A kind of underground exterior wall advanced water-stop post-casting strip non-removal formwork and construction method

Abstract

The invention discloses a non-removal template for an advanced water-stop post-casting strip of an underground external wall and a construction method, comprising an underground external wall, a quick and easy closing net, a non-removal template, underground external wall steel bars, a wooden template, a wooden square, an advanced water-stop retaining wall, a φ48 steel pipe, and a water-stop screw. The beneficial effects of the invention are: on the premise of satisfying the advanced water-stopping of the post-casting strip, the construction process of the advanced water-stop post-casting strip is simplified, the inner template does not need to be removed, and the underground external wall is guaranteed to be water-free before the post-casting strip concrete is poured, and the external wall waterproofing and backfilling construction can be carried out in advance, which speeds up the construction progress and ensures the construction quality.

Description

Technical Field

[0001] The invention relates to a non-disassembly formwork for an advanced water-stop post-casting strip, in particular to a non-disassembly formwork for an advanced water-stop post-casting strip for an underground exterior wall and a construction method, belonging to the technical field of building construction. Background Art

[0002] After the main body is completed, the concrete of the post-casting strip is poured. This kind of water stop used in the post-casting strip and poured before the post-casting strip is called an advanced water stop post-casting strip. In actual construction projects, the retention time of the post-casting strip is generally longer.

[0003] When the foundation of a building is below the groundwater level, the traditional post-casting method is used. The concrete of the post-casting must be poured after the main structure is completed. The prefabricated panels of the existing external wall advance water-stop formwork device are not well stressed, are difficult to hoist and do not have good waterproof performance. In addition, the advance water-stop post-casting water-stop retaining wall is difficult to remove, and the quality of the project construction cannot be ensured.

[0004] Based on this, the present application proposes a non-removal formwork and construction method for an advanced water-stop post-cast strip for an underground exterior wall. Summary of the invention

[0005] The purpose of the present invention is to provide a non-removal formwork and construction method for an underground exterior wall advanced water-stop post-cast strip in order to solve the problem.

[0006] The present invention achieves the above-mentioned purpose through the following technical scheme: a non-removal formwork for an advanced water-stop post-casting strip of an underground exterior wall, comprising an underground exterior wall and an advanced water-stop retaining wall; the advanced water-stop retaining wall blocks the outside of the cross-section of the underground exterior wall, a non-removal formwork is arranged between the underground exterior wall and the advanced water-stop retaining wall, underground exterior wall steel bars arranged crosswise and vertically are arranged in the underground exterior wall, and the outer sides of the walls on both sides of the cross-section of the underground exterior wall are wrapped with a quick-closing net, underground exterior wall steel bars arranged crosswise and vertically are arranged in the advanced water-stop retaining wall, a wooden formwork is arranged on the outer side of the advanced water-stop retaining wall, a wooden square is arranged on the outer side of the wooden formwork, a φ48 steel pipe is arranged on the outer side of the wooden square, a water-stop screw is passed through the wooden squares on both sides of the advanced water-stop retaining wall, and is stretched and fixed by nuts, a φ48 steel pipe is passed through the bottom wooden square of the advanced water-stop retaining wall and the non-removal formwork, and is stretched and fixed by nuts.

[0007] As a further solution of the present invention: the non-disassembly formwork is a rectangular GRC board with a thickness of 40 mm.

[0008] As a further solution of the present invention: φ16 PVC sleeves are buried in the non-disassembly template, and the spacing between the PVC sleeves is 300 mm, the bottom row is 200 mm from the ground, and the edge sleeves on both sides are 100 mm away from the edge of the template.

[0009] As a further solution of the present invention: the surface of the non-disassembly template is serrated.

[0010] As a further solution of the present invention: the non-disassembly formwork is provided with a φ6@200mm steel mesh.

[0011] As a further solution of the present invention: the φ48 steel pipes are arranged in groups of two as the keel of the water-stop screw pull reinforcement template, and the φ48 steel pipes are arranged vertically.

