Safety operation design method suitable for tunnel undercrossing railway container hoisting area

Abstract

The invention provides a safe operation design method suitable for a tunnel undercrossing railway container hoisting area, and relates to the field of railway operation. Comprising the steps that a freight rail is reinforced within the under-crossing influence range of the shallow-buried tunnel, and the hoisting operation of a gantry crane is adjusted to the area outside the under-crossing influence range; the container positions in the underpass influence range are re-arranged to a stable area outside the underpass influence range, and a container stacking area is formed; the freight train arriving at the container position is decompiled, and a truck is dragged to the stable area by a locomotive to be loaded and unloaded; taking the cast-in-situ bored piles as fulcrums, and erecting steel beams on the fulcrums to form an overhead system; and after the gantry crane running rail in the area where the overhead system is located is transferred and fixed to the overhead system, container hoisting operation in the area of the gantry crane running rail is recovered. According to the construction method, tunnel construction settlement is isolated by constructing the overhead system, and parallel operation of tunnel construction and station yard operation is achieved.

Description

Technical Field

[0001] This invention relates to the field of railway operations, and more specifically, to a safe operation design method applicable to a tunnel passing under a railway container hoisting area. Background Technology

[0002] With the construction of municipal and rail transit networks, some municipal and subway tunnels will pass under container loading areas. When municipal tunnels pass under existing operational container handling areas, due to their shallow burial depth, using the open-cut method would require traffic diversion in the container handling area and occupy a large amount of container production and operation space, severely impacting the production and operation of the container terminal. Using shield tunneling or rectangular pipe jacking methods is problematic because, firstly, it is hindered by the pile foundations beneath the gantry crane's running rails, making passage impossible; secondly, it could cause surface subsidence or uplift, leading to uneven settlement of the gantry crane's running rails in the container loading area, thereby endangering operational safety in the container loading area. Summary of the Invention

[0003] The purpose of this invention is to provide a safe operation design method suitable for tunnels passing under railway container hoisting areas, thereby improving the aforementioned problems. To achieve the above objective, the technical solution adopted by this invention is as follows:

[0004] This invention proposes a safe operation design method applicable to container hoisting areas under railway tunnels, comprising:

[0005] During the maintenance window for freight train operations, the freight tracks are reinforced within the area affected by the shallow-buried tunnel, and the hoisting operations of the gantry crane are adjusted to areas outside the affected area.

[0006] The container positions located within the underpass's influence area are reassigned to a stable area outside the underpass's influence area to form a container stacking area;

[0007] The freight trains arriving at the container positions are unloaded, and the locomotives pull the freight cars to the stable area for loading and unloading operations.

[0008] Within the area affected by the underpass, bored piles are used as fulcrums, and steel beams are erected on the fulcrums to form an overhead system;

[0009] After transferring and fixing the gantry crane's travel rails in the area where the overhead system is located to the overhead system, container hoisting operations in the area of ​​the gantry crane's travel rails and excavation operations of the shallow-buried tunnels are resumed.

[0010] Furthermore, the freight rails are reinforced using a rail-fastening reinforcement method.

[0011] Furthermore, the reassignment of container positions located within the underpass influence area to a stable area outside the underpass influence area includes:

[0012] By dynamically managing the container stacking location, hoisting operations are isolated outside the area affected by the underpass, forming a container stacking area.

[0013] Furthermore, the process of unloading and reassembling freight trains arriving at the container location includes:

[0014] After some freight cars are uncoupled and unloaded in the stable area, the remaining freight cars are towed by a locomotive to continue to the subsequent container positions in the stable area for operation.

[0015] Furthermore, the overhead system includes, from bottom to top, bored piles, a reinforced concrete foundation, and a steel beam; wherein the steel beam is erected on the reinforced concrete foundation.

[0016] Furthermore, the steel beams consist of multiple sets of rail-bearing steel longitudinal beams arranged along the travel direction of the gantry crane.

