CN216419021U - Shield constructs machine and prevents gushing dregs modifier preparation facilities - Google Patents

Abstract

The utility model discloses a shield constructs machine and prevents spouting dregs modifier preparation facilities belongs to the shield and constructs machine and prevent spouting the field. The utility model discloses a shield constructs machine and prevents gushing dregs modifier preparation facilities, it includes modifier agitator tank, lime powder charging tank, defeated material passageway, liquid nitrogen storage tank, modifier delivery pump, liquid nitrogen delivery pump and switch board, modifier agitator tank, lime powder charging tank and defeated material passageway constitute dregs modifier mixing stirring mechanism; liquid nitrogen supply mechanism has been constituteed to liquid nitrogen storage tank and liquid nitrogen delivery pump, utilize the dregs modifier thick liquid temperature in the liquid nitrogen control modifier agitator tank on the one hand, on the one hand adopt the dregs modifier to carry out the basis that improves to the consistency state of dregs, further adopt the liquid nitrogen to carry out the pertinence to the dregs and freeze the improvement, prevent gushing dregs modifier preparation facilities for the shield in local high rich water, the big gushing water volume stratum shield, have simple structure compactness, dregs improvement is effectual, prevent gushing advantages such as economic nature.

Description

Shield constructs machine and prevents gushing dregs modifier preparation facilities

Technical Field

The utility model relates to a shield constructs dregs modifier preparation facilities, more specifically says, relates to a shield constructs machine and prevents spouting dregs modifier preparation facilities.

Background

With the continuous promotion of the national urbanization process, urban subway construction enters a fast-developing climax, a subway interval tunnel is mainly excavated and constructed by a shield machine, due to the characteristics of regionality and complexity of different urban geological conditions, more construction problems also occur in the actual construction process of the shield method interval tunnel, and shield machine blocking, abnormal cutter abrasion, cutter disc mud cake, spiral machine spewing, belt conveyor muck backflow and the like directly influence the normal construction of the shield tunnel.

The spiral machine gushing is a construction problem with high frequency in shield construction, and the main reason for the occurrence of the gushing is that muck in a soil bin does not reach a good consistency state, the muck has poor water stopping performance, and more underground water gushes in the soil bin, so that the gushing is carried out to a soil outlet through the spiral machine, normal operation construction in the shield machine is influenced, and the construction risk that a tunneling surface is unstable, the inside of the shield machine and a tunnel are flooded can be caused in serious cases.

The conventional solution of the spewing of the screw machine is to improve the slag, in the prior art, bentonite is usually adopted to improve the consistency state and water stopping property of the slag, however, under some special geological conditions, the water quantity of underground water is large or the pressure resistance is high, and the conventional slag improvement method cannot solve the spewing problem; the shield model selection scheme is changed by adopting the double-screw machine scheme, so that the manufacturing cost is increased, the service efficiency is limited under the condition of local high water-rich, and the blowout prevention effect is influenced by geological conditions and has high uncertainty. Therefore, for the stratum conditions with local high water-rich and large water inrush amount, the control of the shield spiral machine gushing through the more targeted and effective muck modifier is needed. In order to meet the preparation requirement of the muck modifier in the shield process, a preparation device of the anti-gushing muck modifier of the shield machine is necessary to be designed.

