CN109488325B - Method and system for extruding type conveying muck through earth pressure balance shield pipeline - Google Patents
Method and system for extruding type conveying muck through earth pressure balance shield pipeline Download PDFInfo
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- CN109488325B CN109488325B CN201811283705.3A CN201811283705A CN109488325B CN 109488325 B CN109488325 B CN 109488325B CN 201811283705 A CN201811283705 A CN 201811283705A CN 109488325 B CN109488325 B CN 109488325B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
- E21D9/124—Helical conveying means therefor
Abstract
The invention discloses a method for conveying muck by an earth pressure balance shield pipeline in an extrusion mode, which is used for conveying muck output by an earth pressure balance shield spiral conveyor to a muck pool on the ground and comprises the following steps: s1: crushing or stirring and mixing the residue soil; s2: improving the fluidity of the slag soil; and S3: and conveying the improved residue soil by adopting an extrusion type pipeline. The invention discloses an earth pressure balance shield pipeline extrusion type muck transportation method and system, which solve the problems of low muck deslagging efficiency, high potential safety hazard, large equipment investment and large environmental influence of the existing earth pressure balance shield.
Description
Technical Field
The invention relates to the technical field of shield construction, in particular to a method and a system for conveying muck in an extrusion mode through a soil pressure balance shield pipeline.
Background
At present, an earth pressure balance shield mainly adopts a belt conveyor, a storage battery car and a gantry crane slag discharging mode, muck is discharged onto a belt of the belt conveyor from a slag discharging port of a spiral conveyor, is transported into a slag hopper dragged by the storage battery car by the belt conveyor, is transported to the bottom of a vertical shaft by the storage battery car, and is vertically lifted to the ground by the gantry crane and is discharged to a muck pool in a hoisting mode. The existing earth pressure balance shield muck transportation method has the following defects:
(1) the slag discharging efficiency is slow: during horizontal transportation, due to the fact that the space in the tunnel is limited, the wrong lane cannot be arranged, one storage battery car for loading the muck is needed to transport the muck to a station or a vertical shaft, and then the other storage battery car can drive in. Meanwhile, the vertical hoisting time of the slag bucket is long.
(2) The potential safety hazard is high: safety accidents such as vehicle sliding and derailment easily occur during horizontal transportation of the battery car with the heavy-load slag hopper in the tunnel. Meanwhile, the safety risk of vertical hoisting of the gantry crane is high.
(3) The equipment investment is large: when the muck is transported horizontally in the tunnel, a belt conveyor and a large-tonnage battery truck are required to be put into the tunnel, and when the muck is transported vertically, a large-tonnage gantry crane is required.
(4) The environmental impact is large: the dregs in the tunnel are transported in an open mode, and the ventilation condition in the tunnel is poor, so that the air quality in the tunnel is seriously influenced.
Disclosure of Invention
The invention provides an earth pressure balance shield pipeline extrusion type muck transportation method and system, and aims to solve the technical problems of low slag discharging efficiency, high potential safety hazard, large equipment investment and large environmental influence existing in the existing earth pressure balance shield muck transportation method.
According to one aspect of the invention, a method for conveying muck output by an earth pressure balance shield screw conveyor to a muck pool on the ground in an extrusion mode through an earth pressure balance shield pipeline is provided, and the method comprises the following steps:
s1: crushing or stirring and mixing the residue soil;
s2: improving the fluidity of the slag soil; and
s3: and conveying the improved residue soil by adopting an extrusion type pipeline.
Further, step S2 is specifically: adding a foaming agent, water and bentonite into the slag soil and stirring.
Further, the water content and the fluidity of the muck are detected in the stirring process.
Further, the method comprises the following steps:
s4: the pressure of the muck in the pipeline is detected in the process of carrying out extrusion type pipeline conveying on the muck, and when the pressure of the muck in the pipeline is detected to be too small, the muck in the pipeline is subjected to pressurization conveying.
Further, when it is detected that the pressure of the residue soil in the pipeline is too small, the step S4 further includes the following steps:
s5: and lubricating the residue soil in the pipeline.
