A method for preventing slurry flow during the construction of a laminated slab

Abstract

This application relates to a method for preventing grout leakage in composite slab construction. After the composite slab is installed and its compliance with standards is checked, truss reinforcement bars are pre-embedded above the composite slab. Connecting reinforcement bars are installed on the adjacent truss reinforcement bars on two adjacent composite slabs. Tie bolts are passed through a formwork, which is then placed between two composite slabs. The tie bolts are then hung on the connecting reinforcement bars to complete the pre-installation of the formwork. The nuts on the tie bolts are then tightened, causing the formwork to move upwards until it abuts against the composite slab, with both ends of the formwork abutting against the lower surfaces of the two composite slabs. This application has the effect of expanding the application range of the sealing test device.

Description

Technical Field

[0001] This application relates to the field of composite slab technology, and in particular to a method for preventing grout flow in composite slab strips. Background Technology

[0002] Prefabricated structures involve the industrial production of components in factories, which are then transported to the site for direct assembly. Standardized factory production ensures consistent quality, reduces dust and noise on-site, minimizes solid waste, reduces on-site personnel and material usage, and promotes green construction. Prefabricated exterior wall components include built-in insulation layers, eliminating the need for traditional scaffolding during main building construction. Compared to traditional cast-in-place structures, this method is more convenient, faster, and saves on overall construction time.

[0003] When constructing adjacent composite slab strips for prefabricated buildings, the area between adjacent composite slabs (slab strips) must be constructed using cast-in-place methods. The slab strips are typically constructed using formwork, with only double-sided adhesive tape applied to both sides to prevent grout leakage. Due to poor control of the flatness of the support structure, varying degrees of grout leakage or platforming occur during subsequent concrete pouring, making later repairs difficult and incurring repair costs. Summary of the Invention

[0004] To reduce the possibility of slurry flow, this application provides a method for preventing slurry flow in composite slab strips.

[0005] This application provides a construction method for preventing grout leakage in composite slab strips, employing the following technical solution: A method for preventing grout leakage in composite slab strips includes the following steps: Step 1: After the composite slab is installed and the composite standard is checked, truss reinforcement is pre-embedded above the composite slab, and connecting reinforcement is installed on the truss reinforcement that is close to each other on two adjacent composite slabs. Step 2: Insert the tie bolts into the formwork, then place the formwork between the two composite slabs, and then hang the tie bolts on the connecting steel bars to complete the pre-installation of the formwork. Step 3; Next, tighten the nuts on the tie bolts to move the template upwards until the template abuts against the composite plate, with both ends of the template abutting against the lower surfaces of the composite plates on both sides.

[0006] By adopting the above technical solution, connecting steel bars are arranged on the truss reinforcement, and tie bolts are used to reinforce the formwork from top to bottom, ensuring a tight fit between the formwork and the bottom surface of the composite slab. This results in neat edges and corners after concrete pouring, free from defects such as grout leakage. Using this anti-grout leakage reinforcement technology effectively avoids grout leakage at the slab sections of the composite slab, reducing potential maintenance costs and other hidden dangers caused by grout leakage or misaligned pouring.

[0007] Optionally, a plurality of connecting reinforcing bars are provided, the axial direction of the plurality of connecting reinforcing bars being parallel to the width direction of the gap between the two composite plates, and each connecting reinforcing bar being provided with a plurality of tie bolts.

[0008] By adopting the above technical solution, multiple connecting steel bars are provided, and each connecting steel bar is provided with several tie bolts, thereby improving the support of the formwork and thus improving the tightness of the fit between the formwork and the composite slab.

[0009] Optionally, the template is provided with a pressing component near the edge of the composite plate, and the nut of the tie bolt is provided with a driving component. When the nut of the tie bolt is tightened, the pressing component can be driven by the driving component to press the edge of the template.

[0010] By adopting the above technical solution, when tightening the bolts on the tie bolts, the pressing component can be driven by the driving component to press the edge of the template, thereby improving the tightness of the fit between the edge of the template and the composite plate, and further reducing the possibility of slurry leakage.

