Basement exterior wall formwork reinforcing and waterproof construction method under narrow space condition

Abstract

The invention relates to the technical field of construction, and discloses a basement exterior wall formwork reinforcing and waterproof construction method under a narrow space condition, which comprises the following steps: S1, planting steel bars on the surfaces: planting steel bars on the surfaces of support piles and meat piles, preparing required materials and tools, determining the positions and the number of the planted steel bars, and marking according to design requirements; s2, net hanging, concrete spraying and leveling are conducted, specifically, materials and equipment needed by concrete spraying are prepared firstly, and then the surfaces of the supporting piles and the surfaces of the meat piles are cleaned; and S3, waterproof coating brushing: firstly, wetting the surface of the base layer by using a proper amount of water without water, then uniformly brushing the waterproof coating from one direction by using a tool, and carrying out supplementary brushing in time. According to outer wall construction, a three-section type water stop screw is adopted, a water swelling strip is pasted to the joint of the three-section type water stop screw and a waterproof roll, 2-3 times of swelling deformation is generated after the water swelling strip encounters water, all irregular surfaces, holes and gaps of joints are filled with the water swelling strip, meanwhile, huge contact pressure is generated, and leakage is thoroughly prevented.

Description

Technical Field

[0001] The invention relates to the technical field of construction, and in particular to a basement exterior wall formwork reinforcement and waterproofing construction method under narrow space conditions. Background Art

[0002] Waterproofing the basement exterior wall is an important project to ensure that the basement building structure and internal environment are dry and safe. The construction of the waterproof layer is crucial to the stability of the basement building structure. It can effectively prevent moisture from penetrating into the basement from the exterior wall and reduce the risk of moisture in the structure. At the same time, the reasonable selection of waterproof materials and technologies can improve the durability and pressure resistance of the basement building.

[0003] The common construction method nowadays is to have enough space between the outer wall of the basement and the supporting piles. The outer wall construction adopts double-sided formwork, which is fixed with water-stop screws and concrete is poured. After the concrete strength reaches the level required for demolding, the outer wall waterproofing construction is carried out. This method cannot meet the requirements of the outer wall construction of the basement in a small space. At the same time, there are holes in the position of the tension screws used for formwork reinforcement, which need to be processed again during subsequent waterproofing construction, and leakage points are prone to occur. Brick formwork is used for masonry at the position where the outer formwork cannot be supported to ensure the flatness of the outer wall. However, when encountering buildings with high basement floors, brick formwork is dangerous and the inner formwork is difficult to reinforce. At the same time, the waterproof membrane and the brick formwork are in a water environment for a long time, and the aerated blocks are prone to corrosion, causing the waterproof additional layer to fall off, which has a certain impact on the waterproof effect. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a method for reinforcing and waterproofing the basement exterior wall formwork in a narrow space, which solves the problem that the distance between the basement exterior wall and the supporting piles is too close, making it difficult to reinforce and waterproof the basement exterior wall formwork.

