Shear wall formwork tie-and-position screw structure and its construction method

Abstract

The present invention discloses a shear wall formwork tie-and-position screw structure and its construction method, aiming to overcome the shortcomings of existing shear wall construction methods in that they are unable to meet the construction requirements of walls with arc or inclined structural features. The invention provides a shear wall formwork tie-and-position screw structure and its construction method, capable of meeting the requirements of single-sided formwork construction for walls with a combination of arc or inclined features. The structure comprises a screw body, one end of which is provided with a formwork clamping structure, and the other end of which is provided with a steel bar positioning structure. The formwork clamping structure comprises a U-shaped fastening clip mounted on the screw body and a detachable positioning plastic conical block. The steel bar positioning structure comprises a pair of steel bar locator clips arranged along the axial direction of the screw body.

Description

Technical Field

[0001] The invention relates to the technical field of shear wall construction, in particular to a shear wall formwork tie-and-position screw structure and a construction method thereof. Background Art

[0002] With the development of urban construction, a large number of new buildings are developing towards being tall, large and odd-shaped. The inclined shear walls of the basement exterior walls are also widely used in construction. At present, the construction methods are summarized into two construction methods: leaving a fertilizer trough when excavating earth and not leaving a fertilizer trough.

[0003] The two construction methods are evolved. The construction method with a fertilizer trough can only use double-sided formwork, while the construction method without a fertilizer trough can only use single-sided formwork.

[0004] Double-sided formwork would require the excavation of a fertilizer trough, a significant engineering effort. The backfill in the trough would be difficult to compact, making exterior waterproofing of the sloped wall difficult. Furthermore, the limited site space and construction difficulties prevented the use of double-sided formwork for this project.

[0005] Therefore, the only method currently available is single-sided formwork for vertical walls. However, for walls with curved or inclined structures, the conventional single-sided formwork method for vertical walls cannot meet on-site construction requirements. Summary of the Invention

[0006] The present invention aims to overcome the shortcomings of the shear wall construction method in the prior art that it cannot meet the construction requirements of walls with arc or inclined structural characteristics, and provides a shear wall formwork tie-positioning screw structure and its construction method, which can meet the needs of single-sided formwork construction of walls with arc or inclined characteristics.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] The present invention provides a shear wall formwork tie-and-position screw structure, comprising a screw body, one end of the screw body being provided with a formwork clamping structure, and the other end of the screw body being provided with a steel bar positioning structure, the formwork clamping structure comprising a U-shaped fastening clip and a detachable positioning plastic conical block sleeved on the screw body, and the steel bar positioning structure comprising a pair of steel bar locator clips arranged axially along the screw body.

[0009] Preferably, the opening side of the U-shaped structure of the U-shaped fastening card faces the detachable positioning plastic conical round block, and the bottom side of the frustum-shaped structure of the detachable positioning plastic conical round block faces the U-shaped fastening card.

[0010] Preferably, a nut is sleeved on the outer side of the U-shaped fastening clamp of the screw body, and a positioning piece is sleeved on the inner side of the detachable positioning plastic conical block of the screw body.

[0011] Preferably, two pairs of steel bar locator clips are provided along the screw body, and a water stop plate is provided on the screw body between the two pairs of steel bar locator clips.

[0012] Preferably, a top plate is provided at the end of the screw body at one end where the steel bar locator clip is provided.

[0013] A method for constructing a shear wall formwork tie-and-position screw structure according to the present invention comprises the following steps:

[0014] Step 1: First, pour the foundation slab, reserve anti-floating anchors during the concrete pouring process of the foundation slab, and construct a cushion layer on the surface of the original soil of the fertilizer trough;

[0015] Step 2: Tie the shear wall reinforcement, use tie wire to secure the installation pad on the shear wall reinforcement, and use tie wire to secure the top piece at the end of the screw body and the pad to the inclined wall concrete cushion layer;

[0016] Step 3: Install the formwork, pass the main body of the tie-and-position screw through the formwork, clamp the formwork and the keel with the U-shaped fastening clip and the detachable positioning plastic conical round block, clamp the shear wall steel bars with the steel bar locator, and use a 25mm diameter steel bar as the transverse keel. The transverse keel is clamped and positioned on the formwork surface by the U-shaped fastening clip of the tie-and-position screw;

[0017] Step 4: Use a combination of bracing and pulling to support the formwork. During formwork construction, the support system of the arc-shaped inclined wall is supported on the inner wall to increase the stability of the support system. The formwork is fixed to the inner wall by pulling with steel wire ropes.

[0018] Step 5, pour concrete into the space inside the formwork. Before closing the wall mold, insert the vibrating rods into the double rows of shear wall steel bars of the wall. The vibrating rods are spaced 1m apart. When pouring concrete, vibrate while pulling out the vibrating rods. As the concrete pouring height increases, pull out the vibrating rods one by one.

