Tunnel and cross passage connection system based on multi-compartment box-type structure and its construction method

Abstract

The present invention discloses a tunnel and transverse passage connection system based on a multi-compartment box-type structure and a construction method thereof, wherein a track is arranged in the tunnel, a drainage ditch is arranged in the middle of the track, a ballast is arranged below the track, a train running profile is located above the ballast, an evacuation platform is arranged on one side of the tunnel, a transverse passage is transversely connected to the tunnel, the transverse passage includes initial support and secondary lining from outside to inside, a post-cast ring beam is arranged at the junction of the transverse passage and the tunnel structure, the ballast and the transverse passage are connected and transitioned by a prefabricated box-shaped steel member, the prefabricated box-shaped steel member is a multi-compartment box-shaped steel member, and is connected to the evacuation platform along the longitudinal direction of the tunnel. The present invention not only meets the requirements of laying and normal use of various pipelines in the tunnel, but also meets the requirements of opening a door opening in the transverse passage and emergency evacuation of personnel, has a simple process, is easy to construct, has high economic and social benefits, and has broad application prospects in urban rail transit, railways, highways and other projects.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel engineering, and in particular relates to a tunnel and cross-channel connection system based on a multi-compartment box-type structure and a construction method thereof. Background Art

[0002] For the current traffic function tunnel projects in various cities in China, due to the requirement for emergency evacuation of personnel, when the tunnel length exceeds a certain limit (such as 600m for urban rail transit), an emergency evacuation passage needs to be set up. Urban rail transit tunnels are generally double-track tunnel projects. At this time, it is necessary to set up a cross passage between the double-track tunnels at a spacing of no more than 600m. The height of the doorway at the junction of the cross passage and the main line tunnel should generally not be less than 2m. The existence of the doorway blocks the laying route of various pipelines on the side wall of the tunnel.

[0003] The current conventional practice is to bypass the pipeline upward to the top of the doorway, which is difficult to implement smoothly for large-diameter or high-rigidity pipelines because within the effective space, bending the large-diameter or high-rigidity pipeline from the bottom of the evacuation platform at a nearly vertical angle and then bypassing it upward will increase the resistance of the pipeline joints and the water flow along the way and affect the signal propagation of the cable. Large-diameter cables for high-voltage power are even more difficult to bend smoothly, leaving huge safety hazards and potential risks, and it is even more impossible to meet the project progress and quality requirements. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a tunnel and transverse passage connection system based on a multi-compartment box-type structure and a construction method thereof in view of the deficiencies in the above-mentioned prior art, wherein a prefabricated multi-compartment box-type steel member is arranged between the tunnel and the transverse passage, and along the direction of the transverse passage, the multi-compartment box-type steel member is smoothly connected with the bottom plate of the transverse passage to meet the needs of personnel evacuation through the transverse passage; along the direction of the tunnel, the top surface of the box-type steel member is smoothly connected with the evacuation platform to meet the needs of safe longitudinal movement of personnel in the tunnel, and at the same time, the internal multi-compartment structure meets the needs of crossing various pipelines under the evacuation platform, and meets the needs of conventional opening of the transverse passage and normal evacuation function of the tunnel.

[0005] The present invention adopts the following technical solutions:

[0006] The tunnel and cross-passage connection system based on the multi-compartment box-type structure includes a formed tunnel, a track is arranged in the tunnel, a ballast is arranged under the track, a drainage ditch is arranged in the middle of the ballast, the train running profile is located above the ballast, an evacuation platform is arranged on one side of the tunnel, and the tunnel is laterally connected with a cross-passage. The cross-passage includes initial support and secondary lining from the outside to the inside. A post-cast ring beam is arranged at the junction of the cross-passage and the tunnel structure. The ballast and the cross-passage are connected and transitioned by prefabricated box-type steel components. The prefabricated box-type steel components are multi-compartment box-type steel components, which are connected with the evacuation platform along the longitudinal direction of the tunnel.

