A method for reinforcing a cave dwelling based on a corrugated steel plate-reinforced concrete combined lining

Abstract

The application provides a kiln cave reinforcing method based on a corrugated steel plate-reinforced concrete combined lining; the kiln inner base layer is cleaned before construction; steel bars are bound and planted on the kiln leg side wall and foundation, and concrete is poured to complete the reinforced concrete lining construction; the corrugated steel plate is laid on the kiln cave arch, and is fixed on the top of the reinforced concrete lining through fixed angle steel, high-strength bolts, steel backing plates and chemical anchors, meanwhile, the corrugated steel plate fixed support is closed by using grouting material, and the gap between the kiln cave arch and the corrugated steel plate is grouted by using grouting material to complete the corrugated steel plate lining construction. The application does not need to support and plant steel bars when reinforcing the arch, can shorten the construction period, and reduce the disturbance to the original structure; the combined lining is reliably connected with the original structure, and can realize the cooperative stress with the original structure; the different linings are rigidly connected, and can realize the cooperative stress between the different linings; the combined lining has good corrosion and moisture resistance, and is suitable for reinforcing the old kiln cave.

Description

Technical Field

[0001] This invention belongs to the field of civil engineering building reinforcement technology; in particular, it relates to a method for reinforcing cave dwellings based on corrugated steel plate-reinforced concrete composite lining. Background Technology

[0002] Cave dwellings are a unique type of rural residential architecture found on the Loess Plateau. They offer advantages such as warmth in winter and coolness in summer, as well as low carbon emissions and energy efficiency. They embody the agricultural culture and traditional construction techniques of Northwest China, possessing both practical value and cultural preservation value. Numerous old cave dwellings still exist in the loess regions of China. Under the influence of long-term rainwater, weathering, and temperature changes, the main structure of these cave dwellings is prone to cracking and deformation, posing serious safety hazards and urgently requiring reinforcement measures.

[0003] Existing methods for reinforcing cave dwellings have the following limitations:

[0004] (1) Reinforcement with steel mesh-concrete lining: The interior space of the cave is small, and the arch support and concrete pouring operations are difficult; drilling and planting steel bars in the arch will disturb the arch structure and affect the overall stability of the original structure; this reinforcement method has many procedures, long cycle and low construction efficiency.

[0005] (2) Steel arch support reinforcement: The curvature of the cave arch is often irregular, making it difficult for the steel arch to fit the original structure completely, resulting in gaps between the reinforced part and the original structure. This method only provides local support and has poor overall reinforcement. Due to the irregularity of the cave arch, the processing of the steel arch and the connection between components are difficult, and the construction requirements are high.

[0006] (3) Brick lining reinforcement: This method involves complicated procedures and a long construction period; the brick lining is prone to hollowing and separation from the original structure, resulting in poor synergistic stress; the mortar has weak moisture-proof performance, and its strength decays quickly in the long-term humid environment of the kiln, resulting in insufficient durability.

[0007] In summary, existing methods for reinforcing cave dwellings suffer from limitations such as complex procedures, high construction difficulty, easy disturbance to the original structure, poor stress cooperation with the original structure, and poor durability. This invention proposes a segmented composite lining reinforcement process using corrugated steel plates and reinforced concrete. The arch is reinforced with a corrugated steel plate lining, while the kiln legs are reinforced with a reinforced concrete lining. The two are effectively connected through rigid closed joints, addressing the shortcomings of existing technologies. Summary of the Invention

[0008] The purpose of this invention is to overcome the problems of existing main cave dwelling reinforcement methods, such as complicated procedures, high construction difficulty, easy disturbance to the original structure, poor synergy with the original structure, and poor durability. It provides a cave dwelling reinforcement method based on corrugated steel plate-reinforced concrete composite lining, which achieves reinforcement effects such as arch arches without formwork, arch arches without rebar installation, high durability, dense and tight reinforcement surface layer, and overall synergy in bearing the load.

