Steel-concrete combined type tunnel portal structure of metro connecting channel and construction method

Abstract

The invention relates to the field of metro construction, in particular to a metro connecting channel steel-concrete combined type tunnel portal structure and a construction method. Comprising a main tunnel segment used for forming a main tunnel lining structure; the connecting channel duct piece is connected with the main tunnel duct piece and used for forming a connecting channel lining structure; the steel sleeve is arranged at the joint of the main tunnel segment and the connecting channel segment and used for forming an initial structure of the connecting channel tunnel portal structure; the profile steel supporting structure is shaped like a Chinese character'jing 'and is arranged on the steel sleeve and the connecting channel lining structure; and the steel plate structure is welded among the supporting structure, the steel sleeve and the connecting channel lining structure, and is used for forming a tunnel portal in the middle of the supporting structure and separating a grouting cabin among the tunnel portal, the steel sleeve and the connecting channel duct piece. The construction efficiency is remarkably improved, the structural integrity and stability are enhanced, the waterproof and anti-corrosion performance is improved, and the construction cost and risk are reduced.

Description

Technical Field

[0001] The invention relates to the field of subway construction, and in particular to a subway communication channel steel-concrete combined tunnel door structure and a construction method. Background Art

[0002] The subway liaison passage is an indispensable part of subway construction, mainly used for pipeline connection and personnel evacuation. In emergency situations such as fire, the liaison passage can be used as an escape passage and fire operation passage, which is of great significance to ensure the safety of subway operations. According to my country's current standards, when the continuous length of two single-track section tunnels is greater than 600 meters, a liaison passage should be set up, and two-way opening Class A fire doors should be set up at both ends of the passage.

[0003] At present, the construction methods of subway communication channels mainly include mining method and mechanical method. Compared with the mining method, the mechanical method (such as shield method and pipe jacking method) has the advantages of high construction efficiency, good safety and controllable quality. However, the traditional communication channel portal structure mostly adopts cast-in-place reinforced concrete, and the construction process requires complex processes such as cutting sleeves, planting steel bars, supporting formwork, grouting, and demolding. These processes not only slow down the construction progress, but also lead to poor integrity of the portal structure.

[0004] In the prior art, the patent document with application number 202110869902.9 discloses a method for constructing a subway tunnel connecting channel, which prevents landslides and leakage during construction by forming a frozen layer. Although this method solves the construction problem in a wet and soft soil environment, it still has disadvantages such as a long construction period and complicated procedures. In addition, although the mechanical method of connecting channel construction is more efficient, the prior art still has problems such as high construction equipment cost, long construction period, and great impact on the main line tunnel construction.

[0005] In order to solve the above problems, the present invention proposes a subway communication channel steel-concrete combined tunnel door structure and a construction method. Summary of the invention

[0006] The purpose of the present invention is to provide a subway communication channel steel-concrete combined tunnel door structure and construction method to solve the problems of low construction efficiency, poor structural integrity and long construction period of the communication channel tunnel door in the prior art.

[0007] To achieve the above purpose, the following technical solution is adopted.

[0008] A steel-concrete combined tunnel door structure for a subway communication channel, comprising:

[0009] Main tunnel segments, used to form the main tunnel lining structure;

[0010] A communication channel segment connected to the main tunnel segment to form a communication channel lining structure;

[0011] A steel sleeve is provided at the connection between the main tunnel segment and the communication channel segment to form the initial structure of the communication channel portal structure;

[0012] A steel support structure, which is in a tic-tac-toe shape and is arranged on the steel sleeve and the communication channel lining structure;

[0013] The steel plate structure is welded between the supporting structure, the steel sleeve and the connecting channel lining structure, and is used to form a tunnel door in the middle of the supporting structure and to separate a grouting chamber between the tunnel door, the steel sleeve and the connecting channel segment, and the grouting chamber is used to fill concrete.

[0014] Optionally, the steel support structure includes: a first front steel support, a second front steel support, a first rear steel support, a second rear steel support, a first front steel cross brace, a second front steel cross brace, a first rear steel cross brace and a second rear steel cross brace, wherein the first front steel support and the second front steel support are respectively vertically spaced inside the edge of the steel sleeve close to the main tunnel side; the first rear steel support and the second rear steel support are respectively vertically spaced inside the communication channel lining structure; the first front steel cross brace and the second front steel cross brace are respectively transversely embedded in the first front The upper and lower ends of the steel support and the second front steel support, and the two ends of the first front steel cross brace and the second front steel cross brace are respectively connected to the inner side of the steel sleeve; the first rear steel cross brace and the second rear steel cross brace are respectively transversely embedded in the upper and lower ends of the first rear steel support and the second rear steel support, and the two ends of the first rear steel cross brace and the second rear steel cross brace are respectively connected to the connecting channel lining structure; the first front steel support and the first rear steel support are connected by a first connecting steel; the second front steel support and the second rear steel support are connected by a second connecting steel.

