Underground structure wall bushing and use method thereof

Abstract

The invention provides an underground structure wall bushing which comprises a bushing wall, an inner coating and an outer coating, the inner coating is arranged on the inner surface of the bushing wall, the outer coating is arranged on the outer surface of the bushing wall, the inner coating is in contact with cement mortar and forms a bonding reaction, and the outer coating is in contact with concrete and forms a bonding reaction. The underground structure wall bushing is simple in structure and convenient to construct; the inner coating and cement mortar are subjected to a bonding reaction, and the outer coating and concrete in the concrete wall are subjected to a bonding reaction, so that a whole is formed, and a good waterproof effect is achieved; and the safety is good, and the potential safety hazard and the wall body mold explosion risk caused by screw thread damage of a traditional three-section type opposite-pull water stop screw rod are avoided.

Description

Technical Field

[0001] The present application relates to the field of building construction waterproofing, and in particular to an underground structure wall sleeve and a method for using the same. Background Art

[0002] In underground structure wall construction, tie rods are crucial for formwork stability, while wall sleeves are crucial for ensuring wall waterproofing after tie rod installation and removal. Currently, commonly used waterproofing methods for underground structure wall tie rod construction include three-stage tie rods, pre-buried wall sleeve waterproofing devices, and other methods.

[0003] Common problems with existing technologies include: the high cost of three-section tie-dock waterstops; the middle section of the tie-dock cannot be removed from the concrete wall, making it impossible to reuse, resulting in a waste of resources; the three-section tie-dock waterstops are connected by threads, and frequent removal can damage the threads, affecting the load-bearing capacity of the tie-docks; and failure to promptly replace damaged screws can pose safety hazards and even cause wall mold explosions, impacting project quality and safety and increasing construction costs. Furthermore, the poor adhesion between existing wall sleeves and concrete walls can easily create leakage channels, compromising the overall waterproofing of underground structures. Summary of the Invention

[0004] This application provides the following technical solutions to address the defects of the existing three-section pull-to-pull water-stop screws, such as high cost, the middle section cannot be removed resulting in waste of resources, the threaded connection is easily damaged affecting the bearing capacity, and the waterproof effect is poor.

[0005] The present application provides an underground structure wall sleeve, which includes a pipe wall, an inner coating and an outer coating. The inner coating is arranged on the inner surface of the pipe wall, and the outer coating is arranged on the outer surface of the pipe wall. The inner coating contacts with cement mortar and forms a bonding reaction, and the outer coating contacts with concrete and forms a bonding reaction.

[0006] In one embodiment, the pipe wall is made of PVC, UPVC or PE.

[0007] In one embodiment, the pipe wall, the inner coating layer and the outer coating layer are combined into an integral structure through a hot melt lamination process or a chemical cross-linking process.

[0008] In one embodiment, the inner coating is made of self-adhesive butyl rubber or non-asphalt polymer self-adhesive layer material.

[0009] In one embodiment, the inner coating has a matching gap with the tension screw rod passing through the wall sleeve, and reacts with the cement mortar after the tension screw rod is removed.

[0010] In one embodiment, the outer coating is made of self-adhesive butyl rubber or non-asphalt polymer self-adhesive layer material.

[0011] In one embodiment, the cement mortar adopts ordinary cement mortar or slightly expansive cement mortar, and the strength grade of the cement mortar is not lower than M10.

[0012] In one embodiment, the inner diameter of the wall sleeve is 2 mm larger than the outer diameter of the matching tension screw.

[0013] The present application also provides a method for using the above-mentioned wall sleeve, comprising the following steps: installing the wall sleeve on the template, ensuring that its position is consistent with the design requirements; inserting the tension screw and fixing the template;

[0014] When pouring concrete, the outer coating contacts the concrete and undergoes a bonding reaction. After the concrete construction is completed, the formwork and tension screws are removed, and the wall sleeve and the concrete form an integral structure. The wall sleeve is filled with cement mortar, and the cement mortar and the inner coating undergo a bonding reaction to form an integral structure.

[0015] The beneficial effects of the present application are: compared with the existing technology, the present application has a simple structure and is easy to construct; it has good water-blocking and waterproof effects, the inner coating reacts with the cement mortar, and the outer coating reacts with the concrete in the concrete wall to form a whole, achieving a good waterproof effect; it has good safety, avoiding the safety hazards and wall mold explosion risks caused by damage to the threads of the traditional three-stage tension water-stop screws; it has good economy, is lower in cost than the three-stage tension water-stop screws, and the tension screws can be completely dismantled for secondary use, avoiding waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present application and its features, features, configurations, and advantages will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings. Like reference numerals indicate like parts throughout the drawings. The drawings are not drawn to scale, emphasis being placed on illustrating the subject matter of the present application.

