Plugging device for existing hole in concrete slab and construction method

Abstract

The invention belongs to the technical field of building construction, and relates to a plugging device for an existing hole in a concrete plank and a construction method.The plugging device comprises the concrete plank with the reserved hole, a top supporting piece, a bottom plugging piece, a reinforcing piece and a connecting piece, the top supporting piece comprises an annular frame, the upper end of the annular frame is bent outwards to form a lap joint part, and the bottom plugging piece comprises an uncovered steel box; the ring frame is detachably installed on the inner ring of the top of the uncovered steel box and attached to the inner wall of the uncovered steel box, the reinforcing part comprises a plurality of shear rods, the side wall of the uncovered steel box is provided with a plurality of through holes for the shear rods to penetrate through, and the connecting part is used for connecting two different shear rods. Before concrete is poured, the uncovered steel box is placed in the reserved hole of the existing concrete plate through the top supporting piece, then the uncovered steel box is fixed through the shear rod, the top supporting piece is dismantled after fixing is completed, the uncovered steel box can be covered with follow-up concrete, and the surface of the hole plugging position can be flush with the surface of the existing concrete plate.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a plugging device and construction method for existing holes in a concrete slab. 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 utilized during mechanical and electrical installation construction, but they have to be plugged. At this time, the material transportation channels may have been closed, and other equipment may have been arranged around the holes. Especially for underground projects, it is extremely difficult to plug the reserved holes according to the conventional procedures such as erecting scaffolds, breaking concrete, and welding steel bars, and it is very difficult to ensure the plugging effect.

[0003] A method for plugging reserved holes disclosed in Chinese Patent Document No. CN106988436A includes the following steps: S1: Reserve steel bars on the side wall of the reserved hole, and the reserved steel bars extend a certain length into the hole; S2: Manufacture a precast slab for plugging the reserved hole, and the planar dimension of the precast slab is slightly smaller than the dimension of the reserved hole; S3: Place the precast slab at the bottom of the reserved hole so that the bottom surface of the precast slab is flush with the bottom surface of the reserved hole; S4: Install steel bars in the reserved hole and connect the steel bars with the reserved steel bars; S5: Fill the gaps around the precast slab and the orifice of the reserved hole; S6: Pour concrete at the remaining positions of the reserved hole to plug the hole. The method of the present invention plugs the reserved hole by using the precast slab as the bottom mold without specially setting up a bottom mold, and the precast slab does not need to be removed as a part of the structure. However, this patent still has some deficiencies: when plugging existing holes in an existing concrete slab, due to the lack of reserved steel bars and other plugging construction conditions in the existing holes in advance, it is difficult to install the precast slab in the existing holes and the connection effect with the side wall of the existing hole is poor. If you want to carry out plugging construction on the existing holes, additional brackets need to be set up to support the plugging material, resulting in a complex construction process and it is difficult to quickly plug the existing holes. Summary of the Invention

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

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: A plugging device and construction method for existing holes in a concrete slab, including a concrete slab with reserved holes, and further including a top support member, a bottom plugging member, a reinforcement member, and a connecting member. The top support member includes a ring frame, and the upper end of the ring frame is bent outward to form a lapping portion. The bottom plugging member includes an uncovered steel box, and the outer wall of the uncovered steel box fits with the inner wall of the hole reserved on the concrete slab. The ring frame is detachably installed on the inner circle of the top of the uncovered steel box and fits with the inner wall of the uncovered steel box. The reinforcement member includes a plurality of shear bars, and a plurality of through holes for passing through the shear bars are provided on the side wall of the uncovered steel box. The connecting member is used to connect two different shear bars.

[0006] Preferably, the ring frame is made of 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 member includes a connecting sleeve, and the ends of two connecting members are fixedly connected through the connecting sleeve. The connecting sleeve adopts a first-class joint.

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

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

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

[0011] Preferably, a plurality of the shear bars are arranged vertically and horizontally, and the number of the shear bars 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 construction method for plugging existing holes in a concrete slab, including the plugging device for existing holes in a concrete slab as described above, and further including the following steps: S1. Customize the angle steel ring frame and the uncovered steel box according to the size of the hole to be plugged, transport them to the site, and fix the two together by bolts to form a combined body; S2. Press the combined body of the angle steel ring frame and the uncovered steel box into the existing hole in the concrete slab from top to bottom, and 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; S3. The construction workers enter the uncovered steel box, drill holes in the existing concrete slab along the through holes on the side wall of the uncovered steel box, inject planting glue into the drilled holes, and then insert a plurality of shear bars into the drilled holes along the through holes one by one. The ends of two shear bars on the same axis are fixedly connected through the connecting sleeve; S4. Remove the angle steel ring frame; S5. Pour slightly expanding concrete with a higher strength grade into the lidless steel box until it is flush with the top surface of the concrete slab. S6. Paint the outer bottom of the lidless steel box with concrete-colored paint until it is flush with the bottom surface of the concrete slab, and wait for the slightly expanding concrete to fully solidify to complete the plugging.

