CN110939453B - Cutter real-time monitoring system and normal-pressure cutter changing method - Google Patents
Cutter real-time monitoring system and normal-pressure cutter changing method Download PDFInfo
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- CN110939453B CN110939453B CN201911330540.5A CN201911330540A CN110939453B CN 110939453 B CN110939453 B CN 110939453B CN 201911330540 A CN201911330540 A CN 201911330540A CN 110939453 B CN110939453 B CN 110939453B
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012544 monitoring process Methods 0.000 title claims abstract description 22
- 239000002689 soil Substances 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 230000005641 tunneling Effects 0.000 claims abstract description 15
- 238000005553 drilling Methods 0.000 claims abstract description 14
- 239000003507 refrigerant Substances 0.000 claims abstract description 7
- 238000005520 cutting process Methods 0.000 claims abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000008014 freezing Effects 0.000 claims description 8
- 238000007710 freezing Methods 0.000 claims description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 238000011010 flushing procedure Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000005299 abrasion Methods 0.000 claims description 4
- 241000219307 Atriplex rosea Species 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims 3
- 239000002826 coolant Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 13
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000011435 rock Substances 0.000 description 4
- 230000002411 adverse Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Classifications
-
- 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
- E21D9/08—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/11—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means
- E02D3/115—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means by freezing
-
- 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
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
-
- 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)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Soil Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a cutter real-time monitoring system and a normal-pressure cutter changing method, wherein the cutter real-time monitoring system comprises a DCRM hob rotation detection system arranged on each hob capable of being replaced at normal pressure, and the operation state of a cutter is obtained in time; before the tool changing under normal pressure, the corresponding soil body is frozen and reinforced by adopting a mode of injecting a refrigerant from ground drilling, so that the shield machine has simple structure, low maintenance and construction cost and short construction time. The double-shaft double-edge normal pressure cutter is adopted, the replaceable cutting cutter is divided into a plurality of types according to different lengths, and each type of cutter changing portal frame corresponding to different lengths solves the technical problems that shield equipment for shield tunnel construction in the prior art is inconvenient in cutter changing, the cutter is abraded greatly in the tunneling process, the cutter is prone to eccentric wear and the cutter ring is prone to crack, and shield tunneling is safe and smooth.
Description
Technical Field
The invention relates to the technical field of tunnel shield construction, in particular to a cutter real-time monitoring system and a normal-pressure cutter changing method.
Background
The shield equipment is the key for success and failure of the project of the ultra-large diameter shield tunnel, and the ultra-large diameter shield tunnel inevitably encounters a plurality of soil layers in the tunneling process due to the cross section size and the structure top earthing requirement, so that the shield equipment needs higher reliability and technical advancement to meet the complex environments such as hydrology, geology and buildings along the line which may appear at the site of the tunnel. For example, the shield equipment may encounter granite with a strength close to 100MPa at a deeper underground position, and only depends on direct cutting of the shield equipment, so that the shield equipment has low efficiency, poor construction reliability and large risk, and therefore, the shield equipment has strong adaptability and robustness. Chinese patent publication No. CN203905953U describes a hard rock rapid tunneling machine, which comprises a casing, a cutter head is mounted at the front end of the casing, the cutter head comprises a central cutter head arranged along the central axis of the casing, a plurality of block cutter heads are arranged on the periphery of the central cutter head, each block cutter head is detachably connected with the central cutter head, and adjacent block cutter heads are also detachably connected; the front part of the shell is provided with a channel which can enter the front end of the shell along the radial direction. The fast hard rock tunneling machine aims to enable all components of the cutter head to be detachable, so that when a certain part of the cutter head is abraded, the part is detached from the integral cutter head and then maintained. In addition, the fast hard rock tunneling machine is inconvenient to change tools, and the anti-risk capability of preventing a cutter head from being trapped is poor.
The cutter is worn greatly in the shield tunneling process, adverse phenomena such as eccentric wear of the cutter and cracking of a cutter ring are easy to occur, and if the cutter is worn too much and is not replaced in time, the rock breaking effect of the shield can be seriously influenced.
