Full-circle needle beam trolley based on compressed air energy storage and method

Abstract

The application discloses a full-circle needle beam trolley based on compressed air energy storage and a method, and relates to the technical field of tunnel construction.The full-circle needle beam trolley comprises a needle beam assembly, the bottom of the front end and the rear end of the needle beam assembly is provided with a support leg, a formwork assembly, the formwork assembly is arranged outside the needle beam assembly along the front-rear direction of the needle beam assembly, the formwork assembly comprises at least a first formwork group and a second formwork group, a beam frame assembly, the beam frame assembly is arranged outside the needle beam assembly, a support member is arranged between the beam frame assembly and the formwork assembly to connect the beam frame assembly and the formwork assembly, wherein, the front end and the rear end of the needle beam assembly are provided with guide mechanisms, so that the beam frame assembly drives the support member and the formwork assembly to slide along the front-rear direction of the needle beam assembly under the traction of the guide mechanisms.The embodiment of the application realizes a modular trolley, closed-loop sensing and automatic welding / grouting, ensures formwork positioning and welding seam / grouting quality, and reduces the risk of leakage and rework.

Description

Technical Field

[0001] This application relates to the field of tunnel construction technology, specifically to a full-circular needle beam trolley and method based on compressed air energy storage. Background Technology

[0002] Compressed air energy storage projects utilize underground artificial chambers, mostly located in rock strata at depths of approximately 150-200 meters. Generally, good integrity of the surrounding rock and low groundwater levels are required. The main gas storage chamber is excavated with a circular or horseshoe-shaped cross-section, while the secondary lining and sealing layer also use a circular cross-section. The excavation and lining of the circular cross-section chambers employ the construction techniques of hydraulic tunnels, first constructing the initial support (step method), and then, after complete breakthrough, using a needle-beam trolley to reverse and construct the secondary lining and sealing layer.

[0003] The key focus and challenge in constructing underground artificial chambers for compressed air energy storage lies in the sealing layer. Currently, there are no completed and operational solutions in China. The main directions of research and development in ongoing projects and by various research institutions are as follows:

[0004] a) Thick steel plate type: After the initial support is completed, 2-2.5cm thick steel plates are welded into the tank body. Sealing concrete (secondary lining) is poured between the tank body and the initial support. This scheme has high cost and is difficult to transport and weld steel plates.

[0005] b. Thin steel plate composite type: using 0.5-1.5cm thick steel plate + anti-corrosion layer as sealing layer. This solution has less difficulty in welding steel plates and lower cost.

[0006] c. Flexible sealing type: This scheme uses a 2mm stainless steel plate + flexible layer + anti-corrosion layer. The flexible layer construction process is complicated and the finished product is difficult to inspect. In addition, a suitable material has not yet been found. Currently, research directions include vulcanized rubber, polyurea materials, and polyurethane, but none of them have yielded practical results. Vulcanized rubber is the most likely option, but it requires on-site vulcanization.

[0007] Currently, there are two main construction techniques for the lining and sealing layer of the tunnel. One method involves using the steel lining sealing layer as a template and pouring it together with the concrete in one go. The other method involves first constructing the secondary lining concrete, then welding the sealing layer steel plates into a ring, leaving a gap of approximately 5 centimeters between the steel lining and the secondary lining concrete, sealing it, and then filling it with grout.

[0008] Conventional needle beam trolleys are used for pouring sealing concrete for secondary linings, but cannot meet the current construction needs of chamber lining and sealing layers. Therefore, this application proposes a full-circle needle beam trolley for compressed air energy storage chambers. Summary of the Invention

[0009] One of the objectives of this application is to provide a full-circle needle beam trolley and method based on compressed air energy storage for welding and positioning the steel plate lining during tunnel construction.

[0010] To achieve the above objectives, this application provides the following technical solution: a full-circular needle beam trolley based on compressed air energy storage, comprising:

[0011] A needle beam assembly, wherein support legs are provided at the front end and the bottom of the rear end of the needle beam assembly;

[0012] A template assembly is disposed outside the needle beam assembly along the front-rear direction of the needle beam assembly, and the template assembly includes at least a first template group and a second template group;

[0013] A beam frame assembly is provided on the outside of the needle beam assembly, and a support member is provided between the beam frame assembly and the template assembly to connect the beam frame assembly and the template assembly;

[0014] The needle beam assembly is provided with guide mechanisms at both the front and rear ends. The guide mechanisms are connected to the beam frame assembly so that the beam frame assembly drives the support member and the template assembly to slide along the needle beam assembly in the front and rear directions under the traction of the guide mechanisms.

