CN114033406B - Shield machine and method for improving slag soil of large-boulder sandy pebble stratum by using same - Google Patents
Shield machine and method for improving slag soil of large-boulder sandy pebble stratum by using same Download PDFInfo
- Publication number
- CN114033406B CN114033406B CN202111358614.3A CN202111358614A CN114033406B CN 114033406 B CN114033406 B CN 114033406B CN 202111358614 A CN202111358614 A CN 202111358614A CN 114033406 B CN114033406 B CN 114033406B
- Authority
- CN
- China
- Prior art keywords
- pump station
- bentonite
- conveying pump
- clay
- type screw
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002689 soil Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000002893 slag Substances 0.000 title claims abstract description 9
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 37
- 239000000440 bentonite Substances 0.000 claims abstract description 37
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000004927 clay Substances 0.000 claims abstract description 35
- 229920000642 polymer Polymers 0.000 claims abstract description 18
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 239000004576 sand Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 8
- 239000003673 groundwater Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 6
- 239000004575 stone Substances 0.000 description 6
- 230000005641 tunneling Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000016087 ovulation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- 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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
- E21D9/087—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
-
- 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 shield machine and a method for improving slag soil of a large-drift sand pebble stratum by using the same, wherein a polymer injection pump station, a clay conveying pump station and a bentonite conveying pump station are arranged in the shield machine; the polymer injection pump station is respectively communicated with the soil bin and the belt type screw conveyor through pipelines; the clay conveying pump station and the bentonite conveying pump station are respectively communicated with the central rotary joint, the soil bin and the belt type screw conveyor through pipelines, and independent control ball valves are arranged on pipelines connecting the central rotary joint, the soil bin and the belt type screw conveyor. The method comprises the following steps: common stratum, low viscosity bentonite is transported together through clay transport pump station and bentonite transport pump station; the low-viscosity bentonite is conveyed by a bentonite conveying pump station, and the high-viscosity clay is conveyed by a clay conveying pump station; and in an emergency state, injecting the high-molecular polymer through the polymer injection pump station. The invention has the characteristics of high construction efficiency and low residue soil improvement cost.
Description
Technical Field
The invention belongs to the technical field of shield, and particularly relates to a shield machine and a method for improving slag soil of a large-drift sand pebble stratum by using the same.
Background
When the earth pressure balance shield tunneling machine is tunneling, stratum soil is cut through the cutter head, and the cut soil enters the soil bin. When the soil bin is filled with soil, the passive soil pressure is basically balanced with the soil pressure and the water pressure on the tunnel face, so that the tunnel face is in a balanced state, and the tunnel face is stabilized. The key control points are balance of cutting amount and soil discharge amount and guarantee of sealing performance of the soil bin.
The shaft type screw machine and the belt type screw machine can be configured when the large-boulder and sandy pebble stratum is tunneled by using the earth pressure balance shield machine. The shaft type screw machine is configured, so that the stability of water and soil pressure of the face can be effectively maintained, the subsidence of the earth surface can be controlled, and the risks of accidents such as water burst, mud burst, sand burst and the like can be reduced; because of the limitation of the structural form of the screw machine, pebbles which have larger diameters and are not easy to discharge are required to be crushed by a cutter head, so that the abrasion of the cutter head and the cutter is large, and the construction efficiency is low.
Compared with a shaft type screw machine, the belt type screw machine is arranged without a cutter head for crushing the ovulation stagnation stones, so that the large-diameter drifting stones and pebbles can be smoothly discharged; but is not easy to keep the stability of the water and soil pressure of the tunnel face and control the subsidence of the earth surface, and is not easy to control construction risks such as water burst, mud burst, sand burst and the like.
Disclosure of Invention
The invention aims to provide a shield machine and a method for improving slag soil of a large-drift-stone sandy pebble stratum by using the same, and aims to solve the technical problems that a belt type screw machine is not easy to maintain stability of water and soil pressure of a face and control of surface subsidence is difficult when a soil pressure balance shield machine is used for tunneling a water-rich large-drift-stone sandy pebble stratum, improve construction efficiency and reduce construction cost.
In order to achieve the purpose, the technical scheme of the invention is to design a shield machine, wherein a soil bin, a soil bin partition plate, a cutter head, a belt type screw conveyor, a central rotary joint, a polymer injection pump station, a clay conveying pump station and a bentonite conveying pump station are arranged in the shield machine; the two polymer injection pump stations are respectively communicated with the soil bin and the belt type screw conveyor through pipelines; the clay conveying pump station and the bentonite conveying pump station are respectively communicated with the central rotary joint, the soil bin and the belt type screw conveyor through pipelines, and independent control ball valves are arranged on pipelines connecting the central rotary joint, the soil bin and the belt type screw conveyor.