[0019] The technical solution of the present invention simultaneously fixes the formwork, vertical keels, transverse keels, and shear wall reinforcement into a whole by means of a tie-and-tie positioning screw structure, thereby enabling the construction of a wall with a combination of arc or inclined features by a single-sided formwork construction method. The U-shaped fastening clip and the detachable positioning plastic conical round block are used to clamp the formwork and the vertical keel. The U-shaped structure of the U-shaped fastening clip is used to clamp the transverse keel. The reinforcement locator clip is used to clamp the shear wall reinforcement. The above structure enables the formwork, vertical keels, transverse keels, and shear wall reinforcement to form a stable construction structure, which can be used as both an inclined shear wall formwork and an arc-shaped shear wall formwork. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1This is a schematic diagram of the shear wall formwork tie-and-position screw structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the shear wall formwork tie-and-position screw structure and its construction method in use according to the present invention.

[0022] Markings in the figure: 1. Formwork; 2. Horizontal keel reinforcement; 4. Support system; 5. Ground anchor; 6. Foundation base plate; 7. Shear wall reinforcement; 8. Pad layer; 9. Pad block; 10. Fertilizer trough soil; 3. Screw body; 31. Nut; 32. U-shaped fastening clip; 33. Removable positioning plastic conical block; 34. Positioning plate; 35. Rebar locator card; 36. Top plate; 37. Water stop. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1 As shown, a shear wall formwork tie-and-position screw structure of the present invention includes a screw body 3, one end of the screw body 3 is provided with a formwork clamping structure, and the other end of the screw body 3 is provided with a steel bar positioning structure, the formwork clamping structure includes a U-shaped fastening clip 32 and a detachable positioning plastic conical block 33 which are sleeved on the screw body 3, and the steel bar positioning structure includes a pair of steel bar locator clips 35 arranged axially along the screw body 3.

[0025] The opening side of the U-shaped structure of the U-shaped fastening fixture 32 faces the detachable positioning plastic conical block 33 , and the bottom side of the truncated cone structure of the detachable positioning plastic conical block 33 faces the U-shaped fastening fixture 32 .

[0026] The screw body 3 is provided with a nut 31 on the outer side of the U-shaped fastening clamp 32 , and the screw body 3 is provided with a positioning piece 34 on the inner side of the detachable positioning plastic conical block 33 .

[0027] Two pairs of steel bar locator clips 35 are provided along the screw body 3 , and a water stop 37 is provided between the two pairs of steel bar locator clips 35 on the screw body 3 .

[0028] A top plate 36 is provided at the end of the screw body 3 where the steel bar positioner clip is provided.

[0029] like Figure 2 As shown, the present invention also provides a method for constructing a shear wall formwork tie-and-position screw structure. This embodiment is a specific application example of the above-mentioned shear wall formwork tie-and-position screw structure in shear wall construction. The construction method includes the following steps:

[0030] Step 1: first pour the foundation slab 6, reserve anti-floating anchors 5 during the concrete pouring process of the foundation slab 6, and construct a cushion layer 8 on the surface of the original soil 10 of the fertilizer tank.

[0031] Step 2: Tie the shear wall reinforcement 7, tie the shear wall reinforcement 7 with a tie wire to secure the installation pad 9, and tie the top plate 36 at the end of the screw body 3 and the pad 9 with a tie wire to press them against the inclined wall concrete cushion 8.

[0032] Step 3, install the formwork, pass the screw body 3 of the tie positioning screw through the formwork 1, so that the U-shaped fastening clamp 32 and the detachable positioning plastic conical block 33 clamp the formwork 1 and the keel, and the steel bar locator clamp 35 clamps the shear wall steel bar 7. Use steel bars with a diameter of 25mm as the transverse keel 2. The transverse keel 2 is clamped and positioned on the formwork surface by the U-shaped fastening clamp 32 of the tie positioning screw.

[0033] In this embodiment, the tie-and-position screw body 3 has a diameter of 16 mm. A 10 mm diameter, 25 mm long steel bar locator 35 is used to secure the tie-and-position screw 3 to the horizontal steel bars inside and outside the shear wall. A 40 × 40 × 2 mm top plate 36 at the end of the tie-and-position screw 3 is tied to a precast reinforced concrete pad 9 with wire and secured to the inclined wall concrete cushion 8. To prevent water seepage, a 2 mm thick, 50 × 50 mm long and wide water stop 37 is positioned in the middle of the steel bar locator 35. The locating plate 34 has a diameter of 30 mm and a thickness of 2 mm. The tie-and-position screw body 3 extends through the through-wall bolt hole in the formwork 1. The end of the tie-and-position screw body 3 is connected to a U-shaped fastener 32 measuring 142.6 mm long, 80 mm wide, and 15 mm thick, connecting the formwork and the keel. The tie-and-position screw also controls the thickness of the steel bar cover and the cross-sectional dimensions of the wall.