[0005] To achieve the above purpose, the present invention is implemented by the following technical scheme: a method for reinforcing and waterproofing the basement exterior wall formwork under narrow space conditions, comprising the following steps: S1. Surface rebar planting: rebar planting is carried out on the surface of supporting piles and piles. The required materials and tools are prepared, the location and quantity of rebar planting are determined, and they are marked according to the design requirements. Holes are drilled at the marked locations, and the hole cleaning tools are used to remove dust and debris in the holes to ensure that the holes are clean and free of impurities. The prepared rebar planting glue is injected into the holes using the glue injection tools, and the treated steel bars are inserted into the holes filled with glue to fully combine the steel bars with the rebar planting glue, and then left to solidify; S2. Leveling by mesh spraying: first prepare the materials and equipment required for spraying concrete, then clean the surface of the supporting piles, remove loose soil, debris and oil stains, chisel off the protruding parts of the surface, fill the concave parts, and hang the mesh to fix the steel mesh on the surface of the supporting piles according to the design requirements, and fix it by anchor nails or welding. Before spraying concrete, spray the surface of the base layer with a proper amount of water, but there should be no water accumulation on the surface. Start the sprayer, spray the mixed concrete evenly onto the surface of the supporting piles, and level the concrete surface with a scraper tool; S3. Apply waterproof coating: first use an appropriate amount of water to wet the surface of the base layer, but no visible water should be left. Then use a tool to evenly apply the waterproof coating from one direction. After the application is completed, check whether there are any missed, uneven or weak parts of the coating. If necessary, apply more coating in time. After completion, check the quality of the coating. S4. Hanging and laying waterproofing membrane: prepare the pre-laid waterproofing membrane and pop up the reference line for laying the membrane on the base. Unfold the membrane and lay it along the reference line from one end. The laying direction of the membrane should be consistent with the direction of water flow. Then overlap the adjacent membranes without wrinkles and twists. After laying, check the laying quality of the membrane. S5. Welding and fixing of water stop bolts and anchor bars: First, use cleaning tools to clean the surface rust, oil and impurities on the welding parts of water stop bolts and anchor bars, then align and fix the water stop bolts and anchor bars, then weld them, perform quality inspection, and then perform anti-rust treatment on the welding parts; S6. Paste the waterstop strip: prepare the water-expandable waterstop strip, adhesive and cleaning tools, measure and cut the waterstop strip of appropriate length according to the size of the part to be pasted, paste the waterstop strip coated with adhesive on the base layer according to the predetermined position, press hard to make it fit tightly with the base layer, compact the pasted waterstop strip, and after pasting, check the pasting quality of the waterstop strip. If there is any looseness, unevenness or bubble, repair it in time; S7. Reinforce the formwork: Assemble the formwork according to the designed position and size, determine the position of the waterstop screw on the formwork, weld the three-section waterstop screw to the embedded reinforcement in the area where the supporting piles are rebar; in the plain pile area, weld the waterstop screw directly to the shear wall reinforcement, install steel pipes in the horizontal direction on the outside of the formwork as transverse supports, and install square timber in the vertical direction on the outside of the transverse supports as longitudinal supports. On both sides of the formwork, tighten the formwork with tension bolts.

[0006] Preferably, in S1, the materials and tools include rebar embedding glue, steel bars, drilling equipment and hole cleaning tools, the amount of glue injection is 2 / 3 of the hole depth, the curing temperature is 20-25°C, the initial curing is 1-2 hours, the complete curing time is 24-72 hours, the steel bars are arranged in 450X450MM, and rebar is embedded in meat piles but not in plain piles.

[0007] Preferably, in S2, the materials required for the shotcrete include cement, sand, gravel and admixtures, and the equipment includes a concrete sprayer, wherein the spraying angle of the concrete sprayer is 15 degrees, the distance is 0.6-1.2 meters, the speed is 0.8-1.5 meters / minute, the spraying thickness is 50-80 millimeters, and the next layer is sprayed after the previous layer solidifies.

[0008] Preferably, in S3, the waterproof coating includes a cement-based penetrating crystalline waterproof coating, the quality of the coating includes thickness, uniformity and the presence or absence of cracks, and the coating thickness is 0.8-1.5MM.

[0009] Preferably, in S4, the laying quality includes the flatness of the overlapping parts and the roll material, the overlapping method is hot melt or self-adhesive, the bonding time is 5-30 minutes, and the thickness of the waterproof roll material is 1.5MM.

[0010] Preferably, in S5, the cleaning tool includes a wire brush or sandpaper, the anti-rust treatment is performed by applying anti-rust paint, the quality inspection includes welding strength and position accuracy, and the water-stop welding method uses a three-section water-stop screw and embedded steel bars for welding, wherein the three-section water-stop screw is arranged in 450x450mm and welded to the embedded steel bars, and the plain pile area is directly welded to the steel bars on the outside of the shear wall.

[0011] Preferably, in S6, the adhesive includes waterproof adhesive, structural adhesive or super glue, the cleaning tools include broom, rag, hair dryer and wire brush, the length of the water stop strip is 1-5 meters, and the bonding time is 5-30 minutes.

[0012] Preferably, in S7, the thickness of the wooden square is 50x100mm, the outer side of the template is supported by diagonal rods with a horizontal and vertical spacing of 2 meters, and a steel pipe with a diameter of 48x3.2 is used.

[0013] The present invention provides a method for reinforcing and waterproofing the basement exterior wall formwork in a narrow space. It has the following beneficial effects: 1. The present invention adopts a three-section water-stop screw in the exterior wall construction and pastes a water-swelling water-stop strip at the connection with the waterproof membrane, which expands and deforms 2-3 times after contacting water, fills all irregular surfaces, holes and gaps in the joints, and generates huge contact pressure at the same time, completely preventing leakage.

