Water diversion inclined shaft full-section TBM main engine starting system

Abstract

The utility model relates to the technical field of inclined shaft construction, and discloses a water diversion inclined shaft full-section TBM main engine starting system which comprises a horizontally-arranged assembly hole and a starting hole obliquely communicated with the assembly hole, the assembly hole and the starting hole are in transition connection through an arc-shaped section, and stepping rails are sequentially laid in the direction of the assembly hole, the arc-shaped section and the starting hole. A plurality of stepping oil cylinders are arranged on the stepping track and are respectively connected with a shield and an outer key of the TBM main machine. According to the water diversion inclined shaft full-section TBM main engine starting system, construction difficulty can be lowered, manpower and material resources are reduced, cost is lowered, and safety and stability during construction are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of full-face TBM host starting system of water diversion inclined shaft, belong to inclined shaft construction technical field. BACKGROUND

[0002] Water diversion inclined shaft is important building in pumped storage power station, its feature is steep angle, diameter is big, length is long, so construction difficulty is big.The excavation construction of traditional water diversion inclined shaft is all using drill and blast method, its main shortcomings are as follows: construction orientation and hole shape are not easy to control;Excavation hole is poor in flatness, overbreak and underbreak problem is universal;Construction speed is slow;Safety is poor, etc.

[0003] In recent years, domestic TBM tunneling equipment develops rapidly, which provides equipment support for accelerating water diversion inclined shaft construction.For example, in the prior art, the patent for invention with publication number CN112343608A discloses a kind of inclined shaft TBM starting system and starting method, and its technical scheme includes: setting step starting station device at the intersection of starting chamber and inclined shaft, step starting station device includes first starting frame set at the bottom of starting chamber and second starting frame set on the wall of inclined shaft, first starting frame is rotationally arranged at the bottom of starting chamber by rotating mechanism, recess is excavated at the bottom of starting chamber, and support frame is detachably arranged in the recess.In the patent, the inclined shaft TBM host is assembled on the first starting frame by the jacking device, so that the assembled inclined shaft TBM is located on the first starting frame, under the assistance of jacking device, the inclined shaft TBM host and the first starting frame rotate around the rotating mechanism, so that the first starting frame and the second starting frame are successfully connected, forming a straight road frame, then the inclined shaft TBM host is moved to the second starting frame by the pulling cylinder on the first starting frame, and the first starting frame is restored to the initial horizontal position and supported by the support frame, thereby realizing the starting of the inclined shaft TBM host.The starting system in the patent is suitable for large-gradient inclined shaft TBM starting work, and overcomes the shortcomings of traditional water diversion inclined shaft excavation construction method.But the patent still has the following defects: since the entire inclined shaft TBM host and the first starting frame need to be rotated together, there are problems such as great construction difficulty, high manpower, material resources and cost, and difficult to guarantee safety and stability performance. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of full-face TBM host starting system of water diversion inclined shaft, solve the problems such as great construction difficulty, high manpower, material resources and cost, and difficult to guarantee safety and stability performance existing in the prior art TBM host starting system.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is:

[0006] A diversion inclined shaft full-face TBM host launching system, comprising a horizontal assembly hole and a launching hole obliquely communicated with the assembly hole, the assembly hole and the launching hole being connected through an arc segment, a stepping track being laid along the assembly hole, the arc segment and the launching hole in sequence, and a plurality of stepping oil cylinders being arranged on the stepping track and connected with a shield and an outer key of the TBM.

[0007] The shield and the outer key of the TBM host are pushed by the plurality of stepping oil cylinders, so that the TBM host moves on the stepping track, and the TBM host can be directly pushed from the assembly hole to the launching hole along the arc segment, and the launching of the TBM host is completed.

[0008] Further, the stepping track comprises a flat segment guide rail fixed in the assembly hole, an arc segment guide rail fixed on the arc segment and an inclined segment guide rail fixed in the launching hole, and the flat segment guide rail, the arc segment guide rail and the inclined segment guide rail are connected in sequence.

[0009] Further, the arc segment is in the shape of a step arranged along the axis direction of the assembly hole.

[0010] Compared with the prior art, the utility model has the advantages that:

[0011] 1. The utility model discloses a step-shaped arc segment, which can reduce the excavation workload of the assembly hole, reduce the amount of concrete pouring of the stepping track that needs to be fixed by concrete, and reduce the construction difficulty of the stepping track.

