Construction method for prefabricated middle partition wall of tunnel ventilation inclined shaft

Abstract

The invention relates to a construction method for a prefabricated middle partition wall of a tunnel ventilation inclined shaft. The construction method comprises the steps that S1, the mounting position of the middle partition wall in the ventilation inclined shaft is determined through a measuring instrument; s2, a bottom supporting structure with a positioning groove is poured in the positioning position, and the height of the bottom supporting structure is adjusted according to the height of the inclined shaft; s3, the bottoms of the galvanized I-shaped steel stand columns are embedded into the positioning grooves and fixed through concrete, and a plurality of I-shaped steel stand columns are longitudinally arranged at intervals; s4, L-shaped angle steel and expansion bolts are adopted for fixing the top of the I-shaped steel stand column and a tunnel lining, one side of the angle steel is fixed to the lining, and a pressing space is reserved on the other side of the angle steel; s5, the light precast blocks are sequentially embedded between the I-shaped steel stand columns through mechanical hoisting equipment, and the adjacent precast blocks are connected through tongue-and-groove structures matched in a concave-convex mode; s6, sealing materials are filled in the rabbet seam to form a continuous sealing layer; the problems that the construction quality of an existing reinforced concrete mid-partition wall is difficult to control, the construction period is long, and the wind flow on-way resistance is large are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel engineering, and specifically relates to a construction method for a prefabricated assembled middle partition wall of a tunnel ventilation inclined shaft, and more particularly to a modular assembly process based on autoclaved aerated concrete prefabricated blocks and a steel-concrete composite structure. Background Art

[0002] In the traditional field of extra-long tunnel ventilation, the partition walls of ventilation inclined shafts are mostly made of reinforced concrete, which has the following significant disadvantages:

[0003] Long construction period: The inclined shaft needs to be used as a channel for transporting slag during the construction of the main tunnel of the extra-long tunnel. As a result, the middle partition wall needs to be constructed after the main tunnel is penetrated. The construction speed of the cast-in-place concrete middle partition wall is slow, which seriously restricts the total construction period of the tunnel.

[0004] The construction quality is difficult to control: the inclined shaft has a small clearance section, which makes vehicle transportation difficult, and the thickness of the middle partition wall is relatively thin. The construction quality of the thin cast-in-place concrete is difficult to control, such as loose vibration and easy cracking, which in turn affects the ventilation effect.

[0005] Large ventilation loss: There are construction joints in cast-in-place concrete, which will cause large air flow resistance along the left and right air ducts and obvious air volume loss.

[0006] Insufficient environmental protection and economy: The cast-in-place process involves a lot of wet operations on site, generating a lot of dust and noise pollution, a large amount of concrete consumption, and high material transportation and labor costs, which does not conform to the national green assembly construction concept.

[0007] In order to further optimize the tunnel ventilation structure and combine the national green assembly design concept, the existing technology proposes the use of prefabricated and assembled middle partition walls made of new materials. However, in the tunnel ventilation inclined shaft scenario, it still faces technical bottlenecks such as poor sealing of prefabricated component connections, insufficient wind pressure resistance, and complex construction technology. It is urgent to develop a prefabricated and assembled middle partition wall construction method suitable for tunnel ventilation inclined shafts to solve the problems of long construction period, poor quality, and large ventilation loss in existing reinforced concrete middle partition walls. Summary of the Invention

[0008] In view of this, the purpose of the present invention is to overcome the shortcomings of the existing related technologies and provide a construction method for prefabricated and assembled central partition walls in tunnel ventilation inclined shafts. The purpose is to overcome the problems existing in the cast-in-place construction of central partition walls in existing tunnel ventilation inclined shafts, such as long construction period, difficult quality control, large ventilation loss and insufficient environmental protection. A construction method based on the concept of prefabricated assembly is provided, which achieves multiple technical effects of shortening construction period, improving structural stability and ventilation efficiency, reducing energy consumption and construction costs through modular design, steel-concrete combined support, tongue-and-groove sealing technology and mechanized assembly, and at the same time conforms to the national concept of green assembly construction.

