Side wall deformation joint assembly type formwork system

Abstract

A side wall deformation joint assembly type formwork system relates to the technical field of constructional engineering and comprises an assembly type formwork mechanism and a side wall deformation joint end wall reinforcing mechanism, and the assembly type formwork mechanism is connected with a reinforcement cage of a side wall to be poured on one side through a formwork supporting structure. The side wall deformation joint end wall reinforcing mechanism comprises a U-shaped structure formed by connecting steel pipes, the two side arms of the U-shaped structure are fixedly connected with the ends of opposite-pull screws of the side wall to be poured through connecting pieces correspondingly, and the ends of the U-shaped structure are connected with the ends, away from the side wall to be poured, of the assembly type formwork mechanisms in a fastened mode through formwork supporting structures. The multiple sets of side wall deformation joint end wall reinforcing mechanisms are evenly distributed in the height direction of the side wall. By arranging the assembly type formwork structure, it is guaranteed that the position of the water stop belt is accurate and not prone to change; the rigidity of an end wall formwork anchoring structure is enhanced, and end wall formwork expansion is prevented.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, specifically to a prefabricated formwork system for side wall expansion joints. Background Technology

[0002] In the construction of underpasses and U-shaped channel sidewalls for large box culverts in buildings, municipal projects, and airports, expansion joints are often installed at regular intervals in the concrete structure. These expansion joints are crucial for structural waterproofing and are considered weak points prone to leakage, thus requiring special attention during construction. The main problems with current construction techniques for sidewall expansion joint formwork are as follows:

[0003] 1. Inaccurate control of waterstop position. Because the side wall has a central rubber waterstop and a bottom plate back-attached waterstop at the expansion joint, and the vertical reinforcement is relatively dense, the traditional loose formwork process is not easy to splice; at the same time, the inner and outer formwork on both sides of the central waterstop are supported in sections, which can easily lead to deviation of the waterstop position and poor accuracy.

[0004] 2. Large deformation at the end wall of the side wall expansion joint. Due to the difficulty of setting up formwork at this location, conventional formwork technology often involves welding tie rods to the vertical reinforcement of the side wall. However, the insufficient rigidity of the tie rods at the anchoring end leads to large deformation of the formwork. Furthermore, the joints are not tight, resulting in frequent bulging and deformation of the end wall of the side wall expansion joint. This, in turn, affects the waterproof performance of the waterstop components, leading to a high risk of water leakage.

[0005] 3. Traditional formwork erection and dismantling processes are inefficient. Formwork, timber or steel pipe supports are dismantled piece by piece, and inner and outer formwork are secured in sections. This involves many procedures, high labor costs, low mechanization, poor turnover, and high labor costs. Utility Model Content

[0006] This invention discloses a prefabricated formwork system for side wall expansion joints. By setting up a prefabricated formwork structure, it ensures the accurate and stable position of the waterstop; enhances the rigidity of the end wall formwork anchoring structure to prevent end wall bulging; and simultaneously achieves convenient operation and improves construction efficiency, ultimately ensuring the quality of waterproof construction of side wall expansion joints and realizing the goal of green and environmentally friendly construction.

[0007] To achieve the above objectives, the technical solution of this invention is as follows:

[0008] A prefabricated formwork system for sidewall expansion joints includes a prefabricated formwork mechanism and a sidewall expansion joint end wall reinforcement mechanism. The prefabricated formwork mechanism is connected to the reinforcing cage of the sidewall to be poured on one side through a formwork support structure. The sidewall expansion joint end wall reinforcement mechanism includes a U-shaped structure made of steel pipes. The two arms of the U-shaped structure are respectively fixedly connected to the ends of the tie rods of the sidewall to be poured through connectors. The end of the U-shaped structure is fastened to the end of the prefabricated formwork mechanism away from the sidewall to be poured through a formwork support structure. Multiple sets of the sidewall expansion joint end wall reinforcement mechanism are provided and evenly distributed along the height direction of the sidewall.

[0009] Preferably, the prefabricated template mechanism includes a left template structure and a right template structure. The left template structure and the right template structure are each assembled from several template units. Adjacent template units are connected and fixed by a woodworking mold clamp. The connecting ends of the left template structure and the right template structure are also connected and fixed by a woodworking mold clamp. A pad is provided between the left template structure and the right template structure. One end of the pad is fixedly connected to the end of the left template structure or the end of the right template structure. A central rubber waterstop is provided on one side of the pad and between the connecting ends of the left template structure and the right template structure. A back-adhesive rubber waterstop is provided on the outer end of the right template structure.

