Adjustable diagonal bracing reinforcing structure of prefabricated double-sided laminated shear wall and construction method

Abstract

The invention discloses an adjustable diagonal bracing reinforcing structure of a prefabricated double-sided laminated shear wall and a construction method, and belongs to the technical field of building construction facilities, and the construction method comprises the following steps: deeply designing embedded bolts, mounting a fixed base, mounting a diagonal bracing and adjusting precision, and dismounting and transferring after concrete pouring. According to the adjustable diagonal bracing device, the adjustable diagonal bracing can be effectively adjusted in the horizontal direction and the vertical direction. The problems that in the prior art, an adjustable inclined strut cannot be effectively fixed to a fixing part due to vibration displacement of top plate concrete of an embedded fixing part of the adjustable inclined strut of the prefabricated double-face laminated shear wall are solved, and the adjustable inclined strut is fixed through expansion screws after pouring of the upper layer of concrete is completed, so that a concrete embedded installation pipeline is damaged; and later secondary rework construction is caused. And the construction quality of the prefabricated double-sided laminated shear wall is ensured to a great extent.

Description

Technical Field

[0001] This invention belongs to the field of building construction facilities technology, specifically relating to a prefabricated double-sided composite shear wall adjustable diagonal bracing reinforcement structure and construction method. Background Technology

[0002] With the development of the construction industry, prefabricated double-sided composite shear walls are being used more and more widely. Their standardized production can ensure the dimensional accuracy of components and the quality of concrete, with a finished product qualification rate of over 99%.

[0003] However, during the secondary pouring on site, there were still issues with the actual measured quantities exceeding the specifications.

[0004] In existing technologies, adjustable diagonal brace positioning devices have two major drawbacks:

[0005] First, the pre-embedded fasteners shifted due to the vibration of the top slab concrete, causing the diagonal bracing to become ineffective.

[0006] Secondly, after the upper layer of concrete is poured, expansion bolts are used for fixing, which can easily damage the pre-embedded pipelines and lead to rework, such as the existing technology CN201920194322.2, a prefabricated shear wall telescopic diagonal support rod.

[0007] Therefore, this invention proposes a prefabricated double-sided composite shear wall adjustable diagonal bracing reinforcement structure and construction method. Summary of the Invention

[0008] The technical problem to be solved by this invention is that it effectively solves the problem of misalignment between adjustable diagonal braces and embedded steel bars, as well as the problem of damage to water and electricity embedded pipelines caused by drilling holes in floor slabs. At the same time, the fixing base is a customized product that can be reused repeatedly during the construction of prefabricated double-sided composite shear walls, which greatly avoids material waste.

[0009] In order to solve the above-mentioned technical problems, the inventors derived the technical solution of the present invention through practice and summary. The present invention discloses an adjustable diagonal bracing reinforcement structure for a prefabricated double-sided composite shear wall, including a prefabricated double-sided composite shear wall and a top plate, wherein at least two sets of adjustable diagonal bracing are installed on both sides of the prefabricated double-sided composite shear wall.

[0010] The top of the adjustable diagonal brace is hinged with a fixing plate, which is fixedly installed on the side wall of the prefabricated double-sided composite shear wall.

[0011] The bottom of the adjustable diagonal brace is hinged to an adjustable base, which is connected to two sets of adjustable diagonal braces on the same side.

[0012] A fixed base is detachably installed at the bottom of the adjustable base, and the fixed base is installed on the top plate by pre-embedded bolts.

[0013] In a further technical solution, both the adjustable base and the fixed base are "C"-shaped; the adjustable base is positioned downwards and wraps around the fixed base;

[0014] Both the adjustable base and the fixed base are provided with fixing holes; two sets of fixing holes are provided on both sides of the adjustable base or the fixed base.

[0015] The adjustable base and the fixed base are fixed together by fixing bolts.