[0007] Specifically, the evacuation platform is arranged on the side of the tunnel close to the cross passage, and is fixedly connected to the side wall of the tunnel by prefabricated corbels and post-installed anchor bolts. The evacuation platform includes a horizontal evacuation platform and an oblique evacuation platform. The prefabricated box-type steel structure is connected to the horizontal evacuation platform via the oblique evacuation platform.

[0008] Furthermore, the height difference between the horizontal evacuation platform and the rail surface is 850 to 900 mm.

[0009] Furthermore, the inclined evacuation platform is longitudinally connected to the prefabricated box-shaped steel member, and the slope of the inclined evacuation platform along the longitudinal direction of the tunnel is 5% to 10%.

[0010] Specifically, the prefabricated box-shaped steel member is located at the bottom of the tunnel at the opening of the transverse passage, and a plain concrete cushion layer is provided at the junction of the prefabricated box-shaped steel member and the bottom of the tunnel.

[0011] Specifically, the evacuation platform and prefabricated box-type steel components do not intrude into the train running outline, and a safety margin is set.

[0012] Furthermore, the prefabricated box-shaped steel members are arranged in a stepped manner along the direction of the transverse passage, and the height difference between the steps is 100 to 200 mm.

[0013] Furthermore, the prefabricated box-shaped steel structure includes an upper compartment, a middle compartment and a lower compartment from top to bottom. The upper compartment and the middle compartment are used to place water pipes or cables, and the lower compartment is used to place optical cables or electrical cables.

[0014] Specifically, the prefabricated box-shaped steel member is smoothly connected to the bottom plate of the transverse channel, and the top of the prefabricated box-shaped steel member is at the same elevation as the bottom plate of the transverse channel.

[0015] Another technical solution of the present invention is a construction method of a tunnel and a cross passage connection system based on a multi-bin box-type structure, comprising the following steps:

[0016] S1. Carry out tunnel excavation, lining assembly or pouring construction according to the predetermined axis;

[0017] S2. Temporary support is set up in the formed tunnel in the area affected by the opening of the transverse passage, and then the tunnel lining in the area of ​​the opening of the transverse passage is removed. Then, tunnel excavation construction is carried out in the transverse passage range, initial support is set up, and the post-cast ring beam is cast to connect with the tunnel. After the excavation of the transverse passage is completed, secondary lining is applied to complete the construction of the main structure of the transverse passage;

[0018] S3. According to the construction schedule, the ballast bed is poured in the tunnel, a central drainage ditch is set in the middle of the ballast bed, and tracks are laid on the ballast bed;

[0019] S4. A horizontal evacuation platform is set up on the side wall of the tunnel outside the influence range of the cross passage opening. The height difference between the horizontal evacuation platform and the rail surface is 850-900mm;

[0020] S5. Prefabricated box-shaped steel components are installed at the opening of the cross passage and the tunnel floor area, and a plain concrete cushion is set between the bottom of the prefabricated box-shaped steel components and the tunnel structure;

[0021] S6. An oblique evacuation platform is set up between the horizontal evacuation platform and the prefabricated box-shaped steel structure to construct a continuous safe evacuation passage along the longitudinal direction of the tunnel. The construction principle is: horizontal evacuation platform → oblique evacuation platform → prefabricated multi-compartment box-shaped steel structure → oblique evacuation platform → horizontal evacuation platform;

[0022] S7. Lay various pipelines longitudinally along the tunnel sidewall: pipelines within the length of the horizontal evacuation platform shall be laid parallel to the horizontal evacuation platform; pipelines within the length of the oblique evacuation platform shall be laid with the same longitudinal slope as the oblique evacuation platform, and the minimum vertical safety distance from the oblique evacuation platform shall be controlled to be 100-150mm;

[0023] S8. All pipelines within the opening range of the horizontal passage pass through the prefabricated box-type steel components. The laying principle is: water pipes or cables are placed in the upper and middle compartments, and optical cables or electrical cables are placed in the lower compartments.

