Wall formwork construction method

Abstract

The present application belongs to the civil engineering construction technical field, and particularly relates to a wall formwork construction method, after the binding of the shear wall structure steel bars, anchor lugs are welded on the shear wall steel bars; a filling mold layer is installed on the anchor lug side of the shear wall, the thickness of the filling mold layer is equal to the length of the exposed section of the anchor lug, so that the anchor lug is hidden inside the filling mold layer; the outer side wood formwork is installed with the outer surface of the filling mold layer as a reference surface, the inner side wood formwork is installed on the inner side of the shear wall, and then the two side wood formworks are pulled and fixed through the tension bolts; after the overall formwork of the shear wall is fixed, concrete is poured; after the concrete is solidified, the inner side wood formwork, the outer side wood formwork and the filling mold layer are removed. The present application avoids the increase of the anchor lug through hole of the wood formwork, saves the operation of the anchor lug hole during the installation of the wood formwork, effectively improves the construction speed, saves the labor cost, avoids the consumption of the wood formwork, improves the formwork turnover frequency, the filling mold layer can also avoid overflow and leakage, and therefore the construction quality is improved.

Description

Technical Field

[0001] This invention relates to the field of civil engineering construction technology, specifically to a method for constructing wall formwork. Background Technology

[0002] Building exterior walls need to be covered with thermal insulation materials. Nowadays, in metallurgical engineering, new spray-type thermal insulation materials are being used more and more widely. The use of spray-type thermal insulation materials requires the application of mesh on the wall surface for material stability. In order to attach the mesh, exposed anchor claws are required on the surface of the shear wall structure.

[0003] For walls with exposed anchor claws on the surface, the formwork construction is more difficult. The formwork needs to have pre-drilled holes corresponding to the facets of the anchor claws, which greatly reduces the turnover of the formwork. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a formwork construction method for walls equipped with anchor claws.

[0005] The technical solution adopted by the present invention to solve the aforementioned problem is as follows: A wall formwork construction method includes the following steps: The first step is to tie the reinforcing steel bars of the shear wall structure; The second step is to weld anchor claws onto the shear wall reinforcement according to the distribution of anchor claws, lay out the lines on the outside of the exposed anchor claws, and verify that the outer ends of all anchor claws are on the same plane. The third step is to install a filling formwork layer on the anchor claw side of the shear wall. The thickness of the filling formwork layer is equal to the length of the exposed section of the anchor claw, thereby hiding the anchor claw inside the filling formwork layer. The fourth step is to install the outer wooden formwork with the outer surface of the infill layer as the reference surface, install the inner wooden formwork on the inside of the shear wall, and then tie and fix the wooden formwork on both sides with tie bolts. Fifth, after the overall formwork of the shear wall is fixed, concrete is poured. Step 6: After the concrete has hardened, remove the inner wooden formwork, the outer wooden formwork, and the filling layer.

[0006] Compared with the prior art, the present invention employing the above structure has the following advantages: The wall formwork construction method provided by this invention uses a filling mold layer to wrap the exposed anchor claws, moving the constraint surface of the wooden formwork inward. This avoids the need for additional through holes for the anchor claws in the wooden formwork. On the one hand, it saves the operation of aligning the anchor claws with the holes during the installation of the wooden formwork, effectively improving the construction speed and saving labor costs. On the other hand, it avoids the wear and tear of the wooden formwork, increases the turnover rate of the formwork, and the filling mold layer effectively wraps the anchor claws, preventing grout overflow and leakage, thus also improving the construction quality.

[0007] As a preferred option, a further technical solution to the above structure is: Preferably, the filling layer is made of EPS board; EPS board is inexpensive, easy to install on multi-anchor surfaces, improving construction speed and saving construction costs.

[0008] EPS board is composed of multiple EPS strips, which are arranged layer by layer between the upper and lower rows of anchor claws. The upper EPS strips are abutted against the lower EPS strips. The segmented installation reduces damage to the EPS strips and enables reuse.

[0009] The outer end of the anchor claw is embedded in the lower edge surface of the upper EPS strip board; the wooden template is used to apply inward lateral pressure to the EPS board, and the anchor claw is used to limit the wooden template to ensure the thickness of the wall concrete.

[0010] The outer end of the anchor claw is hidden inside the lower edge surface of the EPS strip; it is used to transmit pressure to the wooden formwork as a whole in the EPS layer, and the flexible surface of the EPS prevents the wooden formwork from being worn.

[0011] The filling formwork layer includes an inner panel, which is composed of multiple unit panels. The upper side of the unit panel abuts against the lower side of the upper row of anchor claws, and the lower side of the unit panel abuts against the upper side of the lower row of anchor claws. The unit panel consists of a support plate and sealing strips fixed to the upper and lower sides of the support plate. The height of the sealing strip is greater than or equal to half the diameter of the anchor claw reinforcement. The sealing strip on the lower side of the upper unit panel abuts against the sealing strip on the upper side of the lower unit panel. In this scheme, the support plate serves as the concrete forming surface to ensure the wall forming effect. The upper and lower sealing strips deform upon encountering the anchor claws and fully wrap around the reinforcement to prevent grout leakage. The support plate is a reusable structure, and only a small number of sealing strips are consumables, greatly reducing material consumption during construction.