[0015] The second template group spans two adjacent steel bushings and supports the steel bushings.

[0016] In some embodiments, the first template group and the second template group are coaxially arranged, the second template group can be embedded inside the second template group, and the second template group can at least partially extend to the outside of the first template group.

[0017] In some embodiments, the first template group includes a top mold, a first side mold, a second side mold, and a bottom mold. Each of the top mold, the first side mold, the second side mold, and the bottom mold is provided with a mold frame and a top plate, and the top plate is installed inside the mold frame.

[0018] The top mold is hinged to the first side mold or the second side mold to form a top hinge axis, and the first side mold and the second side mold are hinged to the bottom mold to form a bottom hinge axis. The support member connects at least the top mold, the first side mold and the second side mold.

[0019] The top plate serves two purposes. First, it functions as a formwork, secured by connectors during pouring. After the top mold, first side mold, and second side mold are retracted, the top plate detaches from the mold frame. Second, it functions as a steel lining plate. The top plate is inserted into a slot but not connected by connectors. After pouring, the trolley moves to leave the top plate in the pouring position.

[0020] In some embodiments, the mold frame is provided with a slot for engaging the top plate, and the top plate is installed in the slot to restrict the top plate to a coaxial state with the first template group;

[0021] The template has a connector on its inner side, which is configured to be fixed or detached. When the connector is in the fixed position, the top plate is limited.

[0022] In some embodiments, the first template group further includes a stop member, the stop member including a retainer, a push rod and a ring body, the ring body being configured to be coaxial with the mold frame and connected to the mold frame;

[0023] The card holder is hinged to the outside of the mold frame, and the push rod is disposed between the ring body and the card holder and connected to the ring body and the card holder, so that the working surface of the card holder is perpendicular to the outer wall of the mold frame when supported by the push rod.

[0024] In some embodiments, the stop member is at least disposed on one side of the mold frame, and the retainer contacts the top plate;

[0025] The top plate can be replaced with a steel lining plate.

[0026] In some embodiments, the second template group includes a first carriage, a second carriage, a support rod, an annular frame, and a top block. The annular frame is located between the first carriage and the second carriage so that the annular frame can rotate relative to the first carriage and the second carriage. The first carriage and the second carriage are slidably mounted on the outside of the beam frame assembly.

[0027] The support rod is located inside the first and second carriages, and the top block is installed at the end of the support rod, changing the radial position of the top block when the support rod extends or retracts.

[0028] In some embodiments, the ring frame includes a side plate, a frame body, a drive member, and a mounting base. The side plate is connected to the first slide or the second slide, and the frame body is embedded inside the side plate and is rotatable relative to the side plate.

[0029] The mounting base is located inside the frame and rotates with the frame. The driving component is installed inside the first and second slides and connected to the frame, so that the driving component can drive the frame to rotate.

[0030] The drive unit is symmetrically installed on the first and second slides on both sides. The drive unit includes a drive motor, a drive gear, and a driven gear. The driven gear is connected to the frame. The drive motor is installed on the first or second slide. The drive gear meshes with the driven gear and is connected to the drive motor to drive the frame to rotate.

[0031] In some embodiments, the first carriage and the second carriage are provided with at least one set of electromagnetic components, which magnetically attract the joint between the top plates.

[0032] A method for constructing a chamber based on compressed air energy storage includes the following steps:

[0033] Excavate in layers using the step method to the design cross section, construct the initial support, and pre-embed grouting pipes on the initial support surface;

[0034] After the connection is completed, check the circumferential dimensions and roundness, establish the construction benchmark for the secondary lining and record the geometric data;

[0035] Determine the construction plan for the steel liner ring;

[0036] According to the design, high-flow self-compacting concrete or conventional pumped concrete is used for segmented pouring and vibration is combined to control the pouring speed and quality.

