A cast-in-place and assembly combined wind tunnel construction method and structure

Abstract

This invention belongs to the field of building technology, and particularly relates to a wind tunnel construction method and structure combining cast-in-place and prefabricated construction. It includes the concrete pouring of the wind tunnel structure's top slab, bottom slab, and cast-in-place sidewalls, as well as the connection of the prefabricated curved section components at the bottom and top of the wind tunnel structure, and the prefabricated sidewalls to the aforementioned concrete structures via tenons and mortises to form tongue-and-groove joints. This invention uses a prefabricated construction method to create the curved sections on the wind tunnel cross-section, avoiding the difficulties of vibration during cast-in-place construction of curved sections, reducing the probability of construction quality problems, and achieving high-quality completion of the wind tunnel's concrete structure. The curved sections are prefabricated in a factory, ensuring a high quality assurance rate for the prefabricated components and enabling precise control of surface flatness. This is of great significance for ensuring the quality of the wind tunnel flow field and improving the quality and accuracy of wind tunnel laboratory tests.

Description

Technical Field

[0001] This invention belongs to the field of building technology, and in particular relates to a wind tunnel construction method and structure that combines cast-in-place and prefabricated construction. Background Technology

[0002] A wind tunnel is a laboratory that can artificially generate and control airflow, and it is one of the most commonly used and effective tools for conducting aerodynamic tests. In recent years, with the improvement of independent R&D capabilities in the automotive industry, aerodynamic design has received increasing attention throughout the entire automotive development process. Wind tunnel testing is an important means of automotive aerodynamic research and a crucial step in automotive design and development. The simulation of the flow field in a wind tunnel depends on the changes in the cross-sectional shape or size of the wind tunnel body. Therefore, wind tunnel bodies have various shapes, such as circular and rectangular, and there are linear and nonlinear gradual changes in cross-sectional dimensions along the airflow direction, making the tunnel body an irregular cross-section, which greatly increases the construction difficulty of wind tunnel engineering. In addition, the smoothness of the inner surface of the wind tunnel concrete has a significant impact on the quality of the flow field, and the design also has high requirements for the smoothness of the inner surface. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the present invention provides a wind tunnel construction method and structure that combines cast-in-place and assembled construction, which is of great significance for improving the smoothness of the inner surface of concrete, ensuring the quality of the wind tunnel flow field, and improving the quality and accuracy of wind tunnel laboratory tests.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This invention provides a wind tunnel construction method combining cast-in-place and prefabricated construction, comprising the following steps:

[0006] S1. Construction of wind tunnel structure base slab and cast-in-place wind tunnel structure sidewalls:

[0007] Erecting a partial formwork support system: Erecting a base slab formwork support assembly, setting base slab side formwork assemblies at the top of both ends of the base slab formwork support assembly, and erecting cast-in-place side wall side formwork assemblies at intervals on the side of each base slab side formwork assembly away from the base slab formwork support assembly. Each base slab side formwork assembly has a protrusion along the vertical direction away from the base slab formwork support assembly to form a tenon, and the inner walls of the two cast-in-place side wall side formwork assemblies are recessed to form a mortise.

[0008] Casting the wind tunnel structure base slab and wind tunnel structure side walls: Concrete is poured into the first casting space formed by the base slab formwork support assembly and the two end base slab side formwork assemblies to form the wind tunnel structure base slab, and concrete is poured into the second casting space formed inside each cast-in-place side wall side formwork assembly to form the cast-in-place wind tunnel structure side walls.

[0009] S2. Install the prefabricated curved section components at the bottom of the wind tunnel structure:

[0010] Partial dismantling of the formwork support system: After the concrete of the wind tunnel structure base slab and the cast-in-place wind tunnel structure sidewalls reaches the design strength, the base slab side formwork components and the cast-in-place sidewall side formwork components are removed. After dismantling, the wind tunnel structure base slab and the cast-in-place wind tunnel structure sidewalls are cured until they reach 80% of the design strength.

[0011] Precast curved section components for the lower part of the wind tunnel structure are installed on both sides of the bottom plate of the wind tunnel structure and between the side walls of each cast-in-place wind tunnel structure: two precast curved section components for the lower part of the wind tunnel structure are provided. Both ends of the precast curved section components for the lower part of the wind tunnel structure are recessed in their own direction to form tenons. The tenons at the top of the precast curved section components for the lower part of the wind tunnel structure are connected to the concrete tenons cast inside the tenons of the bottom plate side formwork assembly to form a tongue and groove. The tenons at the bottom of the precast curved section components for the lower part of the wind tunnel structure are connected to the concrete tenons cast inside the tenons of the side formwork assembly of the cast-in-place side wall to form a tongue and groove.

[0012] S3. Install the prefabricated wind tunnel structure sidewalls:

[0013] Two prefabricated wind tunnel structure sidewalls are provided. The bottom of the prefabricated wind tunnel structure sidewalls is a mortise and tenon, and the top of the cast-in-place wind tunnel structure sidewalls is a tenon. The two prefabricated wind tunnel structure sidewalls are lifted and installed on the top of the two cast-in-place wind tunnel structure sidewalls. The tenons and mortise and tenon are connected to form a tongue and groove.

