A rapid backfill device for excavated tunnel base used for TBM

Abstract

The present invention discloses a rapid backfilling device for the excavated tunnel base for TBM, which belongs to the field of additive manufacturing. It includes: a material preparation and transportation module, which is used to store and prepare concrete materials for rapid backfilling of the tunnel base, and transport the concrete materials and high-pressure air to the rapid backfilling module; a rapid backfilling module, which is fixed on the suspended steel frame at the rear of the engineering vehicle, with at least one supporting oil cylinder on each side of the suspended steel frame, and multiple spraying modules installed on the suspended steel frame, which spray concrete materials based on the spraying concrete process to quickly backfill the tunnel base; a temporary pavement laying module, which is used to lay a temporary pavement after the rapid backfilling module backfills the tunnel base. The present invention realizes the rapid backfilling of the excavated tunnel base, reduces the system complexity and energy loss, wherein the rapid laying and recycling of corrugated aluminum coils can prevent the base from being damaged and reduce manual adjustments, multiple spraying modules improve efficiency, and supporting oil cylinders ensure construction stability.

Description

Technical Field

[0001] The present invention belongs to the field of additive manufacturing, and in particular relates to a rapid backfilling device for a tunnel excavation base used in a TBM. Background Art

[0002] To efficiently construct tunnels capable of withstanding long-term loads and external forces such as earthquakes, tunnel boring machines (TBMs) are becoming the most widely used excavation equipment. Their construction process is broadly divided into four steps: excavation, mucking, support, and propulsion. To provide a continuous and uniform cutting surface, most TBMs feature a circular cutterhead, physically minimizing resistance and maximizing mechanical efficiency. This results in a circular cross-section of the newly excavated tunnel. However, to accommodate practical engineering requirements, such as the spatial constraints of railway, subway, or highway tunnels, most tunnel cross-sections are typically constructed in a horseshoe shape. This is achieved by installing specifically shaped concrete lining segments after TBM excavation. This typically involves adding an additional concrete layer to the bottom of the circular tunnel and modifying the lining of the sidewalls and roof. To accommodate the requirements of road or rail paving, the base of a horseshoe-shaped tunnel is designed to be flat. During the base filling process, different base filling methods are used depending on the surrounding rock conditions. The base filling method is usually divided into on-site cast lining filling, shotcrete lining filling and precast cast lining filling. It is one of the important processes in tunnel engineering. The quality of base filling directly affects the mechanical stability and durability of the tunnel engineering.

[0003] While existing technologies have developed a variety of base filling methods, they still have significant limitations under specific engineering conditions. In-situ cast-in-place lining requires a large amount of formwork and support materials, as well as extensive labor to install and remove these forms, resulting in high production costs. Shotcrete linings are subject to rebound during the spraying process, and the quality of the sprayed concrete lining is significantly affected by the operator's proficiency in the spraying equipment. This not only wastes construction materials but also affects the cleanliness and safety of the construction environment. Prefabricated cast-in-place linings, in addition to safety requirements, face road weight restrictions and transportation damage to the lining, resulting in high transportation costs. These base filling methods involve steel arch assembly, concrete pouring, finishing, lining maintenance, and strength testing, resulting in long production cycles and inability to quickly backfill the tunnel base into a flat surface to stabilize the newly excavated tunnel section for subsequent operations by construction personnel and equipment. In geologically unstable or loose soil conditions, the inability to quickly backfill can increase the risk of underground collapse or lateral movement. In areas with high groundwater levels or complex hydrological conditions, this inability to quickly backfill can also lead to water infiltration and accumulation. In addition, for emergency projects in ecologically sensitive, intensively developed or loose soil areas, existing technologies cannot achieve rapid backfilling, which can easily cause environmental pollution and increase the impact on the daily lives of local residents. Summary of the Invention

[0004] In view of the above problems, the present invention proposes a rapid backfilling device for the excavated tunnel base for TBM, so as to achieve rapid backfilling of the excavated tunnel base.