Disclosure of Invention

1. Technical problem to be solved by the utility model

The utility model aims at providing a shield constructs machine and prevents spouting dregs modifier preparation facilities, with the preparation and the pump sending needs that satisfy shield structure in-process dregs modifier, the utility model discloses in, adopt bentonite and quick lime as the modifier, add quick lime powder through lime powder charging tank and mix into dregs modifier thick liquid with the bentonite stirring that bulks is good in adding the modifier agitator tank with quick lime powder, and set up liquid nitrogen feed mechanism, utilize the dregs modifier thick liquid temperature in the liquid nitrogen control modifier agitator tank on the one hand, on the basis that adopts the dregs modifier to improve the consistency state of dregs on the one hand, adopt the liquid nitrogen to carry out the pertinence to the dregs and freeze the improvement, prevent spouting dregs modifier preparation facilities for the shield of local high rich water, the big water yield stratum of gushing, have simple structure compactness, dregs improvement is effectual, dregs modifier improvement, Good anti-gushing economy and the like.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a shield constructs quick-witted prevent gushing muck improver preparation facilities, including improver agitator tank, lime powder charging vessel, defeated material passageway, liquid nitrogen storage tank, improver delivery pump, liquid nitrogen delivery pump and switch board, the discharge gate of lime powder charging vessel be connected with the lime powder charge door of improver agitator tank through defeated material passageway, the improver agitator tank on be equipped with the bentonite charge door that is used for passing through defeated thick liquid pipeline with bentonite bulking device and is connected for mixing the bentonite that is popped that the quicklime powder that is used for adding by lime powder charging vessel and bentonite bulking device convey in the improver agitator tank into muck improver thick liquid; the slurry outlet of the modifier stirring tank is connected with the feed inlet of a modifier delivery pump through a pipeline, and the slurry outlet of the modifier delivery pump is connected with a modifier injection hole through a modifier delivery pipe and used for delivering muck modifier slurry to the soil inlet of a screw machine in a soil bin of the shield tunneling machine through the modifier injection hole; the discharge port of the liquid nitrogen storage tank is respectively connected with the modifier stirring tank and the liquid nitrogen injection hole through a liquid nitrogen delivery pump, and is used for adding liquid nitrogen into the modifier stirring tank to control the temperature of the slurry of the muck modifier and injecting the liquid nitrogen into the middle part of the screw machine through the liquid nitrogen injection hole to freeze and modify the muck; the control cabinet is respectively in communication connection with the driving mechanism, the modifier delivery pump and the liquid nitrogen delivery pump in the modifier stirring tank and is used for controlling the preparation of the muck modifier slurry and the delivery action of the muck modifier slurry and the liquid nitrogen.

Furthermore, the main body of the modifying agent stirring tank is cylindrical, a stirring shaft is arranged at the center of the modifying agent stirring tank, a plurality of stirring blades are arranged on the stirring shaft, a stirring motor is arranged at the bottom of the modifying agent stirring tank, and an output shaft of the stirring motor is in transmission connection with the stirring shaft.

Furthermore, the top of improver agitator tank still be equipped with the upper cover, the upper cover constitute by fixed lid and rotation lid, fixed lid and rotation lid be semi-circular lid structure, fixed lid be fixed in on the top jar mouth of improver agitator tank, the rotation lid rotate and install on the top jar mouth of improver agitator tank, and fixed lid and rotation cover stagger from top to bottom.

Furthermore, the discharge gate of lime powder charging tank be located the bottommost of the jar body, and the discharge gate position of lime powder charging tank is higher than the lime powder charge door of modifier agitator tank, defeated material passageway slope set up, the upper end of defeated material passageway is connected with the discharge gate of lime powder charging tank, the lower extreme of defeated material passageway is connected with the lime powder charge door of modifier agitator tank.

Furthermore, the liquid nitrogen delivery pump comprises a first liquid nitrogen delivery pump and a second liquid nitrogen delivery pump, one path of a discharge hole of the liquid nitrogen storage tank is connected with the modifier stirring tank through the first liquid nitrogen delivery pump, and the other path of the discharge hole of the liquid nitrogen storage tank is connected with a liquid nitrogen injection hole in the middle of the screw machine through the second liquid nitrogen delivery pump.

Furthermore, the modifying agent stirring tank and the lime powder feeding tank are respectively fixed on the platform through mounting brackets, and the liquid nitrogen storage tank, the modifying agent delivery pump, the liquid nitrogen delivery pump and the control cabinet are all mounted on the platform.

Furthermore, the liquid nitrogen storage tank and the control cabinet are both arranged at the bottom of the lime powder feeding tank.

Furthermore, the bottom of the platform is also provided with casters.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with existing well-known technique, have following beneficial effect:

