Inclined shaft TBM of pumped storage power station

Abstract

The utility model provides a pumped storage power station inclined shaft TBM which comprises a shield body, a conical expanding excavation cutterhead is arranged at the front end of the shield body, a main drive is arranged in the shield body, the conical expanding excavation cutterhead is connected with the main drive through a main bearing, and a plurality of front supports and rear supports are arranged on the periphery of the front end and the periphery of the rear end of the shield body respectively. The shield body between the front support and the rear support is provided with a thrust oil cylinder and a driving support shoe, and the pumped storage power station inclined shaft TBM creeps and advances under the cooperation of the front support, the rear support, the thrust oil cylinder and the driving support shoe. Besides, the pumped storage power station inclined shaft TBM is applied to a pilot shaft and TBM expanding excavation mechanical construction method, the problems that construction guidance and a formed hole body type are not easy to control, and an excavated hole is poor in flatness, poor in safety and the like existing in excavation of a drilling and blasting method can be solved, excavation of a traditional drilling and blasting method is eliminated, the hole forming quality is improved, disturbance to surrounding rock is reduced, potential safety hazards are reduced, and the construction period is shortened. Safe and efficient excavation of the water diversion inclined shaft in the pumped storage power station is guaranteed, and the construction period of key lines is shortened.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pumped storage power station construction technical field, especially a kind of pumped storage power station inclined shaft TBM. BACKGROUND

[0002] At present, in our country, the construction of pumped storage power station, the construction of water diversion inclined shaft generally adopts drill and blast method. However, drill and blast method construction has many shortcomings, mainly including: the difficulty of orientation control in the construction process, leading to the difficulty of controlling the shape of the hole; the flatness of the excavated hole is poor, and there are generally overbreak and underbreak problems; construction speed is slow; and construction safety is poor. These problems seriously restrict the safe and efficient construction of the water diversion inclined shaft of pumped storage power station, so that the water diversion inclined shaft often becomes the key line of project construction, increasing the risk and cost of the project.

[0003] Compared with the traditional drill and blast method construction, the tunnel boring machine (TBM) can reach 4 to 10 times the speed of conventional drill and blast method, and the best daily footage can reach 150 meters. TBM construction has the advantages of speed, quality, safety, economy, environmental protection and labor protection. Especially its efficient and fast construction capacity can make the project finish ahead of schedule, thus creating economic value in advance. TBM shows significant advantages in excavation efficiency, construction period, safety, surrounding rock stability, excavation accuracy and flatness. For the inclined shaft project with a lower shaped chamber, a small diameter vertical shaft can be excavated by a reverse drilling machine first, and then a reaming TBM is used to expand the water diversion inclined shaft, which not only provides a free surface for the expansion of the water diversion inclined shaft, but also provides a slag sliding channel for the top-down excavation.

[0004] Despite this, there are relatively few studies on the reaming TBM for water diversion inclined shaft of pumped storage power station and its construction method at present, and the related research mainly focuses on the inclined shaft TBM machine and its construction method. The existing non-blasting rock breaking technology, especially the inclined shaft reaming tunneling machine technology, represents an important direction of the development of inclined shaft construction technology. This technology has the advantages of low safety risk, high construction efficiency, small disturbance to surrounding rock and high degree of mechanization. However, in China, the application of inclined shaft reaming tunneling machine is not widespread, and there is no successful case of using inclined shaft reaming tunneling machine to construct water diversion inclined shaft. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a kind of pumped storage power station inclined shaft TBM.

[0006] Therefore, the above purpose of the utility model is realized by the following technical scheme:

[0007] The utility model provides a pumped storage power station inclined shaft TBM, include the shield body, the shield body front end is equipped with the conical expansion cutter head, be equipped with main drive in the shield body, the conical expansion cutter head is connected with main drive through main bearing, its characterized in that: the shield body front end periphery is equipped with a plurality of front supports, the shield body rear end periphery is equipped with a plurality of rear supports;

[0008] The shield body between the front support, rear support is equipped with the advance oil cylinder and the initiative support shoe, and the pumped storage power station inclined shaft TBM advances under the cooperation of the front support, rear support, advance oil cylinder and initiative support shoe.