Further, the bentonite, the water and the foaming agent added in the step S2 respectively have a weight ratio of 1500-2000 parts: 500-1200 parts of: 40-60 parts.
The invention also provides a system for extruding and conveying muck by using the earth pressure balance shield pipeline, which is suitable for the method, and comprises the following steps:
the residue soil grinder is used for crushing or stirring and mixing residue soil;
the stirring box is used for improving the flowability of the residue soil;
the residue soil conveying pipeline is used for conveying residue soil;
the muck pressure feeding device is used for increasing muck pressure pairs so as to enable muck to form extrusion type conveying in a muck conveying pipeline;
the muck grinder is respectively connected with the earth pressure balance shield screw conveyor and the stirring box, the stirring box is respectively connected with the muck grinder and the muck conveying pipeline, and the muck pressure feeding device is arranged at an outlet of the stirring box.
Further, the system also comprises a relay pressurizing device which is arranged on the muck conveying pipeline and is used for pressurizing and conveying the muck.
Furthermore, a water content detection device for detecting the water content of the muck and a sensor for detecting the fluidity of the muck are arranged in the stirring box.
Further, the system also comprises a muck lubricating device which is arranged on the muck conveying pipeline and used for lubricating the muck in the process of carrying out extrusion type conveying on the muck.
The invention has the following beneficial effects:
according to the soil pressure balance shield pipeline extrusion type muck transportation method, before the outlet of the soil pressure balance shield spiral conveyer is connected to the ground muck pool, muck is stirred, mixed or crushed to facilitate subsequent uniform stirring and pipeline transportation, then the water content and the fluidity of the muck are adjusted by improving the muck, so that the improved muck can be extruded and conveyed in the pipeline smoothly, the muck efficiency is improved, in addition, the muck is conveyed in a pipeline extrusion mode, a storage battery car is not required to be arranged in a tunnel to convey the muck, a gantry crane is not required to be arranged at a vertical shaft to convey the muck, and the problems that the existing soil pressure balance shield muck is low in muck discharging efficiency, high in potential safety hazard, large in equipment investment and large in environmental influence are solved.
The soil pressure balance shield pipeline extrusion type muck transportation system has the advantages.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic flow chart of an earth pressure balance shield pipeline extrusion type muck transportation method according to a preferred embodiment of the invention;
fig. 2 is a schematic block diagram of an earth pressure balance shield pipeline extrusion type muck transportation system according to another embodiment of the invention.
Fig. 3 is a schematic view of a stirring hybrid mill according to another embodiment of the present invention.
Fig. 4 is a schematic view of a crushing type grinder according to another embodiment of the present invention.
FIG. 5 is a schematic view of a stirring tank according to another embodiment of the invention.
Illustration of the drawings:
11. a residue soil grinder; 12. a stirring box; 13. a muck pressure feeding device; 14. a relay pressurizing device; 15. a muck delivery pipeline; 16. provided is a muck lubricating device.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the accompanying drawings, but the invention can be embodied in many different forms, which are defined and covered by the following description.
As shown in fig. 1, a preferred embodiment of the present invention provides an earth pressure balance shield pipe extrusion type muck transportation method, which is used for transporting muck to a muck pool on the ground in earth pressure balance shield construction, specifically, transporting muck output by an earth pressure balance shield screw conveyor to a muck pool on the ground, and can effectively improve the muck transportation efficiency, eliminate the safety risks of horizontal transportation and vertical transportation in the existing muck transportation method, reduce the equipment investment cost, and ensure a good construction environment in a tunnel. The extrusion type muck transportation method of the earth pressure balance shield pipeline comprises the following steps:
step S1: crushing or stirring and mixing the residue soil;
step S2: improving the fluidity of the slag soil; and
step S3: and conveying the improved residue soil by adopting an extrusion type pipeline.
It can be understood that, in the step S1, for the dregs generated from the composite formation, since the dregs are massive and have large size, if the dregs are directly transported by the pipeline, the pipeline may be blocked, and therefore the dregs with large size need to be firstly crushed into small pieces of dregs for transportation in the pipeline. The size of the dregs generated by the clay stratum is not very large, but the dregs have high viscosity and are easy to stick together, so that the dregs stuck together need to be stirred and mixed firstly so as to be conveyed in the pipeline.
