CN111606431A - Method and system for circulating waste slurry in tunneling of shield in weathered argillaceous siltstone stratum - Google Patents
Method and system for circulating waste slurry in tunneling of shield in weathered argillaceous siltstone stratum Download PDFInfo
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- CN111606431A CN111606431A CN202010388655.6A CN202010388655A CN111606431A CN 111606431 A CN111606431 A CN 111606431A CN 202010388655 A CN202010388655 A CN 202010388655A CN 111606431 A CN111606431 A CN 111606431A
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- 239000002002 slurry Substances 0.000 title claims abstract description 245
- 239000002699 waste material Substances 0.000 title claims abstract description 48
- 230000005641 tunneling Effects 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004062 sedimentation Methods 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000000926 separation method Methods 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 238000002156 mixing Methods 0.000 claims abstract description 20
- 238000007599 discharging Methods 0.000 claims abstract description 16
- 238000004064 recycling Methods 0.000 claims abstract description 8
- 238000003860 storage Methods 0.000 claims description 47
- 239000002893 slag Substances 0.000 claims description 35
- 239000000463 material Substances 0.000 claims description 26
- 239000007790 solid phase Substances 0.000 claims description 16
- 239000004576 sand Substances 0.000 claims description 15
- 239000007791 liquid phase Substances 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 8
- 239000010865 sewage Substances 0.000 claims description 7
- 238000009412 basement excavation Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 4
- 239000000284 extract Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 5
- 238000005755 formation reaction Methods 0.000 claims 5
- 238000010276 construction Methods 0.000 description 8
- 239000002689 soil Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 235000006506 Brasenia schreberi Nutrition 0.000 description 1
- 244000267222 Brasenia schreberi Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a method and a system for circulating waste slurry in the tunneling of a shield in a weathered argillaceous siltstone stratum, wherein the method comprises the following steps: step 1, primarily selecting waste slurry, namely discharging the waste slurry to mud-water separation equipment for separation treatment by using a shield machine slurry discharge pipeline and a slurry discharge pump station; step 2, separating and dehydrating by a primary cyclone separator; step 3, separating and dehydrating by a secondary cyclone separator; step 4, dehydrating by using a horizontal spiral discharging sedimentation centrifuge; step 5, the horizontal spiral discharging sedimentation centrifuge conveys the processed available slurry to a slurry pool of the shield machine for reuse; the system comprises mud-water separation equipment; a first stage cyclone separator; a secondary cyclone separator; a sedimentation tank; a horizontal spiral discharge sedimentary centrifuge; a clear liquid pool; a pulp mixing tank; the muck and the muddy water are effectively separated by the muddy water system equipment, so that the separated mud index meets the shield tunneling mud index again, and the aim of recycling the waste mud is fulfilled.
Description
Technical Field
The invention relates to the technical field of shield tunnel construction, in particular to a method and a system for circulating waste slurry in the tunneling of a shield in a weathered argillaceous siltstone stratum.
Background
In recent years, with the rapid development of cities, urban rail transit construction is more and more, a shield tunnel construction technology becomes a main first choice for urban subway construction and urban river-crossing tunnel construction, and shield tunnels are widely applied to urban tunnel construction due to the characteristics of high construction speed, high mechanization degree, low construction noise, light pollution, low energy consumption, small influence on ground settlement and the like. The muddy water shield is filled with muddy water through a sealed compartment of the excavation surface, muddy water pressurization and external pressure balance are carried out to ensure the stability of the soil body of the excavation surface, the excavated soil enters a muddy water chamber at the front part of the shield when the shield is propelled, the soil is stirred by a stirring device, the stirred waste slurry is conveyed to the ground by a slurry pump, the waste slurry effectively separates the slurry from the residue soil on the ground through a muddy water separation system, and then the separated slurry is recycled to enter the muddy water chamber of the underground shield, so that the waste slurry recycling technology is achieved.
