Fabricated prefabricated thermal insulation wall and construction process thereof

Abstract

The invention relates to the technical field of prefabricated wallboard construction, in particular to an assembly type prefabricated heat preservation wall and a construction technology thereof.The assembly type prefabricated heat preservation wall is installed on a floor slab, vertical connecting steel bars are reserved on the floor slab, and the assembly type prefabricated heat preservation wall comprises a first prefabricated slab and a second prefabricated slab; the first prefabricated slab and the second prefabricated slab are connected through a steel bar frame, a cast-in-place area is formed between the first prefabricated slab and the second prefabricated slab, and the cast-in-place area is used for being arranged on a vertical connecting steel bar in a sleeving mode. According to the fabricated prefabricated thermal insulation wall, the cast-in-place area is connected with the vertical connecting steel bars reserved on the floor in a sleeving mode, then concrete is poured, a prefabricated-cast-in-place composite structure is formed through the steel bar frame and the prefabricated slabs, rigid connection of nodes is achieved, and the shear resistance and the overturning resistance of the wall and the floor are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of precast wallboard construction, and particularly to an assembled precast thermal insulation wall and its construction technology. Background Art

[0002] Precast houses, also known as prefabricated buildings, are prefabricated component products for assembling and constructing houses in an industrialized way of producing products on an assembly line. According to their main building structural forms, they can be divided into: panel prefabrication type, such as large panel buildings; box prefabrication type, such as reinforced concrete box buildings, wooden box buildings, etc.; frame prefabrication type, such as reinforced concrete skeleton prefabricated buildings, light steel prefabricated buildings, and light wood structure buildings, etc.

[0003] Existing precast wallboards generally only reserve steel bars on the side walls, and then pour cast-in-place sections between adjacent precast wallboards. However, the strength between such precast wallboards and the floor slab needs to be improved. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: In order to solve the technical problems in the prior art, the present invention provides an assembled precast thermal insulation wall and its construction technology.

[0005] The technical solution adopted by the present invention to solve its technical problems is: An assembled precast thermal insulation wall is installed on a floor slab. Vertical connecting steel bars are reserved on the floor slab. The assembled precast thermal insulation wall includes a first precast slab and a second precast slab. The first precast slab and the second precast slab are connected by a steel bar framework. An in-situ casting area is formed between the first precast slab and the second precast slab. The in-situ casting area is used to sleeve on the vertical connecting steel bars.

[0006] For the assembled precast thermal insulation wall of the present invention, the in-situ casting area sleeves the vertical connecting steel bars reserved on the floor slab, and then concrete is poured. A precast-in-situ composite structure is formed through the steel bar framework and the precast slabs, realizing rigid connection of the joints and significantly improving the shear resistance and anti-overturning ability of the wall and the floor slab.

[0007] Further, the steel bar framework includes a first steel bar mesh, a second steel bar mesh, and a support steel bar mesh. The first steel bar mesh is embedded in the first precast slab, the second steel bar mesh is embedded in the second precast slab, and one end of the support steel bar mesh is connected to the first steel bar mesh and the other end is connected to the second steel bar mesh.

[0008] Further, the supporting steel bar mesh comprises a plurality of groups of supporting mesh sheets, the plurality of groups of supporting mesh sheets are arranged along the width direction of the first precast slab, each group of supporting mesh sheets comprises a horizontal supporting steel bar and an inclined supporting steel bar, one end of the horizontal supporting steel bar is connected to the first steel bar mesh, the other end is connected to the second steel bar mesh, the inclined supporting steel bar is arranged between two adjacent horizontal supporting steel bars, and a triangular stable structure is formed among the inclined supporting steel bar, the adjacent horizontal supporting steel bars, the first precast slab or the second precast slab.

[0009] Further, the steel bar framework further comprises a prestressed mesh sheet, the prestressed mesh sheet comprises supporting connecting steel bars, sliding rods, sliding sleeves and prestressed steel bars, the supporting connecting steel bars are horizontally arranged and connected to the first steel bar mesh or the second steel bar mesh, the supporting connecting steel bars are connected to the sliding rods, two sliding rods are arranged along the thickness direction of the first precast slab or the second precast slab, each sliding rod is arranged along the width direction, the sliding sleeves slide on the sliding rods, the prestressed steel bars are in a wavy shape, and the turning points of the prestressed steel bars are connected to the sliding sleeves.