[0037] Grouting is carried out in sections at the pre-embedded grouting pipes, from bottom to top, and pressure testing is performed to ensure that the interface is full and free of voids.

[0038] After the concrete reaches the demolding strength and meets the curing conditions, demolding should be done by first removing the outer formwork, and then removing the side formwork. Inspect the surface defects and repair them.

[0039] After completing one section, the backstage vehicle slides to the next section, repeating the cycle of pouring, grouting, curing, and demolding, and recording construction data.

[0040] The welds, grout fullness, concrete strength and geometric dimensions are inspected and accepted. After the test section passes the inspection, the construction is scaled up according to the schedule.

[0041] Through the above technical solution, this application has the following beneficial effects:

[0042] The embodiments of this application realize modular trolley, closed-loop sensing and automated welding / grouting, to ensure template positioning and weld and grouting quality, and reduce the risk of leakage and rework.

[0043] This application allows for switching the function of the top plate according to usage conditions. When dealing with different construction processes, the top plate is adjusted accordingly to improve the stability of steel lining welding and the efficiency of steel lining construction.

[0044] Other features and advantages of this application will be set forth in the following description, and in part will be apparent from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0045] Figure 1 This is a structural diagram of a conventional full-circle needle beam trolley.

[0046] Figure 2 This is a schematic diagram of the template assembly for this application. Figure 1 ;

[0047] Figure 3 This is a schematic diagram of the template assembly for this application. Figure 2;

[0048] Figure 4 This is a schematic diagram of the first template group of this application;

[0049] Figure 5 This is a schematic diagram showing the location of the connector in this application;

[0050] Figure 6 This is a schematic diagram of the mold frame for this application;

[0051] Figure 7 This is a plan view of the mold frame in this application;

[0052] Figure 8 This is a plan view of the top mold in this application;

[0053] Figure 9 For this application Figure 8 Enlarged view of point A;

[0054] Figure 10 This is a schematic diagram of the stop component in this application;

[0055] Figure 11 This is a schematic diagram of the card slot in this application;

[0056] Figure 12 This is a schematic diagram of the second template group of this application;

[0057] Figure 13 This is an exploded view of the second template group in this application;

[0058] Figure 14 This is a schematic diagram of the frame of this application.

[0059] In the diagram: 100 needle beam assembly, 200 support legs, 300 template assembly, 400 beam frame assembly, 500 support components, 600 guide mechanism;

[0060] 310 First Template Group, 320 Second Template Group;

[0061] 110 Top mold, 111 First side mold, 112 Second side mold, 113 Bottom mold, 114 Stop piece;

[0062] 120 Mold frame, 121 Top plate, 122 Slot, 123 Connector;

[0063] 130 Card holder, 131 Push rod, 132 Ring body, 133 Working surface;

[0064] 210 First carriage, 211 Second carriage, 212 Support rod, 213 Ring frame, 214 Top block;

[0065] 220 Side plate, 221 Frame, 222 Drive unit, 223 Mounting base, 224 Electromagnetic assembly. Detailed Implementation

[0066] The following describes several embodiments of this application with reference to the accompanying drawings. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details are not intended to limit the application. That is, these practical details are not essential in some embodiments of this application. Furthermore, features of different embodiments can be used interchangeably if feasible.

[0067] Unless otherwise defined, all terms used herein (including technical and scientific terms) have their ordinary meanings, which are understandable to those skilled in the art. Furthermore, the definitions of the aforementioned terms in commonly used dictionaries should be interpreted in the context of this specification as having the meaning consistent with the relevant field of this application. Unless specifically defined, these terms will not be interpreted as having idealized or overly formal meanings.

[0068] The following explains the relationships and terms used in this application:

[0069] Parallelism: The parallelism defined in this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism. It allows for situations where the parallelism is not absolute due to factors such as assembly tolerance, design tolerance, and structural flatness. It also allows for errors within a small angular range, such as within 10 degrees of assembly error. These can all be considered as parallel relationships.

[0070] Perpendicularity: The perpendicularity defined in this application is not limited to an absolute perpendicular intersection (with an included angle of 90 degrees). It is permissible for non-absolute perpendicular intersections caused by factors such as assembly tolerances, design tolerances, and structural flatness. It is permissible for errors within a small angular range, such as an assembly error range of 80 to 100 degrees, which can all be understood as a perpendicular relationship.