The technology has the technical problem of incomplete residue-soil separation in the actual application process.
Disclosure of Invention
The invention aims to establish a simple, effective, economic and convenient waste slurry treatment method, effectively separates muck from mud water by mud water system equipment, conveys separated dry slag to a slag collecting device for discharge, discharges the separated mud to a mud tank, pumps the mud in the mud tank to a centrifugal machine for further separation by a mud pump, and enables the separated mud index to meet the index of shield tunneling mud again, thereby achieving the purpose of recycling the waste slurry.
In order to realize the invention, the following technical scheme is adopted:
a method for circulating waste slurry in the tunneling of a shield in a weathered argillaceous siltstone stratum comprises the following steps:
step 4, dewatering by a horizontal spiral discharge settling centrifuge, wherein the horizontal spiral discharge settling centrifuge is communicated with a slurry storage tank of the secondary cyclone separator to obtain slurry, and the slurry is subjected to centrifugal treatment in the horizontal spiral discharge settling centrifuge;
and 5, conveying the processed usable slurry to a slurry pool of the shield machine by the horizontal spiral discharge sedimentation centrifuge for reutilization.
Further, in the step 1, after the waste slurry enters the mud-water separation equipment, the pressure of the waste slurry is buffered by the feed box, and after the waste slurry enters the feed box, the waste slurry enters the primary vibrating screen through the gravity of the waste slurry to screen out large materials.
Further, in step 4, the horizontal spiral discharge sedimentation centrifuge is communicated with the secondary cyclone separator through a sedimentation tank, the slurry treated by the secondary cyclone separator is firstly conveyed to the sedimentation tank for sedimentation in a pumping mode, the horizontal spiral discharge sedimentation centrifuge extracts the slurry treated by sedimentation in the sedimentation tank for centrifugal treatment, and a solid phase outlet of the horizontal spiral discharge sedimentation centrifuge is communicated with a slag collecting device.
Further, step 4, preparing the slurry by arranging a new slurry preparation system, and conveying the prepared slurry to a slurry mixing tank.
Further, in the step 5, a liquid phase outlet of the horizontal spiral discharge sedimentation centrifuge is communicated with a clear liquid pool, the clear liquid pool conveys the slurry to a slurry mixing pool in a pumping mode, and the slurry mixing pool conveys the available slurry to a slurry pool of the shield machine in a pumping mode for reuse.
Further, the step 4 comprises a step of conveying the slurry filtered by the secondary cyclone separator to a slurry mixing tank.
Further, the step 4 comprises a step of conveying the slurry in the clear liquid pool to a municipal sewage pipe network.
The present invention also provides the system, comprising:
the mud-water separation equipment comprises a feeding box, a primary vibrating screen, a vibrating motor, a primary slurry storage tank and a slag outlet, wherein the feeding box is communicated with a slurry discharge pipeline of the shield tunneling machine to obtain waste slurry discharged by the shield tunneling machine, the primary vibrating screen is communicated with a slurry outlet of the feeding box, the vibrating motor is used for driving the primary vibrating screen, the primary slurry storage tank is arranged below the primary vibrating screen and is used for receiving slurry falling from the primary vibrating screen, and the slag outlet is communicated with the upper surface of the primary vibrating screen;
the primary cyclone separator comprises a first slurry pump communicated with the primary slurry storage tank, a first cyclone communicated with the first slurry pump, a first slurry storage tank communicated with a liquid phase outlet of the first cyclone, a first vibrating screen communicated with a solid phase outlet of the first cyclone and a first discharge port communicated with the first vibrating screen, and the first slurry storage tank is arranged below the first vibrating screen to receive slurry falling from the first vibrating screen;
the secondary cyclone separator comprises a second slurry pump communicated with the first slurry storage tank, a second cyclone communicated with the second slurry pump, a second slurry storage tank communicated with a liquid phase outlet of the second cyclone, a second vibrating screen communicated with a solid phase outlet of the second cyclone and a second discharge port communicated with the second vibrating screen, and the second slurry storage tank is arranged below the second vibrating screen to receive slurry falling from the second vibrating screen;
the sedimentation tank is communicated with the second slurry storage tank to precipitate the slurry in the second slurry storage tank;
the horizontal spiral discharging sedimentation centrifuge is communicated with the sedimentation tank to carry out centrifugal treatment on the sedimentated mud;
the clear liquid pool is communicated with a liquid phase outlet of the horizontal spiral discharging sedimentation centrifuge so as to temporarily store the slurry treated by the horizontal spiral discharging sedimentation centrifuge;
and the slurry mixing pool is communicated with the clear liquid pool to obtain slurry and is communicated with a slurry pool of the shield tunneling machine to inject the treated slurry into the slurry pool.