[0012] 2. The utility model discloses a step-shaped arc segment, which can reduce the excavation workload of the assembly hole, reduce the amount of concrete pouring of the stepping track that needs to be fixed by concrete, and reduce the construction difficulty of the stepping track. DRAWINGS

[0013] Fig. 1 It is the structural schematic view of the assembly hole and the launching hole of the utility model;

[0014] Fig. 2 It is the structural schematic view of the TBM host on the flat segment guide rail of the utility model;

[0015] Fig. 3 It is the connection structure schematic view of the flat segment guide rail and the concrete foundation in the assembly hole of the utility model;

[0016] Fig. 4 It is the connection structure schematic view of the inclined segment guide rail and the concrete foundation in the launching hole of the utility model.

[0017] In the drawings

[0018] 1. Starting tunnel; 11. Inclined and straight section; 2. Assembly tunnel; 21. Horizontal section; 3. Arc section; 4. Stepping track; 41. Horizontal section guide rail; 42. Arc section guide rail; 43. Inclined section guide rail; 5. Stepping cylinder; 6. TBM main unit; 61. Shield; 62. Outer shell; 7. Concrete foundation; 71. Steel plate; 72. Anchor bar; 8. Reaction support; 9. Pin shaft. Detailed Implementation

[0019] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. For ease of description, the terms "up," "down," "left," and "right" appearing below only indicate that they correspond to the up, down, left, and right directions in the accompanying drawings and do not limit the structure.

[0020] Example 1

[0021] like Figs. 1 to 4 As shown, a full-section TBM (Tunnel Boring Machine) main unit launching system suitable for steep-angle, large-diameter inclined wells includes a horizontally arranged assembly tunnel 2 and a launching tunnel 1 inclinedly connected to the assembly tunnel 2. An arc-shaped section 3 is provided within the assembly tunnel 2 between the assembly tunnel 2 and the launching tunnel 1, providing a transitional connection. Stepping tracks 4 are sequentially fixed along the directions of the assembly tunnel 2, the arc-shaped section 3, and the launching tunnel 1 via concrete foundations 7. The stepping tracks 4 are symmetrically arranged about the axes of the assembly tunnel 2, the arc-shaped section 3, and the launching tunnel 1. Several stepping cylinders 5 are connected to the stepping tracks 4, and these cylinders are respectively connected to the shield 61 and outer armor 62 of the TBM main unit 6. By pushing the shield 61 and outer armor 62 of the TBM main unit 6 with the stepping cylinders 5, the TBM main unit 6 moves on the stepping tracks 4, thereby slowly pushing the TBM main unit 6 directly from the assembly tunnel 2 along the arc-shaped section 3 into the launching tunnel 1, completing the launching of the TBM main unit 6.

[0022] In the embodiment, the step track 4 is composed of three types of guide rails, i.e., the flat section guide rail 41 fixed on the horizontal section 21 at the bottom of the assembly hole 2, the arc guide rail 42 fixed on the arc section 3, and the inclined section guide rail 43 fixed on the inclined straight section 11 at the bottom of the starting hole 1. In order to realize the overall stress of the step track 4 and the concrete foundation 7, the three types of guide rails, i.e., the flat section guide rail 41, the arc guide rail 42, and the inclined section guide rail 43, are sequentially butt-welded. The connection mode of the step track 4 and the concrete foundation 7 is as follows: a plurality of steel plates 71 and a plurality of anchor bars 72 welded with the steel plates 71 are pre-buried in the concrete foundation 7, and the step track 4 is welded with the steel plates 71; in order to meet the requirement of the step pushing force, the number of the steel plates 71 pre-buried in the concrete foundation 7 corresponding to each type of guide rail should not be less than 2; if necessary, the step track 4 and the concrete foundation 7 are reinforced by using anchor rods, and in the specific implementation, the upper exposed part of the anchor rod is welded with the step track 4 (the arc guide rail 42 and the inclined section guide rail 43), and the lower part of the anchor rod is inserted into the rock soil of the concrete foundation 7 and / or the hole (i.e., the assembly hole 2, the arc section 3, and the starting hole 1), and the rock-embedding depth and the diameter of the anchor rod should meet the requirements of the anti-pulling and anti-shearing. The flat section guide rail 41 can not be reinforced by using the anchor rod, and the guide rail can be directly connected with the concrete foundation 7 by using the expansion bolts.