[0011] Optionally, the driving assembly includes a first link, a second link, and a third link. The first link is mounted on the nut of the tie bolt near the composite plate. The third link is mounted on the composite plate. The second link is located between the first link and the third link. One end of the first link is hinged to the nut, and the other end of the first link is hinged to the second link. The other end of the second link is hinged to the third link, and the other end of the third link is hinged to the composite plate. The pressing assembly is mounted on the second link. When the second link rotates, it can drive the pressing assembly to press the edge of the template.

[0012] By adopting the above technical solution, during installation, the nuts are pre-tightened. After being tightened to a certain extent, the first connecting rod, the second connecting rod, and the third connecting rod are installed. Then, the nuts are tightened further. At this time, the first connecting rod and the third connecting rod can drive the second connecting rod to rotate. When the second connecting rod rotates, it can drive the pressing component to press the edge of the template.

[0013] Optionally, the pressing assembly includes a first mounting seat and a second mounting seat, and the template is provided with a mounting rod. The first mounting seat is slidably connected to the mounting rod along the axial direction, and the second mounting seat is fixed to the second connecting rod. The first mounting seat and the second mounting seat are coaxially arranged, and when the second mounting seat rotates, it can force the first mounting seat to slide.

[0014] By adopting the above technical solution, after the second connecting rod rotates, it can drive the second mounting seat to rotate, thereby forcing the first mounting seat to slide towards the template, thereby pressing the edge of the template.

[0015] Optionally, a steel ball is fixed on the second mounting base, and the first mounting base is provided with a first locking groove for locking the steel ball. The first locking groove is arc-shaped and coaxial with the first mounting base. The depth of the first locking groove gradually decreases around the axis of the first mounting base.

[0016] By adopting the above technical solution, when the second mounting seat rotates, the steel ball will move in the locking groove. Since the depth of the first locking groove gradually decreases, it will force the first mounting seat to move closer to the template, thereby driving the first mounting seat to press against the edge of the template, thereby improving the tightness of the fit between the edge of the template and the composite plate.

[0017] Optionally, a first guide block is fixedly connected to the side of the first mounting base near the second mounting base, and a second guide block is fixedly connected to the side of the second mounting base near the first mounting base. A plurality of first and second guide blocks are provided, with the first guide blocks arranged in a circular array around the axis of the first mounting base, and the second guide blocks arranged in a circular array around the axis of the second mounting base. Adjacent first guide blocks have a gap for engaging with the second guide block. A first guide surface is provided on one side of the first guide block distributed along the circumference of the first mounting base, and the second guide block has a second guide surface adapted to the first guide surface. When the second mounting base rotates, the cooperation of the first and second guide surfaces forces the first mounting base to move towards the template.

[0018] Optionally, the template is provided with an installation groove, and a first capsule is provided in the installation groove. A powder package and a liquid package are provided in the first capsule at positions corresponding to the first mounting base. The powder package is filled with sodium bicarbonate and an inert gas, and the liquid package is filled with dilute hydrochloric acid liquid and an inert gas. The first mounting base is provided with a first extrusion block for crushing the liquid package.

[0019] By adopting the above technical solution, when the first mounting seat slides, the first extrusion block on the first mounting seat will crush the powder package and the liquid package, causing sodium bicarbonate and dilute hydrochloric acid to mix, thereby generating a large amount of gas, causing the first bladder to expand, thereby improving the sealing performance between the template and the composite plate, and thus reducing the possibility of slurry leakage.

[0020] Optionally, the template is provided with an elastic element, which is a spring, to force the first mounting seat to slide away from the template. The template has a recessed groove corresponding to the first mounting seat, and the spring is located in the recessed groove. The spring is coaxially sleeved on the mounting rod, with one end of the spring fixedly connected to the bottom wall of the recessed groove and the other end fixedly connected to the first mounting seat. The diameter of the recessed groove is smaller than the diameter of the first mounting seat, so that the first mounting seat can abut against the side of the template after sliding.

[0021] By adopting the above technical solution, the spring forces the first mounting seat to slide away from the template under normal conditions, thereby reducing the possibility of accidental contact.

