Tunnel sleeve arch structure

Abstract

The utility model provides a tunnel cover arch structure, including inside arch support structure, intermediate arch support subassembly, outside arch support structure and be used for the hole mouth pipe subassembly of setting up pipe shed, inside arch support structure erects in the outside of open cut lining structure, outside arch support structure erects in the outside of inside arch support structure, inside arch support structure and outside arch support structure are connected, the hole mouth pipe subassembly is connected in the outer wall of outside arch support structure, the outer wall of inside arch support structure forms has the first placement slot of the intermediate arch support subassembly placement, the inner wall of outside arch support structure forms has the second placement slot of the intermediate arch support subassembly placement, second placement slot and first placement slot one to one correspondence arrangement, the intermediate arch support subassembly places between first placement slot and second placement slot. The present application has the advantages of convenient and efficient construction, steel can be recycled, greatly reduces the loss.

Description

Technical Field

[0001] This utility model relates to the field of tunnel technology, and in particular to a tunnel arch structure. Background Technology

[0002] The tunnel portal pipe roof arch is the core load-bearing structure in the pipe roof support system. It is located on the tunnel portal end wall or the outer edge of the open tunnel and is used to accurately position the pipe roof steel pipes, transfer loads, and enhance the overall integrity.

[0003] In existing technologies, tunnel arch construction typically employs an 80cm thick C30 concrete structure, with I20a I-beams installed inside. Φ127 borehole pipes are then fixed to these I-beams for pipe roof installation. This arch construction method requires formwork erection and in-situ concrete pouring, making the process cumbersome and time-consuming, significantly impacting tunnel construction progress. Furthermore, the arch is usually dismantled during open-cut tunnel lining, resulting in substantial material waste.

[0004] Therefore, it is necessary to propose a tunnel arch structure to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0005] The main purpose of this utility model is to provide a tunnel arch structure to solve the technical problems of existing tunnel arch structures, which require cast-in-place concrete, resulting in long construction cycles and low efficiency.

[0006] To achieve the above objectives, this utility model provides a tunnel arch structure, including an inner arch support structure, a middle arch support assembly, an outer arch support structure, and an orifice pipe assembly for installing a pipe roof. The inner arch support structure is erected on the outside of the open-cut tunnel lining structure, and the outer arch support structure is erected on the outside of the inner arch support structure. The inner arch support structure and the outer arch support structure are connected at their ends, and the orifice pipe assembly is connected to the outer wall of the outer arch support structure.

[0007] The outer wall of the inner arched support structure has a first placement groove for placing the middle arched support component, and the inner wall of the outer arched support structure has a second placement groove for placing the middle arched support component. The second placement groove and the first placement groove are arranged in a one-to-one correspondence, and the middle arched support component is placed between the first placement groove and the second placement groove.

[0008] Preferably, both the inner arched support structure and the outer arched support structure are corrugated steel plates, and the first placement groove and the second placement groove are corrugated grooves of corrugated steel plates.

[0009] Preferably, the inner arched support structure includes a first corrugated steel plate body, a first connecting plate and a second connecting plate arranged opposite to each other along the tunnel extension direction, the first connecting plate and the second connecting plate being connected to both ends of the first corrugated steel plate body; the outer arched support structure includes a second corrugated steel plate body, a third connecting plate and a fourth connecting plate arranged opposite to each other along the tunnel extension direction, the third connecting plate and the fourth connecting plate being connected to both ends of the second corrugated steel plate body;

[0010] The first connecting plate and the third connecting plate are detachably connected, and the second connecting plate and the fourth connecting plate are detachably connected.

[0011] Preferably, the first connecting plate, the second connecting plate, the third connecting plate, and the fourth connecting plate are all L-shaped connecting plates, and the L-shaped connecting plate includes horizontal plates and vertical plates that are connected to each other;

[0012] The first connecting plate has a first connecting hole for bolts to pass through on its horizontal plate, and the third connecting plate has a third connecting hole that corresponds to the first connecting hole on its horizontal plate. The first connecting plate is connected to the third connecting plate by bolts passing through the first connecting hole and the third connecting hole.

