A device for sealing existing holes in a concrete slab and a construction method thereof

Abstract

The present invention belongs to the field of building construction technology and relates to a sealing device and construction method for existing holes on a concrete slab, comprising a concrete slab with reserved holes, a top support member, a bottom sealing member, a reinforcement member and a connecting member, wherein the top support member comprises a ring frame, the upper end of the ring frame is bent outward to form a lap joint, the bottom sealing member comprises a coverless steel box, the ring frame is detachably mounted on the top inner ring of the coverless steel box and fits with the inner wall of the coverless steel box, the reinforcement member comprises a plurality of shear rods, the side wall of the coverless steel box is provided with a plurality of through holes for passing the shear rods, the connecting member is used to connect two different shear rods, and before pouring concrete, the coverless steel box is placed into the reserved holes of the existing concrete slab through the top support member, and then the coverless steel box is fixed by the shear rods. After the fixing is completed, the top support member is removed so that the subsequent concrete can cover the coverless steel box, so that the surface of the hole sealing part can be flush with the surface of the existing concrete slab.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a device for sealing existing holes on a concrete slab and a construction method thereof. Background Art

[0002] Due to various reasons such as the timing of mechanical and electrical bidding, it is inevitable that the holes reserved in the early stage of civil engineering cannot be used during mechanical and electrical installation construction, but they have to be blocked. At this time, the material transportation channel may have been closed, and other equipment may have been arranged around the holes. Especially for underground projects, it is extremely difficult to block the reserved holes according to conventional procedures such as setting up supports, breaking concrete and welding steel bars. The construction is extremely difficult and the blocking effect is difficult to guarantee.

[0003] A method for sealing a reserved hole, disclosed in Chinese patent document publication number CN106988436A, comprises the following steps: S1: reserving steel bars on the side walls of the reserved hole, the reserved steel bars extending a certain length into the hole; S2: making a prefabricated plate for sealing the reserved hole, the plane size of the prefabricated plate being slightly smaller than the size of the reserved hole; S3: placing the prefabricated plate at the bottom of the reserved hole, so that the bottom surface of the prefabricated plate is flush with the bottom surface of the reserved hole; S4: installing steel bars in the reserved hole and connecting the steel bars to the reserved steel bars; S5: filling the gap around the prefabricated plate and the opening of the reserved hole; S6: pouring concrete at the rest of the reserved hole to seal the hole. The method of the present invention uses the prefabricated plate as the bottom mold to seal the reserved hole without setting up a special bottom mold, and the prefabricated plate does not need to be removed as part of the structure. However, this patent still has some shortcomings: when sealing existing holes on existing concrete slabs, since no reserved steel bars and other sealing construction conditions are set in advance in the existing holes, the prefabricated panels are difficult to install in the existing holes and the connection effect with the side walls of the existing holes is poor. If you want to seal the existing holes, you need to set up additional brackets to support the sealing materials, which makes the construction process complicated and makes it difficult to quickly seal the existing holes. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in order to solve the problem of insufficient construction conditions and slow sealing construction speed when sealing existing holes, the present invention provides a sealing device and construction method for existing holes on a concrete slab to solve the above problems.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a sealing device and construction method for existing holes on a concrete slab, comprising a concrete slab with reserved holes, and also comprising a top support member, a bottom sealing member, a reinforcement member and a connecting member, the top support member comprising a ring frame, the upper end of the ring frame being bent outward to form a lap joint, the bottom sealing member comprising a coverless steel box, the outer wall of the coverless steel box being fitted with the inner wall of the hole reserved on the concrete slab, the ring frame being detachably mounted on the top inner ring of the coverless steel box and being fitted with the inner wall of the coverless steel box, the reinforcement member comprising a plurality of shear rods, the side wall of the coverless steel box being provided with a plurality of through holes for passing the shear rods, and the connecting member being used to connect two different shear rods.

[0006] Preferably, the ring frame is an angle steel ring frame, and the bottom of the ring frame and the top of the uncovered steel box are connected by bolts.

[0007] Preferably, the connecting piece includes a connecting sleeve, and the ends of the two connecting pieces are fixedly connected through the connecting sleeve, and the connecting sleeve adopts a first-level joint.