[0023] According to the Technical Code for Rock Soil Anchor and Shotcrete Support Engineering GB 50086-2015, the anchor bar anti-pulling bearing capacity and the anchor bar anchoring length are calculated as follows: L a ≥ KN d / πDf mg ψ, L a ≥ KN d / n πdf ms ξ.

[0024] N d — the axial tension design value of the anchor bar or unit anchor bar (kN); L a — the anchoring length (m); f mg — the standard value of the ultimate bond strength between the anchoring section grouting body and the stratum (MPa); f ms — the design value of the bond strength between the anchoring section grouting body and the bar body (MPa); D— the drilling diameter of the anchoring section of the anchor bar; d— the diameter of the steel bar; K— the bond anti-pulling safety factor between the anchoring section grouting body and the stratum; ξ— the interface bond strength reduction coefficient when two or more steel bars are used, and the value is 0.70-0.85; ψ— the influence coefficient of the anchoring length on the ultimate bond strength; n— the number of steel bars or steel strands.

[0025] Anchor bar steel bar cross-sectional area calculation: according to the Technical Code for Rock Soil Anchor (Cable) (CECS22-2005), A S ≥ K t N d / f ykThe safety factor K of the anchor rod body against tension t = 2.2, the design value of the tensile strength of the reinforcing bar f yk = 360 KN / mm 2 .

[0026] Since the inclined guide rail 43 bears a large thrust, if the anchor rod is used for reinforcement, the weld between the exposed part of the upper part of the anchor rod and the inclined guide rail 43 is a double-welded side fillet weld (the force is perpendicular to the length direction of the weld). In order to make the welding force of the anchor rod and the inclined guide rail 43 meet the requirements, the strength is calculated according to the following formula:

[0027]

[0028] In the formula: N - axial tension and compression force; h f - weld leg size: according to the minimum weld leg size and maximum weld leg size requirements; l w - fillet weld calculation length; h e - fillet weld calculation thickness; - fillet weld strength design value: Q235 steel, E43 welding rod manual welding corresponding If

[0029] In this embodiment, in order to facilitate the arrangement of the step rail 4, reduce the excavation workload of the assembly hole 2 and the amount of concrete pouring required for the step rail 4 to be fixed with concrete, and reduce the construction difficulty of the step rail 4, the inner arc segment 3 of the assembly hole 2 is excavated into a stepped shape arranged along the axis direction of the assembly hole 2. The steel reinforced concrete foundation 7 arranged on the step is used to connect with the arc guide rail 42. The width of the concrete foundation 7 meets the arrangement requirements of the arc guide rail 42 and meets the local shear capacity requirements. The height of the concrete foundation 7 gradually changes with the rising of the step.

[0030] In this embodiment, the assembly hole 2 adopts a city gate shape, the starting hole 1 adopts a horseshoe shape or a circular shape, and the water diversion inclined shaft adopts a circular cross section. The three types of guide rails (flat segment guide rail 41, arc guide rail 42, and inclined segment guide rail 43) are all made of a plurality of plates, which can be made by surrounding welding a plurality of steel plates 71. The part in contact with the TBM main machine 6 is an inclined plate, or in other words, the TBM main machine 6 (the part of the shield 61 and the outer shell 62) is tangent to the position where the guide rail is in contact. This facilitates the movement of the TBM main machine 6 on the step rail 4.

[0031] In the embodiment, the four step cylinders 5 are arranged symmetrically about the center axis of the TBM main machine 6 or about the step direction, two of which are arranged behind the shield 61 of the TBM main machine 6, and the other two are arranged behind the outer armor (the second outer armor 62) of the TBM main machine 6. A plurality of counterforce supports 8 are fixed on the step track 4 by the pin shafts 9, the number and arrangement of the counterforce supports 8 are adapted to the number and arrangement of the step cylinders 5 respectively. In the embodiment, there are four counterforce supports 8, one end of each of the two step cylinders 5 is hinged to two counterforce supports 8 through the pin shafts 9, and the other end is hinged to the lug structure on the shield 61, and one end of each of the other two step cylinders 5 is also hinged to two counterforce supports 8 through the pin shafts 9, and the other end is hinged to the lug structure on the outer armor.