[0017] Furthermore, the bored piles are arranged in pairs in a direction parallel to the traveling rails of the gantry crane.

[0018] Furthermore, the step of transferring and fixing the gantry crane's traveling rails in the area where the overhead system is located to the overhead system includes:

[0019] The steel beams are assembled on the outside of the gantry crane's traveling rails;

[0020] Remove the existing running track foundation below the pre-installed position of the steel beam;

[0021] The assembled steel beam is moved laterally to the predetermined installation position;

[0022] The gantry crane travel rail is fixedly installed on the steel beam after it is in place.

[0023] Furthermore, after the gantry crane's traveling rails are fixedly installed on the steel beams, the process also includes:

[0024] Shear keys are installed on the steel beams and concrete is poured to combine the steel beams and concrete to form an integral load-bearing structure.

[0025] Furthermore, after the shallow-buried tunnel construction is completed, the road surface of the construction area is restored according to preset standards.

[0026] The beneficial effects of this invention are:

[0027] This invention constructs a permanent overhead system consisting of bored piles, reinforced concrete foundations, and steel beams. This system directly transfers the gantry crane load to deep, stable strata, thereby fundamentally isolating the surface settlement caused by shallow tunnel construction. This ensures that the container gantry crane above can operate safely and without interruption throughout the entire tunnel excavation process. Furthermore, by reinforcing the rails with locking mechanisms to ensure train passage safety, and combining dynamic container repositioning with freight train decoupling operations, lifting activities are precisely confined outside the settlement-affected zone, minimizing disruption to station operations.

[0028] Other features and advantages of the invention will be set forth in the following description, and in part will be obvious from the description or may be learned by practicing the embodiments of the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0029] Figure 1 This is a flowchart illustrating a safe operation design method applicable to container hoisting areas under railway tunnels in this embodiment.

[0030] Figure 2 This is a schematic cross-sectional view of the container hoisting area under the railway tunnel in this embodiment;

[0031] Figure 3 This is a schematic longitudinal section of the container hoisting area under the railway tunnel in this embodiment;

[0032] Figure 4 This is a schematic diagram of freight train decoupling applicable to the container loading area of ​​a railway tunnel under the tunnel in this embodiment;

[0033] Figure 5 This is a schematic diagram of container operations during tunnel underpass construction after the gantry crane's traveling rail reinforcement is completed in this embodiment;

[0034] Marked in the image:

[0035] 1-Gantry crane traveling rail; 2-Steel beam; 3-Reinforced concrete foundation; 4-Drilled pile; 5-Shallow tunnel; 6-Freight train; 7-Container stacking area; 8-Freight rail; 9-Gantry crane. Detailed Implementation

[0036] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Example 1:

[0040] like Figure 1 and Figure 5 As shown, a safe operation design method applicable to container hoisting areas under railway tunnels includes:

[0041] S1. During the maintenance window for freight train operation, the freight track 8 is reinforced within the influence range of the shallow buried tunnel 5, and the hoisting operation of the gantry crane 9 is adjusted to an area outside the influence range of the tunnel.

[0042] Preferably, a 3-5-3 type rail fastening reinforcement method is used to reinforce the freight track 8. During construction, several steel rails are fastened onto the existing freight track 8, and the old and new rails are firmly connected by fasteners and rail clips to form a composite track structure. This effectively disperses the load that may be caused by tunnel construction, enhances the rigidity and stability of the track, and ensures that freight trains can still pass safely at a temporarily limited speed if uneven settlement occurs during subsequent construction. At the same time, based on the predicted range of surface settlement caused by tunnel construction, the boundary of the "underpass influence area" is marked on site. Subsequently, all lifting operations of the gantry crane 9, including lifting, traveling, and stacking, are adjusted to a safe area outside the underpass influence area.