[0012] A construction method for an underground exterior wall advanced water-stop post-casting strip without dismantling formwork, the construction method comprising the following steps:

[0013] Step 1: First, set up a non-removal formwork on the outer side of the section of the underground exterior wall, and install a φ6@200mm steel mesh in the non-removal formwork;

[0014] Step 2: Then build a wooden formwork on the outside of the non-removal formwork, and set wooden squares on the outside of the wooden formwork, use water-stop screws to pull and reinforce the wooden formwork on the left and right sides, and use water-stop screws to pull and reinforce the non-removal formwork and the wooden formwork at the bottom;

[0015] Step 3: pouring concrete inside the wooden formwork and the non-removal formwork to form an advanced water-stop retaining wall 7;

[0016] Step 4: After the concrete strength reaches the requirements for formwork removal, remove the outer wooden formwork and pull out the φ48 steel pipe keel used to reinforce the formwork from the top;

[0017] Step 5. Cut off the exposed part of the waterstop screw, treat it with waterproof mortar, and then waterproof it together with the outer wall of the basement and backfill the foundation pit in time.

[0018] The beneficial effects of the present invention are as follows: the underground exterior wall advance water-stop post-casting strip, the template that does not require removal and the construction method are reasonably designed. Under the premise of meeting the advance water-stopping of the post-casting strip, the construction process of the advance water-stop post-casting strip is simplified, and the inner template does not need to be removed, ensuring that the underground exterior wall does not leak before the post-casting strip concrete is poured. The exterior wall waterproofing and backfill construction can be carried out in advance, which speeds up the construction progress and ensures the construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a cross-sectional view of the advanced water-stopping post-casting strip of the underground exterior wall of the present invention;

[0020] Figure 2 This is a vertical view of the template reinforcement of the advanced water-stop post-cast strip of the underground exterior wall of the present invention.

[0021] In the picture: 1. underground exterior wall, 2. quick-closing net, 3. non-dismantling formwork, 4. underground exterior wall steel bars, 5. wooden formwork, 6. wooden squares, 7. advanced water-stop retaining wall, 8. φ48 steel pipe and 9. water-stop screws. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figures 1-2 , an underground exterior wall advance water-stop post-casting strip non-removal formwork, comprising an underground exterior wall 1 and an advance water-stop retaining wall 7; the advance water-stop retaining wall 7 blocks the outer side of the cross section of the underground exterior wall 1, a non-removal formwork 3 is arranged between the underground exterior wall 1 and the advance water-stop retaining wall 7, underground exterior wall steel bars 4 arranged in a vertical and horizontal cross arrangement are arranged in the underground exterior wall 1, and the outer side of the wall body on both sides of the cross section of the underground exterior wall 1 is wrapped with a quick-closing net 2, underground exterior wall steel bars 4 arranged in a vertical and horizontal cross arrangement are arranged in the advance water-stop retaining wall 7, a wooden formwork 5 is arranged on the outer side of the advance water-stop retaining wall 7, a wooden square 6 is arranged on the outer side of the wooden formwork 5, and a φ48 steel pipe 8 is arranged on the outer side of the wooden square 6, a water-stop screw 9 is passed between the wooden squares 6 on both sides of the advance water-stop retaining wall 7, and is stretched and fixed by nuts, a φ48 steel pipe 8 is passed between the bottom wooden square 6 of the advance water-stop retaining wall 7 and the non-removal formwork 3, and is stretched and fixed by nuts.

[0024] In the embodiment of the present invention, the non-removal formwork 3 is a 40 mm thick rectangular GRC board, which has the advantages of light weight, high strength, and easy installation, and does not need to be removed after installation.

[0025] In the embodiment of the present invention, a φ16 PVC sleeve is buried in the non-disassembly formwork 3, and the spacing between the PVC sleeves is 300 mm. The bottom row is 200 mm from the ground, and the edge sleeves on both sides are 100 mm away from the edge of the formwork, which is used to pass the water-stop screw 9 and tighten and reinforce it.

[0026] In the embodiment of the present invention, the surface of the non-disassembly formwork 3 is serrated, so that it forms a whole with the exterior wall after concrete pouring, thereby increasing the waterproof effect.

[0027] In the embodiment of the present invention, the non-disassembly formwork 3 is provided with a φ6@200mm steel mesh to ensure its strength.

[0028] In the embodiment of the present invention, the φ48 steel pipes 8 are arranged in groups of two as the keel of the water-stop screws 9 to pull and reinforce the formwork, and the φ48 steel pipes 8 are arranged vertically, so that there is no need to set a secondary keel on the outside of the non-dismantling formwork 3, reducing the difficulty of constructing the advanced water-stop retaining wall.

