Construction method for anti-splitting and sealing of temporary reserved holes

Abstract

The present invention belongs to the field of building construction technology, and specifically relates to a temporary reserved hole anti-splitting and sealing construction method, comprising the following steps: S1, steel bar pre-processing; S2, installation of bar-combing sealing parts and steel bar positioning; S3, concrete pouring; S4, preliminary installation of bending hanging plates; S5, steel bar bending and welding; S6, secondary adjustment and installation of bending hanging plates; S7, reserved hole plugging. The present invention can avoid directly cutting off the steel bars at the original position of the reserved hole, and at the same time solves the problem of concrete splitting and damage around the steel bars when bending the steel bars on site, so that the structural strength of the floor slab can bear the design load, and enhance the structural safety of the floor slab throughout the life cycle of the building.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a construction method for anti-splitting and sealing of a temporary reserved hole. Background Art

[0002] During the construction of building floors, in order to meet the construction needs of transferring large building materials and equipment, large holes will be reserved in advance. However, the construction problem of temporarily reserved holes in building floors has always been a difficult problem. At present, the industry generally adopts two approaches to this problem:

[0003] First, reserve the template and cut off the original steel bars, and then use the rebar planting method to deal with the original holes in the subsequent plugging stage. This method pre-plans the position and size of the reserved holes according to the actual needs of the building floor construction process; then install the prepared template in place and fix it firmly to prevent its position from shifting, and then pour the concrete. After the concrete is poured and formed, cut off the steel bars at the reserved hole position; when the reserved hole needs to be closed, re-implant the steel bars on the side wall of the reserved hole, and then pour concrete, so that the newly implanted steel bars and concrete form a force-bearing whole. However, due to the limited size of the reserved holes, the space for workers to carry out the rebar planting operation is small, resulting in a decrease in the anchoring force of the steel bars, which makes the bearing capacity of the original structure significantly reduced locally. In the later use process, if the use load is increased, it will have a huge impact on the structural bearing capacity and endanger the use function of the entire building.

[0004] Second, the template is reserved, the steel bars are bent on site without any protective measures, and then poured a second time. Since the steel bars are at the edge of the floor slab, the thickness of the protective layer is insufficient to provide sufficient bearing capacity for the steel bars. When bent, it will inevitably cause the lower steel bars and the concrete at the upper steel bars to split and damage, causing the lower edge of the concrete to break, resulting in the weakening of the local floor slab structure strength, which in turn affects the safety performance of the floor slab structure.

[0005] Chinese patent CN116971643A discloses a comprehensive construction method for protecting reserved holes in floor slabs of construction projects, comprising the following steps: step 1, making a ring-shaped steel formwork in advance; step 2, applying a release agent to the steel formwork and covering it with a layer of plastic film; step 3, installing a prefabricated steel skeleton in the steel formwork; step 4, pouring concrete in the steel formwork; step 5, taking out the in-situ prefabricated blocks after the concrete strength in the steel formwork reaches the requirement; step 6, using the in-situ prefabricated blocks to temporarily protect the reserved holes on site; step 7, after the reserved holes are used up, the reserved holes are blocked. This patent uses in-situ prefabricated blocks to temporarily protect the reserved holes on site, but does not take treatment measures for the steel bars at the reserved hole positions, resulting in poor stability of the joint between the newly poured concrete at the reserved hole positions and the existing old poured concrete of the floor slab during the construction link of blocking the reserved holes, which is prone to shrinkage cracks or leakage. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a construction method for anti-splitting and sealing of temporary reserved holes, so as to avoid directly cutting off the steel bars at the original positions of the reserved holes, and at the same time solve the problem of splitting and damage of concrete around the steel bars when the steel bars are bent on site, so that the structural strength of the floor slab can bear the design load, thereby enhancing the structural safety of the floor slab throughout the life cycle of the building.

[0007] The temporary reserved hole anti-splitting sealing construction method of the present invention comprises the following steps:

[0008] S1. Determine the location of reserved holes in the floor slab formwork according to the construction organization plan;

[0009] The steel bars are pre-bent and processed. After bending, the steel bars are divided into lower structural steel bars and upper structural steel bars. The bending angle of the lower structural steel bars is equal to the bending angle of the upper structural steel bars. The lower structural steel bars and the upper structural steel bars are tied in sequence.

