One-side formwork structure for narrow underground space

Abstract

The utility model discloses underground narrow space one side formwork structure, include: ground wall, its upper surface is many protruding structure, formwork component, its lower surface is with many recessed groove structure of protruding structure matching, from inside to outside, formwork component is composed of mortar layer, waterproof layer and aerated concrete batten layer, wherein, every protruding structure and every recessed groove structure's joint place inserts with first waterstop and second waterstop, second waterstop is located the inside of first waterstop. The utility model discloses through many protruding structures and many recessed groove structures splicing connect formwork component with ground wall, reduce the joint width, improve the leakproofness, set up first waterstop and second waterstop at the joint, form two lines of defense at the joint, improve waterproof, anti -permeation performance.

Description

Technical Field

[0001] This utility model relates to the field of formwork technology for narrow spaces. More specifically, this utility model relates to a unilateral formwork structure for narrow underground spaces. Background Technology

[0002] The underground narrow space formwork technology is mainly used in the construction of basement exterior walls. With the acceleration of urbanization and the advancement of construction technology, the construction requirements for basement exterior walls are becoming increasingly stringent. Especially when construction sites are limited and traditional double-sided formwork methods cannot be used, the underground narrow space single-sided formwork technology has emerged. This technology mainly uses the sidewall of the foundation pit directly as the outer formwork of the basement exterior wall, thereby reducing construction steps and completely eliminating the need for a large trench. This not only solves the problem of difficult formwork in the narrow space of a large trench, but also eliminates the safety risks of working in confined spaces, while avoiding the cost and quality problems common in later backfilling construction.

[0003] Despite the numerous advantages of single-sided formwork technology in narrow underground spaces, waterproofing of the exterior walls is a critical issue. Current methods using traditional brick walls as exterior formwork are not only inefficient but also have poor waterproofing performance, posing a risk of leakage. This not only affects the durability of the walls but may also threaten the normal use of the basement. Utility Model Content

[0004] One object of this invention is to solve at least the aforementioned problems and / or defects, and to provide at least the advantages described below.

[0005] The purpose of this utility model is to provide a single-sided formwork structure for narrow underground spaces, which is specifically designed for...

[0006] To achieve the objectives and other advantages of this utility model, a single-sided formwork structure for narrow underground spaces is provided, comprising:

[0007] The floor and walls have a multi-protruding structure on their upper surfaces.

[0008] The template component has a multi-groove structure on its lower surface that matches the multi-protrusion structure. From the inside out, the template component consists of a mortar layer, a waterproof layer, and an aerated concrete strip layer.

[0009] In this design, a first waterstop and a second waterstop are embedded at the joint of each protruding structure and each groove structure, with the second waterstop located inside the first waterstop.

[0010] Preferably, the first waterstop is a rubber waterstop, with its two ends fixed to the upper and lower ends of the inner side of the joint of each protruding structure and each groove structure, forming an overall U-shape; the second waterstop is a metal waterstop sheet, which starts from the end of the first waterstop and extends inward at a certain angle to the inner side of the joint.

[0011] Preferably, the single-sided formwork structure for the narrow underground space further includes:

[0012] A supporting member is provided on one side of the template member; the supporting member is a steel pipe, and a "grid-shaped" reinforcing rib is provided on one side of the template member. A connecting fastener is provided on the supporting member corresponding to one side of the template member to cooperate with the "grid-shaped" reinforcing rib. The connecting fastener includes a U-shaped clamp and a pair of fastening bolts. The opening size of the U-shaped clamp matches the outer diameter of the supporting member. The two sides of the U-shaped clamp are respectively provided with slots that are adapted to the "grid-shaped" reinforcing rib. The slots and the "grid-shaped" reinforcing rib are fixedly connected by a pair of fastening bolts.

[0013] Preferably, the other side of the template component is a slope protection pile, and the connection between the template component and the slope protection pile includes a first connection, a second connection and a third connection from bottom to top. Each of the first connection, the second connection and the third connection is provided with a U-shaped fastener and a reinforcing bar. One end of the reinforcing bar is welded to the U-shaped fastener and the other end is inserted into the slope protection pile.

