An in-situ welding construction device and construction process for a steel lining of an underground artificial tunnel

Abstract

The application discloses a kind of underground artificial tunnel steel lining in-situ welding construction device and construction technology in the technical field of tunnel interior steel lining installation, including the lead transport system with towed transport department;With fixed connection and including annular truss of towed transport department fixed support system, annular truss is circumferentially distributed with multiple and cooperates with steel lining pipe piece auxiliary just-in-time slot hole;Including inner radial support system of middle axis truss, inner support rod and inner support beam, middle axis truss is coaxially arranged with annular truss, the both ends of inner support rod are respectively fixedly connected with middle axis truss, inner support beam, and the axial dimension of inner support rod can be adjusted;Including outer support rod and outer support beam of outer radial support system, outer support beam is arranged between inner support beam and tunnel wall surface, and the axial dimension of outer support rod can be adjusted.The application can greatly speed up steel lining structure welding construction efficiency, and be favorable to speed up the overall construction efficiency of underground artificial cavern.

Description

Technical Field

[0001] This invention relates to the field of steel lining installation technology for tunnel interiors, specifically to an in-situ welding construction device and process for steel lining of underground artificial tunnels. Background Technology

[0002] In recent years, with the continuous emergence of new energy storage technologies such as pumped hydro storage, compressed air energy storage, and electrochemical energy storage, compressed air energy storage, as a power energy storage technology capable of large-capacity and long-term energy storage, has broad application prospects. Compared with pumped hydro storage, compressed air energy storage has advantages such as shorter construction cycle, less restriction on project site selection due to geographical conditions, flexible deployment, and strong applicability. Compared with electrochemical energy storage, compressed air energy storage has advantages such as larger capacity, longer discharge duration, ability to provide rotational inertia, higher safety, longer lifespan, less environmental pollution, and stronger adaptability to high and low temperatures.

[0003] From the perspective of the current development of compressed air energy storage technology in China, the design and construction of underground artificial caverns is the main technical challenge in the development of compressed air energy storage projects, significantly impacting project costs and construction periods. Currently, common underground caverns for compressed air energy storage mainly utilize existing underground salt caverns, abandoned mine shafts, and artificially excavated caverns. Most of the compressed air energy storage projects already built and put into operation in China mainly involve the renovation of existing caverns; there are no successful operational precedents for constructing compressed air energy storage projects using newly built underground artificial caverns.

[0004] Due to limitations such as operating pressure, cavern depth, and surrounding rock conditions, the current protective structure of underground caverns for compressed air energy storage primarily uses steel linings. Developing compressed air energy storage using existing abandoned mine shafts mainly relies on existing slag removal channels, which have limited dimensions and transportation conditions, making modification difficult. If artificial underground caverns are used, longer construction channels must be built. Due to limitations in investment, construction period, and construction conditions, the size of these channels is often smaller than the main tunnel excavation size. Given the limited construction space in the underground cavern, the steel lining structure typically needs to be transported in sections and pieces to the cavern, where longitudinal seams are welded to form a circle before being transported to the installation location for circumferential transverse seam welding. However, transporting the entire steel lining structure within the underground cavern is quite difficult, severely restricting the efficiency of steel lining welding and extending the overall construction period of the artificial underground cavern.

[0005] Therefore, how to improve the welding efficiency of steel-lined structures and accelerate the overall construction speed of underground artificial caverns has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide an in-situ welding construction device for steel lining of underground artificial tunnels, so as to solve the technical problem of low welding construction efficiency of existing steel lining structures.

[0007] The technical solution adopted in this invention is: an in-situ welding construction device for steel lining of underground artificial tunnels, comprising:

[0008] A traction transport system, which is capable of moving along the tunnel extension direction, and the traction transport system includes a towing unit;

[0009] A fixed support system is fixedly connected to the towing unit, and the fixed support system includes an annular truss. Multiple auxiliary positioning slots are distributed circumferentially on the annular truss, and the central angle corresponding to the auxiliary positioning slots is greater than the central angle corresponding to the steel liner segment, so that the steel liner segment can pass through the annular truss axially.

[0010] An inner radial support system includes a central axis truss, inner support rods, and inner support beams. The central axis truss is coaxially arranged with a ring truss, and multiple inner support beams are distributed around the circumference of the central axis truss. One end of each inner support rod is fixedly connected to the central axis truss, and the other end is fixedly connected to an inner support beam. The axial dimension of the inner support rod is adjustable so that the inner support beam provides inner radial support for the steel liner segments.