[0009] This invention is achieved through the following technical solution:

[0010] This invention relates to a method for reinforcing cave dwellings based on corrugated steel plate-reinforced concrete composite lining. The method involves eight construction steps to form a segmented composite lining, with each component functioning as follows:

[0011] Step S1, Base treatment: Clean and polish the decorative layer and stains on the surface of the kiln arch and the side wall of the kiln leg. Lay out the lines and position the rebar area of ​​the side wall of the kiln leg and the foundation reinforced concrete lining, drill holes, and clean the drill holes.

[0012] Step S2, Reinforcement Arrangement of Reinforced Concrete Lining: Horizontal reinforcement bars 4, vertical reinforcement bars 5, and tie bars 6 of the reinforced concrete lining are laid on the kiln leg sidewall and foundation area. Grade A structural adhesive is injected into the drilled holes in this area, and the vertical reinforcement bars 5 and tie bars 6 are then inserted. The specifications of the horizontal reinforcement bars 4 and vertical reinforcement bars 5 are not less than [specifications missing]. Meanwhile, the ends of the horizontal reinforcement bars 4 and the tops of the vertical reinforcement bars 5 in the reinforced concrete lining are bent inwards, with a bending length of not less than 15d; the specifications of the tie bars 6 in the reinforced concrete lining are not less than... Following the principle of alternating between two pulls, a plum blossom pattern is used for the arrangement;

[0013] Step S3, concrete pouring for reinforced concrete lining: pour concrete 3 for the kiln leg sidewall from the top surface of the kiln leg foundation to 50mm below the top elevation of the kiln leg, with a pouring thickness of not less than 200mm and a concrete grade of not less than C30.

[0014] Step S4, Installation of composite lining connection node pad plate: A steel pad plate 11 is installed along the entire length of the top of the reinforced concrete lining and fixed by pad plate anchor bolts 12; the thickness of the steel pad plate 11 is not less than 20mm, and the width is consistent with the thickness of the reinforced concrete lining; the specification of the pad plate anchor bolt 12 is not less than M12@300.

[0015] Step S5, Corrugated steel plate lining and installation: Corrugated steel plate 1 is laid out in accordance with the curvature of the cave arch. The rib direction of corrugated steel plate 1 should be consistent with the curvature direction of the arch. The ends of corrugated steel plate 1 are welded to fixed angle steel 8 and fixedly connected by high-strength bolts 9. The specifications of corrugated steel plate 1 are not less than 200×55×6, the specifications of fixed angle steel 8 are not less than L100×10, and the specifications of high-strength bolts 9 are not less than M20@300.

[0016] Step S6, fixing the corrugated steel plate lining support: weld the flange of the fixing angle steel 8 to the steel pad 11, and anchor the fixing angle steel 8 to the top of the reinforced concrete lining with chemical anchor bolts 10. The specification of the chemical anchor bolts 10 is not less than M20@300.

[0017] Step S7, sealing of the joint of the composite lining: pour sealing grout 7 in a height range of not less than 100mm from the top surface of the reinforced concrete lining to the top elevation of the kiln leg. The strength grade of sealing grout 7 shall not be less than C45.

[0018] Step S8, Corrugated steel plate lining grouting construction: The arch grouting material 2 is densely injected into the gap between the kiln arch and the corrugated steel plate 1. The strength grade of the arch grouting material 2 is not less than C45. At this point, the combined lining reinforcement is completed, and the whole system forms a segmented collaborative force-bearing system of arch lining and kiln leg lining. Rigid closed nodes are used to connect different parts of the lining to ensure effective force transmission between them and the durability of the connection nodes.

[0019] Preferably, the reinforcement system used in this reinforcement method includes corrugated steel plate 1, arch grouting material 2, kiln leg sidewall concrete 3, reinforced concrete lining horizontal reinforcement 4, reinforced concrete lining vertical reinforcement 5, reinforced concrete lining tie reinforcement 6, sealing grouting material 7, fixing angle steel 8, high-strength bolts 9, chemical anchors 10, steel pads 11, and pad anchors 12.

