Underground structure through-wall waterproof sleeve structure and construction method thereof

Abstract

The invention relates to the technical field of building construction waterproofing, in particular to a through-wall waterproof sleeve structure of an underground structure and a construction method of the through-wall waterproof sleeve structure. The wall bushing comprises a bushing body and an outer coating, the outer coating is arranged on the outer surface of the bushing body, and the outer coating makes contact with concrete of a concrete wall and forms a sealing layer. Plug bolts are arranged in the two ends of the casing pipe body respectively, the threads of the plug bolts are coated with sealant, the plug bolts are matched with the internal threads of the casing pipe body, the plug bolts and the casing pipe body are tightly sealed through the sealant, and the portion, between the two plug bolts, of the casing pipe body is filled with cement waterproof mortar. According to the through-wall waterproof sleeve structure, the construction cost is low, the construction cost is reduced, the through-wall sleeve and the plug bolt are used in cooperation, the problem that the middle section of a traditional three-section opposite-pull screw cannot be detached is solved, secondary utilization of materials is achieved, and the bearing capacity and safety of the whole structure are improved.

Description

Technical Field

[0001] This application relates to the field of waterproofing technology in building construction, specifically to a through-wall waterproof sleeve structure suitable for formwork construction of underground structural walls, and the corresponding construction method for the structure. Background Technology

[0002] In the construction of underground structural walls, tie rod through-wall sleeves are core components that ensure the stability and waterproofing performance of the wall structure. Currently, in the formwork construction of underground structural walls, the mainstream tie rod through-wall sleeves are mainly divided into two categories: ordinary through-wall sleeves and three-section tie rods with water-stop rings.

[0003] However, existing technologies have significant drawbacks: ordinary through-wall sleeves have weak waterproofing performance, poor adhesion between their outer wall and the concrete surface easily leads to water seepage, and the smooth inner wall of the sleeve makes clogging difficult, further exacerbating the risk of leakage; three-section tie rods are costly, directly increasing project costs, and the middle section cannot be removed, preventing reuse and causing serious resource waste; furthermore, the three-section tie rods use threaded connections between sections, and frequent disassembly can easily damage the threads, reducing the load-bearing capacity of the tie rods. If damaged rods are not replaced in time, it can cause safety hazards, even leading to wall bursting, affecting project quality and construction safety, and causing additional cost losses. Therefore, there is an urgent need to develop a simple, cost-effective, reusable, and reliable through-wall waterproof sleeve structure and supporting construction method for underground structure wall formwork construction. Summary of the Invention

[0004] In view of the technical defects of the existing three-section tie rods, such as high cost, waste of resources due to the inability to remove the middle section, easy damage to the threaded connection affecting the load-bearing capacity, and poor waterproofing effect of ordinary through-wall sleeves, this application provides the following technical solution.

[0005] This application provides a waterproof sleeve structure for underground structures that penetrates walls, including a through-wall sleeve and a plug bolt;

[0006] The through-wall sleeve includes a sleeve body and an outer coating. The outer coating is disposed on the outer surface of the sleeve body, and the outer coating comes into contact with the concrete of the concrete wall and undergoes an adhesive reaction to form a sealing layer.

[0007] The casing body is provided with internal threads, and plug bolts are respectively provided inside both ends of the casing body. The threads of the plug bolts are coated with sealant. The plug bolts mate with the internal threads of the casing body, and the sealant makes the two tightly sealed. The casing body located between the two plug bolts is filled with cement waterproof mortar.

[0008] Preferably, the sleeve body is made of PVC, UPVC or PE material.

[0009] Preferably, the sealant is a liquid raw material tape.

[0010] Preferably, the outer coating is self-adhesive butyl rubber or polymer self-adhesive.

[0011] Preferably, the outer wall of the sleeve body and the outer coating are bonded together as an integral structure through a hot-melt composite process or a chemical cross-linking treatment.

[0012] Preferably, the plug bolt is made of the same material as the sleeve body.

[0013] Preferably, the plug bolts located at both ends of the sleeve body are a first plug bolt and a second plug bolt, respectively;

[0014] The first plug bolt is located on the water-facing side of the through-wall sleeve, and the second plug bolt is located on the non-water-facing side of the through-wall sleeve. The length of the first plug bolt extending into the through-wall sleeve is greater than the length of the second plug bolt extending into the through-wall sleeve.

[0015] Preferably, the first plug bolt penetrates the through-wall sleeve for a length of not less than 70mm, and the second plug bolt penetrates the through-wall sleeve for a length of not less than 50mm.

[0016] Preferably, the cement waterproof mortar is a micro-expansion cement waterproof mortar.

