CN114483070A - Model device capable of simulating shield tunnel construction on centrifugal machine - Google Patents
Model device capable of simulating shield tunnel construction on centrifugal machine Download PDFInfo
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- CN114483070A CN114483070A CN202210110955.7A CN202210110955A CN114483070A CN 114483070 A CN114483070 A CN 114483070A CN 202210110955 A CN202210110955 A CN 202210110955A CN 114483070 A CN114483070 A CN 114483070A
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- 238000010276 construction Methods 0.000 title claims abstract description 18
- 239000002689 soil Substances 0.000 claims abstract description 58
- 238000009412 basement excavation Methods 0.000 claims abstract description 36
- 238000005192 partition Methods 0.000 claims abstract description 36
- 230000005540 biological transmission Effects 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims abstract description 16
- 230000005641 tunneling Effects 0.000 claims abstract description 16
- 238000007599 discharging Methods 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 9
- 238000004088 simulation Methods 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 5
- 238000013459 approach Methods 0.000 claims description 2
- 238000009415 formwork Methods 0.000 claims 4
- 238000004181 pedogenesis Methods 0.000 claims 1
- 239000004927 clay Substances 0.000 abstract description 19
- 230000001133 acceleration Effects 0.000 abstract description 7
- 238000011160 research Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 11
- 238000013461 design Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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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
-
- 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
-
- 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
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
- E21D9/124—Helical conveying means therefor
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a model device capable of simulating shield tunnel construction on a centrifugal machine, which comprises a frame and a model shield machine, wherein a model box is arranged at the front end of the frame, a hole is formed in the rear side wall of the model box, a vertical partition plate is arranged at the rear part of the frame, the model shield machine comprises a shield shell and a model tunnel lining, and a shield cutting, pushing and deslagging system is arranged; the shield cutting motor provides torque, and the cutter head is driven to rotate through the transmission shaft, so that the model shield machine excavates the soil body in the model box; the propelling speed of the model shield tunneling machine is controlled by the shield pushing system, the rotating speeds of the cutter head and the muck conveyor are controlled by the shield cutting system, a soil body to be cut is positioned in the soil bin, and muck is discharged out of the model shield tunneling machine by the muck discharging system. The device aims at guaranteeing that the excavation process of the shield tunnel in the clay can be smoothly simulated under the acceleration condition of the centrifugal machine, is better than a liquid discharge method which is commonly used in the past, and realizes the experimental research of the tunnel excavation centrifugal machine in a more refined clay stratum.
Description
Technical Field
The invention belongs to the technical field of shield construction, and particularly relates to a shield tunnel excavation device.
Background
With the increasing demand for traffic in today's society, people have shifted the emphasis to the development and utilization of urban underground spaces, where tunnels account for a major proportion. Due to the construction of subway tunnels, underground pipe galleries and the like, the construction environment of the subway tunnels is gradually crowded, the visual field of people is gradually faded out by a single-line tunnel, and a double-line or even multi-line proximity shield tunnel becomes a main design scheme for the construction of the subway tunnels at present. However, since the distance between adjacent tunnels is small, the mutual influence between the tunnels cannot be ignored, which may cause immeasurable ground subsidence, cause damage to ground buildings and structures, and even may face the risk of cracking and collapsing. In addition, the subway tunnel construction in Tianjin is mostly carried out in clay stratum, and the clay has the characteristics of high compressibility and lower soil body strength, and is easier to cause larger surface subsidence compared with sandy soil stratum. Therefore, it is necessary to develop a centrifugal machine test research aiming at the interaction mechanism of the adjacent tunnel construction, and aim to search a corresponding surface subsidence control measure through the mechanism research. One set of shield tunnel excavation device of needs design can satisfy the tunnelling excavation in the clay, can guarantee the device feasibility under centrifuge acceleration condition again. Nomoto (1999) and the like develop a shield excavation centrifuge test applicable to dry sand, the model shield machine can well simulate the shield excavation process in a dry sand stratum, but in a clay stratum, the problems of water leakage at the opening of a tunnel and great excavation difficulty of the clay stratum are not solved. Chapman (2007) and other people develop small shield equipment suitable for clay formations, but the equipment is simple, has a large difference with a real shield machine, and improves the muck without considering the unfavorable condition of excavation. The device is an over-complex device which can simplify the action of the device as much as possible while simulating a real shield machine, such as an earth pressure balance shield model test system which is developed by Beijing university of industry (2018) and can realize the monitoring function of the cutter head and lining pressure. Therefore, it is necessary to design a shield tunnel excavation device which can normally work under the condition of acceleration of a centrifugal machine and simulate the actual shield tunneling process in a clay stratum.