[0015] Optionally, the first front steel support is connected to the first end of the first front transverse support in the middle, and the second end of the first front transverse support is connected to the steel sleeve, the second front steel support is connected to the first end of the second front transverse support in the middle, and the second end of the second front transverse support is connected to the steel sleeve; the first rear steel support is connected to the first end of the first rear transverse support in the middle, and the second end of the first rear transverse support is connected to the connecting channel lining structure, the second rear steel support is connected to the first end of the second rear transverse support in the middle, and the second end of the second rear transverse support is connected to the connecting channel lining structure.

[0016] Optionally, the steel plate structure includes a portal steel plate and a bulkhead steel plate, and the portal steel plates include multiple groups, which are arranged between the first front steel support and the first rear steel support, and also between the second front steel support and the second rear steel support; they are also arranged between the first front steel cross brace and the first rear steel cross brace, and also between the second front steel cross brace and the second rear steel cross brace, and the portal steel plates form a portal structure; the bulkhead steel plates include multiple groups, which are respectively arranged between the first front transverse support and the first rear transverse support, between the second front transverse support and the second rear transverse support, and in the area surrounding the portal structure on the front and rear end faces of the steel support structure.

[0017] Optionally, a waterproof layer is also included, which is arranged on the outside and connection of the steel plate structure and filled with polyurethane waterproof material to improve the waterproof performance of the structure.

[0018] Optionally, a grouting system is further included, including grouting holes, which are arranged on the bulkhead steel plates around the portal structure on the front end face of the steel support structure, and are used to inject self-compacting concrete for overall reinforcement into the grouting compartment.

[0019] Optionally, the steel support structure and the steel plate structure are both connected by welding.

[0020] Optionally, both ends of the first front steel support and the second front steel support respectively support the main tunnel lining structure.

[0021] A method for constructing a steel-concrete combined tunnel door for a subway communication channel comprises the following steps:

[0022] The tunneling of the connecting channel and the assembly of the connecting channel segments are completed by using a shield machine, and grouting reinforcement is carried out behind the segment wall until the slurry solidifies and reaches the designed strength;

[0023] Separate the shield negative ring and weld the main tunnel segment and the connecting channel segment with steel sleeves to form the initial structure of the portal;

[0024] Installing a steel support structure inside the edge of the steel sleeve and on the lining structure of the communication channel, wherein the steel support structure is arranged in a tic-tac-toe shape;

[0025] Welding a steel plate structure on the steel support structure, wherein the steel plate structure includes a portal steel plate and a bulkhead steel plate, wherein the portal steel plate is used to form a portal structure, and the bulkhead steel plate is used to separate a grouting chamber, and the steel plate structure is connected to the steel support structure, the steel sleeve, and the communication channel lining structure by welding to form an integrated structure;

[0026] Self-compacting concrete is injected into the grouting chamber through the grouting holes arranged on the bulkhead steel plate around the portal structure at the front end of the steel support structure until the grouting pressure reaches a preset value, and then the grouting holes are sealed to complete the filling of the grouting chamber;

[0027] Coat the outer side and joints of the steel plate structure with polyurethane waterproof material to form a waterproof layer;

[0028] Carry out quality inspection on the portal structure after construction is completed to ensure that the integrity, stability and waterproof performance of the structure meet the design requirements.

[0029] Optionally, after the filling of the grouting chamber is completed, anti-corrosion paint is also applied on the outer side of the steel plate structure.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention adopts prefabricated steel sleeves and steel support structures, avoiding the complicated sleeve cutting, rebar planting, formwork, pouring and demolding processes in traditional cast-in-place reinforced concrete structures. The steel support and steel plate structure are quickly connected through welding technology, which greatly shortens the construction period and improves construction efficiency. The steel-concrete composite structure is integrated through welding, which enhances the integrity and rigidity of the portal structure and can better withstand the load during the construction and use stages. The design of the grouting chamber and the filling of self-compacting concrete further improve the stability and deformation resistance of the structure.

[0032] The use of prefabricated steel sleeves and steel support structures reduces on-site cutting and welding operations and reduces construction risks. Grouting reinforcement and the setting of waterproof layers effectively prevent leakage and deformation and improve safety during construction.

[0033] The steel-concrete composite structure reduces wet work on site, reduces material waste and labor costs. The shortened construction period further reduces project costs and improves economic benefits. The outer side and joints of the steel plate structure are coated with polyurethane waterproof material to form a reliable waterproof layer, effectively prevent leakage, and extend the service life of the structure.

[0034] The structure and construction method of the present invention are applicable to various geological conditions and construction environments and have good adaptability. The steel sleeve and the steel support structure can be adjusted according to specific engineering requirements to meet the design requirements of different communication channels.

[0035] The modular design of the steel-concrete composite structure facilitates construction operations and subsequent maintenance.

[0036] The setting of grouting holes and grouting system simplifies the construction process and provides convenience for subsequent reinforcement.