[0022] In summary, the present invention has the following beneficial effects: 1. Connecting reinforcing bars are placed on the truss reinforcement, and tie bolts are used to reinforce the formwork from top to bottom, ensuring a tight fit between the formwork and the bottom surface of the composite slab. This results in neat edges and corners after concrete pouring, free from defects such as grout leakage. By using this anti-grout leakage reinforcement technology, grout leakage at the slab strips can be effectively avoided, reducing potential problems such as maintenance costs caused by grout leakage or misaligned pouring in the later stages. 2. When the first mounting base slides, the first extrusion block on the first mounting base will rupture the powder package and the liquid package, causing sodium bicarbonate and dilute hydrochloric acid to mix, thereby generating a large amount of gas, causing the first bladder to expand, thereby improving the sealing performance between the template and the composite plate, and thus reducing the possibility of slurry leakage. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of Example 1; Figure 2 This is a schematic diagram of the tie bolt structure in Example 1; Figure 3 This is a structural schematic diagram of Example 2; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram showing the position of the baffle in Embodiment 2; Figure 6 This is a schematic diagram of the structure of the first mounting base in Embodiment 3.

[0024] In the diagram, 1. Composite plate; 11. Truss reinforcement; 12. Connecting reinforcement; 13. Second locking groove; 14. Second extrusion block; 2. Template; 21. Settling groove; 22. Spring; 23. Mounting rod; 231. Limit key; 24. Mounting groove; 25. Clearance groove; 3. Tie bolt; 31. Screw; 32. Nut; 33. Connecting part; 4. Pressing assembly; 41. First mounting seat; 411. Keyway; 412. First locking groove; 413. Sliding hole; 414. First extrusion block; 415. First guide block; 42. Second mounting seat; 421. Steel ball; 422. Second guide block; 5. Drive assembly; 51. First connecting rod; 52. Second connecting rod; 53. Third connecting rod; 6. First capsule; 61. Powder package; 62. Liquid package; 63. Baffle. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0026] Example 1: This application discloses a method for preventing grout leakage in composite slab strip construction, including the following steps. Step 1: Refer to Figure 1 and Figure 2 After the composite slab 1 is installed and the composite standard is checked, truss steel bars 11 are pre-embedded above the composite slab 1, and connecting steel bars 12 are installed on the truss steel bars 11 that are close to each other on two adjacent composite slabs 1.

[0027] Several connecting reinforcing bars 12 are provided, and the axial direction of the connecting reinforcing bars 12 is distributed along the length direction of the gap between the two composite plates 1. The axial direction of the connecting reinforcing bars 12 is parallel to the width direction of the gap between the two composite plates 1. Each connecting reinforcing bar 12 is provided with several tie bolts 3, and the tie bolts 3 are distributed along the axial direction of the connecting reinforcing bar 12. In this embodiment, each connecting reinforcing bar 12 corresponds to two tie bolts 3.

[0028] Step 2: Refer to Figure 1 and Figure 2 The tie bolts 3 are inserted into the template 2, and then the template 2 is placed between the two composite plates 1. The tie bolts 3 are then hung on the connecting steel bars 12 to complete the pre-installation of the template 2.

[0029] Template 2 is located between two composite plates 1 and on the lower surface of composite plates 1. Tie bolt 3 includes screw rod 31 and nut 32. The axis of screw rod 31 is vertically arranged. When installing screw rod 31, screw rod 31 is inserted through template 2, and then the hook part at the upper end of screw rod 31 is hooked to connecting steel bar 12. Then nut 32 is threaded to screw rod 31. Nut 32 is located below template 2.

[0030] Step 3; Refer to Figure 1 and Figure 2 Then tighten the nut 32 to move the template 2 upward until the template 2 abuts against the composite plate 1. The two ends of the template 2 abut against the lower surface of the composite plate 1 on both sides. Tightening the nut 32 can improve the fit between the template 2 and the composite plate 1, thereby reducing the possibility of slurry leakage.

[0031] The implementation principle of Embodiment 1 of this application is as follows: connecting steel bars 12 are arranged on the truss steel bars 11, and the formwork 2 is reinforced from top to bottom by tie bolts 3, so that the formwork 2 is tightly attached to the bottom surface of the composite slab 1, thereby ensuring that the edges and corners of the concrete are neat and free from defects such as grout leakage after pouring. By using this anti-grout leakage reinforcement technology, the problem of grout leakage at the slab strip of the composite slab 1 can be effectively avoided, reducing a series of potential problems such as maintenance costs caused by grout leakage or misalignment of the pouring in the later stage.