(1) the utility model discloses a shield constructs quick-witted blowout prevention dregs improver preparation facilities, it includes the improver agitator tank, lime powder charge can, defeated material passageway, liquid nitrogen storage tank, improver delivery pump, liquid nitrogen delivery pump and switch board, the improver agitator tank, lime powder charge can and defeated material passageway constitute dregs improver mixing stirring mechanism, adopt bentonite and lime as the improver, add quicklime powder into the improver agitator tank through lime powder charge can and stir the mixture with the bentonite that bulks well into dregs improver thick liquid, can full play bentonite hydroscopicity strong, the characteristics that the lime hydroscopicity is fast, have comparatively effective improvement effect to highly rich water, the stratum of large gushing water volume; the liquid nitrogen storage tank and the liquid nitrogen delivery pump form a liquid nitrogen supply mechanism, on one hand, the liquid nitrogen is used for controlling the slurry temperature of the muck modifier in the modifier stirring tank, on the other hand, on the basis of improving the consistency state of the muck by adopting the muck modifier, the liquid nitrogen is further used for carrying out targeted freezing improvement on the muck, and an efficient muck modifier preparation device is provided for improving the shield gushing-proof muck of a local high-water-rich and large-gushing-water-volume stratum, and has the advantages of simple and compact structure, good muck improvement effect, good gush-proof economy and the like;

(2) the utility model discloses a shield constructs machine and prevents gushing dregs modifier preparation facilities, the main part shape of its modifier agitator tank is the cylinder tube-shape, the center of modifier agitator tank is equipped with the (mixing) shaft, be equipped with a plurality of stirring vane on the (mixing) shaft, the bottom of modifier agitator tank is equipped with agitator motor, agitator motor's output shaft and (mixing) shaft transmission are connected, utilize the rabbling mechanism of modifier agitator tank can be fast with quicklime powder and popped bentonite stirring misce bene, make dregs modifier preparation more fast high-efficient;

(3) the utility model discloses a shield constructs machine and prevents gushing muck modifier preparation facilities, the top of its modifier agitator tank still is equipped with the upper cover, the upper cover comprises fixed lid and rotation lid, fixed lid and rotation lid are semi-circular lid structure, fixed lid is fixed in on the top jar mouth of modifier agitator tank, the rotation lid rotates and installs on the top jar mouth of modifier agitator tank, and fixed lid and rotation lid stagger from top to bottom, adopt the design of above-mentioned upper cover, can make things convenient for quick opening and closing of upper cover, conveniently add bentonite to the modifier agitator tank;

(4) the utility model discloses a shield constructs quick-witted blowout prevention dregs modifier preparation facilities, the discharge gate of its lime powder charge tank is located the bottommost of jar body, and the discharge gate position of lime powder charge tank is higher than the lime powder charge door of modifier agitator tank, defeated material passageway slope sets up, the upper end of defeated material passageway is connected with the discharge gate of lime powder charge tank, the lower extreme of defeated material passageway is connected with the lime powder charge door of modifier agitator tank, utilize the dead weight of quick lime powder in the lime powder charge tank, make quick lime powder can flow to the modifier agitator tank naturally, quick lime powder feeds simply and conveniently;

(5) the utility model discloses a shield constructs quick-witted blowout prevention dregs improver preparation facilities, its liquid nitrogen delivery pump includes first liquid nitrogen delivery pump and second liquid nitrogen delivery pump, and the discharge gate of liquid nitrogen storage tank is connected with the improver agitator tank through first liquid nitrogen delivery pump on one hand, and the liquid nitrogen filling hole in the middle part of the screw machine is connected through second liquid nitrogen delivery pump on the other hand, utilizes two liquid nitrogen delivery pumps, makes the liquid nitrogen in improver agitator tank and the screw machine carry independently, is convenient for the independent control of two way liquid nitrogen;

(6) the utility model discloses a shield constructs machine and prevents gushing dregs modifier preparation facilities, its modifier agitator tank and lime powder charging tank are fixed on the platform through the installing support respectively, and liquid nitrogen storage tank, modifier delivery pump, liquid nitrogen delivery pump and switch board are all installed on the platform, and liquid nitrogen storage tank and switch board are all located the bottom of lime powder charging tank, make the integrated level of modifier preparation facilities high, compact structure, wholeness is strong;

(7) the utility model discloses a shield constructs machine and prevents spouting dregs modifier preparation facilities, its platform bottom still is equipped with the truckle, the modifier preparation facilities's of being convenient for overall shifting.

Drawings

Fig. 1 is a schematic three-dimensional structure diagram of a device for preparing a gushing-preventing muck improver for a shield tunneling machine of the present invention;

FIG. 2 is a schematic structural view of a modifying agent stirring tank and a lime powder feeding tank in the present invention;

FIG. 3 is a schematic view of the installation positions of the modifier delivery pump and the liquid nitrogen delivery pump on the platform according to the present invention;

fig. 4 is the installation schematic diagram of the device for preparing the anti-gushing slag soil improver for the shield tunneling machine of the utility model in the shield tunneling machine.