[0009] In order to achieve the above-mentioned object, the present invention provides a construction method for a prefabricated and assembled middle partition wall of a tunnel ventilation inclined shaft, wherein the prefabricated and assembled middle partition wall structure adopted comprises at least a bottom support structure, a steel support assembly and a prefabricated modular wall panel; the top surface of the bottom support structure is provided with a positioning groove, and the bottom of the steel support assembly is embedded in the positioning groove and fixed; the prefabricated modular wall panel is formed by splicing a plurality of prefabricated panels, and adjacent prefabricated panels are connected by a tongue-and-groove structure with concave and convex fitting, and the tongue-and-groove joints are filled with sealing material; the steel support assemblies are arranged at intervals in the longitudinal direction, and their tops are fixed to the tunnel lining to form a steel-concrete composite structure supporting the prefabricated modular wall panels; the steel support assemblies and the prefabricated modular wall panels form a steel-concrete prefabricated structure, thereby enhancing the stability of the overall structure;

[0010] The construction method includes the following steps:

[0011] S1. Measurement and positioning: Use measuring instruments to determine the installation position of the intermediate partition wall in the ventilation shaft;

[0012] S2. Bottom support construction: Cast a bottom support structure with positioning grooves at the positioning position. The height of the bottom support structure is adjusted according to the height of the inclined shaft;

[0013] S3. Install the steel support assembly: Insert the bottom of the galvanized I-beam columns into the positioning slots and secure them with concrete. Install multiple I-beam columns at intervals along the length of the column.

[0014] S4. Top connection: Use L-shaped angle steel and expansion bolts to secure the top of the I-beam column to the tunnel lining. One side of the angle steel is fixed to the lining, while the other side is left with space for compression.

[0015] S5. Prefabricated modular wall panel assembly: Lightweight prefabricated blocks are sequentially inserted between I-beam columns using mechanized lifting equipment. Adjacent prefabricated blocks are connected using a tongue-and-groove structure.

[0016] S6. Sealing treatment: Fill the tongue-and-groove joints with sealing material to form a continuous sealing layer;

[0017] S7. Top compression and fixation: Adjust the reserved side of the angle steel to compress the top of the prefabricated wall panel to form a steel-concrete composite structure.

[0018] Furthermore, the bottom supporting structure is a concrete pier, the positioning groove is a V-shaped positioning groove, and the bottom of the steel support assembly is fixed in the V-shaped positioning groove by pouring concrete.

[0019] Furthermore, the steel support assembly includes galvanized I-beam columns and cross braces, and the galvanized I-beam columns are arranged at intervals of 5 prefabricated panels in the longitudinal direction.

[0020] Furthermore, the top of the steel support assembly is fixed to the tunnel concrete lining by L-shaped angle steel and expansion bolts. The top of the steel support assembly is filled with anti-cracking mortar. One side of the angle steel is fixed to the lining, and the other side presses the top of the prefabricated modular wall panel.

[0021] Furthermore, the tongue-and-groove structure is a modular assembly interface, which is used to reduce the resistance along the airflow and improve the ventilation efficiency.

[0022] Furthermore, the sealing material includes a thick resin sealant, and the resin sealant is continuously coated along the edge of the tongue and groove.

[0023] Furthermore, the prefabricated modular wall panels are autoclaved aerated concrete prefabricated blocks, the specifications of a single prefabricated block are 60 cm×300 cm, the thickness is 12 cm, and the radius of the tongue-and-groove structure is 5 mm and the angle is 90°.

[0024] The present invention adopts a prefabricated and assembled construction process and a steel-concrete composite structure, which has at least the following beneficial effects: autoclaved aerated concrete blocks and galvanized I-beam components are prefabricated in the factory, and on-site mechanized assembly replaces the cast-in-place process, shortening the construction period and reducing manpower input; the bottom V-shaped positioning groove concrete pier and the I-beam column form a stable support, and the top L-shaped angle steel is fixed to enhance the overall sealing; adjacent prefabricated blocks are connected with concave and convex tongue and groove and filled with anti-cracking mortar and resin sealant, which reduces the resistance of airflow along the way and improves ventilation efficiency; the lightweight material reduces the thickness of the middle partition wall from 30cm to 12cm, saving concrete consumption and reducing transportation energy consumption, which is in line with the concept of green construction; the adjustable concrete pier design can adapt to different inclined shaft heights, and the modular layout improves the applicability of the project, promoting the upgrading of assembled construction technology in highway tunnels. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a flow chart of the construction method of the prefabricated assembled center partition wall of the tunnel ventilation inclined shaft of the present invention.