[0010] Further, pre-tensioning anchors are arranged at both ends of the prestressed steel bars, each pre-tensioning anchor comprises a sleeve and two conical pieces, the two conical pieces are arranged in the sleeve, and the prestressed steel bars pass through between the two conical pieces.

[0011] Further, a plurality of groups of prestressed mesh sheets are arranged along the vertical direction, and the prestressed steel bars in adjacent prestressed mesh sheets are arranged staggeredly.

[0012] Further, an avoidance notch is arranged on the side wall of the sliding sleeve to avoid the supporting connecting steel bars.

[0013] A construction process comprises the following steps: S1. Hoist the above-mentioned assembled precast heat-insulating wall above the floor slab; S2. Lower the assembled precast heat-insulating wall onto the floor slab and sleuth the cast-in-place area onto the vertical connecting steel bars; S3. Seal both sides of the cast-in-place area with formwork and pour concrete into the cast-in-place area; S4. After the concrete in the cast-in-place area is formed, remove the formwork.

[0014] Further, in step S3, before pouring the concrete, pre-tension the prestressed steel bars to deform the prestressed steel bars and make the prestressed steel bars contact the vertical connecting steel bars, and stop pre-tensioning when the pre-tensioning reaches the designed pressure.

[0015] Further, in step S4, before removing the formwork, release the pre-tensioning of the prestressed steel bars.

[0016] The beneficial effects of the present invention are

[0017] 1. The vertical connecting steel bars reserved on the cast-in-place area are sleeved on the floor slab, and then concrete is poured. A precast-cast-in-place composite structure is formed through the steel bar framework, realizing rigid connection of the joints and significantly improving the shear resistance and anti-overturning ability of the wall and the floor slab.

[0018] 2. By applying a tensile force to the formed concrete in the cast-in-place area through prestressed steel bars, the anti-cracking performance and stiffness can be improved, thereby enhancing the overall strength of the precast wall. At the same time, the prestressed steel bars are in a wavy shape, which can achieve the wave crest and wave trough locking effect, and can apply three-dimensional forces when releasing stress, further improving the anti-cracking effect. In addition, the wavy prestressed steel bars can also increase the contact area with the concrete, improve the bond strength, and eliminate the stress concentration at the ends of the prestressed steel bars. If micro-cracks appear in the wall, the prestress generated by the prestressed steel bars can also achieve self-closure.

[0019] 3. Through the innovative design of the triangular space truss and the prestress adjustable structure, while ensuring the rapid construction of the prefabricated wall, the bottleneck of weak shear resistance and easy cracking of the traditional precast structure is broken through, and it can meet the construction requirements such as high-intensity seismic areas and large temperature difference environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the drawings and embodiments.

[0021] Figure 1 It is a schematic structural diagram showing the overall prefabricated insulated wall in the present invention.

[0022] Figure 2 It is a schematic side view showing the supporting steel bar mesh in the present invention.

[0023] Figure 3 It is a schematic top view showing the prestressed mesh in the present invention.

[0024] Figure 4 It is a schematic diagram showing the pre-tensioning anchor in the present invention.

[0025] Figure 5 It is a schematic diagram showing the first mold shell in the present invention.

[0026] Figure 6 is Figure 5 a partial enlarged view of part A in

[0027] Figure 7 It is a schematic sectional view showing the chute and the slider in the present invention.