[0013] The second connecting plate has a second connecting hole for bolts to pass through on its horizontal plate, and the fourth connecting plate has a fourth connecting hole that corresponds to the second connecting hole. The second connecting plate is connected to the fourth connecting plate by bolts passing through the second connecting hole and the fourth connecting hole.

[0014] Preferably, the intermediate arch support assembly includes multiple I-beams spaced apart along the tunnel extension direction, the bottom of the corrugated groove is flat, the outer side plate of the I-beam is embedded in the second placement groove, and the inner side plate of the I-beam is embedded in the first placement groove.

[0015] Preferably, the orifice pipe assembly includes multiple orifice pipes spaced apart along the circumferential direction of the tunnel, and each orifice pipe is connected to the outer wall of the outer arch support structure.

[0016] Preferably, the orifice pipe is connected to the outer wall of the outer arched support structure via a fixed reinforcing bar.

[0017] Preferably, the vertical plate of the first connecting plate is disposed outside the vertical plate of the third connecting plate, and the vertical plate of the second connecting plate is disposed outside the vertical plate of the fourth connecting plate.

[0018] Preferably, the assembly further includes a pad assembly disposed between the orifice pipe assembly and the outer arched support structure. The pad assembly includes a plurality of pads that are arranged one-to-one with the I-beams, and the height of the plurality of pads gradually increases from the open opening to the closed opening, so that the orifice pipe is inclined upward.

[0019] Preferably, it also includes a mortise arch foundation assembly, which is located at the arch foot and is used for overlapping the bottom of the inner arch support structure and the bottom of the outer arch support structure.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] This utility model provides a tunnel arch structure, including an inner arch support structure, a middle arch support component, an outer arch support structure, and an orifice pipe component for installing a pipe roof. The combined structure of this application can fully utilize the load-bearing capacity of each component. The middle arch support component is embedded in the first and second placement slots, transferring the load bidirectionally to the inner and outer arch frames, fully utilizing the supporting role of the middle arch support component. The combined structure is further secured by the end connections of the outer and inner arch support structures, ensuring structural stability. The combined structure of this application is entirely made of steel, allowing for on-site assembly and bolt fixing, making construction convenient and efficient. Furthermore, when the arch needs to be dismantled after pipe roof construction, it can be dismantled manually, and the steel can be recycled, greatly reducing waste and thus lowering carbon emissions. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is an application scenario diagram of the overall structure in one embodiment of the present utility model;

[0024] Figure 2 for Figure 1 Enlarged diagram of point B in the image;

[0025] Figure 3 for Figure 1 A cross-sectional view of point AA in the diagram.

[0026] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0027] Explanation of icon numbers:

[0028] 10. Inner arched support structure; 110. First placement slot; 120. First corrugated steel plate main body; 130. First connecting plate; 140. Second connecting plate; 20. Middle arched support assembly; 210. I-beam; 30. Outer arched support structure; 310. Second placement slot; 320. Second corrugated steel plate main body; 330. Third connecting plate; 340. Fourth connecting plate; 350. Bolt; 40. Orifice pipe assembly; 410. Orifice pipe; 420. Fixing reinforcement; 50. Spacer block; 60. Arch foundation assembly; 70. Angle steel; 80. Open tunnel lining structure; 910. Initial support for closed tunnel; 920. Secondary lining of closed tunnel. Detailed Implementation

[0029] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0033] Please see Figures 1 to 3A tunnel arch structure provided in one embodiment of the present invention includes an inner arch support structure 10, a middle arch support component 20, an outer arch support structure 30, and an orifice pipe component 40 for constructing a pipe roof. The inner arch support structure 10 is erected on the outside of the open-cut tunnel lining structure 80, and the outer arch support structure 30 is erected on the outside of the inner arch support structure 10. The inner arch support structure 10 and the outer arch support structure 30 are connected at their ends, and the orifice pipe component 40 is connected to the outer wall of the outer arch support structure 30.