The reference numerals in the schematic drawings illustrate:

1. a modifier stirring tank; 1-1, an upper cover; 1-1a, a fixed cover; 1-1b, rotating the cover; 1-2, a stirring shaft; 1-3, stirring blades; 1-4, a stirring motor; 2. a lime powder feeding tank; 3. a material conveying channel; 4. a platform; 4-1, a caster; 5. mounting a bracket; 6. a liquid nitrogen storage tank; 7. a modifier delivery pump; 7-1, modifier conveying pipe; 7-2, injecting a modifier; 8. a liquid nitrogen delivery pump; 8-1, a first liquid nitrogen delivery pump; 8-2, a second liquid nitrogen delivery pump; 9. a control cabinet; 10. a shield machine soil bin; 11. a screw machine; 12. and injecting liquid nitrogen into the hole.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

[ examples ]

Referring to fig. 1, the device for preparing slag modifier for preventing gushing of shield tunneling machine of this embodiment includes a modifier agitator tank 1, a lime powder feed tank 2, a material conveying channel 3, a liquid nitrogen storage tank 6, a modifier conveying pump 7, a liquid nitrogen conveying pump 8 and a control cabinet 9, the modifier agitator tank 1, the lime powder feed tank 2 and the material conveying channel 3 constitute a slag modifier mixing and stirring mechanism, a discharge port of the lime powder feed tank 2 is connected with a lime powder feed port of the modifier agitator tank 1 through the material conveying channel 3, the modifier agitator tank 1 is provided with a bentonite feed port for connecting with a bentonite bulking device through a slurry conveying pipeline, and the bentonite feed port is used for mixing the quicklime powder added from the lime powder feed tank 2 and the bulked bentonite from the bentonite bulking device in the modifier agitator tank 1 into slag modifier slurry, so as to fully exert strong water absorption of bentonite, Quick lime has the characteristic of quick water absorption, and has relatively effective improvement effect on stratums with high rich water and large gushing water; the bentonite bulking device is equipment arranged on the ground, and delivers the bulked bentonite into the modifier stirring tank 1 through a slurry delivery pipeline; a slurry discharge port of the modifier stirring tank 1 is connected with a feed port of a modifier delivery pump 7 through a pipeline, a discharge port of the modifier delivery pump 7 is connected with a modifier injection hole 7-2 through a modifier delivery pipe 7-1, and the modifier delivery pump is used for delivering muck modifier slurry to a soil inlet of a screw machine 11 in a shield machine soil bin 10 through the modifier injection hole 7-2 to quickly improve the state of muck entering the screw machine 11; the liquid nitrogen storage tank 6 and the liquid nitrogen delivery pump 8 form a liquid nitrogen supply mechanism, a discharge port of the liquid nitrogen storage tank 6 is respectively connected with the modifier stirring tank 1 and the liquid nitrogen injection hole 12 through the liquid nitrogen delivery pump 8 and is used for adding liquid nitrogen into the modifier stirring tank 1 to control the temperature of the slurry of the muck modifier and injecting the liquid nitrogen into the middle part of the screw machine 11 through the liquid nitrogen injection hole 12 to freeze and modify muck, on one hand, the liquid nitrogen is used for controlling the temperature of the slurry of the muck modifier in the modifier stirring tank 1, and on the other hand, the liquid nitrogen is further used for carrying out targeted freezing and modification on the muck on the basis of improving the consistency state of the muck by using the muck modifier; the control cabinet 9 is respectively in communication connection with the driving mechanism, the modifier delivery pump 7 and the liquid nitrogen delivery pump 8 in the modifier agitator tank 1 and is used for controlling the preparation of the muck modifier slurry and the delivery action of the muck modifier slurry and the liquid nitrogen. In the embodiment, bentonite and quicklime are used as modifiers, quicklime powder is added into a modifier stirring tank through a lime powder feeding tank and is stirred with the swelled bentonite to form a muck modifier slurry, and the prepared muck modifier slurry is conveyed to a soil inlet of a screw machine 11 in the shield construction process to rapidly improve the state of muck entering the screw machine 11; when the spiral machine 11 still contains much underground water, the liquid nitrogen supply mechanism is utilized to convey liquid nitrogen to the middle part of the spiral machine 11, the improved muck is further improved by the quick-freezing effect of the liquid nitrogen, the liquid water in the muck is reduced, and the muck is changed into a solid state through freezing, so that the state of the muck from the soil outlet of the spiral machine 11 is controlled, and the control of the gushing of the spiral machine is realized. In other words, the device for preparing the gushing-prevention muck modifier for the shield tunneling machine provides two modifiers with different properties, namely muck modifier slurry and liquid nitrogen, provides an efficient device for preparing the muck modifier for improving the gushing-prevention muck of the shield tunneling machine in the stratum with local high water enrichment and large water gushing amount, and has the advantages of simple and compact structure, good muck modification effect, good gushing-prevention economy and the like.

