Underground engineering construction joint waterproof structure
By setting up a waterproof structure with support formwork and flexible high-bonding waterproof layer at the underground construction joints, the problem of water leakage in the construction joints is solved, and the rapid construction joints and good sealing and waterproofing effect are achieved.
Patent Information
- Application Number
- CN202421829813.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-30
AI Technical Summary
There is a problem of water leakage at the underground construction joints, especially at the deformation joints and construction joints. If the existing technology encounters water expansion water stop strips and grouting pipes, the structure of the existing technology is poor, and there are defects in failure during settlement or cracks.
The waterproof structure includes concrete blocks, support formwork and flexible high bond waterproof layer. By setting up support formwork and flexible high bond waterproof layer at the construction joints of the concrete block, the rapid construction joints and good sealing and waterproofing are achieved.
It realizes effective waterproofing of construction joints, avoids water leakage problems, and enhances the waterproofing performance and service life of underground projects.
Smart Images
Figure CN222936058U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of waterproof structures, and particularly relates to a waterproof structure for construction joints of underground projects. Background Technique
[0002] Underground projects refer to underground civil engineering works constructed for the development and utilization of underground space resources deep below the ground surface, including highway tunnels, urban underground roads, subways, underground pedestrian passages, utility tunnels, underground houses, underground structures, etc. Among them, a construction joint refers to a joint formed between previously and subsequently poured concrete during the concrete pouring process due to design requirements or construction needs for segmented pouring. Leakage through the gap is a weak link in the waterproof system of underground projects, especially at the positions of deformation joints and construction joints. If not properly treated, water seepage problems are likely to occur, affecting normal operation and service life.
[0003] Currently, for the construction joints connecting the subway appendages and the main body of underground projects, due to the inability to reserve waterstop belts, water-swelling waterstop strips and grouting pipes are generally used. When using water-swelling waterstop strips for waterproofing, it is inevitable in terms of structural principle that they react and expand with the water in the concrete in advance during concrete pouring. When settlement or cracks occur later, the water-swelling effect is lost. Although the requirements for joint construction are met, the actual on-site effect is not good, and there are still many defects. Content of the Utility Model
[0004] The purpose of the utility model is to provide a waterproof structure for construction joints of underground projects to solve the above problems existing in the prior art.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A waterproof structure for construction joints of underground projects includes a concrete block. A support formwork is horizontally arranged inside the concrete block. The support formwork includes two first side plates and a second side plate which are vertically and parallelly arranged. A horizontal support plate is connected between the first side plate and the second side plate. The main part of the horizontal support plate is perpendicularly arranged with respect to the first side plate and the second side plate respectively. One end of the horizontal support plate close to the second side plate is bent and connected to the upper end of the second side plate. One end of the horizontal support plate is connected to the lower section of the first side plate. The second side plate and the concrete block are anchored by anchor screws. A flexible high-bonding waterproof layer is formed on the support formwork, and both ends of the flexible high-bonding waterproof layer are embedded into the concrete block.
[0007] The working process and principle of the above structure are as follows:
[0008] During installation, first find the midpoint of the cross-section of the construction joint of the concrete block for scribing, and use an angle grinder for cutting. The width and depth of the groove shall not be less than 30 mm. After cutting, remove the cut part. After removal, the base cross-section is neat and there is no debris residue on the concrete end face. Anchor the second side plate on the side of the concrete block through anchor screws so that the horizontal support plate is in a horizontal state. Prepare a flexible high-bond waterproof layer on the support formwork. The shape space formed by the combination of the first side plate, the second side plate and the horizontal support plate facilitates the shaping and fixing of the flexible high-bond waterproof layer, and enables the flexible high-bond waterproof layer to be embedded into the concrete block, achieving the purpose of quickly constructing the waterproof structure of the construction joint. Moreover, the double cooperation of the support formwork and the flexible high-bond waterproof layer realizes good sealing and waterproofing of the construction joint.
[0009] Furthermore, an interface enhancement layer is provided between the side surface of the flexible high-bond waterproof layer and the concrete block.
[0010] The setting of the interface enhancement layer ensures the bonding performance between the flexible high-bond waterproof layer and the surface of the concrete block.
[0011] Furthermore, the first side plate, the second side plate and the horizontal support plate are integrally formed.
[0012] With this setting, the support effect of the support formwork can be ensured.
[0013] Furthermore, one end of the horizontal support plate is vertically bent downward and then horizontally bent outward and connected to the lower edge of the first side plate, and the other end of the horizontal support plate is inclined downward and bent and connected to the upper end of the second side plate.
[0014] The bending of both ends of the horizontal support plate in cooperation with the settings of the first side plate and the second side plate facilitates the adjustment of the shape of the flexible high-bond waterproof layer according to the shape of the deformation joint, making it more adaptable to the deformation joint. At the same time, it increases the contact area between the flexible high-bond waterproof layer and the support formwork, enhancing its fixing firmness.
[0015] Furthermore, the included angle between the second side plate and the end of the horizontal support plate is 150 degrees.