[0017] Figure 1 Schematic cross-sectional view of an underground structure wall casing including a tension screw in one embodiment of the present application;

[0018] Figure 2 Schematic cross-sectional view of an underground structure wall casing including cement mortar in one embodiment of the present application;

[0019] Figure 3 Schematic diagram of a cross section of an underground structure wall casing in one embodiment of the present application;

[0020] Numbers in the figure: 1. Self-adhesive wall sleeve; 1-1. Pipe wall; 1-2. Inner coating; 1-3. Outer coating; 2. Cement mortar; 3. Tension screw; 4. Concrete wall. DETAILED DESCRIPTION

[0021] The technical solutions of the present application will be described clearly and completely below through examples with reference to the accompanying drawings. It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by those of ordinary skill in the art to which this application belongs.

[0022] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless otherwise expressly specified in the present application, the singular form is also intended to include the plural form, and it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0023] Example 1

[0024] like Figure 1-Figure 3 As shown, this embodiment provides an underground structure wall sleeve structure, including a self-adhesive wall sleeve 1 and cement mortar 2. The self-adhesive wall sleeve 1 consists of a pipe wall 1-1, an inner coating 1-2 and an outer coating 1-3, and is produced as an integral finished product in a factory.

[0025] Tube wall 1-1 is made of PVC and is 3mm thick, providing sufficient strength and rigidity to withstand the pressure during concrete pouring. Tube wall 1-1 has an inner diameter of 40mm and an outer diameter of 46mm. Its length is determined by the thickness of the concrete wall 4 and is 300mm in this embodiment. The inner diameter of tube wall 1-1 is designed to ensure smooth passage of the tie rod 3, which has a diameter of 36mm. This allows for a 4mm gap between the inner diameter and the tie rod 3, facilitating construction operations.

[0026] Inner coating 1-2, made of self-adhesive butyl rubber with a thickness of 1.5 mm, is evenly applied to the inner surface of pipe wall 1-1. Self-adhesive butyl rubber has excellent bonding and waterproof properties, allowing it to tightly bond to pipe wall 1-1, forming an integrated structure. The surface of inner coating 1-2 is highly viscous, creating a gap between inner coating 1-2 and the tie rods 3 passing through the wall bushing. After the tie rods 3 are removed, the cement mortar 2 applied to the inner coating 1-2 forms a bond, forming a monolithic structure that effectively prevents moisture penetration.

[0027] Outer coating 1-3, also made of self-adhesive butyl rubber and 2mm thick, is evenly applied to the outer surface of pipe wall 1-1. This ensures a tight bond with pipe wall 1-1. During the pouring of concrete wall 4, outer coating 1-3 bonds with the concrete, forming a monolithic structure and ensuring no gaps between the casing and concrete wall 4, thus achieving a waterproof effect.

[0028] Cement mortar 2 uses ordinary cement mortar, made from No. 425 ordinary Portland cement and medium sand in a ratio of 1:2.5, for a water-cement ratio of 0.5. After the concrete wall 4 is constructed and the tie screws 3 are removed, the self-adhesive wall sleeve 1 is completely filled with cement mortar 2. The mortar is filled in layers, each layer approximately 50 mm thick. The mortar is thoroughly compacted with a tamping rod to ensure full contact and adhesion between the cement mortar 2 and the inner coating 1-2.

[0029] The self-adhesive wall sleeve 1 in this embodiment forms an integral structure with the cement mortar 2 and concrete wall 4 through the inner coating 1-2 and outer coating 1-3, effectively preventing moisture penetration and resolving the leakage problem of conventional wall sleeves. Furthermore, the self-adhesive wall sleeve 1 is factory-produced as a complete product, simplifying installation and ensuring reliable quality, significantly improving construction efficiency and waterproofing effectiveness.

[0030] Example 2

[0031] This embodiment also provides an underground structure wall sleeve structure, including a self-adhesive wall sleeve 1 and cement mortar 2. The self-adhesive wall sleeve 1 consists of a pipe wall 1-1, an inner coating 1-2 and an outer coating 1-3, and is produced as an integral finished product in a factory.

[0032] Tube wall 1-1 is made of UPVC with a thickness of 3.5mm, offering greater strength and rigidity, capable of withstanding greater concrete pouring pressure. Tube wall 1-1 has an inner diameter of 45mm, an outer diameter of 52mm, and a length of 350mm. The inner diameter of tube wall 1-1 is designed to ensure smooth passage of the tensioning screw 3, which has a diameter of 40mm. This allows for a 5mm gap between the inner diameter and the tensioning screw 3, facilitating construction operations.