[0010] S2. Determine the size of the reserved hole according to the construction organization plan, place a reinforcement sealing member at the location of the reserved hole, and set a plurality of reinforcement grooves on the side wall of the reinforcement sealing member. Adjust the positions of the lower reinforcement and the upper reinforcement of the structure so that they are arranged inside the reinforcement grooves;

[0011] S3, pouring concrete into the floor slab formwork, and after the concrete solidifies and forms, a floor structure slab is formed, and the rib-combing sealing member is removed, and a floor slab opening is formed in the floor structure slab at the original location of the rib-combing sealing member, and the floor slab opening is a reserved hole after the construction is formed;

[0012] S4. Place the bent hanging plate at the lower part of the floor opening, and use the T-shaped hanging reinforcement kit to fix the bent hanging plate;

[0013] S5. Several groups of in-situ bending locking hooks are arranged on the bending hanging plate. The in-situ bending locking hooks are hooked by using a double-sided bending device in the shape of a letter "S", and the steel bars at the bottom and the top of the structure are bent in plane in turn;

[0014] Use a double-sided bending machine to perform plane bending on the lower steel bars of the structure, and after plane bending, perform lap welding on the lower steel bars of the structure at both ends of the floor opening;

[0015] Use a double-sided bending machine to perform plane bending on the upper steel bars of the structure, and after plane bending, perform lap welding on the upper steel bars of the structure at both ends of the floor opening;

[0016] S6. Remove the T-shaped hanging reinforcement kit, reverse the bent hanging plate, make the side of the bent hanging plate away from the original bent locking hook close to the floor opening, install the T-shaped hanging reinforcement kit again, and fix the bent hanging plate;

[0017] S7. Pour and seal the floor openings. After pouring, remove the bent hanging plates and T-shaped hanging reinforcement kits. The removed bent hanging plates and T-shaped hanging reinforcement kits will continue to be used in the next turnover.

[0018] in:

[0019] The described "S"-shaped double-sided bender comprises a vertical rod body, a force ring is arranged at the top of the vertical rod body, a rotating beam is arranged at the bottom of the vertical rod body in cooperation with the in-situ bending locking hook, and a transverse bending arm is arranged at the side wall of the vertical rod body in cooperation with the lower steel bars of the structure and the upper steel bars of the structure. When in use, the rotating beam is inserted into the in-situ bending locking hook to form a rotation center, and torque is applied through the force ring to drive the vertical rod body to rotate along the rotating beam, thereby driving the transverse bending arm to realize the bending operation on the lower steel bars of the structure or the upper steel bars of the structure.

[0020] The T-type suspension reinforcement kit includes a T-type reinforcement rod, on which a cross arm and a limit block are arranged. The surface of the T-type reinforcement rod is provided with threads. The cross arm and the limit block are both threadedly arranged on the T-type reinforcement rod, and the limit block is located above the cross arm.

[0021] The height of the T-shaped reinforcement rod is greater than the height of the floor opening, and the length of the cross arm is greater than the length of the floor opening.

[0022] A stop block is fixedly provided at the bottom of the T-shaped reinforcement rod, and a rectangular hole is provided on the bending hanging plate to match the stop block. The length of the stop block is less than the length of the rectangular hole, and the length of the stop block is greater than the width of the rectangular hole. When fixing the bending hanging plate, the T-shaped reinforcement rod is vertically extended from the top of the floor opening into the rectangular hole of the bending hanging plate. When the T-shaped reinforcement rod is fully extended, it is rotated 90 degrees, and the stop block will change its position and block the rectangular hole, so that the bending hanging plate can be fixed from the top, avoiding the danger of high-altitude operation from the bottom.

[0023] The bent hanging plate is provided with two sets of bidirectional handle rings.

