CN212479238U - Shield machine - Google Patents

Abstract

The utility model provides a shield constructs machine. The shield machine comprises a shield body, wherein a slurry inlet pipe, a spiral conveyor and a belt conveyor are arranged in the shield body, the slurry inlet pipe is communicated with an expansive soil system, the spiral conveyor is connected with a dilution box, and the dilution box is connected with a slurry discharge pipe. The utility model has the advantages that: the soil pressure mud-water mode conversion can be realized, under the mud-water mode, when soft and hard stratum alternate or stratum has karst cave and crack, high-concentration slurry is injected into the soil bin, so that the slurry permeability is reduced, and when the karst cave and the crack are filled, a mud film is formed on the working surface more easily, and the stability of the working surface is improved.

Description

Shield machine

Technical Field

The utility model relates to a tunnel construction equipment especially indicates a shield constructs machine.

Background

With the increasing number of tunnels in China and the increasing complexity of geological conditions, the multi-mode shield tunneling machine is required to meet different geological construction conditions. Therefore, higher requirements are provided for the performance indexes of the shield tunneling machine so as to meet extremely severe complicated and changeable geological and hydrological conditions.

When complex stratum environment is tunneled, due to the existence of karst caves and cracks and when soft and hard stratums are changed alternately, a single-mode shield machine is used, the stability of a tunneling tunnel face is difficult to keep, and construction risks such as ground surface settlement and even ground collapse are easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides a shield constructs machine has solved to distribute in the stratum has crack and solution cavity, and current shield constructs the problem that the machine can not easily deal with adverse circumstances.

The utility model discloses can realize the soil pressure mode, ordinary muddy water mode, three kinds of modes of thick mud shield mode, choose different modes to tunnel according to the stratum difference, and thick mud shield mode advances to arrange thick liquid proportion according to stratum condition adjustment excavation storehouse, can switch to ordinary muddy water shield, also can switch to thick mud shield, it is variable according to the stratum needs, can play effectual mechanical support to the face, can realize pressure transmission's equilibrium again, face pressure control is accurate, the earth's surface subsides control well, the specially adapted weak stratum, subside control harsh stratum, many cracks in south China area, many solution cavity stratum, be the indispensable shield type of tunnel construction from now on.

The technical scheme of the utility model is realized like this: a shield machine comprises a shield body, wherein a slurry inlet pipe and a spiral conveyor which stretch into an excavation bin are arranged in the shield body, the slurry inlet pipe is communicated with an expansive soil system, the spiral conveyor is connected with a dilution box, and the dilution box is connected with a slurry discharge pipe.

And a density monitoring system is arranged in the excavation bin.

The density monitoring system comprises a density pump.

The front end of the shield body is provided with an excavation bin and an air cushion bin.

And a cutter head is arranged in the excavation bin.

And a detachable crusher or a transition box is connected between the screw conveyor and the dilution box.

The slurry inlet pipe is connected with the dilution tank through a flushing pipeline I.

The slurry inlet pipe is connected with the cutter head scouring pipeline through a scouring pipeline II.

The screw conveyer is detachably connected with the dilution box or the belt conveyor.

The utility model discloses a function or purpose of realization:

the utility model discloses a shield constructs machine has multiple application mode, selects different modes according to the stratum difference to advance the proportion of thick liquid through adjusting under the muddy water mode, make the face can remain stable state throughout at complicated changeable stratum.

The utility model has the advantages that:

the shield constructs the machine and when tunnelling, can realize soil pressure muddy water mode conversion, and under the muddy water mode, when soft or hard stratum is alternative or the stratum has karst cave and crack, pours into high concentration thick liquid into the soil storehouse through bentonite system for thick liquid permeability diminishes, when filling karst cave, crack, forms the mud film at the working face more easily, effectively improves the stability of palm face.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is the soil pressure mode tunneling diagram of the present invention.

Fig. 2 is the mud-water mode tunneling diagram of the present invention.

In the figure: 1-shield body, 2-cutter head, 3-excavation bin, 4-air cushion bin, 5-screw conveyer, 6-crusher, 7-dilution box, 8-slurry inlet pipe, 9-scouring pipeline I, 10-slurry discharge pipe, 11-scouring pipeline II and 12-belt conveyer.

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 and 2, the shield machine comprises a shield body 1, a cutter head 2, an excavation bin 3, an air cushion bin 4, a screw conveyor 5, a crusher 6, a dilution box 7, a slurry inlet pipe 8, a scouring pipeline I9, a slurry discharge pipe 10, a scouring pipeline II 11 and a belt conveyor 12.