[0034] The outer wall of the inner arched support structure 10 has a first placement groove 110 for placing the middle arched support component 20, and the inner wall of the outer arched support structure 30 has a second placement groove 310 for placing the middle arched support component 20. The second placement groove 310 and the first placement groove 110 are arranged in a one-to-one correspondence, and the middle arched support component 20 is placed between the first placement groove 110 and the second placement groove 310.

[0035] In this application, the outer arched support structure 30 directly bears the surrounding rock pressure and the reaction force of the pipe roof drilling rig. By distributing the load to the arch foot, the middle arched support component 20 is embedded in the first placement groove 110 and the second placement groove 310 respectively, thus transferring the load bidirectionally to the inner and outer arch frames. The inner arched support structure 10 and the outer arched support structure 30 are connected at their ends, and the middle arched support component 20, together with the middle arched support component 20, form a rigid composite arch ring in the circumferential direction, which works together to resist the surrounding rock load and construction load.

[0036] The combined structure of this application adopts a steel structure, which can be assembled on site and fixed with 350 bolts. The construction is convenient and efficient. After the pipe roof is constructed, when it is necessary to remove the arch, it can be removed manually. The steel can be recycled, which greatly reduces losses and thus reduces carbon emissions.

[0037] Preferably, the inner arched support structure 10 and the outer arched support structure 30 are both corrugated steel plates, and the first placement groove 110 and the second placement groove 310 are corrugated grooves of corrugated steel plates.

[0038] In a preferred embodiment, the inner arched support structure 10 includes a first corrugated steel plate body 120, a first connecting plate 130 and a second connecting plate 140 arranged opposite to each other along the tunnel extension direction, wherein the first connecting plate 130 and the second connecting plate 140 are connected to both ends of the first corrugated steel plate body 120; the outer arched support structure 30 includes a second corrugated steel plate body 320, a third connecting plate 330 and a fourth connecting plate 340 arranged opposite to each other along the tunnel extension direction, wherein the third connecting plate 330 and the fourth connecting plate 340 are connected to both ends of the second corrugated steel plate body 320;

[0039] The first connecting plate 130 and the third connecting plate 330 are detachably connected, and the second connecting plate 140 and the fourth connecting plate 340 are detachably connected.

[0040] In this implementation, the corrugated steel plate main body possesses excellent bending stiffness and compressive stability, effectively resisting surrounding rock pressure and construction loads. The connection between the two main structures can be completed simply by tightening bolts 350, significantly shortening on-site installation time and improving construction efficiency. This combined structure fully utilizes the load-bearing capacity of each component; the central arched support component 20 is precisely positioned within the corrugated grooves of the corrugated steel plate, fully supporting the corrugated steel plate. Furthermore, the combined structure is further secured by bolts 350 between the double-layer corrugated steel plates, ensuring structural stability.

[0041] Furthermore, the first connecting plate 130, the second connecting plate 140, the third connecting plate 330, and the fourth connecting plate 340 are all L-shaped connecting plates, each L-shaped connecting plate comprising a horizontal plate and a vertical plate connected to each other; wherein, the horizontal plate of the first connecting plate 130 has a first connecting hole for a bolt 350 to pass through, and the horizontal plate of the third connecting plate 330 has a third connecting hole arranged one-to-one with the first connecting hole; the first connecting plate 130 is connected to the third connecting plate 330 by bolts 350 passing through the first connecting hole and the third connecting hole.

[0042] The second connecting plate 140 has a second connecting hole for the bolt 350 to pass through on its horizontal plate, and the fourth connecting plate 340 has a fourth connecting hole that corresponds to the second connecting hole. The second connecting plate 140 is connected to the fourth connecting plate 340 by the bolt 350 passing through the second connecting hole and the fourth connecting hole.

[0043] like Figure 3The first connecting plate 130 and the third connecting plate 330 are connected by bolts 350, and the second connecting plate 140 and the fourth connecting plate 340 are connected by bolts 350, which fixes the inner arched support structure 10 and the outer arched support structure 30 into a combined structure, ensuring the stability of the structure and greatly improving its resistance to surrounding rock pressure and construction loads.