[0028] In the figure: 1, the first precast slab; 2, the second precast slab; 3, the frame steel bars; 31, the support steel bar mesh; 311, the horizontal support steel bars; 312, the inclined support steel bars; 32, the prestressed mesh; 321, the support connection steel bars; 322, the sliding rods; 323, the sliding sleeves; 324, the prestressed steel bars; 33, the pre-tensioning anchor; 331, the sleeve; 332, the conical piece; 4, the first mold housing; 41, the support blocks; 42, the lifting rings; 5, the support locking assembly; 51, the support rods; 511, the waist-shaped grooves; 512, the support grooves; 513, the arc surfaces; 52, the rotating rods; 53, the ear plates; 54, the locking plates; 541, the card slots; 542, the sliding grooves; 543, the sliders; 544, the compression springs; 545, the tension rods. Detailed implementation manners

[0029] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more. In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] The present invention discloses an assembled precast thermal insulation wall and its construction technology.

[0032] In the first aspect, the present invention discloses an assembled precast thermal insulation wall.

[0033] Refer to Figures 1 to 4, The prefabricated insulated wall is installed on the floor slab. Vertical connecting steel bars are reserved on the floor slab. The prefabricated insulated wall includes a first precast slab 1 and a second precast slab 2. The first precast slab 1 and the second precast slab 2 are connected by a steel bar framework. A cast-in-place area is formed between the first precast slab 1 and the second precast slab 2, and the cast-in-place area is used to sleeve on the vertical connecting steel bars. The cast-in-place area sleeves the vertical connecting steel bars reserved on the floor slab, and then concrete is poured. A precast-cast-in-place composite structure is formed through the steel bar framework and the precast slabs, realizing rigid connection of the joints and significantly improving the shear and anti-overturning capacities of the wall and the floor slab.

[0034] Specifically, the steel bar framework includes a first steel bar mesh, a second steel bar mesh, and a support steel bar mesh 31. The first steel bar mesh is embedded in the first precast slab 1, the second steel bar mesh is embedded in the second precast slab 2, and one end of the support steel bar mesh 31 is connected to the first steel bar mesh and the other end is connected to the second steel bar mesh.

[0035] More specifically, the support steel bar mesh 31 includes several groups of support mesh sheets. The several groups of support mesh sheets are arranged along the width direction of the first precast slab 1. Each group of support mesh sheets includes several horizontal support steel bars 311 and inclined support steel bars 312. One end of the horizontal support steel bar 311 is fixedly connected to the first steel bar mesh, and the other end is fixedly connected to the second steel bar mesh. The inclined support steel bar 312 is arranged between two adjacent horizontal support steel bars 311. A rectangle is formed between two adjacent horizontal support steel bars 311, the first precast slab 1, and the second precast slab 2. A triangular stable structure is formed between the inclined support steel bar 312, the adjacent horizontal support steel bar 311, the first precast slab 1 or the second precast slab 2 to improve the stability of the support. At the same time, the stress transfer is optimized through the triangular grid, reducing the amount of steel bars used and maintaining the equivalent flexural stiffness.

[0036] Furthermore, the steel bar framework further includes several groups of prestressed mesh sheets 32. The several groups of prestressed mesh sheets 32 are arranged in an array along the vertical direction. Each group of prestressed mesh sheets 32 includes two rows of support connecting steel bars 321, two sliding rods 322, several sliding sleeves 323, and a prestressed steel bar 324. The support connecting steel bars are arranged horizontally. One row of support connecting steel bars 321 is fixedly connected to the first steel bar mesh, and the other row of support connecting steel bars 321 is fixedly connected to the second steel bar mesh. One row of support connecting steel bars 321 is fixedly connected to the same sliding rod 322, and each sliding rod 322 is arranged along the width direction. The several sliding sleeves 323 are divided into two groups and slide on the two sliding rods 322 respectively. An avoidance notch is provided on the side wall of the sliding sleeve 323 to avoid the support connecting steel bars 321. The prestressed steel bar 324 is in a wavy shape, and each turning point of the prestressed steel bar 324 is fixedly connected to a sliding sleeve 323.

[0037] In addition, pre-tensioning anchors 33 are provided at both ends of the prestressed steel bars 324. The pre-tensioning anchors 33 include a sleeve 331 and two tapered plates 332. The two tapered plates 332 are arranged inside the sleeve 331. The prestressed steel bars 324 pass through between the two tapered plates 332. The large ends of the tapered plates 332 are arranged in a direction away from the sliding sleeve 323. So that after the prestressed steel bars 324 are tensioned, the pre-tensioning anchors 33 prevent the prestressed steel bars 324 from contracting. When it is necessary to release the stress of the prestressed steel bars 324, the pre-tensioning anchors 33 can be removed. During construction, the pre-tensioning anchors 33 can be installed on the formwork.