It is understood that even after the slag is subjected to the crushing treatment or the stirring and mixing treatment in the step S1, the conveying efficiency of the slag in the pipeline is low, which is caused by the poor fluidity of the slag itself. In step S2, the fluidity of the waste soil is improved to increase the transportation speed of the waste soil in the pipeline. Specifically, a foaming agent, water and bentonite are added into the slag soil to improve the fluidity of the slag soil, so that the water content of the improved slag soil is controlled to be 40-60%, and preferably 50%. When the moisture content of the muck is in the range, the muck is in a plastic-flow plastic state, so that the extrusion conveying speed of the muck in the pipeline can be ensured, and the muck can be directly used after being conveyed to a ground muck pool. If the moisture content of the muck is too low, the extrusion conveying speed of the muck in the pipeline is slow, so that the conveying efficiency is reduced to a great extent; if the moisture content of dregs is too high, though the speed that dregs extruded in the pipeline and carried is very fast, carry and need carry out dehydration behind the ground dregs pond and just can use, increased follow-up dregs dehydration's work task, increased equipment input and manufacturing cost correspondingly, but also need add a large amount of foamers, water and bentonite and improve, greatly increased manufacturing cost. In addition, the weight ratio of the added bentonite to the added water to the added foaming agent is 1500-2000 parts: 500-1200 parts of: 40-60 parts, preferably 1600-1965 parts: 550-950 parts: 40-55 parts, more preferably 1750-1800 parts: 600-750 parts: 45-50 parts, in other embodiments of the invention, the weight component ratio of the three components can be 1550:550:45,1600:650:48, and the like. When the weight ratio of the components of the three is in the range, the water content of the improved residue soil can be controlled to be 40-60%. Adding bentonite, water and a foaming agent into the slag soil according to the weight proportion, and then stirring and mixing. Preferably, the moisture content and/or fluidity of the muck is also detected during the stirring. The operation personnel can visually observe the form of the slag soil in the stirring process, when the slag soil has certain fluidity, the TDR probe is used for detecting the water content of the slag soil and the penetration type cone tip sensor is used for detecting the fluidity of the slag soil, when the fluidity and the water content of the slag soil do not meet the performance, namely the water content is not within the range of 40-60%, the fluidity does not meet the set requirement, and bentonite, water and a foaming agent in the weight component ratio can be added into the slag soil to continuously improve the slag soil until the performance requirement is met.
Next, the following experimental group will explain the weight component ratio of the bentonite, the water and the foaming agent added in step S2.
Taking dregs produced in the same construction site with the same mass, respectively adding bentonite, water and a foaming agent into the dregs in different weight component ratios of the following 7 experimental groups, respectively and sequentially detecting the water content and the fluidity of the improved dregs of each experimental group by using a TDR probe and an injection cone tip sensor after uniformly stirring,
experimental group 1
To the residue soil, 1800 parts by weight of bentonite, 600 parts by weight of water and 50 parts by weight of a foaming agent were added.
Experimental group 2
1000 parts by weight of bentonite, 600 parts by weight of water and 50 parts by weight of a foaming agent are added to the residue soil.
Experimental group 3
To the residue soil, 2500 parts by weight of bentonite, 600 parts by weight of water and 50 parts by weight of a foaming agent were added.
Experimental group 4
To the residue soil, 1800 parts by weight of bentonite, 300 parts by weight of water and 50 parts by weight of a foaming agent were added.
Experimental group 5
To the residue soil, 1800 parts by weight of bentonite, 1000 parts by weight of water and 50 parts by weight of a foaming agent were added.
Experimental group 6
To the residue soil, 1800 parts by weight of bentonite, 600 parts by weight of water and 30 parts by weight of a foaming agent were added.
Experimental group 7
To the residue soil, 1800 parts by weight of bentonite, 600 parts by weight of water and 80 parts by weight of a foaming agent were added.