Furthermore, the slag hole, the first discharge hole, the second discharge hole and the solid phase outlet of the horizontal spiral discharging sedimentation centrifuge are all communicated with a slag collecting device.
Furthermore, the clear liquid tank is also communicated with a municipal sewage pipe network to discharge redundant slurry.
The invention has the beneficial effects that:
the invention 1, through three times of filtration, cooperates with the horizontal spiral discharge sedimentation centrifuge to effectively separate the waste slurry, so that the solid phase separation precision of the waste slurry is high, the specific gravity and the sand content of the treated clean slurry are low, and the slurry index during shield tunneling is effectively ensured.
2, the mud-water separation equipment is matched with the horizontal spiral discharge sedimentation centrifuge to carry out selective solid-phase separation on the mud, and the slurrying bentonite can be selectively reserved, so that the frequency and the production quantity of newly prepared mud are reduced, and the slurrying cost is reduced.
Drawings
FIG. 1 is a process flow diagram of the process of the present invention;
FIG. 2 is a schematic view of the system of the present invention;
FIG. 3 is a schematic view of the structure of a mud-water separation device in the system of the present invention;
FIG. 4 is a schematic structural view of a primary cyclone separator in the system of the present invention;
FIG. 5 is a schematic diagram of the configuration of a two-stage cyclone in the system of the present invention;
the labels in the figure are: 1-mud-water separation equipment, 11-a primary slurry storage tank, 12-a feed box, 13-a primary vibrating screen, 14-a vibrating motor, 15-a slag hole, 2-a primary cyclone separator, 21-a first slurry storage tank, 22-a first slurry pump, 23-a first cyclone, 24-a first vibrating screen, 25-a first discharge hole, 3-a secondary cyclone separator, 31-a second slurry storage tank, 32-a second slurry pump, 33-a second cyclone, 34-a second vibrating screen, 35-a second discharge hole, 4-a horizontal spiral discharge sedimentation centrifuge, 5-a sedimentation tank, 6-a new slurry preparation system, 7-a slurry mixing tank, 8-a clear liquid tank and 9-a slurry collecting device.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a further detailed description of the invention will be given below with reference to the accompanying drawings and detailed description, it being noted that the features in the embodiments and implementations of the present application can be combined with each other without conflict.
Examples
As shown in fig. 1, the method of the present invention comprises the following steps:
step 4, dehydrating by using a horizontal spiral discharge sedimentary centrifuge 4, wherein the horizontal spiral discharge sedimentary centrifuge 4 is communicated with a second slurry storage tank 31 of the secondary cyclone separator 3 to obtain slurry, and the slurry is subjected to centrifugal treatment in the horizontal spiral discharge sedimentary centrifuge 4;
and 5, conveying the processed usable slurry to a slurry pool of the shield machine by the horizontal spiral discharge sedimentation centrifuge 4 for reutilization.