[0014] S4. Construction of the wind tunnel structure roof slab:

[0015] Erect the remaining formwork support system: Erect a top plate formwork support assembly on the top of the wind tunnel structure bottom plate, set top plate side formwork at the top of both ends of the top plate formwork support assembly, pour concrete in the third pouring space formed by the top plate formwork support assembly and the top plate side formwork to form the wind tunnel structure top plate, wherein each top plate side formwork protrudes in the direction away from the top plate formwork support assembly to form a tenon;

[0016] S5. Install the prefabricated curved section components on the upper part of the wind tunnel structure:

[0017] Remove the top slab side formwork. After demolding, cure the top slab of the wind tunnel structure until it reaches 80% of the design strength. Provide two precast curved section components for the upper part of the wind tunnel structure. Install the precast curved section components for the upper part of the wind tunnel structure between the top slab of the precast wind tunnel structure and the side walls of the wind tunnel structure on both sides. Both ends of the precast curved section components for the upper part of the wind tunnel structure are recessed in their own direction to form tenons. The tenon at the top of the precast curved section components for the upper part of the wind tunnel structure is connected to the concrete tenon poured inside the tenon of the top slab side formwork component to form a tongue and groove. The tenon at the bottom of the precast curved section components for the upper part of the wind tunnel structure is connected to the tenon at the top of the side wall of the precast wind tunnel structure to form a tongue and groove.

[0018] S6. Remove the bottom slab formwork support assembly and the top slab formwork support assembly;

[0019] The precast curved section components of the upper part of the wind tunnel structure and the joints between the precast wind tunnel structure sidewalls and the wind tunnel structure top slab are cured. After the curing meets the design requirements, the bottom slab formwork support components and the top slab formwork support components are removed. After the removal is completed, the flatness of the inner surface of the concrete is inspected until the flatness meets the design requirements. The construction of the concrete wind tunnel structure is then completed.

[0020] Preferably, the template support system includes the base plate template support assembly, the base plate side formwork assembly, the cast-in-place side wall side formwork assembly, the top plate template support assembly, and the top plate side formwork; wherein, the base plate template support assembly and the base plate side formwork assembly together enclose a first casting space for casting the base plate of the wind tunnel structure, the cast-in-place side wall side formwork assembly encloses a second casting space for casting the side walls of the cast-in-place wind tunnel structure, and the top plate template support assembly and the top plate side formwork together enclose a third casting space for casting the top plate of the wind tunnel structure.

[0021] Step S1 further includes: the base plate template support assembly includes a base plate template and a base plate support, the base plate template is used to cast the wind tunnel structure base plate, and the base plate support is located at the bottom of the base plate template to support the base plate template; the base plate side formwork assembly includes a base plate side formwork and a base plate side formwork diagonal brace, the upper end of the base plate side formwork diagonal brace is welded to the lower end of the base plate side formwork, the lower end of the base plate side formwork diagonal brace is fixedly connected to the base plate template, the base plate side formwork has a tenon, and the lower part of the base plate side formwork diagonal brace extends vertically below; the cast-in-place side wall side formwork assembly includes a side wall side formwork and a side wall side formwork support assembly surrounding the outside of the side wall side formwork, the side wall side formwork support assembly includes multiple main ribs and secondary ribs arranged horizontally and vertically, the main ribs and secondary ribs are fixed together by tie bolts, and the inner wall of the side wall side formwork is recessed to form a tenon groove.

[0022] Step S4 further includes: the top plate template support assembly includes a top plate template and a top plate support, the top plate template is used for casting the top plate of the wind tunnel structure, and the top plate support is located between the bottom plate of the wind tunnel structure and the top plate template to support the top plate template.

[0023] This invention also provides a wind tunnel structure combining cast-in-place and prefabricated construction, based on a construction method for a wind tunnel combining cast-in-place and prefabricated construction as described above, comprising a straight section and a curved section; the straight section includes a wind tunnel structure base plate, a wind tunnel structure top plate, two cast-in-place wind tunnel structure side walls, and two prefabricated wind tunnel structure side walls; the curved section includes two lower prefabricated curved section components and two upper prefabricated curved section components; the ends of the wind tunnel structure base plate and the wind tunnel structure top plate are each provided with tenons; the top and outer sides of the cast-in-place wind tunnel structure side walls are provided with tenons; the top of the prefabricated wind tunnel structure side walls are provided with tenons, and the bottom of the prefabricated wind tunnel structure side walls are provided with tenons and mortises; the two ends of the upper prefabricated curved section components of the wind tunnel structure and... The precast curved section component at the bottom of the wind tunnel structure has tenons at both ends; the tenons at both ends of the bottom plate of the wind tunnel structure are connected to the tenons at the bottom of the precast curved section component at the bottom of the wind tunnel structure to form a tongue and groove; the tenons on the outer side of the side wall of the cast-in-place wind tunnel structure are connected to the tenons at the top of the precast curved section component at the bottom of the wind tunnel structure to form a tongue and groove; the tenons at the top of the side wall of the cast-in-place wind tunnel structure are connected to the tenons at the bottom of the side wall of the precast wind tunnel structure to form a tongue and groove; the tenons at the top of the side wall of the precast wind tunnel structure are connected to the tenons at the bottom of the side wall of the precast wind tunnel structure to form a tongue and groove; and the tenons at both ends of the top plate of the wind tunnel structure are connected to the tenons at the bottom of the precast curved section component at the top of the wind tunnel structure to form a tongue and groove.