[0014] The beneficial effects of the present invention are as follows: First, there are a top support and a lidless steel box. Before pouring the concrete, the lidless steel box is placed into the reserved hole of the existing concrete slab through the top support, and then the lidless 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 lidless steel box, and the surface of the hole plugging can be flush with the surface of the existing concrete slab.

[0015] Second, the top support and the lidless steel box are convenient and fast to disassemble and assemble. During the critical stage of rushing the construction period for mechanical and electrical installation, the rapid plugging of redundant holes can be realized, which can greatly save the construction period and reduce the project cost.

[0016] Third, the detachable combination of the top support, shear rods and lidless steel box does not require additional brackets and concrete casting forms during the hole plugging process. On the one hand, it shortens the construction period, on the other hand, it reduces the loss of construction materials, and also reduces the transportation cost of materials and equipment, ensuring construction efficiency and construction safety. Description of the Drawings

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of the overall structure of a plugging device for existing holes on a concrete slab according to the present invention; Figure 2 It is a schematic diagram of the working process structure of a plugging device for existing holes on a concrete slab according to the present invention; Figure 3 It is a schematic diagram of the structure of the top support of a plugging device for existing holes on a concrete slab according to the present invention; Figure 4 It is a schematic diagram of the structure of the connecting sleeve of a plugging device for existing holes on a concrete slab according to the present invention; Figure 5 It is a schematic diagram of the structure of the lidless steel box of a plugging device for existing holes on a concrete slab according to the present invention.

[0019] Reference Numerals: 1, top support; 2, lidless steel box; 3, shear bar; 4, bolt; 5, connecting sleeve; 6, concrete-colored paint; 7, slightly expanding concrete; 8, concrete slab. Detailed Implementation Manner

[0020] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments.

[0021] As Figures 1 to 5 shown, the present invention provides an embodiment of a plugging device and construction method for existing holes on a concrete slab 8, including a concrete slab 8 with reserved holes, and further including a top support 1, a bottom plugging member, a reinforcement member, and a connecting member. The top support 1 includes a ring frame, and the upper end of the ring frame is bent outward to form a lapping portion for fixing the ring frame at the top end of the hole reserved on the concrete slab 8. The bottom plugging member includes a lidless steel box 2, and the outer wall of the lidless steel box 2 fits with the inner wall of the hole reserved on the concrete slab 8. The ring frame is detachably installed on the inner circle of the top of the lidless steel box 2 and fits with the inner wall of the lidless steel box 2. The reinforcement member includes a plurality of shear bars 3, and a plurality of through holes for passing the shear bars 3 are provided on the side wall of the lidless steel box 2. The connecting member is used to connect two different shear bars 3.

[0022] The ring frame adopts an angle steel ring frame, and the bottom of the ring frame and the top of the lidless steel box 2 are connected by bolts 4 to prevent the lidless steel box 2 from falling during construction.

[0023] The connecting member includes a connecting sleeve 5, and the ends of two connecting members are fixedly connected through the connecting sleeve 5. The connecting sleeve 5 adopts a first-class joint.

[0024] High-strength slightly expanding concrete 7 is poured into the lidless steel box 2 to ensure that the concrete strength at the reserved hole meets the construction requirements.

[0025] The positions of the connecting sleeves 5 located inside the lidless steel box 2 are staggered from each other to prevent the different connecting sleeves 5 from applying radial shear forces to the shear bars 3 after being pressed against each other, resulting in bending deformation of the shear bars 3.

[0026] The height of the lidless steel box 2 is less than the depth of the hole, and the bottom of the lidless steel box 2 is covered with concrete-colored paint 6 to ensure that the appearance of the surface of the reserved hole after plugging is consistent with the surface of the existing concrete.

[0027] A plurality of shear bars 3 are arranged vertically and horizontally, and the number of shear bars 3 is proportional to the weight of the lidless steel box 2.