Further, in the step 1, after the waste slurry enters the mud-water separation device 1, the pressure of the waste slurry is buffered by the feed box 12, and after the waste slurry enters the feed box 12, the waste slurry enters the primary vibrating screen 13 through the gravity of the waste slurry to screen out large materials; the mud-water separation equipment 1 is MTP type series mud-water separation equipment.
Further, in step 2, slurry is conveyed between the mud-water separation device 1 and the primary cyclone separator 2 by pumping or conveying slurry according to pressure difference of different heights.
Further, in step 4, the horizontal spiral discharge sedimentation centrifuge 4 is communicated with the secondary cyclone separator 3 through a sedimentation tank 5, the slurry treated by the secondary cyclone separator 3 is firstly conveyed to the sedimentation tank 5 by a pumping mode for sedimentation, the horizontal spiral discharge sedimentation centrifuge 4 extracts the slurry treated by sedimentation in the sedimentation tank 5 for centrifugal treatment, and a solid phase outlet of the horizontal spiral discharge sedimentation centrifuge 4 is communicated with a slag collecting device 9.
Further, in step 4, two sedimentation tanks 5 are provided, wherein one sedimentation tank 5 is reserved.
Further, in step 4, a new slurry preparation system 6 for preparing slurry is provided, and the new slurry preparation system 6 is communicated with the slurry mixing tank 7 so as to convey the prepared slurry to the slurry mixing tank 7.
Further, in step 4, a new slurry preparation system 6 for preparing slurry is arranged, and the new slurry preparation system 6 is communicated with the second-stage cyclone separator 3 and the sedimentation tank 5 so as to supplement slurry to the second-stage cyclone separator 3 and the sedimentation tank 5 in real time, thereby meeting the slurry usage amount of the shield machine.
Further, the step 4 comprises a step of conveying the slurry filtered by the secondary cyclone separator 3 to a slurry mixing tank 7.
Further, the step 4 includes a step of delivering the slurry in the clear liquid tank 8 to the municipal sewage pipe network.
Further, in step 5, a liquid phase outlet of the horizontal spiral discharge sedimentary centrifuge 4 is communicated with a clear liquid pool 8, the clear liquid pool 8 conveys slurry to the slurry mixing pool 7 in a pumping manner, and the slurry mixing pool 7 conveys available slurry to a slurry pool of the shield machine for reuse in a pumping manner.
In this embodiment, the three-time gradient filtration refers to: firstly, screening large materials which are not less than 4-250 mm by using a mud-water separation device 1; secondly, screening out sand materials with the particle size of 0.074-4 mm by a primary cyclone separator 2; thirdly, screening out sand materials with the thickness of 0.020-0.074 mm through a secondary cyclone separator 3. The remaining slurry was screened by three gradients without removing the usable solid phase.
As shown in fig. 2-5, the present invention further provides the system comprising:
the slurry-water separation device 1 comprises a feeding box 12 communicated with a slurry discharge pipeline of the shield tunneling machine to obtain waste slurry discharged by the shield tunneling machine, a primary vibrating screen 13 communicated with a slurry outlet of the feeding box 12, a vibrating motor 14 used for driving the primary vibrating screen 13, a primary slurry storage tank 11 arranged below the primary vibrating screen 13 and used for receiving slurry falling from the primary vibrating screen 13, and a slag outlet 15 communicated with the upper surface of the primary vibrating screen 13, wherein the slag outlet 15 is used for conveying slag through a conveying belt or a chute;
a primary cyclone separator 2, wherein the primary cyclone separator 2 comprises a first slurry pump 22 communicated with the primary slurry storage tank 11, a first cyclone 23 communicated with the first slurry pump 22, a first slurry storage tank 21 communicated with a liquid phase outlet of the first cyclone 23, a first vibrating screen 24 communicated with a solid phase outlet of the first cyclone 23, and a first discharge port 25 communicated with the first vibrating screen 24, and the first slurry storage tank 21 is arranged below the first vibrating screen 24 to receive slurry falling from the first vibrating screen 24;