[0016] The included angle between the second side plate and the end of the horizontal support plate being 150 degrees facilitates more stable support.
[0017] Furthermore, the thickness of the flexible high-bond waterproof layer is not less than 10 mm.
[0018] With this setting, the waterproof effect of the flexible high-bond waterproof layer is ensured.
[0019] Furthermore, the upper surface of the flexible high-bond waterproof layer is concave downward.
[0020] With this setting, the stability of its surface is ensured.
[0021] Furthermore, a sand surface adhesive layer is provided between the upper surface of the flexible high-adhesion waterproof layer and the concrete block, and a butyl rubber adhesive layer is provided between the lower surface of the horizontal support plate and the concrete block.
[0022] This setting ensures the connectivity between the flexible high-adhesion waterproof layer and the concrete block, as well as the connection performance between the horizontal support plate and the concrete block.
[0023] Beneficial effects: When installing the present utility model, first find the midpoint of the cross-section of the construction joint of the concrete block and draw a line, then use an angle grinder to cut it. The width and depth of the groove shall not be less than 30 mm. After cutting, remove the cut part. After removal, the base cross-section is neat and there is no debris residue on the concrete end face. Anchor the second side plate to the side of the concrete block through anchor screws, so that the horizontal support plate is in a horizontal state. Prepare the flexible high-adhesion waterproof layer on the support formwork. The shape space formed by the combination of the first side plate, the second side plate and the horizontal support plate is convenient for shaping and fixing the flexible high-adhesion waterproof layer, and enables the flexible high-adhesion waterproof layer to be embedded into the concrete block, achieving the purpose of quickly constructing the waterproof structure of the construction joint. And the double cooperation of the support formwork and the flexible high-adhesion waterproof layer realizes good sealing and waterproofing of the construction joint. Adopt on-site production of flexible high-adhesion waterproof materials to anchor, bond and seal the concrete end face of the construction joint of underground projects. There is a support formwork at the bottom, and finally a waterproof and water-blocking layer is formed, which has wide practical application value. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a schematic diagram of the overall structure of the present utility model.
[0025] Reference numerals: 1, concrete block; 2, support formwork; 3, first side plate; 4, second side plate; 5, horizontal support plate; 6, anchor screw; 7, interface enhancement layer; 8, flexible high-adhesion waterproof layer; 9, sand surface adhesive layer; 10, butyl rubber adhesive layer. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the present utility model in combination with the drawings and the descriptions of the embodiments or the prior art. Obviously, the following descriptions of the structures of the drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. It should be noted here that the descriptions of these embodiment modes are used to help understand the present utility model, but do not constitute a limitation to the present utility model.
[0027] Embodiment:
[0028] As Figure 1As shown in the figure, this embodiment provides a waterproof structure for construction joints in underground engineering, which includes a concrete block 1. A support formwork 2 is horizontally arranged inside the concrete block 1. The support formwork 2 includes two first side plates 3 and second side plates 4 that are vertically arranged in parallel. A horizontal support plate 5 is connected between the first side plate 3 and the second side plate 4. The main part of the horizontal support plate 5 is perpendicularly arranged with the first side plate 3 and the second side plate 4 respectively. One end of the horizontal support plate 5 close to the second side plate 4 is bent and connected to the upper end of the second side plate 4, and one end of the horizontal support plate 5 is connected to the lower end of the first side plate 3; the second side plate 4 is anchored to the concrete block 1 through an anchor screw 6. A flexible high-bonding waterproof layer 8 is formed on the support formwork 2, and both ends of the flexible high-bonding waterproof layer 8 are embedded into the concrete block 1. The flexible high-bonding waterproof layer 8 uses flexible high-bonding waterproof materials. The flexible high-bonding waterproof materials include the following components in parts by weight: 60 - 80 parts of EVA resin, 180 - 200 parts of thermoplastic polyurethane elastomer, 5 - 8 parts of dispersion aid, 3 - 5 parts of defoaming agent, 10 - 15 parts of white carbon black, 2 - 4 parts of antioxidant, 1 - 1.5 parts of 4,4'-bipyridine, and 1.97 - 3.86 parts of dihalotetrafluorobenzene.
[0029] The working process and principle of the above structure are as follows:
[0030] During installation, first find the midpoint of the cross-section of the construction joint of the concrete block 1 for scribing, and use an angle grinder for cutting. The width and depth of the groove should be no less than 30 mm. After cutting, remove it. After removal, the base cross-section is neat and there is no debris residue on the concrete end face. Anchor the second side plate 4 to the side of the concrete block 1 through the anchor screw 6, so that the horizontal support plate 5 is in a horizontal state. Prepare a flexible high-bonding waterproof layer on the support formwork 2. The shape space formed by the combination of the first side plate 3, the second side plate 4 and the horizontal support plate 5 is convenient for the flexible high-bonding waterproof layer 8 to be shaped and fixed, and enables the flexible high-bonding waterproof layer 8 to be embedded into the concrete block 1, achieving the purpose of quickly constructing the waterproof structure for the construction joint. And the double cooperation of the support formwork 2 and the flexible high-bonding waterproof layer 8 realizes good sealing and waterproofing of the construction joint.
