

[0036] Among them, the combined limiting cylinder can clamp the reserved dowel bar 400 in the middle to ensure that the reserved dowel bar 400 is always vertical from top to bottom without deviation and local bending, thereby ensuring the verticality of the steel bar and facilitating the subsequent docking with the sleeve.

[0037] The length of the unit module 110 here is available in 150, 200, 250, 300 and other models according to the building module to match the shear walls of different lengths. The two sides of the unit module 110 are provided with threaded holes 114 at 30 mm from the edge to facilitate the use of connecting steel plates 200 and bolts to connect different unit modules 110. The connecting steel plate 200 here preferably adopts a comb-tooth shape. In this way, it is not necessary to unscrew all the bolts during later disassembly. Only the bolts need to be loosened, and the connecting steel plate 200 can be pulled out from the top, which is convenient for on-site construction and helps to improve construction efficiency.

[0038] According to the position of the reserved dowel bars 400 in the thickness direction of the prefabricated shear wall, the unit module 110 is divided into a first split block 111 and a second split block 112 in the thickness direction, wherein the first split block 111 and the second split block 112 are separate entities and are surrounded by steel plates welded on all sides.

[0039] Furthermore, the limiting petal block 113 passes through the upper surface of the first split block 111 or the second split block 112, and a flange located inside the corresponding split block is provided on the limiting petal block 113, and a spring 115 is sandwiched between the flange and the lower surface of the corresponding split block, so that the limiting cylinder can be moved in the vertical direction, so that the limiting petal block 113 is lowered after being acted upon by the prefabricated shear wall, exposing the reserved dowel bar 400.

[0040] A plug connector 116 is provided on one of the first split block 111 and the second split block 112, and a plug interface 117 is provided on the other of the first split block 111 and the second split block 112, so that the first split block 111 and the second split block 112 can be plugged in. This connection method facilitates the removal of the positioning template 100 to both sides after the prefabricated shear wall is hoisted, without affecting the subsequent fall of the prefabricated shear wall to the designated position.

[0041] Limiting angle steels 300 are provided at the four corners of the positioning template 100 to enable the prefabricated shear wall to be lowered along the limiting angle steels 300 to ensure that the bottom sleeve of the prefabricated shear wall is aligned with the position of the reserved dowel bars 400.

[0042] The first sub-block 111 or the second sub-block 112 is also provided with a concrete vibrating window 118. When pouring the lower layer of concrete, the vibrating rod can vibrate the lower concrete through the concrete vibrating window 118. The effective radius of the vibrating rod can cover the remaining unopened areas. In addition, the concrete vibrating window 118 can not only be used to vibrate the concrete, but also serve as a handle when pulling the unit module apart to both sides to remove it, making the removal process simple and convenient.

[0043] In this regard, the present embodiment further provides a prefabricated shear wall construction method, wherein the bottom sleeve of the prefabricated shear wall is aligned and plugged with the reserved dowel 400, and the above-mentioned prefabricated wall dowel positioning auxiliary device is used, which includes the following steps:

[0044] Step A): According to the bottom shape of the prefabricated shear wall and the distribution position of the reserved dowel bars 400, a positioning template 100 of corresponding size is designed, and the positioning template 100 is divided into a plurality of unit modules 110. Each unit module 110 is composed of a first split block 111 and a second split block 112, and the reserved dowel bars 400 are wrapped and positioned by the combined limiting cylinder.

[0045] It should be noted that it is necessary to check whether the top end surface of the reserved dowel bar 400 is flush with the top surface of the limiting cylinder. If so, it can be confirmed that the length of the reserved dowel bar 400 meets the requirements of the specification; otherwise, the position of the dowel bar needs to be adjusted to ensure that the steel bar extends to a sufficient length for insertion into the sleeve of the shear wall, and has the function of checking the qualified length of the dowel bar.

[0046] Step B) connect and fix each unit module 110 with the connecting steel plate 200 and bolts, and install the limiting angle steels 300 at the four corners of the positioning template 100 so that the subsequent prefabricated shear wall can fall accurately.