a secondary cyclone separator 3, wherein the secondary cyclone separator 3 comprises a second slurry pump 32 communicated with the first slurry storage tank 21, a second cyclone 33 communicated with the second slurry pump 32, a second slurry storage tank 31 communicated with a liquid phase outlet of the second cyclone 33, a second vibrating screen 34 communicated with a solid phase outlet of the second cyclone 33 and a second discharge port 35 communicated with the second vibrating screen 34, and the second slurry storage tank 31 is arranged below the second vibrating screen 34 to receive slurry falling from the second vibrating screen 34;
the sedimentation tank 5 is communicated with the second slurry storage tank 31 so as to sediment the slurry in the second slurry storage tank 31;
the horizontal spiral discharging sedimentation centrifuge 4 is communicated with the sedimentation tank 5 to carry out centrifugal treatment on the sedimented mud;
the clear liquid pool 8 is communicated with a liquid phase outlet of the horizontal spiral discharging sedimentation centrifuge 4 so as to temporarily store the slurry processed by the horizontal spiral discharging sedimentation centrifuge 4;
and the slurry mixing pool 7 is communicated with the clear liquid pool 8 to obtain slurry, and is communicated with a slurry pool of the shield tunneling machine to inject the treated slurry into the slurry pool.
Further, the slag hole 15, the first discharge hole 25, the second discharge hole 35 and the solid phase outlet of the horizontal spiral discharge sedimentation centrifuge 4 are all communicated with the slag collecting device 9.
Further, the first discharge port 25, the second discharge port 35 and the solid phase outlet of the horizontal spiral discharge sedimentation centrifuge 4 convey the slag to the slag collecting device 9 through a conveyer belt or a chute.
Further, the slurry mixing tank 7 is also communicated with the secondary cyclone separator 3 to obtain slurry processed by the secondary cyclone separator 3.
Further, the slag collecting device 9 is a container for collecting slag, the slag collecting device 9 is provided with a material taking machine (not shown), and the material taking machine takes out the slag collected in the slag collecting device 9 in real time.
Further, the clear liquid tank 8 is communicated with a municipal sewage pipe network to discharge redundant slurry to the municipal sewage pipe network.
In the practical application process of the invention, the slurry in the slurry mixing tank 7 is mixed with the mixed slurry prefabricated by the new slurry preparation system 6 to prepare available slurry to be conveyed to a slurry tank of the shield tunneling machine.
The present invention is not limited to the above-described embodiments, which are described in the specification and illustrated only for illustrating the principle of the present invention, but various changes and modifications may be made within the scope of the present invention as claimed without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A method for circulating waste slurry in the tunneling of a shield in a weathered argillaceous siltstone stratum is characterized by comprising the following steps:
step 1, primarily selecting waste slurry, namely discharging the waste slurry to mud-water separation equipment for separation treatment by using a slurry discharge pipeline of a shield machine and a slurry discharge pump station, wherein large materials with oversize materials not less than 4-250 mm fall to a slag collecting device, and undersize slurry enters a primary slurry storage tank of the mud-water separation equipment;
step 2, separating and dewatering by using a primary cyclone separator, wherein a primary slurry storage tank of the mud-water separation equipment is communicated with the primary cyclone separator, and the primary cyclone separator screens out sand materials with the particle size of 0.074-4 mm and delivers the sand materials to a slag material collecting device;
step 3, separating and dehydrating by using a secondary cyclone separator, wherein the secondary cyclone separator is communicated with a first slurry storage tank of the primary cyclone separator, slurry in the first slurry storage tank of the primary cyclone separator is conveyed into the secondary cyclone separator, the secondary cyclone separator is used for filtering the input slurry, screening out sand with the thickness of 0.020-0.074 mm and conveying the sand to the slag collecting device;
step 4, dewatering by a horizontal spiral discharge settling centrifuge, wherein the horizontal spiral discharge settling centrifuge is communicated with a slurry storage tank of the secondary cyclone separator to obtain slurry, and the slurry is subjected to centrifugal treatment in the horizontal spiral discharge settling centrifuge;
and 5, conveying the processed used slurry to a slurry pool of the shield machine by the horizontal spiral discharge sedimentation centrifuge for reutilization.