[0014] Preferably, the mortar layer has a thickness of 10 mm, and the aerated concrete slab has a thickness of 200 mm.

[0015] Preferably, an inverted U-shaped water guide groove is provided at the joint between the support member and the template member and below the connecting fastener. The opening size of the inverted U-shaped water guide groove matches the width of the joint between the support member and the template member. The two sides of the inverted U-shaped water guide groove are fixedly connected to the support member and the template member, respectively.

[0016] Preferably, the other end of the reinforcing bar is inserted into the slope protection pile for a length of 200 mm.

[0017] This utility model has at least the following beneficial effects:

[0018] First, in the single-sided formwork structure for narrow underground spaces of this utility model, the multiple protruding structures of the ground wall and the multiple groove structures of the formwork components fit together closely. Double waterstops are set at the joints of each protruding structure and groove structure, which greatly enhances the waterproofing ability of the joints, effectively prevents the leakage of groundwater, and ensures the dryness and safety of the narrow underground space.

[0019] Secondly, the special structural design of the double waterstop in the single-sided formwork structure of the underground narrow space of this utility model not only facilitates the construction and installation in the narrow space, but also effectively seals the joints, extends the seepage path, and ensures the durability of the waterproof effect.

[0020] Third, in the single-sided formwork structure for narrow underground spaces of this utility model, a "well-shaped" reinforcing rib is set on the back of the formwork component, which effectively enhances the strength of the formwork component. The support component and the formwork component are connected by a U-shaped clamp so that one end of the support component tightly hugs the support component, and the other end is connected by a groove and fastening bolt to tightly connect the U-shaped clamp and the "well-shaped" reinforcing rib, ensuring that the connection between the support component and the formwork component is stable and reliable.

[0021] Fourth, the single-sided formwork structure for narrow underground spaces of this utility model has an inverted U-shaped water guide channel set at the joint between the support member and the formwork member and below the connecting fastener, which diverts the bottom seepage water to the collection well or drainage system, avoiding corrosion damage to the connection between the support member and the formwork member by the seepage water and enhancing the water-stopping effect.

[0022] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a single-sided formwork structure for a narrow underground space according to an embodiment of this utility model;

[0024] Figure 2 This is an enlarged view of the first connection point in a single-sided formwork structure for a narrow underground space according to an embodiment of this utility model;

[0025] Figure 3 This is an enlarged view of the second connection point in a single-sided formwork structure for a narrow underground space according to an embodiment of this utility model;

[0026] Figure 4 This is an enlarged view of the third connection point in a single-sided formwork structure for a narrow underground space according to an embodiment of this utility model;

[0027] Figure 5 This is a schematic diagram of the connection between the groove structure and the protrusion structure in a single-sided formwork structure for a narrow underground space according to an embodiment of this utility model.

[0028] Figure 6 This is a schematic diagram showing the connection between the supporting components and the formwork components in a single-sided formwork structure for a narrow underground space according to an embodiment of this utility model;

[0029] Figure 7This is a schematic diagram showing the placement of the "grid-shaped" reinforcing ribs in the template components of a single-sided formwork structure for a narrow underground space according to an embodiment of this utility model.

[0030] Reference numerals: 1: Ground wall; 100: Protruding structure; 2: Template component; 200: Groove structure; 3: First waterstop; 4: Second waterstop; 5: Support component; 6: "Well-shaped" reinforcing rib; 7: U-shaped clamp; 700: Groove; 8: First connection; 9: Second connection; 10: Third connection; 11: U-shaped fixer; 12: Reinforcing bar; 13: Inverted U-shaped water guide channel; 14: Slope protection pile. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0032] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0033] It should be noted that in the description of this utility model, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] It should be noted that, unless otherwise specified, the control methods in the following technical solutions are conventional methods, and the equipment structures, unless otherwise specified, can be obtained commercially.