[0037] The present invention effectively solves the problems of low construction efficiency, poor structural integrity, high construction risk, high cost and insufficient waterproof performance existing in the prior art through innovative structural design and construction methods. It has significant economic and social benefits and is of great promotion value to the construction of subway connecting passages. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is an overall schematic diagram of an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the communication channel door structure of an embodiment of the present invention;

[0040] Figure 3 It is a layout diagram of the steel support structure according to an embodiment of the present invention;

[0041] Figure 4 A steel plate structure layout diagram of an embodiment of the present invention;

[0042] Figure 5 This is a diagram showing the layout of the steel plates in the inner compartment of the communication channel according to an embodiment of the present invention;

[0043] Figure 6 It is a schematic diagram of the arrangement of steel plates and grouting holes in the side compartment of the main tunnel according to an embodiment of the present invention;

[0044] Among them: 1. Main tunnel segment; 2. Communication channel segment; 3. Communication channel portal structure; 4. Steel sleeve; 5. Steel support structure; 501. First front steel support; 502. Second front steel support; 503. First rear steel support; 504. Second rear steel support; 505. First front steel cross brace; 506. Second front steel cross brace; 507. First rear steel cross brace; 508. Second rear steel cross brace; 509. First front transverse support; 510. Second front transverse support; 511. First rear transverse support; 512. Second rear transverse support; 513. First connecting steel; 514. Second connecting steel; 6. Steel plate structure; 601. Portal steel plate; 602. Bulkhead steel plate; 603. Grouting hole. DETAILED DESCRIPTION

[0045] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0046] The following detailed description is an exemplary description, which is intended to provide further detailed description of the present invention. Unless otherwise specified, all technical terms used in the present invention have the same meaning as those generally understood by those skilled in the art to which the present application belongs. The terms used in the present invention are only for describing specific embodiments, and are not intended to limit exemplary embodiments according to the present invention.

[0047] Example 1

[0048] like Figure 1-Figure 6 As shown, the present invention relates to a steel-concrete combined tunnel structure for a subway communication channel, and its specific implementation is as follows:

[0049] The subway connecting channel steel-concrete combined portal structure mainly includes a main tunnel segment 1, a connecting channel segment 2, a steel sleeve 4, a steel support structure 5 and a steel plate structure 6.

[0050] The main tunnel segment 1 is used to form the lining structure of the main tunnel, which is the main component of the subway tunnel and plays the role of supporting and protecting the tunnel. The main tunnel segment 1 is usually composed of prefabricated concrete segments, which are assembled to form a stable tunnel lining.

[0051] The communication channel segment 2 is connected to the main tunnel segment 1 to form the lining structure of the communication channel. The communication channel is an important part connecting two subway tunnels and is used for personnel evacuation, pipeline connection, firefighting and other functions. The communication channel segment 2 is also composed of prefabricated concrete segments, which are assembled to form the lining structure of the communication channel and connected to the main tunnel segment 1 to ensure the connectivity between the communication channel and the main tunnel.

[0052] The steel sleeve 4 is arranged at the connection between the main tunnel segment 1 and the communication channel segment 2 to form the initial structure of the communication channel portal structure 3. The steel sleeve 4 is a prefabricated steel structure with high strength and stability. During the construction process, the steel sleeve 4 is installed at the connection between the main tunnel segment 1 and the communication channel segment 2 to play a role of temporary support and positioning, providing a basis for subsequent construction. The setting of the steel sleeve 4 can effectively reduce deformation during the construction process and improve the safety and reliability of the construction.

[0053] The steel support structure 5 is in a tic-tac-toe shape and is arranged on the steel sleeve 4 and the lining structure of the communication channel. The steel support structure 5 is composed of multiple steel sections, including vertical steel sections and transverse steel sections. The vertical steel sections are arranged at intervals inside the edge of the steel sleeve 4 close to the main tunnel side and inside the lining structure of the communication channel to provide vertical support force. The transverse steel sections are embedded in the upper and lower ends of the vertical steel sections and connected to the inner side of the steel sleeve 4 or the lining structure of the communication channel to form a stable tic-tac-toe support frame. The setting of the steel support structure 5 can enhance the stability and integrity of the portal structure and effectively withstand the load effects during the construction and use stages.

[0054] The steel plate structure 6 is welded between the steel support structure 5, the steel sleeve 4 and the communication channel lining structure. The steel plate structure 6 includes a portal steel plate 601 and a bulkhead steel plate 602. The portal steel plate 601 is arranged in the middle area of ​​the steel support structure 5 to form a portal structure to ensure the passage function of the communication channel. The bulkhead steel plate 602 is arranged between the portal and the steel sleeve 4 and the communication channel segment 2 to separate the grouting chamber. The grouting chamber can be used to fill concrete to further enhance the stability and integrity of the structure. The steel plate structure 6 is connected to the steel support structure 5, the steel sleeve 4 and the communication channel lining structure by welding to form an integrated structure to improve the integrity and rigidity of the structure.