[0024] Preferably, the construction joint between each tenon and the mortise is a tongue and groove joint.

[0025] Preferably, each of the tenons and the mortises is connected by a wet joint.

[0026] Preferably, the cross-sectional shape of the concrete wind tunnel structure is a rounded rectangle.

[0027] The beneficial effects of this invention are as follows: This invention provides a wind tunnel construction method and structure that combines cast-in-place and prefabricated construction. This effectively solves the problem of complex cross-sections in irregularly shaped wind tunnel concrete structures, which leads to high construction difficulty. By erecting a formwork support system, concrete is poured to form the wind tunnel structure top slab, bottom slab, and cast-in-place sidewalls. By adopting a prefabricated construction method, the precast curved sections of the upper and lower parts of the wind tunnel structure are connected to the top, bottom, and sidewalls of the wind tunnel structure. This avoids the problem of difficult vibration during cast-in-place construction of the curved sections, reduces the probability of construction quality problems, and completes the construction of the tunnel concrete structure with high quality. Since the precast curved sections of the upper and lower parts of the wind tunnel structure are prefabricated in the factory and then assembled on site, the quality assurance rate of the precast components is high, and precise control of surface flatness can be achieved. This is of great significance for ensuring the quality of the wind tunnel flow field and improving the quality and accuracy of wind tunnel laboratory tests. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a wind tunnel construction method and structural step S1 that combines cast-in-place and assembled construction provided by the present invention;

[0029] Figure 2 This is a schematic diagram of a wind tunnel construction method and structural step S2 that combines cast-in-place and assembled construction provided by the present invention;

[0030] Figure 3 This is a schematic diagram of a wind tunnel construction method and structural step S3 that combines cast-in-place and prefabricated construction provided by the present invention;

[0031] Figure 4 This is a schematic diagram of a wind tunnel construction method and structural step S4 that combines cast-in-place and prefabricated construction provided by the present invention;

[0032] Figure 5 This is a schematic diagram of a wind tunnel construction method and structural step S5 that combines cast-in-place and prefabricated construction provided by the present invention.

[0033] Figure 6 This is a schematic diagram of a wind tunnel construction method and structural step S6 that combines cast-in-place and prefabricated construction provided by the present invention;

[0034] Figure 7 yes Figure 1 Enlarged view of a portion of point A in the middle.

[0035] Marked in the image:

[0036] 1. Formwork support system; 11. Base slab formwork support assembly; 12. Base slab side formwork assembly; 121. Base slab side formwork; 122. Base slab side formwork diagonal brace; 13. Cast-in-place side wall side formwork assembly; 131. Side wall side formwork support assembly; 132. Side wall side formwork; 14. Top slab formwork support assembly; 15. Top slab side formwork; 2. Concrete wind tunnel structure; 21. Wind tunnel structure base slab; 211. Base slab side tongue and groove; 22. Cast-in-place wind tunnel structure side wall; 221. Cast-in-place side wall tongue and groove; 222. Cast-in-place side wall top tongue and groove; 23. Lower precast curved section component of wind tunnel structure; 24. Precast wind tunnel structure side wall; 241. Precast side wall top tongue and groove; 25. Wind tunnel structure top slab; 251. Top slab side tongue and groove; 26. Upper precast curved section component of wind tunnel structure.

[0037] The following will describe in detail, with reference to the accompanying drawings, embodiments of the present invention. Detailed Implementation

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0041] like Figures 1-7 As shown in the figure, this embodiment provides a wind tunnel construction method that combines cast-in-place and prefabricated construction, including the following steps:

[0042] S1, such as Figure 1 As shown, the construction of the wind tunnel structure base slab 21 and the cast-in-place wind tunnel structure sidewalls 22 includes: Erecting a partial formwork support system 1: Erecting the base slab formwork support assembly 11; setting base slab sidewall formwork assemblies 12 at the top of both ends of the base slab formwork support assembly 11; and erecting cast-in-place sidewall sidewall formwork assemblies 13 at intervals on the side of each base slab sidewall formwork assembly 12 away from the base slab formwork support assembly 11. Please refer to... Figure 7 As shown, each base plate side formwork assembly 12 protrudes vertically away from the base plate formwork support assembly 11 to form a tenon, and the inner walls of the two cast-in-place side wall side formwork assemblies 13 are recessed to form a tenon groove; the wind tunnel structure base plate 21 and wind tunnel structure side walls are poured: concrete is poured into the first pouring space formed by the base plate formwork support assembly 11 and the two end base plate side formwork assemblies 12 to form the wind tunnel structure base plate 21, and concrete is poured into the second pouring space formed in each cast-in-place side wall side formwork assembly 13 to form the cast-in-place wind tunnel structure side wall 22.

