CN113202488A - Device and method for improving supporting effect of excavation face of earth pressure balance type tunnel boring machine - Google Patents
Device and method for improving supporting effect of excavation face of earth pressure balance type tunnel boring machine Download PDFInfo
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- CN113202488A CN113202488A CN202110526434.5A CN202110526434A CN113202488A CN 113202488 A CN113202488 A CN 113202488A CN 202110526434 A CN202110526434 A CN 202110526434A CN 113202488 A CN113202488 A CN 113202488A
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- grouting
- exhaust
- soil bin
- pipe
- personal computer
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- 238000009412 basement excavation Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000008093 supporting effect Effects 0.000 title claims abstract description 13
- 239000002689 soil Substances 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 239000006260 foam Substances 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 230000001276 controlling effect Effects 0.000 claims description 4
- 238000004537 pulping Methods 0.000 claims description 4
- 230000005641 tunneling Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 4
- 239000004088 foaming agent Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Images
Classifications
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- 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
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
-
- 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
- E21D9/003—Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines
-
- 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
- E21D9/093—Control of the driving shield, e.g. of the hydraulic advancing cylinders
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to a device and a method for improving the supporting effect of an excavation face of an earth pressure balance type tunnel boring machine. The method comprises an exhaust system, a grouting system and an industrial personal computer, and comprises the following steps: during the shutdown period of the shield machine, the gas pressure P1 in the soil bin is measured through a pressure sensor, meanwhile, the underground water pressure at the same height is P2 obtained by an industrial personal computer, and if P1 is not less than P2, the operations of exhausting and grouting are not needed; if P1 is less than P2, the exhaust system is controlled by the industrial personal computer to exhaust until the gas in the soil bin is completely exhausted; after the exhaust is stopped, the grouting system is opened through the industrial personal computer, the grouting pressure is set to be P2, the change of a monitoring value P1 is observed during grouting, and when the monitoring value P1= P2 of the pressure sensor, the grouting system is closed; comparing the sizes of P1 and P2 every 1h after shutdown, and repeating the steps S2-S3 when P1 < P2. The invention is convenient to operate by adding the exhaust system and the grouting system, and can effectively improve the construction quality and safety.
Description
Technical Field
The invention relates to the technical field of mechanized tunneling construction, in particular to a device and a method for improving the supporting effect of an excavation face of an earth pressure balance type tunnel boring machine.
Background
The improved residue soil is adopted for supporting and controlling the deformation of an excavation surface in the construction process of the soil pressure balance type tunnel boring machine, and the foaming agent is one of the most commonly used residue soil modifying agents. The foaming agent is mixed with pressurized air to generate a large amount of uniform and stable foam, and the foam is uniformly filled in pores among soil particles under the stirring of a cutter head, so that the internal friction angle of the muck can be effectively reduced, and the flow plasticity of the muck is improved. However, the foam will gradually dissipate over time, and the density of the gas generated after dissipation is much less than that of the improved muck, so the gas will slowly float to the top of the soil silo, and the more the gas will gather when the machine is stopped for a long time, a large cavity is formed. When the gas pressure in the cavity is smaller than the underground water pressure at the same height of the excavation surface, underground water permeates into the soil bin, and the soil body of the excavation surface is greatly deformed, so that the surface settlement is increased, the engineering quality is influenced, and a surface building is damaged in serious conditions, so that property and life loss is caused. At present, no treatment measures for the problem exist on site, and no relevant patent for solving the problem exists.
Disclosure of Invention
The invention aims to provide a device and a method for improving the supporting effect of the excavation face of an earth pressure balance type tunnel boring machine.
The above object of the present invention is achieved by the following technical solutions:
a device for improving the supporting effect of the excavation face of a soil pressure balance type tunnel boring machine comprises an exhaust system and a grouting system; the exhaust system comprises an exhaust pipe and a pressure sensor which are respectively arranged on a shield shell at the highest position in the soil bin, and a gas flowmeter and an electric regulating valve which are respectively arranged on pipe bodies of the exhaust pipe extending out of the soil bin wall, wherein a plurality of exhaust holes are arranged on a pipe section of the exhaust pipe positioned in the soil bin at equal intervals, the openings of the exhaust holes are all arranged downwards, and the electric regulating valve is arranged at the tail end of the exhaust pipe extending out of the soil bin and is used for controlling the on-off of the exhaust pipe; the grouting system comprises a grouting pipe arranged on a shield shell at the highest position in the soil bin, a grouting pump communicated with the grouting pipe and extending out of the outer end of the soil bin wall, and a grouting tank communicated with a grouting inlet of the grouting pump; a plurality of grouting holes are arranged on a pipe section of the grouting pipe in the soil bin at equal intervals, and openings of the grouting holes are all arranged downwards; and the gas flowmeter, the pressure sensor, the electric regulating valve and the grouting pump are connected with an industrial personal computer in a driving cab of the shield tunneling machine through signal cables.