The results are shown in the following table:
according to the detection results of the experimental group 1, the experimental group 2 and the experimental group 3, the water content of the experimental group 1 is in the range of 40-60%, the improved muck is in a plastic-flow plastic state, and the fluidity of the improved muck is good. And because the addition of bentonite is too little in the experimental group 2, the moisture content of the improved dregs is higher, the improved dregs basically belong to a fluid state, although the fluidity is good, the dregs can be reused only after being conveyed to a ground dregs pool through dehydration treatment, and the production equipment investment and the production cost of the post-dehydration treatment are increased. In the experimental group 3, the moisture content of the improved residue soil is low due to the too large addition amount of the bentonite, but the bentonite plays a main role in improving the fluidity of the residue soil, so the improved residue soil still has good fluidity.
According to the detection results of the experimental group 1, the experimental group 4 and the experimental group 5, the water content in the slag soil is too low due to too little water added in the experimental group 4, but the weight proportion of the bentonite is increased relative to the experimental group 1, so that the improved slag soil still has good fluidity. In the experimental group 5, because the water content is greatly increased due to too much added water, the relative weight ratio of bentonite is reduced, and therefore, compared with the experimental group 1, the improved muck has better fluidity.
According to the detection results of the experimental group 1, the experimental group 6 and the experimental group 7, the addition amount of the foaming agent in the experimental group 6 is too small, while the addition amount of the foaming agent in the experimental group 7 is too large, and the main function of the foaming agent is to play a role in lubrication and antifriction, so that the foaming agent in the experimental group 6 cannot play a good role in lubrication and antifriction, and the improved muck only has good fluidity. In the experimental group 7, the foaming effect of the foaming agent is not very good due to too large addition amount of the foaming agent, and the foaming agent cannot play a good role in lubrication and antifriction, and the improved residue soil only has good fluidity.
Therefore, analysis of the detection results of the comprehensive experiment groups 1 to 7 shows that the weight ratio of the bentonite, the water and the foaming agent added in the step S2 is 1500 to 2000 parts: 500-1200 parts of: when the amount of the modified waste soil is 40-60 parts, the modified waste soil has the best water content, is in a plastic-flow plastic state and has the best fluidity.
It is understood that in step S3, the improved muck is pressurized to form a squeeze-type conveying of the muck in the pipeline. The pressure applied to the improved residue soil in the step S3 is 3-5 bar, preferably 3-3.5 bar, and when the pressure applied to the residue soil is within this range, the residue soil can be transported in the pipeline at a higher speed, and the pipeline can be prevented from being broken due to the excessive pressure of the residue soil. The pipeline structure needs to meet the requirements of abrasion resistance, pressure resistance and the like, the diameter of the pipeline is at least 6 inches, preferably 8 inches or 10 inches, and when the diameter of the pipeline is within the range, the dregs can be guaranteed to be rapidly conveyed in the pipeline. It can also be understood that the pipeline structure comprises a straight pipeline and a serpentine pipeline, the serpentine pipeline is arranged at one end close to the stirring box, and the length of the serpentine pipeline can be extended or shortened, so that the length of the whole pipeline structure can be adjusted according to actual needs to adapt to the change of the length of the pipeline when the shield is driven forwards. It will be appreciated that when no take-over is required, the serpentine tube is slowly stretched; when the pipe is required to be taken over, the snake-shaped pipeline is shortened, and one or more straight pipelines are connected between the snake-shaped pipe and the straight pipeline.
It can be understood that because dregs pipeline's length is longer, dregs pressure can reduce gradually when the dregs are carried in long distance pipeline, and the transport speed greatly reduced of middle section or tail section dregs at the pipeline even takes place to block up, in addition, especially carry the dregs to the shaft bottom when needing to carry out vertical transport, required dregs pressure is bigger, if dregs pressure is too little then can't carry the dregs to the dregs pond on ground. Therefore, the method for the earth pressure balance shield to convey the muck in the extrusion mode through the pipeline further comprises the step S4: the pressure of the muck in the pipeline is detected in the process of carrying out extrusion type pipeline conveying on the muck, and when the pressure of the muck in the pipeline is detected to be too small, the muck in the pipeline is subjected to pressurization conveying.
