CN210127851U - Simulation test device for simulating excavation construction of multiple shield tunnels - Google Patents
Simulation test device for simulating excavation construction of multiple shield tunnels Download PDFInfo
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- CN210127851U CN210127851U CN201920744867.6U CN201920744867U CN210127851U CN 210127851 U CN210127851 U CN 210127851U CN 201920744867 U CN201920744867 U CN 201920744867U CN 210127851 U CN210127851 U CN 210127851U
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Abstract
The utility model discloses a simulation test device for simulating excavation construction of a plurality of shield tunnels, which comprises a box body, wherein a plurality of hydraulic cylinders and a plurality of bearing cylinders which are horizontally arranged are arranged outside the box body, a plurality of inner supporting cylinders are arranged in the box body, the hydraulic cylinders, the inner supporting cylinders and the bearing cylinders are coaxially arranged in a one-to-one correspondence manner, sleeves which are in sliding fit with the inner supporting cylinders are arranged outside the inner supporting cylinders, the front end plate of the sleeve penetrating through the box body is inserted in the bearing cylinders, and the sleeves are driven by the hydraulic cylinders; an observation window is arranged on the bearing cylinder. The utility model discloses a section of jurisdiction lining of interior section of thick bamboo simulation shield tunnel adopts the outside space of section of thick bamboo lining among the actual work progress of sleeve simulation, and interior section of thick bamboo and sleeve are the sliding fit structure, and it is ejecting with the sleeve to adopt the hydro-cylinder, and the annular space that produces because of the sleeve impels can arouse sinking of the upper portion soil body to this simulation that realizes tunnel work progress is close more with the actual engineering condition, and the simulation result is more accurate reliable.
Description
Technical Field
The utility model relates to a simulation test device, especially a simulation test device for simulating many shield tunnels excavation constructions.
Background
In a large number of crossing projects, existing line crossing projects under construction by a shield method are the most common. The shield method is a method for carrying out tunnel underground excavation construction by using a shield machine, and has incomparable advantages of small influence on the surrounding environment, high construction speed, high quality, high efficiency, low labor intensity, safety, environmental protection and the like, so the shield method becomes a main construction method in the construction of subways of various major cities and large municipal pipelines at present. When a newly-built tunnel passes through an existing tunnel at a short distance, particularly when the excavation surface of the newly-built tunnel is pushed near the existing tunnel, the newly-built tunnel inevitably causes the built tunnel to be sunk. If the excavation face is unstable, the existing tunnel is greatly damaged, and the normal use function of the tunnel is influenced. However, the rail transit facilities have strict requirements on deformation control, and the main problem generated by the construction of the existing tunnel passing through the tunnel is the influence of the construction of a newly-built tunnel on the existing tunnel, and how to enable the newly-built tunnel to smoothly pass through the existing tunnel and enable the built tunnel to be in a safe and controllable state is always a difficult problem. The newly-built tunnel generates disturbance to the soil body to form deformation, the disturbed surrounding rock deformation causes the change of external force and supporting conditions, and the existing tunnel generates settlement, inclination and section deformation, so that the existing tunnel generates longitudinal displacement, transverse deformation and additional internal force. Therefore, in the underpass project, particularly the underpass existing subway station and the interval tunnel project, the normal operation of the existing line is ensured to be the starting point and the basic target of the project construction, and the influence on the existing tunnel is minimized to be the optimal target of the project construction. The premise of realizing safe crossing is to fully know the deformation rule, stress and strain change rule of the existing tunnel caused by the construction of the newly built tunnel, so that effective construction measures are taken. Therefore, a set of simulation test device for excavation construction of a plurality of shield tunnels is urgently needed to be developed in the field of geotechnical centrifugal model tests, so that the influence of the construction of a newly-built tunnel on the existing tunnel or building is researched.
The existing simulation test device is provided with an annular water bag outside a lining model, the structure can cause uneven deformation or extrusion of the water bag in the drainage process, and the formed annular space is different in thickness and is inconsistent with the actual situation.