[0027] Figure 2 This is a cross-sectional view of the assembled intermediate partition wall structure of the tunnel ventilation inclined shaft;

[0028] Figure 3 This is the elevation drawing of the assembled middle partition wall structure of the invented tunnel ventilation inclined shaft;

[0029] Figure 4It is a schematic diagram of the adjacent connection structure of precast slabs;

[0030] Figure 5 It is a schematic diagram of the top structure of the invention;

[0031] Figure 6 It is a schematic diagram of the bottom structure of the invention.

[0032] In the figure: 1. Prefabricated and assembled middle partition wall structure; 2. Bottom support structure; 3. Steel support assembly; 4. Prefabricated modular wall panel; 5. Positioning groove; 6. Angle steel; 7. Tongue-and-groove structure; 8. Anti-crack mortar filling; 9. Expansion bolt. Detailed implementation manners

[0033] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the invention. On the contrary, they are only examples of devices and methods consistent with some aspects of the invention as detailed in the appended claims.

[0034] Embodiment 1

[0035] Please refer to Figures 1 to 6 As shown, this embodiment provides a construction method for a prefabricated and assembled middle partition wall of a tunnel ventilation inclined shaft, which is used in a tunnel ventilation inclined shaft. The prefabricated and assembled middle partition wall structure 1 at least includes a bottom support structure 2, a steel support assembly 3, and a prefabricated modular wall panel 4;

[0036] The top surface of the bottom support structure 2 is provided with a positioning groove 5, and the bottom of the steel support assembly 3 is embedded in the positioning groove 5 and fixed; the prefabricated modular wall panel 4 is formed by splicing a plurality of precast slabs, and the adjacent precast slabs are connected by a tongue-and-groove structure 7 with concave-convex cooperation, and the tongue-and-groove joint is filled with a sealing material; the steel support assemblies 3 are arranged at intervals longitudinally, and their tops are fixed to the tunnel lining to form a steel-concrete composite structure for supporting the prefabricated modular wall panel 4; the steel support assembly 3 and the prefabricated modular wall panel 4 form a steel-concrete precast structure to enhance the overall structural stability.

[0037] The construction method includes the following steps:

[0038] S1. Measurement and positioning: Determine the installation position of the middle partition wall in the ventilation inclined shaft through measuring instruments;

[0039] S2. Bottom support construction: Pour the bottom support structure with a positioning groove at the positioning position, and the height of the bottom support structure is adjusted according to the height of the inclined shaft;

[0040] S3. Installation of steel support components: Embed the bottom of the galvanized I-beam column into the positioning groove and fix it with concrete, and arrange multiple I-beam columns at longitudinal intervals.

[0041] S4. Top fixed connection: Use L-shaped angle steel and expansion bolts to fix the top of the I-beam column to the tunnel lining. One side of the angle steel is fixed to the lining, and a pressing space is reserved on the other side.

[0042] S5. Assembly of prefabricated modular wall panels: Embed the lightweight precast blocks between the I-beam columns in sequence through a mechanized hoisting device, and connect the adjacent precast blocks through a tongue-and-groove structure with male and female fits.

[0043] S6. Joint sealing treatment: Fill the tongue-and-groove joint with a sealing material to form a continuous sealing layer.

[0044] S7. Top pressing and fixing: Adjust the reserved side of the angle steel to press the top of the precast wall panel to form a steel-concrete composite structure.

[0045] As an implementation manner, in this embodiment, the bottom support structure 2 is a concrete pier, the positioning groove 5 is a V-shaped positioning groove 5, and the bottom of the steel support component 3 is filled and fixed in the V-shaped positioning groove 5 through the anti-cracking mortar filling 8.

[0046] As an implementation manner, in this embodiment, the steel support component 3 includes galvanized I-beam columns and cross braces, and one galvanized I-beam column is arranged at longitudinal intervals of 5 precast panels.

[0047] As an implementation manner, in this embodiment, the top of the steel support component 3 is fixed to the tunnel concrete lining through the L-shaped angle steel 6 and the expansion bolt 9. The top of the steel support component 3 is filled with the anti-cracking mortar filling 8. One side of the angle steel 6 is fixed to the lining, and the other side presses the top of the prefabricated modular wall panel 4.