[0011] An external radial support system includes external support rods and external support beams. Multiple external support beams are distributed circumferentially around an annular truss. The external support beams are positioned between the inner support beams and the tunnel wall. The axial dimension of the external support rods is adjustable so that the external support beams provide external radial support for the steel lining segments.

[0012] Preferably, the fixed support system includes a ring truss, inner support frames, and outer support frames. The ring truss includes an inner ring beam and an outer ring beam arranged coaxially, and N rigid connectors are circumferentially distributed and fixedly connected between the inner ring beam and the outer ring beam to form N auxiliary positioning slots between the inner ring beam and the outer ring beam. A plurality of inner support frames are arranged radially along the ring truss and fixedly connected to the inner ring beam, and one end of the inner support beam is detachably fixedly connected to the inner support frame. N+1 outer support frames are circumferentially distributed around the ring truss and fixedly connected to the outer ring beam, and the outer support beam is axially slidably connected to the outer support frame, where N=3, N=4, or N=5.

[0013] Preferably, the outer support frame is provided with a insertion slot, and the outer support beam is inserted into the insertion slot. In the radial direction, the size of the insertion slot is larger than the size of the outer support beam, and the outer support beam and the inner support beam are staggered in the circumferential direction.

[0014] Preferably, the fixed support system further includes a hoisting track bracket and a lifting system. The hoisting track bracket is located at the top of the annular truss and is fixedly connected to the annular truss, and the hoisting track bracket is equipped with a lifting system.

[0015] Preferably, the inner radial support system further includes an inner protective net, with multiple inner protective nets evenly distributed around the circumference, and each inner protective net being circumferentially connected between two inner support beams.

[0016] Preferably, the traction transport system includes a traction unit, a towing unit, a segment base, and a truss base. The traction unit is connected to the towing unit. There are two towing units. The towing unit is provided with a segment base and a truss base. The segment base can be raised and lowered. The annular truss is detachably and fixedly connected to the truss base.

[0017] Preferably, the bottom surface of the tunnel is provided with a track, and the traction transport system is movably mounted on the track.

[0018] The second objective of this invention is to provide an in-situ welding construction process for steel linings in underground artificial tunnels, the process comprising the following steps:

[0019] S10: First, the tunnel is excavated and the tunnel wall is formed, and then the embedded fasteners are installed on the tunnel wall.

[0020] S20: Multiple steel liner segments are spliced ​​together along the circumferential direction to form a steel liner circular tube by means of an inner radial support system and an outer radial support system;

[0021] S30: Weld the steel-lined round pipe, remove the outer radial support system, and weld the steel-lined pipe segments to the embedded fasteners;

[0022] S40: Construction is carried out on the first concrete backfill area on both sides and top of the steel-lined circular pipe;

[0023] S50: First, remove and move the inner radial support system, and then construct the second concrete backfill area at the bottom of the steel-lined circular pipe.

[0024] The beneficial effects of this invention are:

[0025] This invention employs in-situ welding, with a movable traction and transportation system installed inside the tunnel. This system moves the steel lining segments, fixed support system, inner radial support system, and outer radial support system. The fixed support system has arc-shaped auxiliary positioning slots, allowing the steel lining segments to be axially passed through these slots using lifting equipment, moving them to the welding position. The inner and outer radial support systems then provide radial support and fixation for the steel lining segments on both sides. Multiple steel lining segments can be assembled into a circular steel lining tube in situ. After in-situ welding of the circular steel lining tube, the traction and transportation system moves the inner and outer radial support systems to the next work position. This not only achieves in-situ welding of the tunnel steel lining but also reduces the movement of the steel lining structure within the tunnel, shortens the steel lining construction cycle, and improves the efficiency of steel lining construction. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the in-situ welding construction device for steel lining of underground artificial tunnels according to the present invention.

[0027] Figure 2 for Figure 1 AA view in the middle;

[0028] Figure 3 for Figure 1 BB view in the middle.

