CN211974972U

CN211974972U - Density-adjustable muddy water and soil pressure dual-mode shield tunneling machine

Info

Publication number: CN211974972U
Application number: CN201922190319.6U
Authority: CN
Inventors: 张�林; 于泽阳; 张阳; 梅万永; 高雷; 郭楠; 贺民璐; 严子彪; 朱鸿浦
Original assignee: Tianhe Mechanical Equipment Manufacturing Co Ltd
Current assignee: Tianhe Mechanical Equipment Manufacturing Co Ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-11-20
Anticipated expiration: 2029-12-09

Abstract

The utility model discloses a dual mode shield structure machine of muddy water soil pressure of adjustable density, all be connected with the muddy water storehouse including input and output and be used for measuring the density of mud in the muddy water storehouse when it opens the survey density pipeline, the output is connected to the muddy water storehouse and is used for injecting into the mud injection pipeline that adds of high density mud in the muddy water storehouse, the shield structure machine has muddy water operating condition, the soil pressure operating condition, adjustable density operating condition, when it is in adjustable density operating condition, the muddy water storehouse is linked together with the air cushion storehouse, advance the thick liquid pipeline and mend the thick liquid pipeline and open, conveyor breaks away from and the export of screw machine plugs into the mud case, survey the density pipeline and open. The utility model discloses carry out muddy water and soil pressure mode switch to different stratum geology, especially contain extremely special geology such as solution cavity, soil cave and can't form effective mud film and carry out pressure control's condition under to density pressure gradient control replaces traditional pressure control, realizes the high-efficient tunnelling under the complicated geology.

Description

Density-adjustable muddy water and soil pressure dual-mode shield tunneling machine

Technical Field

The utility model relates to a double mode shield structure machine of muddy water soil pressure of adjustable density is suitable for the interval of special geology such as the more complicated rock stratum of geology containing solution cavity, soil cave to be used, belongs to the shield structure field of being under construction.

Background

The shield machine becomes one of the core components of the shield method construction of the current underground tunnel construction, the mainstream of the shield machine is an earth pressure balance shield machine and a muddy water balance shield machine, the current construction is mostly a single-mode shield machine adopting an earth pressure mode or a muddy water mode according to parameters such as stratum water content, and the like, and the shield machine can not carry out mode conversion.

The shield tunneling machines in the two single modes tunnel an interval with large geological condition change, the condition of difficult tunneling can occur in a geological complex section, the construction period and the cost are greatly increased, and even dangers such as collapse can occur, so that potential safety hazards are brought to tunnel construction and safety construction.

To above problem, the single mode shield has been progressively hard to the research and development direction of the double mode shield of soil pressure muddy water, has appeared the case of the shield machine of soil pressure muddy water combination form gradually in the trade at present, like application number 2019106754166's utility model patent discloses a double mode shield machine is pressed to muddy water soil, nevertheless this type of double mode shield machine can't solve if meet special geology such as solution cavity soil cave, and the mud in blade disc the place ahead mud membrane is destroyed the back, and mud escapes, can't carry out pressure control and carry out the problem of pressurize.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model aims to provide a double mode shield structure machine is pressed to muddy water soil of adjustable density.

In order to achieve the above purpose, the utility model discloses a technical scheme is: a density-adjustable slurry-soil pressure dual-mode shield machine comprises a shield body, an air cushion bin arranged in front of the shield body, a slurry bin arranged in front of the air cushion bin, a cutter head arranged in front of the slurry bin, a slurry inlet pipeline with an output end connected to the slurry bin, a slurry supplementing pipeline with an input end connected with the slurry inlet pipeline and an output end connected with the air cushion bin, a screw machine with an inlet connected to the bottom of the slurry bin, a slurry tank detachably connected with an outlet of the screw machine, a slurry discharging pipeline with an input end connected with the slurry tank, and a conveying device detachably connected with an outlet of the screw machine and used for conveying residue soil, wherein the slurry bin is communicated with the air cushion bin in a blocking manner, and the shield machine has a slurry working state and a soil pressure working state,

the shield tunneling machine further comprises a density measuring pipeline and a mud filling injection pipeline, wherein the input end and the output end of the density measuring pipeline are connected with the mud water bin and used for measuring the density of mud in the mud water bin when the density measuring pipeline and the output end of the mud filling injection pipeline are connected with the mud water bin and used for injecting high-density mud into the mud water bin, the shield tunneling machine further has a density-adjustable working state, when the shield tunneling machine is in the density-adjustable working state, the mud water bin is communicated with the air cushion bin, the mud feeding pipeline and the mud supplementing pipeline are opened, the conveying device is separated from the outlet of the screw machine, the outlet of the screw machine is connected with the mud.