[0005] The technical solutions of the present invention are as follows:

[0006] A rapid backfill device for a tunnel excavation base used in a TBM, integrated into a tunnel excavation engineering vehicle, comprising:

[0007] A material preparation and transportation module, which is used to store and prepare concrete materials for rapid backfilling of the tunnel base and transport the concrete materials to the rapid backfill module;

[0008] The rapid backfill module is fixed to a suspended steel frame at the rear of the engineering vehicle and includes multiple movable spray modules mounted on the suspended steel frame guide rails. Each spray module is connected to a material preparation and delivery module. At least one supporting cylinder is provided on each side of the suspended steel frame. The multiple spray modules coordinately spray concrete materials based on the shotcrete process to quickly backfill the tunnel base.

[0009] The temporary pavement laying module is used to lay the temporary pavement after the rapid backfill module backfills the tunnel base. It includes a torsion motor, a height-adjusting cylinder, a corrugated aluminum coil, and a guide device. The two ends of the corrugated aluminum coil are installed on a suspended steel frame at the rear of the engineering vehicle through a pair of height-adjusting cylinders. Compared with the rapid backfill module, it is closer to the head of the engineering vehicle. The guide device is spliced ​​with the suspended steel frame to provide guidance for the laying of the corrugated aluminum coil; the torsion motor is used to control the forward or reverse rotation of the corrugated aluminum coil.

[0010] As a preferred embodiment of the present invention, the injection modules are arranged in two rows on the suspended steel frame guide rail at equal intervals, each row of injection modules is perpendicular to the moving direction of the engineering vehicle, and the two rows of injection modules can be driven independently.

[0011] As a preferred embodiment of the present invention, the supporting oil cylinder is located at the ends of the two rows of injection modules, and its position on the suspended steel frame can be adjusted along the moving direction of the engineering vehicle.

[0012] As a preferred embodiment of the present invention, the injection module includes a nozzle bracket, a pitch cylinder and a nozzle, the nozzle bracket is installed on the moving pair of the guide rail, the cylinder body of the pitch cylinder is hinged to the nozzle bracket, and the nozzle is hinged to the piston rod of the pitch cylinder and the nozzle bracket respectively, and can adjust the injection pitch angle under the drive of the piston rod of the pitch cylinder.

[0013] As a preferred embodiment of the present invention, the cylinder body of the height adjustment cylinder in the temporary pavement paving module is fixed, and the piston rod is connected to the corrugated aluminum coil. When the piston rod is extended, the corrugated aluminum coil is separated from the suspended steel frame and can rotate forward or reverse under the drive of the torsion motor; when the piston rod is retracted, the corrugated aluminum coil contacts the suspended steel frame to achieve fixation.

[0014] As a preferred embodiment of the present invention, the guide device in the temporary pavement paving module includes a first guide plate and a second guide plate, the first guide plate is horizontally fixed on the suspended steel frame and is not higher than the lowest height of the corrugated aluminum coil when it rotates, and the second guide plate is obliquely spliced ​​downstream of the first guide plate and does not touch the ground.

[0015] As a preferred embodiment of the present invention, guide rollers are provided on the first guide plate and / or the second guide plate.

[0016] As a preferred embodiment of the present invention, the width of the corrugated aluminum coil is not less than the wheelbase of the engineering vehicle.

[0017] As a preferred embodiment of the present invention, the material preparation and delivery module includes a concrete delivery pipeline and a high-pressure air pipeline, which are respectively used to deliver fresh concrete and high-pressure air to the injection module; the fresh concrete is obtained by real-time mixing and stirring in a material bin arranged on the engineering vehicle.

[0018] The beneficial effects of the present invention are:

[0019] (1) This invention integrates a material preparation and transportation module, a rapid backfill module, and a temporary pavement paving module into a tunnel excavation vehicle, enabling rapid backfilling of the tunnel base excavated by a TBM. This solves the high time cost and complex spatial distribution issues inherent in traditional processes due to the separation of production, transportation, and installation. This technology breaks through the reliance on lining trailers, lining cranes, lining assembly machines, and other equipment in traditional construction. While ensuring the long-term stability of the base, it significantly reduces system complexity and energy loss, while providing a hardware foundation for adaptive control of process parameters for rapid backfilling of the tunnel base.