[0020] Preferably, the outer surface of the corrugated steel plate 1 is pre-coated with an anti-corrosion and fireproof coating to improve the durability of the reinforced lining of the arch section in terms of moisture-proof, anti-corrosion, and fireproof properties.

[0021] Preferably, the sealing grout 7, fixing angle steel 8, high-strength bolt 9, chemical anchor 10, and steel pad 1 constitute a rigid closed connection node.

[0022] Preferably, the rigid closed nodes between the different lining sections can effectively transmit forces to ensure coordinated force distribution.

[0023] Preferably, during the construction of the corrugated steel plate lining, it is not necessary to erect a support formwork within the arch area. The corrugated steel plate 1 can be used for support and subsequent arch pouring work by relying on its own rigidity. This eliminates the need for the arch reinforcement formwork process and reduces the construction difficulty in the narrow space of the cave.

[0024] Preferably, the reinforcement construction process of the arch area of ​​the cave dwelling does not involve drilling and rebar installation. Only the side walls and foundation of the cave legs are drilled and rebar installed, which greatly reduces the disturbance to the existing structure of the cave dwelling.

[0025] Preferably, the corrugated steel plate 1 is processed on-site according to the actual curvature of the cave arch, and the arch grouting material 2 is poured into the gap between the corrugated steel plate 1 and the cave arch to achieve a tight fit and mutual adhesion between the reinforcement layer and the cave arch.

[0026] Preferably, the sealing grout 7 seals the connection nodes between different lining sections, isolates the kiln from moisture and water vapor, prevents corrosion of the connecting components, and effectively improves the durability of the connection nodes.

[0027] Preferably, the reinforcement system used in this reinforcement method is divided into two sections that work together to bear the load: an arch corrugated steel plate lining section and a kiln leg reinforced concrete lining section. The arch is reinforced with a corrugated steel plate lining surface layer formed by corrugated steel plate 1 and arch grouting material 2, and the kiln leg is reinforced with a reinforced concrete lining surface layer. The two are effectively connected by a rigid closed node to improve the overall stability of the kiln structure.

[0028] The present invention has the following advantages:

[0029] (1) The arch section is reinforced with corrugated steel plate lining, which eliminates the need for formwork within the arch area, making it suitable for the narrow working space of the cave dwelling, greatly reducing construction difficulty and shortening the construction period;

[0030] (2) No drilling and rebar installation are carried out during the reinforcement process of the arch area of ​​the cave dwelling. Only local rebar installation is carried out on the kiln legs to avoid disturbing the original arch structure, reduce the impact on the overall stability of the original structure, and ensure the safety of the original structure.

[0031] (3) Corrugated steel plates can be processed according to the actual curvature of the cave arch, adapting to irregular curvature arches, and filling the gaps of the arch grouting material to ensure that the reinforcement layer and the cave arch are tightly bonded and have excellent synergistic stress performance.

[0032] (4) The corrugated steel plate of the arch has a self-contained anti-corrosion and fireproof coating. The reinforced concrete of the kiln leg has excellent water-proof, moisture-proof and fireproof performance. The connection node between the combined lining is a closed node, and the overall reinforcement effect is durable.

[0033] (5) Rigid connections are adopted between different reinforced parts, which can effectively transfer forces; the connection between the reinforced surface layer and the original structure is reliable, which effectively enhances the synergistic force-bearing effect between them, and the overall stability of the cave dwelling structure is significantly improved.