[0024] The comb rib sealing member comprises a front sealing baffle plate, the front sealing baffle plate is symmetrically provided with a rear sealing baffle plate in cooperation with a reserved hole, and two groups of comb rib guide sealing baffle plates are provided between the front sealing baffle plate and the rear sealing baffle plate in cooperation with the reserved holes.

[0025] The front sealing baffle plate, the rear sealing baffle plate and the two groups of comb rib guide sealing baffle plates are all arranged in an inverted isosceles trapezoid.

[0026] The plurality of groups of comb rib grooves are arranged in parallel on one side of the comb rib guide sealing plate.

[0027] The single lower structural steel bar and the single upper structural steel bar are tied together to form a group of steel bar bundles, and the group of steel bar bundles are cooperatively arranged in a group of bar combing grooves.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) Avoid directly cutting off the steel bars at the original positions of the reserved holes, so that the structural strength of the floor slab can bear the design load and enhance the structural safety of the floor slab throughout the life cycle of the building.

[0030] (2) The steel bars are bent in advance to solve the problem of splitting and damage of the concrete edges around the steel bars when the steel bars are bent on site, ensuring that the local strength of the floor slab is not damaged.

[0031] (3) By setting up the reinforcement seal, the reinforcement grooves on the side wall are used to position the reinforcement so that the reinforcement at the bottom and top of the structure can be accurately arranged, facilitating construction operations.

[0032] (4) The bending hanging plate and T-type hanging reinforcement kit provide an operating platform for bending steel bars and sealing holes, ensuring the stability of various components during the construction process and improving the quality and efficiency of sealing. The bending hanging plate and T-type hanging reinforcement kit can be used in a rotating manner to reduce construction costs.

[0033] (5) Construction workers fix the bent hanging plate from the top, which is conducive to ensuring construction quality, while improving construction convenience and stability and avoiding the danger of high-altitude operations from the bottom.

[0034] The present invention can enhance the structural stability of the floor slab throughout the life cycle of the building, avoid potential safety hazards caused by structural problems, facilitate construction operations, facilitate on-site operations of construction personnel, and simultaneously avoid material waste and reduce construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The present invention is a schematic diagram of the structure of the present invention without the comb rib sealing member and the Chinese-shaped double-sided bender Figure 1 ;

[0036] Figure 2 The present invention is a schematic diagram of the structure of the present invention without the comb rib sealing member and the Chinese-shaped double-sided bender Figure 2 ;

[0037] Figure 3 It is a schematic diagram of the structure of the lower steel bars and the upper steel bars in the bar-combing seal in the present invention;

[0038] Figure 4 It is a schematic diagram of the structure of the bending hanging plate, the in-situ bending locking hook, the two-way handle ring, the rectangular hole and the T-shaped hanging reinforcement kit in the present invention;

[0039] Figure 5 It is a structural schematic diagram of the comb rib sealing member in the present invention;

[0040] Figure 6 It is a schematic diagram of the structure of the T-type suspension reinforcement kit in the present invention;

[0041] Figure 7 It is a structural schematic diagram of the sergeant-shaped double-sided bender of the present invention;

[0042] Figure 8 The structure of the bending hanging plate, the in-situ bending locking hook, the floor opening and the two-way handle ring in the present invention is shown in FIG. Figure 1 ;

[0043] Fig. 9 The structure of the bending hanging plate, the in-situ bending locking hook, the floor opening and the two-way handle ring in the present invention is shown in FIG. Figure 2 ;

[0044] Fig.10 The schematic diagram of the partial structure of the lower structural steel bar, the upper structural steel bar, the bent hanging plate, the in-situ bent locking hook, the two-way handle ring and the floor structure plate in the present invention Figure 1 ;

[0045] Fig.11 It is a partial structural schematic diagram of the lower structural steel bars, the upper structural steel bars, the bending hanging plate, the in-situ bending locking hook, the two-way handle ring, the V-shaped double-sided bender and the floor structure plate in the present invention;

[0046] Fig.12 The schematic diagram of the partial structure of the lower structural steel bar, the upper structural steel bar, the bent hanging plate, the in-situ bent locking hook, the two-way handle ring and the floor structure plate in the present invention Figure 2 ;

