A deformed joint wall body heat preservation integrated construction method

Abstract

This invention relates to an integrated construction method for thermal insulation of expansion joint walls. Flexible and rigid sections are sequentially arranged on the surface of a standard rock wool board, allowing the composite insulation board to deform in different locations. The composite insulation board is placed at the expansion joint, and shear wall reinforcement is tied to both sides of the composite insulation board. Shear wall formwork is then erected, and three-section tie rods are used to secure the formwork and composite insulation board together, forming a tie to ensure the composite insulation board's position does not shift. After fixing, the shear walls on both sides can be poured simultaneously. After pouring, the composite insulation board remains in the expansion joint, providing insulation. Due to the presence of the flexible and rigid sections, even if the shear wall undergoes uneven deformation, the composite insulation board can adapt well to and withstand the corresponding deformation, thus ensuring the safety and stability of the building components. Additionally, reinforcing angle steel is placed at the bottom of the formwork to prevent root rot.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to an integrated construction method for thermal insulation of expansion joint walls. Background Technology

[0002] Building components expand and contract due to changes in factors such as temperature and humidity. To address this, vertical gaps are typically installed at appropriate locations in the building to separate the walls, floors, roof, and other components above the foundation, thus dividing the building into several independent parts and reducing the impact of expansion and deformation of the building components.

[0003] During the construction of expansion joints, formwork needs to be erected inside the expansion joints. However, due to the excessively narrow width of the expansion joints, the erection of the formwork becomes extremely difficult, and the dismantling of the formwork after the pouring is even more difficult, causing great inconvenience to the construction.

[0004] If one side of the shear wall is poured first, and then the other side is poured, the quality of the shear wall can be guaranteed. However, it requires erecting formwork twice, which affects the construction efficiency and is labor-intensive and time-consuming.

[0005] The conventional method for insulating expansion joints involves attaching insulation boards to the wider part of the expansion joint, cutting them neatly to ensure the straightness of the joint opening; and bonding soft polyethylene foam boards to galvanized steel sheets (iron sheets), shaping the product into an arc to allow for some expansion and contraction within the joint opening. The two sides are fixed between the wall and the insulation layer. When installing the expansion joint, the waterstop is installed first, and then the finished expansion joint is fixed. This construction method presents certain difficulties in manufacturing due to the many turning angles in the cross-section of the expansion joint cover plate. The connection method between the vertical cover plate and the horizontal cover plate is also one of the technical challenges in construction.

[0006] If insulation board material is used to fill the expansion joint, it can directly replace the formwork, which can not only solve the problem of formwork erection, but also solve the problem of insulation at the same time. However, since the general insulation board material is a flexible material, a layer of concrete panel needs to be laid on the surface of the insulation board to protect the properties of the insulation board material and prevent its structure from being damaged by the impact of concrete.

[0007] However, since the insulation boards are only fixed with internal supports, there is a possibility of insulation board misalignment, which leads to inconsistent thickness of the shear walls on both sides, affecting the stress properties of the shear walls and causing significant safety hazards. Furthermore, the concrete panel on the surface of the insulation board can only support the deformation of the entire shear wall. When encountering uneven deformation of the shear wall, the rigidity of the concrete panel prevents it from deforming properly, thus affecting the overall deformation of the building components and causing safety hazards.

[0008] Therefore, it is necessary to study an integrated construction method for thermal insulation of expansion joint walls. Summary of the Invention

[0009] Therefore, the purpose of this invention is to provide an integrated construction method for thermal insulation of expansion joint walls, which effectively solves the problems that may occur when using insulation materials instead of expansion joint formwork, such as misalignment due to the impact of concrete and inability to cope well with uneven shear force distribution, ultimately affecting the overall quality of building components.

[0010] To achieve the above objectives, the technical solution adopted by this invention is: a construction method for integrated insulation of expansion joint walls, characterized by comprising the following steps:

[0011] S1: Lay out the lines according to the drawings to determine the location of the expansion joint;

[0012] S2: The middle section of the three-section tie rod is threaded through the composite insulation board, which includes flexible sections and rigid sections arranged alternately in sequence;

[0013] S3: Use a tower crane to hoist the installed composite insulation board to the expansion joint and temporarily reinforce it;

[0014] S4: Tie shear wall reinforcement bars on both sides of the composite insulation board and arrange internal supports;

[0015] S5: Erect left-side and right-side formwork on both sides of the shear wall reinforcement;

[0016] S6: Pass the left and right screw sections through the tie holes on the left and right templates respectively and fix them to the middle screw section;

[0017] S7: Arrange the main back ribs and secondary back ribs on the outer side of the template, and reinforce them with mountain-shaped clips on the left and right sections of the screw rod;

[0018] S8: Segmented casting of shear walls, followed by vibration compaction;

[0019] S9: Remove the formwork and allow the concrete to cure after it has reached the required hardness.