[0034] (6) The components are standardized, the process is simplified, the construction quality is easy to control, and it is suitable for the reinforcement of various loess cave dwellings and stone cave dwellings. Attached Figure Description

[0035] Figure 1 Here is a cross-sectional view of the reinforcement method:

[0036] Figure 2 This is a schematic diagram of the composite lining connection method;

[0037] Figure 3 This is a schematic diagram of the composite lining support construction method;

[0038] Figure 4 This is a plan view of the reinforced concrete lining construction method for the kiln leg sidewalls;

[0039] Figure 5 This is a schematic diagram of the arrangement of tie bars in the reinforced concrete lining of the kiln leg sidewall;

[0040] Attached diagram labels: 1. Corrugated steel plate, 2. Arch grouting material, 3. Kiln leg sidewall concrete, 4. Horizontal reinforcement of reinforced concrete lining, 5. Vertical reinforcement of reinforced concrete lining, 6. Tie bar of reinforced concrete lining, 7. Sealing grouting material, 8. Fixing angle steel, 9. High-strength bolt, 10. Chemical anchor, 11. Steel pad, 12. Pad anchor. Detailed Implementation

[0041] The present invention will now be described in detail with reference to specific embodiments. It should be noted that the following embodiments are merely further illustrations of the present invention, but the scope of protection of the present invention is not limited to the following embodiments.

[0042] Example 1

[0043] This embodiment is applied to the reinforcement of earthen cave dwellings on the Loess Plateau. The cave dwelling has an arch span of 3.2m and a leg height of 2.8m. The interior space is narrow, the original arch has minor cracks, and the soil on the side walls of the leg has weathered and peeled off. The combined lining reinforcement technology of this invention is used for construction. The entire construction process is shown in Figure 1. Figure 5 The specific steps are as follows:

[0044] Step 1, base treatment, see Figure 1 As shown (fully illustrating the layout of corrugated steel plate 1, arch grouting material 2, kiln leg sidewall concrete 3, etc.):

[0045] Manual grinding is used to remove decorative plaster, loose soil, and weathered debris from the surface of the kiln arches, kiln leg sidewalls, and foundation; according to Figure 3 Schematic diagram of composite lining support construction Figure 4 Plan view of reinforced concrete lining construction method for kiln leg sidewalls Figure 5 A schematic diagram of the arrangement of tie bars for the reinforced concrete lining of the kiln leg sidewall is used to mark the locations of the rebar holes; water drills are used to drill holes matching the diameter of the rebars, and high-pressure air is used to clean the holes after drilling to remove dust and ensure the bonding effect of the rebars.

[0046] Step 2, Reinforcement arrangement for reinforced concrete lining, see... Figure 1, Figure 3 , Figure 4 , Figure 5 (Showing the arrangement of 6 rows of tie bars in the reinforced concrete lining); In Figure 3 , Figure 4 In the reinforced concrete lining, the anchoring depth of the tie bars 6 shall not be less than 15 times the diameter of the steel bar (15d) and 120mm. Figure 3 The anchoring depth of the vertical reinforcement bar 5 in the reinforced concrete shall not be less than 20 times the diameter of the reinforcement bar (20d).

[0047] Inject Class A epoxy structural adhesive into the anchor holes; reinforce the concrete lining with horizontal reinforcement 4, vertical reinforcement 5, and tie reinforcement 6; combined with... Figure 1 , Figure 3 , Figure 4 , Figure 5 Layout requirements: 5 vertical reinforcement bars for reinforced concrete lining shall be adopted. Threaded steel bars, spaced 200mm apart; 4 horizontal reinforcing bars for reinforced concrete lining. Threaded steel bars are arranged at 200mm intervals; the ends of the horizontal reinforcement bars 4 and the top of the vertical reinforcement bars 5 in the reinforced concrete lining are bent inwards, with a bending length of 15d; the tie bars 6 of the reinforced concrete lining are... Round steel bars, spaced 400mm, according to Figure 5 The requirements are as follows: reinforcement bars should be arranged in a staggered, quincunx pattern, following the principle of alternating reinforcement and reinforcement spacing; after binding, a complete reinforcement cage should be formed, and the entire reinforcement cage should be embedded inside the concrete 3 of the kiln leg sidewall. Figure 1 As shown.

[0048] Step 3, pouring reinforced concrete lining (see...) Figure 1 , Figure 3 , Figure 4 )

[0049] Erect the outer formwork, pour concrete 3 for the kiln leg sidewall, the pouring range is from the top surface of the kiln leg foundation to 50mm below the top elevation of the kiln leg, the pouring thickness is uniformly 200mm, and C30 commercial concrete is used; pour and vibrate to compact, cure for 28 days to reach strength; after molding, a reinforced concrete lining is formed.