[0071] Ground: The ground as defined in this application is not limited to a ground of a certain material or region, but only indicates a platform used to support this application, and allows for stacking, tilting, and variations in flatness. For example, cement ground, tiled ground, work platform, etc., can all be interpreted as ground.

[0072] The above explanation does not fully encompass the relationship definition given in this application, but only represents a part of it.

[0073] In related technologies, compressed air energy storage projects utilize underground artificial chambers, which are mostly located in rock strata at a depth of approximately 150-200m. Generally, good integrity of the surrounding rock and low groundwater levels are required. The main gas storage chamber is excavated with a circular or horseshoe-shaped cross-section, while the secondary lining and sealing layer also use a circular cross-section. The excavation and lining of the circular cross-section chamber employs the construction techniques of hydraulic tunnels, namely, first constructing the initial support (step method), and then using a needle-beam trolley to reverse and construct the secondary lining and sealing layer after complete breakthrough.

[0074] The key focus and challenge in constructing underground artificial chambers for compressed air energy storage lies in the sealing layer. Currently, there are no completed and operational solutions in China. The main directions of research and development in ongoing projects and by various research institutions are as follows:

[0075] a) Thick steel plate type: After the initial support is completed, 2-2.5cm thick steel plates are welded into the tank body. Sealing concrete (secondary lining) is poured between the tank body and the initial support. This scheme has high cost and is difficult to transport and weld steel plates.

[0076] b. Thin steel plate composite type: 0.5-1.5cm thick steel plate + anti-corrosion layer as sealing layer. This solution has less difficulty in welding steel plates and lower cost.

[0077] c. Flexible sealing type: This scheme uses a 2mm stainless steel plate + flexible layer + anti-corrosion layer. The flexible layer construction process is complicated and the finished product is difficult to inspect. In addition, a suitable material has not yet been found. Currently, research directions include vulcanized rubber, polyurea materials, and polyurethane, but none of them have yielded practical results. Vulcanized rubber is the most likely option, but it requires on-site vulcanization.

[0078] The construction processes for the lining and sealing layer of the chamber include the following two:

[0079] The steel lining sealing layer serves as a formwork and is poured together with the concrete in one go;

[0080] First, the secondary lining concrete is applied, and the sealing layer steel plate is welded into a ring. A gap is left between the steel lining and the secondary lining concrete, and after sealing, grout is injected to fill the gap.

[0081] During construction, the steel lining first needs to be treated. This treatment needs to be done on the ground, including cutting edges, beveling, and rolling. Then, it is sent to the platform for welding and shaping. After leaving one longitudinal weld, it is pushed into the trolley to complete the welding of the longitudinal and circumferential seams.

[0082] However, the existing full-circle needle beam trolley cannot independently and completely complete the welding construction work of the steel lining, especially the welding and positioning of the circumferential joint, which affects the construction efficiency.

[0083] In existing trolley structures, the full-circular needle beam trolley includes a traveling section and a forming section. (See [reference needed]). Figure 1As shown, the traveling part includes a needle beam assembly 100 and a guide mechanism 600. Support legs 200 are provided at the front end and rear end bottom of the needle beam assembly 100 to support the full-circle needle beam trolley. The forming part is installed outside the needle beam assembly 100, and both ends of the forming part are connected to the guide mechanism 600. Under the action of the guide mechanism 600, the forming part is pulled to slide relative to the needle beam assembly 100.

[0084] The guide mechanism 600 adopts a combination of rollers and guide rails or low-friction sliders. The guide repeatability positioning accuracy should be ≤±1 mm. The guide mechanism 600 is equipped with a position sensor for closed-loop control. The guide rail surface is treated with wear resistance and is equipped with lubrication and dustproof cover.

[0085] The molding part includes a template assembly 300, a beam frame assembly 400, and a support member 500. The beam frame assembly 400 is connected to the needle beam assembly 100 through a traveling mechanism. Under the action of the traveling mechanism, the beam frame assembly 400 is tractioned by the guide mechanism 600 and slides. The support member 500 is disposed between the template assembly 300 and the beam frame assembly 400 to connect the template assembly 300 and the beam frame assembly 400.