[0031] In another embodiment of the present utility model, as Figure 1 shown, an interface enhancement layer 7 is provided between the side surface of the flexible high-bonding waterproof layer 8 and the concrete block 1. The interface enhancement layer 7 uses an interface enhancer.
[0032] The setting of the interface enhancement layer 7 ensures the bonding performance between the flexible high-bonding waterproof layer 8 and the surface of the concrete block 1.
[0033] In another embodiment of the present utility model, as Figure 1 shown, the first side plate 3, the second side plate 4 and the horizontal support plate 5 are integrally formed.
[0034] With such a setting, the supporting effect of the supporting template 2 can be ensured.
[0035] In another embodiment of the present utility model, as Figure 1 shown, one end of the horizontal support plate 5 is vertically bent downward and then horizontally bent outward and connected to the lower edge of the first side plate 3, and the other end of the horizontal support plate 5 is inclined and bent downward and connected to the upper end of the second side plate 4.
[0036] The bending of both ends of the horizontal support plate 5 in cooperation with the settings of the first side plate 3 and the second side plate 4 facilitates adjusting the shape of the flexible high-bonding waterproof layer according to the shape of the deformation joint, making it more adaptable to the deformation joint. At the same time, it enhances the contact area between the flexible high-bonding waterproof layer 8 and the supporting template 2, enhancing its fixing firmness.
[0037] In another embodiment of the present utility model, as Figure 1 shown, the included angle between the second side plate 4 and the end of the horizontal support plate 5 is 150 degrees.
[0038] The included angle between the second side plate 4 and the end of the horizontal support plate 5 being 150 degrees facilitates more stable support.
[0039] In another embodiment of the present utility model, as Figure 1 shown, the thickness of the flexible high-bonding waterproof layer 8 is not less than 10 mm.
[0040] With such a setting, the waterproof effect of the flexible high-bonding waterproof layer is ensured.
[0041] In another embodiment of the present utility model, as Figure 1 shown, the upper surface of the flexible high-bonding waterproof layer 8 is concave downward.
[0042] With such a setting, the stability of its surface is ensured.
[0043] In another embodiment of the present utility model, as Figure 1 shown, a sand surface bonding layer 9 is provided between the upper surface of the flexible high-bonding waterproof layer 8 and the concrete block 1, and a butyl rubber bonding layer 10 is provided between the lower surface of the horizontal support plate 5 and the concrete block 1.
[0044] With such a setting, the connectivity between the flexible high-bonding waterproof layer 8 and the concrete block 1, as well as the connection performance between the horizontal support plate 5 and the concrete block 1, are ensured.
[0045] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the protection scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A waterproof structure for underground engineering construction joints, comprising a concrete block, characterized in that: A supporting formwork is horizontally arranged in the concrete block, and the supporting formwork includes two first side panels and a second side panel that are vertically parallel to each other. A horizontal supporting plate is connected between the first side panel and the second side panel, and the main parts of the horizontal supporting plate are respectively vertically arranged with the first side panel and the second side panel. One end of the horizontal supporting plate close to the second side panel is bent and connected to the upper end of the second side panel, and one end of the horizontal supporting plate is connected to the lower section of the first side panel. The second side panel is anchored to the concrete block by anchoring screws, and a flexible high-adhesion waterproof layer is formed on the supporting formwork, and both ends of the flexible high-adhesion waterproof layer are embedded in the concrete block.
2. The underground engineering construction joint waterproof structure according to claim 1, characterized in that: An interface reinforcement layer is arranged between the side surface of the flexible high-adhesion waterproof layer and the concrete block.
3. The underground engineering construction joint waterproof structure according to claim 1, characterized in that: The first side plate, the second side plate and the horizontal supporting plate are integrally formed.
4. The underground engineering construction joint waterproof structure according to claim 1, characterized in that: One end of the horizontal support plate is bent vertically downward and then bent horizontally outward to connect with the lower side of the first side plate, and the other end of the horizontal support plate is bent obliquely downward and connected with the upper end of the second side plate.
5. The underground engineering construction joint waterproof structure according to claim 4, characterized in that: The included angle between the second side plate and the end of the horizontal support plate is 150 degrees.
6. The underground engineering construction joint waterproof structure according to claim 1, characterized in that: The thickness of the flexible high-adhesion waterproof layer is not less than 10 mm.
7. The underground engineering construction joint waterproof structure according to claim 1, characterized in that: The upper surface of the flexible high-adhesion waterproof layer is concave downward.
8. The underground engineering construction joint waterproof structure according to claim 1, characterized in that: A sand surface bonding layer is arranged between the upper surface of the flexible high-adhesion waterproof layer and the concrete block, and butyl adhesive bonding is arranged between the lower surface of the horizontal support plate and the concrete block.