[0020] Furthermore, the composite insulation board includes an elastic mesh, a rock wool board, and a concrete panel. The elastic mesh has multiple sets of evenly arranged mesh holes. The elastic mesh is bonded to the rock wool board, and the mesh holes and the rock wool board together form an open cavity. Concrete is poured into the cavity to form multiple sets of concrete panels.

[0021] Furthermore, the surfaces of the multiple sets of concrete panels are flush and together form abutment surfaces. Multiple sets of fixing holes are opened on the abutment surfaces, and the middle section screw passes through the fixing holes.

[0022] Furthermore, the upper surface of the composite insulation board is higher than the upper surfaces of the left and right templates, so that the composite insulation board forms a protruding section above the left and right templates and an insertion area below the left and right templates.

[0023] Furthermore, a baffle is provided at the upper end of the composite insulation board, and the baffle is adapted to the plug-in part.

[0024] Furthermore, the three-section tie rod includes a middle section tie rod, a fixing block, a left section tie rod, and a right section tie rod. The middle section tie rod passes through the fixing hole, and the left section tie rod and the right section tie rod pass through the tie holes of the left template and the right template, respectively, and are fixedly connected to the middle section tie rod by the fixing block.

[0025] Furthermore, the fixing block has two opposing threaded holes, one of which is adapted to the middle section screw, and the other threaded hole is adapted to the left and right screws.

[0026] Furthermore, positioning steel plates are fixedly welded onto the middle section screw, and the positioning steel plates are distributed on both sides of the composite insulation board to fix and limit the composite insulation board.

[0027] Furthermore, the lower ends of the left and right templates are fixed with reinforcing angle steel, one side of which is fixed to the template and the other side is fixed to the ground.

[0028] The beneficial effects of the above technical solution are:

[0029] This invention simplifies construction and improves efficiency by using composite insulation boards instead of ordinary expansion joint templates. Simultaneously, the composite insulation boards ensure insulation at the expansion joints, achieving two goals at once and offering good economic benefits. The composite insulation board is manufactured by bonding an elastic mesh to a rock wool board using structural adhesive. Then, concrete is used to fill the gaps in the elastic mesh, forming multiple concrete panels that collectively protect the rock wool board. Furthermore, the presence of the elastic mesh allows the entire composite insulation board to deform regionally, effectively adapting to the uneven deformation of shear walls.

[0030] This invention employs a three-section tie rod system, with holes drilled in the composite insulation board. The middle section of the tie rod is inserted into the hole, and fixing blocks are arranged on both sides of the middle section. The left and right sections of the tie rod can be threaded into the fixing blocks, achieving three-section fixed tie rods. After the middle section is inserted, positioning steel plates are welded onto it, and the composite insulation board is clamped between the two positioning steel plates, ensuring that the composite insulation board does not move horizontally. At the same time, the middle section also limits the vertical movement of the composite insulation board. When setting up the template, the left and right sections of the tie rod can be passed through the tie holes in the template and threadedly connected to the fixing blocks, reinforcing the three-section tie rod system and achieving overall structural stability. This ensures that the composite insulation board is in the correct position without displacement, guaranteeing construction quality. After pouring, the left and right tie rods can be disassembled and reused, reducing construction costs and achieving good economic benefits.

[0031] This invention allows for quick and easy positioning of the composite insulation board during the construction of the next layer by adjusting it upwards to form a protruding section. The interlocking positioning method is also more accurate and convenient, improving construction efficiency. The addition of a cap at the interlocking point protects the structural integrity of the protruding section and the internal rock wool board, ensuring its insulation effect and preventing damage to the composite insulation board structure during concrete pouring or adhesion to the protruding section surface, which could affect the progress of the next layer's construction. Furthermore, the placement of reinforcing angle steel at the base of the shear wall formwork ensures the stability and reliability of the shear wall base, reducing the occurrence of root rot and guaranteeing the quality of building construction. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the composite insulation board structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of the middle section screw of the present invention through which the composite insulation board is inserted;

[0034] Figure 3 This is a schematic diagram of the structure of the welded positioning steel plate and the tied shear wall reinforcement of the present invention;

[0035] Figure 4 This is a schematic diagram of the structure for supporting shear wall formwork, reinforcing it, and installing retaining caps according to the present invention.