[0032] Example 2: The difference between Example 2 and Example 1 is that, referring to Figure 3 The template 2 is provided with pressing components 4 on both sides of the edge near the composite plate 1. The pressing components 4 correspond to the tie bolts 3 respectively. The nut 32 of the tie bolt 3 is provided with a driving component 5. When the nut 32 is tightened, the pressing components 4 can be driven by the driving component 5 to press the edge of the template 2 towards the composite plate 1.

[0033] Reference Figure 3 The drive assembly 5 includes a first connecting rod 51, a second connecting rod 52, and a third connecting rod 53. The first connecting rod 51 is mounted on the nut 32 of the tie bolt 3 near the composite plate 1. The third connecting rod 53 is mounted on the composite plate 1, and the second connecting rod 52 is located between the first connecting rod 51 and the third connecting rod 53. A connecting portion 33 protrudes from the peripheral wall of the nut 32. One end of the first connecting rod 51 is hinged to the connecting portion 33, and the other end of the first connecting rod 51 is hinged to the second connecting rod 52. The other end of the second connecting rod 52 is hinged to the third connecting rod 53, and the other end of the third connecting rod 53 is hinged to the composite plate 1. A pressing assembly 4 is located on the side of the second connecting rod 52 near the template 2. When the second connecting rod 52 rotates, it drives the pressing assembly 4 to press the edge of the template 2, improving the tightness of the fit between the edge of the template 2 and the composite plate 1, thereby further reducing the possibility of slurry leakage.

[0034] Reference Figure 3 and Figure 4The pressing component 4 includes a first mounting base 41 and a second mounting base 42. A mounting rod 23 is fixedly connected to the template 2, and the axis of the mounting rod 23 is perpendicular to the plane of the template 2. A sliding hole 413 is coaxially provided on the first mounting base 41, and the mounting rod 23 slides through the sliding hole 413 along the axis of the first mounting base 41. A keyway 411 is provided on the inner wall of the sliding hole 413, and a limit key 231 protrudes from the outer peripheral wall of the mounting rod 23, and the limit key 231 is slidably engaged in the keyway 411.

[0035] Reference Figure 3 and Figure 4 The second mounting base 42 is fixedly connected to the side of the second connecting rod 52 near the template 2. The second mounting base 42 is located in the middle of the second connecting rod 52. After the first mounting base 41 and the second mounting base 42 are installed, the first mounting base 41 and the second mounting base 42 are coaxially arranged, and the mounting rod 23 rotatably passes through the second mounting base 42. When the second connecting rod 52 rotates, the first mounting base 41 can be forced to slide closer to the template 2 through the second mounting base 42.

[0036] Reference Figure 3 and Figure 4 A steel ball 421 is fixed to the end face of the second mounting base 42 away from the second connecting rod 52, and the steel ball 421 is eccentrically positioned with respect to the second mounting base 42. A first locking groove 412 is provided on the side of the first mounting base 41 near the second connecting rod 52 for locking the steel ball 421. The extension path of the first locking groove 412 is arc-shaped and coaxial with the first mounting base 41. The depth of the first locking groove 412 gradually decreases around the axis of the first mounting base 41. When the second mounting base 42 rotates, the gradually decreasing depth of the first locking groove 412 forces the first mounting base 41 to move closer to the template 2, thereby pressing against the edge of the template 2.

[0037] Reference Figure 3 and Figure 4The template 2 has a mounting groove 24 on its side near the composite plate 1. A first capsule 6 is disposed in the mounting groove 24. A powder package 61 and a liquid package 62 are disposed on the inner wall of the first capsule 6 at a position corresponding to the first mounting seat 41. The powder package 61 and the liquid package 62 are overlapped and fixedly connected to the inner wall of the first capsule 6. The powder package 61 is filled with sodium bicarbonate and inert gas, and the liquid package 62 is filled with dilute hydrochloric acid and inert gas. A second locking groove 13 is provided on the side of the composite plate 1 for locking the first capsule 6. A first extrusion block 414 for crushing the powder package 61 and the liquid package 62 is fixedly connected to the side of the first mounting seat 41 away from the second mounting seat 42. The template 2 has a relief groove 25 corresponding to the first extrusion block 414. The relief groove 25 is connected to the mounting groove 24. The first extrusion block 414 can pass through the relief groove 25 and extrude the powder package 61 and the liquid package 62.

