CN214787382U

CN214787382U - Open-type TBM propulsion system

Info

Publication number: CN214787382U
Application number: CN202120396129.4U
Authority: CN
Inventors: 王可; 张啸; 陈威明; 周志强; 尹威华
Original assignee: China Railway Engineering Equipment Group Co Ltd CREG
Current assignee: China Railway Engineering Equipment Group Co Ltd CREG
Priority date: 2021-02-23
Filing date: 2021-02-23
Publication date: 2021-11-19
Anticipated expiration: 2031-02-23

Abstract

The utility model discloses an open-type TBM advancing system has solved among the prior art problem that TBM advancing system advancing efficiency is low under the soft rock operating mode. The utility model comprises a main propulsion mechanism arranged on the main beam and an auxiliary propulsion mechanism arranged at the bottom of the shield, wherein the auxiliary propulsion mechanism is positioned in front of the main propulsion mechanism; the shield comprises a top shield and a bottom shield, and the auxiliary propulsion mechanism is connected to the bottom shield. The utility model discloses shield increases supplementary propulsion system mechanism at bottom of traditional open-type TBM, when meeting weak broken country rock, through the use of assisting the hydro-cylinder that pushes away, reduces main propulsion cylinder's propulsive force, and then reduces and props the effort that the tight country rock was propped to the boots (reduce the ground connection specific pressure that props the boots promptly), avoids propping the unable tight cliff that props of boots, and the shut down that causes consolidates the country rock. The adaptability and the tunneling efficiency of the open TBM are further improved.

Description

Open-type TBM propulsion system

Technical Field

The utility model relates to an open-type TBM technical field especially indicates an open-type TBM advancing system.

Background

The TBM hard rock tunnel boring machine is a special engineering machine for tunnel boring, has the functions of excavating and cutting soil bodies, conveying mud residues, assembling tunnel linings and the like, and is widely used for tunnel engineering of subways, railways, highways, municipal works, hydropower and the like.

In the open type TBM propulsion system, surrounding rock is tightly supported by the supporting shoes, a propulsion oil cylinder connected with the supporting shoes and the main beam provides forward power for the cutter head and the main drive, and the static friction force between the supporting shoes and the wall of the hole is greater than the propulsion force of the propulsion oil cylinder, so that forward tunneling of the main machine is realized. However, when the open type TBM encounters weak and broken surrounding rocks in the tunneling process, the supporting shoes cannot support the surrounding rocks tightly, the static friction force between the supporting shoes and the wall of the tunnel is smaller than the propelling force of the propelling oil cylinder, and the propelling force cannot be provided for the tunneling of the TBM at the moment. The traditional treatment method is to stop the machine for manual slurry spraying or tunneling after mold building, so that continuous tunneling cannot be realized, and the tunneling efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

To not enough among the above-mentioned background art, the utility model provides an open-type TBM advancing system has solved among the prior art problem that TBM advancing system advancing efficiency is low under the soft rock operating mode.

The technical scheme of the utility model is realized like this: an open TBM propulsion system comprises a main propulsion mechanism arranged on a main beam and an auxiliary propulsion mechanism arranged at the bottom of a shield, wherein the auxiliary propulsion mechanism is positioned in front of the main propulsion mechanism; the shield comprises a top shield and a bottom shield, and the auxiliary propulsion mechanism is connected to the bottom shield.

Furthermore, the auxiliary pushing mechanism comprises auxiliary pushing oil cylinders which are symmetrically arranged on the rear end face of the bottom shield, and telescopic ends of the auxiliary pushing oil cylinders are hinged with pushing shoe plates. Preferably, said thrust shoe corresponds to an inverted arch laying on the wall of a soft rock cavern.

Furthermore, the main propulsion mechanism comprises a main propulsion oil cylinder and a supporting shoe, the supporting shoe is arranged on the main beam in a sliding mode, one end of the main propulsion oil cylinder is hinged to the main beam, and the other end of the main propulsion oil cylinder is connected with the supporting shoe. Preferably, the main push oil cylinders are arranged in parallel along the axial direction of the main beam and symmetrically arranged on two sides of the main beam.

Furthermore, a girder is fixed at the tail end of the girder, a rear support is arranged on the girder, and a support boot plate is arranged on the rear support. Preferably, the rear support is vertically and fixedly connected with the girder and can extend and retract relative to the girder.

The utility model discloses shield increases supplementary propulsion system mechanism at bottom of traditional open-type TBM, when meeting weak broken country rock, through the use of assisting the hydro-cylinder that pushes away, reduces main propulsion cylinder's propulsive force, and then reduces and props the effort that the tight country rock was propped to the boots (reduce the ground connection specific pressure that props the boots promptly), avoids propping the unable tight cliff that props of boots, and the shut down that causes consolidates the country rock. The adaptability and the tunneling efficiency of the open TBM are further improved. The utility model discloses main propulsion mechanism and the parallel parallelly connected setting of supplementary propulsion mechanism, both cooperate the cooperation flexible, provide the power that TBM tunnelled forward, ensure that TBM is high-efficient, tunnel in succession, improve efficiency of construction and construction factor of safety.

Drawings

In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive work.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a view from a-a in fig. 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

As shown in fig. 1, in embodiment 1, an open type TBM propulsion system includes a main propulsion mechanism disposed on a main beam 8 and an auxiliary propulsion mechanism disposed at the bottom of a shield, the auxiliary propulsion mechanism is located in front of the main propulsion mechanism, the main propulsion mechanism and the auxiliary propulsion mechanism are disposed in parallel, and cooperate with each other to extend and retract, so as to provide power for forward driving of the TBM. The shield comprises a top shield 2 and a bottom shield 4, an auxiliary propulsion mechanism is connected to the bottom shield 4, the bottom shield 4 is in rigid connection with a main drive 3 through bolts, a main beam is in rigid connection with the main drive through bolts, and the main drive 3 is connected with a cutter head 1 to provide power for rotating the cutter head.