Disclosure of Invention
The utility model discloses a solve the technical problem that exists among the known art and provide a analogue test device that is used for simulating many shield tunnels excavation constructions in geotechnological centrifugal model test field, the device can simulate the actual engineering condition better.
The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be: a simulation test device for simulating excavation construction of a plurality of shield tunnels comprises a box body, wherein a plurality of hydraulic cylinders and a plurality of bearing cylinders which are horizontally arranged are arranged outside the box body, a plurality of inner supporting cylinders are arranged in the box body, the hydraulic cylinders, the inner supporting cylinders and the bearing cylinders are coaxially arranged in a one-to-one correspondence manner, the front ends of the hydraulic cylinders are fixed on a rear end plate of the box body, the rear ends of the bearing cylinders are fixed on a front end plate of the box body, sleeves which are in sliding fit with the inner supporting cylinders are arranged on the outer sides of the inner supporting cylinders, the sleeves penetrate through the front end plate of the box body and are inserted into the bearing cylinders, and the sleeves are driven by the hydraulic cylinders; and an observation window is arranged on the bearing cylinder.
On the basis of the above scheme, the utility model discloses following improvement has still been made:
and a displacement sensor fixing cross beam is arranged at the top of the box body.
The bearing cylinder is fixed on the front end plate of the box body through a bearing cylinder fixing plate, and the bearing cylinder, the front end plate and the box body are fixedly connected through a detachable connection structure; the hydraulic cylinder is fixed on the rear end plate of the box body through a hydraulic cylinder fixing plate, and the hydraulic cylinder, the rear end plate and the box body are fixedly connected through a detachable connection structure; the inner support cylinder is fixedly connected with the hydraulic cylinder fixing plate through a detachable connection structure.
The box body is provided with a detachable side plate.
A supporting component with adjustable height is arranged below the front end of the bearing cylinder.
And a supporting and positioning component is arranged below the rear end of the hydraulic cylinder.
The utility model has the advantages and positive effects that: adopt the inside stay section of thick bamboo to simulate the section of thick bamboo lining cutting of shield tunnel, adopt the outside space of section of thick bamboo lining cutting in the actual work progress of sleeve simulation, inside stay section of thick bamboo and sleeve are the sliding fit structure, adopt the hydro-cylinder ejecting with the sleeve, the annular space that produces because of the sleeve impels can arouse sinking of upper portion soil body to this simulation that realizes tunnel work progress is close more with the actual engineering condition, make tunnel shield simulate work progress accord with actual conditions more, the simulation result is more accurate reliable. The hydraulic power drive is adopted, so that the test working efficiency can be improved; simple structure, reliable performance and simple manufacture.
Drawings
FIG. 1 is a perspective view of the main structure of the present invention;
FIG. 2 is a plan view of the hydraulic cylinder, extension rod and sleeve of the present invention;
fig. 3 is a perspective view of the control valve of the present invention;
fig. 4 is an electrical schematic diagram of the control box of the present invention.
In the figure: 1. a box body; 2. a side plate; 3. a hydraulic cylinder; 4. an inner support cylinder; 5. a sleeve; 6. a bearing cylinder; 7. a supporting cylinder fixing plate; 8. a hydraulic cylinder fixing plate; 9. the displacement sensor fixes the crossbeam; 10. an extension pole; 11. a connecting nut; 12. and locking the nut.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified and will be described in detail with reference to the accompanying drawings:
referring to fig. 1 to 4, a simulation test device for simulating excavation construction of multiple shield tunnels comprises a box body 1, wherein a plurality of horizontally arranged hydraulic cylinders 3 and a plurality of supporting cylinders 6 are arranged outside the box body 1, a plurality of inner supporting cylinders 4 are arranged in the box body 1, the hydraulic cylinders 3, the inner supporting cylinders 4 and the supporting cylinders 6 are coaxially arranged in a one-to-one correspondence manner, the front ends of the hydraulic cylinders 3 are fixed on the rear end plate of the box body 1, the rear ends of the supporting cylinders 6 are fixed on the front end plate of the box body 1, sleeves 5 in sliding fit with the inner supporting cylinders 4 are arranged outside the inner supporting cylinders 4, the sleeves 5 penetrate through the front end plate of the box body 1 and are inserted into the supporting cylinders 6, the sleeves 5 are driven by the hydraulic cylinders, and the pushing speed of the hydraulic cylinders 3 can be realized by adjusting the pressure of hydraulic oil. An observation window is arranged on the bearing cylinder 6.