Further, when the shield machine is in a muddy water working state, the slurry inlet pipeline and the slurry supplementing pipeline are opened, the conveying device is separated from the outlet of the screw machine, the outlet of the screw machine is connected with the slurry tank, when the shield machine is in a soil pressure working state, the slurry tank and the air cushion tank are blocked, the slurry inlet pipeline and the slurry supplementing pipeline are closed, the slurry tank is separated from the outlet of the screw machine, and the outlet of the screw machine is connected with the conveying device; and when the shield tunneling machine is in a muddy water working state and a soil pressure working state, the density measuring pipeline is closed.

Further, the density of the high density slurry is greater than the density of the slurry in the slurry inlet pipe.

Further, the density measuring pipeline comprises a pipeline, a density measuring circulating pump capable of enabling the slurry in the slurry cabin to circulate through the pipeline, and a densimeter for measuring the density of the slurry in the pipeline.

Further, the shield machine also comprises a bypass pipeline which can output the mud in the mud bin when the screw machine does not work, the input end of the bypass pipeline is connected with the mud bin, and the output end of the bypass pipeline is connected to the mud discharge pipeline.

Furthermore, the shield machine also comprises a flushing pipeline, wherein the input end of the flushing pipeline is connected with the slurry inlet pipeline, and the output end of the flushing pipeline is connected to the central part of the cutter head and the screw machine.

Furthermore, the shield tunneling machine also comprises an anti-stagnation discharge pipeline with an input end connected with the lower part of the muddy water bin and the lower part of the air cushion bin and an output end connected to the mud box, and a dilution pipeline with an input end connected with the mud inlet pipeline and an output end connected to the mud box.

Further, a crusher capable of crushing large solid matters is arranged at the outlet of the screw machine.

Furthermore, a communicating pipe is connected between the muddy water bin and the air cushion bin, and a valve capable of being opened and closed is arranged on the communicating pipe.

Further, the shield machine also comprises an air pressure maintaining pipeline of which the output end is connected to the upper part of the air cushion bin so as to convey air into the air cushion bin to keep the pressure of the air cushion bin balanced.

Through the technical scheme, the utility model discloses density-adjustable's double mode shield structure machine of muddy water soil pressure, on original soil pressure balance system and muddy water balance system's basis, combine effectively, to different stratum geology, carry out muddy water and soil pressure mode switch, especially contain the solution cavity, extremely special geology such as soil cave can't form effective mud film and carry out pressure control under the condition, the standard range that provides is compared with ground through the measured value of surveying the density pipeline, carry out density regulation and control, replace traditional pressure control with density pressure gradient control, realize the high-efficient tunnelling under the complicated geology.

Drawings

Fig. 1 is a schematic view of a connection structure of a density-adjustable slurry-soil pressure dual-mode shield tunneling machine in a slurry-soil working state and a density-adjustable working state according to an embodiment of the present invention;

fig. 2 is a schematic connection structure diagram of the density-adjustable muddy water-soil pressure dual-mode shield tunneling machine shown in fig. 1 in a soil pressure working state.

The reference numbers in the figures are:

1. a shield body; 2. an air cushion bin; 3. a muddy water bin; 4. a screw machine; 5. a conveying device; 6. a mud tank; 7. a slurry discharge pipeline; 8. a slurry inlet pipeline; 9. a slurry supplementing pipeline; 91. a slurry replenishing circulating pump; 10. measuring a density pipeline; 101. measuring a density circulating pump; 11. flushing the pipeline; 111. a washing circulating pump; 12. preventing the pipeline from being blocked; 121. the stagnation-proof discharge circulating pump; 13. a mud injection pipeline; 14. an air pressure maintaining pipeline; 15. a crusher; 16. a bypass line; 17. a communicating pipe; 18. a dilution pipeline.