[0050] Step 4, Installation of the joint plate for the combined lining (see...) Figure 1 , Figure 2 )

[0051] After the concrete reaches its strength, steel pads 11 are installed along the entire length of the reinforced concrete lining. The thickness of the steel pads 11 is 20mm, and the width matches the thickness of the reinforced concrete lining (200mm). They are fixed using pad anchors 12, which are M12 in size and evenly spaced 300mm apart along the entire length. The combined structure of the steel pads 11 and the pad anchors 12 is shown in [details omitted]. Figure 2.

[0052] Step 5, Corrugated steel plate lining and installation (see...) Figure 1 , Figure 2 )

[0053] A corrugated steel plate 1 with specifications of 200×55×6 was selected, and the outer surface of the steel plate was pre-coated with an anti-corrosion and fireproof coating. The corrugated steel plate 1 was fabricated on-site according to the measured arch arc of the cave dwelling and laid tightly along the arch. The ends of the corrugated steel plate 1 were fully welded to L100×10 fixed angle steel 8 and fixed with M20 high-strength bolts 9, with a spacing of 300mm between the bolts. No arch reinforcement formwork was required throughout the process; the support relied on the inherent rigidity of the corrugated steel plate 1. The spatial positions of the corrugated steel plate 1, fixed angle steel 8, and high-strength bolts 9 are shown in [details omitted]. Figure 1 , Figure 2 .

[0054] Step 6: Fix the corrugated steel plate lining support, see... Figure 2 (The assembly structure of the fixed angle steel 8, chemical anchor bolt 10, and steel pad 11 is shown.)

[0055] The flange of the fixed angle steel 8 is fully welded to the steel base plate 11. M20 chemical anchors 10 are used to penetrate the steel base plate 11 and anchor to the top of the reinforced concrete lining. The chemical anchors 10 are arranged at 300mm intervals. For details of the joint construction of the fixed angle steel 8, chemical anchors 10, and steel base plate 11, please refer to [link to details]. Figure 2 Combined lining connection method.

[0056] Step 7, sealing the joints of the composite lining (see...) Figure 1 profile, Figure 2 (Connecting nodes) Figure 2 In the process, the grouting range of the sealing grouting material shall be no less than 100mm from the top surface of the reinforced concrete lining to the top elevation of the kiln leg.

[0057] Erect the joint sealing formwork. Pour C45 strength sealing grout 7 into the 100mm height range from the top surface of the reinforced concrete lining to the top of the kiln leg. The sealing grout 7 completely encapsulates and fixes the angle steel 8, high-strength bolts 9, chemical anchors 10, and steel pads 11. Once fully strengthened, a rigid sealed joint is formed, isolating it from humid air and preventing corrosion of the joint components. See [link to complete rigid sealed joint structure] for details. Figure 2 .

[0058] Step 8, Construction of grouting material for corrugated steel plate lining (see...) Figure 1 , Figure 2 )

[0059] Grouting pipes are installed along the side of the gap between the corrugated steel plate 1 and the arch, and C45 arch grout 2 is injected into the gap between the corrugated steel plate 1 and the arch until it is completely compacted. The compacted arch grout 2 completely eliminates the gap between the corrugated steel plate 1 and the arch. The positional relationship between the corrugated steel plate 1 and the arch grout 2 is as follows: Figure 1 Reinforcement cross-section diagram Figure 2 As shown.

[0060] Key performance characteristics of various grouting materials and concrete supplements involved in the embodiments of this invention:

[0061] (1) The arch grouting material and the sealing grouting material are non-shrink high-performance grouting materials;

[0062] (2) The anti-corrosion coating of the corrugated steel plate is an epoxy zinc-rich anti-corrosion layer, and the fireproof coating is a thin intumescent fireproof coating;

[0063] (3) Grade A structural adhesive is epoxy anchoring adhesive.