[0024] Compared with the prior art, the present invention has at least the following beneficial effects:

[0025] The present invention is based on a tunnel and transverse passage connection system with a multi-compartment box-type structure, a multi-compartment box-type steel member arranged between the tunnel and the transverse passage, an oblique and horizontal evacuation platform arranged along the longitudinal direction of the tunnel, and a connection between the box-type steel member and the tunnel. The steel materials, waterproof concrete, cement-based composite materials, and anchor bolts for fixing the evacuation platform involved are all conventional materials (equipment), and their corresponding sizes are of conventional types, which are easy to process and manufacture.

[0026] Furthermore, setting up horizontal evacuation platforms and oblique evacuation platforms can meet the needs of personnel moving along the longitudinal direction of the tunnel, and meet the needs of daily maintenance and emergency evacuation of personnel.

[0027] Furthermore, the inclined evacuation platform has a longitudinal slope of 5% to 10% along the tunnel, which is beneficial to the safety of personnel evacuation in emergency situations.

[0028] Furthermore, the number of layers of the multi-compartment box-type steel structure and the number of compartments on each layer can be flexibly adjusted according to the required pipeline crossing conditions.

[0029] Furthermore, the upper compartments are mainly used for the passage of water pipes / cables with larger diameters, and the lower compartments are mainly used for the passage of optical cables / cables with smaller diameters; all pipelines laid along the side walls of the tunnel within the doorways of all transverse passages do not need to go around above the doorways, but can pass through the box-type steel structures along the longitudinal direction of the evacuation platform.

[0030] Furthermore, the prefabricated box-shaped steel components are connected to the bottom plate of the transverse channel along the transverse channel direction and to the evacuation platform along the longitudinal direction of the tunnel, thus meeting the functional requirements for emergency evacuation of personnel in the tunnel.

[0031] A construction method for a tunnel and cross passage connection system based on a multi-compartment box-type structure. Prefabricated box-type steel components are arranged at the connection between the tunnel and the cross passage. The number and number of compartments can be flexibly set according to the pipelines that need to pass through. The construction process has the characteristics of flexibility, adaptability, safety, reliability, simplicity, etc.

[0032] In summary, the present invention not only meets the needs of laying and normal use of various pipelines in the tunnel, but also meets the needs of opening doorways in cross passages and emergency evacuation of personnel. It has simple process and convenient construction, high economic and social benefits, and has broad application prospects in urban rail transit, railways, highways and other projects.

[0033] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is the cross-sectional view of the connection between the tunnel and the cross passage;

[0035] Figure 2 It is the elevation drawing of the connection between the tunnel and the cross passage (along the longitudinal direction of the tunnel);

[0036] Figure 3 It is the plan view of the connection between the tunnel and the cross passage;

[0037] Figure 4 for Figure 1 Large-scale diagram of node A in the middle.

[0038] Among them: 1. Tunnel; 2. Cross passage; 3. Train running profile; 4. Track; 5. Roadbed; 6. Drainage ditch; 7. Initial support; 8. Secondary lining; 9. Post-cast ring beam; 10. Prefabricated box-type steel components; 11. Upper compartment; 12. Middle compartment; 13. Lower compartment; 14. Water pipes or cables; 15. Optical cables or cables; 16. Horizontal evacuation platform; 17. Oblique evacuation platform. DETAILED DESCRIPTION

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "one side", "one end", "one side" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The present invention provides a tunnel and transverse passage connection system based on a multi-compartment box-type structure and a construction method thereof, which enriches the existing means of connecting tunnels and transverse passages and broadens the construction ideas of the connection parts between the tunnel body and the auxiliary passages. By utilizing the function of the internal space of the prefabricated multi-compartment box-type steel components to pass through various pipelines, it is realized that the pipelines laid along the side walls of the tunnel within the door openings of all transverse passages do not need to go around to the top of the door openings, but can pass through the box-type steel components longitudinally along the evacuation platform. It meets the needs of laying and normal use of various pipelines in the tunnel, and also meets the needs of opening the door openings of the transverse passages and emergency evacuation of personnel. At the same time, the process is simple and the construction is simple, which provides a new idea for ensuring the rationality of the project plan, controllable project risks and construction period, and reliable project quality and safety.