[0014] 2. The present invention adopts three-stage water-stop screws and welding with steel bars on supporting piles to ensure the quality of template reinforcement and prevent template deviation during pouring. Since the outer wall and supporting piles form a whole, the holes in the outer wall are reduced and the risk of leakage is reduced. The outer wall and waterproofing construction of the basement can be completed at one time, meeting the technical standard for waterproofing of construction projects SJG19-2013, reducing the need to process the outer wall surface during later waterproofing construction, and significantly improving work efficiency.

[0015] 3. The water-swelling waterstop strip is pasted at the intersection of the waterstop screw and the waterproof membrane of the present invention, which effectively reduces leakage. The three-stage waterstop screw is welded to the steel bars planted on the supporting piles and is used for template reinforcement to ensure the quality of template reinforcement and prevent the template from shifting during pouring. Because the outer wall and the supporting piles form a whole, reducing the number of holes in the outer wall, the supporting piles form a whole with the outer wall of the basement and additional waterproofing without gaps, thereby ensuring the waterproof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a flow chart of the present invention; Figure 2 It is a planed surface view of the template of the present invention.

[0017] In the figure, 1. Support piles; 2. Embedded reinforcement; 3. Three-section waterstop screws; 4. Wooden planks; 5. Basement exterior wall; 6. Water-swelling waterstop strips; 7. Diagonal support rods. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings 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. Example

[0019] Please see attached Figure 1 -Attached Figure 2 The embodiment of the present invention provides a method for reinforcing and waterproofing the basement exterior wall formwork in a narrow space, comprising the following steps: S1, surface rebar planting 2: rebar planting 2 is performed on the surface of the support pile 1, the required materials and tools are prepared, the position and quantity of rebar planting 2 are determined, and the holes are marked according to the design requirements. Holes are drilled at the marked positions, and the hole cleaning tools are used to remove dust and debris in the holes to ensure that the holes are clean and free of impurities. The prepared rebar planting 2 glue is injected into the holes using the glue injection tools, and the treated steel bars are inserted into the holes filled with glue to fully combine the steel bars with the rebar planting 2 glue, and then left to solidify; S2. Leveling by mesh spraying: first prepare the materials and equipment required for spraying concrete, then clean the surface of the supporting pile 1, remove loose soil, debris and oil stains, chisel off the protruding parts of the surface, fill the concave parts, and hang the mesh to fix the steel mesh on the surface of the supporting pile 1 according to the design requirements, and fix it by anchor nails or welding. Before spraying concrete, spray the surface of the base layer with a proper amount of water, but there should be no water accumulation on the surface. Start the sprayer, spray the mixed concrete evenly onto the surface of the supporting pile 1, and level the concrete surface with a scraper tool; S3. Apply waterproof coating: first use an appropriate amount of water to wet the surface of the base layer, but no visible water should be left. Then use a tool to evenly apply the waterproof coating from one direction. After the application is completed, check whether there are any missed, uneven or weak parts of the coating. If necessary, apply more coating in time. After completion, check the quality of the coating. S4. Hanging and laying waterproofing membrane: prepare the pre-laid waterproofing membrane and pop up the reference line for laying the membrane on the base. Unfold the membrane and lay it along the reference line from one end. The laying direction of the membrane should be consistent with the direction of water flow. Then overlap the adjacent membranes without wrinkles and twists. After laying, check the laying quality of the membrane. S5. Welding and fixing the water stop bolt and the anchor bar 2: First, use a cleaning tool to clean the surface rust, oil and impurities of the welding part of the water stop bolt and the anchor bar 2, then align and fix the water stop bolt and the anchor bar 2, then weld them, perform quality inspection on them, and then perform anti-rust treatment on the welding part; S6, pasting water stop strips: prepare water-swellable water stop strips 6, adhesives and cleaning tools, measure and cut water stop strips of appropriate length according to the size of the part to be pasted, paste the water stop strips coated with adhesive on the base layer according to the predetermined position, press hard to make it fit closely with the base layer, compact the pasted water stop strips, and after pasting, check the pasting quality of the water stop strips. If there are any loose, uneven or air-filled places, repair them in time; S7. Reinforce the formwork: Assemble the formwork according to the designed position and size, determine the position of the waterstop screw on the formwork, and weld the three-section waterstop screw 3 to the embedded reinforcement 2 in the area where the supporting pile 1 has the embedded reinforcement 2; in the plain pile area, weld the waterstop screw directly to the shear wall reinforcement, install steel pipes in the horizontal direction on the outside of the formwork as transverse supports, and install square timber in the vertical direction on the outside of the transverse supports as longitudinal supports. On both sides of the formwork, tighten the formwork with tension bolts.