When the cutter is changed under normal pressure, the cutter head and the soil layer around the shield body are often required to be reinforced so as to ensure the safety of cutter changing construction, a freezing device arranged on the shield machine is used for freezing and reinforcing the soil layer in the prior art, but the shield machine is often complex in structure, high in manufacturing cost, not easy to maintain and high in construction cost, and the freezing mode is often required for 10-20 days, so that the construction time is long, and the construction period is delayed.
In addition, as the number of cutters on the cutter head of the shield machine is large, construction is inconvenient in the normal-pressure cutter changing process, the time is long, the difficulty is high, and the risk coefficient of a cutter changing worker is increased.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a real-time cutter monitoring system and a normal-pressure cutter changing method, and the specific technical scheme is as follows:
the real-time cutter monitoring system comprises a DCRM hob rotation detection system arranged on each hob capable of being replaced at normal pressure, the DCRM hob rotation detection system comprises a cutter rotation detection device, a cutter temperature detection device and a cutter abrasion loss detection device, the cutter rotation detection device comprises magnetic steel and a rotating speed sensor, the real-time cutter monitoring system further comprises a data sending device, a data receiving device and a monitoring display device, and the data sending device is connected with the data receiving device in a wireless mode; during the tunneling process, through cutter wear monitoring and wear inspection, when the wear loss of the side hob exceeds 10mm, the side hob needs to be replaced, and at the moment, normal pressure tool changing is carried out according to a normal pressure tool changing method.
Further, before changing the cutter under normal pressure, the soil around the cutter head and the shield body is frozen, and the method specifically comprises the following steps: (1) and determining the range of the soil body to be frozen around the cutter head and the shield body according to the actual condition of the soil layer. (2) After the range of the soil body needing to be frozen is determined, drilling holes downwards on the corresponding ground by using a drilling machine, wherein the number of the drilled holes is determined according to the range, the water content, the compactness and other conditions of the soil body needing to be frozen; (3) and (4) filling a refrigerant liquid nitrogen into each drill hole, and freezing the soil body in the corresponding range. (4) And the muddy water circulation system continuously works until impurities in the muddy water bin are emptied, and the temperature in the muddy water bin is controlled below 0 ℃ by utilizing the freezing function in the shield tunneling machine.
Further, the drilling machine is a full-circle casing drilling machine, and the refrigerant is liquid nitrogen or liquid carbon dioxide.
Further, the normal pressure tool changing comprises the following specific steps:
(1) preparation work: a. preparing a tool: 2 chain blocks, 24 ratchet wrenches, 1 ratchet wrench 30, 1 double offset ring spanner 24, 4U-shaped clamps and 2 sections of 1M steel wire ropes; b. before tool changing, the hob to be changed is well installed by a tool rest, well installed by a feeding steel wire rope and a U-shaped clamp, and the hob is placed according to the position where the hob is to be installed, and the changeable cutting hob is divided into three types according to different lengths, wherein each type corresponds to a tool changing portal frame with different lengths;
(2) tool changing flow: the cutter is divided into three types according to different lengths: 930 long knife 69, 1090 long knife 6, 1005 long knife 5; a. after the tool and the portal frame are transported into the cutter head, the portal frame is installed, one side of the opening at the side edge of the portal frame is installed on the outer side, and a pressure gauge is installed; b. removing the safety bolt on the cutter holder; c. pulling out the cutter backwards; d. closing the next gate and closing the previous gate; both the two gates need to be closed to be within the red scale lines, if the gates leak, the gate bolts are fastened to be 50 N.M, and then the gates are opened and closed for several times to see whether the gates leak or not; e. watching whether the reading of the pressure gauge is 0, if not, opening the ball valve, and closing the ball valve after the pressure is removed to ensure that the reading of the pressure gauge is 0; f. the bolt of the cutter base is removed, and the cutter is sent out of the cutter head; g. after a new cutter is fed in, the cutter is roughly fixed by a positioning pin, and a cutter head base bolt is installed; h. opening the previous gate, then opening the next gate, and flushing the two gates by using a flushing valve before opening the gates; i. pushing the cutter forward; j. installing a safety bolt; k. and (4) dismantling the portal frame, conveying the portal frame and the tool out, and finishing tool changing.