As shown in fig. 1 and fig. 2, in this embodiment, the main body of the modifying agent stirring tank 1 is cylindrical, a stirring shaft 1-2 is disposed at the center of the modifying agent stirring tank 1, a plurality of stirring blades 1-3 are disposed on the stirring shaft 1-2, a stirring motor 1-4 is disposed at the bottom of the modifying agent stirring tank 1, an output shaft of the stirring motor 1-4 is in transmission connection with the stirring shaft 1-2, and the stirring motor 1-4 drives the stirring shaft 1-2 and the stirring blades 1-3 to rotate to stir and mix the slurry in the modifying agent stirring tank 1, so that the bentonite and the quicklime powder are quickly mixed to form the modifying agent slurry, and the preparation of the slag soil modifying agent is more quick and efficient. Furthermore, the top of the modifying agent stirring tank 1 is also provided with an upper cover 1-1, the upper cover 1-1 consists of a fixed cover 1-1a and a rotating cover 1-1b, the fixed cover 1-1a and the rotating cover 1-1b are both in semicircular cover body structures, the fixed cover 1-1a and the rotating cover 1-1b can form a complete cover body structure, the fixed cover 1-1a is fixed on the top tank opening of the modifying agent stirring tank 1, the rotating cover 1-1b is rotatably arranged on the top tank opening of the modifying agent stirring tank 1, the fixed cover 1-1a and the rotating cover 1-1b are staggered up and down, so that the rotating cover 1-1b can rotate to coincide with the fixed cover 1-1a, thus, the opening or closing of the upper cover can be controlled by rotating the rotating cover 1-1b, and the maximum opening of the opening is half of the tank opening at the top of the modifying agent stirring tank 1. By adopting the design of the upper cover, the upper cover can be conveniently and quickly opened and closed, and bentonite is conveniently added into the modifying agent stirring tank.

As shown in fig. 2, in this embodiment, the discharge gate of lime powder feed tank 2 is located the bottommost of the jar body, and the discharge gate position of lime powder feed tank 2 is higher than the lime powder charge door of modifier agitator tank 1, defeated material passageway 3 slope sets up, the upper end of defeated material passageway 3 is connected with the discharge gate of lime powder feed tank 2, the lower extreme of defeated material passageway 3 is connected with the lime powder charge door of modifier agitator tank 1, utilize the dead weight of quicklime powder in the lime powder feed tank 2, make quicklime powder can flow to modifier agitator tank 1 naturally, quicklime powder is reinforced simple and convenient. The lime powder feeding tank 2 is mainly used for storing quicklime powder and adding quicklime into the modifying agent stirring tank 1 at a proper time. In order to control the proportion of the quicklime powder and the bentonite, a powder adding control mechanism is also arranged in the material conveying channel 3 and comprises two stirring impellers vertically arranged at the interface of the material conveying channel 3 and the lime powder feeding tank 2 and a gate arranged at the outlet of the material conveying channel 3, the control of the adding amount and the adding speed of the quicklime powder is realized through the rotating speed of the two stirring impellers and the opening degree of the gate, when the opening degree of the gate is increased and the rotating speed of the stirring impellers is increased, the adding amount and the adding speed of the quicklime powder are increased, otherwise, the adding amount of the quicklime powder is reduced, the quicklime powder can be automatically controlled and added by an automatic control system in a control cabinet 9 according to set parameters, and the automatic control of the adding amount and the adding speed of the quicklime powder is realized.