[0029] Explanation of the reference numerals in the figure:

[0030] 100. Tunnel;

[0031] 110. Tunnel wall; 120. Track; 130. Embedded fasteners; 140. Foundation;

[0032] 200. Traction and transportation system;

[0033] 210. Traction unit; 220. Transport unit; 230. Segment support; 240. Truss base;

[0034] 300. Fixed support system;

[0035] 310. Circular truss; 311. Inner circular beam; 312. Outer circular beam; 313. Rigid connector; 314. Auxiliary positioning slot; 320. Inner support frame; 330. Outer support frame; 340. Lifting track support; 350. Lifting system;

[0036] 400. Inner radial support system;

[0037] 410. Central axis truss; 420. Inner support rod; 430. Inner support beam; 440. Inner protective netting;

[0038] 500. External radial support system;

[0039] 510. External support rod; 520. External support beam;

[0040] 600. Steel-lined round pipe;

[0041] 610. Steel lining segments; 620. Partition plates;

[0042] 700. First concrete backfill area;

[0043] 800, Second concrete backfill area. Detailed Implementation

[0044] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0045] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention according to the specific circumstances.

[0047] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0048] Examples, such as Figure 1 , Figure 2 , Figure 3 As shown, an in-situ welding construction device for steel lining of underground artificial tunnels includes:

[0049] The traction transport system 200 is capable of moving along the extension direction of the tunnel 100, and the traction transport system 200 includes a towing unit 220.

[0050] A fixed support system 300 is fixedly connected to the towing unit 220, and the fixed support system 300 includes an annular truss 310. Multiple auxiliary positioning slots 314 are distributed circumferentially on the annular truss 310, and the central angle corresponding to the auxiliary positioning slots 314 is larger than the central angle corresponding to the steel liner 610, so that the steel liner 610 can pass through the annular truss 310 axially.

[0051] An inner radial support system 400 includes a central axis truss 410, inner support rods 420, and inner support beams 430. The central axis truss 410 is coaxially arranged with the annular truss 310, and multiple inner support beams 430 are distributed around the circumference of the central axis truss 410. One end of the inner support rod 420 is fixedly connected to the central axis truss 410, and the other end of the inner support rod 420 is fixedly connected to the inner support beams 430. The axial dimension of the inner support rod 420 can be adjusted so that the inner support beams 430 provide inner radial support for the steel liner segment 610.

[0052] An external radial support system 500 includes external support rods 510 and external support beams 520. Multiple external support beams 520 are distributed circumferentially around the annular truss 310. The external support beams 520 are disposed between the inner support beam 430 and the tunnel wall 110. The axial dimension of the external support rods 510 is adjustable so that the external support beams 520 provide external radial support for the steel liner segments 610.

[0053] This application employs in-situ welding. A movable traction and transportation system 200 is installed inside the tunnel 100. The traction and transportation system 200 can move the steel liner segment 610, the fixed support system 300, the inner radial support system 400, and the outer radial support system 500. The fixed support system 300 is provided with an arc-shaped auxiliary positioning slot 314. The steel liner segment 610 can be axially passed through the auxiliary positioning slot 314 using lifting equipment, and moved to the welding installation position, cooperating with the inner radial support system 500. The inner radial support system 400 and the outer radial support system 500 provide radial support and fixation for the steel lining segments 610 on both the inner and outer sides, thereby assembling multiple steel lining segments 610 into a steel lining circular tube 600 in situ. After the steel lining circular tube 600 is welded in situ, the inner radial support system 400 and the outer radial support system 500 are moved to the next work position by the traction and transportation system 200. This not only realizes the in-situ welding of the steel lining inside the tunnel 100, but also reduces the movement of the steel lining structure inside the tunnel 100, shortens the steel lining construction cycle, and improves the steel lining construction efficiency.

[0054] In one specific embodiment, such as Figure 1 , Figure 3As shown, the fixed support system 300 includes an annular truss 310, an inner support frame 320, and an outer support frame 330; wherein, the annular truss 310 includes an inner annular beam 311 and an outer annular beam 312 arranged coaxially, the inner annular beam 311 is disposed inside the outer annular beam 312, and N rigid connectors 313 are fixedly connected circumferentially between the inner annular beam 311 and the outer annular beam 312, so that N auxiliary positioning slots 314 are formed between the inner annular beam 311 and the outer annular beam 312.

[0055] The N+1 inner support frames 320 are evenly distributed around the axis of the annular truss 310, and each inner support frame 320 is arranged radially along the annular truss 310. One end of all the inner support frames 320 is fixedly connected to the central axis truss 410, and the other end of the inner support frame 320 is fixedly connected to the inner annular beam 311. One end of the inner support beam 430 is detachably fixedly connected to the inner support frame 320.