[0044] In a preferred embodiment, the intermediate arch support assembly 20 includes multiple I-beams 210 spaced apart along the tunnel extension direction. The bottom of the corrugated groove is flat. The outer side plate of the I-beam 210 is embedded in the second placement groove 310, and the inner side plate of the I-beam 210 is embedded in the first placement groove 110.

[0045] like Figure 3 As shown, the I-beam 210 fits perfectly into the corrugated groove, fully utilizing its supporting function. The straight groove bottom design ensures that the outer and inner side plates (i.e., the flanges of the I-beam 210) are in surface contact with the corrugated groove. This allows the surrounding rock pressure or construction load to be evenly transferred to the inner arched support structure 10 and the outer arched support structure 30 through the flanges of the I-beam 210, avoiding stress concentration and improving the overall load-bearing capacity of the structure.

[0046] Furthermore, the orifice pipe assembly 40 includes multiple orifice pipes 410 spaced apart along the circumferential direction of the tunnel, and each orifice pipe 410 is connected to the outer side wall of the outer arch support structure 30.

[0047] Furthermore, the orifice pipe 410 is connected to the outer wall of the outer arched support structure 30 via a fixing reinforcing bar 420. The fixing reinforcing bar 420 stably connects the orifice pipe 410 to the outer wall of the outer arched support structure 30. The fixing reinforcing bar 420 can be welded to the outer wall of the outer arched support structure 30, or it can be detachably connected to the outer wall of the outer arched support structure 30, thus facilitating disassembly.

[0048] Furthermore, the vertical plate of the first connecting plate 130 is disposed outside the vertical plate of the third connecting plate 330, and the vertical plate of the second connecting plate 140 is disposed outside the vertical plate of the fourth connecting plate 340. For example... Figure 3 As shown, the vertical plate of the first connecting plate 130 is located outside the vertical plate of the third connecting plate 330, and the vertical plate of the second connecting plate 140 is located outside the vertical plate of the fourth connecting plate 340. This structural form can, to a certain extent, prevent external water from directly entering between the outer arched support structure 30 and the inner arched support structure 10.

[0049] In a preferred embodiment, a pad assembly is further included between the orifice pipe assembly 40 and the outer arched support structure 30. The pad assembly includes multiple pads 50 corresponding one-to-one with the I-beams 210, and the height of the multiple pads 50 gradually increases from the open opening to the closed opening, so that the orifice pipe 410 is inclined upwards. Furthermore, as... Figure 3 As shown, the inner arched support structure 10 is erected on the outside of the open-cut tunnel lining structure 80. One end of the inner arched support structure 10 and the outer arched support structure 30 is located close to the secondary lining 920 of the dark tunnel. The positional relationship between the secondary lining 920 and the initial support 910 of the dark tunnel is as follows: Figure 3 As shown. Those skilled in the art will understand that, in actual pipe roof installation, it is often necessary to tilt the pipe roof upwards to ensure it is driven into the surrounding rock in front of the tunnel at a certain angle, forming an "umbrella-shaped" or "fan-shaped" structure for advanced support. In this embodiment, by setting multiple pads 50 of gradually increasing height (from the open tunnel side to the closed tunnel side) between the orifice pipe assembly 40 and the outer arched support structure 30, it is ensured that the pipe roof driven through the orifice pipe 410 meets the angle requirements.

[0050] Preferably, the system further includes a truss foundation assembly 60, which is located at the arch foot and serves as a connection point for the bottom of the inner arch support structure 10 and the bottom of the outer arch support structure 30. Preferably, arch foot foundation assemblies are provided on both sides of the tunnel. Further, angle steel 70 can be provided as a connecting structure at the bottom of the inner arch support structure 10 and the bottom of the outer arch support structure 30, and the angle steel 70 and the truss foundation assembly 60 can be connected by bolts 350 to achieve fixation between them.