[0038] The prestressed steel bars 324 in two adjacent groups of prestressed wire meshes 32 are arranged staggeredly. Preferably, the two prestressed steel bars 324 are staggered by half a wave along the width direction of the first precast slab 1, that is, the two prestressed steel bars 324 are symmetrically arranged with respect to the vertical plane.

[0039] Working principle: Through the innovative design of the triangular space truss and the prestress adjustable structure, while ensuring the rapid construction of the assembled wall, it breaks through the bottleneck of the traditional precast structure with weak shear resistance and easy cracking, and can adapt to the construction requirements of high-intensity seismic areas, large temperature difference environments, etc.

[0040] In a second aspect, the present invention discloses a construction process.

[0041] A construction process includes the following steps:

[0042] S1. Hoist the above-mentioned assembled precast thermal insulation wall above the floor slab;

[0043] S2. Lower the assembled precast thermal insulation wall onto the floor slab and sleeved the cast-in-place area on the vertical connecting steel bars;

[0044] S3. Seal both sides of the cast-in-place area with formwork and pour concrete into the cast-in-place area. Before pouring the concrete, install the pre-tensioning anchors 33 on the outside of the formwork, pass the ends of the prestressed steel bars 324 out of the formwork and through the pre-tensioning anchors 33, and then pre-tension the prestressed steel bars 324 through a jack to deform the prestressed steel bars 324 and make the prestressed steel bars 324 contact the vertical connecting steel bars. When the tensioning reaches the design pressure, stop the tensioning. The double-stage tensioning method can be used during tensioning. Eliminate geometric deviations during the initial tensioning, and lock the waveform during the final tensioning. When releasing the stress, it can also be released step by step to avoid damaging the concrete structure.

[0045] Applying a tension force to the formed concrete in the cast-in-place area through the prestressed steel bars 324 can improve the crack resistance and stiffness, thereby enhancing the overall strength of the precast wall. At the same time, the prestressed steel bars 324 are in a wavy shape, which can achieve the wave peak and wave valley locking effect, and can apply three-dimensional forces when releasing stress, further improving the crack resistance effect. The wavy prestressed steel bars 324 can also increase the contact area with the concrete, improve the bond strength, and eliminate the stress concentration at the ends of the prestressed steel bars 324. If micro-cracks appear in the wall, the prestress generated by the prestressed steel bars 324 can also achieve self-closure. In addition, the prestressed steel bars 324 themselves are the support framework for the concrete in the cast-in-place area, and after the tensioned prestressed steel bars 324 come into contact with the vertical connecting steel bars, it can further improve the connection strength between the concrete part of the cast-in-place area after pouring and the floor slab.

[0046] S4. After the concrete in the cast-in-place area is formed, remove the formwork. Before removing the formwork, release the pre-tension on the prestressed steel bars 324. In addition, a cast-in-place section is also provided between adjacent precast walls, and the part of the prestressed steel bars 324 located outside the cast-in-place area can be connected to the steel mesh of the cast-in-place section to improve the connection strength between the precast wall and the cast-in-place section.

[0047] In the third aspect, the present invention discloses a pouring mold.

[0048] A pouring mold for pouring the above-mentioned first precast slab 1, referring to Figures 5 to 7 , includes a first mold housing 4. An accommodation cavity is provided inside the first mold housing 4 for accommodating the first precast slab 1. A support and locking assembly 5 is provided on the side wall of the first mold housing 4. The support and locking assembly 5 has a support state and a locking state. In the support state, the support and locking assembly 5 is used to support the second steel mesh; in the locking state, the support and locking assembly is used to lock the first precast slab 1 on the first mold housing 4. A plurality of support assemblies are provided and arranged on the first mold housing 4.