[0047] Fig.13 The schematic diagram of the partial structure of the lower structural steel bar, the upper structural steel bar, the bent hanging plate, the in-situ bent locking hook, the two-way handle ring and the floor structure plate in the present invention Figure 3 ;

[0048] In the figure:

[0049] 1. Lower structural steel bars; 2. Upper structural steel bars; 3. Comb bar sealing parts; 301. Comb bar groove; 302. Front sealing baffle; 303. Rear sealing baffle; 304. Comb bar guide sealing baffle; 4. Bending hanging plate; 5. Floor opening; 6. Floor structure plate; 7. T-type hanging reinforcement kit; 701. T-type reinforcement rod; 702. Cross arm; 703. Limit block; 8. In-situ bending locking hook; 9. S-shaped double-sided bender; 10. Two-way handle ring; 11. Rectangular hole. DETAILED DESCRIPTION

[0050] The present invention is specifically described and illustrated below in conjunction with embodiments.

[0051] Example 1

[0052] like Figure 1-13 As shown, the temporary reserved hole anti-splitting sealing construction method of the present invention comprises the following steps:

[0053] S1. Determine the location of reserved holes in the floor slab formwork according to the construction organization plan;

[0054] The steel bars are pre-bent and processed. After bending, the steel bars are divided into lower structural steel bars 1 and upper structural steel bars 2. The bending angle of the lower structural steel bars 1 is equal to the bending angle of the upper structural steel bars 2. The lower structural steel bars 1 and the upper structural steel bars 2 are tied in sequence.

[0055] S2. Determine the size of the reserved hole according to the construction organization plan, place the bar-binding sealing member 3 at the reserved hole position, the side wall of the bar-binding sealing member 3 is provided with a plurality of bar-binding grooves 301, and adjust the positions of the lower steel bars 1 and the upper steel bars 2 of the structure so that they are arranged inside the bar-binding grooves 301;

[0056] S3, pouring concrete into the floor slab formwork, and after the concrete solidifies and forms, a floor structure slab 6 is formed, and the rib-combing sealing member 3 is removed, and the original position of the rib-combing sealing member 3 forms a floor slab opening 5 in the floor structure slab 6, and the floor slab opening 5 is a reserved hole after the construction is formed;

[0057] S4, placing the bent hanging plate 4 at the lower part of the floor opening 5, and fixing the bent hanging plate 4 with a T-shaped hanging reinforcement kit 7;

[0058] S5. A plurality of sets of in-situ bending locking hooks 8 are provided on the bending hanging plate 4. The in-situ bending locking hooks 8 are hooked by a double-sided bending device 9 in the shape of a Chinese character, and the planar bending operation is performed on the lower steel bars 1 and the upper steel bars 2 of the structure in turn.

[0059] The lower structural steel bars 1 are plane-bent by using a double-sided bending device 9, and after the plane-bending, the lower structural steel bars 1 located at both ends of the floor opening 5 are overlap-welded;

[0060] The upper structural steel bars 2 are plane-bent by using a double-sided bending device 9, and after the plane-bending, the upper structural steel bars 2 at both ends of the floor opening 5 are overlap-welded;

[0061] S6, remove the T-shaped hanging reinforcement kit 7, reverse the bent hanging plate 4, make the side of the bent hanging plate 4 away from the original bent locking hook 8 close to the floor opening 5, install the T-shaped hanging reinforcement kit 7 again, and fix the bent hanging plate 4;

[0062] S7, pour and seal the floor opening 5, remove the bent hanging plate 4 and the T-shaped hanging reinforcement kit 7 after the pouring is completed, and the removed bent hanging plate 4 and the T-shaped hanging reinforcement kit 7 will continue to be used in the next turnover.

[0063] The shi-shaped double-sided bender 9 includes a vertical rod body, a force ring is provided at the top of the vertical rod body, a rotating beam is provided at the bottom of the vertical rod body in cooperation with the in-situ bending locking hook 8, and a transverse bending arm is provided on the side wall of the vertical rod body in cooperation with the lower structural steel bar 1 and the upper structural steel bar 2. When in use, the rotating beam is inserted into the in-situ bending locking hook 8 to form a rotation center, and torque is applied through the force ring to drive the vertical rod body to rotate along the rotating beam, thereby driving the transverse bending arm to achieve bending operation on the lower structural steel bar 1 or the upper structural steel bar 2.