[0086] It is worth noting that the accompanying drawings only show one form of the support member 500. Since the template assembly 300 needs to switch back and forth between support and demolding, in this application, the support member 500 supports the template assembly 300 to generate displacement.

[0087] The control logic for support component 500 is as follows: Before entering support mode, confirm that the outriggers 200 are locked and in the guide position. Support component 500 extends synchronously according to the preset displacement curve and monitors the force through the force sensor. If the force exceeds the limit, an alarm will be automatically triggered and the machine will stop. During demolding, the mold is closed in reverse order, first retracting the top mold 110 and then the side mold to avoid pulling on the newly poured concrete.

[0088] For example, in one embodiment of this application, the support 500 is a hydraulic jack system.

[0089] This application provides a fully circular needle beam trolley based on compressed air energy storage, which differs from existing trolleys in that, as described in the following embodiment... Figure 2-6 As shown, the template assembly 300 includes a first template group 310, which includes at least a top mold 110, a first side mold 111, a second side mold 112, and a bottom mold 113. All four molds are provided with a mold frame 120 and a top plate 121. The top plate 121 is detachably installed on the mold frame 120. The support member 500 connects the top mold 110, the first side mold 111, and the second side mold 112.

[0090] See Figure 7-9As shown, the slot 122 has an opening design on both sides of the mold frame 120. That is, the width of the opening on both sides of the slot 122 is greater than the width in the middle and a transition is formed by the arc. When the top mold 110 and the side mold are in the retracted state, the top plate 121 can also be inserted through the slot 122. The top plate 121 is inserted by the top mold 110 or the first side mold 111 and the second side mold 112, and moves to the bottom mold 113 under the action of the pushing force.

[0091] The top mold 110 is connected to the first side mold 111 or the second side mold 112 and contacts the other side mold. The first side mold 111 and the second side mold 112 are both connected to the bottom mold 113. The connection between the top mold 110 and the first side mold 111 or the second side mold 112 forms a top hinge shaft, and the connection between the first side mold 111, the second side mold 112 and the bottom mold 113 forms a bottom hinge shaft.

[0092] During support, the first side mold 111 and the second side mold 112 first open to their maximum positions along the bottom hinge axis, and then the top mold 110 opens to its maximum position along the top hinge axis.

[0093] During demolding, the top mold 110 retracts first along the top hinge axis, and then the first side mold 111 and the second side mold 112 retract along the bottom hinge axis.

[0094] It is understood that the first template group 310 provided in this application embodiment does not limit the number of templates, and the number of templates can be set to several to meet the motion in different scenarios.

[0095] Meanwhile, the support member 500 is not only connected to the top mold 110, the first side mold 111 and the second side mold 112, but can also be connected to the bottom mold 113. The support member 500 controls the top mold 110, the first side mold 111 and the second side mold 112 with a swing motion, and controls the bottom mold 113 with a vertical motion.

[0096] The mold frame 120 has a slot 122 for positioning the top plate 121. When the top plate 121 is installed, it is embedded in the slot 122 to limit the position of the top plate 121 and prevent it from deviating. When the top plate 121 is in a fixed state, a connector 123 is provided on the inner side of the mold. The connector 123 connects to the top plate 121, so that the top plate 121 moves with the mold frame 120.

[0097] It should be noted that the top plate 121 shown in this embodiment has two functions. First, it is used as a template. The top plate 121 is fixed by the connector 123 and serves as a template during casting. After the top mold 110, the first side mold 111, and the second side mold 112 are retracted, the top plate 121 detaches from the mold frame 120. Second, it is used as a steel liner. The top plate 121 is inserted into the slot 122 but is not connected by the connector 123. After casting is completed, the trolley movement leaves the top plate 121 in the casting position.

[0098] The first template group 310 is also equipped with a stop member 114, see reference. Figure 10-11 As shown, the stop 114 is installed on at least one side of the mold frame 120. The stop 114 is used to seal the side during the casting process, and the stop 114 can also clamp the top plate 121, thus limiting the position of the top plate 121.