[0043] Based on the above embodiments, this method further includes:

[0044] S2. The container positions located within the underpass influence range are reassigned to a stable area outside the underpass influence range to form a container stacking area 7;

[0045] Specifically, by dynamically managing the container stacking location, hoisting operations are isolated outside the area affected by the underpass, forming container stacking area 7.

[0046] Based on the above embodiments, this method further includes:

[0047] S3. The freight train 6 that has arrived at the container position is unloaded and the locomotive pulls the freight cars to the stable area for loading and unloading operations;

[0048] Specifically, step S3 includes:

[0049] Freight train 6 proceeds to the designated container position at the beginning of the stable area. The locomotive uncouples from some of the following freight cars, separating the train. The detached freight cars remain in place, where gantry crane 9 performs loading and unloading operations. Simultaneously, the locomotive pulls the remaining freight cars that have not been detached, continuing forward to the next or subsequent designated container position in the stable area, repeating the above detachment and loading / unloading process until all freight train 6 has been separated into its corresponding container positions and the loading and unloading operations have been completed.

[0050] Based on the above embodiments, this method further includes:

[0051] S4. Within the area affected by the underpass, the bored pile 4 is used as a fulcrum, and a steel beam 2 is erected on the fulcrum to form an overhead system;

[0052] Specifically, the overhead system includes, from bottom to top, bored piles 4, reinforced concrete pile caps 3, and steel beams 2; wherein, the steel beams 2 are erected on the reinforced concrete pile caps 3;

[0053] Specifically, the steel beam 2 consists of multiple sets of rail-bearing steel longitudinal beams arranged along the direction of the gantry crane's traveling rail 1. Preferably, its span arrangement is 15+18+18+15m, the national standard steel type used is I120, the number of combinations is three pieces, and the beam's cross-sectional height is 1.2m.

[0054] Specifically, the bored piles 4 are arranged in pairs in a direction parallel to the gantry crane travel rail 1. The diameter of the bored piles 4 is 1.5m, and two piles are used in the transverse rail direction with a pile spacing of 6.5m.

[0055] First, on both sides of the shallow-buried tunnel 5, in a direction parallel to the gantry crane's traveling rail 1, pairs of bored piles 4 are constructed as vertical support points. In this embodiment, a rotary drilling rig is used for drilling, and the pile body is constructed of reinforced concrete to ensure sufficient vertical bearing capacity and stability.

[0056] Subsequently, the reinforced concrete pile cap 3 was constructed on top of the completed bored pile 4.

[0057] Finally, the steel beams 2 are erected. Preferably, the steel beams 2 are multiple sets of longitudinal steel beams arranged along the gantry crane's traveling rail 1. These steel beams 2 are hoisted and fixed onto the pre-cast reinforced concrete foundation 3, thus forming an overhead system together with the pile foundation and foundation. This overhead system transforms the existing ground-bearing mode into an overhead bearing system, providing a fundamental guarantee for subsequent tunnel construction without affecting operations above.

[0058] Based on the above embodiments, this method further includes:

[0059] S5. After transferring and fixing the gantry crane travel rail 1 in the area where the overhead system is located to the overhead system, resume the container hoisting operation in the area of ​​the gantry crane travel rail 1 and the excavation operation of the shallow buried tunnel 5;

[0060] Specifically, such as Figure 5 As shown, step S5 includes:

[0061] S51. Assemble the steel beam 2 on the outside of the gantry crane traveling rail 1;

[0062] S52. Remove the existing running track foundation below the preset installation position of the steel beam 2;

[0063] S53. Move the assembled steel beam 2 laterally to the predetermined installation position;

[0064] S54. Fix the gantry crane traveling rail 1 onto the steel beam 2 after it is in place;

[0065] Preferably, to enhance the durability and integrity of the structure, after fixing the gantry crane travel rail 1, shear keys are installed on the steel beam 2 and concrete is poured, so that the steel beam 2 and the concrete are combined to form an integral load-bearing structure.