Disclosure of Invention
Aiming at the prior art, the invention provides a model device capable of simulating shield tunnel construction on a centrifugal machine, which can realize tunnel tunneling in clay under the gravity acceleration of the centrifugal machine.
In order to solve the technical problems, the model device capable of simulating shield tunnel construction on a centrifugal machine comprises a frame and a model shield machine, wherein a model box is arranged at the front end of the frame, an opening is formed in the rear side wall of the model box, a vertical partition plate is arranged at the rear part of the frame, the model shield machine comprises a shield shell and a model tunnel lining which are coaxially arranged, and the tail part of the model tunnel lining is connected with the partition plate through bolts; a shield cutting system and a slag discharging system are arranged in the shield shell and the model tunnel lining; a shield pushing system is arranged at the bottom of the frame; the shield cutting system comprises a shield cutting motor, a transmission shaft and a cutter head, the shield cutting motor is fixed on the partition plate, one end of the transmission shaft is connected with the output end of the shield cutting motor, the other end of the transmission shaft is connected to the front end of the model tunnel lining, and the cutter head is installed at the other end of the transmission shaft; the shield cutting motor provides torque, and the cutter head is driven to rotate through the transmission shaft, so that the model shield machine can excavate soil in the model box; the shield pushing system comprises a shield pushing motor and a pushing lead screw; the shield pushing motor is installed at the bottom of the rear end of the frame, the jacking screw rod is arranged at the bottom of the frame, one end of the jacking screw rod is connected with the output end of the shield pushing motor, the other end of the jacking screw rod is connected to the rear side wall of the model box, the partition plate is in threaded connection with the jacking screw rod, the output end of the shield pushing motor drives the jacking screw rod to rotate through a transmission mechanism, the jacking screw rod drives the partition plate to move back and forth, and tunneling of the model shield machine in the excavation process of soil in the model box is achieved; the slag discharging system comprises a spiral conveyor fixed on the transmission shaft and a slag discharging port arranged at the bottom end of the tail part of the model tunnel lining; the space between the cutter disc and the model tunnel lining forms a soil bin, the spiral conveyor stretches into the soil bin, and when the transmission shaft rotates, soil bodies cut by the cutter disc are conveyed into the spiral conveyor and discharged through the residue soil discharge port.
Further, the model apparatus of the present invention, wherein:
the shield pushing system further comprises a guide rail arranged at the bottom of the frame, the guide rail is parallel to the jacking lead screw, and the guide rail is as long as the jacking lead screw; the partition board is matched with the guide rail through a shaft hole.
An additional opening for fixing the model shield machine is reserved on the partition plate; and when the excavation of one shield tunnel is finished, separating the model tunnel lining from the partition plate, and reinstalling another model shield machine at another opening reserved on the partition plate to realize the simulation of the continuous excavation of the approach tunnel.
The selection of the cutter head and the cutter assembly is designed according to the type of soil.
For the shield tunnel excavation in the clay, the cutter assembly comprises a leading cutter, a cutting cutter and a fishtail center cutter, the cutter is a spoke type cutter, the leading cutter and the cutting cutter are arranged on the spoke, and the fishtail center cutter is arranged in the center of the cutter; and installing a fishtail center knife. For the shield tunnel excavation in the soft soil stratum with better uniformity, the cutter head opening rate is 40-75%.