In the step S4, when the muck is conveyed in the pipeline in an extrusion manner, the muck pressure in the pipeline is monitored constantly or detected at regular time or at intervals of a certain conveying distance, and when the pressure in the pipeline is detected to be smaller than a threshold value, the muck in the pipeline is pressurized to ensure that the muck has a good conveying speed in the pipeline. The mode of pressurizing the dregs in the pipeline is to arrange a pressurizing device on the dregs conveying pipeline to increase the pressure of the dregs, and particularly, the pressurizing device is inevitably required to be added at the position of the dregs conveying pipeline at the bottom of the vertical shaft in order to realize vertical conveying. It will also be appreciated that the threshold is pre-set. The mode of detecting the pressure of the dregs in the pipeline is to arrange a soil pressure sensor on the dregs conveying pipeline for detection, and when the soil pressure sensor detects that the pressure of the dregs is lower than a threshold value, the automatic control pressurizing device is started to pressurize the dregs, so that automatic detection and pressurization are realized. In addition, preferably, when it is detected that the pressure of the slag in the pipeline is too small, the step S4 further includes the steps of: and lubricating the residue soil in the pipeline. Specifically, a muck lubricating device is arranged on a muck conveying pipeline, and lubricating grease is added into the conventional muck conveying pipeline to accelerate the conveying speed of muck. It is understood that the muck lubricating device can also be used for lubricating the muck by adding bentonite, water and a foaming agent into the pipeline according to the weight component ratio. When the soil pressure sensor detects that the pressure of the muck is lower than a threshold value, the muck lubricating device is automatically controlled to start to work, and lubricating grease or bentonite, water and a foaming agent in the mass component ratio are added into a pipeline for conveying the muck to lubricate the muck, so that the effect of efficiently discharging the muck is realized.
According to the soil pressure balance shield pipeline extrusion type muck transportation method, before the outlet of the soil pressure balance shield spiral conveyer is connected to the ground muck pool, muck is stirred, mixed or crushed to facilitate subsequent uniform stirring and pipeline transportation, then the water content and the fluidity of the muck are adjusted by improving the muck to ensure that the improved muck can be smoothly extruded and transported in the pipeline, and in addition, the muck is transported by utilizing a pipeline extrusion mode, so that the problems of low muck discharging efficiency, high potential safety hazard, large equipment investment and large environmental influence of the existing soil pressure balance shield are solved. In addition, the residual soil is in sealed conveying in the whole process after being output from the soil pressure balance shield spiral conveyor, and the air quality in the tunnel cannot be influenced.
As shown in fig. 2, another embodiment of the present invention further provides an earth pressure balance shield pipeline extrusion type muck transportation system, which is preferably applied to the above-mentioned earth pressure balance shield pipeline extrusion type muck transportation method, and the earth pressure balance shield pipeline extrusion type muck transportation system includes a muck grinder 11 for crushing or stirring and mixing muck; a stirring tank 12 for improving the fluidity of the slag soil; a residue soil conveying pipeline 15 for conveying residue soil; the muck pressure feeding device 13 is used for increasing muck pressure pairs so as to enable muck to form extrusion conveying in the muck conveying pipeline 15; the muck grinder 11 is respectively connected with the earth pressure balance shield screw conveyer and the muck grinder 11, the stirring box 12 is respectively connected with the muck grinder 11 and the muck conveying pipeline 15, and the muck pressure feeding device 13 is arranged at the outlet of the stirring box 12. It will be appreciated that the muck delivery pipe 15 is also in communication with a muck pond at the surface.
It is understood that the residue grinding machine 11 includes a stirring mixing type grinding machine (as shown in fig. 3) and a crushing type grinding machine (as shown in fig. 3), wherein the crushing type grinding machine is used for the residue generated in the composite stratum, and the residue is massive and large in size, so that the residue can block the residue conveying pipe 15 if the residue is directly introduced into the residue conveying pipe 15 for conveying, and the residue with large size needs to be crushed for conveying in the residue conveying pipe 15. The residue soil produced by the stirring mixed type grinding machine aiming at the clay stratum is not very large in size, but is easy to adhere together due to high viscosity, so that the stirring mixed type grinding machine can stir and mix the adhered residue soil so as to be convenient for conveying in a pipeline. In addition, the muck grinder 11 is hermetically connected with an earth pressure balance shield screw conveyor.