Detailed Description

The following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings, enables those skilled in the art to more readily understand the advantages and features of the invention.

Referring to fig. 1 to 2, the density-adjustable slurry-soil pressure dual-mode shield tunneling machine in the embodiment includes a shield body 1, an air cushion chamber 2 disposed in front of the shield body 1, a slurry chamber 3 disposed in front of the air cushion chamber 2, a cutter (not shown in the drawings) disposed in front of the slurry chamber 3, a slurry inlet pipeline 8 having an output end connected to the slurry chamber 3, a slurry replenishing pipeline 9 having an input end connected to the slurry inlet pipeline 8 and an output end connected to the air cushion chamber 2, a screw machine 4 having an inlet connected to the bottom of the slurry chamber 3, a slurry tank 6 detachably connected to an outlet of the screw machine 4, a slurry discharge pipeline 7 having an input end connected to the slurry tank 6, and a conveyor 5 detachably connected to an outlet of the screw machine 4 and used for conveying dregs.

The muddy water bin 3 is communicated with the air cushion bin 2 in a blocking mode, specifically, a communicating pipe 17 is connected between the muddy water bin 3 and the air cushion bin 2, a valve capable of being opened and closed is arranged on the communicating pipe 17, and the muddy water bin 3 is communicated with the air cushion bin 2 in a blocking mode through opening and closing of the valve. More specifically, the communicating pipe is connected to the upper portion of the muddy water sump 3 and the upper portion of the air-cushion sump 2.

The shield machine also comprises a density measuring pipeline 10, wherein the input end and the output end of the density measuring pipeline are both connected with the muddy water bin 3 and used for measuring the density of mud in the muddy water bin 3. Specifically, the densitometer line 10 includes a pipe (not shown in the drawings), a densitometer pump 101 that circulates the slurry in the mud pit 3 through the pipe, and a densitometer (not shown in the drawings) that measures the density of the slurry in the pipe.

The shield machine also comprises a mud adding injection pipeline 13 of which the output end is connected to the mud sump 3, and when the shield machine is in the working state with adjustable density, high-density mud which is prepared in advance is injected into the mud sump 3 through the mud adding injection pipeline 13, and the density of the high-density mud is greater than that of the mud in the mud inlet pipeline 8. When the shield machine is in a muddy water working state, bentonite is also injected into the front part of the cutter head through a mud injection pipeline 13 to form an effective mud film.

The shield machine has a muddy water working state, a soil pressure working state and an adjustable density working state based on the muddy water working state. When the shield machine is in a muddy water working state, the slurry inlet pipeline 8 and the slurry supplementing pipeline 9 are opened, the conveying device 5 is separated from the outlet of the screw machine 4, and the outlet of the screw machine 4 is connected with the slurry tank 6. When the shield machine is in the earth pressure working state, the mud water bin 3 and the air cushion bin 2 are blocked, the mud inlet pipeline 8 and the mud supplementing pipeline 9 are closed, the mud box 6 is separated from the outlet of the screw machine, and the outlet of the screw machine 4 is connected with the conveying device 5.

The adjustable density working state is a working state of the shield tunneling machine based on muddy water working state, and is suitable for complex bottom layers containing karst caves and the like. When the shield machine is in the density-adjustable working state, on the basis of a connecting structure for keeping the muddy water working state (namely, the muddy water bin 3 is communicated with the air cushion bin 2, the slurry inlet pipeline 8 and the slurry supplementing pipeline 9 are opened, the conveying device 5 is separated from the outlet of the screw machine 4, and the outlet of the screw machine 4 is connected with the slurry tank 6), the slurry inlet pipeline 8 is opened, the density measuring pipeline 10 is opened and measures the slurry density in the muddy water bin 3, the measured value is compared with a standard range, and the input quantity of the slurry adding injection pipeline 13 and the slurry supplementing pipeline 9 and the output quantity of the screw machine 4 are adjusted according to the comparison result, so that the slurry density in the muddy water bin 3 is kept in the standard range. When the shield machine is in a muddy water working state and a soil pressure working state, the density measuring pipeline 10 is closed because the density does not need to be monitored.

