Construction structure and construction method of single-side formwork wall of underground supporting structure

Abstract

The application provides a construction structure of a single-side formwork wall of a supporting structure of an underground structure, which comprises a pre-embedded part, a counter-pulling bolt and a structure connecting steel bar, the pre-embedded part is fixedly connected with a stress steel bar of the supporting structure, the counter-pulling bolt and the structure connecting steel bar are welded with the pre-embedded part, the structure connecting steel bar is welded and fixed with a stress steel bar of the structure wall, the pre-embedded part is cast in the supporting structure, the other end of the counter-pulling bolt is connected with a formwork through a fastener, and the formwork and the supporting structure are cast with concrete. The application is convenient to install and adjust, reduces construction steps, is stable in structure, is favorable for guaranteeing construction quality, reduces the number of chiseling, is convenient in structure connection, is stable in formwork support and reinforcement, reduces turnover materials and labor of support and reinforcement construction, is safer and more reliable in structure, and greatly improves construction efficiency.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a construction structure and construction method for an underground single-sided formwork wall with a support structure. Background Technology

[0002] When constructing underground walls with supporting structures, situations may arise where double-sided formwork cannot be used due to site constraints. In such cases, the outer supporting structure must replace the outer formwork, and the structural wall and supporting structure are connected as a whole, with only the inner formwork being constructed. Traditional construction methods for connecting the structural wall and supporting structure require pre-embedding U-shaped reinforcing bars or connectors in the supporting structure, with wood fiberboard embedded on the outside of the U-shaped bars. After the supporting structure is poured and excavation is completed, excess concrete at the location of the wood fiberboard is removed, and the wood fiberboard is also removed. The U-shaped reinforcing bars are then straightened into a U-shape and welded to the structural wall reinforcing bars or connected using connectors. Finally, the inner formwork is reinforced using a support structure. However, this method makes it difficult to guarantee the pre-embedded position of the wood wool board, which is prone to displacement during concrete pouring. Removal requires chiseling away excess concrete, the wood wool board, and the concrete encasing the reinforcing steel bars, making construction cumbersome and causing changes in the cross-sectional dimensions of the support structure in this area, creating a weak point. Furthermore, the use of a support method during formwork construction makes it difficult to guarantee structural dimensions, and formwork reinforcement is troublesome and unreliable. This makes it highly susceptible to formwork bulging, displacement, and changes in structural dimensions during concrete pouring, necessitating rework and repair later. Summary of the Invention

[0003] This invention provides a construction structure and method for a single-sided formwork wall with underground support structure. It is easy to install and adjust, reduces construction steps, ensures structural stability, and helps guarantee construction quality. It also reduces the number of chiseling operations, facilitates structural connections, stabilizes formwork support and reinforcement, reduces the need for turnover materials and labor in support and reinforcement construction, makes the structure safer and more reliable, and significantly improves construction efficiency.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] A construction structure for a single-sided formwork wall with an underground support structure includes embedded parts, tie bolts, and structural connecting steel bars. The embedded parts are fixedly connected to the reinforcing steel bars of the support structure. The tie bolts and structural connecting steel bars are welded to the embedded parts. The structural connecting steel bars are welded to the reinforcing steel bars of the structural wall. The embedded parts are cast in the support structure. The other end of the tie bolts is connected to the formwork through fasteners. Concrete is poured between the formwork and the support structure.

[0006] The embedded part includes embedded part anchor bars and embedded part steel plates. The embedded part anchor bars are fixedly welded to the embedded part steel plates, and the embedded part anchor bars are fixedly welded to the stressed bars of the supporting structure.

[0007] The structural connecting bars are in a "U" shape. The "U" shaped end faces of the structural connecting bars are fixedly welded to the embedded part steel plates, and the two sides of the "U" shape are fixedly welded to the stressed bars of the structural wall.

[0008] Pads are arranged between the formwork and the supporting structure.

[0009] The fasteners include U-shaped clips and nuts. Wooden battens are longitudinally placed on the outer side of the formwork, and steel pipes are transversely installed outside the wooden battens. The steel pipes are fixed with U-shaped clips, and the U-shaped clips are locked and fixed to the tie bolts through nuts.

[0010] A construction method for a construction structure of a one-sided formwork wall with a supporting structure underground includes the following method steps:

[0011] 1) Weld the embedded part anchor bars to one side surface of the embedded part steel plates, and then fixedly weld the embedded part anchor bars to the stressed bars of the supporting structure;

[0012] 2) After the casting of the supporting structure is completed and the earth excavation is completed, remove the redundant concrete on the other surface of the embedded part steel plate; weld the structural connecting bars and the tie bolts to the embedded part steel plates;

[0013] 3) Bind the steel reinforcement cage of the wall structure, and weld the structural connecting bars and the stressed bars of the wall structure into a whole;

[0014] 4) Set up the inner formwork of the wall. There are wooden battens behind the formwork, and the outside of the wooden battens is reinforced with steel pipes. Fix the positions of the steel pipes with U-shaped clips. After adjusting the position of the formwork, tighten the nuts on the tie bolts. Make the size and position of the formwork meet the design requirements. Under the pulling force of the tie bolts, a stable wall formwork support system is formed. After the wall formwork support system is completed, carry out the construction of casting the wall concrete.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1) The present invention is convenient for installation and adjustment, and reduces the workload of chiseling construction.