[0064] Overall stress description after construction (see) Figures 1-5 )

[0065] Depend on Figure 1 It can be seen that the reinforcement system consists of a top arched reinforcement layer (corrugated steel plate 1 + arch grouting material 2) and a side vertical reinforcement layer (kiln leg sidewall concrete 3 + reinforced concrete lining horizontal reinforcement 4 + reinforced concrete lining vertical reinforcement 5 + reinforced concrete lining tie reinforcement 6); the two-layer structure is connected by... Figure 2 Rigid closed nodes are used for connection; the reinforcement system is achieved through Figure 1 Material bonding, Figure 3 Bottom support, Figure 4 and Figure 5 The steel reinforcement is connected to the original structure of the kiln. The corrugated steel plate 1 has a built-in anti-corrosion and fireproof coating, and all steel connectors are wrapped inside the sealed grout 7, which greatly improves the overall moisture-proof, anti-corrosion, fireproof and durability performance of the structure; there is no rebar installation process for the arch, only local rebar installation on the kiln legs, which protects the original structure of the kiln to the greatest extent.

[0066] Compared with existing steel mesh-concrete lining reinforcement, steel arch support reinforcement, and brick masonry lining reinforcement, which have drawbacks such as complicated procedures, high construction difficulty, easy disturbance to the original structure, poor stress cooperation with the original structure, and poor durability, the solution involved in this method has obvious advantages.

[0067] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A method for reinforcing cave dwellings based on corrugated steel plate-reinforced concrete composite lining, characterized in that, The construction steps include the following: Step S1, Base treatment: Clean and polish the decorative layer and stains on the surface of the kiln arch and the side wall of the kiln leg. Lay out the lines and position the rebar area of ​​the side wall of the kiln leg and the foundation reinforced concrete lining, drill holes, and clean the drill holes. Step S2, Reinforcement Arrangement of Reinforced Concrete Lining: Horizontal reinforcement bars (4), vertical reinforcement bars (5), and tie bars (6) of the reinforced concrete lining are arranged on the sidewalls and foundation area of ​​the kiln leg. Grade A structural adhesive is injected into the boreholes in this area, and the vertical reinforcement bars (5) and tie bars (6) are then inserted. The specifications of the horizontal reinforcement bars (4) and vertical reinforcement bars (5) are not less than [specifications missing]. Meanwhile, the ends of the horizontal reinforcement bars (4) and the top of the vertical reinforcement bars (5) of the reinforced concrete lining are bent inward, with a bending length of not less than 15d; the specifications of the tie bars (6) of the reinforced concrete lining are not less than Following the principle of alternating between two pulls, a plum blossom pattern is used for the arrangement; Step S3, concrete pouring for reinforced concrete lining: pour concrete for the side wall of the kiln leg from the top surface of the kiln leg foundation to a range of 50mm below the top elevation of the kiln leg (3), with a pouring thickness of not less than 200mm and a concrete grade of not less than C30. Step S4, Installation of composite lining connection node pad plate: Steel pad plate (11) is laid along the entire length of the top of the reinforced concrete lining and fixed by pad plate anchor bolts (12); the thickness of the steel pad plate (11) is not less than 20mm and the width is consistent with the thickness of the reinforced concrete lining; the specification of the pad plate anchor bolt (12) is not less than M12@300. Step S5, installation of corrugated steel plate lining: Corrugated steel plate (1) is laid out in accordance with the curvature of the cave arch. The direction of the ribs of the corrugated steel plate (1) should be consistent with the direction of the curvature of the arch. The ends of the corrugated steel plate (1) are welded to the fixed angle steel (8) and fixedly connected by high-strength bolts (9). The specifications of the corrugated steel plate (1) are not less than 200×55×6, the specifications of the fixed angle steel (8) are not less than L100×10, and the specifications of the high-strength bolts (9) are not less than M20@300. Step S6, fixing the corrugated steel plate lining support: weld the flange of the fixing angle steel (8) to the steel pad (11), and anchor the fixing angle steel (8) to the top of the reinforced concrete lining with chemical anchor bolts (10). The specifications of the chemical anchor bolts (10) are not less than M20@300. Step S7, sealing of the joint of the composite lining: pour sealing grout (7) in a height range of not less than 100mm from the top surface of the reinforced concrete lining to the top elevation of the kiln leg. The strength grade of the sealing grout (7) is not less than C45. Step S8, construction of corrugated steel plate lining grout: densely inject arch grout (2) into the gap between the kiln arch and the corrugated steel plate (1). The strength grade of the arch grout (2) is not less than C45. The combined lining reinforcement is completed, and the whole forms a segmented collaborative force system of arch lining + kiln leg lining. Rigid closed nodes are used to connect different parts of the lining to ensure effective force transmission and durability of the connection nodes.