A soil pressure sensor is arranged on the cutter head to monitor the soil pressure in front of the cutter head; the soil pressure sensor is a wireless sensor.
The shield shell and the model tunnel lining are concentric circles with different section sizes, and the diameter of the model tunnel lining is smaller than that of the shield shell.
And a sealing ring is arranged at the opening of the rear side wall of the model box, and the inner diameter of the sealing ring is sealed with the outer diameter of the model tunnel lining.
Compared with the prior art, the invention has the beneficial effects that:
(1) the model shield tunneling machine can simulate the shield tunneling process of a clay stratum with high excavation difficulty;
(2) the model shield machine is convenient to mount and dismount, and is suitable for simulating the tunneling of a close-connection continuous shield tunnel in a clay stratum;
(3) the model test device well solves the problems of soil leakage and water leakage which possibly occur in the excavation process, and ensures the accuracy of the centrifuge test.
Drawings
FIG. 1 is a schematic axial cross-sectional view of a mold apparatus according to the present invention;
FIG. 2 is a schematic view of the construction of the cutter head of the model apparatus according to the present invention;
in the figure:
1-cutter head 2-transmission shaft 3-shield cutting motor 4-clapboard
5-jacking screw 6-guide rail 7-shield jacking motor 8-screw conveyer
9-muck discharge port 10-model tunnel lining 11-soil pressure sensor 12-shield shell
13-advanced knife 14-cutting knife 15-fish tail center knife 16-hole opening
17-model box 18-sealing ring
Detailed Description
The design concept of the model device capable of simulating shield tunnel construction on the centrifuge is as follows: simulating shield excavation in an actual soft soil stratum, controlling the propelling speed of the model shield tunneling machine through a shield pushing system, controlling the rotating speeds of a cutter head and a spiral conveyor through a shield cutting system, arranging a soil body to be cut in a soil bin, and discharging residue soil out of the model shield tunneling machine through a residue discharging system. The centrifugal machine can better reflect the response of the surrounding soil body under the acceleration condition, but the stress level of the soil body is improved in multiples, the difficulty of shield excavation in the centrifugal machine is greatly increased, the device aims to ensure that the excavation process of a shield tunnel in clay can be smoothly simulated under the acceleration condition of the centrifugal machine, the device is better than a liquid discharge method which is generally used in the past, and the more refined centrifugal machine test research of tunnel excavation in a clay stratum is realized.
The invention will be further described with reference to the following figures and specific examples, which are not intended to limit the invention in any way.
As shown in fig. 1, the model device capable of simulating shield tunnel construction on a centrifuge according to the present invention includes a frame and a model shield machine, wherein a model box 17 is disposed at a front end of the frame, an opening 16 is disposed on a rear sidewall of the model box 17, a vertical partition plate 4 is disposed at a rear portion of the frame, the model shield machine includes a shield shell 12 and a model tunnel lining 10 which are coaxially disposed, and a bolt is used for connecting a tail portion of the model tunnel lining 10 with the partition plate 4; a shield cutting system and a slag discharging system are arranged in the shield shell 12 and the model tunnel lining 10; and a shield pushing system is arranged at the bottom of the frame.