Furthermore, the conveying ports of the clay conveying pump station and the bentonite conveying pump station are provided with pressure flow detection units. The pressure flow detection unit is used for controlling and monitoring the physical state of the conveying fluid and feeding back control signals to each conveying pump station to realize the electrical control of the pump station.
Further, a liquid level detection device is arranged in the clay conveying pump station and the bentonite conveying pump station.
Furthermore, the conveying port of the clay conveying pump station is provided with an overflow valve. The overflow valve is used for protecting the pump.
The method for improving the slag soil of the large-boulder sandy pebble stratum by using the shield machine comprises the following steps:
when the shield machine is tunneled into a stratum with moderate groundwater content and small pebble grain size, the low-viscosity bentonite is jointly conveyed by a clay conveying pump station and a bentonite conveying pump station, and the low-viscosity bentonite can be injected into a soil bin and a belt type screw conveyor before being injected into a cutter disc panel by a central rotary joint;
when the shield machine is tunneled into a stratum with high groundwater content and larger pebble grain size, the bentonite with low viscosity is conveyed by a bentonite conveying pump station, the bentonite can be injected into a soil bin and a belt type screw conveyor before being injected into a cutter disc panel by a central rotary joint, the clay with high viscosity is conveyed by a clay conveying pump station, a control ball valve on a pipeline of the clay conveying pump station is in a closed state, and the clay with high viscosity is injected into the soil bin and the belt type screw conveyor;
when a large amount of water seepage occurs in the stratum, high-molecular polymers are injected into the soil bin and the belt type screw conveyor through the polymer injection pump station for emergency.
The invention has the advantages and beneficial effects that: the invention discloses a shield machine and a method for improving slag soil of a large-drift-stone sand pebble stratum by using the same, and solves the technical problems that when a soil pressure balance shield machine is used for tunneling a water-rich large-drift-stone sand pebble stratum, the stability of water and soil pressure of a tunnel face and the subsidence of the earth surface are not easy to control. The method has the characteristics of high construction efficiency and low residue soil improvement cost.
Drawings
Fig. 1 is a schematic structural view of the present invention.
The device comprises a soil bin 1, a soil bin partition plate 2, a cutter head 3, a belt type screw conveyor 4, a polymer injection pump station 5, a pressure flow detection unit 6, a clay conveying pump station 7, a bentonite conveying pump station 8 and a central rotary joint 9.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
Examples:
the shield machine is internally provided with a soil bin 1, a soil bin baffle 2, a cutter head 3, a belt type screw conveyor 4, a central rotary joint 9, a polymer injection pump station 5, a clay conveying pump station 7 and a bentonite conveying pump station 8; two polymer injection pump stations 5 are arranged, and the two polymer injection pump stations 5 are respectively communicated with the soil bin 1 and the belt type screw conveyor 4 through pipelines; the clay conveying pump station 7 and the bentonite conveying pump station 8 are respectively communicated with the central rotary joint 9, the soil bin 1 and the belt type screw conveyor 4 through pipelines, and independent control ball valves are arranged on pipelines connecting the central rotary joint 9, the soil bin 1 and the belt type screw conveyor 4.
And the conveying ports of the clay conveying pump station 7 and the bentonite conveying pump station 8 are provided with pressure flow detection units 6.
And liquid level detection devices are arranged in the clay conveying pump station 7 and the bentonite conveying pump station 8.
And an overflow valve is arranged at the conveying port of the clay conveying pump station 7.