It will be appreciated that, as shown in fig. 5, the mixing tank 12 is preferably provided with an opening (not shown) for adding bentonite, water and a foaming agent, the mass components of the added bentonite, water and foaming agent being as described in the preferred embodiment of the present invention. In addition, the stirring box 12 is further provided with an observation window 121 so that an operator can observe the shape of the residue soil in the stirring box 12. The stirring box 12 is further provided with a moisture content detection device 123 for detecting moisture content of the slag soil and a sensor 122 for detecting fluidity of the slag soil, the moisture content detection device 123 is preferably a TDR (Time Domain deflectometer) probe or a moisture meter, and the sensor 122 is preferably an injection type cone tip sensor.
It is understood that, as a preferred mode, a plurality of soil pressure sensors (not shown) for detecting the pressure of the soil in the soil conveying pipe 15 are arranged on the soil conveying pipe 15 at intervals.
It can be understood that, as a preferable mode, the earth pressure balance shield pipe extrusion type muck transportation system further comprises a relay pressurizing device 14 which is arranged on the muck conveying pipe 15 and is used for pressurizing and conveying the muck, and the relay pressurizing device 14 is preferably arranged at the middle section and/or the tail section of the muck conveying pipe 15. Because dregs pipeline 15's length is longer, dregs pressure can be less gradually when the dregs are carried in long distance's pipeline, still can take place to block up at the conveying speed greatly reduced of dregs at dregs pipeline 15's middle section or tail section, in addition, especially carry the dregs to the shaft bottom when needing to carry out the vertical transportation, required dregs pressure is bigger, if dregs pressure too little then can't carry the dregs to the dregs pond on ground. The relay pressurizing device 14 can further pressurize the slag to ensure that the slag can be rapidly conveyed in the slag conveying pipeline 15, and ensure efficient slag tapping.
It will be appreciated that the system also preferably includes a muck lubricating device 16 disposed on the muck conveying pipe 15 for lubricating the muck during the extrusion conveying of the muck. The muck lubricating device 16 can feed lubricating grease or bentonite, water and foaming agent with the mass component ratio as described above into the muck conveying pipeline 15 to lubricate the muck and ensure efficient slag discharge.
It can be understood that, as a preferred option, the system further includes a controller (not shown in the figure), the controller is respectively connected to the soil pressure sensor, the relay pressure device 14 and the muck lubricating device 16, the controller stores therein a muck pressure threshold in advance, when the soil pressure sensor detects a muck pressure value and feeds back the detected value to the controller, the controller compares the detected value with the threshold, and when the detected value is smaller than the threshold, the controller controls the relay pressure device 14 to start working to further pressurize the muck and/or controls the muck lubricating device 16 to start working to lubricate the muck by inputting grease or bentonite, water and foaming agent with the mass component ratio as described above into the muck conveying pipeline 15, thereby automatically controlling the conveying speed of the muck and reducing the working intensity of workers.