The shield cutting system comprises a shield cutting motor 3, a transmission shaft 2 and a cutter head 2, wherein the shield cutting motor 3 is fixed on the partition plate 4, one end of the transmission shaft 2 is connected with the output end of the shield cutting motor 3, the other end of the transmission shaft 2 is connected to the front end of the model tunnel lining 10, and the cutter head 2 is installed at the other end of the transmission shaft 2; the shield cutting motor 3 provides torque, and the cutter head 1 is driven to rotate through the transmission shaft 2, so that the model shield machine can excavate soil in the model box 17;
the shield pushing system comprises a shield pushing motor 7 and a pushing lead screw 5; the shield pushing motor 7 is installed at the bottom of the rear end of the frame, the jacking screw 5 is arranged at the bottom of the frame, one end of the jacking screw 5 is connected with the output end of the shield pushing motor 7, the other end of the jacking screw 5 reaches the rear side wall of the model box 17, the partition plate 4 is in threaded connection with the jacking screw 5, the output end of the shield pushing motor 7 drives the jacking screw 5 to rotate through a transmission mechanism, the jacking screw 5 drives the partition plate 4 to move back and forth, and tunneling of the model shield machine in the process of excavating soil in the model box 17 is realized; the shield pushing system further comprises a guide rail 6 arranged at the bottom of the frame, the guide rail 6 is parallel to the jacking lead screw 5, and the guide rail 6 is as long as the jacking lead screw 5; the partition plate 4 is matched with the guide rail 6 through a shaft hole. The guide rail 6 connected with the partition plate 4 is parallel to the jacking lead screw 5, and the jacking lead screw 5 and the guide rail 6 jointly control the partition plate 4 not to deviate in the advancing or retreating process, so that the direction accuracy of the model shield tunneling machine in the excavation process is ensured.
The slag discharging system comprises a spiral conveyor 8 fixed on the transmission shaft 2 and a slag discharging port 9 arranged at the bottom end of the tail part of the model tunnel lining 10; in the invention, the cutter head 1 and the spiral conveyor 8 are both fixed on the same transmission shaft 2 and controlled by the shield cutting motor 3, so that the rotating speeds of the cutter head 1 and the spiral conveyor are kept consistent all the time. The space between the cutter head 1 and the model tunnel lining 10 forms a soil bin, the spiral conveyor 8 extends into the soil bin, soil bodies cut by the cutter head 1 are conveyed into the spiral conveyor 8 while the transmission shaft 2 rotates, and the soil bodies are discharged out of the model shield machine through the residue soil discharge port 9.
In the invention, the tail part of the model shield machine (namely the model tunnel lining 10) is fixed on a partition plate 4 by bolts, and an additional opening for fixing the model shield machine can be reserved on the partition plate 4; the method aims to realize the simulation of the continuous excavation of the proximity tunnel by separating the model shield machine (the model tunnel lining 10) from the partition plate 4 at the tail part and reinstalling another model shield machine at another opening reserved on the partition plate 4 when the excavation of one shield tunnel is finished.
The selection of the cutter head 1 and the cutter components is designed according to the soil body type. For the shield tunnel excavation in clay, the cutter assembly comprises a leading cutter 13, a cutting cutter 14 and a fishtail center cutter 15, the cutter 1 is a spoke cutter, the leading cutter 13 and the cutting cutter 14 are mounted on spokes, and the fishtail center cutter 15 is mounted in the center of the cutter 1; the fishtail center knife 15 is installed as shown in fig. 2. For the shield tunnel excavation in soft soil stratum with better homogeneity such as clay, the adaptability of the cutter head 1 and the stratum is considered, a larger cutter head opening rate is selected, and the cutter head opening rate is recommended to be 40% -75%. The shield tunnel excavation in the clay is all favorable to the selection of great aperture opening ratio and above-mentioned cutter.
A soil pressure sensor 11 is arranged on the cutter head 1 to monitor the soil pressure in front of the cutter head; the soil pressure sensor 11 adopts a wireless sensor, and the sensor lead is prevented from being damaged due to the rotation of the cutter head (1), so that the soil pressure sensor 11 fails.
The shield shell 12 and the model tunnel lining 10 are concentric circles with different section sizes, the diameter of the model tunnel lining 10 is slightly smaller than that of the shield shell 12, the purpose is to simulate soil loss in the shield tunneling process in a design mode of reducing the size, and the design is more in line with the alternating operation of soil excavation and lining construction in the actual engineering.
A sealing ring 18 is arranged at an opening 16 of the rear side wall of the model box 17 for sealing, and the inner diameter of the sealing ring 18 is sealed with the outer diameter of the model tunnel lining 10, so that the phenomenon that soil in the model box 17 leaks from the opening 16 in the excavation process of the model shield machine due to the fact that the diameter of the model tunnel lining 10 is reduced is avoided.