[0035] like Figures 1-7 This utility model provides a single-sided formwork structure for narrow underground spaces, comprising:

[0036] The ground wall 1 has a multi-protruding structure 100 on its upper surface;

[0037] The template component 2 has a lower surface that is a multi-groove structure 200 that matches the multi-protrusion structure 100. From the inside to the outside, the template component 2 is composed of a mortar layer, a waterproof layer and an aerated concrete strip layer.

[0038] In this embodiment, a first waterstop 3 and a second waterstop 4 are embedded at the joint of each protruding structure 100 and each groove structure 200, and the second waterstop 4 is located inside the first waterstop 3.

[0039] In the above technical solution, the upper surface of the ground wall 1 is designed as a multi-protrusion structure 100. The cross-section of the protrusion structure 100 is trapezoidal, with a height of 50 mm, a top width of 30 mm, and a bottom width of 50 mm. The protrusion structures 100 are evenly distributed along the length of the wall, with a spacing of 200 mm. The lower surface of the formwork component 2 is designed as a multi-groove structure 200 that matches the multi-protrusion structure 100 of the ground wall 1. The cross-sectional shape of the groove structure 200 corresponds completely to the protrusion structure 100, ensuring that the two can fit tightly together. The formwork component 2 consists of the following three layers from the inside out: Mortar layer: 10 mm thick, used to provide a flat base layer. Waterproof layer: using high-polymer waterproof membrane (such as PVC, TPO), 2 mm thick, to ensure the waterproof performance of the formwork component 2. Aerated concrete strip layer: 200 mm thick, with lightweight, heat insulation, and sound insulation properties. The first waterstop 3 is a rubber waterstop, and the second waterstop 4 is a stainless steel metal waterstop. The tight fit between the raised structure 100 and the grooved structure 200 enhances the stability and waterproofness of the overall structure. The dual waterproof design of rubber waterstop and metal waterstop effectively prevents the infiltration of groundwater.

[0040] In another technical solution, such as Figure 5 As shown, the first waterstop 3 is a rubber waterstop, with its two ends fixed to the upper and lower ends of the inner side of the joint of each protruding structure 100 and each groove structure 200, forming a U-shape; the second waterstop 4 is a metal waterstop, which starts from the end of the first waterstop 3 and extends inward at a certain angle to the inner side of the joint.

[0041] In the above technical solution, the first waterstop 3 has a width of 30 mm and a thickness of 5 mm. Its two ends are fixed to the inner upper and lower ends of the joint between each raised structure 100 and grooved structure 200 using fixing bolts, forming a U-shape with the open end facing inward and the closed end facing outward, effectively preventing groundwater infiltration. The rubber waterstop has good elasticity and sealing properties, effectively sealing the joint between each raised structure 100 and grooved structure 200 and preventing water infiltration. The second waterstop 4 is made of stainless steel metal waterstop sheet, with a thickness of 1 mm and a width of 20 mm. It starts from the end of the first waterstop 3, extending inward at a 45° angle to the inner side of the joint, extending its length into the interior of the template component 2. The metal waterstop sheet has high strength and durability, and its angled extension design prolongs the seepage path, further enhancing the seepage prevention effect.

[0042] In another technical solution, the single-sided formwork structure for the narrow underground space further includes:

[0043] A supporting member 5 is provided on one side of the template member 2. The supporting member 5 is a steel pipe. A grid-shaped reinforcing rib 6 is provided on one side of the template member 2. A connecting fastener is provided on the supporting member 5 corresponding to the side of the template member 2 to cooperate with the grid-shaped reinforcing rib 6. The connecting fastener includes a U-shaped clamp 7 and a pair of fastening bolts. The opening size of the U-shaped clamp 7 matches the outer diameter of the supporting member 5. The two sides of the U-shaped clamp 7 are respectively provided with slots 700 that are adapted to the grid-shaped reinforcing rib 6. The slots 700 and the grid-shaped reinforcing rib 6 are fixedly connected by a pair of fastening bolts.