[0055] In the specific construction process, the shield machine is first used to complete the excavation of the communication channel and the assembly of the communication channel segment 2, and grouting reinforcement is performed behind the segment wall until the slurry solidifies and reaches the designed strength. Subsequently, the shield negative ring is separated, the steel sleeve 4 reserved in the communication channel is removed, and the main tunnel segment 1 and the communication channel segment 2 are welded with an arc steel plate to form the initial structure of the tunnel portal. Next, the steel support structure 5 is installed inside the edge of the steel sleeve 4 and on the lining structure of the communication channel, and the steel plate structure 6 is welded. The welding of the steel plate structure 6 should ensure the firmness and reliability of the connection to form a stable tunnel portal structure and grouting chamber. After that, self-compacting concrete is injected into the grouting chamber through the grouting hole 603 on the compartment steel plate 602 around the tunnel portal structure on the front face of the steel support structure 5 until the grouting pressure reaches the preset value, and then the grouting hole 603 is blocked to complete the filling of the grouting chamber. Finally, polyurethane waterproof material is coated on the outside and joints of the steel plate structure 6 to form a waterproof layer to improve the waterproof performance of the structure.

[0056] The subway communication channel steel-concrete combined tunnel door structure of the present invention effectively improves construction efficiency, enhances the integrity and stability of the structure, reduces construction risks, and has significant economic and social benefits through reasonable design and construction methods.

[0057] Example 2

[0058] As a preferred example, in the steel-concrete combined tunnel structure of the subway communication channel of the present invention, the steel support structure 5 is specifically as follows:

[0059] The steel support structure 5 is an important part of the portal structure, and its design and arrangement are crucial to the stability and bearing capacity of the entire portal. The steel support structure 5 includes a plurality of key components, specifically including a first front steel support 501, a second front steel support 502, a first rear steel support 503, a second rear steel support 504, a first front steel cross brace 505, a second front steel cross brace 506, a first rear steel cross brace 507, and a second rear steel cross brace 508.

[0060] In the specific arrangement, the first front steel support 501 and the second front steel support 502 are respectively arranged vertically and spaced inside the edge of the steel sleeve 4 close to the main tunnel side. This arrangement allows the steel support to fit closely to the inner wall of the steel sleeve 4, providing stable support for the steel sleeve 4, while ensuring the structural strength and stability of the main tunnel side. The vertical spacing of the first front steel support 501 and the second front steel support 502 can effectively disperse and transfer the load from above and the side, avoid local stress concentration, and thus improve the bearing capacity and deformation resistance of the entire portal structure.

[0061] The first rear steel support 503 and the second rear steel support 504 are respectively arranged vertically and spaced inside the lining structure of the communication channel. Similar to the steel support on the front side, the steel support on the rear side is also arranged vertically and spaced to ensure the stability of the lining structure of the communication channel. Not only can it effectively support the lining structure of the communication channel, but it can also form an integral frame structure with the steel support on the front side to enhance the integrity and rigidity of the portal structure.

[0062] In order to further enhance the stability of the steel support structure 5, the first front steel cross brace 505 and the second front steel cross brace 506 are respectively transversely embedded at the upper and lower ends of the first front steel support 501 and the second front steel support 502. The first front steel cross brace 505 and the second front steel cross brace 506 are respectively connected to the inner side of the steel sleeve 4 at both ends to form a stable transverse support system, which can not only effectively resist the lateral force, but also form a stable frame structure together with the vertical steel support to enhance the overall stability of the portal structure.

[0063] Similarly, the first rear steel cross brace 507 and the second rear steel cross brace 508 are respectively transversely embedded at the upper and lower ends of the first rear steel support 503 and the second rear steel support 504. The first rear steel cross brace 507 and the second rear steel cross brace 508 are respectively connected to the lining structure of the communication channel to form a rear lateral support system. This arrangement enables the rear steel support structure 5 to also have good stability and bearing capacity, and can effectively resist the load from the inside of the communication channel.

[0064] The first front steel support 501 is connected to the first rear steel support 503 through the first connecting steel 513; the second front steel support 502 is connected to the second rear steel support 504 through the second connecting steel 514. There are two sets of first connecting steel 513 arranged in parallel, respectively connected to the ends of the first front steel support 501 and the first rear steel support 503. There are two sets of second connecting steel 514 arranged in parallel, respectively connected to the ends of the second front steel support 502 and the second rear steel support 504.

[0065] Through the design and arrangement of the above-mentioned steel support structure 5, the subway communication channel steel-concrete combined portal structure of the present invention can not only effectively support the steel sleeve 4 and the communication channel lining structure, but also form an integral frame structure to enhance the integrity and rigidity of the portal structure. The design of this steel support structure 5 fully considers the load transfer and structural stability during the construction process, can effectively improve the construction efficiency, reduce the construction risk, and ensure the safety and reliability of the portal structure during use.

[0066] As a specific example of the above example, the further detailed design of the steel support structure 5 is as follows:

[0067] On the basis of the steel support structure 5, a transverse support design is further added to enhance the stability and deformation resistance of the entire portal structure. Specifically, the middle of the first front steel support 501 is connected to the first end of the first front transverse support 509, and the second end of the first front transverse support 509 is connected to the steel sleeve 4. This connection method forms a stable transverse support system between the first front steel support 501 and the steel sleeve 4, which can effectively resist lateral forces and enhance the stability of the structure.