[0020] In S1, materials and tools include rebar embedding glue, steel bars, drilling equipment and hole cleaning tools. The amount of glue injected is 2 / 3 of the hole depth. The curing temperature is 20-25℃. The initial curing time is 1-2 hours and the complete curing time is 24-72 hours. The steel bars are arranged in 450X450MM. When encountering meat piles, rebars are embedded for 2 hours, but not for plain piles.

[0021] Specifically, materials and tools such as rebar embedding glue, steel bars, drilling equipment and hole cleaning tools are selected, and the amount of glue injected is 2 / 3 of the hole depth, which can ensure sufficient filling and avoid waste. The curing temperature is 20-25°C. Under this condition, the initial curing is 1-2 hours, and the complete curing time is 24-72 hours, which can ensure the stability and strength of the rebar embedding 2. The steel bars are arranged in 450X450MM. When encountering meat piles, rebars are embedded 2, but when encountering plain piles, no rebars are embedded 2. This targeted arrangement method can enhance the bearing capacity and stability of the supporting piles 1, and effectively improve the safety of the overall structure. At the same time, reasonable material selection and construction parameter setting improve construction efficiency and quality.

[0022] In S2, the materials required for shotcrete include cement, sand, gravel and admixtures, and the equipment includes a concrete sprayer. The spraying angle of the concrete sprayer is 15 degrees, the distance is 0.6-1.2 meters, the speed is 0.8-1.5 meters / minute, the spraying thickness is 50-80 mm, and the next layer is sprayed after the previous layer solidifies.

[0023] Specifically, the materials required for shotcrete include cement, sand, gravel and admixtures. The reasonable proportion of these materials can ensure the strength and performance of concrete. The equipment used is a concrete sprayer, with a spray angle of 15 degrees to ensure uniform coverage of concrete; a distance of 0.6-1.2 meters to ensure a dense spraying effect; a speed of 0.8-1.5 meters / minute to make the concrete evenly distributed; a spraying thickness of 50-80 mm, and the next layer is sprayed after the previous layer solidifies, which effectively avoids poor bonding between layers, improves the integrity and stability of the concrete layer, and thus enhances the reliability of the support structure.

[0024] S3 medium and waterproof coatings include cement-based penetrating crystalline waterproof coatings. The quality of the coating includes thickness, uniformity and the presence of cracks. The coating thickness is 0.8-1.5MM.

[0025] Specifically, cement-based penetrating crystallization waterproof coating is used, which has excellent waterproof performance and penetrating crystallization ability. The quality of the coating directly affects the waterproof effect. The thickness is controlled at 0.8-1.5MM, which can provide a sufficient waterproof barrier and effectively block water penetration. The uniformity ensures the consistent waterproof performance of the coating and avoids local weakness. The detection of cracks ensures the integrity of the coating and prevents water from invading through the cracks. Strictly controlling these quality indicators can significantly improve the waterproof reliability of the basement exterior wall 5, ensure the structural safety of the building, and reduce leakage risks.

[0026] In S4, the laying quality includes the flatness of the overlapping parts and the roll material. The overlapping method is hot melt or self-adhesive. The bonding time is 5-30 minutes. The thickness of the waterproof roll material is 1.5MM.

[0027] Specifically, the laying quality is particularly critical, including the flatness of the overlapped parts and the roll material. The overlap method adopts hot melt or self-adhesive method to ensure that the overlap is firm and sealed, effectively preventing water penetration. The bonding time is 5-30 minutes. The bonding effect can be guaranteed if the pasting is completed within this time period. The thickness of the waterproof roll material is 1.5MM, which can provide reliable waterproof performance. Strictly controlling these key points can improve the laying quality of the waterproof roll material, enhance the waterproof ability of the basement exterior wall 5, reduce the risk of leakage, extend the service life of the building, and reduce maintenance costs.