2. The method for reinforcing cave dwellings based on corrugated steel plate-reinforced concrete composite lining as described in claim 1, characterized in that, The reinforcement system used in this reinforcement method includes corrugated steel plate (1), arch grout (2), kiln leg sidewall concrete (3), reinforced concrete lining horizontal reinforcement (4), reinforced concrete lining vertical reinforcement (5), reinforced concrete lining tie reinforcement (6), sealing grout (7), fixing angle steel (8), high-strength bolts (9), chemical anchors (10), steel pads (11), and pad anchors (12); the above components work together to achieve segmented and coordinated reinforcement of the kiln.

3. The method for reinforcing cave dwellings based on corrugated steel plate-reinforced concrete composite lining as described in claim 1, characterized in that, The outer surface of the corrugated steel plate (1) is pre-coated with an anti-corrosion and fireproof coating.

4. The method for reinforcing cave dwellings based on corrugated steel plate-reinforced concrete composite lining as described in claim 1, characterized in that, The sealing grout (7), fixing angle steel (8), high-strength bolts (9), chemical anchors (10), and steel pads (11) work together to form a rigid closed connection node.

5. The method for reinforcing cave dwellings based on corrugated steel plate-reinforced concrete composite lining as described in claim 1, characterized in that, The rigid closed nodes between the different lining sections can effectively transmit forces to ensure coordinated force distribution.

6. The method for reinforcing cave dwellings based on corrugated steel plate-reinforced concrete composite lining as described in claim 1, characterized in that, During the construction of corrugated steel plate lining, there is no need to set up support templates within the arch area. The corrugated steel plate (1) itself provides support and subsequent arch grouting work is carried out.

7. The method for reinforcing cave dwellings based on corrugated steel plate-reinforced concrete composite lining as described in claim 1, characterized in that, The reinforcement construction process of the arch area of ​​the cave dwelling does not involve drilling and rebar installation; only the side walls and foundation of the cave legs are drilled and rebar installed.

8. The method for reinforcing cave dwellings based on corrugated steel plate-reinforced concrete composite lining as described in claim 1, characterized in that, The corrugated steel plate (1) is processed on-site according to the actual curvature of the cave arch. The arch grouting material (2) is poured into the gap between the corrugated steel plate (1) and the cave arch to achieve a tight fit and mutual bonding between the reinforcement layer and the cave arch.

9. The method for reinforcing cave dwellings based on corrugated steel plate-reinforced concrete composite lining as described in claim 1, characterized in that, The sealing grout (7) seals the connection nodes between different parts of the lining, isolates the kiln from moisture and water vapor, prevents corrosion of the connecting components, and effectively improves the durability of the connection nodes.

10. The method for reinforcing cave dwellings based on corrugated steel plate-reinforced concrete composite lining as described in claim 1, characterized in that, The reinforcement system used in this reinforcement method is divided into two sections that work together to bear the load: the arch corrugated steel plate lining section and the kiln leg reinforced concrete lining section. The arch is reinforced with a corrugated steel plate lining (1) and arch grouting material (2), and the kiln leg is reinforced with a reinforced concrete lining. The two are effectively connected by a rigid closed node to improve the overall stability of the kiln structure.

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