[0066] After completing the aforementioned track conversion and structural reinforcement, container hoisting operations resumed in the area of ​​gantry crane travel rail 1. At this time, the tunnel boring machine or excavating equipment of shallow-buried tunnel 5, protected by the established overhead system, began its underground excavation operation, achieving parallel and safe construction of above-ground hoisting and underground excavation.

[0067] Based on the above embodiments, this method further includes:

[0068] After the shallow buried tunnel 5 is completed, the road surface of the construction area is restored according to the preset standards.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0070] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A safe operation design method applicable to container hoisting areas under railway tunnels, characterized in that, include: During the operation window of the freight train, the freight track (8) is reinforced within the influence range of the shallow buried tunnel (5), and the hoisting operation of the gantry crane (9) is adjusted to an area outside the influence range of the tunnel. The container positions located within the underpass influence area are reassigned to a stable area outside the underpass influence area to form a container stacking area (7); The freight train (6) that arrives at the container position is unloaded and the freight car is pulled by a locomotive to the stable area for loading and unloading operations; Within the area affected by the underpass, bored piles (4) are used as fulcrums, and steel beams (2) are erected on the fulcrums to form an overhead system; After transferring and fixing the gantry crane travel rail (1) in the area where the overhead system is located to the overhead system, the container hoisting operation in the area of ​​the gantry crane travel rail (1) and the excavation operation of the shallow buried tunnel (5) are resumed.

2. The safe operation design method for container hoisting areas under railway tunnels according to claim 1, characterized in that, The freight track (8) was reinforced by using a rail-fastening reinforcement method.

3. The safe operation design method for container hoisting areas under railway tunnels as described in claim 1, characterized in that, The step of reassigning container positions located within the underpass's influence area to a stable area outside the underpass's influence area includes: By dynamically managing the container stacking location, hoisting operations are isolated outside the area affected by the underpass, forming a container stacking area (7).

4. The safe operation design method for container hoisting areas under railway tunnels according to claim 1, characterized in that, The process of unloading and reassembling freight trains (6) that have arrived at their container locations includes: After some freight cars of the freight train (6) are uncoupled and unloaded in the stable area, the remaining freight cars are towed by a locomotive to continue to the subsequent container positions in the stable area for operation.

5. The safe operation design method for container hoisting areas under railway tunnels according to claim 1, characterized in that, The overhead system includes, from bottom to top, bored piles (4), reinforced concrete foundation (3) and steel beams (2); wherein the steel beams (2) are erected on the reinforced concrete foundation (3).

6. The safe operation design method for container hoisting areas under railway tunnels according to claim 5, characterized in that, The steel beam (2) consists of multiple sets of longitudinal steel beams that support the rails, arranged along the direction of the gantry crane's traveling rail (1).

7. The safe operation design method for container hoisting areas under railway tunnels according to claim 5, characterized in that, The bored piles (4) are arranged in pairs in a direction parallel to the traveling rail (1) of the gantry crane.

8. The safe operation design method for container hoisting areas under railway tunnels according to claim 1, characterized in that, The process of transferring and fixing the gantry crane travel rail (1) in the area where the overhead system is located to the overhead system includes: The steel beams (2) are assembled on the outside of the gantry crane's traveling rails (1); Remove the existing running track foundation below the preset installation position of the steel beam (2); The assembled steel beam (2) is moved laterally to the predetermined installation position; The gantry crane travel rail (1) is fixedly installed on the steel beam (2) after it is in place.

9. The safe operation design method for container hoisting areas under railway tunnels according to claim 8, characterized in that, After the gantry crane traveling rail (1) is fixedly installed on the steel beam (2), the following is also included: Shear keys are installed on the steel beam (2) and concrete is poured to combine the steel beam (2) with the concrete to form an integral load-bearing structure.

10. The safe operation design method for container hoisting areas under railway tunnels according to claim 1, characterized in that, After the shallow-buried tunnel (5) is completed, the road surface of the construction area is restored according to the preset standards.

Images