[0036] Figure 5 This is a schematic diagram of the structure of the cast shear wall according to the present invention;

[0037] Figure 6 This is a schematic diagram of the structure for removing the shear wall formwork and retaining cap according to the present invention;

[0038] Figure 7 This is a schematic diagram of the three-dimensional structure of the composite insulation board of the present invention;

[0039] Figure 8 This is a three-dimensional structural diagram of another composite insulation board according to the present invention;

[0040] Figure 9 This is a structural schematic diagram of the multi-layer construction scenario of the present invention.

[0041] Attached diagram labels: 1 for rock wool board, 2 for elastic mesh, 3 for concrete panel, 4 for mid-section bolt, 5 for positioning steel plate, 6 for fixing block, 7 for shear wall reinforcement, 8 for formwork, 9 for square timber back rib, 10 for round steel back rib, 11 for U-shaped clip, 12 for fastening nut, 13 for stop cap, 14 for reinforcing angle steel, 15 for shear wall. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Example 1: This example describes an integrated construction method for thermal insulation of expansion joint walls, comprising the following steps:

[0044] like Figure 1-6 As shown in the diagram, the first step is to lay out the lines and determine the location of the expansion joints to be reserved and the position of the shear wall formwork 8, in order to prepare for subsequent construction.

[0045] The second step is to open fixing holes in the composite insulation board and insert the middle section screw 4 of the three-section tie rod into the fixing holes of the composite insulation board. Vertical positioning steel plates 5 located on both sides of the composite insulation board are welded to the middle section screw 4 to make the composite insulation board clamp between the two positioning steel plates 5, ensuring that the relative position of the composite insulation board and the middle section screw 4 is fixed. Fixing blocks 6 are threaded to both ends of the middle section screw 4.

[0046] The third step is to use a tower crane to hoist the insulation composite board with the middle section screw 4 fixed to the expansion joint position. After ensuring the position is correct, use a support frame to temporarily fix the composite insulation board and use the composite insulation board as the expansion joint template.

[0047] The fourth step is to tie the shear wall reinforcement 7 on both sides of the composite insulation board, and to arrange concrete internal supports at intervals on the tied shear wall reinforcement 7 to support the shear wall formwork 8 and the composite insulation board, ensuring the thickness of the protective layer of the shear wall and increasing the service life of the shear wall.

[0048] Fifth step: Set up templates 8 on both sides of the composite insulation board and adjust the position of the composite insulation board and templates 8 so that the tie holes of templates 8 can accurately correspond to the fixing blocks 6.

[0049] Step 6: Insert the left screw 401 and the right screw 402 into the tie holes of the left template 8 and the right template 8 respectively, and connect them with the fixing block 6 by threads. Make the central axes of the left screw 401, the right screw 402 and the middle screw 4 collinear. The three screws can jointly limit the composite insulation board in the vertical direction, while the positioning steel plate can limit the composite insulation board in the horizontal direction, ensuring that the position of the composite insulation board will not shift.

[0050] Step 7: Vertical square timber back ribs 9 and horizontal round steel back ribs 10 are arranged at intervals on the outer side of the template 8. The round steel back ribs 10 are positioned above and below the left and right screw rods 401 and 402, respectively. U-shaped clips 11 and fastening nuts 12 are arranged on the left and right screw rods 401 and 402 to reinforce the template 8 as a whole. Reinforcing angle steel 14 is fixed at the root of the template 8, so that one side of the reinforcing angle steel 14 is fixed to the template 8 and the other side is fixed to the ground. This reinforces the root of the template 8, prevents root rot, and ensures the quality of construction.

[0051] Step 8: Pour concrete in sections within the pouring zone formed between formwork 8 and the insulation composite board, and vibrate it to ensure that air bubbles are expelled from the concrete and that the concrete is more compact, thus ensuring the quality of shear wall 15.

[0052] Step 9: After the concrete hardness meets the standard, remove the left section screw 401, the right section screw 402 and the formwork 8 in sequence, repair the threaded holes on the fixing block 6 with mortar, and carry out water curing to ensure that the shear wall 15 can be fully hardened so that it can better bear the shear force.