[0043] The base plate formwork support assembly 11 includes a base plate formwork and a base plate support. The base plate formwork is used for pouring the wind tunnel structure base plate 21, and the base plate support is located at the bottom of the base plate formwork to support it. There are two sets of base plate side formwork assemblies 12, located on the left and right sides of the base plate respectively. The base plate side formwork assembly 12 includes a base plate side formwork 121 and a base plate side formwork diagonal brace 122. The upper end of the base plate side formwork diagonal brace 122 is welded to the lower end of the base plate side formwork 121, and the lower end of the base plate side formwork diagonal brace 122 is fixedly connected to the base plate formwork. The base plate side formwork 121 has a tenon, and the lower part of the base plate side formwork diagonal brace 122 extends vertically. The base plate side formwork 121 is a tongue and groove steel plate. The upper end of the base plate side formwork diagonal brace 122 is welded to the lower end of the base plate side formwork 121, and the lower end is fixed to the ground through the base plate formwork. Its function is to prevent the base plate side formwork 121 from shifting during the concrete pouring of the wind tunnel structure base plate 21 and to keep it in a vertical state. The cast-in-place sidewall formwork assembly 13 includes a sidewall formwork 132 and a sidewall formwork support assembly 131 surrounding it. The sidewall formwork support assembly 131 includes multiple main and secondary ribs arranged horizontally and vertically. The main ribs extend horizontally and are spaced apart, while the secondary ribs extend vertically and are spaced apart. After the main and secondary ribs are placed in their preset positions, each pair of main and secondary ribs is fixed in position by tie bolts. If necessary, the sidewall formwork 132 is reinforced by diagonal bracing. The sidewall formwork support assembly 131 is used to bear the pressure from the sidewall formwork 132 during concrete pouring, making the sidewall formwork 132 less prone to deformation during subsequent concrete pouring. Furthermore, the inner wall of the sidewall formwork is recessed to form a tenon groove, i.e., a tongue and groove joint.

[0044] Specifically, the concrete wind tunnel structure 2 has a rounded rectangular cross-section, consisting of straight and curved segments. The straight segments include the wind tunnel structure base slab 21, the wind tunnel structure top slab 25, the cast-in-place wind tunnel structure sidewalls 22, and the precast wind tunnel structure sidewalls 24. The curved segments include the lower precast curved segment components 23 and the upper precast curved segment components 26. The entire formwork support system 1 includes the base slab formwork support assembly 11, the base slab side formwork assembly 12, the cast-in-place sidewall side formwork assembly 13, the top slab formwork support assembly 14, and the top slab side formwork 15. The construction of the wind tunnel structure base slab 21 and the cast-in-place wind tunnel structure sidewalls 22 involves first erecting the base slab formwork support assembly 11, the base slab side formwork assembly 12, and the cast-in-place sidewall side formwork assembly 13. After completion, the concrete for the wind tunnel structure base slab 21 and the cast-in-place wind tunnel structure sidewalls 22 is poured, and the construction quality of vibration and finishing is controlled to ensure the flatness of the inner surface of the concrete.

[0045] S2, such as Figure 2As shown, the installation of the precast curved section component 23 of the lower part of the wind tunnel structure is carried out; part of the formwork support system 1 is removed; after the concrete of the wind tunnel structure bottom slab 21 and the cast-in-place wind tunnel structure sidewall 22 reaches the design strength, the bottom slab side formwork component 12 and the cast-in-place sidewall side formwork component 13 are removed. After demolding, the wind tunnel structure bottom slab 21 and the cast-in-place wind tunnel structure sidewall 22 are cured until they reach 80% of the design strength; the lower part of the wind tunnel structure is installed on both sides of the wind tunnel structure bottom slab 21 and between each cast-in-place wind tunnel structure sidewall 22. Precast curved segment component 23: Two precast curved segment components 23 are provided for the lower part of the wind tunnel structure. Both ends of the precast curved segment component 23 are recessed in the direction of itself to form a tenon. The tenon at the top of the precast curved segment component 23 is connected to the concrete tenon poured inside the tenon of the bottom plate side formwork component 12 to form a tongue and groove. The tenon at the bottom of the precast curved segment component 23 is connected to the concrete tenon poured inside the tenon of the cast-in-place side wall side formwork component 13 to form a tongue and groove.