As shown in fig. 3, in this embodiment, the liquid nitrogen delivery pump 8 includes a first liquid nitrogen delivery pump 8-1 and a second liquid nitrogen delivery pump 8-2, one path of the discharge port of the liquid nitrogen storage tank 6 is connected to the modifying agent stirring tank 1 through the first liquid nitrogen delivery pump 8-1, and the other path is connected to the liquid nitrogen injection hole 12 in the middle of the screw machine 11 through the second liquid nitrogen delivery pump 8-2, and the two liquid nitrogen delivery pumps are utilized to make the liquid nitrogen delivery in the modifying agent stirring tank 1 and the screw machine 11 independent, thereby facilitating the independent control of the two paths of liquid nitrogen. The power and the interface of the connecting pipe of the modifier delivery pump 7 and the liquid nitrogen delivery pump 8 are different, and the control of the switch and the delivery flow of the pumps is mainly controlled by an automatic control system in a control cabinet 9 in a unified way. When liquid nitrogen is added into the modifier agitator tank 1, as quicklime reacts with water to generate heat, a proper amount of liquid nitrogen can be added into the modifier agitator tank 1 according to the amount of added quicklime powder to control the temperature of the slurry, and the addition amount of each modifier and additive can be determined in advance according to experiments and corresponding parameters are input into the control cabinet 9 to automatically realize addition and agitation.

Further, as shown in fig. 1 and fig. 3, the modifying agent stirring tank 1 and the lime powder feeding tank 2 are respectively fixed on the platform 4 through the mounting bracket 5, the liquid nitrogen storage tank 6, the modifying agent delivery pump 7, the liquid nitrogen delivery pump 8 and the control cabinet 9 are all mounted on the platform 4, and the liquid nitrogen storage tank 6 and the control cabinet 9 are all arranged at the bottom of the lime powder feeding tank 2, so that the modifying agent preparation device has the advantages of high integration level, compact structure and strong integrity. In order to facilitate the movement of the modifying agent preparation device, the bottom of the platform 4 is also provided with a caster 4-1.

The control cabinet 6 in this embodiment can adopt a data display operation and switch control cabinet to realize automatic control of the whole process of preparation of the muck modifier and slurry delivery of the whole system, and the touch display screen is used for inputting, modifying, setting and the like of relevant parameters and equipment parameters.

As shown in fig. 4, in the preparation apparatus for improving anti-gushing slag soil for a shield machine of the embodiment, when in use, the preparation apparatus is installed at the rear of the shield machine, an improver delivery pump 7 is connected with an improver injection hole 7-2 through an improver delivery pipe 7-1, the improver injection hole 7-2 can be arranged at a soil inlet of a screw machine 11 in a soil bin 10 of the shield machine, a liquid nitrogen injection hole 12 is arranged in the middle of the screw machine 11, and a liquid nitrogen storage tank 6 can be filled with liquid nitrogen by a liquid nitrogen delivery pump 8 to input liquid nitrogen into the middle of the screw machine 11. In order to automatically control the injection time and the addition amount of the liquid nitrogen, water pressure monitoring meters can be arranged at the front part and the rear part of the barrel of the screw machine 11 to monitor the liquid slurry of the muck at the soil outlet from the front section to the rear section of the screw machine 11 in real time, and the injection time and the injection flow of the quicklime powder, the quicklime powder and bentonite improved slurry and the liquid nitrogen are modified in real time according to the monitoring result, so that the automatic control of the spouting of the screw machine is realized. The specific implementation steps are as follows:

(1) collecting a stratum soil sample to be improved, adopting bentonite and quicklime powder as modifying agents to carry out a muck improvement test, measuring corresponding parameters such as a doping ratio and the like, simultaneously measuring the hydration heat condition of the hydration chemical reaction of the quicklime, adopting liquid nitrogen to carry out temperature control, and determining the related proportion and doping amount parameters of the modifying agents according to the test effect so as to provide references for field improvement and anti-gushing control.

(2) The swelling of the bentonite is carried out on the ground, the swelling time is controlled, the proportion relation of all the components of the mixed slurry mixed with the quicklime powder is basically ensured to meet the requirement of the mixing ratio determined by the test, and the swelling time of the bentonite before mixing can be determined by the test.