[0016] A construction method for a prefabricated double-sided composite shear wall adjustable diagonal bracing reinforcement structure includes the following steps:

[0017] Step 1: Detail the design and pre-embedded bolts;

[0018] Step 2: Install the fixed base;

[0019] Step 3: Installation and precision adjustment of diagonal bracing;

[0020] Step 4: Dismantle and reuse the concrete after pouring.

[0021] In a further technical solution, in step one, the design of the embedded bolts is refined, and the specific steps are as follows:

[0022] A1. First, the professional manufacturer produces precast double-sided composite shear walls according to the drawings, and pre-embeds 10mm diameter bolts in the precast double-sided composite shear walls; design points: position deviation ≤3mm, bolt exposed length 50mm;

[0023] A2. The channel steel holes of the fixed base are positioned at 100mm intervals and must be aligned with the pre-embedded bolts of the shear wall.

[0024] In a further technical solution, in step two, the fixed base is installed;

[0025] The fixing base includes a 600mm long No. 10 channel steel and a 10mm diameter pre-embedded bolt. The side of the No. 10 channel steel is provided with φ12mm fixing holes at 100mm intervals; the pre-embedded depth of the pre-embedded bolt is ≥150mm.

[0026] The specific steps are as follows: Before the initial setting of the top slab concrete, insert the pre-embedded bolts of the fixing base into the positioning holes of the template, and tie the pre-embedded bolts to the structural slab reinforcement. The verticality deviation is ≤1°.

[0027] Install the fixing plate and fixing nut, and connect the fixing nut to the top bolt. The preload force is controlled between 40 and 60 N·m. The fixing plate is fixedly connected to the precast double-sided composite shear wall.

[0028] In a further technical solution, step three involves the installation and precision adjustment of the diagonal brace, with the following specific steps:

[0029] B1. Horizontal connection: Align the fixing holes of the adjustable base with the holes of the fixed base, insert the fixing bolts, and do not tighten them yet, leaving room for sliding;

[0030] B2. Fixing of adjustable diagonal brace: The bottom end of the adjustable diagonal brace is hinged to the adjustable base, and the top end is connected to the hinge seat on the fixed plate;

[0031] B3. Verticality calibration: The verticality of the shear wall is checked by rotating the adjusting bolt in the middle of the adjustable brace and using a laser line projector. The allowable deviation is ≤8mm / 2m. After adjustment, tighten all fixing bolts with a torque ≥60N·m.

[0032] In a further technical solution, in step three, the adjustable base is made of 12mm thick Q235B steel plate, and an 80mm×12mm elongated adjustment groove is provided in the middle of the bottom surface. It is connected to the fixed base by M10×30mm fixing bolts, with a tightening torque ≥40N·m.

[0033] In a further technical solution, in step three, the adjustable diagonal brace includes a φ48mm×3.5mm steel pipe, with a central turnbuckle threadedly connected to the middle of the steel pipe. The two ends of the central turnbuckle are provided with 10mm thick ear plates, and holes are opened on the ear plates to connect the hinge seat of the fixing pad and the adjustable base respectively. The adjustment stroke of the central turnbuckle is ±100mm, and the accuracy is ±1mm.

[0034] In a further technical solution, in step four, after the concrete is poured, the adjustable base and adjustable diagonal brace are disassembled and reused. After the upper layer of concrete is poured and the strength reaches 75%, the adjustable base and adjustable diagonal brace are disassembled and the bolt holes are cleaned. The project is then transferred to the upper layer for construction, and the fixed base can be reused.

[0035] In a further technical solution, at least two sets of adjustable diagonal braces are provided, and they are installed vertically; both the adjustable base and the fixed base are "C"-shaped; the adjustable base is set downward and wraps around the fixed base; and two sets of fixing holes are provided on both sides of the adjustable base.