[0051] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A tunnel arch structure, characterized in that, It includes an inner arched support structure, a middle arched support assembly, an outer arched support structure, and an orifice pipe assembly for constructing the pipe roof. The inner arched support structure is erected on the outside of the open-cut lining structure, and the outer arched support structure is erected on the outside of the inner arched support structure. The inner arched support structure and the outer arched support structure are connected at their ends, and the orifice pipe assembly is connected to the outer wall of the outer arched support structure. The outer wall of the inner arched support structure has a first placement groove for placing the middle arched support component, and the inner wall of the outer arched support structure has a second placement groove for placing the middle arched support component. The second placement groove and the first placement groove are arranged in a one-to-one correspondence, and the middle arched support component is placed between the first placement groove and the second placement groove.

2. The tunnel arch structure according to claim 1, characterized in that, Both the inner arched support structure and the outer arched support structure are corrugated steel plates, and the first placement groove and the second placement groove are corrugated grooves of corrugated steel plates.

3. The tunnel arch structure according to claim 2, characterized in that, The inner arched support structure includes a first corrugated steel plate body, a first connecting plate and a second connecting plate arranged opposite each other along the tunnel extension direction, the first connecting plate and the second connecting plate being connected to both ends of the first corrugated steel plate body; the outer arched support structure includes a second corrugated steel plate body, a third connecting plate and a fourth connecting plate arranged opposite each other along the tunnel extension direction, the third connecting plate and the fourth connecting plate being connected to both ends of the second corrugated steel plate body; wherein, the first connecting plate and the third connecting plate are detachably connected, and the second connecting plate and the fourth connecting plate are detachably connected.

4. The tunnel arch structure according to claim 3, characterized in that, The first connecting plate, the second connecting plate, the third connecting plate, and the fourth connecting plate are all L-shaped connecting plates, and the L-shaped connecting plate includes horizontal plates and vertical plates that are connected to each other. The first connecting plate has a first connecting hole for bolts to pass through on its horizontal plate, and the third connecting plate has a third connecting hole that corresponds to the first connecting hole on its horizontal plate. The first connecting plate is connected to the third connecting plate by bolts passing through the first connecting hole and the third connecting hole. The second connecting plate has a second connecting hole for bolts to pass through on its horizontal plate, and the fourth connecting plate has a fourth connecting hole that corresponds to the second connecting hole. The second connecting plate is connected to the fourth connecting plate by bolts passing through the second connecting hole and the fourth connecting hole.

5. The tunnel arch structure according to claim 2, characterized in that, The intermediate arch support assembly includes multiple I-beams spaced apart along the tunnel extension direction. The bottom of the corrugated groove is flat. The outer side plate of the I-beam is embedded in the second placement groove, and the inner side plate of the I-beam is embedded in the first placement groove.

6. The tunnel arch structure according to claim 1, characterized in that, The orifice pipe assembly includes multiple orifice pipes spaced apart along the circumferential direction of the tunnel, and each orifice pipe is connected to the outer wall of the outer arch support structure.

7. The tunnel arch structure according to claim 6, characterized in that, The orifice pipe is connected to the outer wall of the outer arched support structure by fixed reinforcing bars.

8. The tunnel arch structure according to claim 4, characterized in that, The vertical plate of the first connecting plate is disposed outside the vertical plate of the third connecting plate, and the vertical plate of the second connecting plate is disposed outside the vertical plate of the fourth connecting plate.

9. The tunnel arch structure according to claim 5, characterized in that, It also includes a pad assembly disposed between the orifice pipe assembly and the outer arched support structure. The pad assembly includes multiple pads that are arranged one-to-one with the I-beams, and the height of the multiple pads gradually increases from the open opening to the closed opening, so that the orifice pipe is tilted upward.

10. The tunnel arch structure according to claim 1, characterized in that, It also includes a mortise arch foundation assembly, which is located at the arch foot and is used to allow the bottom of the inner arch support structure and the bottom of the outer arch support structure to overlap.

Images