Floor penetrating sleeve structure for post-trepanning construction and construction method

Abstract

The floor penetrating sleeve structure comprises an original structural plate, a hole is formed in the original structural plate, a floor penetrating sleeve is arranged in the hole in the original structural plate in a penetrating mode, and a water stop ring connected with the floor penetrating sleeve in a sealed mode is arranged in the middle of the wall of the floor penetrating sleeve in the circumferential direction. The water stop ring is located at the top of the hole and is in sealed connection with the edge of the hole, and the wall of the floor penetrating sleeve is in sealed connection with the inner wall of the hole through a sealing structure. The invention further discloses a construction method of the floor penetrating sleeve structure for post-trepanning construction. The method can be used for quickly and conveniently carrying out post-positioned floor penetrating sleeve construction, and can be widely applied to the field of mechanical and electrical installation of constructional engineering.

Description

Technical Field

[0001] This invention relates to the field of electromechanical installation in building engineering, and in particular to a through-slab sleeve structure and construction method for post-drilling construction. Background Technology

[0002] In the electromechanical installation of building construction, the problem of misalignment or omission of pre-embedded sleeves in floor slabs frequently occurs, inevitably leading to situations where holes are drilled in the floor slab later to install sleeves. Furthermore, there are also cases where subsequent modifications result in the drilling of holes to install sleeves through the floor slab. However, the conventional method for installing sleeves through the floor slab later involves using a water drill to create a hole in the concrete floor slab, setting a formwork at the lower end of the hole, and sealing the hole with concrete after the sleeve is installed and fixed. This method is inconvenient, inefficient, and poses a risk of leakage. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the above-mentioned background technology and provide a structure and construction method for a through-slab sleeve for post-drilling construction, so that post-installed through-slab sleeve construction can be carried out quickly and conveniently.

[0004] The present invention provides a through-slab sleeve structure for post-drilling construction, comprising an original structural slab with an opening, a through-slab sleeve passing through the opening, a water-stop ring connected to the sleeve in a sealed manner along the middle of the sleeve wall, the water-stop ring being located at the top of the opening and sealed to the edge of the opening, and the sleeve wall being sealed to the inner wall of the opening through a sealing structure.

[0005] In the above technical solution, the sealing structure on the wall of the through-floor sleeve includes a polyurethane sealant layer, the outer side of which is connected to the inner wall of the opening, and the inner side of which is connected to the wall of the through-floor sleeve.

[0006] In the above technical solution, the wall of the through-floor sleeve is covered with a ring-shaped PVC rubber and plastic board, and the outer side of the PVC rubber and plastic board is sealed and connected to the polyurethane sealant layer.

[0007] In the above technical solution, the inner side of the PVC rubber and plastic board is provided with a polyurethane sealant layer that is sealed and connected to the wall of the pipe sleeve penetrating the floor slab. The polyurethane sealant layer is sealed and connected to the inner side of the PVC rubber and plastic board.

[0008] In the above technical solution, the top of the floor slab sleeve is higher than the top of the original structural slab opening, and the bottom of the floor slab sleeve is flush with the bottom of the original structural slab opening.

[0009] In the above technical solution, the original structural board opening is a stepped tongue-and-groove structure with a large opening at the top and a small opening at the bottom. The outer diameter of the water-stop ring is smaller than the inner diameter of the upper cylinder of the tongue-and-groove but larger than the inner diameter of the lower cylinder of the tongue-and-groove. The water-stop ring is sealed to the top surface of the lower cylinder of the tongue-and-groove. The polyurethane sealant layer on the inner side of the PVC rubber and plastic board is connected to the through-floor sleeve inserted into the lower cylinder of the tongue-and-groove. The polyurethane sealant layer on the outer side of the PVC rubber and plastic board is connected to the inner wall of the lower cylinder of the tongue-and-groove.

[0010] In the above technical solution, the upper cylindrical part of the tongue and groove joint is provided with a micro-expansion impermeable concrete structural block that seals the water-stop ring with the top surface of the lower cylindrical part of the tongue and groove joint.

[0011] In the above technical solution, the sidewall of the micro-expansion impermeable concrete structural block and the inner wall of the upper cylindrical joint are provided with a cement grout layer of the same grade as the concrete of the upper cylindrical joint.