[0020] (2) The present invention combines a torsion motor and a height adjustment cylinder to release and recycle the corrugated aluminum coils, enabling rapid paving and reclaiming of temporary pavement. This design increases the load-bearing area of ​​the unhardened substrate, preventing damage caused by direct rolling of the unhardened substrate by construction vehicles. Furthermore, the guide device reduces the labor intensity of manually adjusting the direction of the corrugated aluminum coils, thus achieving the coordinated operation of dynamic backfilling and temporary pavement paving.

[0021] (3) The present invention solves the problem of low efficiency of spraying concrete in single filaments layer by layer by arranging multiple spraying modules perpendicular to the movement direction of the engineering vehicle, thereby improving the control accuracy of the backfill base morphology and size; combined with an independently movable support cylinder, it balances the reaction force generated by the sprayed concrete and the lateral force when the corrugated aluminum coil is uneven, ensuring construction stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a rapid backfill device for excavated tunnel base used in TBM;

[0023] Figure 2 It is a schematic diagram of the overall structure from another perspective;

[0024] Figure 3 It is a top view of the overall structure;

[0025] Figure 4 It is the structural diagram of the material preparation and transportation module;

[0026] Figure 5 This is the structure diagram of the fast backfill module;

[0027] Figure 6 It is the structural diagram of the injection module;

[0028] Figure 7 This is a structural diagram of temporary road paving modules mounted on engineering vehicles and suspended steel frames;

[0029] In the figure: 1- engineering vehicle, 2- material preparation and transportation module, 3- concrete transportation pipeline, 4- high-pressure air pipeline, 5- suspended steel frame, 6- rapid backfill module, 7- temporary road paving module, 201- first material storage bin, 202- second material storage bin, 203- mixing station, 204- high-pressure air pump, 601- injection module, 6011- nozzle support plate, 6012- nozzle bracket, 6013- pitch cylinder, 6014- nozzle, 602- injection module linear guide, 603- drive motor, 701- torsion motor, 702- height adjustment cylinder 703- corrugated aluminum coil, 704- first guide plate, 705- second guide plate, 706- support cylinder, 707- support cylinder linear guide. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0033] The accompanying drawings show various structural schematic diagrams of the embodiments disclosed in the present invention. These drawings are not drawn to scale, and some details are exaggerated and may be omitted for the purpose of clarity.

[0034] This invention proposes a rapid backfill device for tunnel excavation by TBMs (Transport Bus Machines) that focuses on a critical step in tunnel construction: rapid backfilling of the base. This relies on minimizing the time and space required for tunnel base production and assembly, reducing the number of intermediate steps involved. Key design concepts include: integrating the material preparation and delivery module, the rapid backfill module, and the temporary pavement paving module onto the construction vehicle; arranging multiple injection modules perpendicular to the vehicle's direction of motion; enhancing overall device stability through two independently movable support cylinders; and utilizing a torsion motor in conjunction with a height-adjustable cylinder to release and recycle corrugated aluminum coils.

[0035] like Figure 1-3 The diagram shows the structure of the rapid backfill device for excavated tunnel bases from different perspectives. Suitable for horseshoe-shaped tunnel sections of varying sizes, it consists of three main components: a material preparation and delivery module 2, a rapid backfill module 6, and a temporary pavement paving module 7. To more clearly illustrate the complete structure, the diagram also illustrates an engineering vehicle 1, a concrete delivery pipeline 3, a high-pressure air pipeline 4, and a suspended steel frame 5.

[0036] Among them, the material preparation and transportation module is mainly responsible for storing and preparing concrete materials for rapid backfilling of the tunnel base, and transporting the concrete materials to the rapid backfill module.