[0099] The stop 114 includes a retainer 130, a push rod 131, and a ring 132. The ring 132 is coaxial with and connected to the mold frame 120 to ensure that the positions of the mold frame 120 and the ring 132 are relatively stable. When the mold frame 120 swings, the ring 132 will also swing accordingly. The retainer 130 can swing and is hinged to the outside of the mold frame 120. When the action surface 133 of the retainer 130 is perpendicular to the outer wall of the mold frame 120, the retainer 130 clamps the top plate 121.

[0100] The push rod 131 is a hydraulic rod, with its two ends connected to the ring body 132 and the clamping seat 130 respectively. When the hydraulic rod extends or retracts, it can control the movement of the clamping seat 130. When the clamping seat 130 is in the supported state, it clamps the top plate 121 and is larger than the outer diameter of the mold frame 120. When the clamping seat 130 is in the retracted state, it is smaller than the outer diameter of the mold frame 120.

[0101] When the card holder 130 is in the retracted state, since it is smaller than the outer diameter of the mold frame 120, the template assembly 300 is pulled by the guide mechanism 600, thus avoiding interference on the movement path of the card holder 130.

[0102] Understandably, the clamping of the top plate 121 by the clamping seat 130 can further ensure the stability of the top plate 121. When the top plate 121 is a steel liner, it is necessary to maintain the stability of the steel liner before performing longitudinal and circumferential welding. The clamping of the clamping seat 130 stabilizes the top plate 121.

[0103] In addition, when the top plate 121 is a template, the card holder 130 serves as a seal for the end face and cooperates with the connector 123 to further improve the stability of the top plate 121.

[0104] The clamping seat 130 and the connector 123 form redundant positioning to ensure that the top plate 121 does not shift under vibration or concrete lateral pressure.

[0105] In one embodiment, the second template assembly 320 includes a first carriage 210, a second carriage 211, a support rod 212, a ring frame 213, and a top block 214, see reference. Figure 12-14As shown, the second template group 320 can be set inside the first template group 310 and partially extend to the outside of the first template group 310. Alternatively, the first template group 310 and the second template group 320 can be set separately, and during circumferential weld auxiliary welding, the second template group 320 partially extends into the first template group 310.

[0106] It should be noted that when the second template group 320 is installed inside the first template group 310, the second template group 320 is mounted on the beam-frame assembly 400, and the second template group 320 can slide relative to the beam-frame assembly 400. When the second template group 320 is installed outside the first template group 310, the second template group 320 can be independently connected to the beam-frame assembly 400 and the needle beam assembly 100, and the beam-frame assembly 400 can drive the second template group 320 to slide relative to the needle beam assembly 100.

[0107] The ring frame 213 is disposed between the first slide 210 and the second slide 211. Part of the structure of the ring frame 213 can rotate relative to the first slide 210 and the second slide 211. The support rods 212 are symmetrically installed on the inner walls of the first slide 210 and the second slide 211 respectively, and the support rods 212 are telescopic. The top block 214 is installed at the end of the support rod 212. After being supported by the support rod 212, the top block 214 supports the steel liner plate.

[0108] The ring frame 213 includes a side plate 220, a frame body 221, a drive component 222, and a mounting base 223. The side plate 220 is located on both sides of the frame body 221 and connects the first slide 210 and the second slide 211. The frame body 221 is embedded inside the side plate 220 and can rotate relative to the side plate 220. The first slide 210 and the second slide 211 can drive the frame body 221 to slide through the side plate 220.

[0109] The mounting base 223 is fixed inside the frame 221 to fix the welding torch of the welding equipment. The frame 221 drives the welding torch to move during rotation, thereby controlling the circular motion of the welding torch.

[0110] Because the trolley is large in size, it is inconvenient for the operator to weld the high-position weld when welding the steel liner ring. Therefore, the welding gun is installed on the mounting base 223, and the rotation of the frame 221 drives the welding gun to move along the circumferential seam to complete the welding of the circumferential seam.

[0111] Mounting base 223 provides rigid support for the welding torch and sensor. In another embodiment, mounting base 223 is provided with a fine-tuning mechanism to correct the welding torch posture.

[0112] The drive unit 222 is symmetrically installed on both sides of the first slide 210 and the second slide 211. The drive unit 222 includes a drive motor, a drive gear, and a driven gear. The driven gear is connected to the frame 221. The drive motor is installed on the first slide 210 or the second slide 211. The drive gear meshes with the driven gear and is connected to the drive motor to drive the frame 221 to complete the rotation.