When the simulation device disclosed by the invention is used for testing, the bottom of the frame of the simulation device shown in figure 1 is tightly connected and fixed with a basket of a centrifugal machine through bolts, so that the device is prevented from falling off in the acceleration process of the centrifugal machine. During the centrifugal machine test, due to the action of centrifugal force, the simulation device rotates 90 degrees clockwise (anticlockwise) from the initial vertical state shown in figure 1, and meanwhile, the simulation device is subjected to inertia force in the horizontal direction, so that the stratum stress level of the actual shield tunnel construction is simulated.
The model device can realize the simulation of the shield tunnel construction on the centrifuge, and the simulation test is as follows:
firstly, a bolt for a model shield machine is arranged on a partition plate 4, a transmission shaft 2 is connected with a shield cutting motor 3, after all parts are checked to work normally, a shield pushing motor 7 is started, and when a cutter head 1 contacts with soil in a model box 17, a centrifuge test is started. And starting the centrifugal machine and gradually accelerating to a preset rotating speed to enable the clay to reach a stress level consistent with the actual stratum through drainage consolidation.
Keeping the rotating speed of the centrifuge fixed, and simultaneously starting the shield pushing motor 7 and the shield cutting motor 3. The shield incremental launching motor 7 drives the model shield machine fixed with the partition plate 4 to tunnel forwards at a constant speed through the incremental launching screw 5, the shield cutting motor 3 drives the cutter head 1 to rotate and cut soil, the cut soil enters a soil bin formed between the cutter head 1 and the model tunnel lining 10, and the soil is discharged out of the model shield machine through a muck discharge port 9 by the spiral conveyor 8. In the excavation process, soil pressure sensors 11 on the cutter head 1 and in the soil bin are connected with an external data acquisition device, and the soil pressure values in the front of the cutter head 1 and in the soil bin are monitored in real time. And adjusting the shield tunneling speed and the rotating speed of the cutter head 1 through the shield pushing motor 7 and the shield cutting motor 3 according to the displayed soil pressure value, and keeping the soil pressure balance of the model shield tunneling machine until the shield tunnel excavation is finished.
If the continuous excavation model test of the adjacent tunnel is carried out, after the first tunnel is excavated, the bolts connecting the tail part of the model shield machine (the model tunnel lining 10) and the partition plate 4 are disassembled to be separated from the partition plate 4, the tail part of the other model shield machine is arranged at other reserved holes on the partition plate 4, and the process is repeated.
While the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are intended to be illustrative rather than restrictive, and many changes may be made by one skilled in the art in light of the above teachings without departing from the spirit of the present invention and these are intended to be within the scope of the present invention.
Claims (9)
1. The utility model provides a can simulate shield tunnel construction's model device on centrifuge, includes frame and model shield constructs the machine the front end of frame is equipped with mold box (17), be equipped with trompil (16), its characterized in that on the back lateral wall of mold box (17):
a vertical partition plate (4) is arranged at the rear part of the frame, the model shield machine comprises a shield shell (12) and a model tunnel lining (10) which are coaxially arranged, and the tail part of the model tunnel lining (10) is connected with the partition plate (4) by bolts; a shield cutting system and a slag discharging system are arranged in the shield shell (12) and the model tunnel lining (10); a shield pushing system is arranged at the bottom of the frame;
the shield cutting system comprises a shield cutting motor (3), a transmission shaft (2) and a cutter head (2), the shield cutting motor (3) is fixed on the partition plate (4), one end of the transmission shaft (2) is connected with the output end of the shield cutting motor (3), the other end of the transmission shaft (2) is connected to the front end of the model tunnel lining (10), and the cutter head (2) is installed at the other end of the transmission shaft (2); the shield cutting motor (3) provides torque, the cutter head (1) is driven to rotate through the transmission shaft (2), and the model shield machine excavates soil in the model box (17);
the shield pushing system comprises a shield pushing motor (7) and a pushing lead screw (5); the shield pushing motor (7) is installed at the bottom of the rear end of the frame, the jacking screw rod (5) is arranged at the bottom of the frame, one end of the jacking screw rod (5) is connected with the output end of the shield pushing motor (7), the other end of the jacking screw rod (5) is connected to the rear side wall of the model box (17), the partition plate (4) is in threaded connection with the jacking screw rod (5), the output end of the shield pushing motor (7) drives the jacking screw rod (5) to rotate through a transmission mechanism, the jacking screw rod (5) drives the partition plate (4) to move back and forth, and tunneling of the model shield machine in the excavation process of soil in the model box (17) is achieved;
the slag discharging system comprises a spiral conveyor (8) fixed on the transmission shaft (2) and a slag discharging port (9) arranged at the bottom end of the tail part of the model tunnel lining (10); cutterhead (1) with space between model tunnel lining (10) constitutes the soil storehouse, screw conveyer (8) stretch into in the soil storehouse transmission shaft (2) are rotatory in, will the soil body after cutterhead (1) cutting is sent into screw conveyer (8), and passes through dregs discharge port (9) are discharged.