[0064] The T-type suspension reinforcement kit 7 includes a T-type reinforcement rod 701, on which a cross arm 702 and a limit block 703 are arranged. The surface of the T-type reinforcement rod 701 is provided with threads. The cross arm 702 and the limit block 703 are both threadedly arranged on the T-type reinforcement rod 701, and the limit block 703 is located above the cross arm 702.

[0065] The height of the T-shaped reinforcement rod 701 is greater than the height of the floor opening 5, and the length of the cross arm 702 is greater than the length of the floor opening 5. The T-shaped reinforcement rod 701 serves as the main bearing structure to ensure the stability of the bending hanging plate 4 during the construction process. The cross arm 702 can increase the contact area between the T-shaped hanging reinforcement kit 7 and the floor structure plate 6, further enhancing the stability of the T-shaped hanging reinforcement kit 7.

[0066] A stopper is fixedly provided at the bottom of the T-shaped reinforcing rod 701, and a rectangular hole 11 is provided on the bending hanging plate 4 to match the stopper. The length of the stopper is less than the length of the rectangular hole 11, and the length of the stopper is greater than the width of the rectangular hole 11. When fixing the bending hanging plate 4, the T-shaped reinforcing rod 701 is vertically extended from above the floor opening 5 into the rectangular hole 11 of the bending hanging plate 4. When the T-shaped reinforcing rod 701 is fully extended, it is rotated 90 degrees, and the stopper will change its position and block the rectangular hole 11, so that the bending hanging plate 4 is fixed from the top, avoiding the danger of high-altitude operation from the bottom.

[0067] Two sets of two-way handle rings 10 are provided on the bending hanging plate 4. During the construction process, the construction personnel can conveniently install and adjust the position of the bending hanging plate 4 through the two-way handle rings 10, improve the construction efficiency, and conveniently use the bending hanging plate 4 to ensure smooth construction.

[0068] The rib-combing sealing member 3 includes a front sealing baffle 302, a rear sealing baffle 303 is symmetrically arranged in accordance with the reserved holes of the front sealing baffle 302, and two sets of rib-combing guiding sealing baffles 304 are arranged in accordance with the reserved holes between the front sealing baffle 302 and the rear sealing baffle 303. The rib-combing guiding sealing baffles 304 play a role in guiding the lower steel bars 1 and the upper steel bars 2 of the structure in the lateral direction.

[0069] The front sealing baffle plate 302, the rear sealing baffle plate 303 and the two sets of comb rib guide sealing baffle plates 304 are all arranged in an inverted isosceles trapezoid.

[0070] A plurality of groups of comb rib grooves 301 are arranged in parallel on one side of the comb rib guide baffle plate 304 .

[0071] A single lower structural steel bar 1 and a single upper structural steel bar 2 form a group of steel bar bundles, and a group of steel bar bundles are arranged in a group of steel bar grooves 301. The steel bar grooves 301 can prevent mutual interference and misalignment between the steel bar bundles. During the construction process, the steel bar bundles can always maintain the correct position, which is conducive to giving full play to the mechanical properties of the steel bar bundles and ensuring the safety of the building structure.