[0049] Specifically, the support and locking assembly 5 includes a support rod 51, a rotating rod 52, an ear plate 53, and a locking plate 54. There are two ear plates 53, and both ear plates 53 are fixedly connected to the top surface of the first mold housing 4, and the rotating rod 52 is fixedly connected between the two ear plates 53. A waist-shaped groove 511 is opened along the length direction of the support rod 51, and the waist-shaped groove 511 is sleeved on the rotating rod 52. One end of the support rod 51 close to the waist-shaped groove 511 is provided with an arc surface 513, and the thickness of the arc surface 513 is not greater than the minimum distance between the rotating rod 52 and the first mold housing 4, so that the support rod 51 can rotate relative to the first mold housing 4. A support groove 512 is opened at the top of the support rod 51 to catch the steel bars in the second steel mesh.

[0050] The locking plate 54 is fixedly connected to the side wall of the first mold housing 4. A card slot 541 for the support rod 51 to be inserted is provided on the locking plate 54. A sliding groove 542 is provided on the inner wall of the card slot 541. A slider 543 slides in the sliding groove 542. A compression spring 544 is also provided in the sliding groove 542. The compression spring 544 is arranged between the slider 543 and the bottom of the sliding groove 542. The slider 543 is used to be inserted into the waist-shaped groove 511 to prevent the support rod 51 from moving. A pull rod 545 is also fixedly connected to the slider 543. One end of the pull rod 545 away from the slider 543 extends out of the locking plate 54. Generally, the slider 543 is pulled out of the waist-shaped groove 511 through the pull rod 545.

[0051] When the support rod 51 is in the supporting state, the support rod 51 rotates relative to the first mold housing 4 to a state approximately perpendicular to the first mold housing 4. At this time, the groove wall or bottom wall of the support groove 512 contacts one of the steel bars of the second steel mesh, thereby providing support for the second steel mesh.

[0052] When the support rod 51 is in the locked state, the support rod 51 rotates to a state approximately parallel to the top surface of the first mold housing 4. At this time, the bottom of the support rod 51 abuts against the top surface of the first precast slab 1. Then, the support rod 51 is moved horizontally so that the support rod 51 is inserted into the card slot 541. As the support rod 51 moves, the waist-shaped groove 511 is aligned with the sliding groove 542. At this time, the slider 543 is inserted into the waist-shaped groove 511 under the action of the compression spring 544. At the same time, the other end of the waist-shaped groove 511 is limited by the rotating rod 52, thereby being able to prevent the support rod 51 from moving or rotating, so that the support rod 51 can prevent the first precast slab 1 from separating from the first mold housing 4.

[0053] In addition, a support block 41 and a lifting ring 42 are fixedly connected to the bottom of the first mold housing 4. The support block 41 is used to support the first mold housing 4, and the lifting ring 42 is used to lift the first mold housing 4.

[0054] In a fourth aspect, the present invention discloses a manufacturing process.

[0055] A manufacturing process, based on the above-mentioned casting mold, for manufacturing the above-mentioned assembled precast thermal insulation wall body, includes the following steps:

[0056] S1. The first steel mesh, the steel bar framework and the second steel mesh are sequentially made in the accommodating cavity of the first mold housing 4. During the process of making the second steel mesh, the steel mesh is supported by the support rod 51;

[0057] S2. The first precast slab 1 is cast in the accommodating cavity;

[0058] S3. After the first precast slab 1 is formed, the support rod 51 is switched from the supporting state to the locked state, and the first precast slab 1 is locked in the first mold housing 4;

[0059] S4. Lift and invert the first mold housing 4, then hoist the first mold housing 4, place the second steel mesh into the second mold housing. After stably supporting the first mold housing 4, pour the second precast slab 2 into the second mold housing to complete the production of the precast part of the assembled precast thermal insulation wall.