[0036] In summary, compared with the prior art, the present invention can achieve the following technical effects:

[0037] In this invention, the adjustable diagonal brace can be effectively adjusted in both horizontal and vertical directions. This invention solves the problems in existing technologies where the adjustable diagonal brace in precast double-sided composite shear walls cannot be effectively fixed to the pre-embedded fasteners due to displacement caused by the vibration of the top slab concrete, and where fixing the adjustable diagonal brace with expansion bolts after the upper layer of concrete has been poured results in damage to the pre-embedded installation pipelines, leading to rework later. This invention greatly ensures the construction quality of the precast double-sided composite shear wall. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a flowchart illustrating a construction method for a prefabricated double-sided composite shear wall adjustable diagonal bracing reinforcement structure according to the present invention.

[0040] Figure 2 This is a layout diagram of the overall reinforcement structure of the prefabricated double-sided composite shear wall adjustable diagonal bracing reinforcement structure of the present invention.

[0041] Figure 3 This is a detailed diagram of the node between the embedded bolts and the fixing pad of the present invention.

[0042] Figure 4 This is a detailed connection diagram of the adjustable diagonal brace of the present invention.

[0043] Figure 5 for Figure 4 Enlarged view of part A;

[0044] Figure 6 This is a diagram showing the connection structure between the fixed base and the adjustable base of the present invention.

[0045] In the diagram: 1. Adjustable base; 2. Embedded bolt; 3. Fixing nut; 4. Fixed base; 5. Adjustable diagonal brace; 6. Fixing pad; 7. Precast double-sided composite shear wall; 8. Top bolt; 9. Fixing bolt; Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0047] The application principle of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0048] Example 1

[0049] like Figure 1-6 As shown, this invention provides a technical solution:

[0050] A prefabricated double-sided composite shear wall adjustable diagonal bracing reinforcement structure, such as Figure 2 As shown, it includes a prefabricated double-sided composite shear wall 1 and a top slab, with at least two sets of adjustable diagonal braces 5 installed on both sides of the prefabricated double-sided composite shear wall 1.

[0051] The top of the adjustable diagonal brace 5 is hinged to a fixing plate 6, which is fixedly installed on the side wall of the prefabricated double-sided composite shear wall 1.

[0052] An adjustable base 1 is hinged to the bottom of the adjustable diagonal brace 5, and the adjustable base 1 is connected to two sets of adjustable diagonal braces 5 located on the same side respectively.

[0053] A fixed base 4 is detachably installed at the bottom of the adjustable base 1, and the fixed base 4 is installed on the top plate by pre-embedded bolts 2.

[0054] In a further technical solution, both the adjustable base 1 and the fixed base 4 are "C" shaped; the adjustable base 1 is positioned downwards and wraps around the fixed base 4;

[0055] Both the adjustable base 1 and the fixed base 4 are provided with fixing holes; the fixing holes are arranged in two sets on both sides of the adjustable base 1 or the fixed base 4.

[0056] The adjustable base 1 and the fixed base 4 are fixed together by fixing bolts 9.

[0057] A construction method for a prefabricated double-sided composite shear wall adjustable diagonal bracing reinforcement structure, the process is illustrated as follows: Figure 1 As shown, it includes the following steps:

[0058] Step 1: Detail the design of the embedded bolts. The specific steps are as follows:

[0059] A1. Professional manufacturers shall embed 10mm diameter bolts in the precast double-sided composite shear wall 7 according to the drawings, with a positional deviation of ≤3mm and an exposed bolt length of 50mm (including the thread section).

[0060] A2. For example Figure 6 As shown, the channel steel holes of the fixed base 4 are positioned at 100mm intervals and must be aligned with the pre-embedded bolts of the shear wall.

[0061] Step 2, as follows Figure 5 As shown, the installation of the fixed base involves the following steps: Before the initial setting of the top slab concrete, insert the pre-embedded bolts 2 of the fixed base 4 into the positioning holes of the template, and tie the bolts to the reinforcing steel of the structural slab, ensuring a verticality deviation of ≤1°. Install the fixed pad 6 and the fixed nut 3, controlling the pre-tightening force to 40–60 N·m. The fixed pad is 100mm × 100mm in size. The fixed pad is then fixedly connected to the precast double-sided composite shear wall.