Further, the cutter is a double-shaft double-edge normal pressure cutter.
According to the cutter real-time monitoring system and the normal-pressure cutter changing method, the cutter running state is detected in time through the cutter real-time monitoring system, and the side hob is replaced in time when the abrasion loss exceeds 10 mm; specifically, a DCRM hob rotation monitoring system is installed on the hob capable of being replaced under normal pressure, and the operation state of the hob is timely known through rotation detection and feedback of the temperature and rotation quality data of the hob.
Before the tool changing under normal pressure, the corresponding soil body is frozen and reinforced by adopting a mode of injecting a refrigerant from a ground drilling hole, so that the shield machine has simple structure, low maintenance and construction cost and short construction time.
The double-shaft double-edge normal pressure cutter is adopted, the replaceable cutting cutter is divided into a plurality of types according to different lengths, and each type of cutter changing portal frame corresponding to different lengths solves the technical problems that shield equipment for shield tunnel construction in the prior art is inconvenient in cutter changing, the cutter is abraded greatly in the tunneling process, the cutter is prone to eccentric wear and the cutter ring is prone to crack, and shield tunneling is safe and smooth.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments in order to make the above objects, features and advantages more apparent and understandable.
The invention relates to a cutter real-time monitoring system and a normal-pressure cutter changing method, wherein the cutter real-time monitoring system comprises a DCRM hob rotation detection system arranged on each hob capable of being replaced at normal pressure, the DCRM hob rotation detection system comprises a cutter rotation detection device, a cutter temperature detection device and a cutter abrasion loss detection device, the cutter rotation detection device comprises magnetic steel and a rotating speed sensor, the cutter real-time monitoring system also comprises a data sending device, a data receiving device and a monitoring display device, and the data sending device is connected with the data receiving device in a wireless mode; during the tunneling process, through cutter wear monitoring and wear inspection, when the wear loss of the side hob exceeds 10mm, the side hob needs to be replaced, and at the moment, normal pressure tool changing is carried out according to a normal pressure tool changing method.
Further, before changing the cutter under normal pressure, the soil around the cutter head and the shield body is frozen, and the method specifically comprises the following steps: (1) and determining the range of the soil body to be frozen around the cutter head and the shield body according to the actual condition of the soil layer. (2) After the range of the soil body needing to be frozen is determined, drilling holes downwards on the corresponding ground by using a drilling machine, wherein the number of the drilled holes is determined according to the range, the water content, the compactness and other conditions of the soil body needing to be frozen; (3) and (4) filling a refrigerant liquid nitrogen into each drill hole, and freezing the soil body in the corresponding range. (4) And the muddy water circulation system continuously works until impurities in the muddy water bin are emptied, and the temperature in the muddy water bin is controlled below 0 ℃ by utilizing the freezing function in the shield tunneling machine.
Further, the drilling machine is a full-circle casing drilling machine, and the refrigerant is liquid nitrogen or liquid carbon dioxide.