[0012] Support rods are also installed on the outer side of the inner panel. One end of the support rod is fixed to the outer wooden template, and the other end abuts against the surface of the inner panel. The support rods transmit the pressure of the wooden template to the inner panel, effectively positioning the inner panel.

[0013] Evenly spaced tie springs are also provided on the inner panel surface. One end of each tie spring is connected to the end of the anchor claw, and the other end is fixed to the inner panel surface. The tie springs, in conjunction with the support rods, exert bidirectional force on the inner panel, ensuring its stable fixation before concrete pouring. Attached Figure Description

[0014] Figure 1 A schematic diagram of a shear wall structure with anchor claws on the surface according to the present invention; Figure 2 This is a schematic diagram of the wooden formwork structure customized for this type of shear wall according to the present invention; Figure 3 This is an implementation structural diagram of the present invention using EPS board as the filling mold layer; Figure 4 This is a structural diagram of the unit panel of Embodiment 2 of the filling mold layer of the present invention; Figure 5 This is a schematic diagram of the structure of the upper and lower unit panels of the present invention cooperating at the anchor claw position. Figure 6 This is an installation state diagram of Embodiment 2 of the filling mold layer of the present invention.

[0015] Explanation of reference numerals in the attached diagram: 1. Shear wall; 2. Anchor claw; 3. Outer wooden formwork; 4. Anchor claw hole; 5. Tie bolt hole; 6. EPS board; 61. Upper EPS strip; 62. Lower EPS strip; 7. Support plate; 71. Upper unit panel; 72. Lower unit panel; 8. Sealing strip; 9. Tie spring; 10. Support rod. Detailed Implementation

[0016] The present invention will be further described below with reference to embodiments, which are intended only to provide a better understanding of the invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0017] In the existing technology, the shear wall 1 is designed with a surface coated with thermal insulation material, and the surface is arranged with anchor claws 2. The structure of the shear wall 1 is as follows: Figure 1 As shown, the anchor claws 2 are arranged in a quincunx pattern. The shaped wooden template is as follows... Figure 2 The need to drill tie bolt holes 5 and anchor claw holes 4 on the surface, with a large number of holes, greatly reduces the strength of the wooden formwork, making it impossible to reuse the formwork in different wall constructions, and even greatly reducing its reuse capacity in the same project.

[0018] The present invention provides a wall formwork construction method for the above-mentioned type of shear wall, specifically including the following steps: The first step is to tie the reinforcing bars of shear wall 1.

[0019] The second step is to weld anchor claws 2 onto the reinforcing bars of shear wall 1 according to the distribution design of anchor claws 2, lay out the lines on the outside of the exposed anchor claws 2, and verify that the outer ends of all anchor claws 2 are on the same plane; at the same time, the positions of the shear wall surface can also be laid out and marked on the anchor claws for subsequent formwork positioning.

[0020] The third step is to install a filling formwork layer on the side of the anchor claw 2 of the shear wall 1, thereby hiding the anchor claw 2 inside the filling formwork layer; The fourth step is to install the outer wooden formwork 3 with the outer surface of the filling formwork as the reference surface, install the inner wooden formwork on the inner side of the shear wall 1, and then tie and fix the wooden formwork on both sides with tie bolts. Fifth step: After the overall formwork of shear wall 1 is fixed, concrete is poured. Step 6: After the concrete has solidified, remove the inner wooden formwork, the outer wooden formwork 3, and the filling formwork layer.

[0021] The design concept of this invention is to use a flexible support structure to wrap and isolate the anchor claw 2, causing the support surface of the outer wooden formwork 3 to shift inward, thereby reducing the number of openings in the wooden formwork and improving the turnover rate of the wooden formwork. This invention provides a filling formwork layer that can both isolate the anchor claw 2 and transfer the force of the outer wooden formwork 3 to a predetermined position on the surface of the shear wall 1.

[0022] The filling formwork layer of the present invention should have the following characteristics: the inner surface of the filling formwork layer in contact with the shear wall concrete is made of a non-deformable or slightly deformable material, thereby enabling the shear wall 1 formed by the poured concrete to be shaped and constrained; there is a supporting force between the outer surface and the inner surface of the filling formwork layer.

[0023] As an alternative, the filling layer is EPS board 6; EPS board 6 is inexpensive, easy to install on the surface of the multi-anchor claw 2, improving construction speed and saving construction costs.

[0024] See Figure 3 Specifically, the EPS board 6 is composed of multiple EPS strips, which are layered between each row of anchor claws 2. The upper EPS strip 61 and the lower EPS strip 62 are abutted against each other. The outer end of the anchor claw 2 can be embedded in the lower edge surface of the upper EPS strip 61, i.e., exposed on the surface of the lower EPS strip 62. When installing the template, the outer wooden template 3 abuts against the outer end of the anchor claw 2, using the wooden template to apply inward lateral pressure to the EPS board 6. The anchor claw 2 is used to limit the wooden template, preventing the outer wooden template from exceeding the pressure limit on the filling template layer and ensuring the thickness of the wall concrete. Optionally, the outer end of the anchor claw 2 can be set to be hidden inside the lower edge surface of the upper EPS strip 61. The pressure of the wooden template is transmitted through the entire EPS layer, and the flexible surface of the EPS prevents wear on the wooden template. In this solution, the EPS board 6 is installed in sections, reducing damage to the EPS strips and enabling reuse.