[0008] Preferably, slightly expansive concrete is poured into the uncovered steel box.

[0009] Preferably, the positions of the connecting sleeves located inside the uncovered steel box are staggered.

[0010] Preferably, the bottom of the uncovered steel box is covered with concrete color paint.

[0011] Preferably, a plurality of the shear rods are arranged crosswise in vertical and horizontal directions, and the number of the shear rods is proportional to the weight of the uncovered steel box.

[0012] Preferably, the height of the uncovered steel box is less than the depth of the hole.

[0013] A method for sealing existing holes on a concrete slab comprises the aforementioned device for sealing existing holes on the concrete slab, and further comprises the following steps:

[0014] S1. Customize the angle steel ring frame and uncovered steel box according to the size of the hole to be blocked, transport them to the site, and fasten them together with bolts to form a combined unit.

[0015] S2. Press the combination of the angle steel ring frame and the uncovered steel box into the existing hole on the concrete slab from top to bottom, and ensure that the height of the outer bottom surface of the uncovered steel box is greater than the height of the bottom surface of the concrete slab;

[0016] S3. Construction workers enter the uncovered steel box, drill holes into the existing concrete slab along the through holes in the side walls of the uncovered steel box, and inject rebar glue into the holes. They then insert multiple shear rods into the holes one by one along the through holes, and securely connect the ends of two shear rods on the same axis via the connecting sleeves.

[0017] S4. Remove the angle steel ring frame;

[0018] S5. Pour slightly expansive concrete of a higher grade into the uncovered steel box until it is flush with the top surface of the concrete slab;

[0019] S6. Paint the outer bottom of the uncovered steel box with concrete color paint until it is flush with the bottom surface of the concrete slab, wait for the micro-expansive concrete to completely solidify, and complete the sealing.

[0020] The beneficial effects of the present invention are: first, a top support and an uncovered steel box are provided, and before pouring concrete, the uncovered steel box is placed into the reserved hole of the existing concrete slab through the top support, and then the uncovered steel box is fixed by shear rods. After the fixing is completed, the top support is removed so that the subsequent concrete can cover the uncovered steel box, and the surface of the hole sealing part can be flush with the surface of the existing concrete slab.

[0021] Secondly, the top support parts and the uncovered steel box are easy and quick to assemble and disassemble, and can quickly seal redundant holes during the critical stage of mechanical and electrical installation, greatly saving construction time and reducing project costs.

[0022] Third, the combination of detachable top supports, shear rods and uncovered steel boxes eliminates the need for additional brackets and concrete pouring formwork during the hole sealing process. This not only shortens the construction period, but also reduces the loss of construction materials and the transportation costs of materials and equipment, ensuring construction efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the overall structure of a device for sealing existing holes on a concrete slab according to the present invention;

[0025] Figure 2 This is a schematic structural diagram of the working process of a device for sealing existing holes on a concrete slab according to the present invention;

[0026] Figure 3This is a schematic structural diagram of a top support member of a device for sealing existing holes on a concrete slab according to the present invention;

[0027] Figure 4 It is a structural schematic diagram of a connecting sleeve of a device for sealing existing holes on a concrete slab according to the present invention;

[0028] Figure 5 It is a structural schematic diagram of a uncovered steel box of a device for sealing existing holes on a concrete slab according to the present invention.

[0029] Figure numerals: 1. Top support; 2. Uncovered steel box; 3. Shear rod; 4. Bolt; 5. Connecting sleeve; 6. Concrete color paint; 7. Micro-expansive concrete; 8. Concrete slab. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] like Figures 1 to 5 As shown, the present invention provides an embodiment of a sealing device and a construction method for existing holes on a concrete slab, comprising a concrete slab 8 with reserved holes, and also comprising a top support member 1, a bottom sealing member, a reinforcement member and a connecting member. The top support member 1 comprises a ring frame, the upper end of the ring frame is bent outward to form a lap portion, so as to fix the ring frame to the top of the hole reserved on the concrete slab 8, the bottom sealing member comprises a uncovered steel box 2, the outer wall of the uncovered steel box 2 is fitted with the inner wall of the hole reserved on the concrete slab 8, the ring frame is detachably mounted on the top inner ring of the uncovered steel box 2 and is fitted with the inner wall of the uncovered steel box 2, the reinforcement member comprises a plurality of shear rods 3, the side wall of the uncovered steel box 2 is provided with a plurality of through holes for passing the shear rods 3, and the connecting member is used to connect two different shear rods 3.