[0048] As an implementation manner, in this embodiment, the tongue-and-groove structure 7 is a modular assembly interface, which is used to reduce the frictional resistance along the air flow and improve the ventilation efficiency.

[0049] As an implementation manner, in this embodiment, the sealing material includes a thick resin-based sealant, and the resin-based sealant is continuously coated along the edge of the tongue-and-groove joint.

[0050] As an implementation manner, in this embodiment, the prefabricated modular wall panel 4 is an autoclaved aerated concrete precast block. The specification of a single precast block is 60 cm × 300 cm, the thickness is 12 cm, and the radius of the tongue-and-groove structure 7 is 5 mm and the angle is 90°.

[0051] The main material of this prefabricated middle partition wall is autoclaved aerated concrete, which is a lightweight material. This lightweight material has good strength, low self-weight, is convenient for construction, and the product modules prefabricated in the factory have good fit, high quality, and better ventilation and sealing performance. In this embodiment, a steel-concrete prefabricated structure is used in the tunnel ventilation inclined shaft for the first time. Galvanized I-beams are used as columns and cross braces, and autoclaved aerated concrete is used as prefabricated modules. The use of the steel-concrete prefabricated structure greatly reduces the construction period and improves the construction quality while ensuring the ventilation effect.

[0052] Embodiment 2

[0053] Please refer to Figures 1 to 5 As shown in the figure, this embodiment provides a prefabricated and assembled middle partition wall structure for a tunnel ventilation inclined shaft, which is used in the tunnel ventilation inclined shaft and is composed of concrete piers, angle steels and expansion bolts, galvanized I-beam columns and cross braces, and autoclaved aerated lightweight precast blocks. This prefabricated and assembled middle partition wall structure at least includes a bottom support structure, a steel support component and a prefabricated modular wall panel, which are specifically as follows:

[0054] The bottom support structure is a concrete pier, and its top surface is provided with a V-shaped positioning groove. The height of the concrete pier can be appropriately adjusted according to the height of the inclined shaft, and the maximum does not exceed 50 cm. The V-shaped positioning groove on the concrete pier facilitates the installation and positioning of the steel support component during the construction process. The bottom of the steel support component is embedded in the V-shaped positioning groove and fixed by concrete pouring.

[0055] The steel support component includes galvanized I-beam columns and cross braces. A galvanized I-beam column is arranged every 5 precast slabs longitudinally, ensuring the stability of the structure. The top of the steel support component is fixed to the tunnel concrete lining through L-shaped angle steels and expansion bolts. The prefabricated modular wall panel is clamped in the middle by bolts and angle steels at the top, ensuring the fixation of the precast module and the ventilation and sealing performance of the middle partition wall at the same time.

[0056] The prefabricated modular wall panel is spliced by multiple autoclaved aerated concrete precast blocks. The specification of a single precast block is 60 cm × 300 cm, and the thickness is 12 cm. Adjacent precast slabs are connected by a tongue-and-groove structure with a radius of 5 mm and an angle of 90° for concave-convex fit to form a "concave-convex groove" tongue-and-groove embedded modular structure. The tongue-and-groove joint is filled with thick anti-cracking mortar and thick resin-based sealant in sequence from inside to outside. The anti-cracking mortar is filled in the tongue-and-groove gap, and the resin-based sealant is continuously coated along the edge of the tongue-and-groove. This tongue-and-groove structure serves as a modular assembly interface, effectively reducing the along-flow resistance of the air flow and improving the ventilation efficiency.

[0057] The main material of this prefabricated middle partition wall is autoclaved aerated concrete, which is a lightweight material. This lightweight material has good strength, low self-weight, is convenient for construction, and the product modules prefabricated in the factory have good fit, high quality, and better ventilation and sealing performance.

[0058] This patent first used a steel - concrete prefabricated structure in the tunnel ventilation inclined shaft. Galvanized I - beams were used as columns and cross braces, and autoclaved aerated concrete was used as prefabricated modules. The use of the steel - concrete prefabricated structure greatly reduced the construction period and improved the construction quality while ensuring the ventilation effect.