[0044] In the above technical solutions, such as Figure 6 and 7 As shown, a grid-shaped reinforcing rib 6 is installed on the back of the template component 2, facing the support component 5. The cross-sectional dimensions of the grid-shaped reinforcing rib 6 are made of square steel with a cross-sectional dimension of 50 mm × 50 mm. These square steels are welded together in two sets that are perpendicular to each other and evenly spaced to form a grid shape. During welding, carbon dioxide gas shielded welding is used to ensure that the weld is uniform and strong, and the strength of the weld is not lower than the strength of the square steel itself. The weld height is controlled at 6-8 mm to ensure the reliability of the connection. The spacing between adjacent ribs is reasonably designed according to the size of the template and the pressure it bears, generally between 300-500 mm, which can effectively enhance the strength of the template without excessively increasing material costs and weight. The support component 5 mainly adopts a steel pipe scaffolding system, using Q235 steel pipes with a diameter of 48 mm and a wall thickness of 3.5 mm. At the connection with the grid-shaped reinforcing ribs on the back of the template component, a specific structure of connecting fasteners is used. These connecting fasteners are made of high-strength cast steel and have good toughness and deformation resistance. The connecting fastener includes a U-shaped clamp 7 and two fastening bolts. The opening size of the U-shaped clamp 7 matches the outer diameter of the steel pipe, allowing it to tightly grip the pipe. On both sides of the U-shaped clamp 7, there are slots 700 that fit the "grid-shaped" reinforcing ribs. The fastening bolts secure the U-shaped clamp 7 to the "grid-shaped" reinforcing ribs. When the bolts are tightened, the U-shaped clamp 7 firmly clamps the steel pipe and the "grid-shaped" reinforcing ribs, ensuring a stable and reliable connection between the support component and the formwork component.

[0045] In another technical solution, the other side of the template component 2 is a slope protection pile 14. The connection between the template component 2 and the slope protection pile 14 includes a first connection 8, a second connection 9 and a third connection 10 from bottom to top. The first connection 8, the second connection 9 and the third connection 10 are all provided with U-shaped fasteners 11 and steel bars 12. One end of the steel bar 12 is welded to the U-shaped fastener 11 and the other end is inserted into the slope protection pile 14.

[0046] In the above technical solutions, such as Figure 1 , 2 As shown in Figures 3 and 4, the template component 2 is composed of multiple segments spliced ​​together. The lower surface of the bottom segment has a multi-groove structure 200 that fits into the multi-protrusion structure 100 of the ground wall 1 to form a first connection point 8. The bottom end and the middle segment can also be connected by a multi-groove structure and a multi-protrusion structure to form a second connection point 9. The middle segment and the top segment can also be connected by a multi-groove structure and a multi-protrusion structure to form a third connection point 10. Each connection point is provided with a U-shaped fastener 11 and a reinforcing bar 12. One end of the reinforcing bar 12 is welded to the U-shaped fastener 11, and the other end is inserted into the slope protection pile 14. The U-shaped fastener 11 is made of Q235 steel, with a width of 100 mm and a thickness of 10 mm. The opening width of the U-shaped fastener 11 matches the diameter of the reinforcing bar 12. The lower end of the U-shaped fastener 11 is inserted into the template component 2, and the upper opening is welded to the reinforcing bar 12. The reinforcing bar 12 is made of HRB400 grade steel, with a diameter of 16 mm and a length of 500 mm. One end of the reinforcing bar 12 is welded to the U-shaped fixing device 11, and the other end is inserted into the reserved hole of the slope protection pile 14. The length of the other end of the reinforcing bar inserted into the slope protection pile 14 is 200 mm.

[0047] In another technical solution, an inverted U-shaped water guide groove 13 is provided at the joint between the support member 5 and the template member 2 and below the connecting fastener. The opening size of the inverted U-shaped water guide groove 13 matches the width of the joint between the support member 5 and the template member 2. The two sides of the inverted U-shaped water guide groove 13 are fixedly connected to the support member 5 and the template member 2, respectively.