The shield body 1 is a shell for bearing water and soil pressure, an excavation bin 3 and an air cushion bin 4 are arranged at the front end of the shield body, a cutter head 2 for tunneling is arranged in the excavation bin 3, and excavation cutting is carried out through the main driving rotating cutter head.

A slurry inlet pipe 8 and a screw conveyer 5 which extend into the excavation bin 3 are arranged in the shield body 1. The slurry inlet pipe is used for injecting slurry into the excavation bin and the air cushion bin, the slurry inlet pipe 8 is communicated with the expansive soil system, and the expansive soil system can provide thick slurry for the excavation bin. The screw conveyer sends the dregs or slurry out of the excavation bin.

In the muddy water mode, the screw conveyor 5 is detachably connected with the dilution tank 7, the dilution tank 7 is detachably connected with the slurry discharge pipe 10, and slurry of the screw conveyor is discharged out of the tunnel through dilution. If large stones exist in the stratum, the detachable crusher 6 is connected between the screw conveyor 5 and the dilution box 7, and if the large stones do not exist in the stratum, the transition box is connected. Under the soil pressure mode, the screw conveyor 5 is detachably connected with the belt conveyor 12, and the residue soil of the screw conveyor is sent out of the tunnel through the belt conveyor.

A density monitoring system, preferably a density pump, is arranged in the excavation bin 3, the specific gravity of the slurry is monitored in real time, the specific gravity of the slurry can be adjusted according to the stratum condition, and the stability of the tunnel face and the tunneling efficiency are effectively guaranteed.

The slurry inlet pipe 8 is connected to the dilution tank 7 via a flushing line I9 for feeding dilution slurry to the dilution tank. The slurry inlet pipe 8 is connected with a cutter disc scouring pipeline through a scouring pipeline II 11 and is used for scouring mud cakes on the cutter disc.

A construction method of the shield tunneling machine.

And in the soil pressure mode, the spiral conveyor is connected with the front section of the belt conveyor in an installing mode, the cutter head excavates the slag soil and then the slag soil is discharged out of the tunnel through the spiral conveyor and the belt conveyor.

Under the ordinary muddy water mode, with screw conveyer and dilution box erection joint, according to having or not having big stone in the stratum, install breaker or transition case additional between screw conveyer and the dilution box, advance thin mud to excavation storehouse through advancing the thick liquid, arrange thick liquid through screw conveyer, dilution box and mud discharge pipe.

In the thick mud shield mode, the screw conveyer is installed and connected with the dilution box, a crusher or a transition box is additionally arranged between the screw conveyer and the dilution box according to the existence of large stones in the stratum, the expansive soil system feeds thick mud into the excavation bin through a mud feeding pipe, and the mud is discharged through the screw conveyer, the dilution box and a mud discharging pipe. The thick slurry makes the slurry permeability small, and when filling karst cave and crack, a mud film is more easily formed on the working surface, and the stability of the palm surface is effectively improved.

And a density monitoring system is arranged in the excavation bin 3, and the specific gravity of the slurry in the excavation bin is detected in real time through the density monitoring system.

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 (9)

1. The utility model provides a shield constructs machine, includes shield body (1), is equipped with into advance thick liquid pipe (8) and screw conveyer (5) of excavation storehouse (3) in shield body (1), its characterized in that: the slurry inlet pipe (8) is communicated with the expansive soil system, the screw conveyor (5) is connected with the dilution box (7), and the dilution box (7) is connected with the slurry discharge pipe (10).

2. The shield machine of claim 1, wherein: and a density monitoring system is arranged in the excavation bin (3).

3. The shield machine of claim 2, wherein: the density monitoring system comprises a density pump.

4. The shield machine of claim 1, wherein: the front end of the shield body is provided with an excavation bin and an air cushion bin.

5. The shield machine of claim 1 or 4, characterized in that: and a cutter head is arranged in the excavation bin.

6. The shield machine of claim 1, wherein: a detachable crusher (6) or a transition box is connected between the screw conveyor (5) and the dilution box (7).

7. The shield machine of claim 1, wherein: the slurry inlet pipe (8) is connected with the dilution tank (7) through a flushing pipeline I (9).

8. The shield machine of claim 1 or 7, characterized in that: the pulp inlet pipe (8) is connected with a cutter head flushing pipeline through a flushing pipeline II (11).

9. The shield machine of claim 1, wherein: the screw conveyor (5) is detachably connected with the dilution box (7) or the belt conveyor (12).

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