[0032] The ring frame adopts an angle steel ring frame, and the bottom of the ring frame and the top of the uncovered steel box 2 are connected by bolts 4 to prevent the uncovered steel box 2 from falling during the construction process.

[0033] The connecting piece includes a connecting sleeve 5, and the ends of the two connecting pieces are fixedly connected through the connecting sleeve 5. The connecting sleeve 5 adopts a first-level joint.

[0034] A slightly expansive concrete 7 of a higher grade is poured into the uncovered steel box 2 to ensure that the concrete strength at the reserved holes meets the construction requirements.

[0035] The positions of the connecting sleeves 5 inside the uncovered steel box 2 are staggered to prevent different connecting sleeves 5 from pressing against each other and applying radial shear force to the shear rod 3, causing the shear rod 3 to bend and deform.

[0036] The height of the uncovered steel box 2 is smaller than the depth of the hole, and the bottom of the uncovered steel box 2 is covered with concrete color paint 6 to ensure that the surface of the reserved hole after blocking is consistent with the appearance of the existing concrete surface.

[0037] A plurality of shear rods 3 are arranged crosswise and vertically, and the number of the shear rods 3 is proportional to the weight of the uncovered steel box 2 .

[0038] A method for sealing existing holes in a concrete slab 8 includes the aforementioned device for sealing existing holes in a concrete slab 8, and further includes the following steps:

[0039] S1. Customize the angle steel ring frame and uncovered steel box 2 according to the size of the hole to be blocked, transport them to the site, and fasten them together with bolts 4 to form a combined unit for subsequent overall lifting operations;

[0040] S2. Press the combination of the angle steel ring frame and the uncovered steel box 2 from top to bottom into the existing hole on the concrete slab 8, and the height of the outer bottom surface of the uncovered steel box 2 is greater than the height of the bottom surface of the concrete slab 8. On the one hand, this prevents the uncovered steel box 2 from slightly lowering and protruding from the bottom surface of the existing concrete slab 8 after the angle steel ring frame is removed. On the other hand, it also reserves space for applying the concrete color paint 6, which is convenient for subsequent leveling of the bottom surface of the concrete slab 8.

[0041] S3, the construction workers enter the uncovered steel box 2, drill holes into the existing concrete slab 8 along the through holes on the side walls of the uncovered steel box 2, and inject rebar glue into the drilled holes, and then insert multiple shear rods 3 into the drilled holes one by one along the through holes. The unconnected shear rods 3 are conveniently inserted into the through holes. When the shear rods 3 are plugged in, the ends of the two shear rods 3 on the same axis are fixedly connected by the connecting sleeves 5 to ensure the connection strength of the shear rods 3 and prevent the shear rods 3 from slipping out of the through holes. When concrete is not poured, the angle steel ring frame cooperates with the shear rods 3 to support the uncovered steel box 2, which can prevent the uncovered steel box 2 from falling during construction.

[0042] S4. Remove the angle steel ring frame. At this time, the top and bottom of the uncovered steel box 2 are both located inside the reserved holes on the concrete slab 8. The top height of the uncovered steel box 2 is 3 cm lower than the top surface height of the existing concrete slab 8 and will not protrude outward. At this time, the uncovered steel box 2 is supported and fixed by the shear rods 3 to prevent the uncovered steel box 2 from falling too much after the angle steel ring frame is removed, which would affect the construction effect.