[0038] Reference Figure 3 , Figure 4 and Figure 5 The second locking groove 13 is provided with a second extrusion block 14 corresponding to the first extrusion block 414. The second extrusion block 14 is fixedly connected to the groove wall of the second locking groove 13, and the side of the second extrusion block 14 near the first extrusion block 414 is an arc-shaped surface. A baffle 63 is fixedly connected to the inner wall of the first capsule 6 near the first extrusion block 414. Each powder packet 61 is provided with baffles 63 on both sides along the axial direction of the first capsule 6.

[0039] Reference Figure 3 and Figure 4 The template 2 is provided with an elastic element, a spring 22, that forces the first mounting base 41 to slide away from the template 2. The template 2 has a recess 21 corresponding to the first mounting base 41. The spring 22 is located in the recess 21 and is coaxially sleeved on the mounting rod 23. One end of the spring 22 is fixedly connected to the bottom wall of the recess 21, and the other end of the spring 22 is fixedly connected to the first mounting base 41. The diameter of the recess 21 is smaller than the diameter of the first mounting base 41, so that the first mounting base 41 can abut against the side of the template 2 after sliding.

[0040] The implementation principle of Example 2 is as follows: During installation, the nut 32 is pre-tightened. After being tightened to a certain extent, the first connecting rod 51, the second connecting rod 52 and the third connecting rod 53 are installed. Then, the nut 32 is tightened further. At this time, the first connecting rod 51 and the third connecting rod 53 can drive the second connecting rod 52 to rotate. When the second mounting seat 42 rotates, the steel ball 421 will move in the locking groove. Since the depth of the first locking groove 412 gradually decreases, it will force the first mounting seat 41 to move closer to the template 2, thereby driving the first mounting seat 41 to press against the edge of the template 2, thereby improving the tightness of the fit between the edge of the template 2 and the composite plate 1. Furthermore, when the first mounting base 41 slides, the first extrusion block 414 on the first mounting base 41 will crush the powder package 61 and the liquid package 62, causing sodium bicarbonate and dilute hydrochloric acid to mix, thereby generating a large amount of gas, causing the first capsule 6 to expand and be stuck in the second locking groove 13, thereby improving the sealing performance between the template 2 and the composite plate 1, and thus reducing the possibility of slurry leakage.

[0041] Example 3; The difference between Example 3 and Example 2 is that, referring to Figure 6 A first guide block 415 is fixedly connected to the side of the first mounting base 41 near the side of the second mounting base 42, and a second guide block 422 is fixedly connected to the side of the second mounting base 42 near the side of the first mounting base 41. A plurality of first guide blocks 415 and second guide blocks 422 are provided, with the first guide blocks 415 arranged in a circular array around the axis of the first mounting base 41, and the second guide blocks 422 arranged in a circular array around the axis of the second mounting base 42. Adjacent first guide blocks 415 have a gap for the second guide blocks 422 to engage.