[0059] This embodiment provides a prefabricated and assembled middle partition wall structure for a tunnel ventilation inclined shaft, which is used in the tunnel ventilation inclined shaft. The specific implementation steps and structural details are as follows:

[0060] I. Construction preparation stage

[0061] Before construction, first conduct measurement and lofting. Through professional measuring instruments, accurately determine the specific position of the middle partition wall in the ventilation inclined shaft to provide a benchmark for subsequent construction.

[0062] II. Construction of the bottom support structure

[0063] According to the measurement and lofting results, construct the concrete pier of the bottom support structure. A V - shaped positioning groove is set on the top surface of the concrete pier, which is used to accurately position the steel support component. When pouring the concrete pier, reserve the shape and size of the V - shaped positioning groove to ensure that its parameters such as angle and depth meet the design requirements. After the strength of the concrete pier reaches the design standard, embed the bottom of the steel support component composed of galvanized I - beam columns and cross braces into the V - shaped positioning groove, and firmly fix the bottom of the steel support component to the concrete pier by means of secondary concrete pouring to form a stable foundation support structure.

[0064] III. Installation of the steel support component

[0065] The steel support component includes galvanized I - beam columns and cross braces. According to the design requirements, a galvanized I - beam column is set every 5 precast slabs longitudinally. During the installation process, first accurately place the galvanized I - beam column into the V - shaped positioning groove of the concrete pier, ensure that the verticality and spacing of the columns meet the design standards, and then install the cross braces to connect the columns into a stable frame structure to enhance the overall support performance.

[0066] IV. Installation of prefabricated modular wall panels

[0067] In this embodiment, the prefabricated modular wall panels are made of autoclaved aerated concrete precast blocks. The specifications of a single precast block are 60 cm × 300 cm, and the thickness is 12 cm. The adjacent precast panels are connected through a tongue-and-groove structure with concave-convex matching. The radius of the tongue-and-groove structure is 5 mm, and the angle is 90°. During installation, the precast blocks are sequentially inserted between the I-beam columns, so that the tongues and grooves of the adjacent precast blocks are engaged with each other to ensure tight splicing. After each precast block is installed, a sealing material is promptly filled at the tongue-and-groove joint. The sealing material includes 15-mm-thick crack-resistant mortar and 1-mm-thick resin-based sealant. First, the crack-resistant mortar is filled into the tongue-and-groove gap, compacted and leveled. After the crack-resistant mortar is initially solidified, the resin-based sealant is continuously coated along the edge of the tongue-and-groove to form a complete sealing layer to prevent air leakage during ventilation.

[0068] V. Installation of the top fixing structure

[0069] The top of the steel support assembly is fixed to the tunnel concrete lining through L-shaped angle steel and expansion bolts. During installation, first, one side of the L-shaped angle steel is firmly fixed to the tunnel concrete lining through expansion bolts to ensure accurate position and firm fixation of the angle steel; then the other side is pressed against the top of the prefabricated modular wall panel and further tightened through bolts to closely connect the prefabricated wall panel with the tunnel lining, which not only ensures the stability of the middle partition wall but also enhances the sealing performance of the ventilation system.

[0070] Through the above construction steps, the construction of the prefabricated and assembled middle partition wall structure of the tunnel ventilation inclined shaft is finally completed. This structure forms a stable steel-concrete prefabricated structure through the coordinated action of the bottom support structure, the steel support assembly and the prefabricated modular wall panels. Compared with the traditional middle partition wall structure, it has significant improvements in construction efficiency, structural stability, ventilation performance, etc., and conforms to the concept of green prefabricated construction. At the same time, during the construction process, the plates can be flexibly adjusted according to the actual situation on site. If necessary, the autoclaved aerated concrete precast blocks can be replaced with other lightweight materials to meet different engineering requirements.

[0071] Compared with the prior art, the invention has the following remarkable advantages:

[0072] The use of autoclaved light aerated concrete and the prefabricated structure reduce the thickness of the middle partition wall from 30 cm to 12 cm, saving a large amount of concrete, which meets the requirement of "material saving" in green construction; the installation and construction of the plates adopt mechanical assembly, saving a large amount of manpower and material resources, which meets the requirement of "energy saving" in green construction; the factory prefabricated construction is more green and environmentally friendly than the cast-in-place concrete, so it meets the requirement of "environmental protection" in green construction. Therefore, the popularization of the prefabricated middle partition wall is coordinated with the concept of promoting green construction in China.