[0068] Similarly, the middle of the second front steel support 502 is also connected to the first end of the second front transverse support 510, and the second end of the second front transverse support 510 is connected to the steel sleeve 4. This design further enhances the stability of the front steel support structure 5, ensuring that during construction and use, the connection between the steel sleeve 4 and the lining structure of the communication channel is more secure, and can effectively disperse and transfer the load.

[0069] On the rear side, the middle of the first rear steel support 503 is connected to the first end of the first rear transverse support 511, and the second end of the first rear transverse support 511 is connected to the communication channel lining structure. This connection method not only enhances the stability of the rear steel support structure 5, but also forms an integral frame structure with the front transverse support, further improving the integrity and rigidity of the portal structure.

[0070] In addition, the middle of the second rear steel support 504 is also connected to the first end of the second rear transverse support 512, and the second end of the second rear transverse support 512 is also connected to the communication channel lining structure. This design further improves the rear transverse support system, so that the entire portal structure has good stability and load-bearing capacity on both the front and rear sides.

[0071] Through the above design, the steel support structure 5 of the present invention not only provides stable support in the vertical direction, but also enhances the anti-deformation ability of the structure through lateral support in the horizontal direction. This multi-dimensional support design enables the tunnel structure to effectively resist various loads during the construction process, ensuring the safety and reliability of the construction. At the same time, during the use stage, this structural design can also effectively withstand various dynamic loads generated during the operation of the subway, ensuring the long-term stability and safety of the communication channel.

[0072] The design of this steel support structure 5 fully considers the actual needs during the construction and use of the subway connecting channel. By reasonably arranging the lateral supports, the stability and bearing capacity of the structure are further optimized, providing a strong guarantee for the safe construction and efficient operation of the subway connecting channel.

[0073] As a preferred example of the above example, the specific implementation of the steel plate structure 6 is as follows:

[0074] The steel plate structure 6 is an important part of the portal structure, and its design and layout are crucial to the stability and functionality of the entire portal. The steel plate structure 6 mainly includes the portal steel plate 601 and the bulkhead steel plate 602, which are connected to the steel support structure 5, the steel sleeve 4 and the communication channel lining structure by welding to form an integrated structural system.

[0075] The tunnel gate steel plate 601 is used to form a tunnel gate structure to ensure the passage function of the communication channel. Specifically, there are multiple groups of tunnel gate steel plates 601, which are respectively arranged at the following positions:

[0076] between the first front steel support 501 and the first rear steel support 503;

[0077] between the second front steel support 502 and the second rear steel support 504;

[0078] Between the first front steel cross brace 505 and the first rear steel cross brace 507;

[0079] between the second front steel cross brace 506 and the second rear steel cross brace 508 .

[0080] These tunnel steel plates 601 are connected to the steel support structure 5 by welding to form a stable tunnel structure to ensure the passage function of the communication channel. The design of the tunnel steel plates 601 takes into account the size and use requirements of the communication channel to ensure that the needs of personnel evacuation and pipeline connection can be met during construction and use.

[0081] The bulkhead steel plates 602 are used to separate the grouting chambers to ensure the stability of the grouting process and the integrity of the structure. There are multiple groups of bulkhead steel plates 602, which are respectively set at the following positions:

[0082] between the first front lateral support 509 and the first rear lateral support 511;

[0083] between the second front lateral support 510 and the second rear lateral support 512;

[0084] The area surrounding the portal structure at the front and rear ends of the steel support structure 5.

[0085] The bulkhead steel plate 602 is connected to the steel support structure 5 and the transverse support by welding to form a plurality of independent grouting chambers. These chambers are used to fill the self-compacting concrete to further enhance the stability and integrity of the structure. The design of the bulkhead steel plate 602 takes into account the pressure distribution during the grouting process and the fluidity of the concrete, ensuring the uniformity and reliability of the grouting process.

[0086] During the specific construction process, the welding of the steel plate structure 6 should ensure the firmness and reliability of the connection. The welding process should comply with relevant standards and specifications to ensure the integrity and rigidity of the structure. The layout of the portal steel plate 601 and the bulkhead steel plate 602 should be adjusted according to the specific project needs to meet different construction and use requirements.

[0087] Through the above design, the steel plate structure 6 of the present invention can not only effectively form a tunnel structure, but also enhance the stability and integrity of the structure by separating the grouting chambers. This design fully considers the actual needs during the construction and use of the subway communication channel, and provides a strong guarantee for the safe construction and efficient operation of the subway communication channel.

[0088] As a preferred example, a waterproof layer is also included. The waterproof layer is an important part of the tunnel structure, and its design and construction are crucial to ensuring the waterproof performance of the structure. The waterproof layer is arranged on the outside and connection of the steel plate structure 6 in the subway communication channel steel-concrete combined tunnel structure, and is filled with polyurethane waterproof material to improve the waterproof performance of the structure.

[0089] Polyurethane waterproof material is a high-performance waterproof material with good adhesion, elasticity and durability. In the present invention, the polyurethane waterproof material forms a continuous waterproof layer by filling the gaps on the outside and joints of the steel plate structure 6, effectively preventing water from penetrating. The construction process of the polyurethane waterproof material includes the following steps:

[0090] Clean the outside and joints of the steel plate structure 6 to ensure that the surface is clean, free of oil and rust, so as to improve the bonding performance of the waterproof material.