[0056] N+1 outer support frames 330 are evenly distributed around the circumference of the annular truss 310, and each outer support frame 330 is fixedly connected to the outer annular beam 312. The outer support beam 520 and the outer support frame 330 are slidably connected along the axial direction of the annular truss 310; wherein, N=3, N=4, or N=5.

[0057] Preferably, an insertion slot (not shown in the figure) is provided on the outer support frame 330. One end of the outer support beam 520 is inserted into the insertion slot. In the radial direction of the annular truss 310, the size of the insertion slot is larger than the size of the outer support beam 520, so that when the outer support rod 510 extends, it can drive the outer support beam 520 to move toward the steel liner 610, thereby making the inner support beam 430 and the outer support beam 520 radially clamp and fix the steel liner 610. At the same time, after the steel liner 600 is welded, the outer support beam 520 can be axially moved through the insertion slot and pulled out, thereby removing the outer support beam 520 from the first concrete backfill area 700.

[0058] More preferably, the outer support beam 520 and the inner support beam 430 are offset in the circumferential direction.

[0059] In a further preferred embodiment, the fixed support system 300 also includes a hoisting track bracket 340 and a lifting system 350. The hoisting track bracket 340 is located at the top of the annular truss 310 and is fixedly connected to the annular truss 310. The hoisting track bracket 340 is equipped with a lifting system 350 for hoisting and positioning the steel liner segment 610.

[0060] In one specific embodiment, such as Figure 1 , Figure 2As shown, the inner radial support system 400 also includes an inner protective net 440, with multiple inner protective nets 440 evenly distributed around the circumference, and each inner protective net 440 is circumferentially fixedly connected between two inner support beams 430.

[0061] The adjustment of the axial dimension of the inner support rod 420 is existing technology, and one method is described in detail below: The inner support rod 420 includes a threaded connecting rod and two adjusting cylinders, and the adjusting cylinders are coaxially arranged between the two threaded connecting rods. The two ends of the adjusting cylinders are provided with reverse internal threads; one end of one threaded connecting rod is threadedly connected to the adjusting cylinder, and the other end is fixedly connected to the central axis truss 410; one end of the other threaded connecting rod is threadedly connected to the adjusting cylinder, and the other end is fixedly connected to the inner support beam 430, so that the radial dimension of the inner support rod 420 can be adjusted by rotating the adjusting cylinders and threaded connection.

[0062] In one specific embodiment, such as Figure 1 , Figure 2 , Figure 3 As shown, the traction transport system 200 can travel on the track 120 set at the bottom of the tunnel 100, and is used for moving the entire construction device, hoisting and positioning the steel lining segments 610, and switching working positions.

[0063] The traction and transportation system 200 includes a traction unit 210, a towing unit 220, a segment support 230, and a truss base 240. The traction unit 210 and the towing unit 220 are linearly arranged inside the tunnel 100. One end of the traction unit 210 is connected to the towing unit 220. There are two towing units 220, which are connected by a connecting joint. One towing unit 220 is equipped with a segment support 230 to carry and transport steel-lined segments 610. The other towing unit 220 is equipped with a segment support 230 and a truss base 240. The annular truss 310 is detachably and fixedly connected to the truss base 240 to install and fix the fixed support system 300. The segment support 230 can be raised and lowered to form a complete steel-lined circular tube 600 from multiple steel-lined segments 610 and to separate the steel-lined segments 610 from the traction and transportation system 200.

[0064] Preferably, a jack is provided between the segment support 230 and the towing part 220, and the height of the segment support 230 can be adjusted by the jack to realize the adjustment of the height of the steel liner segment 610 and the separation of the segment support 230 from the steel liner circular tube 600.

[0065] In one specific embodiment, such as Figure 1 , Figure 2 , Figure 3As shown, the tunnel 100 includes an arc-shaped tunnel wall 110 and a straight tunnel bottom. A foundation 140 is poured on the tunnel bottom, and two tracks 120 are fixedly installed on the foundation 140. The traction transport system 200 is movably mounted on the tracks 120 so that the traction part 210 and the towing part 220 of the traction transport system 200 can move back and forth along the tracks 120.

[0066] An embodiment provides an in-situ welding construction process for the steel lining of an underground artificial tunnel. This process utilizes the aforementioned in-situ welding construction device for the steel lining of underground artificial tunnels and includes the following steps:

[0067] S10: First, excavate the tunnel 100 to form the tunnel wall 110, and then install the pre-embedded fasteners 130 on the tunnel wall 110.