[0009] While adopting the above technical scheme, the utility model also can adopt or combine to adopt the following technical scheme:

[0010] As a preferred technical scheme of the utility model: the conical expansion cutter head is equipped with the slag scraping part and the disc-shaped hob inside the slag scraping part.

[0011] As a preferred technical scheme of the utility model: the rear end of the shield body is equipped with the rear matched trolley, to assist operation.

[0012] As a preferred technical scheme of the utility model: the front end and the rear end of the shield body are connected through the main beam, one end of the main beam is connected with the main drive, and the other end of the main beam is connected with the rear end of the shield body.

[0013] As a preferred technical scheme of the utility model: the initiative support shoe is equipped with the concrete jet machine, and the concrete jet machine sprays concrete on the rock wall when the support shoe meets the fracture zone or broken zone, to ensure the integrity of the rock wall when the support shoe is tightened.

[0014] As a preferred technical scheme of the utility model: the front support is equipped with the advanced geological detector, to detect the geological conditions of the surrounding rock in front of the TBM, adjust the tunneling parameters of the TBM according to the geological conditions in front, and ensure the tunneling efficiency of the TBM.

[0015] The utility model provides a pumped storage power station inclined shaft TBM, and realizes the worm advance of the pumped storage power station inclined shaft TBM under the cooperation of the front support, rear support, advance oil cylinder and initiative support shoe, in addition, the pumped storage power station inclined shaft TBM is applied to the mechanical construction method of pilot hole+TBM expansion, can solve the problems of the construction guidance and the difficult control of the hole shape, the poor flatness of the excavation hole, the poor safety, etc. of the drilling and blasting method, gets rid of the traditional drilling and blasting method, improves the hole quality and reduces the disturbance to the surrounding rock, reduces the safety hidden danger, ensures the safe and efficient excavation of the water diversion inclined shaft in the pumped storage power station, and reduces the construction period of the key line. ACCURACY OF DRAWINGS

[0016] Figure 1The utility model provides a whole structure diagram of inclined shaft TBM of pumped storage power station. DETAILED DESCRIPTION

[0017] The utility model will be described further in detail with reference to the drawings and specific embodiments.

[0018] A pumped storage power station inclined shaft TBM, including shield body 3, shield body 3 front end is equipped with conical expansion cutterhead 1, shield body 3 is equipped with main drive 4, conical expansion cutterhead 1 is connected with main drive 4 through main bearing 2, shield body 3 front end periphery is equipped with a plurality of front support 5, shield body rear end periphery is equipped with a plurality of rear support 11;

[0019] Propelling cylinder 6 and active support shoe 9 are equipped on shield body 3 between front support 5 and rear support 11, and the pumped storage power station inclined shaft TBM is wriggled forward under the cooperation of front support 5, rear support 11, propelling cylinder 6 and active support shoe 9.

[0020] Conical expansion cutterhead 1 is equipped with slag scraping part 101 and disc-shaped cutter 102 inside slag scraping part 101. Conical expansion cutterhead 1 is conical cutterhead, adopts heavy structure, and conical expansion cutterhead 1 is connected with main bearing 2. 17 inches (432mm) disc-shaped center cutter, 19 inches (483mm) single-blade front cutter and edge cutter are arranged on conical expansion cutterhead, all cutters are back-mounted, and the wedge locking installation mode is used for cutter, and the load received can be evenly transmitted to cutter holder and cutterhead.

[0021] The rear end of shield body 3 is equipped with rear matching trolley 10.

[0022] The front end and the rear end of shield body 3 are connected through main girder 7, one end of main girder 7 is connected with main drive 4, and the other end of main girder 7 is connected with the rear end of shield body 3.

[0023] Concrete spraying machine 8 is arranged near active support shoe 9, and concrete is sprayed on the rock wall when the support shoe meets the fracture zone or the broken zone, so that the integrity of the rock wall is ensured when the support shoe is tightened. The front support 5 is provided with an advanced geological detector 12, which detects the geological conditions of the surrounding rock in front of the TBM, adjusts the tunneling parameters of the TBM according to the geological conditions in front of the TBM, and ensures the tunneling efficiency of the TBM.