[0062] The fixing base includes a 600mm long No. 10 channel steel and a 10mm diameter pre-embedded bolt. The side of the No. 10 channel steel is provided with φ12mm fixing holes at 100mm intervals; the pre-embedded depth of the pre-embedded bolt is ≥150mm.

[0063] Step 3: Installation and precision adjustment of the diagonal bracing. The specific steps are as follows:

[0064] B1. Horizontal connection: Align the fixing hole of the adjustable base 1 with the hole of the fixed base 4, insert the fixing bolt 3, and do not tighten it yet to leave a sliding allowance;

[0065] B2. Diagonal brace fixing: One end of the adjustable diagonal brace 5 is hinged to the adjustable base on the shear wall side, and the other end is connected to the adjustable base on the top plate side, with the bolts pre-tightened;

[0066] B3. Verticality calibration: By rotating the adjusting bolt in the middle of the diagonal brace, use a laser line projector to check the verticality of the shear wall. The allowable deviation is ≤8mm / 2m. After adjustment, tighten all fixing bolts with a torque ≥60N·m.

[0067] The adjustable base is made of 12mm thick Q235B steel plate, and has an 80mm×12mm elongated adjustment groove in the middle of the bottom surface. It is connected to the fixed base by M10×30mm fixing bolts, with a tightening torque ≥40N·m.

[0068] In a further technical solution, in step three, such as Figure 4 As shown, the adjustable diagonal brace includes a φ48mm×3.5mm steel pipe, with a central turnbuckle threadedly connected to the middle of the steel pipe. The two ends of the central turnbuckle are provided with 10mm thick ear plates, and holes are opened on the ear plates to connect the hinge seat of the fixing pad and the adjustable base respectively. The adjustment stroke of the central turnbuckle is ±100mm, and the accuracy is ±1mm.

[0069] Step 4: Dismantle and reuse after concrete pouring. After the upper layer of concrete is poured and the strength reaches 75%, dismantle the adjustable base and diagonal brace, clean the bolt holes, and transfer it to the upper layer for construction. The fixed base can be reused.

[0070] In a further technical solution, at least two sets of adjustable diagonal braces are provided, installed vertically; both the adjustable base and the fixed base are "C"-shaped; the adjustable base is positioned downwards and wraps around the fixed base; and two sets of fixing holes are provided on both sides of the adjustable base.

[0071] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0072] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A prefabricated double-sided composite shear wall adjustable diagonal bracing reinforcement structure, characterized in that, It includes a prefabricated double-sided composite shear wall (1) and a top slab, with at least two sets of adjustable diagonal braces (5) installed on both sides of the prefabricated double-sided composite shear wall (1); The top of the adjustable diagonal brace (5) is hinged with a fixing plate (6), which is fixedly installed on the side wall of the prefabricated double-sided composite shear wall (1). An adjustable base (1) is hinged to the bottom of the adjustable diagonal brace (5), and the adjustable base (1) is connected to two sets of adjustable diagonal braces (5) located on the same side respectively; A fixed base (4) is detachably installed at the bottom of the adjustable base (1), and the fixed base (4) is installed on the top plate by pre-embedded bolts (2).

2. The prefabricated double-sided composite shear wall adjustable diagonal bracing reinforcement structure according to claim 1, characterized in that, Both the adjustable base (1) and the fixed base (4) are "C" shaped; the adjustable base (1) is positioned downwards and wraps around the fixed base (4); Both the adjustable base (1) and the fixed base (4) are provided with fixing holes; the fixing holes are provided in two sets located on both sides of the adjustable base (1) or the fixed base (4); The adjustable base (1) and the fixed base (4) are fixed together by fixing bolts (9).

3. A construction method for a prefabricated double-sided composite shear wall adjustable diagonal bracing reinforcement structure, characterized in that: Includes the following steps: Step 1: Detail the design and pre-embedded bolts; Step 2: Install the fixed base; Step 3: Installation and precision adjustment of diagonal bracing; Step 4: Dismantle and reuse the concrete after pouring.