[0010] Preferably, the template unit includes a back template and several transverse wooden ribs that are arranged horizontally at the front end of the back template and evenly distributed longitudinally. The left template structure and the right template structure are connected into an integral structure by vertical continuous wooden ribs that are fixedly connected to the back template and the ends of the transverse wooden ribs at both ends. The woodworking mold clamp is connected between the transverse wooden ribs of adjacent template units or between the vertical continuous wooden ribs of the left template structure and the right template structure. The pad is fixedly connected to the outer surface of the vertical continuous wooden ribs at the opposite end of the left template structure or the right template structure.

[0011] Preferably, the vertical continuous timber is connected and fixed to the back template and the horizontal timber ribs by perforated angle steel and self-tapping screws.

[0012] Preferably, the front end of the U-shaped structure is composed of two horizontally arranged first steel pipes, and each side arm of the U-shaped structure is composed of two horizontally arranged second steel pipes that form a 90-degree angle with the first steel pipes. The contact ends of adjacent first and second steel pipes are connected and fixed by right-angle fasteners.

[0013] Preferably, the template support structure includes anchoring diagonal braces. The two ends of the anchoring diagonal braces are welded with angled steel bars to form a Z-shaped structure. One end of the Z-shaped structure is welded and fixed to the horizontal steel bars on the same side of the side wall reinforcement cage to be poured. The other end of the Z-shaped structure is welded to one end of a water-stop tie rod that passes through the prefabricated template mechanism. A water-stop pad is provided on the rod body located on the side of the side wall to be poured. The end of the water-stop tie rod away from the side wall to be poured passes through the gap between the two first steel pipes at the front end of the U-shaped structure and is connected and fixed to the first steel pipes by a butterfly clip and a nut.

[0014] Preferably, the bending angle at both ends of the anchoring tie bar is 15°-30°, the height of the water-stop tie bar connected by the Z-shaped structure is the same as that of the horizontal bar, and the lap joint area of ​​the horizontal bar is at least 30mm long and welded for at least 30mm.

[0015] Preferably, the inner side of the second steel pipe abuts against the wooden ribs of the side wall erected outside the side wall to be poured.

[0016] Preferably, a wooden template is provided at the joint between the outer ends of the left template structure and the right template structure and the side wall template. The wooden template abuts against the inner surface of the side wall template on the outer side of the back template, and the wooden template is connected and fixed to the adjacent side wall template by a woodworking mold clamp.

[0017] This novel prefabricated formwork system for sidewall expansion joints has the following beneficial effects:

[0018] 1. This new type of reinforced side wall end formwork tie rod anchoring end component strengthens the rigidity, reduces the deformation rate, improves the construction quality of the end concrete at the side wall deformation joint, and reduces the risk of water leakage.

[0019] 2. This new type of construction utilizes the concept of prefabricated construction, combining templates into a prefabricated structure, which facilitates hoisting, turnover, and installation, reduces numerous traditional procedures, and improves work efficiency.

[0020] 3. This new type of equipment makes full use of on-site tower cranes and other hoisting equipment to speed up the installation and dismantling process, improve the efficiency of tower crane construction and the level of mechanization, and reduce the construction period by about 1 / 3 to 1 / 2 compared with traditional installation and dismantling processes.

[0021] 4. This new type of work improves efficiency and speeds up progress while significantly reducing labor costs, by about 2 / 5 compared to traditional template processes.

[0022] 5. This new type of template adopts a prefabricated template structure, which reduces material consumption and enables multiple and recyclable use of materials, resulting in significant material savings and reduced consumption. Compared with traditional template technology, it saves 1 / 4 of the materials, achieving green and material-saving construction. Attached Figure Description

[0023] Figure 11. Diagram of the anchoring diagonal brace at the end of the side wall of this novel type;

[0024] Figure 2 Standard block diagram of this new type of prefabricated template mechanism;

[0025] Figure 3 , this new type Figure 2 Cross-sectional view of the prefabricated template mechanism along line 1-1;

[0026] Figure 4 A schematic diagram of the assembly of this new type of prefabricated template mechanism;

[0027] Figure 5 1. Cross-sectional view of the installation of this new type of prefabricated template mechanism (top view);

[0028] Figure 6 Schematic diagram of the connection of the anchoring diagonal braces at both ends of the side wall of this novel type;

[0029] Figure 7 , this new type Figure 5 Sectional view of the prefabricated template mechanism along direction 2-2.