(3) And (3) starting the control cabinet 9, referring to the doping parameters of the modifying agents determined by the test, and inputting and setting the parameters in a touch screen control system on the control cabinet 9.

(4) A certain amount of quicklime powder is filled into a lime powder feeding tank 2.

(5) Inputting the swelled bentonite slurry into the modifier agitator tank 1 through a slurry conveying pipeline, and simultaneously starting the full-automatic control of each module through a touch screen on the control cabinet 9.

(6) Under the automatic control of the system, the quicklime powder in the lime powder feeding tank 2 is added into the modifying agent stirring tank 1 at a proper adding amount and adding speed to be stirred and mixed with the bentonite slurry, and meanwhile, a proper amount of liquid nitrogen is added into the modifying agent stirring tank 1 for temperature control; when the mixed slurry in the modifier agitator tank 1 reaches a certain amount, the control cabinet 9 can automatically control each module to stand by, and when the mixed slurry is reduced to a certain amount, the related operation is continued.

(7) And (3) inputting the mixed slurry in the modifying agent stirring tank 1 into two modifying agent injection holes 7-2 at the soil inlet of a screw machine 11 in the soil bin through a modifying agent delivery pump 7.

(8) All water pressure monitoring meters on the screw machine cylinder start to work, corresponding monitoring data are transmitted to a data acquisition and analysis system in the control cabinet 9 in real time, the spatial pressure distribution condition of water in the screw machine cylinder can be displayed in a display screen, and meanwhile, the automatic control system can decide whether to start liquid nitrogen injection in the middle section of the screw machine cylinder according to the water pressure condition.

(9) When the water pressure of the rear section of the screw machine cylinder body close to the unearthing port exceeds a set threshold value, the liquid nitrogen delivery pump 8 is started to inject liquid nitrogen into the middle section of the screw machine cylinder body, and the injection amount and the injection rate are controlled according to a water pressure monitoring result monitored by the water pressure monitoring meter.

(10) When the water pressure monitoring value in the screw machine is within the set limit value range, the rear gate of the screw machine is opened to discharge the muck, the opening degree of the gate is determined according to the water pressure monitoring result of the screw machine, the opening degree is changed from small to large, and meanwhile, the rotating speed and the thrust of the cutter head are controlled to ensure the balance and stability of the excavation surface of the shield cutter head.

(11) In the anti-surging control stage of the screw machine, the shield propelling speed is reduced to a reasonable value, and linkage matching of all parameters of the shield is guaranteed.

The utility model discloses a shield constructs quick-witted blowout prevention dregs improver preparation facilities, adopt bentonite and quick lime as the improver, add the improver agitator tank with quick lime powder through lime powder charging tank and mix the dregs improver thick liquid with the bentonite stirring that bulks is good in the improver agitator tank, and liquid nitrogen feed mechanism has been set up, utilize the dregs improver thick liquid temperature in the liquid nitrogen control improver agitator tank on the one hand, on the one hand on the basis that the consistency state that adopts dregs improver to dregs carries out the improvement, adopt the liquid nitrogen to carry out the pertinence to the dregs and freeze the improvement, for local high rich water, the shield in the big gushing water volume stratum prevents that gushing the dregs improvement provides an efficient dregs improver preparation facilities, and has the advantages of simple structure compactness, dregs improvement is effectual, prevent gushing economic nature good.

The present invention and its embodiments have been described above schematically, and the description is not intended to be limiting, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without creatively designing the similar structural modes and embodiments to the technical solutions, they should belong to the protection scope of the present invention.

Claims (8)