[0033] The inner coating 1-2 is a 2mm thick, 2mm thick, non-asphalt polymer self-adhesive layer combined with a weather-resistant coating. It is evenly applied to the inner surface of the pipe wall 1-1. The non-asphalt polymer self-adhesive layer offers excellent bonding, waterproofing, and durability, allowing it to tightly bond with the pipe wall 1-1, forming an integrated structure. The surface of the inner coating 1-2 exhibits high adhesion. After the tensioning screws 3 are removed, the cement mortar 2 applied will bond to the inner coating 1-2, forming a monolithic structure that effectively prevents moisture penetration.

[0034] The outer coating 1-3, also made of a non-asphalt polymer self-adhesive layer and a weather-resistant layer, is 2.5 mm thick and evenly applied to the outer surface of the pipe wall 1-1. The outer coating 1-3 is tightly bonded to the pipe wall 1-1. During the pouring of the concrete wall 4, the outer coating 1-3 reacts with the concrete to form a monolithic structure, ensuring that no gaps form between the casing and the concrete wall 4, thus achieving a waterproof effect.

[0035] Cement mortar 2 utilizes a slightly expansive cement mortar, composed of No. 425 ordinary Portland cement, medium sand, and an expansive agent in a ratio of 1:2:0.05, for a water-cement ratio of 0.48. This slightly expansive mortar exhibits a moderate expansion property, allowing it to better fill the interior of the self-adhesive wall sleeve 1 and enhance waterproofing. After the concrete wall 4 is constructed and the tie screws 3 are removed, the self-adhesive wall sleeve 1 is completely filled with the slightly expansive cement mortar 2. This filling process is performed using a single-shot grouting method, using grouting equipment to inject the slightly expansive cement mortar 2 into the self-adhesive wall sleeve 1, ensuring a dense filling.

[0036] The self-adhesive wall sleeve 1 in this embodiment forms an integral structure with the micro-expanding cement mortar 2 and concrete wall 4 through the inner coating 1-2 and outer coating 1-3, effectively preventing water penetration and resolving the leakage problem of traditional wall sleeves. Furthermore, the use of a non-asphalt polymer self-adhesive layer, a weather-resistant layer, and the micro-expanding cement mortar further enhances waterproofing and durability.

[0037] Example 3

[0038] This embodiment also provides an underground structure wall sleeve structure, including a self-adhesive wall sleeve 1 and cement mortar 2. The self-adhesive wall sleeve 1 consists of a pipe wall 1-1, an inner coating 1-2 and an outer coating 1-3, and is produced as an integral finished product in a factory.

[0039] Pipe wall 1-1 is made of PE with a thickness of 4mm, offering excellent flexibility and corrosion resistance, making it suitable for a variety of complex environments. It has an inner diameter of 50mm, an outer diameter of 58mm, and a length of 400mm. The inner diameter of pipe wall 1-1 is designed to ensure smooth passage of the tie rod 3, which has a diameter of 45mm. This allows for a 5mm gap between the inner diameter and the tie rod 3, facilitating installation.

[0040] Inner coating 1-2 is made of self-adhesive butyl rubber with a thickness of 2 mm and is evenly applied to the inner surface of pipe wall 1-1. Self-adhesive butyl rubber has excellent bonding and waterproof properties, allowing it to tightly bond with pipe wall 1-1 to form an integrated structure. The surface of inner coating 1-2 is highly viscous. After the tensioning screws 3 are removed, the cement mortar 2 applied will bond to the inner coating 1-2, forming a monolithic structure that effectively prevents moisture penetration.

[0041] The outer coating 1-3, made of a non-asphalt polymer self-adhesive layer and a weather-resistant layer, is evenly applied to the outer surface of the pipe wall 1-1, with a thickness of 3mm. The outer coating 1-3 is tightly bonded to the pipe wall 1-1. During the pouring of the concrete wall 4, the outer coating 1-3 reacts with the concrete to form a monolithic structure, ensuring that no gaps form between the casing and the concrete wall 4, thus achieving a waterproof effect.

[0042] Cement mortar 2 utilizes a mixture of ordinary cement mortar and micro-expansive cement mortar, formulated with No. 425 ordinary Portland cement, medium sand, and an expansive agent in a ratio of 1:2.2:0.03, resulting in a water-cement ratio of 0.45. This mixture combines the stability of ordinary cement mortar with the expansion properties of micro-expansive cement mortar, enabling it to better fill the interior of the self-adhesive wall sleeve 1 and enhance waterproofing. After the concrete wall 4 is constructed and the tension screws 3 are removed, the self-adhesive wall sleeve 1 is completely filled with the mixed cement mortar 2. This filling process utilizes a combination of layered filling and vibration, with each layer approximately 40 mm thick. Vibration is then applied with a vibrating rod to ensure full contact and adhesion between the cement mortar 2 and the inner coating 1-2.