[0029] A construction method for an underground exterior wall advanced water-stop post-casting strip without dismantling formwork, the construction method comprising the following steps:

[0030] Step 1: First, a non-removal formwork 3 is set on the outer side of the section of the underground outer wall 1, and a φ6@200mm steel mesh is provided inside the non-removal formwork 3;

[0031] Step 2: Then build a wooden formwork 5 on the outside of the non-removal formwork 3, and set a wooden square 6 on the outside of the wooden formwork 5, and use the water-stop screws 9 to pull and reinforce the wooden formwork 5 on the left and right sides, and use the water-stop screws 9 to pull and reinforce the non-removal formwork 3 and the wooden formwork 5 at the bottom;

[0032] Step 3: pouring concrete inside the wooden formwork 5 and the non-removal formwork 3 to form an advanced water-stopping retaining wall 7;

[0033] Step 4: After the concrete strength reaches the requirements for demolding, remove the outer wooden formwork 5, and pull out the φ48 steel pipe 8 keel used to reinforce the non-dismantling formwork 3 from the top;

[0034] Step 5: Cut off the exposed part of the water stop screw 9, treat it with waterproof mortar, waterproof it together with the basement outer wall and backfill the foundation pit in time.

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A construction method for underground exterior wall advanced water-stop post-casting strip without dismantling formwork, characterized in that: The underground external wall advanced water-stop post-casting strip non-removal formwork comprises an underground external wall (1) and an advanced water-stop retaining wall (7); the advanced water-stop retaining wall (7) blocks the outside of the cross section of the underground external wall (1); a non-removal formwork (3) is arranged between the underground external wall (1) and the advanced water-stop retaining wall (7); underground external wall steel bars (4) arranged crosswise in a vertical direction are arranged in the underground external wall (1); the outer side of the wall body on both sides of the cross section of the underground external wall (1) is wrapped with a quick-closing net (2); and the advanced water-stop retaining wall (7) is arranged crosswise in a vertical direction. An underground outer wall steel bar (4) is provided, a wooden formwork (5) is provided on the outer side of the advanced water-stopping retaining wall (7), a wooden square (6) is provided on the outer side of the wooden formwork (5), a φ48 steel pipe (8) is provided on the outer side of the wooden square (6), a water-stop screw (9) is passed through the wooden squares (6) on both sides of the advanced water-stopping retaining wall (7), and is stretched and fixed by nuts, and a φ48 steel pipe (8) is passed through the wooden squares (6) at the bottom of the advanced water-stopping retaining wall (7) and the non-removal formwork (3), and is stretched and fixed by nuts; The non-disassembly formwork (3) is a rectangular GRC board with a thickness of 40 mm; a φ16 PVC sleeve is embedded in the non-disassembly formwork (3), and the spacing between the PVC sleeves is 300 mm, the bottom row is 200 mm from the ground, and the sleeves on both sides are 100 mm from the edge of the formwork; the surface of the non-disassembly formwork (3) is serrated; a φ6@200 mm steel mesh is provided inside the non-disassembly formwork (3); the φ48 steel pipes (8) are arranged in groups of two as the keel of the water stop screws (9) for pulling and reinforcing the formwork, and the φ48 steel pipes (8) are arranged vertically; The construction method comprises the following steps: Step 1: firstly, a non-removal formwork (3) is set on the outer side of the cross section of the underground outer wall (1), and a φ6@200mm steel mesh is provided inside the non-removal formwork (3); Step 2: Then, a wooden formwork (5) is built on the outside of the non-removal formwork (3), and wooden squares (6) are arranged on the outside of the wooden formwork (5). The wooden formworks (5) on the left and right sides are reinforced by pulling together using water-stop screws (9), and the non-removal formwork (3) and the wooden formwork (5) at the bottom are reinforced by pulling together using water-stop screws (9); Step 3: pouring concrete inside the wooden formwork (5) and the non-removal formwork (3) to form an advanced water-stopping retaining wall (7); Step 4: After the concrete strength reaches the requirements for demolding, the outer wooden formwork (5) is removed, and the φ48 steel pipe (8) keel used to reinforce the demolding-free formwork (3) is pulled out from the top; Step 5: Cut off the exposed part of the water stop screw (9), treat it with waterproof mortar, waterproof it together with the basement exterior wall and backfill the foundation pit in time.

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