[0091] The mixed polyurethane waterproof material is evenly coated on the outside and joints of the steel plate structure 6 to form a waterproof layer with uniform thickness. During the coating process, it should be ensured that the waterproof material completely covers all gaps and joints.

[0092] After coating, the waterproof material naturally solidifies at room temperature to form a waterproof coating with elasticity and adhesion. The curing time varies depending on the ambient temperature and humidity, usually 24 hours.

[0093] In addition, in order to further enhance the performance of the waterproof layer, a geotextile buffer layer can be laid on the surface of the waterproof layer to prevent the waterproof layer from being mechanically damaged during construction and use. This composite waterproof structure not only improves the waterproof performance, but also extends the service life of the waterproof layer.

[0094] Through the above design and construction method, the waterproof layer of the present invention can effectively prevent water penetration and improve the waterproof performance and durability of the subway communication channel tunnel structure 3. This waterproof design fully considers the actual needs during the construction and use of the subway communication channel, and provides a strong guarantee for the safe construction and efficient operation of the subway communication channel.

[0095] As a preferred example, the grouting system is also a key component to ensure the integrity and stability of the structure. The implementation of the grouting system is as follows:

[0096] The grouting system includes a plurality of grouting holes 603, which are arranged on the bulkhead steel plate 602 around the portal structure at the front end of the steel support structure 5. The design and arrangement of the grouting holes 603 are intended to ensure that the self-compacting concrete can be evenly injected into the grouting chamber, thereby achieving overall reinforcement of the structure.

[0097] During the construction process, the grouting hole 603 is connected to the grouting chamber through the bulkhead steel plate 602 to form a complete grouting channel. During grouting, self-compacting concrete is injected from the grouting hole 603 to fill the space in the grouting chamber. The grouting pressure is monitored and adjusted in real time by a precise control device to ensure the uniformity and safety of the grouting process. After the grouting is completed, the grouting hole 603 is sealed by a special plugging device to prevent the slurry from flowing back or leaking.

[0098] In order to further optimize the grouting effect, the grouting system is also equipped with an intelligent constant pressure grouting device. This device can monitor the slurry level, air pressure and slurry output in the slurry storage barrel in real time to ensure the stability and consistency of the grouting process. In addition, the grouting system also includes a multi-stage mixing tank. The design of mixing tanks and sedimentation tanks at different heights effectively prevents slurry sedimentation and ensures the uniformity of the slurry.

[0099] Through the above design and construction method, the grouting system of the present invention can effectively improve the integrity and stability of the tunnel structure 3 of the subway communication channel, while ensuring the efficiency and safety of the grouting process. The design of this grouting system fully considers the actual needs during the construction process, and provides a strong guarantee for the safe construction and efficient operation of the subway communication channel.

[0100] As a specific example, in the steel-concrete combined tunnel structure of the subway communication channel of the present invention, the connection method of the steel support structure 5 and the steel plate structure 6 adopts a welding process to ensure the integrity and stability of the structure. The specific implementation method is as follows:

[0101] The welding process is a key technical means to connect the steel support structure 5 and the steel plate structure 6. During the construction process, the surface of the connection part of the steel support structure 5 and the steel plate structure 6 is first cleaned to ensure that the welding surface is free of oil, rust and impurities, thereby improving the welding quality and structural reliability. During welding, appropriate welding materials and process parameters are used to ensure that the strength and toughness of the welded joint meet the design requirements.

[0102] As a preferred example, both ends of the first front steel support 501 and the second front steel support 502 respectively support the main tunnel lining structure, which is specifically as follows:

[0103] During the construction of the subway communication channel, the main tunnel lining structure is an important supporting part of the communication channel portal structure 3. In order to ensure the stability and safety of the communication channel portal structure 3, the first front steel support 501 and the second front steel support 502 are connected to the main tunnel lining structure at both ends. This connection method provides reliable support for the communication channel portal through the high strength and stability of the steel support, and effectively disperses the load generated during construction and use.

[0104] In specific implementation, the first front steel support 501 and the second front steel support 502 are fixed to the main tunnel lining structure at both ends by welding or high-strength bolt connection. This connection method not only ensures the integrity of the structure, but also improves construction efficiency and reduces on-site operation time. In addition, the layout and connection design of the steel support fully considers the complex stress conditions in the construction of the subway connecting channel, ensuring the stability and safety of the structure during construction and use.

[0105] Through the above design and construction method, the subway connecting channel steel-concrete combined tunnel structure of the present invention can effectively improve the integrity and stability of the structure, while ensuring the safety and efficiency of the construction process. This design fully considers the actual needs in the construction of subway connecting channels and provides a strong guarantee for the safe construction and efficient operation of subway connecting channels.

[0106] Example 3

[0107] The concrete construction method of the subway communication channel steel-concrete combined tunnel door of the present invention is as follows:

[0108] A shield machine is used to complete the excavation of the communication channel and the assembly of the communication channel segment 2. Grouting reinforcement is carried out behind the segment wall until the slurry solidifies and reaches the designed strength. This process ensures the stability of the communication channel segment 2 and provides a solid foundation for subsequent construction.