[0012] In the above technical solution, the micro-expansion impermeable concrete structural block is provided with a pre-made steel mesh, which is composed of a mesh disk and multiple steel bars evenly distributed along the circumference of the mesh disk. The center of the mesh disk is provided with a perforation for the passage of the floor slab sleeve.

[0013] This invention also provides a construction method for a through-slab sleeve structure using post-drilling construction, comprising the following steps: S1, fabricating a water-stopping through-slab sleeve: selecting a through-slab sleeve embedded in the original structural slab according to design requirements, welding a water-stop ring onto the through-slab sleeve with full welding on both sides, and attaching a PVC rubber-plastic board to the outer surface of the through-slab sleeve below the water-stop ring. The contact area between the PVC rubber-plastic board and the water-stop ring, as well as the vertical joints, are treated with polyurethane sealant; S2, drilling a hole in the original structural slab: drilling a hole in the original structural slab at the corresponding position as needed using a water drill, the size of the hole meeting the requirement in step S1 that the through-slab sleeve can pass through but the water-stop ring cannot; S3, enlarging and roughening the hole: based on the hole opening in step S2, roughening the upper part of the hole with a water drill. Enlarge the hole to half the thickness of the slab, ensuring the water-stop ring can pass through in step S1, creating a stepped tongue-and-groove joint at the opening. Roughen and clean the enlarged hole surface. S4. Install the through-slab sleeve: Apply a layer of polyurethane sealant to the side of the opening in step S2 and the surface of the PVC rubber-plastic board in step S1. Then insert the through-slab sleeve into the tongue-and-groove joint in step S3, ensuring a tight bond between the PVC rubber-plastic board and the lower surface of the opening. S5. Install the precast steel mesh: After the polyurethane sealant has cured, apply a layer of cement slurry of the same grade as the original structural slab concrete to the side of the opening in step S2, and promptly install the precast steel mesh. S6. Concrete pouring: Pour a micro-expansion impermeable concrete of a grade one higher than the original structural slab, and compact and cure it.

[0014] The present invention provides a structure and construction method for a through-floor sleeve installed via post-drilling, which has the following beneficial effects: This invention ensures no leakage at the interface between new and old concrete by using tongue-and-groove construction and roughening of the contact surface; it ensures no leakage at the joint between the through-slab sleeve and the concrete by setting water-stop rings and using micro-expansion anti-seepage concrete; it ensures no cracks in the subsequently poured concrete by setting precast steel mesh; and it strengthens weak points in the structure by applying polyurethane sealant to the concrete structural surface and the through-slab sleeve surface, forming a reliable waterproof guarantee. Furthermore, the opening method and the application of PVC rubber and plastic boards replace the formwork installation process, resulting in high construction efficiency. Moreover, it uses commonly used engineering materials in both material selection and construction, with on-site processing and construction, making materials readily available and construction simple, exhibiting good economic efficiency and practicality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the original structural slab and opening structure in the through-slab sleeve construction of the present invention. Figure 2 This is a schematic diagram of the flexible waterproof structure of Embodiment 1 of the through-slab sleeve construction for post-drilling construction of the present invention; Figure 3 This is a schematic diagram of the overall structure of Embodiment 1 of the through-slab sleeve construction for post-drilling construction of the present invention; Figure 4 This is a schematic diagram of the flexible waterproof structure and the finished steel mesh of Embodiment 2 of the post-drilling through-floor sleeve construction of the present invention. Figure 5 This is a schematic diagram of the finished steel mesh of Embodiment 2 of the through-slab sleeve construction for post-perforation construction of the present invention. Figure 6 This is a schematic diagram of the construction method for the through-slab sleeve structure of the present invention, which involves subsequent hole drilling. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, but these embodiments should not be construed as limiting the present invention.

[0017] Example 1 See Figures 1 to 3 The present invention relates to a through-slab sleeve structure for post-drilling construction, comprising an original structural slab 7, wherein an opening is provided in the original structural slab 7, and a through-slab sleeve 1 is inserted through the opening in the original structural slab 7. A water-stop ring 2 is provided in the middle of the wall of the through-slab sleeve 1 along the circumferential direction and is sealed to it. The water-stop ring 2 is located at the top of the opening and is sealed to the edge of the opening. The wall of the through-slab sleeve 1 is sealed to the inner wall of the opening through a sealing structure.