[0113] At least one set of electromagnetic components 224 is provided for the first carriage 210 and the second carriage 211. The electromagnetic components 224 magnetically attract the top plate 121 at the joint between the top plates 121, forming a traction at the joint of the top plate 121.

[0114] Electromagnetic components 224 are installed on both sides of the top block 214, and the top block 214 and electromagnetic components 224 are controlled synchronously by the support rod 212.

[0115] Electromagnetic component 224 is used to provide temporary traction and positioning at the top plate joint. Parameter example: single group suction force ≥5kN, working voltage and cooling method are designed according to site conditions (DC power supply with heat sink). Electromagnetic component 224 is equipped with position sensor and current monitoring, and automatically alarms when the suction force is insufficient or the current is abnormal.

[0116] Electromagnetic adsorption is used only as an auxiliary positioning method. The electromagnetic component 224 will generate heat when energized for a long time. The control system limits the continuous energization time and arranges a cooling cycle.

[0117] This application also provides a method for constructing a tunnel based on compressed air energy storage, which is implemented using the aforementioned full-circular needle beam trolley, and includes the following steps:

[0118] Excavate in layers using the step method to the design cross section, immediately construct the initial support (shotcrete, anchor bolts / cables, etc.), and pre-embed grouting pipes on the initial support surface.

[0119] After the connection is completed, the circumferential dimensions and roundness are checked, the secondary lining construction benchmark is established, and the geometric data is recorded.

[0120] Determine the construction plan: Plan A: Position the steel liner ring and complete the longitudinal and circumferential welds; Plan B: Complete the secondary lining first, then push in the steel liner ring and complete the welding; All welds must undergo 100% non-destructive testing.

[0121] According to the design, high-flow self-compacting concrete or conventional pumped concrete is used for segmented pouring and vibration, and the pouring speed and quality are controlled.

[0122] Grouting is carried out in sections at the pre-embedded grouting pipes, from bottom to top, and pressure testing is conducted to ensure that the interface is full and free of voids.

[0123] After the concrete reaches the demolding strength and meets the curing conditions, it is demolded (the top mold 110 is retracted first, and the side molds are retracted later). Surface defects are inspected and repaired.

[0124] After completing one section, the backstage vehicle slides to the next section, repeating the cycle of pouring, grouting, curing, and demolding, and recording construction data.

[0125] The welds, grout fullness, concrete strength and geometric dimensions are inspected and accepted. After the test section passes the inspection, the construction is scaled up according to the schedule.

[0126] Although this application has been disclosed in conjunction with the above embodiments, it is not intended to limit this application. Any person skilled in the art may make various modifications and refinements without departing from the spirit and scope of this application. Therefore, the scope of protection of this application shall be determined by the appended claims.

Claims

1. A full-circular needle beam trolley based on compressed air energy storage, characterized in that, include: Needle beam assembly (100), with support legs (200) at the front and rear bottom of the needle beam assembly (100); Template assembly (300) is arranged in the front-rear direction outside the needle beam assembly (100), and the template assembly (300) includes at least a first template group (310) and a second template group (320). A beam frame assembly (400) is provided on the outside of the needle beam assembly (100), and a support member (500) is provided between the beam frame assembly (400) and the template assembly (300) to connect the beam frame assembly (400) and the template assembly (300). The needle beam assembly (100) is provided with guide mechanisms (600) at both the front and rear ends. The guide mechanisms (600) are connected to the beam frame assembly (400) so that the beam frame assembly (400) drives the support member (500) and the template assembly (300) to slide back and forth along the needle beam assembly (100) under the traction of the guide mechanisms (600). The second template group (320) spans two adjacent steel bushings and supports the steel bushings. The first template group (310) and the second template group (320) are coaxially arranged. The second template group (320) can be embedded inside the second template group (320), and the second template group (320) can at least partially extend to the outside of the first template group (310). The first template group (310) includes a top mold (110), a first side mold (111), a second side mold (112), and a bottom mold (113). The top mold (110), the first side mold (111), the second side mold (112), and the bottom mold (113) are all provided with a mold frame (120) and a top plate (121). The top plate (121) is installed inside the mold frame (120). The top mold (110) is hinged to the first side mold (111) or the second side mold (112) to form a top hinge shaft, and the first side mold (111) and the second side mold (112) are hinged to the bottom mold (113) to form a bottom hinge shaft. The support member (500) connects at least the top mold (110), the first side mold (111), and the second side mold (112). The second template group (320) includes a first slide (210), a second slide (211), a support rod (212), a ring frame (213), and a top block (214). The ring frame (213) is located between the first slide (210) and the second slide (211) so that the ring frame (213) can rotate relative to the first slide (210) and the second slide (211). The ring frame (213) can drive the welding torch to perform a ring motion. The first slide (210) and the second slide (211) are slidably installed on the outside of the beam frame assembly (400). The support rod (212) is located inside the first carriage (210) and the second carriage (211), and the top block (214) is installed at the end of the support rod (212), changing the radial position of the top block (214) when the support rod (212) extends or retracts.