The invention also discloses a method for improving the supporting effect of the excavation face of the earth pressure balance type tunnel boring machine, which comprises the following specific steps:
step S1: the monitoring value of the pressure sensor is P1 during the shutdown period of the shield machine, and the underground water pressure at the same height is P2 according to the geological survey data; if P1 is more than or equal to P2, the operations of air exhaust and grouting are not needed; if P1 is less than P2, the top of the soil bin is not filled with the improved muck, namely, after foams in the improved muck escape, the foams accumulate at the top of the soil bin to form a cavity, and the operations of air exhaust and grouting are needed;
step S2: when P1 is less than P2, the electric control valve is opened by the industrial personal computer to exhaust, the measured value V of the gas flowmeter is observed, and when the value V is basically 0, the electric control valve is closed to stop exhausting;
step S3: and after the exhaust is stopped, opening a grouting pump through an industrial personal computer, setting the grouting pressure to be P2, and injecting the slurry stored in the pulping tank into the soil bin through a grouting hole. Observing the size of P1 in the grouting process, and when P1= P2, closing the grouting pump and stopping grouting;
step S4: comparing the sizes of P1 and P2 every 1h after shutdown, and repeating the steps S2-S3 when P1 < P2.
In conclusion, the beneficial technical effects of the invention are as follows:
due to the adoption of the technical scheme, the invention can effectively solve the problems of poor supporting effect on the excavation surface, deformation of the excavation surface and large ground surface settlement caused by poor supporting effect on the excavation surface after the cavity is formed at the top of the soil bin in the long-time shutdown process of the soil pressure balanced tunnel boring machine. Through increasing exhaust system and slip casting system, can conveniently discharge the gas that escapes and gather the soil storehouse top from the improvement dregs in-process for a long time stops, later pour into the substitute gas of soil storehouse top through slip casting system with the mud that disposes to realize the effective support to the excavation face soil body, reach the effect of stabilizing the excavation face, reducing the earth's surface and subsiding. The method has simple principle and convenient operation, and can effectively improve the construction quality and safety.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of the internal structure of the soil bin of the present invention.
In the figure, 1, a pressure sensor; 2. an exhaust pipe; 3. a gas flow meter; 4. an electric control valve; 5. a grouting pipe; 6. grouting pump; 7. a pulping tank; 8. an industrial personal computer; 9. a signal cable; 10. a soil bin; 11. a soil silo wall; 12. a shield shell; 13. a cutter head; 14. an exhaust hole; 15. and (4) grouting holes.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, the device for improving the excavation face supporting effect of the earth pressure balance type tunnel boring machine disclosed by the invention comprises an exhaust system and a grouting system, wherein the exhaust system comprises an exhaust pipe 2 and a pressure sensor 1 which are respectively arranged on a shield shell 12 at the highest position in an earth cabin 10 of the shield boring machine, and a gas flowmeter 3 and an electric regulating valve 4 which are respectively arranged on a pipe body of the exhaust pipe 2 extending out of an earth cabin wall 11. The pressure sensor 1 is used for monitoring the water and soil pressure or gas pressure at the top of the soil bin 10. And exhaust holes 14 are arranged on the pipe section of the exhaust pipe 2 positioned in the soil bin 10 at equal intervals, and the openings of the exhaust holes 14 are all arranged downwards. The electric control valve 4 is arranged at the tail end of the exhaust pipe 2 extending out of the soil bin 10 and used for controlling the exhaust switch of the exhaust pipe 2. The grouting system comprises a grouting pipe 5 arranged on a shield shell 12 at the highest position in the soil bin 10, a grouting pump 6 communicated with the grouting pipe 5 and extending out of the outer end of the soil bin wall 11, and a grouting tank 7 communicated with a grouting inlet of the grouting pump 6. Grouting holes 15 are arranged on the pipe section of the grouting pipe 5 in the soil bin 10 at equal intervals, and the openings of the grouting holes 15 are all arranged downwards. The gas flowmeter 3, the pressure sensor 1, the electric regulating valve 4 and the grouting pump 6 are all connected with an industrial personal computer 8 in a driving cab of the shield tunneling machine through a signal cable 9.