[0030] Illustration labels: 1—Anchoring tie bar, 1-1—Reinforcing bar, 1-2—Welded angled reinforcing bar, 2—Assembled formwork mechanism, 2-1—Back formwork, 2-2—Horizontal timber ribs, 2-3—Vertical continuous timber, 2-4—Angle steel with holes and self-tapping screws, 2-5—Backing plate, 2-6—Carpenter formwork clamp, 3—Water-stop tie rod, 3-1—Water-stop pad, 3-2—Outer section of water-stop tie rod, 3-3—Butterfly clip and nut, 4—Steel pipe, 5—Right angle Fasteners, 6—Central rubber waterstop, 7—Back-adhesive rubber waterstop, 8—Vertical reinforcement, 9—Horizontal reinforcement, 10—Spacer block, 11—Side wall formwork, 12—Side wall timber rib, 13—Connector, 14—500mm guide line on the already poured base plate, 15—Side wall area to be poured, 16—Side wall area to be poured later, 17—30mm long welded lap joint of horizontal reinforcement, 18—Timber formwork, 19—Formwork unit, 20—Tie rod. Detailed Implementation

[0031] The following is a detailed description of the embodiments of the present invention in a step-by-step manner. This description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this invention.

[0033] Example 1

[0034] A prefabricated formwork system for side wall expansion joints, such as Figure 1-7 As shown, it includes a prefabricated formwork mechanism 2 and a side wall expansion joint end wall reinforcement mechanism. The prefabricated formwork mechanism 2 is connected to the steel cage of the side wall to be poured on one side through a formwork support structure. The side wall expansion joint end wall reinforcement mechanism includes a U-shaped structure connected by steel pipes 4. The two arms of the U-shaped structure are respectively fixedly connected to the ends of the tie rods 20 of the side wall to be poured through connectors. The end of the U-shaped structure is fastened to the end of the prefabricated formwork mechanism 2 away from the side wall to be poured through a formwork support structure. The side wall expansion joint end wall reinforcement mechanism is provided in multiple sets and is evenly distributed along the height direction of the side wall.

[0035] In this embodiment, the problem described in Section 2 of the background section, namely, "large deformation at the end wall of the side wall expansion joint, is effectively solved by setting up a reinforcement mechanism for the end wall of the side wall expansion joint," is addressed. Given the difficulty of setting up formwork at this location, conventional formwork techniques often involve welding tie rods to the vertical reinforcing bars of the side wall. Insufficient stiffness of the anchoring end tie bars leads to large formwork deformation, and the joints are not tight, resulting in frequent bulging and deformation of the end wall of the side wall expansion joint. This, in turn, affects the waterproofing performance of the waterstop components, leading to a high risk of leakage. Therefore, the prefabricated formwork mechanism solves the defects caused by the piecemeal construction method.

[0036] Example 2

[0037] like Figure 1-4 As shown, the prefabricated template mechanism includes a left template structure and a right template structure. The left and right template structures are each composed of several template units 19. Adjacent template units 19 are connected and fixed by a woodworking mold clamp 2-6. The connecting ends of the left and right template structures are also connected and fixed by the woodworking mold clamp 2-6. A pad 2-5 (such as...) is also provided between the left and right template structures. Figure 3 As shown in the figure, one end of the pad 2-5 is fixedly connected to the end of the left template structure or the end of the right template structure. A middle rubber waterstop 6 is provided on one side of the pad 2-5 and between the connecting ends of the left template structure and the right template structure. A back-adhesive rubber waterstop 7 is provided on the outer end of the right template structure.

