An integrated inverted arch trestle escape passage

Abstract

This utility model provides an integrated escape passage for an arch bridge, specifically relating to the field of tunnel construction technology. It addresses the technical problem that escape passages typically require additional construction after the arch bridge is erected, leading to increased workload and reduced tunnel construction efficiency. The device includes an integrated load-bearing frame, multi-layered fixed escape chambers, and a modular emergency ladder. The main body of the bridge is located above the integrated load-bearing frame, with one end fixedly supported at the top of the constructed arch within the tunnel, and the other end extending downwards towards the working face into the pit. Two multi-layered fixed escape chambers are provided, each located on top of the integrated load-bearing frame and symmetrically arranged on both sides of the main body of the bridge. By deeply integrating the structure of the escape passage with the load-bearing frame, spatial layout, and construction process of the arch bridge, this device eliminates redundant steps in the additional construction of escape passages, thereby improving tunnel construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and more specifically, to an integrated inverted arch bridge escape passage. Background Technology

[0002] An invert arch trestle bridge is a special bridge structure mainly used for the construction of invert arches in railway and highway tunnel projects. It combines the functions of a trestle bridge and invert arch support, allowing for simultaneous material transport during tunnel excavation and invert arch construction, minimizing construction interference. As the invert arch construction progresses, the trestle bridge advances closely alongside the tunnel excavation front (face), positioned between the foundation pit and the already constructed arch, and erected above the section of the invert arch to be constructed. Furthermore, to ensure the safety of construction personnel, an external escape route needs to be constructed near the foundation pit at the face of the tunnel, running parallel to both the excavation and the external escape route on the tunnel cross-section.

[0003] However, escape routes usually need to be erected separately after the arch bridge is built, which increases the amount of construction work and reduces the efficiency of tunnel construction. Utility Model Content

[0004] The purpose of this utility model is to provide an integrated escape passage for an arch bridge. It adopts an integrated design of the escape passage and the arch bridge, so that the escape passage can be erected simultaneously when the arch bridge is erected, which effectively reduces the efficiency of tunnel construction.

[0005] The embodiments of this utility model are achieved through the following technical solutions:

[0006] An integrated arch bridge escape passage includes an integrated load-bearing frame, multi-layer fixed escape cabins, and modular emergency ladders. The main body of the bridge is located above the integrated load-bearing frame, with one end fixedly supported on the top of the arched ground inside the tunnel, and the other end extending downwards towards the working face into the foundation pit. Two multi-layer fixed escape cabins are provided, each located on top of the integrated load-bearing frame and symmetrically arranged on both sides of the main body of the bridge.

[0007] In some embodiments, each of the multi-layer fixed escape pods includes two single-layer escape pods arranged along the height direction of the main body of the trestle bridge. The upper single-layer escape pod is provided with a ladder connected to the pit at one end closer to the working face. Multiple emergency exits are arranged at intervals on the outer side of the single-layer escape pod. The modular emergency ladder is provided corresponding to the emergency exits and is used to connect the bottom of the tunnel with the emergency exits.

[0008] In some embodiments, the integrated load-bearing frame is connected to the main body of the trestle as a single structure, and a support frame is detachably connected to the bottom of the inclined portion of the integrated load-bearing frame; the outer side of the integrated load-bearing frame is provided with a wear-resistant and corrosion-resistant coating, the inside is covered with an anti-slip and anti-rust layer, a dustproof baffle is provided at the gap between the top and the main body of the trestle, and a drainage hole with an automatic sealing valve is provided at the bottom.

[0009] In some embodiments, the emergency exit includes an outward-folding sealing cover; the top edge of the sealing cover is connected to the outside of the fixed escape pod via a spring hinge, and an electromagnetic lock is provided on the outside of the sealing cover.

[0010] In some embodiments, each of the single-layer escape pods has a straight passageway inside, the floor surface of which is paved with anti-slip patterned steel plates, and emergency lighting lights are installed at intervals on the top of the straight passageway.

[0011] In some embodiments, the modular emergency ladder includes a hydraulic folding ladder and a storage slot; the storage slot is embedded in the surface of a multi-layer fixed escape capsule and is positioned directly below the emergency exit; the top of the hydraulic folding ladder is connected to the interior of the storage slot.

[0012] In some embodiments, the hydraulic folding ladder is made of aluminum alloy, and the surface of the steps of the hydraulic folding ladder is provided with anti-slip texture.