[0109] Separate the shield negative ring, remove the reserved steel sleeve 4 in the communication channel, and weld the main tunnel segment 1 and the communication channel segment 2 with the steel sleeve 4 to form the initial structure of the portal. This step ensures the tight connection between the main tunnel and the communication channel through welding, and enhances the integrity of the structure.

[0110] A steel support structure 5 is installed inside the edge of the steel sleeve 4 and on the lining structure of the communication channel, and the steel support structure 5 is arranged in a tic-tac-toe shape. This arrangement provides reliable support for the portal structure through the high strength and stability of the steel, and effectively disperses the load generated during construction and use.

[0111] A steel plate structure 6 is welded on the steel support structure 5, and the steel plate structure 6 includes a portal steel plate 601 and a bulkhead steel plate 602. The portal steel plate 601 is used to form a portal structure, and the bulkhead steel plate 602 is used to separate the grouting chamber. The steel plate structure 6 is connected to the steel support structure 5, the steel sleeve 4, and the communication channel lining structure by welding to form an integrated structure, which further enhances the integrity and rigidity of the structure.

[0112] Self-compacting concrete is injected into the grouting chamber through the grouting holes 603 provided on the compartment steel plate 602 around the portal structure at the front end of the steel support structure 5. During the grouting process, the grouting pressure is monitored in real time until the grouting pressure reaches a preset value, and then the grouting holes 603 are blocked to complete the filling of the grouting chamber. The use of self-compacting concrete ensures the filling quality of the grouting chamber and enhances the stability and durability of the structure.

[0113] Polyurethane waterproof material is coated on the outer side and joints of the steel plate structure 6 to form a waterproof layer. The polyurethane waterproof material has good adhesion and elasticity, can effectively prevent water penetration, and improve the waterproof performance of the structure.

[0114] The quality inspection of the portal structure after construction is completed to ensure that the integrity, stability and waterproof performance of the structure meet the design requirements. The quality inspection includes non-destructive testing of welding joints, filling quality inspection of grouting chambers and integrity inspection of waterproof layers.

[0115] Through the above construction method, the subway connecting channel steel-concrete combined portal structure of the present invention can effectively improve the construction efficiency, enhance the integrity and stability of the structure, and ensure the safety and efficiency of the construction process. This construction method fully considers the actual needs in the construction of subway connecting channels and provides a strong guarantee for the safe construction and efficient operation of subway connecting channels.

[0116] As a preferred example of the above example, after the filling of the grouting chamber is completed, the step of applying anti-corrosion paint on the outer side of the steel plate structure 6 is further included, which is specifically as follows:

[0117] Clean the outside of the steel plate structure 6 to remove oil, rust and impurities on the surface to ensure that the surface is dry and clean.

[0118] Apply anti-corrosion paint evenly on the cleaned steel plate surface. The anti-corrosion paint should be a high-performance product suitable for steel structure, and the coating should be even and without any gaps.

[0119] After painting, check the integrity of the coating to ensure there are no pores or flow. If there are any defects, they should be repaired in time.

[0120] Through the above steps, the anti-corrosion paint coating on the outer side of the steel plate structure 6 can effectively improve the durability and corrosion resistance of the structure, and ensure the stability and safety of the subway communication passage portal structure 3 in long-term use.

[0121] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A steel-concrete combined tunnel structure for a subway communication channel, characterized in that: include, Main tunnel segments (1), used to form the main tunnel lining structure; A communication channel segment (2), connected to the main tunnel segment (1), and used to form a communication channel lining structure; A steel sleeve (4) is arranged at the connection between the main tunnel segment (1) and the communication channel segment (2) and is used to form an initial structure of the communication channel portal structure (3); A steel support structure (5), the steel support structure (5) is in a tic-tac-toe shape and is arranged on the steel sleeve (4) and the communication channel lining structure; The steel plate structure (6) is welded between the steel support structure (5), the steel sleeve (4) and the connecting channel lining structure, and is used to form a tunnel door in the middle of the steel support structure (5) and to separate a grouting chamber between the tunnel door and the steel sleeve (4) and the connecting channel segment (2), and the grouting chamber is used to fill concrete.

2. The steel-concrete combined tunnel structure for a subway communication channel according to claim 1 is characterized in that: The steel support structure (5) comprises: a first front steel support (501), a second front steel support (502), a first rear steel support (503), a second rear steel support (504), a first front steel cross brace (505), a second front steel cross brace (506), a first rear steel cross brace (507) and a second rear steel cross brace (508); wherein the first front steel support (501) and the second front steel support (502) are respectively arranged vertically and spaced inside the edge of the steel sleeve (4) close to the main tunnel side; the first rear steel support (503) and the second rear steel support (504) are respectively arranged vertically and spaced inside the lining structure of the communication channel; the first front steel cross brace (505) and the second front steel cross brace (506) are respectively arranged transversely inlaid on the first front steel support (5 01) and the upper and lower ends of the second front steel support (502), and the two ends of the first front steel cross brace (505) and the second front steel cross brace (506) are respectively connected to the inner side of the steel sleeve (4); the first rear steel cross brace (507) and the second rear steel cross brace (508) are respectively transversely embedded in the upper and lower ends of the first rear steel support (503) and the second rear steel support (504), and the two ends of the first rear steel cross brace (507) and the second rear steel cross brace (508) are respectively connected to the lining structure of the communication channel; the first front steel support (501) and the first rear steel support (503) are connected by a first connecting steel (513); the second front steel support (502) and the second rear steel support (504) are connected by a second connecting steel (514).