[0017] In addition, this application also provides a construction method for the above-mentioned underground structure through-wall waterproof sleeve structure, including the following steps:

[0018] A through-wall sleeve is inserted into the wall formwork, with both ends protruding from the outside of the wall formwork for subsequent installation of tie rods to fix the wall formwork; wherein, the through-wall sleeve includes a sleeve body and an outer coating.

[0019] A tie rod is installed inside the through-wall sleeve;

[0020] Concrete is poured to form a concrete wall, and during the concrete construction process, the outer coating of the through-wall sleeve reacts with the concrete to form a sealing layer.

[0021] After the concrete wall reaches the design strength requirements, remove the tie rods and wall formwork;

[0022] Install plug bolts at both ends of the wall sleeve. Specifically, first install the plug bolts on the water-facing side. After installation, fill the wall sleeve with cement waterproof mortar from the non-water-facing side. After the filling is compacted, install the plug bolts on the non-water-facing side. When installing the plug bolts, first apply sealant to the threaded part, and then screw them into the wall sleeve until the designed depth is reached.

[0023] Compared with the prior art, this application has at least one of the following advantages or beneficial effects:

[0024] 1. Compared with the three-section tie rod, this application has a lower structural cost, and the tie rod can be completely removed for reuse, avoiding resource waste and significantly reducing project cost; at the same time, it avoids the problem of easy damage to the threaded connection between the three-section tie rod, and improves the structural bearing capacity and construction safety.

[0025] 2. The outer coating of the wall sleeve in this application reacts with the concrete to form a sealing layer, which effectively solves the water seepage problem caused by the poor bonding between the traditional sleeve and the concrete.

[0026] 3. The wall sleeve and plug bolts in this application are used together. Through the combination of threaded connection and sealant, the two ends of the sleeve are tightly sealed, eliminating the risk of water leakage at the ends.

[0027] 4. This application fills the inner cavity of the through-wall sleeve with micro-expansion cement waterproof mortar, which together with the two plug bolts forms a triple waterproof barrier, further enhancing the overall waterproof effect and effectively preventing leakage.

[0028] 5. The internal thread on the inner wall of the through-wall sleeve of this application precisely matches the plug bolt coated with liquid PTFE tape, further improving the sealing performance and preventing wall leakage.

[0029] 6. This application integrates the waterproofing advantages of the three-section tie rod with the convenience of the traditional through-wall sleeve tie rod. It has a simple structure, high construction efficiency, and stable water-blocking and waterproofing effect, achieving a dual improvement in safety and economy. Attached Figure Description

[0030] This application, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. The same reference numerals denote the same parts throughout the drawings. The drawings are not drawn to scale; their purpose is to illustrate the main points of the application.

[0031] Figure 1 This is a cross-sectional schematic diagram of the underground structure through-wall waterproof sleeve structure in Embodiment 1 of this application;

[0032] Figure 2This is a cross-sectional schematic diagram of the underground structure through-wall waterproof sleeve structure with tie rods inserted in Embodiment 2 of this application;

[0033] The following are the labels in the diagram: 1. Through-wall sleeve; 1-1. Sleeve body; 1-2. Outer coating; 2. Plug bolt; 3. Filling cement waterproof mortar; 4. Tie rod; 5. Concrete wall. Detailed Implementation

[0034] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings and embodiments. It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0035] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, unless otherwise expressly indicated by this application, the singular form is also intended to include the plural form. It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] Example 1

[0037] like Figure 1 As shown, this embodiment provides a structure for a waterproof sleeve through a wall in an underground structure. The structure includes a sleeve 1 and plug bolts 2. The sleeve includes a sleeve body 1-1 and an outer coating 1-2. The outer coating 1-2 is applied to the outer surface of the sleeve body 1-1 and contacts the concrete in the concrete wall 5, forming a sealing layer through an adhesive reaction. The inner wall of the sleeve body 1-1 has internal threads. Plug bolts 2 are respectively installed at both ends of the sleeve body 1-1. The threads of the plug bolts 2 are coated with sealant, which mates with the internal threads of the sleeve body 1-1, and the sealant ensures a tight seal. Specifically, the sealant is liquid raw material tape. The sleeve body 1-1 between the two plug bolts 2 is filled with cement waterproof mortar 3, which is a micro-expansion cement waterproof mortar. The sleeve body 1-1 of the sleeve 1 is made of PVC, UPVC, or PE material. The outer wall of the sleeve body 1-1 and the outer coating 1-2 are bonded together as an integral structure through a hot-melt composite process or chemical cross-linking treatment.