[0046] Specifically, after the concrete reaches the design strength, the bottom slab side formwork assembly 12 and the cast-in-place sidewall side formwork assembly 13 are removed. After demolding, the wind tunnel structure bottom slab 21 and the cast-in-place wind tunnel structure sidewall 22 are cured until they reach 80% of the design strength. Then, the precast curved section component 23 of the lower part of the wind tunnel structure is installed. There are two precast curved section components 23 of the lower part of the wind tunnel structure, located on both sides of the bottom slab between the cast-in-place wind tunnel structure sidewall 22 and the bottom slab of the wind tunnel structure. The construction joint between the precast curved section component 23 of the lower part of the wind tunnel structure and the cast-in-place wind tunnel structure sidewall 22 is a tongue and groove joint, and the connection joint is a wet joint. The construction joint between the precast curved section component 23 of the lower part of the wind tunnel structure and the bottom slab of the wind tunnel structure is a tongue and groove joint, and the connection joint is a wet joint. The top of the cast-in-place wind tunnel structure sidewall 22 is a tongue and groove joint 222. The tongue and groove joint can enhance the stability of the connection between concrete components and also ensure the airtightness of the wind tunnel flow channel.

[0047] S3, such as Figure 3 As shown, the prefabricated wind tunnel structure sidewall 24 is installed: two prefabricated wind tunnel structure sidewalls 24 are provided. The bottom of the prefabricated wind tunnel structure sidewall 24 is a mortise and tenon, and the top of the cast-in-place wind tunnel structure sidewall 22 is a tenon. The two prefabricated wind tunnel structure sidewalls 24 are lifted and installed on the top of the two cast-in-place wind tunnel structure sidewalls 22. The tenon and mortise and tenon are connected to form a tongue and groove.

[0048] Specifically, there are two precast wind tunnel structure sidewalls 24, located on the upper part of the cast-in-place wind tunnel structure sidewalls 22 on both sides of the wind tunnel structure base slab 21. After the precast curved section components 23 of the lower part of the wind tunnel structure are installed, the precast wind tunnel structure sidewalls 24 are lifted and installed. The construction joint at the junction of the precast wind tunnel structure sidewalls 24 and the cast-in-place wind tunnel structure sidewalls 22 on both sides of the wind tunnel structure base slab 21 is a tongue and groove joint, and the connection joint is a wet joint. The top of the precast wind tunnel structure sidewalls 24 is a precast sidewall top tongue and groove joint 241.

[0049] S4, such as Figure 4 As shown, the construction of the wind tunnel structure top slab 25 is as follows: the remaining part of the formwork support system 1 is erected: a top slab formwork support assembly 14 is erected on the top of the wind tunnel structure bottom slab 21, and top slab side formwork 15 is set at the top of both ends of the top slab formwork support assembly 14. Concrete is poured in the third pouring space formed by the top slab formwork support assembly 14 and the top slab side formwork 15 to form the wind tunnel structure top slab 25. Each top slab side formwork 15 protrudes in the direction away from the top slab formwork support assembly 14 to form a tenon.

[0050] Specifically, without dismantling the bottom slab formwork support assembly 11, the top slab formwork support assembly 14 and the top slab side formwork 15 are erected. The bottom slab formwork support assembly 11 includes the top slab formwork and the top slab support. The top slab formwork is used to pour the wind tunnel structure top slab 25. The top slab support is located between the wind tunnel structure bottom slab 21 and the top slab formwork to support the top slab formwork. There are two sets of top slab side formwork 15, which are tongue and groove steel plates, located on both sides of the top slab formwork support assembly 14. After the formwork is erected, the concrete for the wind tunnel structure top slab 25 is poured. The construction quality of vibration and finishing is controlled to ensure the flatness of the inner surface of the concrete.

[0051] S5, such as Figure 5 As shown, the prefabricated curved section component 26 of the upper part of the wind tunnel structure is installed: the top plate side formwork 15 is removed, and after demolding, the top plate 25 of the wind tunnel structure is cured until it reaches 80% of the design strength. Two prefabricated curved section components 26 of the upper part of the wind tunnel structure are provided. The prefabricated curved section components 26 of the upper part of the wind tunnel structure are installed between the prefabricated top plate 25 of the wind tunnel structure and the side walls of the wind tunnel structure on both sides. Both ends of the prefabricated curved section component 26 of the upper part of the wind tunnel structure are recessed in their own direction to form a tenon. The tenon at the top of the prefabricated curved section component 26 of the upper part of the wind tunnel structure is connected with the concrete tenon poured inside the tenon of the top plate side formwork component to form a tongue and groove. The tenon at the bottom of the prefabricated curved section component 26 of the upper part of the wind tunnel structure is connected with the tenon at the top of the prefabricated side wall 24 of the wind tunnel structure to form a tongue and groove.