The invention also discloses a method for improving the supporting effect of the excavation face of the earth pressure balance type tunnel boring machine, which comprises the following steps:
step S1: the monitoring value of the pressure sensor 1 is P1 during the shutdown of the shield machine, and the underground water pressure at the same height is P2 according to the geological survey data; if P1 is more than or equal to P2, the operations of air exhaust and grouting are not needed; if P1 is less than P2, the top of the soil bin is not filled with the improved muck, namely, after foams in the improved muck escape, the foams accumulate at the top of the soil bin to form a cavity, and the operations of air exhaust and grouting are needed;
step S2: when P1 is less than P2, the electric control valve 4 is opened by the industrial personal computer 8 to exhaust, the measured value V of the gas flowmeter 3 is observed, and the electric control valve 4 is closed to stop exhausting when the value V is basically 0;
step S3: after the exhaust is stopped, the grouting pump 6 is opened through the industrial personal computer 8, the grouting pressure is set to be P2, and the slurry stored in the pulping tank 7 is injected into the soil bin 10 through the grouting hole 15. Observing the size of P1 in the grouting process, and when P1= P2, closing the grouting pump 6 to stop grouting;
step S4: comparing the sizes of P1 and P2 every 1h after shutdown, and repeating the steps S2-S3 when P1 < P2.
It should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious variations or modifications which fall within the spirit of the invention are intended to be covered by the scope of the present invention.
Claims (2)
1. The utility model provides an improve device of effect is strutted to earth pressure balanced type tunnel boring machine excavation face which characterized in that: the device comprises an exhaust system and a grouting system; the exhaust system comprises an exhaust pipe (2) and a pressure sensor (1) which are respectively arranged on a shield shell (12) at the highest position in a soil bin (10), and a gas flowmeter (3) and an electric regulating valve (4) which are respectively arranged on pipe bodies, extending out of a soil bin wall (11), of the exhaust pipe (2), wherein a plurality of exhaust holes (14) are formed in a pipe section, located in the soil bin (10), of the exhaust pipe (2) at equal intervals, openings of the exhaust holes (14) are all arranged downwards, and the electric regulating valve (4) is arranged at the tail end, extending out of the soil bin (10), of the exhaust pipe (2) and used for controlling the on-off of the exhaust pipe (2); the grouting system comprises a grouting pipe (5) arranged on a shield shell (12) at the highest position in the soil bin (10), a grouting pump (6) communicated with the grouting pipe (5) and extending out of the outer end of the soil bin wall (11), and a grouting tank (7) communicated with a grouting inlet of the grouting pump (6); a plurality of grouting holes (15) are arranged on a pipe section of the grouting pipe (5) in the soil bin (10) at equal intervals, and openings of the grouting holes (15) are all arranged downwards; the gas flowmeter (3), the pressure sensor (1), the electric regulating valve (4) and the grouting pump (6) are connected with an industrial personal computer (8) in a driving cab of the shield tunneling machine through a signal cable (9).