1. The utility model provides a shield constructs quick-witted prevent gushing dregs modifier preparation facilities which characterized in that: the lime powder slurry modifier comprises a modifier stirring tank (1), a lime powder feeding tank (2), a material conveying channel (3), a liquid nitrogen storage tank (6), a modifier conveying pump (7), a liquid nitrogen conveying pump (8) and a control cabinet (9), wherein a discharge port of the lime powder feeding tank (2) is connected with a lime powder feeding port of the modifier stirring tank (1) through the material conveying channel (3), and the modifier stirring tank (1) is provided with a bentonite feeding port which is connected with a bentonite bulking device through a slurry conveying pipeline and is used for stirring and mixing quicklime powder added by the lime powder feeding tank (2) and bulked bentonite conveyed by the bentonite bulking device into a slag modifier slurry in the modifier stirring tank (1); a slurry discharge port of the modifier stirring tank (1) is connected with a feed port of a modifier delivery pump (7) through a pipeline, a discharge port of the modifier delivery pump (7) is connected with a modifier injection hole (7-2) through a modifier delivery pipe (7-1) and used for delivering muck modifier slurry to a soil inlet of a screw conveyor (11) in a shield machine soil bin (10) through the modifier injection hole (7-2); the discharge port of the liquid nitrogen storage tank (6) is respectively connected with the modifier stirring tank (1) and the liquid nitrogen injection hole (12) through a liquid nitrogen delivery pump (8) and is used for adding liquid nitrogen into the modifier stirring tank (1) to control the temperature of the slurry of the muck modifier and injecting the liquid nitrogen into the middle part of the screw conveyor (11) through the liquid nitrogen injection hole (12) to freeze and modify the muck; and the control cabinet (9) is respectively in communication connection with a driving mechanism, an improver delivery pump (7) and a liquid nitrogen delivery pump (8) in the improver stirring tank (1) and is used for controlling the preparation of the muck improver slurry and the delivery action of the muck improver slurry and liquid nitrogen.

2. The shield tunneling machine gushing-preventing muck modifier preparing device according to claim 1, characterized in that: the modifier agitator tank (1) is cylindrical, the center of the modifier agitator tank (1) is provided with an agitating shaft (1-2), the agitating shaft (1-2) is provided with a plurality of agitating blades (1-3), the bottom of the modifier agitator tank (1) is provided with an agitating motor (1-4), and the output shaft of the agitating motor (1-4) is in transmission connection with the agitating shaft (1-2).

3. The shield tunneling machine anti-gushing slag soil modifier preparation device according to claim 2, characterized in that: the improved modifier mixing tank is characterized in that an upper cover (1-1) is further arranged at the top of the modifier mixing tank (1), the upper cover (1-1) is composed of a fixed cover (1-1a) and a rotating cover (1-1b), the fixed cover (1-1a) and the rotating cover (1-1b) are both of semicircular cover body structures, the fixed cover (1-1a) is fixed on a tank opening at the top of the modifier mixing tank (1), the rotating cover (1-1b) is rotatably installed on the tank opening at the top of the modifier mixing tank (1), and the fixed cover (1-1a) and the rotating cover (1-1b) are staggered up and down.

4. The shield tunneling machine anti-gushing muck improver preparation device according to claim 1, 2 or 3, characterized in that: the discharge gate of lime powder charging tank (2) be located the bottommost of the jar body, and the discharge gate position of lime powder charging tank (2) is higher than the lime powder charge door of modifier agitator tank (1), defeated material passageway (3) slope set up, the upper end of defeated material passageway (3) is connected with the discharge gate of lime powder charging tank (2), the lower extreme of defeated material passageway (3) is connected with the lime powder charge door of modifier agitator tank (1).

5. The shield tunneling machine gushing-preventing muck modifier preparing device according to claim 4, characterized in that: the liquid nitrogen conveying pump (8) comprises a first liquid nitrogen conveying pump (8-1) and a second liquid nitrogen conveying pump (8-2), one path of a discharge hole of the liquid nitrogen storage tank (6) is connected with the modifying agent stirring tank (1) through the first liquid nitrogen conveying pump (8-1), and the other path of the discharge hole is connected with a liquid nitrogen injection hole (12) in the middle of the screw machine (11) through the second liquid nitrogen conveying pump (8-2).

6. The shield tunneling machine gushing-preventing muck modifier preparing device according to claim 5, characterized in that: the modifier mixing tank (1) and the lime powder feeding tank (2) are respectively fixed on the platform (4) through mounting supports (5), and the liquid nitrogen storage tank (6), the modifier delivery pump (7), the liquid nitrogen delivery pump (8) and the control cabinet (9) are all mounted on the platform (4).

7. The shield tunneling machine anti-gushing slag soil modifier preparation device according to claim 6, characterized in that: and the liquid nitrogen storage tank (6) and the control cabinet (9) are both arranged at the bottom of the lime powder feeding tank (2).

8. The shield tunneling machine anti-gushing slag soil modifier preparation device according to claim 7, characterized in that: the bottom of the platform (4) is also provided with a caster (4-1).

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