[0052] Specifically, after the concrete reaches the design strength, the top slab side formwork 15 is removed. The side of the wind tunnel structure top slab 25 has a tongue-and-groove joint 251. After demolding, the wind tunnel structure top slab 25 is cured until it reaches 80% of the design strength. Then, the precast curved section component 26 of the upper part of the wind tunnel structure is installed. There are two precast curved section components 26 of the upper part of the wind tunnel structure, located between the precast wind tunnel structure side wall 24 and the wind tunnel structure top slab 25, respectively. The construction joint between the precast curved section component 26 of the upper part of the wind tunnel structure and the precast wind tunnel structure side wall 24 is a tongue-and-groove joint, and the connection joint is a wet joint. The tongue-and-groove joint can enhance the stability of the connection between concrete components and also ensure the airtightness of the wind tunnel flow channel.

[0053] S6, such as Figure 6 As shown, the bottom slab formwork support assembly 11 and the top slab formwork support assembly 14 are removed; the joints between the precast curved section component 26 and the precast wind tunnel structure sidewall 24 and the wind tunnel structure top slab 25 are cured. After the curing meets the design requirements, the bottom slab formwork support assembly 11 and the top slab formwork support assembly 14 are removed. After the removal is completed, the flatness of the inner surface of the concrete is inspected until the flatness meets the design requirements. The construction of the concrete wind tunnel structure 2 is completed.

[0054] Specifically, the wet joints between the precast curved section component 26 on the upper part of the wind tunnel structure and the precast wind tunnel structure sidewall 24 and the wind tunnel structure top slab 25 are cured. After the design requirements are met, the bottom slab formwork support assembly 11 and the top slab formwork support assembly 14 are removed. The top slab formwork support assembly 14 is removed first, and then the bottom slab formwork support assembly 11 is removed. After the removal is completed, the flatness of the inner surface of the concrete is inspected. If the flatness meets the design requirements, the overall construction of the concrete wind tunnel structure 2 is completed.

[0055] It should be noted that the formwork support system 1 includes a bottom slab formwork support assembly 11, a bottom slab side formwork assembly 12, a cast-in-place side wall side formwork assembly 13, a top slab formwork support assembly 14, and a top slab side formwork 15; wherein, the bottom slab formwork support assembly 11 and the bottom slab side formwork assembly 12 together form a first pouring space for pouring to form the bottom slab 21 of the wind tunnel structure, the cast-in-place side wall side formwork assembly 13 forms a second pouring space for pouring to form the side wall 22 of the cast-in-place wind tunnel structure, and the top slab formwork support assembly 14 and the top slab side formwork 15 together form a third pouring space for pouring to form the top slab 25 of the wind tunnel structure.

[0056] This embodiment provides a wind tunnel construction method and structure that combines cast-in-place and prefabricated construction. It effectively solves the problem of complex cross-sections in irregularly shaped wind tunnel concrete structures, which leads to high construction difficulty. A formwork support system 1 is erected to pour concrete, forming the wind tunnel structure top slab 25, bottom slab 21, and cast-in-place wind tunnel sidewalls 22. Prefabricated construction methods are used to connect the precast curved segments 26 (upper part) and 23 (lower part) of the wind tunnel structure with the top slab 25, bottom slab 21, precast sidewalls 24, and cast-in-place concrete. The connection of the wind tunnel structure sidewall 22 avoids the problem of difficult vibration during the construction of curved sections of concrete using the cast-in-place method, reduces the probability of construction quality issues, and completes the construction of the tunnel concrete structure with high quality. Since the curved section concrete components such as the upper precast curved section component 26 and the lower precast curved section component 23 of the wind tunnel structure are precast in the factory and then assembled on site, the quality assurance rate of the precast components is high, and the surface flatness can be precisely controlled. This is of great significance for ensuring the quality of the wind tunnel flow field and improving the quality and accuracy of wind tunnel laboratory tests.

[0057] This embodiment also provides a wind tunnel structure combining cast-in-place and prefabricated construction. A construction method for a wind tunnel combining cast-in-place and prefabricated construction based on any of the above-mentioned methods includes straight sections and curved sections. The straight sections include a wind tunnel structure base slab 21, a wind tunnel structure top slab 25, two cast-in-place wind tunnel structure sidewalls 22, and two prefabricated wind tunnel structure sidewalls 24. The curved sections include two lower prefabricated curved section components 23 and two upper prefabricated curved section components 26. The ends of the wind tunnel structure base slab 21 and the wind tunnel structure top slab 25 both have tenons. The top and outer sides of the cast-in-place wind tunnel structure sidewalls 22 have tenons. The top of the prefabricated wind tunnel structure sidewalls 24 has a tenon, and the bottom has a mortise. The upper prefabricated curved section components 23... The two ends of the precast curved section component 23 at the bottom of the wind tunnel structure have mortises; the tenons at both ends of the bottom plate 21 of the wind tunnel structure are connected to the mortises at the bottom of the precast curved section component 23 at the bottom of the wind tunnel structure to form a tongue and groove; the tenons on the outside of the side wall 22 of the cast-in-place wind tunnel structure are connected to the mortises at the top of the precast curved section component 23 at the bottom of the wind tunnel structure to form a tongue and groove; the tenons at the top of the side wall 22 of the cast-in-place wind tunnel structure are connected to the mortises at the bottom of the side wall 24 of the precast wind tunnel structure to form a tongue and groove; the tenons at the top of the side wall 24 of the precast wind tunnel structure are connected to the mortises at the bottom of the side wall 24 of the precast wind tunnel structure to form a tongue and groove; and the tenons at both ends of the top plate 25 of the wind tunnel structure are connected to the mortises at the bottom of the precast curved section component 26 at the top of the wind tunnel structure to form a tongue and groove.