[0018] The sealing structure on the wall of the through-slab sleeve 1 includes 4 layers of polyurethane sealant. The outer side of the 4 layers of polyurethane sealant is connected to the inner wall of the opening, while the inner side of the 4 layers of polyurethane sealant is connected to the wall of the through-slab sleeve 1.

[0019] The wall of the through-slab sleeve 1 is covered with a ring-shaped PVC rubber and plastic board 3, and the outer side of the PVC rubber and plastic board 3 is sealed and connected to a layer of polyurethane sealant 4.

[0020] The inner side of the PVC rubber and plastic board 3 is provided with a layer of polyurethane sealant 4 that is sealed and connected to the wall of the through-floor sleeve 1. The polyurethane sealant 4 layer is sealed and connected to the inner side of the PVC rubber and plastic board 3.

[0021] The top of the through-slab sleeve 1 is higher than the top of the opening in the original structural slab 7, and the bottom of the through-slab sleeve 1 is flush with the bottom of the opening in the original structural slab 7.

[0022] The original structural slab 7 has a stepped tongue-and-groove structure with a large opening at the top and a small opening at the bottom. The outer diameter of the water-stop ring 2 is smaller than the inner diameter of the upper cylinder of the tongue-and-groove 5 but larger than the inner diameter of the lower cylinder of the tongue-and-groove 5. The water-stop ring 2 is sealed to the top surface of the lower cylinder of the tongue-and-groove 5. The polyurethane sealant 4 layer on the inner side of the PVC rubber and plastic board 3 is connected to the through-floor sleeve 1 inserted into the lower cylinder of the tongue-and-groove 5. The polyurethane sealant 4 layer on the outer side of the PVC rubber and plastic board 3 is connected to the inner wall of the lower cylinder of the tongue-and-groove 5.

[0023] The upper cylinder of the tongue and groove joint 5 is equipped with a micro-expansion impermeable concrete 6 structural block that seals the water-stop ring 2 with the top surface of the lower cylinder of the tongue and groove joint 5.

[0024] The sidewall of the micro-expansion impermeable concrete 6 structural block and the inner wall of the upper cylindrical part of the tongue and groove 5 are provided with a cement grout layer of the same grade as the concrete of the upper cylindrical part of the tongue and groove 5.

[0025] Example 2 This embodiment is basically the same as Embodiment 1, except that: See Figures 4 to 5 The micro-expansion impermeable concrete 6 structural block is provided with a pre-made steel mesh 8. The pre-made steel mesh 8 is composed of a mesh disk and multiple steel bars evenly distributed along the circumference of the mesh disk. The center of the mesh disk is provided with a through hole for the floor slab sleeve 1 to pass through.