[0037] The rapid backfill module is fixed to the suspended steel frame at the rear of the engineering vehicle. It is mainly responsible for quickly backfilling the tunnel base with the help of the shotcrete process. It includes multiple movable shotcrete modules installed on the guide rails of the suspended steel frame. Each shotcrete module is connected to the material preparation and conveying module. At least one supporting cylinder is provided on each side of the suspended steel frame. The multiple shotcrete modules coordinate to spray concrete materials based on the shotcrete process to quickly backfill the tunnel base.

[0038] The temporary pavement laying module includes a torsion motor, a height-adjusting cylinder, a corrugated aluminum coil and a guide device. The two ends of the corrugated aluminum coil are installed on a suspended steel frame at the rear of the engineering vehicle through a pair of height-adjusting cylinders. Compared with the rapid backfill module, it is closer to the head of the engineering vehicle. The guide device is spliced ​​with the suspended steel frame to provide guidance for the laying of the corrugated aluminum coil; the torsion motor is used to control the forward or reverse rotation of the corrugated aluminum coil; it is mainly responsible for paving the temporary pavement after the rapid backfill module backfills the base to increase the force-bearing area, and prevent the engineering vehicle from moving directly on the incompletely hardened base and causing damage to the base.

[0039] In addition, during the rapid backfilling process of the tunnel base, the material preparation and transportation module, the rapid backfilling module and the temporary pavement paving module are all arranged on the engineering vehicle, effectively ensuring the mobility and flexibility of the rapid backfilling device for the excavation tunnel base used by the TBM.

[0040] like Figure 3 As shown, the material preparation and delivery module 2 is arranged in a "pin-shaped" shape and is connected to the engineering vehicle 1 via threads. One end of the concrete delivery pipeline 3 is connected to the material preparation and delivery module 2 via a flange, and the pipeline is fixed to the suspended steel frame 5 via a right-angle pipe joint. The other end is connected to the rapid backfill module 6. One end of the high-pressure air pipeline 4 is connected to the material preparation and delivery module 2 via a hose joint, and the pipeline is fixed to the suspended steel frame 5 via a right-angle pipe joint. The other end is connected to the rapid backfill module 6. The suspended steel frame 5 is directly fixed to the engineering vehicle 1 by welding. The suspended steel frame 5 not only provides space for the arrangement of the concrete delivery pipeline 3 and the high-pressure air pipeline 4, but also improves the overall stability of the rapid backfill device. The rapid backfill module 6 is connected to the suspended steel frame 5 via threaded holes arranged at the end of the suspended steel frame 5. The present invention arranges the concrete delivery pipeline and the high-pressure air pipeline in the suspended steel frame as much as possible, reducing the space occupied by the pipelines and avoiding the problem of accelerated damage that may occur due to the pipelines being exposed to the outside.

[0041] like Figure 4As shown, the material preparation and transportation module 2 primarily comprises a first material storage silo 201, a second material storage silo 202, a mixing station 203, and a high-pressure air pump 204. The first and second material storage silos 201 and 202 are each connected to the mixing station 203 via a ball valve. The mixing station 203 is connected to the concrete delivery pipeline 3 via a flange, and the high-pressure air pump 204 is connected to the high-pressure air pipeline 4 via a hose connector. For example, the first material storage silo 201 stores a premixed dry mix of cement-based materials (such as Portland cement and fly ash) and fine aggregate (sand), which may contain some chemical admixtures (such as a water reducer). The second material storage silo 202 stores coarse aggregate (crushed stone or pebbles) and liquid water, which can be physically separated within the silos. The materials in the two silos can be quickly and evenly mixed within the mixing station 203 to meet the requirements for fresh concrete for tunnel base backfill.

[0042] like Figure 5 As shown, the rapid backfill module mainly includes an injection module 601, an injection module linear guide 602, and a drive motor 603. Multiple injection modules 601 are arranged on the injection module linear guide 602 via pulleys and are driven by the drive motor 603 to move on the guide 602. For example, the drive motor 603 drives the lead screw inside the guide to rotate, and the nut on the lead screw moves linearly along the lead screw axis. Each injection module 601 is connected to the nut via a slider.