The method for improving the slag soil of the large-drift sand pebble stratum by using the shield machine comprises the following steps:
when the shield machine is tunneled into a stratum with moderate groundwater content and small pebble grain size, the low-viscosity bentonite is jointly conveyed by a clay conveying pump station 7 and a bentonite conveying pump station 8, and the low-viscosity bentonite can be injected into the soil bin 1 and the belt type screw conveyor 4 before being injected into the panel of the cutter disc 3 by a central rotary joint 9;
when the shield tunneling machine tunnels into a stratum with high groundwater content and larger pebble grain size, the low-viscosity bentonite is conveyed by a bentonite conveying pump station 8, the bentonite can be also conveyed into the soil bin 1 and the belt type screw conveyor 4 before being conveyed into the panel of the cutter disc 3 by a central rotary joint 9, the high-viscosity clay is conveyed by a clay conveying pump station 7, a control ball valve on a pipeline of the high-viscosity clay is in a closed state, and the high-viscosity clay is conveyed into the soil bin 1 and the belt type screw conveyor 4;
when a large amount of water seepage occurs in the stratum, high-molecular polymers are injected into the soil bin 1 and the belt type screw conveyor 4 through the polymer injection pump station 5 for emergency.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (4)
1. A method for improving slag soil of a large-drift sand pebble stratum by using a shield machine is characterized by comprising the following steps of:
when the shield machine is tunneled into a stratum with moderate groundwater content and small pebble grain size, the low-viscosity bentonite is jointly conveyed by a clay conveying pump station and a bentonite conveying pump station, and the low-viscosity bentonite is injected into the front of the cutter disc panel through a central rotary joint;
when the shield machine is tunneled into a stratum with high groundwater content and larger pebble grain size, the bentonite with low viscosity is conveyed by a bentonite conveying pump station, the bentonite is conveyed by a clay conveying pump station before being injected into a cutterhead panel by a central rotary joint, a control ball valve on the central rotary joint on a pipeline of the clay conveying pump station is in a closed state, and the clay with high viscosity is injected into a soil bin and a belt type screw conveyor;
when a large amount of water seepage occurs in the stratum, high-molecular polymers are injected into the soil bin and the belt type screw conveyor through the polymer injection pump station for emergency;
the shield machine is internally provided with a soil bin, a soil bin partition plate, a cutter head, a belt type screw conveyor, a central rotary joint, a polymer injection pump station, a clay conveying pump station and a bentonite conveying pump station; the two polymer injection pump stations are respectively communicated with the soil bin and the belt type screw conveyor through pipelines; the clay conveying pump station and the bentonite conveying pump station are respectively communicated with the central rotary joint, the soil bin and the belt type screw conveyor through pipelines, and independent control ball valves are arranged on pipelines connecting the central rotary joint, the soil bin and the belt type screw conveyor.
2. The method according to claim 1, characterized in that: and the conveying ports of the clay conveying pump station and the bentonite conveying pump station are provided with pressure flow detection units.
3. The method according to claim 1, characterized in that: and liquid level detection devices are arranged in the clay conveying pump station and the bentonite conveying pump station.
4. The method according to claim 1, characterized in that: and an overflow valve is arranged at a conveying port of the clay conveying pump station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111358614.3A CN114033406B (en) | 2021-11-17 | 2021-11-17 | Shield machine and method for improving slag soil of large-boulder sandy pebble stratum by using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111358614.3A CN114033406B (en) | 2021-11-17 | 2021-11-17 | Shield machine and method for improving slag soil of large-boulder sandy pebble stratum by using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114033406A CN114033406A (en) | 2022-02-11 |
| CN114033406B true CN114033406B (en) | 2024-01-23 |
Family
ID=80144629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111358614.3A Active CN114033406B (en) | 2021-11-17 | 2021-11-17 | Shield machine and method for improving slag soil of large-boulder sandy pebble stratum by using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114033406B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05311990A (en) * | 1992-05-15 | 1993-11-22 | Takenaka Doboku Co Ltd | Excavated earth improvement device of earth-pressure type shield excavator |
| CN101509381A (en) * | 2008-12-24 | 2009-08-19 | 中铁隧道集团有限公司 | Composite shield structure suitable for bad ground construction |
| JP2014070405A (en) * | 2012-09-28 | 2014-04-21 | Fujita Corp | Slurry pressure shield method and slurry pressure shield machine |
| CN105545314A (en) * | 2015-12-24 | 2016-05-04 | 中铁二十二局集团第一工程有限公司 | Construction system and construction method for improving water-enriched sand layer shield waste soil |
| CN108035722A (en) * | 2017-12-11 | 2018-05-15 | 上海市基础工程集团有限公司 | Earth pressure balanced shield, EPBS high permeability sand modification method |
-
2021
- 2021-11-17 CN CN202111358614.3A patent/CN114033406B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05311990A (en) * | 1992-05-15 | 1993-11-22 | Takenaka Doboku Co Ltd | Excavated earth improvement device of earth-pressure type shield excavator |
| CN101509381A (en) * | 2008-12-24 | 2009-08-19 | 中铁隧道集团有限公司 | Composite shield structure suitable for bad ground construction |
| JP2014070405A (en) * | 2012-09-28 | 2014-04-21 | Fujita Corp | Slurry pressure shield method and slurry pressure shield machine |
| CN105545314A (en) * | 2015-12-24 | 2016-05-04 | 中铁二十二局集团第一工程有限公司 | Construction system and construction method for improving water-enriched sand layer shield waste soil |
| CN108035722A (en) * | 2017-12-11 | 2018-05-15 | 上海市基础工程集团有限公司 | Earth pressure balanced shield, EPBS high permeability sand modification method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114033406A (en) | 2022-02-11 |
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