In this embodiment, the rod of the hydraulic cylinder is provided with an extension rod 10, the extension rod 10 is connected with the rod through a connecting nut 11, and the sleeve 5 is provided with a front end plate fixedly connected with the extension rod 10 through a locking nut 12. And a displacement sensor fixing cross beam 9 is arranged at the top of the box body 1. The bearing cylinder 6 is fixed on the front end plate of the box body 1 through a bearing cylinder fixing plate 7, and the bearing cylinder fixing plate, the bearing cylinder fixing plate and the box body are fixedly connected through a detachable connection structure; the hydraulic cylinder 3 is fixed on the rear end plate of the box body 1 through a hydraulic cylinder fixing plate 8, and the three parts are fixedly connected by adopting a detachable connection structure; the internal stay section of thick bamboo 4 with pneumatic cylinder fixed plate 8 adopts detachable connection structure to carry out fixed connection, and the excavation simulation in different interval tunnels can be realized through bearing section of thick bamboo fixed plate and the pneumatic cylinder fixed plate of installing different tunnel pitch-row to above-mentioned structure. The box body 1 is provided with a detachable side plate 2, so that the foundation model can be conveniently manufactured. A height-adjustable supporting component is arranged below the front end of the bearing cylinder 6, and more specifically, the supporting component can adopt a supporting rod and a height fine-adjustment nut so as to adjust the level of the bearing cylinder 6. A supporting and positioning part is arranged below the rear end of the hydraulic cylinder 3, more specifically, in this embodiment, the supporting and positioning part is a positioning plate shared by all the hydraulic cylinders 3, the positioning plate is supported at the rear end of the hydraulic cylinder 3, and a convex block is arranged at the lower part of the positioning plate and embedded in a groove of a supporting plate at the rear side of the box body.
In the present embodiment, the hydraulic cylinder 3 is a MOB50x 400. The box body is formed by welding steel plates with the thickness of 20 mm. The sleeve 5 is made of stainless steel, and the wall thickness is 1 mm.
Please refer to fig. 3 and 4, fig. 3 is a perspective view of the control valve of the present invention, the lower part of the valve body is an oil path block, the oil path block is provided with an external thread joint connected with the hydraulic power source and the oil cylinder, the upper part of the oil path block is provided with a throttle valve and an overflow valve, the upper part of the throttle valve is provided with a solenoid valve, the leads of the throttle valve, the overflow valve and the solenoid valve are connected into the control box through the electric slip ring of the geotechnical centrifuge, and the control box is composed of a transformer, a PLC controller, a dc relay, a control switch and a display lamp.
The utility model discloses a theory of operation:
before the test is started, all hydraulic cylinders 3 are in a contraction state, the sleeves 5 are located inside the box body 1 at the moment, side plates on two sides of the box body 1 are installed, a soil foundation model is manufactured inside the box body 1, a button of the control box corresponding to the hydraulic cylinders is pressed, cylinder rods of the hydraulic cylinders 3 are ejected out, the sleeves 5 on the outer sides of the inner supporting cylinders 4 are driven at the same time, the sleeves 5 are ejected into bearing cylinders 6 on the front portion of the box body, the advancing distance of the sleeves 5 is observed through observation windows on the bearing cylinders 6, and therefore the excavation of a tunnel is completed. According to different specific tests, different construction sequences are simulated by setting programs. Excavation simulation of tunnels with different intervals is realized by mounting bearing cylinder fixing plates and hydraulic cylinder fixing plates with different tunnel hole intervals. The device has the characteristics of reality and flexible change of the construction sequence and the tunnel spacing in the process of simulating the tunnel excavation.
Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is within the scope of the present invention.
Claims (6)
1. A simulation test device for simulating excavation construction of a plurality of shield tunnels is characterized by comprising a box body, wherein a plurality of hydraulic cylinders and a plurality of bearing cylinders which are horizontally arranged are arranged outside the box body, a plurality of inner supporting cylinders are arranged in the box body, the hydraulic cylinders, the inner supporting cylinders and the bearing cylinders are coaxially arranged in a one-to-one correspondence manner, the front ends of the hydraulic cylinders are fixed on a rear end plate of the box body, the rear ends of the bearing cylinders are fixed on a front end plate of the box body, sleeves which are in sliding fit with the inner supporting cylinders are arranged on the outer sides of the inner supporting cylinders, the sleeves penetrate through the front end plate of the box body and are inserted into the bearing cylinders, and the sleeves are driven by the hydraulic cylinders; and an observation window is arranged on the bearing cylinder.
2. The simulation test device for simulating the excavation construction of a plurality of shield tunnels according to claim 1, wherein a displacement sensor fixing beam is installed at the top of the box body.
3. The simulation test device for simulating the excavation construction of a plurality of shield tunnels according to claim 1, wherein the bearing cylinder is fixed on a front end plate of the box body through a bearing cylinder fixing plate, and the bearing cylinder, the front end plate and the box body are fixedly connected through a detachable connection structure; the hydraulic cylinder is fixed on the rear end plate of the box body through a hydraulic cylinder fixing plate, and the hydraulic cylinder, the rear end plate and the box body are fixedly connected through a detachable connection structure; the internal support cylinder and the hydraulic cylinder fixing plate are fixedly connected by adopting a detachable connection structure.
4. The simulation test apparatus for simulating multiple shield tunnel excavation construction of claim 1, wherein the box body is provided with detachable side plates.
5. The simulation test apparatus for simulating the excavation construction of a plurality of shield tunnels according to claim 1, wherein a support member with adjustable height is provided below a front end of the bearing cylinder.
6. The simulation test apparatus for simulating the excavation of a plurality of shield tunnels according to claim 1, wherein a support positioning member is provided below a rear end of the hydraulic cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920744867.6U CN210127851U (en) | 2019-05-22 | 2019-05-22 | Simulation test device for simulating excavation construction of multiple shield tunnels |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920744867.6U CN210127851U (en) | 2019-05-22 | 2019-05-22 | Simulation test device for simulating excavation construction of multiple shield tunnels |
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| CN210127851U true CN210127851U (en) | 2020-03-06 |
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| CN201920744867.6U Active CN210127851U (en) | 2019-05-22 | 2019-05-22 | Simulation test device for simulating excavation construction of multiple shield tunnels |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989761A (en) * | 2019-05-22 | 2019-07-09 | 安徽省交通勘察设计院有限公司 | A kind of simulation test device constructed for simulating a plurality of Shield Tunneling |
| CN113341109A (en) * | 2021-06-30 | 2021-09-03 | 大连海事大学 | Tunnel grouting reinforcement, lifting and excavation overall process simulation device and simulation method |
| CN114019134A (en) * | 2021-08-23 | 2022-02-08 | 长安大学 | Combined type shield tunnel wall back grouting simulation device and test method |
-
2019
- 2019-05-22 CN CN201920744867.6U patent/CN210127851U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989761A (en) * | 2019-05-22 | 2019-07-09 | 安徽省交通勘察设计院有限公司 | A kind of simulation test device constructed for simulating a plurality of Shield Tunneling |
| CN113341109A (en) * | 2021-06-30 | 2021-09-03 | 大连海事大学 | Tunnel grouting reinforcement, lifting and excavation overall process simulation device and simulation method |
| CN114019134A (en) * | 2021-08-23 | 2022-02-08 | 长安大学 | Combined type shield tunnel wall back grouting simulation device and test method |
| CN114019134B (en) * | 2021-08-23 | 2023-05-05 | 长安大学 | Combined type shield tunnel wall back grouting simulation device and test method |
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