[0043] S5. Pour slightly expansive concrete 7 of a higher grade into the uncovered steel box 2 until it is flush with the top surface of the concrete slab 8, that is, the slightly expansive concrete 7 on the top of the uncovered steel box 2 can directly contact the inner wall of the reserved hole on the concrete slab 8, making the connection between the two tighter. In this application, the uncovered steel box 2 is directly used as a casting formwork, and the shear rods 3 are cast as concrete reinforcement bars. On the one hand, the material and transportation costs required for laying the casting formwork are saved. On the other hand, the uncovered steel box 2 is directly cast and buried in the reserved hole for blocking, which can effectively improve the structural strength after the hole is blocked. In addition, the uncovered steel box 2 is hoisted into place at one time, which saves construction time, reduces construction processes, and thus reduces safety hazards during construction.

[0044] S6. Paint the outer bottom of the uncovered steel box 2 with concrete color paint 6 until it is flush with the bottom surface of the concrete slab 8, wait for the slightly expansive concrete 7 to completely solidify and reach the strength required for construction, and complete the sealing.

[0045] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0046] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A device for sealing existing holes on a concrete slab, comprising a concrete slab (8) with holes reserved therein, characterized in that: It also includes a top support member (1), a bottom blocking member, a reinforcement member and a connecting member, wherein the top support member (1) includes a ring frame, the upper end of the ring frame is bent outward to form a lap joint, the bottom blocking member includes a coverless steel box (2), the outer wall of the coverless steel box (2) is fitted with the inner wall of the hole reserved on the concrete slab (8), the ring frame is detachably mounted on the top inner ring of the coverless steel box (2) and is fitted with the inner wall of the coverless steel box (2), the ring frame adopts an angle steel ring frame, the bottom of the ring frame and the top of the coverless steel box (2) are connected by bolts (4), the reinforcement member includes a plurality of shear rods (3), the side wall of the coverless steel box (2) is provided with a plurality of through holes for passing the shear rods (3), and the connecting member is used to connect two different shear rods (3); The connecting piece comprises a connecting sleeve (5), and the ends of the two connecting pieces are fixedly connected via the connecting sleeve (5), and the connecting sleeve (5) adopts a first-level joint.

2. The device for sealing existing holes in a concrete slab according to claim 1, characterized in that: Micro-expansive concrete (7) is poured into the uncovered steel box (2).

3. The device for sealing existing holes in a concrete slab according to claim 2, characterized in that: The positions of the connecting sleeves (5) located inside the uncovered steel box (2) are staggered.

4. The device for sealing existing holes in a concrete slab according to claim 3, characterized in that: The bottom of the uncovered steel box (2) is covered with concrete-colored paint (6).

5. The device for sealing existing holes in a concrete slab according to claim 4, characterized in that: The plurality of shear rods (3) are arranged crosswise in a vertical and horizontal manner, and the number of the shear rods (3) is proportional to the weight of the uncovered steel box (2).

6. The device for sealing existing holes in a concrete slab according to claim 5, characterized in that: The height of the uncovered steel box (2) is smaller than the depth of the hole.

7. A method for sealing existing holes on a concrete slab, characterized in that: The device for sealing existing holes in a concrete slab according to any one of claims 4 to 6 further comprises the following steps: S1. Customize the angle steel ring frame and the uncovered steel box (2) according to the size of the hole to be blocked, transport them to the site, and fix them together with bolts (4) to form a combined body; S2, pressing the combination of the angle steel ring frame and the uncovered steel box (2) from top to bottom into the existing hole on the concrete slab (8), and the height of the outer bottom surface of the uncovered steel box (2) is greater than the height of the bottom surface of the concrete slab (8); S3, the construction personnel enter the uncovered steel box (2), drill holes into the existing concrete slab (8) along the through holes on the side walls of the uncovered steel box (2), and inject rebar glue into the holes. After that, the multiple shear rods (3) are inserted into the holes along the through holes one by one, and the ends of the two shear rods (3) on the same axis are fixedly connected by the connecting sleeve (5); S4. Remove the angle steel ring frame; S5, pouring slightly expansive concrete (7) of a higher grade into the uncovered steel box (2) until it is flush with the top surface of the concrete slab (8); S6. Paint the outer bottom of the uncovered steel box (2) with a concrete color coating (6) until it is flush with the bottom surface of the concrete slab (8), and wait for the micro-expansion concrete (7) to completely solidify to complete the sealing.

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