[0038] like Figure 3 As shown, the template unit 19 includes a back template 2-1 and several transverse wooden ribs 2-2 that are arranged horizontally at the front end of the back template 2-1 and evenly distributed longitudinally. The left template structure and the right template structure are connected into an integral structure by vertical continuous wooden ribs 2-3 that are fixedly connected to the back template 2-1 and the ends of the transverse wooden ribs 2-2 at both ends. The woodworking mold clamp 2-6 is connected between the transverse wooden ribs 2-2 of the upper and lower adjacent template units 19 or between the vertical continuous wooden ribs 2-3 of the left template structure and the right template structure. The pad 2-5 is fixedly connected to the outer surface of the vertical continuous wooden ribs 2-3 at the opposite end of the left template structure or the right template structure.

[0039] like Figure 2 As shown, the vertical continuous timber 2-3 is connected and fixed to the back template 2-1 and the horizontal timber ribs 2-2 by perforated angle steel and self-tapping screws 2-4.

[0040] Example 3

[0041] like Figure 5 , 7 As shown, the front end of the U-shaped structure is composed of two horizontally arranged first steel pipes, and each side arm of the U-shaped structure is composed of two horizontally arranged second steel pipes that are at a 90-degree angle to the first steel pipes. The contact ends of adjacent first and second steel pipes are connected and fixed by right-angle fasteners 5.

[0042] like Figure 1 , 5 As shown, the template support structure includes an anchoring tie bar 1. The two ends of the anchoring tie bar 1 are welded with angled steel bars 1-2 to form a Z-shaped structure. One end of the Z-shaped structure is welded and fixed to the horizontal steel bar 9 on the same side as the steel cage of the side wall to be poured. The other end of the Z-shaped structure is welded to one end of the water-stop tie rod 3 used to pass through the prefabricated template mechanism. The water-stop tie rod 3 is provided with a water-stop pad 3-1 on the rod body on the side of the side wall to be poured. The end of the water-stop tie rod 3 away from the side wall to be poured passes through the gap between the two first steel pipes at the front end of the U-shaped structure and is connected and fixed to the first steel pipe by a butterfly clip and nut 3-3.

[0043] Example 4

[0044] like Figure 1 As shown, the bending angles at both ends of the anchoring tie bar are 15°-30°. The height of the water-stop tie rod 3 connected by the Z-shaped structure is the same as that of the horizontal bar 9. The lap joint area of ​​the horizontal bar 9 is at least 30mm long and is welded for at least 30mm in length to ensure the strength of the lateral tensile force provided.

[0045] like Figure 5As shown, the inner side of the second steel pipe abuts against the wooden ribs 12 of the side wall surface erected outside the side wall to be poured.

[0046] like Figure 5 As shown, wooden templates 18 are provided at the joints between the outer ends of the left and right template structures and the side wall templates 11. The wooden templates 18 abut against the inner surface of the side wall templates 11 on the outer side of the back template 2-1. The wooden templates 18 are connected and fixed to the adjacent side wall templates 11 by a woodworking mold clamp 2-6, which protects the back-attached waterstop and helps prevent grout leakage at the corners of the side walls.

[0047] How to use this new invention:

[0048] 1. During the side wall reinforcement construction stage, the anchoring tie bars and prefabricated formwork mechanism should be processed simultaneously. The anchoring tie bars can be pre-welded to the ends of the waterstop tie rods to facilitate assembly and installation. See [link to documentation]. Figure 1 , Figure 2 .

[0049] 2. After the steel reinforcement passes inspection, weld the anchoring diagonal bracing to the horizontal steel reinforcement, and weld the lap joints of the horizontal reinforcement. Then install the central waterstop.

[0050] 3. Hoisting and assembling prefabricated formwork mechanism, see Figure 4 After the prefabricated template mechanism is in place, the verticality is checked.

[0051] 4. Install back-attached waterstops, side wall formwork, timber, and waterstop tie rods. After the dimensions, position, verticality, and flatness of the formwork are accurately checked, tighten the end faces and back braces of the side wall as a whole.

[0052] 5. Finally, securely fasten the first and second steel pipes at the intersection of the end face and the large back rib of the side wall using right-angle fasteners. See Figure 5 , Figure 6 , Figure 7 .

[0053] 6. Once the side walls are cast and the conditions for demolding are met, the formwork can be removed, following the principle of removing the first erected formwork last and the last erected formwork first. The combined formwork is lifted out using hoisting equipment. The combined formwork is then tidied up, and a release agent is applied to the side in contact with the concrete. All completed prefabricated components are then hoisted to the next construction section for reuse.