[0028] In S5, cleaning tools include wire brushes or sandpaper, anti-rust treatment is achieved by applying anti-rust paint, quality inspection includes welding strength and position accuracy, the water-stop welding method uses a three-section water-stop screw 3 welded to the embedded steel bar 2, wherein the three-section water-stop screw 3 is arranged in 450x450mm and welded to the embedded steel bar 2, and the plain pile area is directly welded to the steel bars on the outside of the shear wall.

[0029] Specifically, cleaning tools such as wire brushes or sandpaper can effectively remove impurities from the welding parts and ensure welding quality. Anti-rust treatment uses anti-rust paint to extend the service life of the welding parts and prevent rust. Quality inspection covers welding strength and position accuracy to ensure that the welding is firm and the position is precise. The water-stop welding method uses a three-section water-stop screw 3 to be welded with the anchor bar 2. The three-section water-stop screw 3 is arranged in 450x450mm and welded to the anchor bar 2. The plain pile area is directly welded to the steel bars on the outside of the shear wall. This method enhances the water-stop effect and improves the waterproof performance and stability of the structure.

[0030] In S6, the adhesive includes waterproof adhesive, structural adhesive or super glue, the cleaning tools include broom, rag, hair dryer and wire brush, the length of the water stop strip is 1-5 meters, and the bonding time is 5-30 minutes.

[0031] Specifically, the adhesive can be selected from waterproof adhesive, structural adhesive or super glue, which can ensure that the waterstop strip is firmly adhered and play a good water-stopping role. The cleaning tools include brooms, rags, hair dryers and wire brushes, which can effectively clean the pasting surface and improve the pasting effect. The length of the waterstop strip is 1-5 meters, which is convenient for cutting according to construction needs. The bonding time is 5-30 minutes. Operation within this time period can ensure that the adhesive can fully play its role, so that the waterstop strip is closely combined with the base layer, enhance the waterproof performance, effectively avoid leakage, and ensure the quality and service life of the project.

[0032] In S7, the thickness of the wooden square 4 is 50x100mm, and the outer side of the template is supported by diagonal rods 7 with a horizontal and vertical spacing of 2 meters, using steel pipes with a diameter of 48x3.2.

[0033] Specifically, the thickness of the wooden square 4 selected is 50x100mm, which has good supporting strength and stability. The outer side of the formwork is supported by diagonal rods 7, and the horizontal and vertical spacings are 2 meters, which can evenly disperse the pressure on the formwork. The steel pipe with a diameter of 48x3.2 has sufficient rigidity and bearing capacity. This support and reinforcement method can effectively prevent the formwork from deformation and displacement during concrete pouring, ensure the quality of concrete molding, improve the accuracy and efficiency of construction, and at the same time enhance the safety and stability of the structure.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for reinforcing and waterproofing the basement exterior wall formwork in a narrow space, characterized in that: The following steps are involved: S1. Surface rebar planting (2): rebar planting (2) is performed on the surface of the supporting pile (1). The required materials and tools are prepared, the position and quantity of the rebar planting (2) are determined, and the holes are marked according to the design requirements. Holes are drilled at the marked positions, and the hole cleaning tools are used to remove dust and debris in the holes to ensure that the holes are clean and free of impurities. The prepared rebar planting (2) glue is injected into the holes using the glue injection tools, and the treated steel bars are inserted into the holes filled with glue to fully combine the steel bars with the rebar planting (2) glue, and then left to stand for solidification; S2. Leveling by mesh spraying: first prepare the materials and equipment required for spraying concrete, then clean the surface of the supporting pile (1), remove loose soil, debris and oil stains, chisel off the protruding parts of the surface, fill the concave parts, and hang the mesh to fix the steel mesh on the surface of the supporting pile (1) according to the design requirements, using anchors or welding to fix it. Before spraying concrete, spray a proper amount of water on the surface of the base to moisten it, but no water should accumulate on the surface. Start the sprayer, spray the mixed concrete evenly onto the surface of the supporting pile (1), and level the concrete surface with a scraper tool; S3. Apply waterproof coating: first use an appropriate amount of water to wet the surface of the base layer, but no visible water should be left. Then use a tool to evenly apply the waterproof coating from one direction. After the application is completed, check whether there are any missed, uneven or weak parts of the coating. If necessary, apply more coating in time. After completion, check the quality of the coating. S4. Hanging and laying waterproofing membrane: prepare the pre-laid waterproofing membrane and pop up the reference line for laying the membrane on the base. Unfold the membrane and lay it along the reference line from one end. The laying direction of the membrane should be consistent with the direction of water flow. Then overlap the adjacent membranes without wrinkles and twists. After laying, check the laying quality of the membrane. S5. Welding and fixing of water stop bolts and anchor bars (2): First, use a cleaning tool to clean the surface rust, oil and impurities of the welding parts of the water stop bolts and anchor bars (2), then align and fix the water stop bolts and anchor bars (2), then weld them, perform quality inspection on them, and then perform anti-rust treatment on the welding parts; S6, pasting the water stop strip: prepare the water-swellable water stop strip (6), adhesive and cleaning tools, measure and cut the water stop strip to a suitable length according to the size of the part to be pasted, paste the water stop strip coated with adhesive on the base layer according to the predetermined position, press hard to make it fit tightly with the base layer, compact the pasted water stop strip, and after pasting, check the pasting quality of the water stop strip. If there is any looseness, unevenness or bubble, repair it in time; S7. Reinforce the formwork: Assemble the formwork according to the designed position and size, determine the position of the water stop screw on the formwork, and weld the three-section water stop screw (3) to the embedded reinforcement (2) in the area where the support pile (1) has embedded reinforcement (2); in the plain pile area, weld the water stop screw directly to the shear wall reinforcement, install steel pipes in the horizontal direction as transverse supports on the outside of the formwork, and install square wood in the vertical direction as longitudinal supports on the outside of the transverse supports. On both sides of the formwork, tighten the formwork by tension bolts.