[0047] In addition, when pouring the lower layer of concrete, a vibrating rod is used to vibrate the lower layer of concrete through the concrete vibration window 118 opened on the first sub-block 111 or the second sub-block 112 .

[0048] Step C), after the concrete is finally set, the prefabricated shear wall is hoisted. The tower crane aligns the corners of the prefabricated shear wall with the limiting angle steel 300 and slowly lowers it. Due to the existence of the limiting cylinder, the position accuracy of the reserved dowel 400 is guaranteed, so that the sleeve at the bottom of the prefabricated shear wall is accurately aligned and connected with the reserved dowel 400.

[0049] It is worth mentioning that when the edge of the sleeve at the bottom of the prefabricated shear wall touches the limiting cylinder, due to the existence of the spring 115, the limiting cylinder will move downward with the prefabricated shear wall, so that the reserved dowel 400 is exposed and inserted into the prefabricated shear wall.

[0050] Step D): After the top of the reserved dowel 400 is inserted into the sleeve, the lowering of the prefabricated shear wall is stopped, the first split block 111 and the second split block 112 of each unit module 110 are separated, the positioning template 100 is removed, and then the prefabricated shear wall is continued to be lowered until the reserved dowel 400 is fully inserted to complete the assembly of the shear wall.

[0051] The equipment removed can be re-inserted and assembled on the floor above, and continue to be used for limiting the position of the rebars on that floor, checking the protruding length of the rebars, and assisting in the installation of prefabricated shear walls. After all use, it can be disassembled and recycled and continued to be used in other projects, saving resources.

[0052] In summary, the above-mentioned prefabricated wall dowel positioning auxiliary device and the prefabricated shear wall construction method using the prefabricated wall dowel positioning auxiliary device have the following advantages:

[0053] (1) The device uses standardized unit modules 110, which are assembled in a parameterized manner, have a high reuse rate, and can utilize resources with maximum efficiency;

[0054] (2) When installing the shear wall, the installation workers do not need to lie on the ground to observe whether the sleeve hole is aligned with the top of the reserved dowel bar 400. They only need to lower the prefabricated shear wall along the limit angle steel 300 to align it, which greatly reduces the difficulty of on-site construction and improves construction efficiency.

[0055] (3) After installing the device, the limit tube can be used to quickly check whether the length of the reserved dowel 400 meets the specification requirements;

[0056] (4) The movable limiting cylinder can not only ensure that the vertical position of the reserved dowel bar 400 is exactly aligned with the sleeve hole, but also can be lowered a certain distance along with the prefabricated shear wall, so that the tops of all the reserved dowel bars 400 can be simultaneously inserted into the holes of the sleeve at the bottom of the prefabricated shear wall;

[0057] (5) After ensuring that the sleeve of the prefabricated shear wall is connected to the reserved dowel bar 400, the first sub-block 111 or the second sub-block 112 can be simply plugged in and pulled apart to both sides, thereby removing the entire positioning auxiliary device without affecting the subsequent fall of the prefabricated shear wall to the designated position;

[0058] (6) The concrete vibrating window 118 on the split block can be used for vibrating concrete and can also serve as a handle, which is highly practical;

[0059] (7) The unit modules 110 are connected by comb-shaped connecting steel plates 200. The connecting steel plates 200 can be pulled out from the top by simply loosening the bolts, which is convenient for on-site construction and helps improve construction efficiency.

[0060] (8) The device is modular, parameterized, and refined, which conforms to the standardization and assembly emphasized by prefabricated buildings, and focuses on quality, safety, efficiency, and benefits. It will surely play an unlimited role in leading the transformation and upgrading of prefabricated building construction. Its construction method not only guarantees the requirements for improving the quality and efficiency of construction projects, but also guarantees the safety requirements of on-site construction, achieving change in standards and safety in speed.