[0043] like Figure 6 As shown, the spray module mainly includes a nozzle support plate 6011, a nozzle bracket 6012, a pitch cylinder 6013, and a nozzle 6014. The nozzle support plate 6011 is connected to the nozzle bracket 6012 through a threaded hole provided in an annular direction thereon. The cylinder body of the pitch cylinder 6013 is hinged to the nozzle bracket 6012. The nozzle 6014 is hinged to the piston rod of the pitch cylinder 6013 and the nozzle bracket 6012, respectively. The spray modules are arranged in two rows with equal spacing on the suspended steel frame guide rail. Each row of spray modules is perpendicular to the direction of movement of the engineering vehicle, and the two rows of spray modules can be driven independently. By arranging multiple spray modules perpendicular to the direction of movement of the engineering vehicle, the problem of low construction efficiency caused by the layer-by-layer single-filament spraying of shotcrete is solved.

[0044] like Figure 7As shown, the temporary pavement paving module 7 primarily comprises a torsion motor 701, a height adjustment cylinder 702, a corrugated aluminum coil 703, a first guide plate 704, a second guide plate 705, a support cylinder 706, and a support cylinder linear guide 707. The torsion motor 701 is directly connected to the height adjustment cylinder 702 via welding. The height adjustment cylinder 702 functions as a moving pair to achieve relative motion with the suspended steel frame 5. The cylinder body of the height adjustment cylinder 702 is fixed, while the piston rod is retractable to raise and lower the corrugated aluminum coil 703. The corrugated aluminum coil 703 is keyed to the output shaft of the torsion motor 701, enabling forward and reverse rotation. The width of the corrugated aluminum coil is no less than the wheelbase of the construction vehicle. The first guide plate 704 is welded horizontally directly to the suspended steel frame 5, while the second guide plate 705 is welded downstream of the first guide plate 704 and does not contact the ground. The first and second guide plates 704 and 705 primarily guide the placement of the corrugated aluminum coils 703, and both guide plates can be equipped with guide rollers. The cylinder body of the support cylinder 706 is fixed to the slider of the support cylinder linear guide 707. The support cylinder linear guide 707 is connected to the suspended steel frame 5 via threaded holes arranged on both sides of the suspended steel frame 5. The use of at least two independently movable support cylinders enhances the stability of the overall assembly, balancing the reaction force generated by the shotcrete and the lateral force generated by the uneven placement of the corrugated aluminum coils, thereby achieving efficient and stable construction for rapid backfilling of the tunnel base.

[0045] The present invention realizes the release and recovery of corrugated aluminum coils through a torsion motor in conjunction with a height-adjusting oil cylinder, thereby completing the rapid laying and recovery of temporary pavement. While preventing engineering vehicles from moving directly on an incompletely hardened substrate and causing damage to the substrate, it also reduces material loss and labor intensity.

[0046] The control method of the above-mentioned excavated tunnel base rapid backfill device is as follows:

[0047] The engineering vehicle 1 travels backwards in the direction of the TBM tunnel excavation. During the travel, the excavated tunnel base is backfilled in sections. Before each section is backfilled, considering that during the construction process of rapid backfilling of the tunnel base, the reaction force generated by the shotcrete and the lateral force generated by the uneven laying of the corrugated aluminum coil may cause the entire device to be unstable, before each section is backfilled, the support cylinder 706 slides on the support cylinder linear guide 707 to find a suitable balanced support position. At the same time, the support cylinder 706 extends and supports the tunnel arch bottom, thereby improving the overall stability of the TBM tunnel base rapid backfill device during the construction process.