Claims

1. A sidewall deformation joint fabricated formwork system, characterized by: The assembly type formwork mechanism is connected with the reinforcement cage of the side wall to be cast through a formwork support structure, and the side wall deformation joint end wall reinforcing mechanism includes a U-shaped structure formed by connecting steel pipes, the two side arms of the U-shaped structure are respectively fixedly connected with the ends of the opposite pulling screw rods of the side wall to be cast through connecting pieces, the end of the U-shaped structure is fixedly connected with the end of the assembly type formwork mechanism away from the side wall to be cast through the formwork support structure, and the side wall deformation joint end wall reinforcing mechanism is provided with multiple groups and is uniformly distributed along the height direction of the side wall.

2. A side wall deformation joint fabricated formwork system as claimed in claim 1, characterized in that: The assembly type formwork mechanism includes left and right formwork structures, the left and right formwork structures are respectively formed by splicing a plurality of formwork units, the adjacent formwork units are fixedly connected through a carpenter jointing device, the connecting ends of the left and right formwork structures are also fixedly connected through the carpenter jointing device, and a backing plate is further arranged between the left and right formwork structures, one end of the backing plate is fixedly connected with the end of the left formwork structure or the end of the right formwork structure, a middle rubber waterstop is arranged on the side of the backing plate and between the connecting ends of the left and right formwork structures, and a back-sticking type rubber waterstop is arranged at the outer end of the right formwork structure.

3. A side wall deformation joint fabricated formwork system as claimed in claim 2, characterized in that: The formwork unit includes a back formwork, a plurality of transverse wood rib ribs arranged at the front end of the back formwork in the transverse direction and uniformly distributed in the longitudinal direction, the left and right formwork structures are connected into an integral structure by vertically extending wood through the two ends of the transverse wood rib ribs and fixedly connected with the back formwork and the end of the transverse wood rib rib, the carpenter jointing device is connected between the transverse wood rib ribs of the adjacent formwork units or between the adjacent vertically extending wood of the left and right formwork structures, and the backing plate is fixedly connected with the outer surface of the vertically extending wood at the opposite end of the left formwork structure or the right formwork structure.

4. A side wall deformation joint fabricated formwork system as claimed in claim 3, characterized in that: The vertically extending wood is fixedly connected with the back formwork and the transverse wood rib rib through the angle steel with holes and self-tapping screws.

5. A side wall deformation joint fabricated formwork system as claimed in claim 4, characterised in that: The front end of the U-shaped structure is formed by two transversely arranged first steel pipes, each side arm of the U-shaped structure is formed by two horizontally arranged second steel pipes with an included angle of 90 degrees with the first steel pipe, and the contact ends of the adjacent first steel pipe and second steel pipe are fixedly connected through a right-angle fastener.

6. A side wall deformation joint fabricated formwork system as claimed in claim 5, characterised in that: The formwork support structure includes an anchoring cable-stayed rib, the two ends of the anchoring cable-stayed rib are connected into a Z-shaped structure through a welded angle steel, one end of the Z-shaped structure is fixedly welded with the horizontal reinforcement of the same side of the side wall to be cast, and the other end of the Z-shaped structure is welded with one end of a waterstop pulling rod penetrating through the assembly type formwork mechanism, the waterstop pulling rod is provided with a waterstop pad on the rod body on the side of the side wall to be cast, and the end of the waterstop pulling rod away from the side wall to be cast penetrates through the gap between the two first steel pipes at the front end of the U-shaped structure and is fixedly connected with the first steel pipe through a butterfly clamp and a nut.

7. A side wall deformation joint panelized formwork system as claimed in claim 6, characterized in that: The angle of the two ends of the anchoring cable-stayed rib is 15°-30°, the waterstop pulling rod connected with the Z-shaped structure has the same height as the horizontal rib, and the binding overlap area of the horizontal rib is at least 30 mm long and is welded for at least 30 mm long.

8. A side wall deformation joint fabricated formwork system as claimed in claim 7, characterised in that: The second steel pipe is in contact with the side wall face wooden rib outside the side wall to be poured.

9. A side wall deformation joint panelized formwork system as claimed in claim 8, characterized in that: The outer side end of the left and right template structures is provided with a wooden template at the joint of the side wall face template, the wooden template is in contact with the inner surface of the side wall face template outside the back template, and the wooden template and the adjacent side wall face template are connected and fixed through a carpenter joint device.

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