[0032] During the step, the four step cylinders 5 work simultaneously to push the shield 61 and the outer armor 62, i.e. to push the entire TBM main machine 6 to move on the step track 4. After the completion of one pushing, the step changing is needed. During the step changing, the two step cylinders 5 (behind the shield 61 or behind the outer armor 62) remain in the pushing state, and the other two step cylinders 5 are retracted after the removal of the counterforce supports 8 connected thereto and the connection of the step track 4, to drive the counterforce supports 8 connected thereto to move forward, and then the two step cylinders 5 and the two counterforce supports 8 which remain in the supporting state are also retracted, and the counterforce supports 8 are reconnected and installed on the step track 4, at this time, the step changing is completed. After the completion of the step changing, the next pushing work is carried out, and the cycle is repeated until the departure of the TBM main machine 6 is completed.

[0033] Before stepping, the stepping oil cylinder 5 behind the shield 61 is connected with the shield 61 and the counterforce support 8 respectively, and the stepping oil cylinder 5 behind the outer key 62 is connected with the outer key 62 and the counterforce support 8 respectively. When stepping, the following steps are performed: (1) the counterforce support 8 close to the shield 61 behind the shield 61 is connected with the stepping rail 4 through the pin shaft 9, and the counterforce support 8 behind the outer key 62 is connected with the stepping rail 4 through the pin shaft 9; (2) the stepping oil cylinder 5 behind the shield 61 and the stepping oil cylinder 5 behind the outer key 62 are extended to push the TBM host 6 forward; (3) after one step is completed, the connection between the counterforce support 8 close to the shield 61 and the stepping rail 4 is removed, that is, the pin shaft 9 at the position is removed; (4) the stepping oil cylinder 5 behind the shield 61 is retracted; (5) the counterforce support 8 is reinstalled behind the shield 61 and connected with the stepping oil cylinder 5 and the stepping rail 4 at the position respectively, that is, the pin shaft 9 is used to continue the hinging connection between the stepping oil cylinder 5 and the stepping rail 4 at the position; (6) the connection between the counterforce support 8 behind the outer key 62 and the stepping rail 4 is removed, that is, the pin shaft 9 at the position is removed; (7) the stepping oil cylinder 5 behind the outer key 62 is retracted; (8) the counterforce support 8 is reinstalled behind the outer key 62 and connected with the stepping oil cylinder 5 and the stepping rail 4 at the position respectively, that is, the pin shaft 9 is used to continue the hinging connection between the stepping oil cylinder 5 and the stepping rail 4 at the position, and the step changing is completed; (9) the next stepping action is performed, that is, the stepping oil cylinder 5 behind the shield 61 and the stepping oil cylinder 5 behind the outer key 62 are extended again to push the TBM host 6 forward; and (10) the foregoing steps are repeated to complete the forward stepping of the TBM.

[0034] When stepping, the TBM host 6 enters the inclined straight section 11 at the bottom of the starting hole 1, which is selected as the maximum force condition of the stepping oil cylinder 5 for force analysis, so as to obtain the stepping thrust of the stepping oil cylinder 5 to meet the TBM stepping demand. At this time, the stepping oil cylinder 5 needs to provide the thrust to overcome the TBM host 6 sliding force, the TBM host 6 stepping friction and the TBM rear supporting pulling force. Among them: the host sliding force F=G sin θ°; the host friction f=μG cos θ° (select μ=1, because: the conventional stepping appears steel bite friction coefficient 0.6, the segmented place may exist misalignment, the contact area between the stepping sliding block and the stepping rail 4 in the arc section 3 may appear bite, and θ is the inclination angle of the inclined straight section 11).

[0035] The beneficial effects of the embodiment are as follows:

[0036] 1. The TBM host starting system of the embodiment connects the assembly hole 2 and the starting hole 1 through the arc section 3 and sets a plurality of stepping oil cylinders 5 to directly push the TBM host 6 to slowly move on the stepping rail 4, which discards the structure setting of the existing TBM host 6 starting system that needs to rotate the entire inclined shaft TBM host 6, reduces the construction difficulty, reduces the manpower and material resources and reduces the cost, and guarantees the safety and stability during construction.

[0037] 2. In this embodiment, the TBM main unit launching system can reduce the amount of excavation work for the assembly hole 2 by excavating the arc section 3 into a stepped shape, and also reduce the amount of concrete pouring required to fix the stepping track 4, thus reducing the construction difficulty of the stepping track 4.