[0058] This embodiment provides a wind tunnel structure that combines cast-in-place and prefabricated construction, based on any of the above-mentioned wind tunnel construction methods that combine cast-in-place and prefabricated construction. Therefore, it has all the advantages of the above-mentioned construction methods, which will not be elaborated here.

[0059] The foregoing detailed examples of the present invention are merely preferred embodiments and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A wind tunnel construction method combining cast-in-place and assembly, characterized by, Includes the following steps: S1. Construction of wind tunnel structure base slab and cast-in-place wind tunnel structure sidewalls: Erecting a partial formwork support system: Erecting a base slab formwork support assembly, setting base slab side formwork assemblies at the top of both ends of the base slab formwork support assembly, and erecting cast-in-place side wall side formwork assemblies at intervals on the side of each base slab side formwork assembly away from the base slab formwork support assembly. Each base slab side formwork assembly has a protrusion along the vertical direction away from the base slab formwork support assembly to form a tenon, and the inner walls of the two cast-in-place side wall side formwork assemblies are recessed to form a mortise. Casting the wind tunnel structure base slab and wind tunnel structure side walls: Concrete is poured into the first casting space formed by the base slab formwork support assembly and the two end base slab side formwork assemblies to form the wind tunnel structure base slab, and concrete is poured into the second casting space formed inside each cast-in-place side wall side formwork assembly to form the cast-in-place wind tunnel structure side walls. S2. Install the prefabricated curved section components at the bottom of the wind tunnel structure: Partial dismantling of the formwork support system: After the concrete of the wind tunnel structure base slab and the cast-in-place wind tunnel structure sidewalls reaches the design strength, the base slab side formwork components and the cast-in-place sidewall side formwork components are removed. After dismantling, the wind tunnel structure base slab and the cast-in-place wind tunnel structure sidewalls are cured until they reach 80% of the design strength. Precast curved section components for the lower part of the wind tunnel structure are installed on both sides of the bottom plate of the wind tunnel structure and between the side walls of each cast-in-place wind tunnel structure: two precast curved section components for the lower part of the wind tunnel structure are provided. Both ends of the precast curved section components for the lower part of the wind tunnel structure are recessed in their own direction to form tenons. The tenons at the top of the precast curved section components for the lower part of the wind tunnel structure are connected to the concrete tenons cast inside the tenons of the bottom plate side formwork assembly to form a tongue and groove. The tenons at the bottom of the precast curved section components for the lower part of the wind tunnel structure are connected to the concrete tenons cast inside the tenons of the side formwork assembly of the cast-in-place side wall to form a tongue and groove. S3. Install the prefabricated wind tunnel structure sidewalls: Two prefabricated wind tunnel structure sidewalls are provided. The bottom of the prefabricated wind tunnel structure sidewalls is a mortise and tenon, and the top of the cast-in-place wind tunnel structure sidewalls is a tenon. The two prefabricated wind tunnel structure sidewalls are lifted and installed on the top of the two cast-in-place wind tunnel structure sidewalls. The tenons and mortise and tenon are connected to form a tongue and groove. S4. Construction of the wind tunnel structure roof slab: Erect the remaining formwork support system: Erect a top plate formwork support assembly on the top of the wind tunnel structure bottom plate, set top plate side formwork at the top of both ends of the top plate formwork support assembly, pour concrete in the third pouring space formed by the top plate formwork support assembly and the top plate side formwork to form the wind tunnel structure top plate, wherein each top plate side formwork protrudes in the direction away from the top plate formwork support assembly to form a tenon; S5. Install the prefabricated curved section components on the upper part of the wind tunnel structure: Remove the top slab side formwork. After demolding, cure the top slab of the wind tunnel structure until it reaches 80% of the design strength. Provide two precast curved section components for the upper part of the wind tunnel structure. Install the precast curved section components for the upper part of the wind tunnel structure between the top slab of the precast wind tunnel structure and the side walls of the wind tunnel structure on both sides. Both ends of the precast curved section components for the upper part of the wind tunnel structure are recessed in their own direction to form tenons. The tenon at the top of the precast curved section components for the upper part of the wind tunnel structure is connected to the concrete tenon poured inside the tenon of the top slab side formwork component to form a tongue and groove. The tenon at the bottom of the precast curved section components for the upper part of the wind tunnel structure is connected to the tenon at the top of the side wall of the precast wind tunnel structure to form a tongue and groove. S6. Remove the bottom slab formwork support assembly and the top slab formwork support assembly; The precast curved section components of the upper part of the wind tunnel structure and the joints between the precast wind tunnel structure sidewalls and the wind tunnel structure top slab are cured. After the curing meets the design requirements, the bottom slab formwork support components and the top slab formwork support components are removed. After the removal is completed, the flatness of the inner surface of the concrete is inspected until the flatness meets the design requirements. The construction of the concrete wind tunnel structure is then completed.