[0048] During the backfill process, the first and second material storage bins 201 and 202 transport the stored materials to the mixing station 203 for mixing, producing fresh concrete for rapid backfilling of the TBM-excavated tunnel base. This concrete is then delivered to the nozzle 6014 in the injection module 601 via the concrete delivery pipeline 3. The high-pressure air pump 204 also delivers high-pressure air to the nozzle 6014 in the injection module 601 via the high-pressure air pipeline 4. The fresh concrete and high-pressure air are mixed at the nozzle 6014 and sprayed onto the TBM-excavated tunnel base. The combined movement of the injection module 601 along the injection module linear guide 602 and the movement of the pitch cylinder 6013 form multiple spray filaments, which, after stacking layer by layer, form the TBM-excavated tunnel base. After spraying is complete, the support cylinder is recovered. The topography and dimensions of the backfill base are determined by factors such as the material properties, nozzle height, nozzle diameter, spray angle, and volumetric flux, and are not limited by this invention.

[0049] After backfilling, while the base has not yet fully hardened, in order to increase the stress-bearing area of ​​the unhardened base and reduce the time between base preparation and use, a height adjustment cylinder 702 drives a torsion motor 701 and corrugated aluminum coil 703 to extend from the suspended steel frame 5. Driven by torsion motor 701, corrugated aluminum coil 703 rotates to release it, with the release speed controlled by a control system inputting a signal to torsion motor 701. The aluminum sheet released from corrugated aluminum coil 703 is quickly laid as a temporary pavement under the guidance of first and second guide plates 704 and 705. The wheels of construction vehicle 1 press against the temporarily laid corrugated aluminum coil 703, driving backward in the direction of tunnel excavation to the next target backfill section. The height adjustment cylinder then lowers the corrugated aluminum coil 703 and retracts it into the suspended steel frame, repeating the construction of this backfill section.

[0050] After the TBM excavation tunnel base is quickly backfilled, the torsion motor 701 rotates in the opposite direction to retract the corrugated aluminum coil 703, and the height adjustment cylinder 702 retracts into the suspended steel frame 5. The above process realizes the rapid backfilling of the excavated tunnel base, and solves the problems of high time cost and complex spatial distribution that may be caused by the need to go through multiple links such as production, transportation, and installation in the backfill construction.

[0051] The above examples are merely specific embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and many variations are possible. All variations that can be directly derived or imagined by a person skilled in the art from the disclosure of the present invention should be considered to be within the scope of protection of the present invention.

Claims

1. A control method for a rapid backfill device for a tunnel excavation base used in a TBM, wherein the rapid backfill device for the tunnel excavation base is integrated into a tunnel excavation engineering vehicle, characterized in that: The rapid backfill device for excavated tunnel base includes: A material preparation and transportation module, which is used to store and prepare concrete materials for rapid backfilling of the tunnel base and transport the concrete materials to the rapid backfill module; The rapid backfill module is fixed to a suspended steel frame at the rear of the engineering vehicle and includes multiple movable spray modules mounted on the suspended steel frame guide rails. Each spray module is connected to a material preparation and delivery module. At least one supporting cylinder is provided on each side of the suspended steel frame. The multiple spray modules coordinately spray concrete materials based on the shotcrete process to quickly backfill the tunnel base. The temporary pavement laying module is used to lay temporary pavement after the rapid backfill module backfills the tunnel base. It includes a torsion motor, height adjustment cylinders, corrugated aluminum coils, and a guide device. The ends of the corrugated aluminum coils are mounted on a suspended steel frame at the rear of the engineering vehicle via a pair of height adjustment cylinders. This is closer to the front of the engineering vehicle than the rapid backfill module. The guide device is spliced ​​with the suspended steel frame to provide guidance for laying the corrugated aluminum coils. The torsion motor is used to control the forward and reverse rotation of the corrugated aluminum coils. The engineering vehicle travels backwards in the direction of the tunnel excavation. During the travel, the excavated tunnel is backfilled in sections. The control method of the rapid backfilling device for the excavated tunnel base includes: The engineering vehicle backs up to the target backfill section and stops. The position of the support cylinder on the rear suspension steel frame is adjusted according to the road conditions. The piston rod of the support cylinder is controlled to extend and support the bottom of the tunnel arch. Concrete material and high-pressure air are transported to the injection module through pipelines. The two are mixed in the injection module and sprayed onto the excavated tunnel arch base. The injection module is controlled to move perpendicular to the direction of movement of the engineering vehicle. The spray filaments are stacked layer by layer to form the excavated tunnel base. After the spraying is completed, the support cylinder is recovered. The height adjustment cylinder drives the corrugated aluminum coil upward to free it from the restraints of the suspended steel frame. The torsion motor controls the forward rotation of the corrugated aluminum coil. The aluminum sheet released by the corrugated aluminum coil is guided by the guide device and extended to the base of the excavated tunnel. It is quickly laid as a temporary road surface. The construction vehicle's wheels press on the temporary road surface and reverse along the direction of the excavated tunnel to the next target backfill section. The height adjustment cylinder drives the corrugated aluminum coil downward to retract into the suspended steel frame, and construction of the backfill section is repeated. After the backfill construction of the excavated tunnel base is completed, the engineering vehicle completely drives away from the excavated tunnel, the reversing motor controls the reversal of the corrugated aluminum coil to recycle the corrugated aluminum coil, and the height adjustment cylinder drives the corrugated aluminum coil to descend and retract into the suspended steel frame.