[0061] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subjected to various changes and modifications, which are within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A prefabricated wall dowel positioning auxiliary device, characterized in that: It comprises a positioning template having the same shape as the bottom surface of the prefabricated shear wall, the positioning template is composed of a plurality of unit modules combined in a row, each of the unit modules is composed of a first split block and a second split block, the first split block and the second split block are respectively provided with a limited petal block, the two limited petal blocks are combined into a limited cylinder when the first split block and the second split block are combined, the limited cylinder is arranged corresponding to the distribution position of the reserved dowel bar, and is used to clamp the reserved dowel bar; The limiting petal block passes through the upper surface of the first split block or the second split block, and is provided with a flange located inside the corresponding split block, and a spring is sandwiched between the flange and the lower surface of the corresponding split block, so that the limiting petal block drops after being acted upon by the prefabricated shear wall, exposing the reserved dowel bars.

2. The prefabricated wall dowel positioning auxiliary device according to claim 1, characterized in that: Limiting angle steels are arranged on the four corners of the positioning template to enable the prefabricated shear wall to be lowered along the limiting angle steels, thereby ensuring that the bottom sleeve of the prefabricated shear wall is aligned with the position of the reserved dowel bars.

3. The prefabricated wall reinforcing bar positioning auxiliary device according to claim 1, characterized in that: The side surfaces of the unit modules are provided with threaded holes, and adjacent unit modules are fixedly connected by connecting steel plates and bolts.

4. The prefabricated wall reinforcing bar positioning auxiliary device according to claim 1, characterized in that: A plug connector is disposed on either one of the first split block and the second split block, and a plug interface is correspondingly disposed on the other one of the first split block and the second split block, so that the first split block and the second split block can be plugged in cooperation.

5. The prefabricated wall reinforcing bar positioning auxiliary device according to claim 1, characterized in that: The first sub-block and / or the second sub-block is provided with a concrete vibration window.

6. A method for constructing a prefabricated shear wall, wherein the bottom sleeve of the prefabricated shear wall is aligned and plugged with the reserved dowels, and the prefabricated wall dowel positioning auxiliary device according to any one of claims 1 to 5 is used, characterized in that: Includes steps: A) According to the bottom shape of the prefabricated shear wall and the distribution position of the reserved dowel bars, a positioning template of corresponding size is designed, and the positioning template is divided into a number of unit modules. Each unit module is composed of a first split block and a second split block, and the reserved dowel bars are wrapped and positioned by the combined limiting cylinder; B) Connect and fix each unit module with connecting steel plates and bolts, and install limiting angle steels at the four corners of the positioning template; C) Hoist the prefabricated shear wall, align the corners of the prefabricated shear wall with the limiting angle steel and slowly lower it. Due to the existence of the limiting cylinder, the position accuracy of the reserved dowel bars is guaranteed, so that the sleeve at the bottom of the prefabricated shear wall is accurately aligned and connected with the reserved dowel bars; D) After the top of the reserved dowel is inserted into the sleeve, the lowering of the precast shear wall is stopped, the first and second sub-blocks of each unit module are separated, the positioning template is removed, and then the precast shear wall is continued to be lowered until the reserved dowel is fully inserted.

7. The prefabricated shear wall construction method according to claim 6, characterized in that: In step A), check whether the top surface of the reserved dowel is flush with the top surface of the limiting cylinder. If so, it can be confirmed that the length of the reserved dowel meets the specification requirements; Otherwise, the position of the dowel bar needs to be adjusted.

8. The prefabricated shear wall construction method according to claim 6, characterized in that: Before step C), when pouring the lower layer of concrete, a vibrating rod is used to vibrate the lower layer of concrete through a concrete vibration window provided on the first sub-block or the second sub-block.

9. The prefabricated shear wall construction method according to claim 6, characterized in that: In step C), when the edge of the sleeve at the bottom of the prefabricated shear wall touches the limiting cylinder, due to the presence of the spring, the limiting cylinder will move downward with the prefabricated shear wall, so that the reserved dowel bar is exposed and inserted into the prefabricated shear wall.

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