[0038] The plug bolts 2 located at both ends of the sleeve body 1-1 are the first plug bolt and the second plug bolt, respectively. The plug bolts 2 are made of the same material as the sleeve body 1-1. The first plug bolt is set on the water-facing side of the through-wall sleeve 1 and penetrates the through-wall sleeve 1 for a length of not less than 70mm. The second plug bolt is set on the non-water-facing side of the through-wall sleeve 1 and penetrates the through-wall sleeve 1 for a length of not less than 50mm.

[0039] Specifically, such as Figures 1-2 As shown, the through-wall sleeve 1 provided in this embodiment consists of a sleeve body 1-1 and an outer coating 1-2. The through-wall sleeve 1 is manufactured as a complete product in the factory, and its sleeve body 1-1 is made of PVC material. The inner wall of the sleeve body 1-1 of the through-wall sleeve 1 is provided with threads for connection with the plug bolt 2. The length of the through-wall sleeve 1 is determined according to the wall thickness, usually 300mm to 600mm, and the outer diameter is 20mm to 25mm. The wall thickness of the through-wall sleeve 1 is 2.5mm to 3mm to ensure sufficient strength to withstand the pressure during concrete pouring. The sleeve body 1-1 of the through-wall sleeve 1 is provided with internal threads, the thread specification is M14, the thread pitch is 2mm, and the thread depth is 1mm.

[0040] The outer coating 1-2 is made of a non-asphalt-based polymer self-adhesive layer plus a weather-resistant layer, with a thickness of 1mm, and is evenly coated on the outer surface of the sleeve body 1-1. The outer coating 1-2 is tightly bonded to the sleeve body 1-1. During the pouring of the concrete wall 5, the outer coating 1-2 can react with the concrete to form an integral structure, ensuring that there are no gaps between the through-wall sleeve 1 and the concrete wall 4, thereby achieving a waterproof effect.

[0041] The plug bolt 2 is also made of PVC material, the same material as the through-wall sleeve 1. The plug bolt 2 is matched with the through-wall sleeve 1, and its length is 50mm to 70mm. The head of the plug bolt 2 is cross-shaped, making it easy to tighten or loosen with a screwdriver. The threaded portion of the plug bolt 2 is 50mm to 70mm long, and its thread specification matches the internal thread of the sleeve body 1-1 of the through-wall sleeve 1. During installation, liquid PTFE tape is first applied to the threaded portion of the plug bolt 2, and then it is screwed into the thread of the sleeve body 1-1 of the through-wall sleeve 1 to form a reliable waterproof seal.

[0042] The filling cement waterproof mortar 3 uses micro-expansion cement waterproof mortar. After the concrete wall 5 is constructed and the tie rods 4 are removed, and the plug bolts on the water-facing side are installed, the filling cement waterproof mortar 3 is filled from the non-water-facing side into the gap between the first plug bolt 2 and the second plug bolt 2 in the through sleeve 1. After filling and compacting, the second plug bolt 2 is then installed.

[0043] Example 2

[0044] This invention also discloses a construction method for a waterproof sleeve structure for underground structures that penetrates walls, comprising the following steps:

[0045] Step S1: Insert the through-wall sleeve 1 into the wall formwork, with both ends protruding from the outside of the wall formwork, for subsequent installation of the tie rod 4 to fix the wall formwork. Figure 2 As shown; wherein, the through-wall sleeve 1 includes a sleeve body 1-1 and an outer coating 1-2.

[0046] Step S2: Insert tie rod 4 into the through-wall sleeve 1.

[0047] Step S3: Pour concrete to form concrete wall 5, and during the concrete construction process, the outer coating 1-2 of the through sleeve 1 reacts with the concrete to form a sealing layer.

[0048] Step S4: After the concrete wall 5 reaches the design strength requirement, remove the tie rod 4 and the wall formwork; at this time, both ends of the through sleeve 1 are exposed on the wall surface.

[0049] Step S5, as follows Figure 1 As shown, plug bolts 2 are installed at both ends of the through-wall sleeve 1. Specifically, the first plug bolt on the water-facing side is installed first. After installation, cement waterproof mortar 3 is filled into the through-wall sleeve 1 from the non-water-facing side. After the filling is compacted, the second plug bolt on the non-water-facing side is installed. When installing the plug bolt 2, liquid PTFE tape is first applied to its threaded portion, and then it is screwed into the through-wall sleeve 1 until the designed depth is reached. The liquid PTFE tape forms a reliable sealing layer between the plug bolt 2 and the through-wall sleeve 1 to prevent water penetration.