[0068] Specifically, the tunnel 100 is excavated to form the tunnel wall 110. After leveling the bottom of the tunnel 100, a foundation 140 is set up, and a track 120 is installed on the foundation 140 for moving the traction transport system 200. An embedded fastener 130 is set on the tunnel wall 110 for in-situ fixation of the steel liner segment 610 after welding.

[0069] Then, the traction and transportation system 200 is assembled inside the tunnel 100, and the fixed support system 300, the inner radial support system 400 and the outer radial support system 500 are transported into the tunnel, transported to the steel lining installation position by the traction and transportation system 200 and assembled.

[0070] S20: Multiple steel liner segments 610 are spliced ​​together along the circumferential direction to form a steel liner circular tube 600 by means of an inner radial support system 400 and an outer radial support system 500.

[0071] Specifically, the steel liner segment 610 on the towing unit 220 is lifted by the lifting system 350, and manually assisted by the auxiliary positioning slots 314 set on the annular truss 310. After the steel liner segment 610 is moved into place, the inner radial support system 400 and the outer radial support system 500 are adjusted to provide radial support for the steel liner segment 610, and multiple steel liner segments 610 are assembled into a steel liner circular tube 600.

[0072] S30: Weld the steel-lined round tube 600, remove the outer radial support system 500, and weld the steel-lined tube segment 610 to the pre-embedded fastener 130.

[0073] Specifically, after all the steel lining tube segments 610 are assembled in place, axial welds are made. After completion, the outer support rod 510 is removed, and the outer support beam 520 is axially removed through the insertion slot on the outer support frame 330. Then, the welded steel lining round tube 600 is welded and fixed to the pre-embedded fastener 130.

[0074] S40: Construction is carried out on the first concrete backfill area 700 on both sides and top of the steel-lined circular pipe 600.

[0075] Specifically, the area between the steel-lined circular pipe 600 and the tunnel wall 110 is divided into a first concrete backfill area 700 and a second concrete backfill area 800 by a partition plate 620, and concrete pouring is carried out in the first concrete backfill area 700.

[0076] S50: First, remove and move the inner radial support system 400, and then carry out construction on the second concrete backfill area 800 at the bottom of the steel-lined circular pipe 600.

[0077] Specifically, the following steps are taken: First, adjust the length of the inner support rod 420 to separate the inner support beam 430 from the steel lining tube 600. Then, adjust the height of the segment base support 230 to separate the segment base support 230 from the steel lining tube 600. Finally, move the machine to the next working position via the traction and transportation system 200.

[0078] Concrete pouring operations were carried out in the second concrete backfill area 800.

[0079] Compared with the prior art, this application has at least the following beneficial technical effects:

[0080] The construction device described in this application can significantly accelerate the welding construction efficiency of steel lining structures, which is beneficial to speeding up the overall construction efficiency of underground artificial caverns.

[0081] The construction device in this application can realize integrated construction of steel-lined pipe sections, including transportation, hoisting and positioning, splicing and assembling, in-situ welding, and in-situ fixed installation. After the welding of a single steel-lined structure section is completed, the construction device can be moved by the traction of the traction transportation system to facilitate the construction of the next pipe section. The entire construction process has a high degree of automation and good continuity, which is conducive to improving construction efficiency.

[0082] The construction device in this application is assembled from steel structure components, which makes it convenient and quick to assemble and disassemble in and out of the site. At the same time, the individual components are small in size, making transportation convenient. They are less affected by the underground cavern construction passage, which can effectively reduce the size of the construction passage and help reduce investment in underground engineering.

[0083] The internal support rod in this application can be adjusted in axial dimension to adapt to the construction needs of steel lining structures of different diameters, and can meet the in-situ welding needs of steel lining structures of different diameters, thus having good application value.