Further, the normal pressure tool changing comprises the following specific steps:
(1) preparation work: a. preparing a tool: 2 chain blocks, 24 ratchet wrenches, 1 ratchet wrench 30, 1 double offset ring spanner 24, 4U-shaped clamps and 2 sections of 1M steel wire ropes; b. before tool changing, the hob to be changed is well installed by a tool rest, well installed by a feeding steel wire rope and a U-shaped clamp, and the hob is placed according to the position where the hob is to be installed, and the changeable cutting hob is divided into three types according to different lengths, wherein each type corresponds to a tool changing portal frame with different lengths;
(2) tool changing flow: the cutter is divided into three types according to different lengths: 930 long knife 69, 1090 long knife 6, 1005 long knife 5; a. after the tool and the portal frame are transported into the cutter head, the portal frame is installed, one side of the opening at the side edge of the portal frame is installed on the outer side, and a pressure gauge is installed; b. removing the safety bolt on the cutter holder; c. pulling out the cutter backwards; d. closing the next gate and closing the previous gate; both the two gates need to be closed to be within the red scale lines, if the gates leak, the gate bolts are fastened to be 50 N.M, and then the gates are opened and closed for several times to see whether the gates leak or not; e. watching whether the reading of the pressure gauge is 0, if not, opening the ball valve, and closing the ball valve after the pressure is removed to ensure that the reading of the pressure gauge is 0; f. the bolt of the cutter base is removed, and the cutter is sent out of the cutter head; g. after a new cutter is fed in, the cutter is roughly fixed by a positioning pin, and a cutter head base bolt is installed; h. opening the previous gate, then opening the next gate, and flushing the two gates by using a flushing valve before opening the gates; i. pushing the cutter forward; j. installing a safety bolt; k. and (4) dismantling the portal frame, conveying the portal frame and the tool out, and finishing tool changing.
Further, the cutter is a double-shaft double-edge normal pressure cutter.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and its inventive concept within the technical scope of the present invention.
Claims (4)
1. A normal pressure tool changing method is characterized in that: the real-time cutter monitoring system comprises a DCRM hob rotation detection system arranged on each hob capable of being replaced at normal pressure, the DCRM hob rotation detection system comprises a cutter rotation detection device, a cutter temperature detection device and a cutter abrasion loss detection device, the cutter rotation detection device comprises magnetic steel and a rotating speed sensor, the real-time cutter monitoring system further comprises a data sending device, a data receiving device and a monitoring display device, and the data sending device is connected with the data receiving device in a wireless mode; during the tunneling process, through cutter wear monitoring and wear inspection, when the wear loss of the side hob exceeds 10mm, the side hob needs to be replaced, and at the moment, normal pressure tool changing is carried out according to a normal pressure tool changing method; the normal pressure tool changing method comprises the following specific steps:
(1) preparation work: a. preparing a tool: 2 chain blocks, 24 ratchet wrenches, 1 ratchet wrench 30, 1 double offset ring spanner 24, 4U-shaped clamps and 2 sections of 1M steel wire ropes; b. before tool changing, the hob to be changed is well installed by a tool rest, well clamped by a steel wire rope and a U-shaped clamp, the hob is placed according to the position where the hob is to be installed, and the changeable cutting hobs are divided into three types according to different lengths, wherein each type corresponds to a tool changing portal frame with different lengths;
(2) tool changing flow: the cutter is divided into three types according to different lengths: a 930mm long knife 69, 1090mm long knife 6, 1005mm long knife 5; a. after the tool and the portal frame are transported into the cutter head, the portal frame is installed, one side of the opening at the side edge of the portal frame is installed on the outer side, and a pressure gauge is installed; b. removing the safety bolt on the cutter holder; c. pulling out the cutter backwards; d. closing the next gate and closing the previous gate; both the two gates need to be closed to be within the red scale lines, if the gates leak, the gate bolts are fastened to be 50 N.M, and then the gates are opened and closed for several times to see whether the gates leak or not; e. watching whether the reading of the pressure gauge is 0, if not, opening the ball valve, and closing the ball valve after the pressure is removed to ensure that the reading of the pressure gauge is 0; f. the bolt of the cutter base is removed, and the cutter is sent out of the cutter head; g. after a new cutter is fed in, the cutter is roughly fixed by a positioning pin, and a cutter head base bolt is installed; h. opening the previous gate, then opening the next gate, and flushing the two gates by using a flushing valve before opening the gates; i. pushing the cutter forward; j. installing a safety bolt; k. and (4) dismantling the portal frame, conveying the portal frame and the tool out, and finishing tool changing.