[0024] Specifically, the above-mentioned pumped storage power station inclined shaft TBM can be applied to the following expansion mechanized construction method, comprising the following steps,

[0025] S1: excavate the water diversion upper tunnel and support, excavate the assembly chamber and the starting well from the water diversion upper tunnel, support the lock and the ring beam foundation at the starting well, arrange the gantry crane system above the assembly chamber to hoist the mechanical equipment, use the breaking hammer and the long arm excavator to excavate the starting well with a depth of 10m and a diameter of 8m, and form the starting platform at the lower part of the starting well.

[0026] S2: Install the directional drilling machine on the starting platform, and use the directional drilling machine to drill a directional hole of φ410mm along the central axis of the water diversion inclined shaft from top to bottom to meet the required drill pipe diameter for the construction of the raise-boring machine; install a wireless while-drilling inclinometer when the directional hole exceeds 30m, and use the measurement parameters to guide the directional control of the drilling trajectory to improve the accuracy of the directional hole; until the directional hole penetrates to the water diversion horizontal tunnel, the directional hole construction is completed, the directional drilling bit and the supporting inclinometer correction equipment are removed, and the directional drilling machine and the auxiliary equipment are removed using the gantry crane system;

[0027] S3: Install the raise-boring machine main machine and main and auxiliary pump stations on the starting platform, and use the raise-boring machine to conduct φ2m pilot hole construction along the φ410mm pilot hole from bottom to top; lower the raise-boring machine drill pipe along the φ410mm pilot hole to the lower end of the water diversion inclined shaft, transport the φ2m raise-boring reaming bit through the construction cross tunnel and the water diversion lower horizontal tunnel to the lower end of the water diversion inclined shaft, connect it with the raise-boring machine drill pipe, and then slowly raise the reaming bit from bottom to top for reaming construction; after the φ2m pilot hole reaming is completed, the raise-boring machine and the auxiliary equipment are removed using the gantry crane system;

[0028] S4: In order to facilitate the excavation of the TBM equipment, the original two-stage inclined shaft design form is optimized to a one-stage inclined shaft, and the hole diameter is unified to 6.5m.

[0029] Assemble the inclined hole reaming and tunneling machine inside the starting shaft, and after the TBM is assembled, enter the field debugging stage, mainly debugging the hydraulic system, electrical system and PLC control system;

[0030] S41: The TBM is assembled in the assembly chamber, which is arranged in the water diversion upper horizontal tunnel section, and the supported section is a city gate-shaped enlarged hole with a size of 15m (width) x 20m (height) x 40m (length). The front of the assembly chamber is a 37m long horseshoe-shaped stepping starting hole, and the starting hole section size is 37m x 6m x 8.2m;

[0031] S42: The TBM equipment includes a conical expansion excavation cutterhead 1, a shield body 3, a main drive 4, a thrust cylinder 6 and a rear supporting trolley 10. The overall assembly of the TBM is in the order from front to back. The conical expansion excavation cutterhead 1 is assembled in blocks, and the two unequal halves are assembled together. The conical expansion excavation cutterhead 1 includes a slag scraping component 101 and a disc cutter 102. The conical expansion excavation cutterhead 1 is a conical cutterhead with a heavy structure. The conical expansion excavation cutterhead 1 is connected with the main bearing 2. The conical expansion excavation cutterhead 1 is arranged with a 17 inch (432mm) disc center cutter, a 19 inch (483mm) single-blade front cutter and an edge cutter. All the cutters are back-mounted, and the cutters are installed in a wedge block locking manner, and the load can be uniformly transmitted to the cutter seat and the cutterhead;

[0032] S43: the rear end of the main bearing 2 is connected with the main drive 4, the main drive 4 drives the conical expansion cutter head to extrude and break the rock through the main bearing 2; the main drive 4 is connected with the main beam 7, the advancing oil cylinder 6 is located on the main beam 7, and the TBM advances forward through the contraction of the advancing oil cylinder 6;

[0033] S44: when the TBM is assembled, a field debugging stage is entered, mainly debugging the hydraulic system, the electrical system and the PLC control system.