Further, as shown in fig. 2, the auxiliary pushing mechanism includes auxiliary pushing cylinders 5, the auxiliary pushing cylinders 5 are symmetrically disposed on the rear end surface of the bottom shield 4 and axially disposed, and the telescopic ends of the auxiliary pushing cylinders 5 are hinged with pushing shoe plates 6. The push shoe plate 6 corresponds to an arch-raising block 7 laid on the soft rock tunnel wall. When the surrounding rock is weak and broken, the inverted arch blocks are paved at the bottom of the TBM tunnel and are sequentially axially connected to serve as a material transportation channel at the later stage of the tunnel. The supporting shoe supports the wall of the hole, and the auxiliary pushing oil cylinder 5 tightly supports the overhead arch block; the main propulsion cylinder and the auxiliary propulsion cylinder extend out together, so that the main machine tunnels forwards.

Embodiment 2, an open-type TBM propulsion system, the main propulsion mechanism includes a main thrust cylinder 9 and a supporting shoe 10, the supporting shoe 10 is slidably disposed on a main beam 8, one end of the main thrust cylinder 9 is hinged to the main beam 8, and the other end is connected to the supporting shoe 10. When surrounding rock is good, the supporting shoes support the tunnel wall tightly, and the main machine is driven forwards through the main pushing oil cylinder.

Further, the main push oil cylinders 9 are arranged in parallel along the axial direction of the main beam 8 and symmetrically arranged on two sides of the main beam 8, and the number of the main push oil cylinders is selected according to the construction working condition so as to provide stable jacking force. And a girder 11 is fixed at the tail end of the girder 8 and is rigidly connected with the girder through bolts. The girder 11 is provided with a rear support 12, and the bottom end of the rear support 12 is provided with a support shoe plate 13. The rear support 12 is vertically and fixedly connected with the girder 11 and can extend and retract relative to the girder 11. The other structure is the same as embodiment 1.

The working process is as follows: when the surrounding rock is good:

1. recovering the auxiliary push oil cylinder 5; 2. the supporting shoes 10 tightly support the surrounding rock at high pressure, the rear support 12 is lifted, and forward thrust is provided by the main thrust oil cylinder 9; 3. after a tunneling cycle is completed, the rear support 12 is put down, the supporting shoe 10 is retracted, the main push cylinder 9 is retracted, and the inverted arch block is installed; 4. and (4) repeating the step 2 to the step 3, and carrying out continuous tunneling.

When the surrounding rock is weak and broken:

1. the tunnel is used for laying an inverted arch block 7 as an acting fulcrum of the auxiliary push oil cylinder 5; 2. the auxiliary push oil cylinder 5 is extended out to tightly support the overhead arch block 7; 3. the supporting shoe 10 tightly supports the surrounding rock at low pressure and raises the rear support 12; 4. the auxiliary push oil cylinder 5 and the main push oil cylinder 9 extend out simultaneously, wherein the auxiliary push oil cylinder 5 extends out at high pressure, and the main push oil cylinder 9 extends out at low pressure to push the TBM to tunnel forwards; 5. after a tunneling cycle is completed, the rear support 12 is put down, the supporting shoe 10 is retracted, the auxiliary push oil cylinder 5 and the main push oil cylinder 9 are retracted, and the inverted arch block is installed; 6. and (5) repeating the step 2 to the step 5, and carrying out continuous tunneling.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An open TBM propulsion system characterized by: comprises a main propelling mechanism arranged on a main beam (8) and an auxiliary propelling mechanism arranged at the bottom of a shield, wherein the auxiliary propelling mechanism is positioned in front of the main propelling mechanism; the shield comprises a top shield (2) and a bottom shield (4), and the auxiliary propulsion mechanism is connected to the bottom shield (4).

2. The open TBM propulsion system of claim 1, wherein: the auxiliary propelling mechanism comprises auxiliary propelling oil cylinders (5), the auxiliary propelling oil cylinders (5) are symmetrically arranged on the rear end face of the bottom shield (4), and the telescopic ends of the auxiliary propelling oil cylinders (5) are hinged with propelling shoe plates (6).

3. The open TBM propulsion system of claim 2, wherein: the propelling shoe plate (6) corresponds to an inverted arch block (7) paved on the soft rock tunnel wall.

4. The open TBM propulsion system of claim 1, 2 or 3, characterized in that: the main propelling mechanism comprises a main propelling oil cylinder (9) and a supporting shoe (10), the supporting shoe (10) is arranged on the main beam (8) in a sliding mode, one end of the main propelling oil cylinder (9) is hinged to the main beam (8), and the other end of the main propelling oil cylinder is connected with the supporting shoe (10).

5. The open TBM propulsion system of claim 4, wherein: the main push oil cylinders (9) are arranged in parallel along the axial direction of the main beam (8) and symmetrically arranged on two sides of the main beam (8).

6. The open TBM propulsion system of claim 4, wherein: the tail end of the main beam (8) is fixed with a girder (11), a rear support (12) is arranged on the girder (11), and a support boot plate (13) is arranged on the rear support (12).

7. The open TBM propulsion system of claim 6, wherein: the rear support (12) is vertically and fixedly connected with the girder (11) and can stretch and retract relative to the girder (11).