2. The control method for a rapid backfill device for a TBM excavated tunnel base according to claim 1, characterized in that: The injection modules are arranged in two rows on the suspended steel frame guide rail at equal intervals. Each row of injection modules is perpendicular to the moving direction of the engineering vehicle, and the two rows of injection modules can be driven independently.

3. The control method for a rapid backfill device for a TBM excavated tunnel base according to claim 2, characterized in that: The supporting oil cylinder is located at the ends of the two rows of injection modules, and its position on the suspended steel frame can be adjusted along the moving direction of the engineering vehicle.

4. The control method for a rapid backfill device for a TBM excavated tunnel base according to claim 1, characterized in that: The injection module includes a nozzle bracket, a pitch cylinder and a nozzle. The nozzle bracket is installed on the moving pair of the guide rail. The cylinder body of the pitch cylinder is hinged to the nozzle bracket. The nozzle is hinged to the piston rod of the pitch cylinder and the nozzle bracket respectively, and can adjust the injection pitch angle under the drive of the piston rod of the pitch cylinder.

5. The control method for a rapid backfill device for a TBM excavated tunnel base according to claim 1, characterized in that: The cylinder body of the height adjustment oil cylinder in the temporary pavement paving module is fixed, and the piston rod is connected to the corrugated aluminum coil. When the piston rod is extended, the corrugated aluminum coil is separated from the suspended steel frame and can rotate forward or reverse under the drive of the torsion motor; when the piston rod is retracted, the corrugated aluminum coil contacts the suspended steel frame to achieve fixation.

6. The control method for a rapid backfill device for a TBM excavated tunnel base according to claim 1, characterized in that: The guide device in the temporary pavement paving module includes a first guide plate and a second guide plate. The first guide plate is horizontally fixed on the suspended steel frame and is not higher than the lowest height of the corrugated aluminum coil when it rotates. The second guide plate is obliquely spliced ​​downstream of the first guide plate and does not touch the ground.

7. The control method for a rapid backfill device for a TBM excavated tunnel base according to claim 6, characterized in that: Guide rollers are provided on the first guide plate and / or the second guide plate.

8. The control method for a rapid backfill device for a TBM excavated tunnel base according to claim 1, characterized in that: The width of the corrugated aluminum coil is not less than the wheelbase of the engineering vehicle.

9. The control method for a rapid backfill device for a TBM excavated tunnel base according to claim 1, characterized in that: The material preparation and delivery module includes a concrete delivery pipeline and a high-pressure air pipeline, which are respectively used to deliver fresh concrete and high-pressure air to the injection module; the fresh concrete is obtained by real-time mixing and stirring in a material bin arranged on the engineering vehicle.

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