[0042] See also Figure 1The present invention discloses a tunnel and transverse passage connection system based on a multi-compartment box-type structure, comprising a formed tunnel 1 and a transverse passage 2, wherein the transverse passage 2 is laterally arranged to be connected to the tunnel 1, and a prefabricated box-shaped steel member 10 is arranged at the connection between the transverse passage 2 and the tunnel 1, and the prefabricated box-shaped steel member 10 is connected to the bottom plate of the transverse passage 2 in a straight line, and the top elevations of the two are consistent, the prefabricated box-shaped steel member 10 is a multi-compartment box-shaped steel member, and the prefabricated box-shaped steel member 10 is connected to an evacuation platform, a train running profile 3 is arranged inside the tunnel 1, the train running profile 3 is arranged on a track 4, a roadbed 5 is arranged under the track 4, a drainage ditch 6 is arranged inside the track 4, an initial support 7 is arranged outside the transverse passage 2, and a secondary lining 8 is arranged inside the initial support 7, and a post-cast ring beam 9 for connecting to the tunnel 1 is arranged at the end of the transverse passage 2, and the post-cast ring beam 9 is connected to the prefabricated box-shaped steel member 10 arranged in the tunnel 1.

[0043] See also Figure 2 The evacuation platform is arranged on one side of the tunnel 1 near the transverse passage 2 for evacuating personnel in an emergency, and includes a horizontal evacuation platform 16 and an oblique evacuation platform 17. The prefabricated box-shaped steel member 10 is connected to the horizontal evacuation platform 16 via the oblique evacuation platform 17.

[0044] The horizontal evacuation platform 16 and the oblique evacuation platform 17 and the multi-compartment box-shaped steel structure 10 must not intrude into the train running profile 3, and a safety margin of 60 mm must be left to ensure driving safety. The height difference between the horizontal evacuation platform 16 and the track surface is 850-900 mm.

[0045] The inclined evacuation platform 17 is longitudinally connected to the multi-compartment box-type steel structure 10, and its slope along the longitudinal direction of the tunnel 1 is flexibly adjusted according to the height difference between the horizontal evacuation platform 16 and the multi-compartment box-type steel structure 10. The slope of the inclined evacuation platform 17 along the longitudinal direction of the tunnel 1 is 5% to 10%, which meets the requirements for smooth evacuation of personnel in emergency situations to the greatest extent.

[0046] See also Figure 3 The prefabricated multi-compartment box-shaped steel member 10 is located at the connection between the tunnel 1 and the transverse passage 2, and at the bottom of the opening range of the transverse passage 2. A plain concrete cushion layer is provided at the connection between the prefabricated multi-compartment box-shaped steel member 10 and the bottom of the tunnel 1, and the thickness of the plain concrete cushion layer is 50 mm.

[0047] Furthermore, the plain concrete cushion layer adopts low-grade concrete, the evacuation platform adopts cement-based composite materials or organic materials, and is fixed to the side wall of the tunnel 1 by prefabricated corbels and post-installed anchor bolts.

[0048] See also Figure 4The prefabricated box-shaped steel member 10 is used to provide space for various pipelines to pass through. The multi-bin box-shaped steel member 10 is stepped along the direction of the transverse channel 2 to reduce the height difference between the lowest step and the surface of the ballast 5. The specific number of steps and the step height are flexibly adjusted according to the height difference between the transverse channel 2 and the ballast 5. The height difference between the steps is generally controlled at 100 to 200 mm.