[0060] Inspired by the ideal embodiments of the present invention described above, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An assembled prefabricated thermal insulation wall, installed on a floor slab, wherein vertical connecting steel bars are reserved on the floor slab, characterized in that: The invention comprises a first prefabricated plate (1) and a second prefabricated plate (2), wherein the first prefabricated plate (1) and the second prefabricated plate (2) are connected via a steel bar frame, and a cast-in-place area is formed between the first prefabricated plate (1) and the second prefabricated plate (2), and the cast-in-place area is used to be mounted on vertical connecting steel bars.

2. The assembled prefabricated thermal insulation wall according to claim 1, characterized in that: The steel bar frame comprises a first steel bar mesh, a second steel bar mesh and a supporting steel bar mesh (31), wherein the first steel bar mesh is pre-buried in the first prefabricated plate (1), the second steel bar mesh is pre-buried in the second prefabricated plate (2), and one end of the supporting steel bar mesh (31) is connected to the first steel bar mesh and the other end is connected to the second steel bar mesh.

3. The assembled prefabricated thermal insulation wall according to claim 2, characterized in that: The supporting steel mesh (31) comprises a plurality of groups of supporting meshes, wherein the plurality of groups of supporting meshes are arranged along the width direction of the first prefabricated plate (1), and each group of supporting meshes comprises horizontal supporting steel bars (311) and inclined supporting steel bars (312), wherein one end of the horizontal supporting steel bars (311) is connected to the first steel mesh, and the other end is connected to the second steel mesh, and the inclined supporting steel bars (312) are arranged between two adjacent horizontal supporting steel bars (311), and a triangular stable structure is formed between the inclined supporting steel bars (312), the adjacent horizontal supporting steel bars (311), and the first prefabricated plate (1) or the second prefabricated plate (2).

4. The assembled prefabricated thermal insulation wall according to claim 2, characterized in that: The steel frame also includes a prestressed mesh (32), and the prestressed mesh (32) includes supporting connecting steel bars (321), sliding rods (322), sliding sleeves (323) and prestressed steel bars (324). The supporting connecting steel bars are horizontally arranged and connected to the first steel mesh or the second steel mesh. The supporting connecting steel bars (321) are connected to the sliding rods (322). Two sliding rods (322) are provided along the thickness direction of the first prefabricated plate (1) or the second prefabricated plate (2), and each sliding rod (322) is arranged along the width direction. The sliding sleeve (323) slides on the sliding rod (322). The prestressed steel bars (324) are wavy in shape, and the turning point of the prestressed steel bars (324) is connected to the sliding sleeve (323).

5. The assembled prefabricated thermal insulation wall according to claim 4, characterized in that: Both ends of the prestressed steel bar (324) are provided with pre-tensioned anchors (33), and the pre-tensioned anchors (33) include a sleeve (331) and two cone pieces (332). The two cone pieces (332) are arranged in the sleeve (331), and the prestressed steel bar (324) passes through between the two cone pieces (332).

6. The assembled prefabricated thermal insulation wall according to claim 5, characterized in that: The prestressed meshes (32) are provided in a plurality of groups along the vertical direction, and the prestressed steel bars (324) in adjacent prestressed meshes (32) are arranged in a staggered manner.

7. The assembled prefabricated thermal insulation wall according to claim 4, characterized in that: The side wall of the sliding sleeve (323) is provided with an escape notch to escape the supporting connecting steel bars (321).

8. A construction process, characterized in that: The steps include: S1. Hoist the prefabricated thermal insulation wall according to any one of claims 4 to 7 above the floor; S2, lowering the assembled prefabricated insulation wall onto the floor slab, and placing the cast-in-place area on the vertical connecting steel bars; S3, sealing both sides of the cast-in-place area with formwork and pouring concrete into the cast-in-place area; S4. After the concrete in the cast-in-place area is formed, remove the formwork.

9. The construction process according to claim 8, characterized in that: In step S3, before pouring concrete, the prestressed steel bars (324) are pre-tensioned to deform the prestressed steel bars (324) and make the prestressed steel bars (324) contact the vertical connecting steel bars. When the pre-tensioning reaches the design pressure, the pre-tensioning is stopped.

10. The construction process according to claim 9, characterized in that: In step S4, before removing the formwork, the pre-tensioning of the prestressed steel bars (324) is released.

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