2. The model device according to claim 1, wherein the shield thrusting system further comprises a guide rail (6) arranged at the bottom of the frame, the guide rail (6) is parallel to the jacking screw (5), and the guide rail (6) is as long as the jacking screw (5); the partition plate (4) is matched with the guide rail (6) through shaft holes.
3. Mould arrangement according to claim 1, characterized in that a further opening for fixing a mould shield machine is reserved in the partition (4); when the excavation of one shield tunnel is finished, the model tunnel lining (10) is separated from the partition plate (4), and another model shield machine is reinstalled at another opening reserved on the partition plate (4), so that the simulation of the continuous excavation of the approach tunnel is realized.
4. The formwork arrangement according to claim 1, characterized in that the selection of the cutterhead (1) and the cutter assembly is designed according to the soil type.
5. The mould arrangement according to claim 4, characterized in that said cutter assembly comprises a leading cutter (13), a cutting cutter (14) and a fishtail centering cutter (15), said cutter (1) being a spoked cutter, said leading cutter (13) and cutting cutter (14) being mounted on said spokes, said fishtail centering cutter (15) being mounted in the center of said cutter (1); a fishtail center knife (15) is installed.
6. The model arrangement of claim 5, wherein the cutter head opening ratio is 40-75% for shield tunnel excavation in soft soil formations of better uniformity.
7. Mould arrangement according to claim 1, characterized in that an earth pressure sensor (11) is arranged on the cutterhead (1) to monitor the earth pressure in front of the cutterhead; the soil pressure sensor (11) is a wireless sensor.
8. A former arrangement according to claim 1, characterised in that the shield shell (12) and the former tunnel lining (10) are concentric circles of unequal cross-sectional dimensions, the diameter of the former tunnel lining (10) being smaller than the diameter of the shield shell (12).
9. Formwork arrangement according to claim 1, characterized in that at the opening (16) of the rear side wall of the formwork box (17) a sealing ring (18) is provided, the inner diameter of the sealing ring (18) sealing against the outer diameter of the formwork tunnel lining (10).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210110955.7A CN114483070A (en) | 2022-01-29 | 2022-01-29 | Model device capable of simulating shield tunnel construction on centrifugal machine |
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| CN202210110955.7A CN114483070A (en) | 2022-01-29 | 2022-01-29 | Model device capable of simulating shield tunnel construction on centrifugal machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117072186A (en) * | 2023-10-18 | 2023-11-17 | 东北大学 | Arch tunnel excavation device for three-dimensional geological model test |
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2022
- 2022-01-29 CN CN202210110955.7A patent/CN114483070A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117072186A (en) * | 2023-10-18 | 2023-11-17 | 东北大学 | Arch tunnel excavation device for three-dimensional geological model test |
| CN117072186B (en) * | 2023-10-18 | 2024-01-02 | 东北大学 | Arch tunnel excavation device for three-dimensional geological model test |
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