[0013] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0014] 1. This device deeply integrates the structure of the escape passage with the load-bearing frame, spatial layout, and construction process of the arch bridge, enabling one-time erection, simultaneous use, and simultaneous advancement. This fundamentally eliminates redundant steps in the additional erection of the escape passage, reduces the workload of construction, and improves the efficiency of tunnel construction. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model 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.

[0016] Figure 1 A side view of an integrated arched trestle bridge escape passage provided in an embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of an integrated arch bridge escape passage provided in an embodiment of this utility model.

[0018] Icons: 1. Integrated load-bearing frame; 2. Multi-layer fixed escape pods; 3. Main body of the trestle bridge; 4. Emergency exit / exit; 5. Support frame; 6. Drainage outlet; 7. Sealing cover; 8. Hydraulic folding ladder; 9. Storage slot. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] 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.

[0021] It should be noted that similar labels 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.

[0022] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Please see Figures 1-2As shown, the main body of this embodiment is an integrated arch bridge escape passage, including an integrated load-bearing frame 1, multi-layer fixed escape cabins 2, and modular emergency ladders; the integrated load-bearing frame 1 is provided with a bridge body 3 above it, with one end fixedly supported on the top of the arched ground inside the tunnel, and the other end extending downwards towards the working face into the pit; there are two multi-layer fixed escape cabins 2, each of which is located on the top of the integrated load-bearing frame 1 and symmetrically arranged on both sides of the bridge body 3.

[0025] Furthermore, each of the multi-layer fixed escape pods includes two single-layer escape pods arranged along the height direction of the main body 3 of the trestle bridge. The upper single-layer escape pod has a ladder connected to the pit at one end near the working face. The ladder is located on the side of the single-layer escape pod to prevent obstruction of the passage of the main body 3 of the trestle bridge. Multiple emergency exits 4 are arranged at intervals on the outer side of the single-layer escape pod. The modular emergency ladder is arranged corresponding to the emergency exits 4 and is used to connect the bottom of the tunnel with the emergency exits 4.

[0026] Furthermore, the integrated load-bearing frame 1 is connected to the main body of the trestle bridge as a single structure, and the bottom of the inclined part of the integrated load-bearing frame 1 is detachably connected to a support frame 5; the outer side of the integrated load-bearing frame 1 is provided with a wear-resistant and anti-corrosion coating, the inside is covered with an anti-slip and anti-rust layer, a dustproof baffle is provided at the gap between the top and the main body of the trestle bridge 3, and a drainage hole with an automatic sealing valve is provided at the bottom.

[0027] Furthermore, the emergency exit 4 includes an outward-folding sealing cover 7; the top edge of the sealing cover 7 is connected to the outside of the fixed escape pod via a spring hinge, and an electromagnetic lock is provided on the outside of the sealing cover 7.

[0028] Furthermore, each of the single-layer escape pods has a straight passageway inside, the floor surface of which is paved with anti-slip patterned steel plates, and emergency lighting lights are installed at intervals on the top of the straight passageway.

[0029] Furthermore, the modular emergency ladder includes a hydraulic folding ladder 8 and a storage slot 9; the storage slot 9 is embedded in the surface of the multi-layer fixed escape capsule 2 and is set directly below the emergency exit 4; the top of the hydraulic folding ladder 8 is connected to the emergency exit 4 by a hinge, and is normally folded and stored in the storage slot 9, with a cover plate flush with the ground at the slot opening.

[0030] Furthermore, the hydraulic folding ladder 8 is made of aluminum alloy, and the surface of the steps of the hydraulic folding ladder 8 is provided with anti-slip texture.

[0031] This device integrates the core structure of the escape passage (multi-layered fixed escape pods 2) directly into the load-bearing frame of the arched trestle bridge. It utilizes the trestle bridge's own load-bearing structure (rather than a separate foundation) as the support for the escape passage, eliminating the need for additional foundation excavation and independent support frame construction. This fundamentally reduces the construction steps required for separately erecting the escape passage foundation. Furthermore, the integrated load-bearing frame 1 supports the existing arched ground at one end and extends to the foundation pit at the other, simultaneously fulfilling the material transport function of the trestle bridge and the evacuation route requirements of the escape passage, achieving "one structure, multiple uses" and avoiding redundant construction.

[0032] Secondly, when the arch bridge is erected, the multi-layer fixed escape cabin 2 can be installed simultaneously with the main body of the bridge 3 (e.g., fixed to the integrated load-bearing frame 1 by bolts). There is no need to wait until the bridge is erected before separately hoisting and splicing the escape passage cabins, which reduces the step-by-step construction process of first erecting the bridge and then erecting the escape passage, and shortens the overall construction period.