[0017] 2) The structure of the present invention is more stable, safe and reliable, the structural dimensions are easy to ensure, and the construction quality can be effectively guaranteed. [[ID=D34]]

[0018] 3) The present invention uses tie bolts to fix the formwork support system, reduces the consumption of turnover materials and the number of workers, is beneficial to cost saving, and greatly improves the construction efficiency. Description of the Drawings

[0019] Figure 1 This is a schematic diagram of the embedded part in this invention.

[0020] Figure 2 yes Figure 1 The right view.

[0021] Figure 3 This is a schematic diagram of the connection structure between the embedded parts, tie bolts, and reinforcing steel bars of the support structure.

[0022] Figure 4 yes Figure 3 AA view.

[0023] Figure 5 yes Figure 3 BB view.

[0024] Figure 6 This is a schematic diagram of the installation and construction of embedded parts.

[0025] Figure 7 This is a schematic diagram of the installation and construction of the reinforcing steel bars in the support structure.

[0026] Figure 8 This invention is an installation and construction general drawing.

[0027] In the diagram: 1-Embedded steel plate, 2-Embedded anchoring steel bar, 3-Structural connection steel bar, 4-Tie bolt, 5-Positioning steel bar, 6-Waterstop plate, 7-Nut, 8-W-shaped clip, 9-Push block, 10-Wooden joist, 11-Formwork, 12-Supporting structural reinforcing steel bar, 13-Steel pipe, 14-Structural wall reinforcing steel bar, 15-Concrete. Detailed Implementation

[0028] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0029] See Figures 1-8 A construction structure for a single-sided formwork wall with an underground support structure includes embedded parts, tie bolts 4, and structural connecting steel bars 3. The embedded parts are fixedly connected to the reinforcing steel bars 12 of the support structure. The tie bolts 4 and the structural connecting steel bars 3 are welded to the embedded parts. The structural connecting steel bars 3 are welded to the reinforcing steel bars 14 of the structural wall. The embedded parts are cast in the support structure. The other end of the tie bolts 4 is connected to the formwork 11 through fasteners. Concrete 15 is poured between the formwork 11 and the support structure.

[0030] The embedded parts include embedded anchor steel bars 2 and embedded steel plates 1. The embedded anchor steel bars 2 are welded and fixed to the embedded steel plates 1, and the embedded anchor steel bars 2 are welded and fixed to the supporting structure reinforcing bars 12.

[0031] The structural connecting steel bar 3 is in a "U" shape. The "U" shaped end face of the structural connecting steel bar 3 is welded and fixed to the embedded part steel plate 1, and the two sides of the "U" shape are welded and fixed to the structural wall stress steel bars 14.

[0032] A cushion block 9 is arranged between the template 11 and the supporting structure.

[0033] The fasteners include U-shaped clips 8 and nuts 7. Longitudinal back wooden beams 10 are arranged on the outer side of the template 11, and steel pipes 13 are transversely added on the outer side of the wooden beams 10. The steel pipes 13 are fixed with U-shaped clips 8, and the U-shaped clips 8 are locked and fixed to the tie bolts 4 through nuts 7.

[0034] A construction method for a construction structure of a single-sided formwork wall with a supporting structure underground includes the following method steps:

[0035] 1) Weld the embedded part anchor steel bar 2 on one side surface of the embedded part steel plate 1, and then weld and fix the embedded part anchor steel bar 2 to the supporting structure stress steel bar 12.

[0036] Cut the embedded part steel plate 1 and the embedded part anchor steel bar 2 according to the design dimensions, and weld the embedded part anchor steel bar 2 to the embedded part steel plate 1 to fabricate the embedded part.

[0037] Form holes (grooves) in the underground supporting structure, install the supporting structure steel reinforcement cage in the groove holes, and install the embedded part at the position designed in the drawing on the underground supporting structure steel reinforcement cage that has been tied up. The embedded part anchor steel bar 2 is welded firmly to the supporting structure stress steel bar 12 (as Figure 6 shown). Pour the supporting structure concrete and horizontal crown beams, internal braces and other supporting structures.

[0038] 2) After the supporting structure is poured and the earthwork excavation is completed, remove the redundant concrete on the other side surface of the embedded part steel plate 1; weld the structural connecting steel bar 3 and the tie bolt 4 to the embedded part steel plate 1 (as Figures 3-5 and Figure 7 shown).