[0028] A construction method for plugging existing holes on a concrete slab 8 includes the plugging device for existing holes on the concrete slab 8 as described above, and further includes the following steps: S1. Customize the angle steel ring frame and the lidless steel box 2 according to the size of the hole to be blocked, transport them to the site, and fix the two together by bolts 4 to form a combined body for subsequent overall hoisting operations; S2. Press the combined body of the angle steel ring frame and the lidless steel box 2 into the existing hole in the concrete slab 8 from top to bottom, and the height of the outer bottom surface of the lidless steel box 2 is greater than the height of the bottom surface of the concrete slab 8. On the one hand, it can prevent the lidless steel box 2 from slightly descending to protrude 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 the painting space for the concrete-colored paint 6, which is convenient for subsequent leveling of the bottom surface of the concrete slab 8; S3. The construction workers enter the lidless steel box 2, drill holes in the existing concrete slab 8 along the through holes on the side wall of the lidless steel box 2, inject the planting glue into the drilled holes, and then insert the multiple shear rods 3 into the drilled holes along the through holes one by one. The unconnected shear rods 3 are convenient to insert into the through holes. After the shear rods 3 are inserted, the ends of the two shear rods 3 on the same axis are fixedly connected by a connecting sleeve 5 to ensure the connection strength of the shear rods 3 and prevent the shear rods 3 from slipping out of the through holes. Before the concrete is poured, the angle steel ring frame cooperates with the shear rods 3 to support the lidless steel box 2, which can prevent the lidless steel box 2 from falling during the construction process; S4. Remove the angle steel ring frame. At this time, both the top and bottom of the lidless steel box 2 are inside the reserved hole in the concrete slab 8, and the height of the top of the lidless 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 lidless steel box 2 is supported and fixed by the shear rods 3 to avoid excessive downward movement of the lidless steel box 2 after the angle steel ring frame is removed, which affects the construction effect; S5. Pour high-strength micro-expansion concrete 7 into the lidless steel box 2 until it is flush with the top surface of the concrete slab 8, that is, the micro-expansion concrete 7 located at the top of the lidless steel box 2 can be in direct contact with the inner wall of the reserved hole in the concrete slab 8, making the connection between the two closer. In this application, the lidless steel box 2 is directly used as the pouring formwork, and the shear rods 3 are used as concrete reinforcement bars for pouring. On the one hand, it saves the materials and transportation costs required for laying the pouring formwork. On the other hand, directly pouring and burying the lidless steel box 2 into the reserved hole for blocking can effectively improve the structural strength after the hole is blocked. And the lidless steel box 2 is hoisted in place at one time, saving the construction period, reducing the construction process, and thus reducing the safety hazards during the construction process; S6. Paint the concrete-colored paint 6 on the outer bottom of the lidless steel box 2 until it is flush with the bottom surface of the concrete slab 8, and wait for the micro-expansion concrete 7 to completely solidify and reach the required strength for construction to complete the blocking.

[0029] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0030] Taking the above-mentioned ideal embodiments of the present invention as an inspiration, through the above description, relevant staff can completely make various changes and modifications within the scope without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A plugging device for existing holes on a concrete slab, comprising a concrete slab (8) with reserved holes, characterized in that: It also includes a top support member (1), a bottom plugging member, a reinforcement member, and a connecting member. The top support member (1) includes a ring frame. The upper end of the ring frame is bent outward to form a lapping portion. The bottom plugging member includes an uncovered steel box (2). The outer wall of the uncovered steel box (2) fits against the inner wall of the hole reserved on the concrete slab (8). The ring frame is detachably installed on the inner circle of the top of the uncovered steel box (2) and fits against the inner wall of the uncovered steel box (2). The reinforcement member includes a plurality of shear bars (3). A plurality of through holes for passing through the shear bars (3) are formed in the side wall of the uncovered steel box (2). The connecting member is used to connect two different shear bars (3).

2. The plugging device for existing holes on a concrete slab according to claim 1, characterized in that: The ring frame is made of an angle steel ring frame. The bottom of the ring frame and the top of the uncovered steel box (2) are connected by bolts (4).

3. A plugging device for existing holes on a concrete slab according to claim 2, characterized in that: The connecting member includes a connecting sleeve (5). The ends of two connecting members are fixedly connected through the connecting sleeve (5). The connecting sleeve (5) adopts a first-class joint.

4. A plugging device for existing holes on a concrete slab according to claim 3, characterized in that: Micro-expansion concrete (7) is poured into the uncovered steel box (2).

5. A plugging device for existing holes on a concrete slab according to claim 4, characterized in that: The positions of the connecting sleeves (5) located inside the uncovered steel box (2) are staggered from each other.

6. The plugging device for existing holes on a concrete slab according to claim 5, characterized in that: The bottom of the uncovered steel box (2) is covered with concrete-colored paint (6).

7. A plugging device for existing holes on a concrete slab according to claim 6, characterized in that: A plurality of the shear bars (3) are arranged vertically and horizontally in a criss-cross pattern. The number of the shear bars (3) is proportional to the weight of the uncovered steel box (2).

8. A plugging device for existing holes on a concrete slab according to claim 7, characterized in that: The height of the uncovered steel box (2) is less than the depth of the hole.

9. A construction method for plugging existing holes in a concrete slab, characterized in that, It includes a plugging device for the existing hole on the concrete slab according to any one of claims 6 to 8, and also includes 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 plugged, transport them to the site, and combine and fix them through bolts (4) to form a combined body; S2. Press the combined body of the angle steel ring frame and the uncovered steel box (2) into the existing hole on the concrete slab (8) from top to bottom, 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 workers enter the uncovered steel box (2), drill holes in the existing concrete slab (8) along the through holes on the side wall of the uncovered steel box (2), inject anchor glue into the drilled holes, and then insert a plurality of shear bars (3) into the drilled holes along the through holes one by one. The ends of two shear bars (3) on the same axis are fixedly connected through the connecting sleeve (5); S4. Remove the angle steel ring frame; S5. Pour high-strength micro-expansion concrete (7) into the uncovered steel box (2) until it is flush with the top surface of the concrete slab (8); S6. Apply concrete-colored paint (6) to the outer bottom of the uncovered steel box (2) 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 plugging.

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