[0049] The prefabricated box-shaped steel structure 10 includes an upper compartment 11, a middle compartment 12 and a lower compartment 13 from top to bottom. The upper compartment 11 and the middle compartment 12 are used to place large-diameter water pipes or cables 14, and the lower compartment 13 is used to place small-diameter optical cables or cables 15.

[0050] The multi-bin box-shaped steel member 10 is made of Q235 or Q345 steel, and is arranged in the opening area of ​​the tunnel 1 . Its length along the direction of the tunnel 1 is consistent with the size of the opening of the tunnel 1 .

[0051] The present invention provides a construction method for a tunnel and a cross passage connection system based on a multi-bin box-type structure, comprising the following steps:

[0052] S1. According to the requirements of the design documents, excavation, lining assembly or pouring of tunnel 1 shall be carried out along the established axis;

[0053] S2. Temporary support is set up in the formed tunnel in the area affected by the opening of the transverse channel 2, and then the tunnel lining in the opening area of ​​the transverse channel 2 is removed. Then, tunnel excavation construction is carried out in the range of the transverse channel 2, initial support is set up, and the post-cast ring beam 9 is cast in time to connect with the tunnel 1. After the excavation of the transverse channel 2 is completed, the secondary lining 8 is applied in time to complete the main structure construction of the transverse channel 2;

[0054] S3. According to the construction schedule, the ballast bed 5 is poured in the tunnel 1, a central drainage ditch 6 is set in the middle of the ballast bed 5, and the track 4 is laid on the ballast bed;

[0055] S4. A horizontal evacuation platform 16 of a certain height is set up on the side wall of the tunnel 1 outside the influence range of the opening of the transverse passage 2;

[0056] The height difference between the horizontal evacuation platform 16 and the rail surface is 850-900 mm.

[0057] S5. Prefabricated multi-compartment box-shaped steel members 10 are set up at the opening position of the transverse passage 2 and the bottom plate area of ​​the tunnel 1. A plain concrete cushion layer of a certain thickness is set between the bottom of the prefabricated multi-compartment box-shaped steel members 10 and the structure of the tunnel 1 as required;

[0058] S6. An oblique evacuation platform 17 is set up between the horizontal evacuation platform 16 and the prefabricated multi-compartment box-shaped steel member 10 to construct a continuous safe evacuation passage along the longitudinal direction of the tunnel 1;

[0059] That is: horizontal evacuation platform 16 → oblique evacuation platform 17 → prefabricated multi-bin box-shaped steel structure 10 → oblique evacuation platform 17 → horizontal evacuation platform 16;

[0060] S7. Lay various pipelines longitudinally along the side wall of the tunnel 1. Lay the pipelines horizontally on the side wall of the tunnel on the side of the evacuation platform 16 according to the established design plan and conventional methods. The pipelines within the length range of the oblique evacuation platform 17 are laid with a longitudinal slope consistent with the oblique evacuation platform 17, and the minimum vertical distance between the oblique evacuation platform 17 is controlled to facilitate later maintenance.

[0061] The minimum vertical distance is 100-150mm.

[0062] The water pipes or cables 14 and the optical cables or cables 15 outside the influence range of the opening of the transverse passage 2 are all hung on the side wall of the tunnel 1; the water pipes or cables 14 and the optical cables or cables 15 within the influence range of the opening of the transverse passage 2 are all considered to pass through the prefabricated multi-compartment box-type steel structure 10.

[0063] S8. All pipelines within the opening range of the horizontal passage 2 pass through the prefabricated box-shaped steel structure 10. To facilitate maintenance, they are laid according to the following principles: the upper compartment 11 and the middle compartment 12 are mainly used to place large-diameter water pipes or cables 14, and the lower compartment 13 is mainly used to place small-diameter optical cables or cables 15.