2. The method for recycling the waste slurry in the tunneling of the shield tunneling weathered argillaceous sandstone stratum according to claim 1, wherein in the step 1, after the waste slurry enters the mud-water separation device, the pressure of the waste slurry is buffered through a feed box, and after the waste slurry enters the feed box, the waste slurry enters a primary vibrating screen through the gravity of the waste slurry to screen out large materials.
3. The method for circulating the waste slurry in the tunneling of a weathered argillaceous sandstone formation by a shield according to claim 1, wherein in the step 4, the horizontal spiral discharge sedimentary centrifuge is communicated with the secondary cyclone separator through a sedimentation tank, the slurry treated by the secondary cyclone separator is firstly conveyed to the sedimentation tank by a pumping mode for sedimentation, the horizontal spiral discharge sedimentary centrifuge extracts the slurry treated by sedimentation in the sedimentation tank for centrifugal treatment, and a solid phase outlet of the horizontal spiral discharge sedimentary centrifuge is communicated with a slag collecting device.
4. The method for recycling the waste slurry generated in the excavation of the weathered argillaceous sandstone formation by the shield according to claim 3, wherein in the step 4, the slurry is prepared by arranging a new slurry preparation system, and the prepared slurry is conveyed to a slurry mixing tank.
5. The method for recycling the waste slurry generated in the excavation of the weathered argillaceous sandstone formation by the shield according to claim 3, wherein in the step 5, a liquid phase outlet of the horizontal spiral discharge sedimentary centrifuge is communicated with a clear liquid pool, the clear liquid pool conveys the slurry to a slurry mixing pool in a pumping manner, and the slurry mixing pool conveys the available slurry to a slurry pool of the shield machine in a pumping manner for reuse.
6. The method for recycling the waste slurry generated in the excavation of the weathered argillaceous sandstone formation by the shield according to claim 3, wherein the step 4 comprises the step of conveying the slurry filtered by the secondary cyclone separator to a slurry mixing tank.
7. The method for recycling the waste slurry generated in the tunneling of the shield in the weathered argillaceous sandstone stratum according to claim 5, wherein the step 4 comprises the step of conveying the slurry in the clear liquid pool to a municipal sewage pipe network.
8. The utility model provides a shield constructs waste slurry circulation system in excavation of morals and manners argillaceous siltstone stratum which characterized in that includes:
the mud-water separation equipment comprises a feeding box, a primary vibrating screen, a vibrating motor, a primary slurry storage tank and a slag outlet, wherein the feeding box is communicated with a slurry discharge pipeline of the shield tunneling machine to obtain waste slurry discharged by the shield tunneling machine, the primary vibrating screen is communicated with a slurry outlet of the feeding box, the vibrating motor is used for driving the primary vibrating screen, the primary slurry storage tank is arranged below the primary vibrating screen and is used for receiving slurry falling from the primary vibrating screen, and the slag outlet is communicated with the upper surface of the primary vibrating screen;
the primary cyclone separator comprises a first slurry pump communicated with the primary slurry storage tank, a first cyclone communicated with the first slurry pump, a first slurry storage tank communicated with a liquid phase outlet of the first cyclone, a first vibrating screen communicated with a solid phase outlet of the first cyclone and a first discharge port communicated with the first vibrating screen, and the first slurry storage tank is arranged below the first vibrating screen to receive slurry falling from the first vibrating screen;
the secondary cyclone separator comprises a second slurry pump communicated with the first slurry storage tank, a second cyclone communicated with the second slurry pump, a second slurry storage tank communicated with a liquid phase outlet of the second cyclone, a second vibrating screen communicated with a solid phase outlet of the second cyclone and a second discharge port communicated with the second vibrating screen, and the second slurry storage tank is arranged below the second vibrating screen to receive slurry falling from the second vibrating screen;
the sedimentation tank is communicated with the second slurry storage tank to precipitate the slurry in the second slurry storage tank;
the horizontal spiral discharging sedimentation centrifuge is communicated with the sedimentation tank to carry out centrifugal treatment on the sedimentated mud;
the clear liquid pool is communicated with a liquid phase outlet of the horizontal spiral discharging sedimentation centrifuge so as to temporarily store the slurry treated by the horizontal spiral discharging sedimentation centrifuge;
and the slurry mixing pool is communicated with the clear liquid pool to obtain slurry and is communicated with a slurry pool of the shield tunneling machine to inject the treated slurry into the slurry pool.