[0053] like Figure 7As shown, a composite insulation board includes a rock wool board 1, an elastic mesh 2, and a concrete panel 3. The manufacturing method first requires using structural adhesive to splice the rock wool board 1 together, ensuring it matches the dimensions of the entire shear wall 15 and its thickness matches the dimensions of the expansion joints. It is important to note that during the construction of the first layer of expansion joints, the height of the rock wool board 1 should be 100mm higher than the shear wall to facilitate the formation of a protruding section. Next, the elastic mesh 2 is adhered to the spliced ​​rock wool board 1. The elastic mesh 2 is deformable and has multiple sets of evenly arranged mesh holes in all directions. The elastic mesh 2 and the rock wool board 1 together form multiple sets of evenly arranged open cavities. Matching concrete panels 3 are fixed within these cavities, and the surfaces of the multiple sets of concrete panels 3 together form abutment surfaces. Fixing holes are made in the concrete panels 3. The resulting composite insulation board can deform at the elastic mesh 2, giving it both rigidity and flexibility.

[0054] The concrete panel 3 can be directly made by cutting existing calcium silicate boards and then pressing and bonding them with a two-component polyurethane adhesive using a press, or by filling the cavity with mortar and allowing it to solidify and bond.

[0055] Multiple sets of concrete panels 3 together form a support surface that can protect the rock wool board 1 from damage caused by the impact of concrete pouring. At the same time, because the elastic mesh 2 can deform, each concrete panel 3 can individually cope with the deformation of the shear wall 15 and cope with uneven shear force.

[0056] Before pouring concrete, a cap 13 needs to be installed on the composite insulation board. The cap 13 can be adapted to the protruding section to protect the protruding section. When constructing expansion joints on other floors, the composite insulation board only needs to be adapted to the size of the shear wall 15. When fixing, the composite insulation board needs to be adjusted to protrude 100mm upward to form a protruding section, and an insertion area is formed below to accommodate the protruding section of the previous layer, forming a layer-by-layer structure. This not only makes it convenient and quick to position the composite insulation board of the next layer, but also forms an insertion section to better cope with shear force.

[0057] The three-section tie rod mentioned in the second step includes a left tie rod 401, a right tie rod 402, a fixing block 6, and a middle tie rod 4. The fixing block 6 has threaded holes on both sides, with the two threaded holes coaxial. The left tie rod 401, right tie rod 402, and middle tie rod 4 can all be threaded into the threaded holes, forming a three-section tie rod that together reinforces the formwork 8 and the composite insulation board. After the shear wall 15 is poured, the middle tie rod 4 and the fixing block 6 remain inside the shear wall, leaving threaded holes on the fixing block 6 on the wall surface of the shear wall 15. These threaded holes need to be filled with mortar. The left tie rod 401 and right tie rod 402 can be removed and reused, reducing construction costs and providing good economic benefits.

[0058] This embodiment can cope with uneven shear force changes by dividing the traditional monolithic concrete panel 3 into multiple small concrete panels 3, so that each small concrete panel 3 can cope with shear forces in different directions. At the same time, it protects the internal rock wool board 2 from damage. Furthermore, since the composite insulation board is left in the shear wall 15, insulation and construction are integrated, eliminating the need for insulation treatment of the expansion joint, saving construction time, improving construction efficiency, and having good social and economic benefits.

[0059] like Figure 9 As shown, when carrying out multi-layer construction, except for the first layer where the insulation composite board should be 100mm higher than the shear wall 15, the insulation composite boards of the other layers should be adapted to the dimensions of the shear wall 15. The insulation composite board arranged in the previous layer will form a protruding section above the ground. When constructing this layer, the composite insulation board can be directly overlapped on the protruding section of the previous layer. At this time, after the template 8 is erected, the tie holes on the template 8 can correspond exactly to the fixing block 6, which facilitates the connection of the left section screw 401 and the right section screw 402. At the same time, the composite insulation board of this layer will form a protruding section above the upper surface of the template 8, which facilitates the construction of the next layer. The overall construction is orderly, simple and convenient, and can greatly improve the construction efficiency, which has strong practicality.

[0060] This embodiment can effectively solve the problem of uneven deformation of shear walls. When a shear wall is partially deformed and partially undeformed due to shear force, small concrete panels can individually compress the rock wool board to deform, thereby protecting the safety of the building components. It can also ensure the integrity of the internal composite insulation board and prevent problems such as cracking due to uneven stress from affecting insulation.