2. The method for reinforcing and waterproofing the basement exterior wall formwork in a narrow space according to claim 1 is characterized in that: In S1, the materials and tools include rebar embedding (2) glue, steel bars, drilling equipment and hole cleaning tools. The amount of glue injected is 2 / 3 of the hole depth. The curing temperature is 20-25°C. The initial curing time is 1-2 hours. The complete curing time is 24-72 hours. The steel bars are arranged in 450X450MM. Rebars (2) are embedded in the raw piles, but not in the plain piles.

3. The method for reinforcing and waterproofing the basement exterior wall formwork in a narrow space according to claim 1 is characterized in that: In S2, the materials required for the shotcrete include cement, sand, gravel and admixtures, and the equipment includes a concrete sprayer, wherein the spraying angle of the concrete sprayer is 15 degrees, the distance is 0.6-1.2 meters, the speed is 0.8-1.5 meters / minute, the spraying thickness is 50-80 millimeters, and the next layer is sprayed after the previous layer solidifies.

4. The method for reinforcing and waterproofing the basement exterior wall formwork in a narrow space according to claim 1 is characterized in that: In S3, the waterproof coating includes a cement-based penetrating crystalline waterproof coating, and the quality of the coating includes thickness, uniformity and the presence or absence of cracks. The coating thickness is 0.8-1.5MM.

5. The method for reinforcing and waterproofing the basement exterior wall formwork in a narrow space according to claim 1 is characterized in that: In S4, the laying quality includes the flatness of the overlapping parts and the roll material, the overlapping method is hot melt or self-adhesive, the bonding time is 5-30 minutes, and the thickness of the waterproof roll material is 1.5MM.

6. The method for reinforcing and waterproofing the basement exterior wall formwork in a narrow space according to claim 1 is characterized by: In S5, the cleaning tool includes a wire brush or sandpaper, the anti-rust treatment is performed by applying anti-rust paint, the quality inspection includes welding strength and position accuracy, the water-stop welding method uses a three-section water-stop screw (3) to be welded with the embedded steel bar (2), wherein the three-section water-stop screw (3) is arranged in 450x450mm and is welded with the embedded steel bar (2), and the plain pile area is directly welded to the steel bars on the outer side of the shear wall.

7. The method for reinforcing and waterproofing the basement exterior wall formwork in a narrow space according to claim 1, characterized in that: In S6, the adhesive includes waterproof adhesive, structural adhesive or super glue, the cleaning tools include broom, rag, hair dryer and wire brush, the length of the water stop strip is 1-5 meters, and the bonding time is 5-30 minutes.

8. The method for reinforcing and waterproofing the basement exterior wall formwork in a narrow space according to claim 1, characterized in that: In S7, the thickness of the wooden square (4) is 50x100mm, and the outer side of the template is supported by diagonal rods (7) with a horizontal and vertical spacing of 2 meters, and a steel pipe with a diameter of 48x3.2 is used.

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