[0064] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0065] It is still quite difficult to find the connection structure and construction technology of the formed tunnel and the auxiliary channel that can adapt to the smooth crossing of pipelines under any conditions and meet the evacuation needs of the tunnel under the existing theoretical level and construction technology conditions. Because the space requirements for the crossing of various pipelines are inconsistent, the evacuation requirements of the tunnel are inconsistent with the width of the evacuation platform and the longitudinal slope of the transition section, and the boundary conditions and the surrounding environment are ever-changing. The selection of the connection components between the formed tunnel and the auxiliary channel must be based on the emergency evacuation in the tunnel and the crossing requirements of various pipelines laid on the side walls of the tunnel. At the same time, the limit requirements of the running trains are considered to achieve the purpose of smooth passage of pipelines and emergency evacuation of personnel. Especially in the case where there are many pipelines in the tunnel due to functional requirements such as intelligent evacuation and smart operation, or there are many passengers in the tunnel due to the large passenger capacity system. The current connection method between the main line tunnel and the auxiliary channel still needs to be based on the basic principles of function first, adapting to local conditions, treating the symptoms, and flexible application.

[0066] The "tunnel and transverse passage connection process based on multi-compartment box-type structure" of the present invention mainly refers to setting a multi-compartment box-type steel structure between the tunnel body and the transverse passage, connecting the transverse passage and the roadbed in the tunnel, and connecting with the evacuation platform along the longitudinal direction of the tunnel to meet the emergency evacuation function requirements of personnel in both the transverse and longitudinal directions. At the same time, the multi-compartment box-type space set up inside is utilized to meet the laying requirements of various pipelines in the longitudinal direction of the tunnel, so as to achieve the purpose of smooth passage of pipelines from the portal of the transverse passage. It has high economic and social benefits, and has broad application prospects in urban rail transit, railways, highways and other projects.

[0067] In summary, the present invention provides a tunnel and transverse passage connection system based on a multi-compartment box-type structure and a construction method thereof, which effectively solves the problem of large-diameter or high-rigidity pipelines on the tunnel side wall passing through the transverse passage opening. The multi-compartment type steel structure, on the one hand, meets the problem of the passage of various pipelines on the tunnel side wall within the transverse passage opening range. At the same time, through the transverse stepped design, it satisfies the smooth connection between the box-type steel structure and the bottom plate of the transverse passage, minimizes the height difference between the top surface of the box-type steel structure and the roadbed surface, and meets the needs of evacuating personnel in the tunnel through the roadbed surface and the transverse passage in an emergency. It has broad application prospects.

[0068] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A construction method for a tunnel and a cross passage connection system based on a multi-compartment box-type structure, characterized in that: The tunnel and cross passage connection system based on a multi-compartment box-type structure comprises a formed tunnel (1), a track (4) is arranged in the tunnel (1), a ballast (5) is arranged below the track (4), a central drainage ditch (6) is arranged in the middle of the ballast (5), a train running profile (3) is located above the ballast (5), an evacuation platform is arranged on one side of the tunnel (1) and is connected to the cross passage (2), the cross passage (2) comprises an initial support (7) and a secondary lining (8) from the outside to the inside, and the cross passage (2) and the tunnel (1) are connected by a post-cast ring beam. (9) effectively connect the ballast (5) and the cross passage (2) by means of a prefabricated box-shaped steel member (10) for connection and transition. The prefabricated box-shaped steel member (10) is a multi-compartment box-shaped steel member, which is connected to the evacuation platform along the longitudinal direction of the tunnel (1). The prefabricated box-shaped steel member (10) includes an upper compartment (11), a middle compartment (12) and a lower compartment (13) from top to bottom. The upper compartment (11) and the middle compartment (12) are used to place water pipes or cables, and the lower compartment (13) is used to place optical cables or electrical cables. Specific construction steps: S1. Carry out tunnel excavation, lining assembly or pouring construction according to the predetermined axis; S2. Temporary support is set up in the formed tunnel in the area affected by the opening of the transverse passage, and then the tunnel lining in the area of ​​the opening of the transverse passage is removed. Then, tunnel excavation construction is carried out in the transverse passage range, initial support is set up, and the post-cast ring beam is cast to connect with the tunnel. After the excavation of the transverse passage is completed, secondary lining is applied to complete the construction of the main structure of the transverse passage; S3. According to the construction schedule, the ballast bed is poured in the tunnel, a central drainage ditch is set in the middle of the ballast bed, and tracks are laid on the ballast bed; S4. A horizontal evacuation platform is set up on the side wall of the tunnel outside the influence range of the cross passage opening. The height difference between the horizontal evacuation platform and the rail surface is 850-900mm; S5. Prefabricated box-shaped steel components are installed at the opening of the cross passage and the tunnel floor area, and a plain concrete cushion is set between the bottom of the prefabricated box-shaped steel components and the tunnel structure; S6. An oblique evacuation platform is set up between the horizontal evacuation platform and the prefabricated box-shaped steel structure to construct a continuous safe evacuation passage along the longitudinal direction of the tunnel. The construction principle is: horizontal evacuation platform → oblique evacuation platform → prefabricated box-shaped steel structure → oblique evacuation platform → horizontal evacuation platform; S7. Lay various pipelines longitudinally along the tunnel sidewall: pipelines within the length of the horizontal evacuation platform shall be laid parallel to the horizontal evacuation platform; pipelines within the length of the oblique evacuation platform shall be laid with the same longitudinal slope as the oblique evacuation platform, and the minimum vertical safety distance from the oblique evacuation platform shall be controlled to be 100~150mm; S8. All pipelines within the opening range of the horizontal passage pass through the prefabricated box-type steel components. The laying principle is: water pipes or cables are placed in the upper and middle compartments, and optical cables or electrical cables are placed in the lower compartments.