3. The steel-concrete combined tunnel structure of a subway communication channel according to claim 2 is characterized in that: The first front steel support (501) is connected to the first end of the first front transverse support (509) in the middle, and the second end of the first front transverse support (509) is connected to the steel sleeve (4); the second front steel support (502) is connected to the first end of the second front transverse support (510) in the middle, and the second end of the second front transverse support (510) is connected to the steel sleeve (4); the first rear steel support (503) is connected to the first end of the first rear transverse support (511) in the middle, and the second end of the first rear transverse support (511) is connected to the connecting channel lining structure; the second rear steel support (504) is connected to the first end of the second rear transverse support (512) in the middle, and the second end of the second rear transverse support (512) is connected to the connecting channel lining structure.

4. The steel-concrete combined tunnel structure for a subway communication channel according to claim 3 is characterized in that: The steel plate structure (6) comprises a portal steel plate (601) and a bulkhead steel plate (602). The portal steel plate (601) comprises a plurality of groups, which are arranged between the first front steel support (501) and the first rear steel support (503), and between the second front steel support (502) and the second rear steel support (504); between the first front steel cross brace (505) and the first rear steel cross brace (507), and between the second front steel cross brace (506) and the second rear steel cross brace (508). The portal steel plate (601) forms a portal structure. The bulkhead steel plate (602) comprises a plurality of groups, which are respectively arranged between the first front transverse support (509) and the first rear transverse support (511), between the second front transverse support (510) and the second rear transverse support (512), and in the area surrounding the portal structure at the front and rear end surfaces of the steel support structure (5).

5. The steel-concrete combined tunnel structure for a subway communication channel according to claim 1 is characterized in that: It also includes a waterproof layer, which is arranged on the outside and connection of the steel plate structure (6) and is filled with polyurethane waterproof material to improve the waterproof performance of the structure.

6. The steel-concrete combined tunnel structure for a subway communication channel according to claim 4 is characterized in that: It also includes a grouting system, including a grouting hole (603), wherein the grouting hole (603) is arranged on the compartment steel plate (602) around the portal structure on the front end face of the steel support structure (5), and is used to inject self-compacting concrete for overall reinforcement into the grouting compartment.

7. The steel-concrete combined tunnel structure for a subway communication channel according to claim 1 is characterized in that: The steel support structure (5) and the steel plate structure (6) are both connected by welding.

8. The steel-concrete combined tunnel structure for a subway communication channel according to claim 2 is characterized in that: The first front steel support (501) and the second front steel support (502) respectively support the main tunnel lining structure at both ends.

9. A construction method for a subway communication channel steel-concrete combined tunnel door, based on a subway communication channel steel-concrete combined tunnel door structure according to any one of claims 1 to 8, characterized in that: The following steps are included: A shield machine is used to complete the excavation of the communication channel and the assembly of the communication channel segments (2), and grouting reinforcement is performed behind the segment wall until the grout solidifies and reaches the designed strength; Separate the shield negative ring, and weld the main tunnel segment (1) and the communication channel segment (2) with a steel sleeve (4) to form the initial structure of the tunnel portal; A steel support structure (5) is installed inside the edge of the steel sleeve (4) and on the lining structure of the communication channel, wherein the steel support structure (5) is arranged in a tic-tac-toe shape; A steel plate structure (6) is welded on the steel support structure (5), wherein the steel plate structure (6) comprises a portal steel plate (601) and a bulkhead steel plate (602), wherein the portal steel plate (601) is used to form a portal structure, and the bulkhead steel plate (602) is used to separate a grouting chamber, and the steel plate structure (6) is connected to the steel support structure (5), the steel sleeve (4) and the communication channel lining structure by welding to form an integrated structure; Injecting self-compacting concrete into the grouting chamber through the grouting holes (603) provided on the bulkhead steel plate (602) around the portal structure at the front end of the steel support structure (5) until the grouting pressure reaches a preset value, and then plugging the grouting holes (603) to complete the filling of the grouting chamber; Coating a polyurethane waterproof material on the outer side and joints of the steel plate structure (6) to form a waterproof layer; Carry out quality inspection on the portal structure after construction is completed to ensure that the integrity, stability and waterproof performance of the structure meet the design requirements.

10. A method for constructing a steel-concrete combined tunnel door for a subway communication channel according to claim 9, characterized in that: After the filling of the grouting chamber is completed, the method further includes painting anti-corrosion paint on the outer side of the steel plate structure (6).

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