[0042] Reference Figure 6 The first guide block 415 is provided with a first guide surface on one side distributed along the circumference of the first mounting base 41. The second guide block 422 has a second guide surface that is adapted to the first guide surface. When the second mounting base 42 rotates, the first mounting base 41 can be forced to move closer to the template 2 by the cooperation of the first guide surface and the second guide surface.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for preventing grout leakage in composite slab strips, comprising the following steps: Step 1: After the composite plate (1) is installed and the composite standard is checked, truss steel bars (11) are pre-embedded above the composite plate (1), and connecting steel bars (12) are installed on the truss steel bars (11) that are close to each other on the two adjacent composite plates (1); Step 2: The tie bolts (3) are inserted into the template (2), and then the template (2) is placed between the two composite plates (1), and then the tie bolts (3) are hung on the connecting steel bars (12) to complete the pre-installation of the template (2); Step 3: Then tighten the nuts (32) on the tie bolts (3) to make the template (2) move upward until the template (2) abuts against the composite plate (1), and the two ends of the template (2) abut against the lower surface of the two composite plates (1) respectively; The template (2) is provided with a pressing component (4) near the edge of the composite plate (1), and the nut (32) of the tie bolt (3) is provided with a driving component (5). When the nut (32) of the tie bolt (3) is tightened, the pressing component (4) can be driven by the driving component (5) to press the edge of the template (2). The drive assembly (5) includes a first link (51), a second link (52), and a third link (53). The first link (51) is mounted on the nut (32) of the tie bolt (3) near the composite plate (1). The third link (53) is mounted on the composite plate (1). The second link (52) is located between the first link (51) and the third link (53). One end of the first link (51) is hinged to the nut (32), and the other end of the first link (51) is hinged to the second link (52). The other end of the second link (52) is hinged to the third link (53), and the other end of the third link (53) is hinged to the composite plate (1). The pressing assembly (4) is mounted on the second link (52). When the second link (52) rotates, it can drive the pressing assembly (4) to press the edge of the template (2). The pressing component (4) includes a first mounting seat (41) and a second mounting seat (42). The template (2) is provided with a mounting rod (23). The first mounting seat (41) is slidably connected to the mounting rod (23) along the axial direction. The second mounting seat (42) is fixed on the second connecting rod (52). The first mounting seat (41) and the second mounting seat (42) are coaxially arranged. When the second mounting seat (42) rotates, it can force the first mounting seat (41) to slide.

2. The method for preventing grout flow in composite slab strips according to claim 1, characterized in that: In step 2, a plurality of connecting steel bars (12) are provided, and the axial direction of the plurality of connecting steel bars (12) is parallel to the width direction of the gap between the two composite plates (1). Each connecting steel bar (12) is provided with a plurality of tie bolts (3).

3. The method for preventing grout flow in composite slab strips according to claim 1, characterized in that: A steel ball (421) is fixed on the second mounting base (42). The first mounting base (41) is provided with a first locking groove (412) for the steel ball (421) to be locked. The first locking groove (412) is arc-shaped and is coaxial with the first mounting base (41). The depth of the first locking groove (412) gradually decreases around the axis of the first mounting base (41).

4. The method for preventing grout flow in composite slab strips according to claim 1, characterized in that: A first guide block (415) is fixedly connected to the side of the first mounting base (41) near the second mounting base (42), and a second guide block (422) is fixedly connected to the side of the second mounting base (42) near the first mounting base (41). There are several first guide blocks (415) and second guide blocks (422). Several first guide blocks (415) are arranged in a circular array around the axis of the first mounting base (41), and several second guide blocks (422) are arranged in a circular array around the axis of the second mounting base (42). Adjacent first guide blocks (415) have a gap for the second guide block (422) to engage. A first guide surface is provided on one side of the first guide block (415) distributed along the circumferential direction of the first mounting base (41), and the second guide block (422) has a second guide surface that matches the first guide surface. When the second mounting base (42) rotates, the first mounting base (41) can be forced to move towards the template (2) through the cooperation of the first guide surface and the second guide surface.

5. The method for preventing grout flow in composite slab strips according to claim 1, characterized in that: The template (2) is provided with an installation groove (24), and a first capsule (6) is provided in the installation groove (24). A powder package (61) and a liquid package (62) are provided in the first capsule (6) at a position corresponding to the first mounting seat (41). The liquid package (62) is filled with dilute hydrochloric acid liquid. The first mounting seat (41) is provided with a first extrusion block (414) for extruding the liquid package (62).

6. The method for preventing grout flow in composite slab strips according to claim 5, characterized in that: The template (2) is provided with an elastic element that forces the first mounting seat (41) to slide away from the template (2). The elastic element is a spring (22). The template (2) has a groove (21) corresponding to the first mounting seat (41). The spring (22) is located in the groove (21). The spring (22) is coaxially sleeved on the mounting rod (23). One end of the spring (22) is fixedly connected to the bottom wall of the groove (21), and the other end of the spring (22) is fixedly connected to the first mounting seat (41). The diameter of the groove (21) is smaller than the diameter of the first mounting seat (41), so that the first mounting seat (41) can abut against the side of the template (2) after sliding.

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