2. A cast-in-place and assembled wind tunnel construction method as claimed in claim 1, characterized in that, The formwork support system includes the bottom slab formwork support assembly, the bottom slab side formwork assembly, the cast-in-place side wall side formwork assembly, the top slab formwork support assembly, and the top slab side formwork; The base plate formwork support assembly and the base plate side formwork assembly together form a first pouring space for pouring and forming the base plate of the wind tunnel structure; the cast-in-place side wall side formwork assembly forms a second pouring space for pouring and forming the side wall of the cast-in-place wind tunnel structure; and the top plate formwork support assembly and the top plate side formwork together form a third pouring space for pouring and forming the top plate of the wind tunnel structure.

3. A cast-in-place and assembled wind tunnel construction method as claimed in claim 1, characterized in that, Step S1 also includes: The base plate template support assembly includes a base plate template and a base plate support. The base plate template is used to cast the base plate of the wind tunnel structure, and the base plate support is located at the bottom of the base plate template to support the base plate template.

4. A cast-in-place and assembled wind tunnel construction method according to any one of claims 1 to 3, characterized in that, Step S1 also includes: The base plate side mold assembly includes a base plate side template and a base plate side mold diagonal brace. The upper end of the base plate side mold diagonal brace is welded to the lower end of the base plate side template, and the lower end of the base plate side mold diagonal brace is fixedly connected to the base plate template. The base plate side template has a tenon, and the base plate side mold diagonal brace extends vertically downwards.

5. A cast-in-place and assembled wind tunnel construction method according to any one of claims 1 to 3, characterized in that, Step S1 also includes: The cast-in-place side wall formwork assembly includes a side wall formwork and a side wall formwork support assembly surrounding the outside of the side wall formwork. The side wall formwork support assembly includes multiple main ribs and secondary ribs arranged in a cross pattern. The main ribs and secondary ribs are fixed together by tie bolts. The inner wall of the side wall formwork is recessed to form a tenon groove.

6. A cast-in-place and assembled wind tunnel construction method as defined in claim 1, wherein Step S4 also includes: The top plate formwork support assembly includes a top plate formwork and a top plate support. The top plate formwork is used for casting the top plate of the wind tunnel structure, and the top plate support is located between the bottom plate of the wind tunnel structure and the top plate formwork to support the top plate formwork.

7. A wind tunnel structure of cast-in-place and assembly combination based on the construction method of cast-in-place and assembly combination according to any one of claims 1 to 6, characterized in that, Includes straight segments and curved segments; The straight section includes the wind tunnel structure bottom plate, the wind tunnel structure top plate, two cast-in-place wind tunnel structure side walls and two precast wind tunnel structure side walls; the curved section includes two precast curved section components at the lower part of the wind tunnel structure and two precast curved section components at the upper part of the wind tunnel structure. The ends of the bottom plate and top plate of the wind tunnel structure are all tenons. The top and outer sides of the side wall of the cast-in-place wind tunnel structure are tenons. The top of the side wall of the precast wind tunnel structure is a tenon and the bottom is a mortise. The two ends of the upper precast curved section component of the wind tunnel structure and the two ends of the lower precast curved section component of the wind tunnel structure are mortise. The tenons at both ends of the bottom plate of the wind tunnel structure are connected to the mortises at the bottom of the precast curved section component of the lower part of the wind tunnel structure to form a tongue and groove. The tenons on the outer side of the side wall of the cast-in-place wind tunnel structure are connected to the mortises at the top of the precast curved section component of the lower part of the wind tunnel structure to form a tongue and groove. The tenons at the top of the side wall of the cast-in-place wind tunnel structure are connected to the mortises at the bottom of the side wall of the precast wind tunnel structure to form a tongue and groove. The tenons at the top of the side wall of the precast wind tunnel structure are connected to the mortises at the bottom of the side wall of the precast wind tunnel structure to form a tongue and groove. The tenons at both ends of the top plate of the wind tunnel structure are connected to the mortises at the bottom of the precast curved section component of the upper part of the wind tunnel structure to form a tongue and groove.

8. A cast-in-place and assembled wind tunnel structure according to claim 7, characterized in that The construction joint between each of the tenons and the mortises is a tongue and groove joint.

9. A cast-in-place and assembled wind tunnel structure according to claim 8, characterized in that Each of the tenons and the mortises is connected by a wet joint.

10. A cast-in-place and assembled wind tunnel structure according to any one of claims 7-9, characterized in that The cross-sectional shape of the concrete wind tunnel structure is a rounded rectangle.

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