9. The waste slurry circulating system for shield tunneling in weathered argillaceous sandstone formations according to claim 8, wherein the slag outlet, the first discharge port, the second discharge port and the solid phase outlet of the horizontal spiral discharge settling centrifuge are all communicated with a slag collecting device.
10. The system of claim 8, wherein the clear liquid tank is further communicated with a municipal sewage pipe network to discharge excess slurry.
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| CN202010388655.6A CN111606431A (en) | 2020-05-09 | 2020-05-09 | Method and system for circulating waste slurry in tunneling of shield in weathered argillaceous siltstone stratum |
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| CN202010388655.6A CN111606431A (en) | 2020-05-09 | 2020-05-09 | Method and system for circulating waste slurry in tunneling of shield in weathered argillaceous siltstone stratum |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112390485A (en) * | 2020-12-01 | 2021-02-23 | 北京石油化工学院 | Integrated shield tunneling machine mud-water separation system |
| CN112619283A (en) * | 2020-12-30 | 2021-04-09 | 湖南路佳环保科技有限公司 | Shield muck solid-liquid separation system and separation method thereof |
| CN112759411A (en) * | 2021-02-07 | 2021-05-07 | 中铁隧道集团二处有限公司 | Slurry shield muck treatment system and method |
| CN113526703A (en) * | 2021-07-19 | 2021-10-22 | 中铁十四局集团大盾构工程有限公司 | Slurry shield tunnel slurry treatment and recycling method |
| CN113790057A (en) * | 2021-09-07 | 2021-12-14 | 中建八局轨道交通建设有限公司 | Slurry shield filter-pressing mud cake re-slurrying construction method |
| CN114180802A (en) * | 2021-11-30 | 2022-03-15 | 三川德青工程机械有限公司 | Integrated slurry treatment system |
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2020
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| CN112390485A (en) * | 2020-12-01 | 2021-02-23 | 北京石油化工学院 | Integrated shield tunneling machine mud-water separation system |
| CN112619283A (en) * | 2020-12-30 | 2021-04-09 | 湖南路佳环保科技有限公司 | Shield muck solid-liquid separation system and separation method thereof |
| CN112759411A (en) * | 2021-02-07 | 2021-05-07 | 中铁隧道集团二处有限公司 | Slurry shield muck treatment system and method |
| CN113526703A (en) * | 2021-07-19 | 2021-10-22 | 中铁十四局集团大盾构工程有限公司 | Slurry shield tunnel slurry treatment and recycling method |
| CN113526703B (en) * | 2021-07-19 | 2023-04-18 | 中铁十四局集团大盾构工程有限公司 | Slurry shield tunnel slurry treatment and recycling method |
| CN113790057A (en) * | 2021-09-07 | 2021-12-14 | 中建八局轨道交通建设有限公司 | Slurry shield filter-pressing mud cake re-slurrying construction method |
| CN114180802A (en) * | 2021-11-30 | 2022-03-15 | 三川德青工程机械有限公司 | Integrated slurry treatment system |
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