[0050] The advantages of this through-wall waterproof sleeve structure are:

[0051] The wall sleeve 1, sleeve body 1-1 and plug bolt 2 are both made of PVC material. The outer coating 1-2 of the wall sleeve 1 is made of non-asphalt polymer self-adhesive layer plus weather-resistant layer material, which has good corrosion resistance, waterproof performance and concrete bonding performance, and is suitable for the long-term waterproof requirements of underground structures.

[0052] The plug bolt 2 is connected to the through sleeve 1 by threads and sealed with liquid PTFE tape to form a double waterproof guarantee and ensure the waterproof performance of the underground structure.

[0053] The gap between the first plug bolt 2 and the second plug bolt 2 of the through-wall sleeve 1 is filled with micro-expansion cement waterproof mortar to further enhance the waterproof performance.

[0054] This through-wall waterproof sleeve structure is easy to install, easy to dismantle, and can be reused, reducing construction costs and improving construction efficiency.

[0055] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the substantive content of this application and will not be elaborated here.

[0056] The preferred embodiments of this application have been described above. It should be understood that this application is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of this application using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solutions of this application. This does not affect the substantive content of this application. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this application without departing from the content of the technical solutions of this application still fall within the protection scope of the technical solutions of this application.

Claims

1. A waterproof sleeve structure for underground structures that penetrates walls, characterized in that, This includes through-wall sleeves and plug bolts; The through-wall sleeve includes a sleeve body and an outer coating. The outer coating is disposed on the outer surface of the sleeve body, and the outer coating comes into contact with the concrete of the concrete wall and undergoes an adhesive reaction to form a sealing layer. The casing body is provided with internal threads, and plug bolts are respectively provided inside both ends of the casing body. The threads of the plug bolts are coated with sealant. The plug bolts mate with the internal threads of the casing body, and the sealant makes the two tightly sealed. The casing body located between the two plug bolts is filled with cement waterproof mortar.

2. The underground structure through-wall waterproof sleeve structure as described in claim 1, characterized in that, The sleeve body is made of PVC, UPVC or PE material.

3. The underground structure through-wall waterproof sleeve structure as described in claim 1, characterized in that, The sealant is a liquid raw material tape.

4. The underground structure through-wall waterproof sleeve structure as described in claim 1, characterized in that, The outer coating is self-adhesive butyl rubber or polymer self-adhesive.

5. The underground structure through-wall waterproof sleeve structure as described in claim 1, characterized in that, The outer wall of the sleeve body and the outer coating are bonded together as an integral structure through a hot-melt composite process or a chemical cross-linking treatment.

6. The underground structure through-wall waterproof sleeve structure as described in claim 1, characterized in that, The plug bolt is made of the same material as the sleeve body.

7. The underground structure through-wall waterproof sleeve structure as described in claim 1, characterized in that, The plug bolts located at both ends of the sleeve body are the first plug bolt and the second plug bolt, respectively; The first plug bolt is located on the water-facing side of the through-wall sleeve, and the second plug bolt is located on the non-water-facing side of the through-wall sleeve. The length of the first plug bolt extending into the through-wall sleeve is greater than the length of the second plug bolt extending into the through-wall sleeve.

8. The underground structure through-wall waterproof sleeve structure as described in claim 7, characterized in that, The first plug bolt penetrates the through-wall sleeve for a length of not less than 70mm, and the second plug bolt penetrates the through-wall sleeve for a length of not less than 50mm.

9. The underground structure through-wall waterproof sleeve structure as described in claim 1, characterized in that, The cement waterproof mortar is a micro-expansion cement waterproof mortar.

10. A construction method for an underground structure through-wall waterproof sleeve structure as described in any one of claims 1 to 9, characterized in that, Includes the following steps: A through-wall sleeve is inserted into the wall formwork, with both ends protruding from the outside of the wall formwork for subsequent installation of tie rods to fix the wall formwork; wherein, the through-wall sleeve includes a sleeve body and an outer coating. A tie rod is installed inside the through-wall sleeve; Concrete is poured to form a concrete wall, and during the concrete construction process, the outer coating of the through-wall sleeve reacts with the concrete to form a sealing layer. After the concrete wall reaches the design strength requirements, remove the tie rods and wall formwork; Install plug bolts at both ends of the wall sleeve. Specifically, first install the plug bolts on the water-facing side. After installation, fill the wall sleeve with cement waterproof mortar from the non-water-facing side. After the filling is compacted, install the plug bolts on the non-water-facing side. When installing the plug bolts, first apply sealant to the threaded part, and then screw them into the wall sleeve until the designed depth is reached.

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