[0061] Example 2 further illustrates the fabrication of the composite insulation board.

[0062] like Figure 8As shown, the elastic mesh 2 of the composite insulation board has rectangular holes with the same length as the shear wall. The concrete panels 3 are fixed in the rectangular holes. The elastic mesh 2 and the concrete panels 3 are distributed alternately from top to bottom, which can perform regional deformation and displacement in the horizontal direction.

[0063] This embodiment can better withstand horizontal shear forces and protect the structure of rock wool board 1 compared to the case where the rock wool is evenly distributed in all directions.

[0064] Similarly, the elastic grid 2 and the concrete panel 3 can be arranged sequentially from left to right, so that the composite insulation board can produce longitudinal deformation. The rigid and flexible sections of the composite insulation board can be distributed in different orders according to different application scenarios to adapt to different shear deformation conditions.

Claims

1. A construction method for integrated insulation of expansion joint walls, characterized in that: Includes the following steps: S1: Lay out the lines according to the drawings to determine the location of the expansion joints; S2: The middle section of the three-section tie rod (4) is threaded through the composite insulation board, which includes flexible sections and rigid sections arranged alternately in sequence; S3: Use a tower crane to hoist the installed composite insulation board to the expansion joint and temporarily reinforce it; S4: Tie shear wall reinforcement (7) on both sides of the composite insulation board and arrange internal supports; S5: Support the left formwork (8) and the right formwork (8) on both sides of the shear wall reinforcement (7); S6: Pass the left section screw (401) and the right section screw (402) through the tie holes on the left template (8) and the right template (8) respectively, and fix them to the middle section screw (4); S7: Arrange the main back rib (9) and secondary back rib (10) on the opposite outer side of the template (8), and reinforce them with mountain-shaped clips (11) on the left section screw (401) and the right section screw (402); S8: Segmented shear wall (15) is poured and vibrated; S9: Remove the formwork (8) and carry out curing after the concrete hardness reaches the standard; The composite insulation board includes an elastic mesh (2), a rock wool board (1) and a concrete panel (3). The elastic mesh (2) has multiple sets of uniformly arranged mesh holes. The elastic mesh (2) is bonded to the rock wool board (1). The mesh holes and the rock wool board (1) together form an open cavity. Concrete is poured into the cavity to form multiple sets of concrete panels (3). The surfaces of the multiple sets of concrete panels (3) are flush and together form abutting surface. Multiple sets of fixing holes are opened on the abutting surface, and the middle section screw (4) passes through the fixing holes.

2. The construction method for integrated insulation of expansion joint walls according to claim 1, characterized in that: The upper surface of the composite insulation board is higher than the upper surfaces of the left template (8) and the right template (8), so that the composite insulation board forms a protruding section above the left template (8) and a plug-in area below the right template (8).

3. The construction method for integrated insulation of expansion joint walls according to claim 2, characterized in that: The upper end of the composite insulation board is provided with a baffle (13), which is adapted to the protruding section.

4. The construction method for integrated insulation of expansion joint walls according to claim 1, characterized in that: The three-section tie rod includes a middle section tie rod (4), a fixing block (6), a left section tie rod (401), and a right section tie rod (402). The middle section tie rod (4) passes through the fixing hole. The left section tie rod (401) and the right section tie rod (402) pass through the tie holes of the left template (8) and the right template (8) respectively, and are fixedly connected to the middle section tie rod (4) by the fixing block (6).

5. The construction method for integrated insulation of expansion joint walls according to claim 4, characterized in that: The fixing block (6) has two opposing threaded holes, one of which is adapted to the middle section screw (4), and the other threaded hole is adapted to the left section screw (401) and the right section screw (402).

6. The construction method for integrated insulation of expansion joint walls according to claim 5, characterized in that: Positioning steel plates (5) are fixedly welded onto the middle section screw (4). The positioning steel plates (5) are distributed on both sides of the composite insulation board to fix and limit the composite insulation board.

7. A construction method for integrated insulation of expansion joint walls according to any one of claims 1-6, characterized in that: The lower ends of the left template (8) and the right template (8) are fixed with reinforcing angle steel (14). One side of the reinforcing angle steel (14) is fixed on the template (8), and the other side is fixed on the ground.

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