[0033] Modular emergency ladders enable workers located directly beneath the invert arch trestle, in the section where the invert arch is to be constructed, to quickly and easily access multi-level fixed escape cabins. Furthermore, as a key component of the escape route, the modular emergency ladder is not installed separately after the trestle is erected, but rather prefabricated and integrated into the surface of the escape cabin (stored within a pre-designed storage slot 9), manufactured and installed on the trestle simultaneously with the escape cabin. When the main trestle 3 is moved as the tunnel project progresses, the modular emergency ladder can be stored away, remaining deployed for use during construction, providing immediate emergency response and eliminating the extra steps of separately transporting and installing the emergency ladder later.

[0034] As the arch bridge advances with the working face, the integrated load-bearing frame 1 (including the multi-layered fixed escape chambers 2 on both sides) can move and adjust its position synchronously. The new position only needs to be fixed by the detachable support frame 5, eliminating the need for separate disassembly, relocation, and re-erection of the escape passage. This allows the bridge's advancement to be completed simultaneously with the escape passage's advancement, avoiding the repetitive work of relocating and separately erecting escape passages after the bridge is moved forward, as is common in traditional methods, significantly improving construction efficiency.

[0035] In summary, this device achieves "one-time erection, simultaneous use, and simultaneous advancement" by deeply integrating the structure of the escape passage (escape chamber, emergency ladder) with the load-bearing frame, spatial layout, and construction process of the arch bridge. This fundamentally eliminates redundant steps in the additional erection of the escape passage, reduces the workload of construction, and improves the efficiency of tunnel construction.

[0036] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An integrated inverted arch bridge escape passage, characterized in that, It includes an integrated load-bearing frame (1), multi-layer fixed escape pods (2), and modular emergency ladders; the integrated load-bearing frame (1) is equipped with a trestle body (3) on top, with one end fixedly supported on the top of the arched ground in the tunnel, and the other end extending downwards towards the working face into the pit; there are two multi-layer fixed escape pods (2), each of which is located on the top of the integrated load-bearing frame (1) and is symmetrically arranged on both sides of the trestle body (3).

2. The integrated arched trestle bridge escape passage according to claim 1, characterized in that, Each of the multi-layer fixed escape pods (2) includes two single-layer escape pods arranged along the height direction of the main body of the trestle bridge (3). The upper single-layer escape pod is provided with a ladder connected to the pit at one end closer to the working face. Multiple emergency exits (4) are arranged at intervals on the outer side of the single-layer escape pod. The modular emergency ladder is provided corresponding to the emergency exits (4) and is used to connect the bottom of the tunnel with the emergency exits (4).

3. The integrated arched trestle bridge escape passage according to claim 1, characterized in that, The integrated load-bearing frame (1) is connected to the main body of the trestle (3) as an integral structure. The bottom of the inclined part of the integrated load-bearing frame (1) is detachably connected to a support frame (5). The outer side of the integrated load-bearing frame (1) is provided with a wear-resistant and anti-corrosion coating, and the inside is covered with an anti-slip and anti-rust layer. A dustproof baffle is provided at the gap between the top and the main body of the trestle (3), and a drainage hole with an automatic sealing valve is provided at the bottom.

4. The integrated arched trestle bridge escape passage according to claim 2, characterized in that, The emergency exit (4) includes an outward-folding sealing cover (7); the top edge of the sealing cover (7) is connected to the outside of the fixed escape pod via a spring hinge, and an electromagnetic lock is provided on the outside of the sealing cover (7).

5. The integrated arched trestle bridge escape passage according to claim 2, characterized in that, Each of the single-layer escape pods has a straight passageway inside, with the floor surface of the straight passageway covered with anti-slip patterned steel plates, and emergency lighting lights installed at intervals on the top of the straight passageway.

6. The integrated arched trestle bridge escape passage according to claim 2, characterized in that, The modular emergency ladder includes a hydraulic folding ladder (8) and a storage slot (9); the storage slot (9) is embedded in the surface of the multi-layer fixed escape capsule (2) and is set directly below the emergency exit (4); the top of the hydraulic folding ladder (8) is connected to the inside of the storage slot (9).

7. The integrated arched trestle bridge escape passage according to claim 6, characterized in that, The hydraulic folding ladder (8) is made of aluminum alloy, and the surface of the steps of the hydraulic folding ladder (8) is provided with anti-slip texture.

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