[0038] 3. The TBM main engine launching system in this embodiment provides a feasible solution for launching the TBM main engine of the world's largest tonnage (1500 tons), largest diameter (7.2m), steepest inclination angle (39°), and ultra-long inclined shaft (928m) full-section water diversion inclined shaft. It can solve the problems caused by conventional drill and blast method construction of water diversion inclined shafts, such as difficulty in controlling the construction guidance and tunnel shape, poor flatness of the excavated tunnel, common over-excavation and under-excavation problems, slow construction speed, and poor safety.

[0039] Example 2

[0040] This embodiment provides a full-section TBM launching method suitable for steeply inclined, large-diameter water diversion wells, including the following steps (the order of the following steps can be flexibly adjusted according to actual needs):

[0041] Step 1: A launching tunnel 1 is constructed at the bottom of the water intake inclined shaft, and an assembly tunnel 2 is constructed in the lower horizontal tunnel of the water intake. The assembly tunnel 2 contains an arc-shaped section 3 for the transition from the horizontal section 21 at the bottom of the assembly tunnel 2 to the inclined straight section 11 at the bottom of the launching tunnel 1. The total length of the launching tunnel 1 is: La = L1 + δ1; where L1 is the distance from the leading edge of the cutterhead of the TBM main unit 6 to the rear edge of the support shoe when the TBM main unit 6 is in the rear position, and δ1 is a margin (considering the front-to-back error of the TBM to the launching point, generally taken as ≥50cm). The dimensions of the assembly tunnel 2 must meet the assembly requirements and facilitate the layout of the stepping track 4. The arc-shaped section 3 within the assembly tunnel 2 is excavated in a stepped shape to reduce the excavation work of the assembly tunnel 2, reduce the amount of concrete pouring for the stepping track 4, and lower the construction difficulty of the stepping track 4. The crane hoisting area within the assembly tunnel 2 needs to have sufficient foundation bearing capacity to ensure the safety of the TBM hoisting operation. Assembly tunnel 2 adopts the shape of a city gate, starting tunnel 1 adopts the shape of a horseshoe or a circle, and the excavation cross section of the water diversion inclined shaft adopts a circle.

[0042] Step 2: Construct the stepping track 4. The stepping track 4 consists of three types of guide rails: a flat guide rail 41 fixed to the horizontal section 21 at the bottom of the assembly hole 2, an arc guide rail 42 fixed to the arc section 3, and an inclined guide rail 43 fixed to the inclined straight section 11 at the bottom of the starting hole 1.

[0043] Step three: construct the concrete foundation 7 on the bottom horizontal section 21 of the assembly hole 2, the arc section 3, and the bottom inclined straight section 11 of the originating hole 1, and after the construction is completed, install the step track 4, which is sequentially fixed and laid on the bottom horizontal section 21 of the assembly hole 2, the arc section 3, and the bottom inclined straight section 11 of the originating hole 1 through the concrete foundation 7. The connection mode of the step track 4 and the concrete foundation 7 is as follows: a plurality of steel plates 71 and a plurality of anchor bars 72 welded with the steel plates 71 are pre-buried in the concrete foundation 7, and the step track 4 is welded with the steel plates 71; in order to meet the requirement of step thrust, the number of steel plates 71 pre-buried in the concrete foundation 7 corresponding to each type of guide rail should not be less than 2; if necessary, the step track 4 and the concrete foundation 7 are reinforced by anchor rods, and in specific implementation, the upper exposed part of the anchor rod can be welded with the step track 4 (arc guide rail 42 and inclined section guide rail 43), and the lower part of the anchor rod is inserted into the rock soil of the concrete foundation 7 and / or the cavern (i.e. the assembly hole 2, the arc section 3, and the originating hole 1), and the rock insertion depth and diameter of the anchor rod should meet the requirements of anti-pulling and anti-shearing. The flat section guide rail 41 can not be reinforced by anchor rods, but can be directly connected with the concrete foundation 7 by expansion bolts. The arc section 3 is a step arranged along the axis direction of the assembly hole 2 upstream, and the reinforced concrete foundation 7 is arranged on the step, and the width of the reinforced concrete foundation 7 should meet the requirements of track arrangement and local shearing capacity, and the height of the reinforced concrete foundation 7 gradually changes with the rising of the step.