The slurry supplementing pipeline 9 comprises a slurry supplementing circulating pump 91, and when the slurry supplementing pipeline 9 is opened, slurry in the slurry inlet pipeline 8 is pumped into the air cushion cabin 2 to supplement slurry under the action of the slurry supplementing circulating pump 91. Under the working state of adjustable density, when the pressure in the muddy water bin 3 is lower than that in the air cushion bin 2, the slurry in the air cushion bin 2 can enter the muddy water bin 2, the liquid level in the air cushion bin 2 descends, and the slurry is supplemented to the air cushion bin 2 to keep the liquid level in the air cushion bin 2 stable. While the face pressure may be fine tuned in conjunction with an air dwell system as will be described below.

In a more preferred embodiment, the shield tunneling machine further comprises an air pressure maintaining line 14, the output end of which is connected to the upper portion of the air cushion chamber 2 to deliver air into the air cushion chamber 2 to keep the air cushion chamber 2 in pressure equilibrium.

In a more preferred embodiment, the shield machine further comprises a flushing line 11 having an input end connected to the slurry inlet line 8 and an output end connected to a central portion of the cutterhead and the screw machine. The flushing pipeline 11 comprises a flushing circulating pump 111, and under the action of the flushing circulating pump 111, slurry in the slurry inlet pipeline 8 is conveyed to the center of the cutter head and the position of the screw machine so as to perform high-pressure flushing on the center of the cutter head and the screw machine.

In a more preferred embodiment, the shield tunneling machine further comprises an anti-stagnation discharge pipeline 12, the input end of the anti-stagnation discharge pipeline 12 is connected with the lower portions of the slurry bin 3 and the air cushion bin 2, the output end of the anti-stagnation discharge pipeline 12 is connected to the slurry tank 6, and the anti-stagnation discharge pipeline 12 comprises an anti-stagnation discharge circulating pump 121. When the muddy water is in the working state and the density-adjustable working state, the sludge slurry accumulated in the air cushion bin 2 and the muddy water bin 3 is conveyed to the sludge box 6 under the action of the stagnation-proof circulating pump 121, so that the problem of high-density slurry deposition at the bottoms of the air cushion bin 2 and the muddy water bin 3 is solved. The slurry inlet pipeline 8 is provided with a dilution pipeline 18 communicated to the slurry tank 6, the input end of the dilution pipeline 18 is connected with the slurry inlet pipeline 8, the output end of the dilution pipeline is connected to the slurry tank 6, the diluted slurry inlet slurry is conveyed to the slurry tank 6, the slurry tank 6 is washed and diluted, and the high-density slurry is discharged from the slurry discharge pipeline 7 after being sufficiently washed and diluted in the slurry tank 6. When the shield machine is switched to earth pressure operation, the dilution line 18 is closed or removed with the mud tank 6.

In a more preferred embodiment, the outlet of the screw machine 4 is provided with a crusher 15, which is capable of crushing large solid matter. The crusher 15 is applied in a muddy water working condition, and preferably, the crusher 15 is removed in an earth pressure working condition.

In a more preferable embodiment, the shield machine further comprises a bypass pipeline 16, an input end of the bypass pipeline 16 is connected with the mud water bin 3, an output end of the bypass pipeline is connected to the slurry discharge pipeline 7, the bypass pipeline 16 can output the slurry in the mud water bin 3 when the screw machine 4 does not work, and the method is mainly used for performing slurry replacement on the mud water bin 3 when the shield machine is switched from a mud water working state to an earth pressure working state.

The working principle is as follows:

when the shield tunneling machine is switched from the earth pressure working state to the muddy water working state for tunneling, firstly, the tunneling is stopped, the cutter head slowly rotates, bentonite is injected into the front part of the cutter head through the mud injection pipeline 13, an effective mud film is formed in the front part of the cutter head, mud is added into the muddy water bin 3 through the mud inlet pipeline 8, meanwhile, under the action of the mud supplementing circulating pump 91, the mud supplementing pipeline 9 is used for supplementing mud into the air cushion bin 2 to a half bin position, in the process, the screw machine 4 keeps a slag discharging state, the slag at the bottom of the muddy water bin 3 is discharged, when the pressure and the slag discharging state obviously change in the screw machine 4, namely the slag in the screw machine 4 obviously changes from the slag into the mud, the gate of the screw machine 4 is closed, the conveying device 5 is removed, the mud tank 14, the crusher 15 and the mud discharging pipeline 7 are installed, the gate of the screw machine 4 is opened after the installation, the mud discharging pipeline 7 is started, the communicating pipe 17, and (3) opening the air pressure maintaining pipeline 7, crushing the slurry mixed sandstone output by the screw machine 4 by the crusher 15, diluting the crushed sandstone in the slurry tank 14, and conveying the diluted sandstone out of the tunnel by the slurry discharge pipeline 7.

When the shield machine is switched from the muddy water working state to the soil pressure working state for tunneling, firstly, slurry feeding of the slurry feeding pipeline 8 is stopped, meanwhile, the rotation of the screw machine 4 is stopped, a gate of the screw machine 4, the air pressure maintaining system 14 and the communicating pipe 17 are closed, the bypass valve group 16 is opened, the shield machine still keeps slowly tunneling, and slurry in the muddy water bin 3 is accumulated along with the residue and the soil and is conveyed out of the tunnel to the slurry discharge pipeline 7 through the bypass pipeline 16. After the mud in the mud water bin 3 is completely replaced (namely, the mud is discharged, and the mud in the mud water bin 3 is muck), the mud tank 6, the crusher 15 and the mud discharge pipeline 7 are dismantled, the conveying device 5 is replaced, the screw machine 4 is rotated in the forward rotation and reverse rotation directions, large particles are discharged, the opening degree of the gate is gradually increased until the normal soil pressure working state is converted, and the tunneling is carried out.

When the shield tunneling machine is switched from the muddy water working state to the density-adjustable working state for tunneling, as the tunneling stratum contains a karst cave at the moment, the mud in the muddy water bin 3 escapes, and the pressure obviously changes, at the moment, the high-density mud is injected into the muddy water bin 3 through the mud feeding injection pipeline 13 for slurry supplement, meanwhile, the slurry supplement is carried out on the air cushion bin 2 through the slurry supplement pipeline 9, the density measuring pipeline 10 is opened for detecting the density of the mud in the muddy water bin 3, the detected value is compared with a density standard range providing reference for the ground, the slurry feeding amount of the mud feeding injection pipeline 13 and the slurry discharging amount of the screw machine 4 are adjusted according to the comparison result (the slurry discharging amount is realized by adjusting the rotating speed of the screw machine 4), so that the density of the muddy water bin 3 is stabilized in the standard range, and the face pressure is controlled. The slurry mixed sand and stone discharged from the slurry bin 3 are crushed by a crusher 15, diluted by a slurry tank 6 and then conveyed out of the tunnel through a slurry discharge pipeline 7.

The density-adjustable slurry-soil pressure dual-mode shield machine in the embodiment is effectively combined on the basis of an original soil pressure balance system and a slurry-water balance system, slurry-soil and soil pressure modes are switched according to different stratum geology, especially under the condition that pressure control is carried out because effective mud films cannot be formed in extremely special geology including karst caves, soil caves and the like, density regulation and control are carried out by comparing a measured value of a density measuring pipeline with a standard range provided by the ground, traditional pressure control is replaced by density pressure gradient control, and efficient tunneling under complex geology is achieved.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The density-adjustable muddy water and soil pressure double-mode shield machine comprises a shield body (1), an air cushion bin (2) arranged in front of the shield body (1), a muddy water bin (3) arranged in front of the air cushion bin (2), a cutter disc arranged in front of the muddy water bin (3), a slurry inlet pipeline (8) of which the output end is connected to the muddy water bin (3), a slurry supplementing pipeline (9) of which the input end is connected with the slurry inlet pipeline (8) and the output end is connected to the air cushion bin (2), a screw machine (4) of which the inlet is connected to the bottom of the muddy water bin (3), a slurry box (6) of which the outlet of the screw machine (4) is detachably connected, a slurry discharge pipeline (7) of which the input end is connected with the slurry box (6), and a conveying device (5) of which is detachably connected with the outlet of the screw machine (4) and is used for conveying muck, wherein the muddy water bin (3) and the air cushion bin (2) are communicated with each other in a, the shield constructs machine has muddy water operating condition, soil pressure operating condition, its characterized in that: the shield constructs machine still include input and output all with muddy water storehouse (3) are connected and are used for measuring when it opens density pipeline (10), the output of mud density in muddy water storehouse (3) are connected to muddy water storehouse (3) are used for to pour into mud injection pipeline (13) that add of high density mud in muddy water storehouse (3), the shield constructs machine still has adjustable density operating condition, works as when the shield constructs the machine is in adjustable density operating condition, muddy water storehouse (3) with air cushion storehouse (2) are linked together, advance thick liquid pipeline (8) mend thick liquid pipeline (9), add mud injection pipeline (13) and open, conveyor (5) with the export of screw machine (4) breaks away from and the export of screw machine (4) is refuted mud case (6), survey density pipeline (10) and open.