[0039] After the supporting structure reaches the strength requirement, carry out the earthwork excavation construction, and carry out structures such as waist beams, anchor rods, and internal braces while excavating; after the supporting structure and the earthwork construction are completed, remove the floating soil, mud, concrete and other sundries on the surface at the position of the embedded part steel plate 1.

[0040] After the surface of the embedded part steel plate 1 is cleaned, weld the structural connecting steel bar 3 and the tie bolt 4 to the embedded part steel plate 1. For underground walls with waterproof requirements, a water stop sheet 6 should also be pre-welded on the tie bolt 4.

[0041] 3) Tie the wall structural steel reinforcement cage, and weld and connect the structural connecting steel bar 3 and the wall structural stress steel bar 14 into a whole.

[0042] 4) Erect the inner wall formwork 11, with wooden joists 10 on the back of the formwork 11. The wooden joists 10 are reinforced with steel pipes 13. Use U-shaped clamps 8 to fix the position of the steel pipes 13. After adjusting the position of the formwork 11, tighten the nuts 7 onto the tie bolts 4 to ensure that the size and position of the formwork 11 meet the design requirements. Under the action of the tie bolts 4, a stable wall formwork support system is formed. After the wall formwork support system is completed, the wall concrete pouring construction is carried out.

[0043] After the structural wall reinforcement is tied, holes are made on the formwork 11 at the positions of the tie bolts 4, and the formwork positioning reinforcement 5 is welded on the tie bolts 4. After the spacer 9 is installed, the formwork 11 is installed. The formwork 11 uses the positioning reinforcement 5 to ensure the wall thickness.

[0044] Install the wooden joists 10 and the reinforcing steel pipes 13 according to the template scheme requirements. Fix the steel pipes 13 with the mountain-shaped clips 8 and tighten the nuts 7.

[0045] 5) Pour concrete for the structural walls;

[0046] After the concrete of the structural wall reaches the conditions for demolding, remove the nuts 7, the mountain-shaped clips 8, the reinforcing steel pipes 13, the wooden joists 10 and the formwork 11 in sequence, and cut off the excess tie bolts 4 and apply anti-corrosion paint.

[0047] This invention utilizes timber back bracing, steel pipe 10, U-shaped clamps 8, and nuts 7 to secure the template 11, forming a stable and reliable wall template support system. Installation and adjustment are convenient, reducing construction steps; the structure is stable, which helps ensure construction quality; it reduces the number of chiseling operations, facilitates structural connections, and provides stable template support reinforcement, reducing the need for supporting reinforcement materials and labor; the structure is safer and more reliable, significantly improving construction efficiency.

[0048] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A construction method for a single-sided formwork wall structure with underground support structure, characterized in that, The construction structure includes embedded parts, tie bolts, and structural connecting steel bars. The embedded parts are fixedly connected to the stress-bearing steel bars of the support structure. The tie bolts and the structural connecting steel bars are welded to the embedded parts. The structural connecting steel bars are welded and fixed to the stress-bearing steel bars of the structural wall. The embedded parts are cast in the support structure. The other end of the tie bolt is connected to the formwork through fasteners, and concrete is cast between the formwork and the support structure. The embedded parts include embedded part anchoring steel bars and embedded part steel plates. The embedded part anchoring steel bars are welded and fixed to the embedded part steel plates, and the embedded part anchoring steel bars are welded and fixed to the stress-bearing steel bars of the support structure. The structural connecting steel bars are in a "U" shape. The "U"-shaped end face of the structural connecting steel bars is welded and fixed to the embedded part steel plate, and the two sides of the "U" shape are welded and fixed to the stress-bearing steel bars of the structural wall. Pads are provided between the formwork and the support structure. The fasteners include U-shaped clips and nuts. Wooden battens are longitudinally placed on the outer side of the formwork, and steel pipes are transversely added outside the wooden battens. The steel pipes are fixed with U-shaped clips, and the U-shaped clips are locked and fixed to the tie bolts through nuts. The construction method includes the following method steps: 1) Weld the embedded part anchoring steel bars to one side of the embedded part steel plate, and then weld the embedded part anchoring steel bars to the stress-bearing steel bars of the support structure. 2) After the support structure is cast and the earthwork excavation is completed, remove the redundant concrete on the other surface of the embedded part steel plate; weld the structural connecting steel bars and the tie bolts to the embedded part steel plate. 3) Bind the steel reinforcement cage of the wall structure, and weld the structural connecting steel bars and the stress-bearing steel bars of the wall structure into a whole. 4) Install the inner formwork of the wall. The formwork is fastened to the tie bolts. After the wall formwork support system is completed, carry out the construction of wall concrete casting.

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