[0026] Example 3 The construction process of the through-slab sleeve structure after realizing the present invention is as follows: S1. Fabrication of the water-stopping floor slab sleeve 1: Select the floor slab sleeve 1 embedded in the original structural slab 7 according to the design requirements. Weld a water-stopping ring 2 onto the floor slab sleeve 1. Adhere a PVC rubber and plastic board 3 to the outer surface of the floor slab sleeve 7 below the water-stopping ring 2. The length of the floor slab sleeve 1 shall not be less than the thickness h + 100mm, and the lower end shall be flush with the bottom of the original structural slab 7. The water-stopping ring 2 shall be 60mm wider than the edge of the floor slab sleeve 1 on each side and shall be fully welded on both sides. It shall be embedded in the center of the hole in the original structural slab 7. The PVC rubber and plastic board 3 shall be 20mm thick. Apply polyurethane sealant 4 to the entire surface of the sleeve for adhesion. The coating thickness shall be 0.5mm. Before adhesion, remove rust, oil, and impurities from the surface of the floor slab sleeve 1 to ensure that the bonding surface is dry and flat. Treat the contact area between the PVC rubber and plastic board 3 and the water-stopping ring 2 and the vertical joint with polyurethane sealant 4. S2. Opening a hole in the original structural slab 7: As needed, use a water drill (not shown in the figure) to open a hole through the original structural slab 7 at the corresponding position. The size of the hole is 20mm larger on each side than the outer diameter of the floor slab sleeve 1, so as to meet the requirement in step S1 that the floor slab sleeve 1 can pass through while the water-stop ring 2 cannot pass through. S3. Hole enlargement and roughening treatment: Based on the hole opening in step S2, the upper part of the hole is enlarged with a water drill. The hole enlargement depth is half the plate thickness. The enlargement size is 100mm outward from the original hole opening to meet the requirement that the water stop ring 2 can pass through in step S1, so that the hole opening cross section forms a stepped tongue and groove 5, and the enlarged hole surface is roughened and cleaned. S4. Install the through-slab sleeve 1: Apply a layer of polyurethane sealant 4 to the side of the opening in step S2 and the surface of the PVC rubber and plastic board 3 in step S1. Then insert the through-slab sleeve 1 into the tongue and groove 5 in step S3. At this time, the PVC rubber and plastic board 3 is tightly bonded to the lower surface of the opening, completing the installation and fixing of the through-slab sleeve 1, and at the same time serving as a concrete pouring template. S5. Install the finished steel mesh 8: After the polyurethane sealant 4 has cured, first brush a layer of cement slurry of the same grade as the concrete on the wall surface of the enlarged hole in step S3, and then promptly install the finished steel mesh 8. The outer contour of the finished steel mesh 8 is cylindrical, with a diameter 20mm smaller than the opening diameter of the original structural slab 7, and the diameter of the central hole is 15mm larger than the through-slab sleeve 1. It is made of Ф4 steel bars spot welded together, and has 4 steel bar legs at the bottom. The length is determined according to the opening depth of the original structural slab 7. By adjusting the angle of the legs, it is made to reach the inside corner of the hole in the original structural slab 7, thus completing the fixing of the finished steel mesh 8.

[0027] S6. Concrete pouring: Pour micro-expansion impermeable concrete 6, which is one grade higher than the original structural slab 7, and vibrate it to make it dense and strengthen its curing. Innovation points: 1. The method ensures no leakage at the interface between new and old concrete by using tongue-and-groove joints (5) and roughening the contact surface; it also strengthens the upper waterproofing structure by applying polyurethane sealant (4) to the concrete structural surface and the surface of the floor slab sleeve (1), forming a reliable waterproof guarantee. This method has a wide range of applications, is simple to construct, and has good waterproofing effect.

[0028] 2. By using a post-drilling method and attaching PVC rubber and plastic board 3 to the through-slab sleeve 1, the formwork installation process is eliminated, making construction convenient and efficient.

[0029] 3. By setting up precast steel mesh 8, it is ensured that no cracks will occur in the subsequent concrete pouring, and the installation and fixing are convenient without the need to install spacers.

[0030] 4. This method uses commonly used engineering materials in both material selection and construction, and the materials are processed and constructed on-site. The materials are readily available and the construction is simple, which makes it economical and practical.

[0031] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

[0032] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

Claims

1. A through-slab sleeve structure for post-drilling construction, comprising an original structural slab (7), wherein an opening is formed in the original structural slab (7), characterized in that: A floor slab sleeve (1) is installed inside the opening in the original structural slab (7). A water-stop ring (2) is provided in the middle of the wall of the floor slab sleeve (1) along the circumferential direction. The water-stop ring (2) is located at the top of the opening and is sealed to the edge of the opening. The wall of the floor slab sleeve (1) is sealed to the inner wall of the opening through a sealing structure.

2. The through-slab sleeve construction for post-drilling as described in claim 1, characterized in that: The sealing structure on the wall of the through-floor sleeve (1) includes a polyurethane sealant (4) layer, the outer side of which is connected to the inner wall of the opening, and the inner side of which is connected to the wall of the through-floor sleeve (1).

3. The through-slab sleeve construction for post-drilling as described in claim 2, characterized in that: The wall of the through-floor sleeve (1) is covered with a ring-shaped PVC rubber and plastic board (3), and the outer side of the PVC rubber and plastic board (3) is sealed and connected to the polyurethane sealant (4) layer.