2. The construction method of the tunnel and cross passage connection system based on the multi-bin box-type structure according to claim 1 is characterized in that: The evacuation platform is arranged on a side of the tunnel (1) close to the transverse passage (2), and is fixedly connected to the side wall of the tunnel (1) by means of prefabricated brackets and post-installed anchor bolts. The evacuation platform includes a horizontal evacuation platform (16) and an oblique evacuation platform (17). The prefabricated box-shaped steel member (10) is connected to the horizontal evacuation platform (16) via the oblique evacuation platform (17).

3. The construction method of the tunnel and cross passage connection system based on the multi-bin box-type structure according to claim 2 is characterized in that: The height difference between the horizontal evacuation platform (16) and the rail surface is 850 to 900 mm.

4. The construction method of the tunnel and cross passage connection system based on the multi-bin box-type structure according to claim 2 is characterized in that: The inclined evacuation platform (17) is longitudinally connected to the prefabricated box-shaped steel member (10), and the slope of the inclined evacuation platform (17) along the longitudinal direction of the tunnel (1) is 5% to 10%.

5. The construction method of the tunnel and cross passage connection system based on the multi-bin box-type structure according to claim 1 is characterized in that: The prefabricated box-shaped steel member (10) is located at the bottom of the tunnel (1) at the opening of the transverse passage (2), and a plain concrete cushion layer is provided at the junction of the prefabricated box-shaped steel member (10) and the bottom of the tunnel (1).

6. The construction method of the tunnel and cross passage connection system based on the multi-compartment box-type structure according to claim 1 is characterized in that: The evacuation platform and the prefabricated box-shaped steel member (10) do not intrude into the train running profile (3), and a safety margin is provided.

7. The construction method of the tunnel and cross passage connection system based on the multi-bin box-type structure according to claim 1 is characterized in that: The prefabricated box-shaped steel components (10) are arranged in a stepped manner along the direction of the transverse passage (2), and the height difference between the steps is 100 to 200 mm.

8. The construction method of the tunnel and cross passage connection system based on the multi-compartment box-type structure according to claim 1 is characterized in that: The prefabricated box-shaped steel member (10) is connected to the bottom plate of the transverse passage (2) in a continuous manner, and the top of the prefabricated box-shaped steel member (10) is at the same elevation as the bottom plate of the transverse passage (2).

Images