2. The method for changing the cutter under the normal pressure as claimed in claim 1, wherein the soil around the cutter head and the shield body is frozen before changing the cutter under the normal pressure, and the method comprises the following steps: (1) determining the range of the soil body to be frozen around the cutter head and the shield body according to the actual condition of the soil layer, (2) drilling downwards on the corresponding ground by adopting a drilling machine after determining the range of the soil body to be frozen, wherein the number of the drilled holes is determined according to the range, the water content and the compactness of the soil body to be frozen; (3) filling a coolant liquid nitrogen into each drill hole to freeze the soil body in the corresponding range, and (4) continuously operating the slurry circulation system until the impurities in the slurry bin are emptied, and controlling the temperature in the slurry bin to be below 0 ℃ by utilizing the freezing function in the shield tunneling machine.
3. The method for changing the tool under the normal pressure according to claim 2, wherein the drilling machine is a full-circle casing drilling machine, and the refrigerant is liquid nitrogen or liquid carbon dioxide.
4. A method of changing tools at atmospheric pressure as claimed in claim 1, wherein: the cutter is a double-shaft double-edge normal pressure cutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911330540.5A CN110939453B (en) | 2019-12-20 | 2019-12-20 | Cutter real-time monitoring system and normal-pressure cutter changing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911330540.5A CN110939453B (en) | 2019-12-20 | 2019-12-20 | Cutter real-time monitoring system and normal-pressure cutter changing method |
Publications (2)
| Publication Number | Publication Date |
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| CN110939453A CN110939453A (en) | 2020-03-31 |
| CN110939453B true CN110939453B (en) | 2021-01-29 |
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| CN201911330540.5A Active CN110939453B (en) | 2019-12-20 | 2019-12-20 | Cutter real-time monitoring system and normal-pressure cutter changing method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033659B (en) * | 2020-09-04 | 2021-12-28 | 盾构及掘进技术国家重点实验室 | Management system and method for shield machine cutter |
| CN114294000B (en) * | 2021-12-31 | 2024-01-26 | 广州轨道交通建设监理有限公司 | Method and equipment for replacing hob of shield machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007169967A (en) * | 2005-12-20 | 2007-07-05 | Kajima Corp | Ground freezing method and freezing device |
| CN204609889U (en) * | 2015-04-27 | 2015-09-02 | 海南大学 | A kind of shield tunnel termination vertical cup type consolidation by freezing structure |
| CN105298505A (en) * | 2015-11-16 | 2016-02-03 | 中国铁建重工集团有限公司 | Earth pressure balance shield machine with freezing function and tool change method thereof |
| CN106592573A (en) * | 2016-12-23 | 2017-04-26 | 北京科技大学 | Freezer-free liquid nitrogen artificial ground freezing method |
| CN207636123U (en) * | 2017-12-25 | 2018-07-20 | 中铁工程装备集团有限公司 | Cutter real-time monitoring system for normal pressure tool changing |
| CN110159274A (en) * | 2019-06-19 | 2019-08-23 | 中铁第六勘察设计院集团有限公司 | A kind of high hydraulic pressure shield tunnel emergency tool-changing mechanism in sea area and construction method |
-
2019
- 2019-12-20 CN CN201911330540.5A patent/CN110939453B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007169967A (en) * | 2005-12-20 | 2007-07-05 | Kajima Corp | Ground freezing method and freezing device |
| CN204609889U (en) * | 2015-04-27 | 2015-09-02 | 海南大学 | A kind of shield tunnel termination vertical cup type consolidation by freezing structure |
| CN105298505A (en) * | 2015-11-16 | 2016-02-03 | 中国铁建重工集团有限公司 | Earth pressure balance shield machine with freezing function and tool change method thereof |
| CN106592573A (en) * | 2016-12-23 | 2017-04-26 | 北京科技大学 | Freezer-free liquid nitrogen artificial ground freezing method |
| CN207636123U (en) * | 2017-12-25 | 2018-07-20 | 中铁工程装备集团有限公司 | Cutter real-time monitoring system for normal pressure tool changing |
| CN110159274A (en) * | 2019-06-19 | 2019-08-23 | 中铁第六勘察设计院集团有限公司 | A kind of high hydraulic pressure shield tunnel emergency tool-changing mechanism in sea area and construction method |
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| CN110939453A (en) | 2020-03-31 |
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