According to the soil pressure balance shield pipeline extrusion type muck conveying system, the muck grinding machine, the stirring box, the muck pressure conveying device and the muck conveying pipeline are sequentially arranged at the outlet of the soil pressure balance shield screw conveyer, muck enters the stirring box through secondary crushing by the grinding machine for secondary improvement and is uniformly stirred, and the muck is conveyed to the ground muck pool through the pipeline by the muck pressure conveying device in an extrusion mode, so that the problems that the existing soil pressure balance shield muck is low in muck discharging efficiency, high in potential safety hazard, large in equipment investment and large in environmental influence are solved. In addition, the pressure of the slag soil is detected in the process of extruding and conveying the slag soil, the relay supercharging device is controlled to further pressurize the slag soil according to the detection result, and the slag soil lubricating device is controlled to lubricate the slag soil, so that efficient slag discharging is realized. In addition, the earth pressure balance shield spiral conveyor, the muck grinder, the stirring box, the muck pressure feeding device, the muck conveying pipeline, the relay supercharging device and the muck lubricating device are connected in a sealing mode, the muck is conveyed in a sealing mode in the whole process, and air quality in the tunnel cannot be affected.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. The utility model provides a method of earth pressure balance shield tunnel extrusion formula transport dregs, its dregs that is used for will earth pressure balance shield constructs the output of screw conveyer carry to the dregs pond on ground which characterized in that:
which comprises the following steps:
s1: crushing or stirring and mixing the residue soil;
s2: the method for improving the flowability of the muck specifically comprises the following steps: adding a foaming agent, water and bentonite into the slag soil, stirring and mixing, wherein the weight component ratio of the added bentonite to the added water to the added foaming agent is 1500-2000 parts: 500-1200 parts of: 40-60 parts of the slag, wherein the slag is visually observed in the stirring process, when the slag has certain fluidity, the TDR probe is used for detecting the water content of the slag and the penetration type cone tip sensor is used for detecting the fluidity of the slag, so that the water content of the improved slag is controlled to be 40% -60%, and when the water content of the slag is in the range, the slag is in a plastic-flow plastic state, so that the extrusion conveying speed of the slag in a pipeline can be ensured, and the slag can be directly used after being conveyed to a ground slag pool; and
s3: conveying the improved muck by adopting an extrusion type pipeline;
s4: the residual soil pressure in the pipeline is detected in the process of extruding type pipeline conveying of the residual soil, when the residual soil pressure in the pipeline is detected to be too small, the residual soil in the pipeline is subjected to pressurization conveying, and the residual soil in the pipeline is lubricated.
2. The system for the extrusion type conveying of the muck by the earth pressure balance shield pipeline is suitable for the method as claimed in claim 1, and is characterized in that:
the system comprises:
the residue soil grinder is used for crushing or stirring and mixing residue soil;
the stirring box is used for improving the flowability of the residue soil; be provided with the moisture content detection device who is used for detecting the dregs moisture content in the agitator tank and detect the mobile sensor of dregs, still be provided with the opening on the agitator tank in order to be used for adding bentonite, water and foamer, the bentonite of adding, water and foamer three's weight component ratio are 1500 ~ 2000 parts respectively: 500-1200 parts of: 40-60 parts;
the residue soil conveying pipeline is used for conveying residue soil;
the muck pressure conveying device is used for increasing the muck pressure so as to enable the muck to form extrusion type conveying in the muck conveying pipeline;
the muck grinder is respectively connected with the earth pressure balance shield spiral conveyor and the stirring box, the stirring box is respectively connected with the muck grinder and the muck conveying pipeline, and the muck pressure feeding device is arranged at an outlet of the stirring box;
the relay pressurizing device is arranged on the muck conveying pipeline and is used for pressurizing and conveying the muck;
the muck lubricating device is arranged on the muck conveying pipeline and used for lubricating the muck in the extrusion conveying process of the muck.
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| JPS51114301A (en) * | 1975-04-01 | 1976-10-08 | Kajima Corp | Device for excavating shaft |
| JPS6052276B2 (en) * | 1978-08-11 | 1985-11-18 | 日本産業機械株式会社 | excavation lift |
| CN101666210A (en) * | 2008-09-05 | 2010-03-10 | 上海广联建设发展有限公司 | Reamer bit of bored well |
| CN102425429B (en) * | 2011-11-22 | 2014-03-26 | 中交第二航务工程局有限公司 | Method for pumping dregs through earth pressure balance shield |
| CN103195431B (en) * | 2013-03-29 | 2015-05-06 | 中国铁建重工集团有限公司 | Slag tapping system and method for full face tunnel boring machine of deep vertical shaft |
| CN103982195A (en) * | 2014-05-13 | 2014-08-13 | 淮南矿业(集团)有限责任公司 | Full-face tunnel boring machine |
| CN108678766A (en) * | 2018-07-03 | 2018-10-19 | 中国铁建重工集团有限公司 | A kind of development machine slag-tapping system and driving machine equipment |
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2018
- 2018-10-31 CN CN201811283705.3A patent/CN109488325B/en active Active
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