[0048] In the above technical solution, the inverted U-shaped water guide channel 13 is located below the joint between the supporting member 5 and the template member 2, and is used to collect and guide water that may seep into the joint. The opening size of the water guide channel 13 matches the width of the joint, specifically: opening width: 20mm (consistent with the joint width); height: 50mm; thickness: 2mm (made of stainless steel). The two sides of the water guide channel 13 are fixed to the supporting member 5 and the template member 2 by welding. The opening width of the water guide channel 13 is consistent with the joint width, ensuring that it can completely cover the joint. The water guide channel 13 is made of stainless steel, which has good corrosion resistance and durability. Placing the inverted U-shaped water guide channel 13 below the joint between the supporting member 5 and the template member 2, ensuring that its opening faces downward, can effectively block groundwater from entering the joint between the supporting member 5 and the template member 2. The two sides of the water guide channel 13 are fixed to the supporting member 5 and the template member 2 by welding, ensuring its stable position. A drain outlet is installed at the lower end of the inverted U-shaped water guide channel 13, connected to a drainage pipe, to guide the collected water to a sump or drainage system. The inverted U-shaped water guide channel 13 effectively collects and diverts water that may seep into the joints, preventing water accumulation that could damage the structure. The prefabrication and welding installation method of the water guide channel 13 simplifies the construction process and improves construction efficiency. Made of stainless steel, the water guide channel 13 has good corrosion resistance and durability, making it suitable for damp underground environments. The welding and fixing method of the water guide channel 13 to the supporting member 5 and the template member 2 ensures its stable position and prevents it from falling off due to external forces.

[0049] Although the technical solution of this utility model has been disclosed above, it is not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A one-side formwork structure for narrow underground space, characterized in that, include: The floor and walls have a multi-protruding structure on their upper surfaces. The template component has a multi-groove structure on its lower surface that matches the multi-protrusion structure. From the inside out, the template component consists of a mortar layer, a waterproof layer, and an aerated concrete strip layer. In this design, a first waterstop and a second waterstop are embedded at the joint of each protruding structure and each groove structure, with the second waterstop located inside the first waterstop.

2. The one-side formwork structure for underground narrow space according to claim 1, wherein The first waterstop is a rubber waterstop, with its two ends fixed to the upper and lower ends of the inner side of the joint of each protruding structure and each groove structure, forming a U-shape; the second waterstop is a metal waterstop sheet, which starts from the end of the first waterstop and extends inward at a certain angle to the inner side of the joint.

3. The one-sided formwork structure for underground narrow space according to claim 1, wherein Also includes: A supporting member is provided on one side of the template member; the supporting member is a steel pipe, and a "grid-shaped" reinforcing rib is provided on one side of the template member. A connecting fastener is provided on the supporting member corresponding to the side of the template member to cooperate with the "grid-shaped" reinforcing rib. The connecting fastener includes a U-shaped clamp and a pair of fastening bolts. The opening size of the U-shaped clamp matches the outer diameter of the supporting member. The two sides of the U-shaped clamp are respectively provided with slots adapted to the "grid-shaped" reinforcing rib. The slots and the "grid-shaped" reinforcing rib are fixedly connected by a pair of fastening bolts.

4. The one-sided formwork structure for underground narrow space according to claim 1, wherein The other side of the template component is a slope protection pile. The connection between the template component and the slope protection pile includes a first connection, a second connection and a third connection from bottom to top. Each of the first connection, the second connection and the third connection is provided with a U-shaped fixer and a steel bar. One end of the steel bar is welded to the U-shaped fixer and the other end is inserted into the slope protection pile.

5. The one-sided formwork structure for underground narrow space according to claim 1, wherein The thickness of the mortar layer is 10 mm, and the thickness of the aerated concrete strip is 200 mm.

6. The one-sided formwork structure for underground narrow space according to claim 3, wherein An inverted U-shaped water guide groove is provided at the joint between the support member and the template member and below the connecting fastener. The opening size of the inverted U-shaped water guide groove matches the width of the joint between the support member and the template member. The two sides of the inverted U-shaped water guide groove are fixedly connected to the support member and the template member, respectively.

7. The one-sided formwork structure for underground narrow space according to claim 4, wherein The other end of the reinforcing bar is inserted into the slope protection pile for a length of 200 mm.

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