[0043] The self-adhesive wall sleeve 1 in this embodiment forms an integral structure with the cement mortar 2 and concrete wall 4 through the inner coating 1-2 and outer coating 1-3, effectively preventing water penetration and resolving the leakage problem of conventional wall sleeves. Furthermore, the use of inner coatings 1-2 and outer coatings 1-3 made of different materials, along with the mixed cement mortar 2, further enhances waterproofing and adaptability.

[0044] Example 4

[0045] This embodiment also provides a method for using the above-mentioned wall sleeve, including the following steps: installing the wall sleeve on the formwork to ensure that its position is consistent with the design requirements; inserting the tension screw and fixing the formwork; pouring concrete, and the outer coating contacts the concrete and undergoes a bonding reaction; after the concrete construction is completed, removing the formwork and the tension screw, and the wall sleeve and the concrete form an integral structure; filling the wall sleeve with cement mortar, and the cement mortar and the inner coating undergo a bonding reaction to form an integral structure.

[0046] During construction, the self-adhesive wall sleeve 1 is first installed on the formwork, ensuring its position is consistent with the design requirements. The tension screws 3 are then inserted and the formwork secured. During concrete pouring, the outer coating 1-3 comes into contact with the concrete and forms a bonding reaction. After the concrete wall 4 is completed, the formwork and tension screws 3 are removed. The self-adhesive wall sleeve 1 now forms an integral structure with the concrete wall 4. Finally, the self-adhesive wall sleeve 1 is filled with mixed cement mortar 2, which bonds to the inner coating 1-2 to form an integral structure, completing the waterproofing process.

[0047] Compared with the existing technology, the present application has a simple structure and is easy to construct; it has good water-blocking and waterproof effects, the inner coating reacts with the cement mortar, and the outer coating reacts with the concrete in the concrete wall to form a whole, achieving a good waterproof effect; it has good safety, avoiding the safety hazards and wall mold explosion risks caused by damage to the threads of the traditional three-stage tension waterstop screws; it has good economic efficiency, is lower in cost than the three-stage tension waterstop screws, and the tension screws can be completely dismantled for secondary use, avoiding waste of resources.

[0048] Those skilled in the art should understand that they can implement variations based on the prior art and the above embodiments, which are not described in detail here. Such variations do not affect the substantive content of this application and are not described in detail here.

[0049] The above describes the preferred embodiments of the present application. It should be understood that the present application is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-mentioned disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present application without departing from the scope of the technical solutions of the present application, or modify them into equivalent embodiments with equivalent changes, which does not affect the substantive content of the present application. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application that do not depart from the content of the technical solutions of the present application are still within the scope of protection of the technical solutions of the present application.

Claims

1. An underground structure wall casing, characterized in that: The wall sleeve includes a pipe wall, an inner coating and an outer coating. The inner coating is arranged on the inner surface of the pipe wall, and the outer coating is arranged on the outer surface of the pipe wall. The inner coating contacts the cement mortar and forms a bonding reaction, and the outer coating contacts the concrete and forms a bonding reaction.

2. The wall bushing according to claim 1, characterized in that: The pipe wall is made of PVC, UPVC or PE.

3. The wall bushing according to claim 1, wherein: The tube wall, the inner coating layer and the outer coating layer are combined into an integral structure through a hot melt composite process or a chemical cross-linking process.

4. The wall bushing according to claim 1, wherein: The inner coating is made of self-adhesive butyl rubber or non-asphalt polymer self-adhesive layer material.

5. The wall bushing according to claim 4, characterized in that: The inner coating has a matching gap with the tension screw rod passing through the wall sleeve, and reacts with the cement mortar after the tension screw rod is removed.

6. The wall bushing according to claim 1, characterized in that: The outer coating is made of self-adhesive butyl rubber or non-asphalt polymer self-adhesive layer material.

7. The wall bushing according to claim 1, characterized in that: The cement mortar adopts ordinary cement mortar or slightly expansive cement mortar, and the strength grade of the cement mortar is not lower than M10.

8. The wall bushing according to claim 1, wherein: The inner diameter of the wall sleeve is 2 mm larger than the outer diameter of the matching tension screw.

9. A method for using the wall bushing according to claim 1, characterized in that: The steps include: Install the wall bushing on the template, ensuring that its position is consistent with the design requirements; Insert the tension screws and fix the formwork; pouring concrete, wherein the outer coating contacts the concrete and undergoes a bonding reaction; After the concrete construction is completed, the formwork and the tension screws are removed, and the wall sleeve and the concrete form an integral structure; The wall sleeve is filled with cement mortar, and the cement mortar reacts with the inner coating to form an integral structure.

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