[0073] By optimizing the construction process, the ventilation inclined shafts of different heights can be freely adjusted by adjusting the height of the concrete piers, with a wider applicability; the design of the top angle steel and expansion bolts can speed up the construction progress and achieve a tight sealing effect; the flat "V" design structure of the bottom concrete pier can better facilitate the construction.

[0074] The autoclaved aerated lightweight concrete prefabricated assembly technology and concept have further promoted the process of prefabricated construction in the highway industry. The combination of prefabricated technology and new materials not only meets the use requirements, but also can shorten the construction period and save manpower and material resources. The use and promotion of new materials and new processes actively respond to the national call for green environmental protection and energy conservation and emission reduction, pushing the prefabricated design and construction of China's highway tunnel industry to a new height.

[0075] Although the embodiments of the invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the invention.

Claims

1. A construction method for a prefabricated and assembled middle partition wall of a tunnel ventilation inclined shaft, characterized in that: The prefabricated and assembled middle partition wall structure adopted at least includes a bottom support structure, a steel support assembly, and prefabricated modular wall panels; a positioning groove is provided on the top surface of the bottom support structure, and the bottom of the steel support assembly is embedded in the positioning groove and fixed; the prefabricated modular wall panels are spliced by a plurality of prefabricated panels, and adjacent prefabricated panels are connected by a rabbet structure with concave-convex cooperation, and a sealing material is filled at the rabbet joint; the steel support assemblies are arranged longitudinally at intervals, and the top of the steel support assemblies is fixed to the tunnel lining to form a steel-concrete composite structure for supporting the prefabricated modular wall panels; the steel support assemblies and the prefabricated modular wall panels form a steel-concrete prefabricated structure to enhance the overall structural stability; The construction method includes the following steps: S1. Measurement and positioning: Determine the installation position of the middle partition wall in the ventilation inclined shaft through measuring instruments; S2. Bottom support construction: Pour a bottom support structure with a positioning groove at the positioning position, and the height of the bottom support structure is adjusted according to the height of the inclined shaft; S3. Installation of the steel support assembly: Embed the bottom of the galvanized I-beam column into the positioning groove and fix it with concrete, and arrange multiple I-beam columns longitudinally at intervals; S4. Top fixed connection: Fix the top of the I-beam column to the tunnel lining by using L-shaped angle steel and expansion bolts, fix one side of the angle steel to the lining, and reserve a pressing space on the other side; S5. Assembly of prefabricated modular wall panels: Embed the lightweight prefabricated blocks between the I-beam columns in sequence through a mechanized hoisting device, and adjacent prefabricated blocks are connected by a rabbet structure with concave-convex cooperation; S6. Joint sealing treatment: Fill a sealing material at the rabbet joint to form a continuous sealing layer; S7. Top pressing and fixing: Adjust the reserved side of the angle steel to press the top of the prefabricated wall panel to form a steel-concrete composite structure.

2. The method according to claim 1, wherein The bottom support structure is a concrete pier, the positioning groove is a V-shaped positioning groove, and the bottom of the steel support assembly is fixed in the V-shaped positioning groove by concrete pouring.

3. The method according to claim 2, wherein The steel support assembly includes galvanized I-beam columns and cross braces, and a galvanized I-beam column is arranged every 5 prefabricated panels longitudinally at intervals.

4. The method according to claim 3, characterized in that, The top of the steel support assembly is fixed to the tunnel concrete lining by using L-shaped angle steel and expansion bolts, the top of the steel support assembly is filled with anti-cracking mortar, one side of the angle steel is fixed to the lining, and the other side presses the top of the prefabricated modular wall panel.

5. The method according to claim 1, wherein The rabbet structure is a modular assembly interface for reducing the frictional resistance along the air flow and improving the ventilation efficiency.

6. The method according to any one of claims 1 to 5, characterized in that, The sealing material includes a thick resin-based sealant, and the resin-based sealant is continuously coated along the edge of the rabbet.

7. The method according to claim 6, characterized in that The prefabricated modular wall panel is an autoclaved aerated concrete prefabricated block, the specification of a single prefabricated block is 60 cm × 300 cm, the thickness is 12 cm, and the radius of the rabbet structure is 5 mm and the angle is 90°.

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