[0025] EPS board 6 is inexpensive and adapts to the position and shape of the anchor claw 2 after installation, providing a complete wrapping effect. The supporting force of EPS board 6 transfers the pressure of the outer wooden formwork 3 to its inner surface, which is used for concrete forming on the inner surface of EPS board 6. EPS board 6 has low construction cost, does not adhere to concrete, and is easy to remove.

[0026] As an alternative, see Figures 4 to 6The filling formwork layer includes an inner panel, which is composed of multiple unit panels. The upper side of the unit panel abuts against the lower side of the upper row of anchor claws 2, and the lower side of the unit panel abuts against the upper side of the lower row of anchor claws 2. The unit panel consists of a support plate 7 and sealing strips 8 fixed to the upper and lower sides of the support plate 7. The height of the sealing strip 8 is greater than or equal to half the diameter of the reinforcing bar of the anchor claw 2. The sealing strip 8 on the lower side of the upper unit panel 71 abuts against the sealing strip 8 on the upper side of the lower unit panel 72. In this scheme, the support plate 7 serves as a support structure to ensure the wall surface forming effect. The upper and lower sealing strips 8 deform upon encountering the anchor claws 2 and fully wrap around the reinforcing bars to prevent grout leakage. The support plate 7 is a reusable structure, and only a small number of sealing strips 8 are used as consumables, which greatly reduces the material consumption during construction.

[0027] A support rod 10 is also provided on the outer side of the inner panel. One end of the support rod 10 is fixed to the outer wooden template 3, and the other end abuts against the surface of the inner panel. The support rod 10 transmits the pressure of the wooden template to the inner panel, effectively positioning the inner panel.

[0028] Evenly spaced tie springs 9 are also provided on the inner panel surface. One end of the tie spring 9 is connected to the end of the anchor claw 2, and the other end is fixed to the inner panel surface. The tie spring 9 and the support rod 10 work together to exert bidirectional force on the inner panel, so that the inner panel can be stably fixed before concrete is poured.

[0029] Sealing strip 8 is made of EPS material.

[0030] Compared with the prior art, the present invention employing the above structure has the following advantages: The wall formwork construction method provided by this invention uses a filling mold layer to wrap the exposed anchor claws, moving the constraint surface of the wooden formwork inward, thereby avoiding the need for additional anchor claw holes in the wooden formwork. On the one hand, this saves on the operation of anchor claws to holes during the installation of the wooden formwork, effectively improving construction speed and saving labor costs. On the other hand, it avoids the wear and tear of the wooden formwork, increases the turnover rate of the formwork, and the filling mold layer effectively wraps the anchor claws, preventing grout overflow and leakage, thus also improving construction quality.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes made based on the description and drawings of the present invention are included within the scope of the present invention.

Claims

1. A method for constructing wall formwork, comprising the following steps: The first step is to tie the reinforcing bars of the shear wall (1) structure; The second step is to weld anchors (2) onto the reinforcing bars of the shear wall (1) according to the distribution design of the anchors (2), lay out the lines on the outside of the exposed anchors (2), and verify that the outer ends of all anchors (2) are on the same plane. Its features are: The third step is to install a filling formwork layer on the side of the anchor claw (2) of the shear wall (1) so that the anchor claw (2) is hidden inside the filling formwork layer. The filling formwork layer includes an inner panel, which is composed of multiple unit panels. The upper side of the unit panel abuts against the lower side of the upper row of anchor claws (2), and the lower side of the unit panel abuts against the upper side of the lower row of anchor claws (2). The unit panel consists of a support plate (7) and sealing strips (8) fixed to the upper and lower sides of the support plate (7). The height of the sealing strip (8) is greater than or equal to half the diameter of the anchor claw (2) steel bar. The sealing strip (8) on the lower side of the upper unit panel (71) abuts against the sealing strip (8) on the upper side of the lower unit panel (72). A support rod (10) is also provided on the outer side of the inner panel. One end of the support rod (10) is fixed to the outer wooden template (3), and the other end abuts against the surface of the inner panel. The sealing strip (8) is made of EPS material. The fourth step is to install the outer wooden formwork (3) with the outer surface of the filling formwork as the reference surface, install the inner wooden formwork on the inner side of the shear wall (1), and then tie the two wooden formworks together with tie bolts. Fifth step: After the overall formwork of the shear wall (1) is fixed, concrete is poured. Step 6: After the concrete has solidified, remove the inner wooden formwork, the outer wooden formwork (3), and the filling formwork.

2. The wall formwork construction method according to claim 1, characterized in that: The inner panel surface is also uniformly provided with tie springs (9), one end of the tie spring (9) is connected to the end of the anchor claw (2), and the other end is fixed to the inner panel surface.

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