[0084] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A construction device for in-situ welding of steel lining in underground artificial tunnels, characterized in that, include: A traction transport system (200) is capable of moving along the extension direction of the tunnel (100), and the traction transport system (200) includes a towing unit (220). A fixed support system (300) is fixedly connected to the towing unit (220), and the fixed support system (300) includes an annular truss (310). The annular truss (310) has a plurality of auxiliary positioning slots (314) distributed around its circumference, and the central angle corresponding to the auxiliary positioning slots (314) is greater than the central angle corresponding to the steel liner (610), so that the steel liner (610) can pass through the annular truss (310) axially. An inner radial support system (400) includes a central axis truss (410), inner support rods (420), and inner support beams (430). The central axis truss (410) is coaxially arranged with the annular truss (310), and multiple inner support beams (430) are distributed around the circumference of the central axis truss (410). One end of the inner support rod (420) is fixedly connected to the central axis truss (410), and the other end is fixedly connected to the inner support beam (430). The axial dimension of the inner support rod (420) can be adjusted so that the inner support beam (430) provides inner radial support for the steel liner segment (610). An external radial support system (500) includes an external support rod (510) and an external support beam (520). A plurality of the external support beams (520) are distributed around the circumference of the annular truss (310). The external support beams (520) are disposed between the inner support beam (430) and the tunnel wall (110). The axial dimension of the external support rod (510) is adjustable so that the external support beams (520) provide external radial support for the steel liner segment (610). The fixed support system (300) includes an annular truss (310), an inner support frame (320), and an outer support frame (330). The annular truss (310) includes an inner annular beam (311) and an outer annular beam (312) arranged coaxially, and N rigid connectors (313) are circumferentially distributed and fixedly connected between the inner annular beam (311) and the outer annular beam (312) to form N auxiliary positioning slots (314) between the inner annular beam (311) and the outer annular beam (312); multiple inner support frames (310, 320, 330) are also included. 20) The inner support frame (320) is arranged radially along the annular truss (310). One end of the inner support frame (320) is fixedly connected to the central axis truss (410), and the other end of the inner support frame (320) is fixedly connected to the inner annular beam (311). One end of the inner support beam (430) is detachably fixedly connected to the inner support frame (320). N+1 outer support frames (330) are evenly distributed around the circumference of the annular truss (310) and fixedly connected to the outer annular beam (312). The outer support beam (520) is axially slidably connected to the outer support frame (330).

2. The in-situ welding construction device for steel lining of underground artificial tunnels according to claim 1, characterized in that, N=3 or N=4 or N=5.

3. The in-situ welding construction device for steel lining of underground artificial tunnels according to claim 1, characterized in that, The outer support frame (330) is provided with a plug-in groove, and the outer support beam (520) is plugged into the plug-in groove. In the radial direction, the size of the plug-in groove is larger than the size of the outer support beam (520), and the outer support beam (520) and the inner support beam (430) are offset in the circumferential direction.

4. The in-situ welding construction device for steel lining of underground artificial tunnels according to claim 1, characterized in that, The fixed support system (300) further includes a hoisting track bracket (340) and a hoisting system (350). The hoisting track bracket (340) is located at the top of the annular truss (310) and is fixedly connected to the annular truss (310). The hoisting track bracket (340) is equipped with a hoisting system (350).

5. The in-situ welding construction device for steel lining of underground artificial tunnels according to claim 1, characterized in that, The inner radial support system (400) also includes an inner protective net (440), a plurality of inner protective nets (440) are evenly distributed around the circumference, and each inner protective net (440) is circumferentially connected between two inner support beams (430).

6. The in-situ welding construction device for steel lining of underground artificial tunnels according to claim 1, characterized in that, The traction and transportation system (200) includes a traction unit (210), a towing unit (220), a segment support (230), and a truss base (240). The traction unit (210) is connected to the towing unit (220). There are two towing units (220). The towing unit (220) is provided with a segment support (230) and a truss base (240). The segment support (230) can be raised and lowered. The annular truss (310) is detachably and fixedly connected to the truss base (240).

7. The in-situ welding construction device for steel lining of underground artificial tunnels according to claim 1, characterized in that, The bottom surface of the tunnel (100) is provided with a track (120), and the traction transport system (200) is movably mounted on the track (120).

8. A construction process for in-situ welding of steel lining in underground artificial tunnels, wherein the construction process uses the in-situ welding construction device for steel lining in underground artificial tunnels as described in any one of claims 1-7, characterized in that, The process includes the following steps: S10: First, the tunnel (100) is excavated and the tunnel wall (110) is formed. Then, the pre-embedded fasteners (130) are installed on the tunnel wall (110). S20: Multiple steel liner segments (610) are spliced ​​together in the circumferential direction to form a steel liner circular tube (600) by means of an inner radial support system (400) and an outer radial support system (500). S30: Weld the steel-lined round tube (600), remove the outer radial support system (500), and weld the steel-lined tube piece (610) to the pre-embedded fastener (130); S40: Construction is carried out on the first concrete backfill area (700) on both sides and top of the steel-lined circular pipe (600); S50: First, remove and move the inner radial support system (400), and then construct the second concrete backfill area (800) at the bottom of the steel-lined circular pipe (600).

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