[0034] The arc wall formwork uses 25mm diameter steel bars as horizontal keels. A 1:1 model is created on site based on the radius of the arc wall. The steel bars are then machined to the model's curvature. The vertical keels are constructed from double steel pipes with a wall thickness of at least 3.24mm and a diameter of 48mm. The horizontal steel bar keels are placed on the inside, while the vertical steel pipe keels are placed on the outside.

[0035] Step 4: Support the formwork 1 by combining bracing and pulling. During the construction of the formwork 1, the four supports of the arc-shaped inclined wall are placed on the inner wall to increase the stability of the support system. The formwork 1 is fixed to the inner wall by pulling with steel wire ropes.

[0036] The arc-shaped inclined wall uses 18mm thick formwork, which is assembled from one end, with 100*100mm wooden planks at the back. The formwork must be aligned and adjusted as it is installed, followed by the installation of various connectors, supports, and temporary supports.

[0037] Step 5, pour concrete into the space inside the template. Before the wall is molded, insert the vibrating rods into the double rows of shear wall steel bars 7 of the wall. The vibrating rods are spaced 1m apart. When pouring concrete, vibrate while pulling out the vibrating rods. As the concrete pouring height increases, pull out the vibrating rods one by one.

[0038] Before formwork construction, a special construction plan is prepared, and workers are briefed on the installation of the new "pull-joint positioning reinforcement." Tilt and smoothness are checked. To check tilt, a 50cm control line is drawn between the top and bottom edges of the formwork. To check smoothness, a 0.8m long straightedge is placed horizontally against the wall and a feeler gauge is used.

[0039] The technical solution of the present invention simultaneously fixes the formwork, vertical keels, transverse keels, and shear wall reinforcement into a whole by means of a tie-and-tie positioning screw structure, thereby enabling the construction of a wall with a combination of arc or inclined features by a single-sided formwork construction method. The U-shaped fastening clip and the detachable positioning plastic conical round block are used to clamp the formwork and the vertical keel. The U-shaped structure of the U-shaped fastening clip is used to clamp the transverse keel. The reinforcement locator clip is used to clamp the shear wall reinforcement. The above structure enables the formwork, vertical keels, transverse keels, and shear wall reinforcement to form a stable construction structure, which can be used as both an inclined shear wall formwork and an arc-shaped shear wall formwork.

Claims

1. A construction method for a shear wall formwork tie-and-position screw structure, characterized in that: The shear wall formwork tie-and-position screw structure comprises a screw body (3), one end of the screw body (3) is provided with a formwork clamping structure, and the other end of the screw body (3) is provided with a steel bar positioning structure, the formwork clamping structure comprises a U-shaped fastening clamp (32) sleeved on the screw body (3) and a detachable positioning plastic conical round block (33), and the steel bar positioning structure comprises a pair of steel bar locator clamps (35) arranged axially along the screw body (3); The opening side of the U-shaped structure of the U-shaped fastening clamp (32) faces the detachable positioning plastic conical round block (33), and the bottom side of the truncated cone-shaped structure of the detachable positioning plastic conical round block (33) faces the U-shaped fastening clamp (32); The screw body (3) is provided with a nut (31) on the outer side of the U-shaped fastening clamp (32), and the screw body (3) is provided with a positioning piece (34) on the inner side of the detachable positioning plastic conical block (33); Two pairs of steel bar locator clips (35) are provided along the screw body (3), and a water stop (37) is provided between the two pairs of steel bar locator clips (35) on the screw body (3); The screw body (3) is provided with a top plate (36) at the end of one end provided with a steel bar locator clamp; The method comprises the following steps: Step 1: first pour the foundation slab (6), reserve anti-floating anchors (5) during the concrete pouring process of the foundation slab (6), and construct a cushion layer (8) on the surface of the original soil (10) of the fertilizer trough; Step 2, tying the shear wall reinforcement (7), tying the shear wall reinforcement (7) with a tie wire to securely install the pad (9), and tying the top plate (36) at the end of the screw body (3) and the pad (9) with a tie wire to securely press them onto the inclined wall concrete cushion (8); Step 3, install the template, pass the screw body (3) of the tie-and-position screw through the template (1), make the U-shaped fastening clamp (32) and the detachable positioning plastic conical round block (33) clamp the template (1) and the keel, and the steel bar positioner clamp (35) clamp the shear wall steel bar (7). Select a steel bar with a diameter of 25mm as the transverse keel (2), and the transverse keel (2) is clamped and positioned on the template surface by the U-shaped fastening clamp (32) of the tie-and-position screw; Step 4, using a combination of bracing and pulling to support the formwork (1). During the construction of the formwork (1), the support system (4) of the arc-shaped inclined wall is supported on the inner wall to increase the stability of the support system. The formwork (1) is pulled and fixed to the inner wall using steel wire ropes. Step 5, pouring concrete into the space inside the template. Before the wall is closed, insert the vibrating rod into the double rows of shear wall reinforcement (7) of the wall. The spacing between the vibrating rods is 1m. When pouring concrete, vibrate while pulling out the vibrating rods. As the concrete pouring height increases, pull out the vibrating rods one by one.

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