2. A method for improving the supporting effect of the excavation face of the earth pressure balance type tunnel boring machine by using the device of claim 1, which is characterized in that: the method comprises the following specific steps:
step S1: the monitoring value of the pressure sensor (1) is P1 during the shutdown of the shield machine, and the underground water pressure at the same height is P2 according to the geological survey data; if P1 is more than or equal to P2, the operations of air exhaust and grouting are not needed; if P1 is less than P2, the top of the soil bin is not filled with the improved muck, namely, after foams in the improved muck escape, the foams accumulate at the top of the soil bin to form a cavity, and the operations of air exhaust and grouting are needed;
step S2: when P1 is less than P2, the electric control valve (4) is opened by the industrial personal computer (8) to exhaust, the measured value V of the gas flow meter (3) is observed, and the electric control valve (4) is closed to stop exhausting when the value V is basically 0;
step S3: and after the exhaust is stopped, the grouting pump (6) is opened through the industrial personal computer (8), the grouting pressure is set to be P2, and the slurry stored in the pulping tank (7) is injected into the soil bin (10) through the grouting hole (15). Observing the size of P1 during grouting, and when P1= P2, closing the grouting pump (6) and stopping grouting;
step S4: comparing the sizes of P1 and P2 every 1h after shutdown, and repeating the steps S2-S3 when P1 < P2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110526434.5A CN113202488A (en) | 2021-05-14 | 2021-05-14 | Device and method for improving supporting effect of excavation face of earth pressure balance type tunnel boring machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110526434.5A CN113202488A (en) | 2021-05-14 | 2021-05-14 | Device and method for improving supporting effect of excavation face of earth pressure balance type tunnel boring machine |
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| Publication Number | Publication Date |
|---|---|
| CN113202488A true CN113202488A (en) | 2021-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110526434.5A Pending CN113202488A (en) | 2021-05-14 | 2021-05-14 | Device and method for improving supporting effect of excavation face of earth pressure balance type tunnel boring machine |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05202693A (en) * | 1992-01-23 | 1993-08-10 | Ohbayashi Corp | Mechanical shield excavation method using foaming agent |
| CN201354640Y (en) * | 2008-12-09 | 2009-12-02 | 中铁隧道集团隧道设备制造有限公司 | Automatic control system for balancing shield machine excavation chamber pressure |
| CN104018844A (en) * | 2014-05-27 | 2014-09-03 | 中铁十九局集团轨道交通工程有限公司 | Shield tunneling machine water-pressure and gas-pressure balance control system and method in water-rich stratum |
| CN107642364A (en) * | 2017-09-12 | 2018-01-30 | 粤水电轨道交通建设有限公司 | Tunneling boring mud jacking shield construction method in rich water rock stratum under sensitivity building |
| CN108425681A (en) * | 2017-10-27 | 2018-08-21 | 宏润建设集团股份有限公司 | A kind of gas soil joint balance shield machine and its face balance control method |
| CN110306996A (en) * | 2019-07-25 | 2019-10-08 | 中交天和机械设备制造有限公司 | The Pneumatic auxiliary device of shield machine earth pressure balance |
| CN110486026A (en) * | 2019-09-05 | 2019-11-22 | 中铁工程装备集团有限公司 | A kind of support pressure control system |
| CN110500108A (en) * | 2019-09-24 | 2019-11-26 | 中国电建集团铁路建设有限公司 | A kind of novel balancing earth-pressure shielding machine and working method |
| CN210333675U (en) * | 2019-06-20 | 2020-04-17 | 中铁工程装备集团有限公司 | Slurry shield harmful gas collection device |
| JP2021038641A (en) * | 2019-08-29 | 2021-03-11 | 川崎重工業株式会社 | Tunnel excavator |
-
2021
- 2021-05-14 CN CN202110526434.5A patent/CN113202488A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05202693A (en) * | 1992-01-23 | 1993-08-10 | Ohbayashi Corp | Mechanical shield excavation method using foaming agent |
| CN201354640Y (en) * | 2008-12-09 | 2009-12-02 | 中铁隧道集团隧道设备制造有限公司 | Automatic control system for balancing shield machine excavation chamber pressure |
| CN104018844A (en) * | 2014-05-27 | 2014-09-03 | 中铁十九局集团轨道交通工程有限公司 | Shield tunneling machine water-pressure and gas-pressure balance control system and method in water-rich stratum |
| CN107642364A (en) * | 2017-09-12 | 2018-01-30 | 粤水电轨道交通建设有限公司 | Tunneling boring mud jacking shield construction method in rich water rock stratum under sensitivity building |
| CN108425681A (en) * | 2017-10-27 | 2018-08-21 | 宏润建设集团股份有限公司 | A kind of gas soil joint balance shield machine and its face balance control method |
| CN210333675U (en) * | 2019-06-20 | 2020-04-17 | 中铁工程装备集团有限公司 | Slurry shield harmful gas collection device |
| CN110306996A (en) * | 2019-07-25 | 2019-10-08 | 中交天和机械设备制造有限公司 | The Pneumatic auxiliary device of shield machine earth pressure balance |
| JP2021038641A (en) * | 2019-08-29 | 2021-03-11 | 川崎重工業株式会社 | Tunnel excavator |
| CN110486026A (en) * | 2019-09-05 | 2019-11-22 | 中铁工程装备集团有限公司 | A kind of support pressure control system |
| CN110500108A (en) * | 2019-09-24 | 2019-11-26 | 中国电建集团铁路建设有限公司 | A kind of novel balancing earth-pressure shielding machine and working method |
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Application publication date: 20210803 |
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