Claims

1. A construction method for preventing splitting and sealing of temporary reserved holes, characterized in that: The following steps are involved: S1. Determine the location of the reserved hole, pre-bend the steel bars, divide the steel bars into lower structural steel bars (1) and upper structural steel bars (2) after bending, and tie the lower structural steel bars (1) and upper structural steel bars (2) in sequence; S2. Place a reinforcement sealing member (3) at the reserved hole position, wherein the side wall of the reinforcement sealing member (3) is provided with a plurality of reinforcement grooves (301), and adjust the positions of the lower reinforcement (1) and the upper reinforcement (2) so that they are arranged inside the reinforcement grooves (301); S3, pouring concrete into the floor slab formwork, and after the concrete solidifies and forms, forming a floor structure slab (6), removing the reinforcement sealing member (3), and forming a floor slab opening (5) in the floor structure slab (6); S4, placing the bent hanging plate (4) at the lower part of the floor opening (5), and fixing the bent hanging plate (4) with a T-shaped hanging reinforcement kit (7); S5, a plurality of sets of in-situ bending locking hooks (8) are provided on the bending hanging plate (4), and the in-situ bending locking hooks (8) are hooked by using a double-sided bending device (9) in the shape of a Chinese character, and the planar bending operation is performed on the lower steel bars (1) and the upper steel bars (2) of the structure in turn; S6. Remove the T-shaped hanging reinforcement kit (7), turn the bent hanging plate (4) over so that the side of the bent hanging plate (4) facing away from the original bent locking hook (8) is close to the floor opening (5), and reinstall the T-shaped hanging reinforcement kit (7) to fix the bent hanging plate (4); S7, pouring and sealing the floor opening (5), removing the bent hanging plate (4) and the T-shaped hanging reinforcement kit (7) after pouring, and continuing to use the removed bent hanging plate (4) and the T-shaped hanging reinforcement kit (7) for the next turnover; The "S"-shaped double-sided bender (9) comprises a vertical rod body, a force ring is provided at the top of the vertical rod body, a rotating beam is provided at the bottom of the vertical rod body in conjunction with the in-situ bending locking hook (8), and a transverse bending arm is provided on the side wall of the vertical rod body in conjunction with the lower structural steel bar (1) and the upper structural steel bar (2); The T-shaped suspension reinforcement kit (7) includes a T-shaped reinforcement rod (701), and the T-shaped reinforcement rod (701) is provided with a cross arm (702) and a limit block (703); A stop block is fixedly provided at the bottom of the T-shaped reinforcement rod (701), and a rectangular hole (11) is provided on the bent hanging plate (4) to match the stop block; The comb rib sealing member (3) comprises a front sealing baffle (302), a rear sealing baffle (303) symmetrically arranged on the front sealing baffle (302) in cooperation with a reserved hole, and two groups of comb rib guide sealing baffles (304) are arranged between the front sealing baffle (302) and the rear sealing baffle (303) in cooperation with the reserved hole.

2. The construction method for preventing splitting and sealing of temporary reserved holes according to claim 1 is characterized in that: The surface of the T-shaped reinforcement rod (701) is provided with a thread, the cross arm (702) and the limit block (703) are both threadedly provided on the T-shaped reinforcement rod (701), and the limit block (703) is located above the cross arm (702).

3. The construction method for preventing splitting and sealing of temporary reserved holes according to claim 1 is characterized in that: The length of the stop block is smaller than the length of the oblong hole (11), and the length of the stop block is larger than the width of the oblong hole (11).

4. The construction method for preventing splitting and sealing of temporary reserved holes according to claim 1 is characterized in that: The height of the T-shaped reinforcement rod (701) is greater than the height of the floor opening (5), and the length of the cross arm (702) is greater than the length of the floor opening (5).

5. The construction method for preventing splitting and sealing of temporary reserved holes according to claim 1 is characterized in that: Two sets of bidirectional handle rings (10) are provided on the bent hanging plate (4).

6. The construction method for preventing splitting and sealing of temporary reserved holes according to claim 1 is characterized in that: The front sealing baffle (302), the rear sealing baffle (303) and the two sets of comb rib guide sealing baffles (304) are all arranged in an inverted isosceles trapezoidal shape.

7. The construction method for preventing splitting and sealing of temporary reserved holes according to claim 6, characterized in that: A plurality of groups of comb rib grooves (301) are arranged in parallel on one side of the comb rib guide sealing plate (304).

8. The construction method for preventing splitting and sealing of temporary reserved holes according to claim 7, characterized in that: A single structural lower steel bar (1) and a single structural upper steel bar (2) form a group of steel bar bundles, and the group of steel bar bundles are arranged in a group of bar combing grooves (301).

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