4. The construction method of a prefabricated double-sided composite shear wall adjustable diagonal bracing reinforcement structure according to claim 1, characterized in that: In step one, the design of the embedded bolts is refined, and the specific steps are as follows: A1. First, the professional manufacturer produces prefabricated double-sided composite shear walls according to the drawings. Prefabricated bolts with a diameter of 10mm are pre-embedded on the prefabricated double-sided composite shear walls (7). Design points: position deviation ≤3mm, bolt exposed length 50mm. A2. The channel steel holes of the fixed base are positioned at 100mm intervals and must be aligned with the pre-embedded bolts of the shear wall.

5. The construction method of a prefabricated double-sided composite shear wall adjustable diagonal bracing reinforcement structure according to claim 1, characterized in that: In step two, the fixed base is installed; The fixed base (4) includes a 600mm long No. 10 channel steel and a 10mm diameter pre-embedded bolt (2). The side of the No. 10 channel steel is provided with φ12mm fixing holes at 100mm intervals; the pre-embedded depth of the pre-embedded bolt (2) is ≥150mm. The specific steps are as follows: Before the initial setting of the top slab concrete, insert the pre-embedded bolts (8) of the fixing base (4) into the template positioning hole, and tie the pre-embedded bolts (2) to the structural slab reinforcement. The verticality deviation is ≤1°. Install the fixing plate (6) and the fixing nut (3), and connect the fixing nut (3) to the top bolt (8). The pre-tightening force is controlled at 40-60 N·m. The fixing plate (6) is fixedly connected to the precast double-sided composite shear wall (1).

6. The construction method of a prefabricated double-sided composite shear wall adjustable diagonal bracing reinforcement structure according to claim 1, characterized in that: In step three, the installation and precision adjustment of the diagonal brace are carried out as follows: B1. Horizontal connection: Align the fixing hole of the adjustable base (1) with the hole of the fixed base (4), insert the fixing bolt (9), and do not tighten it temporarily to leave a sliding allowance; B2. Fixing of adjustable diagonal brace (5): The bottom end of the adjustable diagonal brace (5) is hinged to the adjustable base (1), and the top end is connected to the hinge seat on the fixed pad (6); B3. Verticality calibration: The verticality of the shear wall is checked by rotating the adjusting bolt in the middle of the adjustable brace (5) and using a laser line projector. The allowable deviation is ≤8mm / 2m. After adjustment, tighten all fixing bolts (9) with a torque ≥60N·m.

7. The construction method of a prefabricated double-sided composite shear wall adjustable diagonal bracing reinforcement structure according to claim 6, characterized in that: In step three, the adjustable base (1) is made of 12mm thick Q235B steel plate, and an 80mm×12mm long strip adjustment groove is provided in the middle of the bottom surface. It is connected to the fixed base (4) by M10×30mm fixing bolts (9), and the tightening torque is ≥40N·m.

8. The construction method of a prefabricated double-sided composite shear wall adjustable diagonal bracing reinforcement structure according to claim 7, characterized in that: In step three, the adjustable diagonal brace (5) includes a φ48mm×3.5mm steel pipe with a central turnbuckle threaded in the middle of the steel pipe. The two ends of the central turnbuckle are provided with 10mm thick ear plates. Holes are opened on the ear plates and the hinge seat of the fixed pad and the adjustable base (1) are connected respectively. The adjustment stroke of the central turnbuckle is ±100mm and the accuracy is ±1mm.

9. The construction method of a prefabricated double-sided composite shear wall adjustable diagonal bracing reinforcement structure according to claim 1, characterized in that: In step four, after the concrete is poured, it is disassembled and reused. After the upper layer of concrete is poured and the strength reaches 75%, the adjustable base (1) and adjustable diagonal brace (5) are disassembled and the bolt holes are cleaned. It is then transferred to the upper layer for construction. The fixed base (4) can be reused.

Images