4. The through-slab sleeve construction for post-drilling as described in claim 3, characterized in that: The inner side of the PVC rubber and plastic board (3) is provided with a polyurethane sealant (4) layer that is sealed and connected to the wall of the through-floor sleeve (1). The polyurethane sealant (4) layer is sealed and connected to the inner side of the PVC rubber and plastic board (3).

5. The through-slab sleeve construction for post-drilling as described in claim 4, characterized in that: The top of the through-slab sleeve (1) is higher than the top of the opening of the original structural slab (7), and the bottom of the through-slab sleeve (1) is flush with the bottom of the opening of the original structural slab (7).

6. The through-slab sleeve construction for post-drilling as described in claim 5, characterized in that: The original structural board (7) has a ring-shaped stepped tongue and groove (5) structure with a large opening at the top and a small opening at the bottom. The outer diameter of the water-stop ring (2) is smaller than the inner diameter of the upper cylinder of the tongue and groove (5) but larger than the inner diameter of the lower cylinder of the tongue and groove (5). The water-stop ring (2) is sealed to the top surface of the lower cylinder of the tongue and groove (5). The polyurethane sealant (4) layer on the inner side of the PVC rubber and plastic board (3) is connected to the through-floor sleeve (1) inserted into the lower cylinder of the tongue and groove (5). The polyurethane sealant (4) layer on the outer side of the PVC rubber and plastic board (3) is connected to the inner wall of the lower cylinder of the tongue and groove (5).

7. The through-slab sleeve construction for post-drilling as described in claim 6, characterized in that: The upper cylinder of the tongue and groove joint (5) is provided with a micro-expansion impermeable concrete (6) structural block that seals the water-stop ring (2) with the top surface of the lower cylinder of the tongue and groove joint (5).

8. The through-slab sleeve construction for post-drilling as described in claim 7, characterized in that: The side wall of the micro-expansion impermeable concrete (6) structural block and the inner wall of the upper cylindrical part of the tongue and groove (5) are provided with a cement grout layer of the same grade as the concrete of the upper cylindrical part of the tongue and groove (5).

9. The through-slab sleeve construction for post-drilling as described in claim 8, characterized in that: The micro-expansion impermeable concrete (6) structural block is provided with a pre-made steel mesh (8). The pre-made steel mesh (8) is composed of a mesh disk and multiple steel bars evenly distributed around the circumference of the mesh disk. The center of the mesh disk is provided with a perforation for the floor slab sleeve (1) to pass through.

10. A construction method for a through-slab sleeve structure using post-drilling, characterized in that: Includes the following steps: S1. Making a water-stopping through-floor sleeve (1): Select a through-floor sleeve (1) embedded in the original structural slab (7) according to the design requirements. Weld a water-stopping ring (2) on the through-floor sleeve (1) and fully weld it on both sides. PVC rubber and plastic board (3) is pasted on the outer surface of the through-floor sleeve (1) below the water-stopping ring (2). The contact part of the PVC rubber and plastic board (3) with the water-stopping ring (2) and the vertical joint are treated with polyurethane sealant (4). S2. Opening a hole in the original structural slab (7): As needed, use a water drill to open a hole through the original structural slab (7) at the corresponding position. The size of the hole should meet the requirement in step S1 that the floor slab sleeve (1) can pass through while the water-stop ring (2) cannot. S3. Hole enlargement and roughening treatment: Based on the hole opening in step S2, the upper part of the hole is enlarged by water drill. The hole enlargement depth is half the plate thickness to meet the requirement that the water stop ring (2) in step S1 can pass through, so that the hole cross section forms a stepped tongue and groove (5), and the enlarged hole surface is roughened and cleaned. S4. Install the through-slab sleeve (1): Apply a layer of polyurethane sealant (4) to the side of the opening in step S2 and the surface of the PVC rubber and plastic board (3) in step S1. Then insert the through-slab sleeve (1) into the tongue and groove (5) in step S3. The PVC rubber and plastic board (3) is tightly bonded to the lower surface of the opening. S5. Install the finished steel mesh (8): After the polyurethane sealant (4) has cured, brush a layer of cement slurry of the same grade as the original structural board (7) concrete on the side of the opening in step S2, and install the finished steel mesh (8) in time. S6. Concrete pouring: Pour micro-expansion impermeable concrete (6) of a grade one higher than the original structural slab (7), and vibrate and compact it and cure it.

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