[0044] Step four: all the tracks (flat section guide rail 41, arc guide rail 42, and inclined section guide rail 43) are butt welded to realize the overall stress of the tracks and the combined bearing of the step track 4 and the concrete foundation 7.

[0045] Step five: the step work is repeatedly performed by the four step oil cylinders 5 until the TBM main machine 6 is pushed into the originating hole 1, and the originating of the TBM main machine 6 is completed.

[0046] Step six: after the originating of the TBM main machine 6 is completed, the step device (i.e. the step oil cylinder 5, counterforce support 8, and the like) is removed, the TBM main machine 6 and the matching system thereof are debugged to ensure the normal state, the laser guide system is installed and adjusted, the TBM originating hole 1 is constructed, the TBM track is laid, and the transportation equipment is in place, so that the entire TBM can be started.

[0047] Step seven: approach the working face at a starting propulsion speed of 20% to 25%, after the TBM is started, in order to control the propulsion axis and protect the cutter head, the working face rock must be ground patiently, so that the working face rock is fully cut; in order to control the oil pressure and the speed of the cutter head, the propulsion speed should not be too fast at this time, and should be within 3mm / min. When excavating 3cm to 5cm, the speed is increased by 5% to 10%, and after each increase, it is slightly delayed for about 15s. If the shoe pressure does not decrease, the propulsion force is not higher than the upper limit, and the torque does not exceed the specified value, the propulsion speed can be increased until the desired propulsion speed is reached. After the TBM excavates a cycle, supporting construction is carried out according to the specification and design requirements.

[0048] The beneficial effects of the embodiment are:

[0049] 1. The embodiment provides a full-face TBM starting method suitable for steeply inclined, large-diameter water diversion inclined shaft, which connects the assembly hole 2 and the starting hole 1 through the arc-shaped section 3 and sets several step cylinders 5 to directly push the TBM main machine 6 to slowly move on the step rail 4, discarding the structure setting of rotating the entire inclined shaft TBM main machine 6 in the existing TBM starting system and method, reducing the construction difficulty, reducing manpower and material resources and reducing the cost, and ensuring the safety and stability during construction.

[0050] 2. The TBM starting method of the embodiment can reduce the excavation workload of the assembly hole 2 by excavating the arc-shaped section 3 into a stepped shape, also reducing the amount of concrete pouring of the step rail 4 that needs to be fixed with concrete, and reducing the construction difficulty of the step rail 4.

[0051] 3. The TBM starting method of the embodiment provides a feasible solution for the full-face water diversion inclined shaft TBM starting of the world's largest tonnage (1500 tons), largest diameter (7.2m), high steep inclination (39°), and super-long inclined shaft (928m), which can solve the problems of difficult control of construction guidance and hole shape, poor flatness of excavated hole, common overbreak and underbreak, slow construction speed, poor safety, etc. caused by conventional drilling and blasting method construction of water diversion inclined shaft.

[0052] The content illustrated in the above embodiments should be understood as these embodiments only for more clearly illustrating the utility model, and not for limiting the scope of the utility model, after reading the utility model, the modification of various equivalent forms of the embodiment by the person skilled in the art all fall within the scope defined by the claims of the utility model.

Claims

1. A full-face TBM main unit launching system for a diversion inclined shaft, comprising an assembly hole (2) arranged horizontally and a launching hole (1) which is obliquely communicated with the assembly hole (2), characterized in that, The assembly hole (2) and the originating hole (1) are connected by an arc segment (3) in transition, and a step track (4) is laid along the assembly hole (2), the arc segment (3) and the originating hole (1) in turn, a plurality of step oil cylinders (5) are arranged on the step track (4), and the plurality of step oil cylinders (5) are connected with a shield (61) and an outer key (62) of a TBM main machine (6) respectively.

2. The pilot incline shaft full-face TBM mainframe launching system according to claim 1, characterized in that, The step track (4) comprises a flat segment guide rail (41) fixed in the assembly hole (2), an arc guide rail (42) fixed on the arc segment (3) and an inclined segment guide rail (43) fixed in the originating hole (1), and the flat segment guide rail (41), the arc guide rail (42) and the inclined segment guide rail (43) are connected in turn.

3. The pilot incline shaft full-face TBM mainframe launching system according to claim 2, characterized in that, The arc segment (3) is in the shape of a step arranged along the axis direction of the assembly hole (2).

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