2. The full-circular needle beam trolley based on compressed air energy storage according to claim 1, characterized in that, The mold frame (120) is provided with a slot (122) for engaging the top plate (121), and the top plate (121) is installed in the slot (122) to restrict the top plate (121) to be coaxial with the first template group (310); The template is provided with a connector (123) on the inner side. The connector (123) is configured to be fixed or detached. When the connector (123) is in the fixed state, the top plate (121) is limited.

3. A fully circular needle beam trolley based on compressed air energy storage according to claim 1 or 2, characterized in that, The first template group (310) further includes a stop (114), the stop (114) including a retainer (130), a push rod (131) and a ring (132), the ring (132) being configured to be coaxial with the mold frame (120) and connected to the mold frame (120); The card holder (130) is hinged to the outside of the mold frame (120), and the push rod (131) is disposed between the ring body (132) and the card holder (130) and connected to the ring body (132) and the card holder (130) so that the working surface (133) of the card holder (130) is perpendicular to the outer wall of the mold frame (120) when supported by the push rod (131).

4. A fully circular needle beam trolley based on compressed air energy storage according to claim 3, characterized in that, The stop (114) is provided on at least one side of the mold frame (120), and the card holder (130) is in contact with the top plate (121); The top plate (121) can be replaced with a steel lining plate.

5. A fully circular needle beam trolley based on compressed air energy storage according to claim 4, characterized in that, The ring frame (213) includes a side plate (220), a frame body (221), a drive component (222), and a mounting base (223). The side plate (220) is connected to the first slide (210) or the second slide (211). The frame body (221) is embedded inside the side plate (220) and can rotate relative to the side plate (220). The mounting base (223) is located inside the frame (221) and rotates with the frame (221). The driving component (222) is installed inside the first slide (210) and the second slide (211) and connected to the frame (221) so that the driving component (222) can drive the frame (221) to rotate.

6. A fully circular needle beam trolley based on compressed air energy storage according to claim 5, characterized in that, The first carriage (210) and the second carriage (211) are provided with at least one set of electromagnetic components (224), which magnetically attract the joint between the top plate (121).

7. A method for constructing a tunnel based on compressed air energy storage, used on the full-circular needle beam trolley as described in any one of claims 1-6, characterized in that, Includes the following steps: Excavate in layers using the step method to the design cross section, construct the initial support, and pre-embed grouting pipes on the initial support surface; After the connection is completed, check the circumferential dimensions and roundness, establish the construction benchmark for the secondary lining and record the geometric data; Determine the construction plan for the steel liner ring; According to the design, high-flow self-compacting concrete or conventional pumped concrete is used for segmented pouring and vibration is combined to control the pouring speed and quality. Grouting is carried out in sections at the pre-embedded grouting pipes, from bottom to top, and pressure testing is performed to ensure that the interface is full and free of voids. Demold the concrete after it reaches the demolding strength and meets the curing conditions, then inspect and repair any surface defects. After completing one section, the backstage vehicle slides to the next section, repeating the cycle of pouring, grouting, curing, and demolding, and recording construction data. The welds, grout fullness, concrete strength and geometric dimensions are inspected and accepted. After the test section passes the inspection, the construction is scaled up according to the schedule.

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