2. The density-adjustable muddy water-soil pressure dual-mode shield tunneling machine according to claim 1, characterized in that: when the shield machine is in the muddy water working state, the slurry inlet pipeline (8) and the slurry supplementing pipeline (9) are opened, the conveying device (5) is separated from the outlet of the screw machine (4), the outlet of the screw machine (4) is connected with the slurry box (6), when the shield machine is in the soil pressure working state, the space between the muddy water bin (3) and the air cushion bin (2) is blocked, the slurry inlet pipeline (8) and the slurry supplementing pipeline (9) are closed, the slurry box (6) is separated from the outlet of the screw machine, and the outlet of the screw machine (4) is connected with the conveying device (5); and when the shield tunneling machine is in a muddy water working state and a soil pressure working state, the density measuring pipeline (10) is closed.

3. The density-adjustable muddy water-soil pressure dual-mode shield tunneling machine according to claim 1, characterized in that: the density of the high-density slurry is greater than that of the slurry in the slurry inlet pipeline (8).

4. The density-adjustable muddy water-soil pressure dual-mode shield tunneling machine according to claim 1, characterized in that: the density measuring pipeline (10) comprises a pipeline, a density measuring circulating pump (101) which can enable the slurry in the slurry bin (3) to circulate through the pipeline, and a densimeter which is used for measuring the density of the slurry in the pipeline.

5. The density-adjustable muddy water-soil pressure dual-mode shield tunneling machine according to claim 1, characterized in that: still include can be when screw machine (4) are out of work with by-pass line (16) of mud output in muddy water storehouse (3), the input of by-pass line (16) with muddy water storehouse (3) are connected and the output is connected to arrange thick liquid pipeline (7).

6. The density-adjustable muddy water-soil pressure dual-mode shield tunneling machine according to claim 1, characterized in that: the device also comprises a flushing pipeline (11) of which the input end is connected with the slurry inlet pipeline (8) and the output end is connected with the central part of the cutter head and the screw machine (4).

7. The density-adjustable muddy water-soil pressure dual-mode shield tunneling machine according to claim 1, characterized in that: the slurry tank is characterized by further comprising an anti-stagnation discharge pipeline (12) with an input end connected with the lower part of the slurry bin (3) and the lower part of the air cushion bin (2) and an output end connected to the slurry tank (6), and a dilution pipeline (18) with an input end connected with the slurry inlet pipeline (8) and an output end connected to the slurry tank (6).

8. The density-adjustable muddy water-soil pressure dual-mode shield tunneling machine according to claim 1, characterized in that: and a crusher (15) capable of crushing large solid matters is arranged at an outlet of the screw machine (4).

9. The density-adjustable muddy water-soil pressure dual-mode shield tunneling machine according to claim 1, characterized in that: a communicating pipe (17) is connected between the muddy water bin (3) and the air cushion bin (2), and a valve capable of being opened and closed is arranged on the communicating pipe (17).

10. The density-adjustable muddy water-soil pressure dual-mode shield tunneling machine according to claim 1, characterized in that: the air cushion device also comprises an air pressure maintaining pipeline (14) of which the output end is connected to the upper part of the air cushion bin (2) so as to convey air into the air cushion bin (2) to keep the pressure of the air cushion bin (2) balanced.