[0034] S5: the TBM excavates and advances according to the design of the excavation section of 7.2 m and the climbing requirement of 39°, the excavated stone is dropped into the bottom of the inclined shaft through the guide well, and the self-unloading vehicle is used to discharge the stone at the bottom of the guide well;

[0035] S6: in the process of rock breaking of the TBM, the active support shoe 9 and the rear support 11 are tightly supported on the wall, in this stage, the whole system is supported by the active support shoe 9 and the rear support 11 of the TBM;

[0036] S7: in the advancing process, the advancing oil cylinder 6 on the main beam 7 starts to elongate, the TBM is pushed to advance, the main drive 4 drives the conical expansion cutter head 1 to rotate, the conical expansion cutter head 1 drives the disc-shaped roller cutter 102 to extrude and shear the rock in front, and the broken rock is discharged into the guide hole by the forward and backward stirring of the scraping component 101;

[0037] S8: after one advancing process is completed, the TBM starts to change steps, the active support shoe 9 and the rear support 11 are contracted, the advancing oil cylinder 6 starts to contract, the TBM is driven to move forward, and the supporting force of the front support 5 is increased, in this stage, the whole TBM is supported by the front support shoe 5;

[0038] S9: after the step-changing process is completed, the active support shoe 9 and the rear support 11 of the TBM are again tightly supported on the wall, and the next cycle of advancing is performed;

[0039] S10: the water diversion inclined shaft is excavated, the TBM is assembled in the chamber in the 1# water diversion horizontal hole, the TBM first completes the construction of the 1# water diversion inclined shaft, after the 1# water diversion inclined shaft advancing construction is completed, the TBM is disassembled in the chamber, and is transferred from the 1# construction branch hole to the 2# water diversion inclined shaft for assembly and advancing, the assembly, advancing and disassembly process of the TBM in the two water diversion inclined shafts are the same, and only the assembly, advancing and disassembly construction in the 1# water diversion inclined shaft are introduced in detail.

[0040] The above specific embodiments are used to explain and illustrate the utility model, and are only preferred embodiments of the utility model, rather than limiting the utility model, and any modification, equivalent replacement, improvement and the like made to the utility model within the spirit and protection scope of the claims of the utility model all fall into the protection scope of the utility model.

Claims

1. A TBM for inclined shaft of pumped storage power station, comprising a shield body (3), a tapered excavating cutter head (1) is arranged at the front end of the shield body (3), a main drive (4) is arranged in the shield body (3), and the tapered excavating cutter head (1) is connected with the main drive (4) through a main bearing (2), characterized in that: The front end of the shield body (3) is provided with a plurality of front supports (5), and the rear end of the shield body is provided with a plurality of rear supports (11); ​ The shield body (3) between the front supports (5) and the rear supports (11) is provided with a propelling oil cylinder (6) and a driving support shoe (9), and the TBM of the pumped storage power station is driven to move forward under the cooperation of the front supports (5), the rear supports (11), the propelling oil cylinder (6) and the driving support shoe (9).

2. The pumped storage power plant inclined shaft TBM of claim 1, characterized by: The conical expanding cutter head (1) is provided with a slag scraping component (101) and a disc-shaped cutter (102) inside the slag scraping component (101).

3. The pumped storage power plant inclined shaft TBM of claim 1, wherein: The rear end of the shield body (3) is provided with a rear matching trolley (10).

4. The pumped storage power plant inclined shaft TBM of claim 1, wherein: The front end and the rear end of the shield body (3) are connected through a main beam (7), one end of the main beam (7) is connected with a main drive (4), and the other end of the main beam (7) is connected with the rear end of the shield body (3).

5. The pumped storage power plant inclined shaft TBM of claim 1, wherein: The vicinity of the driving support shoe (9) is provided with a concrete spraying machine (8).

6. The pumped storage power plant inclined shaft TBM of claim 1, wherein: The vicinity of the front support (5) is provided with an advanced geological detector (12).

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