CN216285260U - Large longitudinal slope pipe-jacking tunneling model test device - Google Patents
Large longitudinal slope pipe-jacking tunneling model test device Download PDFInfo
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- CN216285260U CN216285260U CN202120929875.5U CN202120929875U CN216285260U CN 216285260 U CN216285260 U CN 216285260U CN 202120929875 U CN202120929875 U CN 202120929875U CN 216285260 U CN216285260 U CN 216285260U
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Abstract
The utility model relates to a large longitudinal slope pipe jacking tunneling model test device. The technical scheme of the utility model is as follows: the pipe jacking device comprises a model box, a pipe jacking mechanism, a tunneling mechanism and a pipe jacking supporting mechanism with an adjustable inclination angle; the model box is filled with a test model soil body and is pre-embedded with a soil body monitoring sensor, one side wall of the model box is formed by splicing a hole inlet baffle plate and a plurality of splicing baffle plates which are positioned at different heights, and a jacking reserved hole is formed in the hole inlet baffle plate; the pipe jacking mechanism is formed by coaxially inserting a plurality of standard pipe joints, is arranged on the pipe jacking support mechanism at a certain inclination angle, one end of the pipe jacking mechanism is provided with the tunneling mechanism and penetrates through the jacking reserved hole to be inserted into a test model soil body in the model box, and the other end of the pipe jacking mechanism is provided with the jacking mechanism; and a spoil conveying mechanism used for conveying spoil generated by the tunneling mechanism to the outside of the model box is arranged in the pipe jacking mechanism. The utility model is suitable for the field of test devices.
Description
Technical Field
The utility model relates to a large longitudinal slope pipe jacking tunneling model test device. Is suitable for the field of test devices.
Background
Compared with the conventional shield method and open cut method, the pipe jacking method has the advantages of low mechanical equipment requirement, small influence on ground traffic and underground pipelines, low overall cost and the like, and is widely applied to urban underground engineering construction in China. Related design and construction technologies are mature, but in actual construction at present, a jacking pipe is mainly used for a horizontal section structure of projects such as a short-distance street crossing channel and a underpass road, and the longitudinal slope of the structure is generally less than 3%. At present, the main factor restricting the construction method from being further popularized and applied to more underground projects such as subways, underground roads, street crossing passageway entrances and exits is the limitation of the longitudinal slope of the structure.
The existing pipe jacking model test device mainly simulates the horizontal tunneling process of a jacking pipe, but cannot simulate the jacking process of the jacking pipe under different large longitudinal slope conditions, for example, the Chinese patent with application patent numbers of 201920103759 and 0, namely 'an indoor test simulation system for pipe jacking construction', the patent cannot simulate the process of assembling prefabricated pipe sections section by section, and in order to find out the change rules of jacking force, ground surface deformation, stress of the jacking pipe sections and the like in the jacking process of the jacking pipe under different large longitudinal slopes (5-30%), a model test device capable of simulating the jacking pipe tunneling under different longitudinal slope conditions is urgently needed.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: aiming at the problems, the large longitudinal slope pipe jacking tunneling model test device is provided.
The technical scheme adopted by the utility model is as follows: the utility model provides a big longitudinal slope push pipe tunnelling model test device which characterized in that: the pipe jacking device comprises a model box, a pipe jacking mechanism, a tunneling mechanism and a pipe jacking supporting mechanism with an adjustable inclination angle;
the model box is filled with a test model soil body and is pre-embedded with a soil body monitoring sensor, one side wall of the model box is formed by splicing a hole inlet baffle plate and a plurality of splicing baffle plates which are positioned at different heights, and a jacking reserved hole is formed in the hole inlet baffle plate;
the pipe jacking mechanism is formed by coaxially inserting a plurality of standard pipe joints, is arranged on the pipe jacking support mechanism at a certain inclination angle, one end of the pipe jacking mechanism is provided with the tunneling mechanism and penetrates through the jacking reserved hole to be inserted into a test model soil body in the model box, and the other end of the pipe jacking mechanism is provided with the jacking mechanism;
and a spoil conveying mechanism used for conveying spoil generated by the tunneling mechanism to the outside of the model box is arranged in the pipe jacking mechanism.
The jacking mechanism is provided with a steel cushion block pipe joint matched with the pipe jacking mechanism and a plurality of jacking jacks connected to the steel cushion block pipe joint.
The tunneling mechanism is provided with a first jacking pipe joint matched with the pipe jacking mechanism, and a cutting cutter disc and a cutter disc motor which are arranged on the first jacking pipe joint.
The spoil conveying mechanism is provided with a spoil box arranged outside the model box and a spoil conveying pipe which is arranged in the pipe jacking mechanism and extends from the tunneling mechanism to the spoil box.
The push pipe supporting mechanism is provided with a push pipe support and a support inclination angle adjusting mechanism connected below the push pipe support, and the push pipe support is provided with a directional guide rail used for supporting the push pipe mechanism.
And the directional guide rail is provided with a pipe joint retaining mechanism for preventing the standard pipe joint from returning.
The pipe joint retaining mechanism comprises a retaining control pin, the end of the retaining control pin, close to the jacking mechanism, is rotatably connected with the directional guide rail through a rotating shaft, and a retaining spring is arranged between the other end of the retaining control pin and the directional guide rail; and the outer wall of the standard pipe joint is provided with a retaining clamping groove which can be matched with the retaining control pin.
The support inclination angle adjusting mechanism is provided with an inclination angle adjusting support and a hydraulic height adjusting support rod.
The soil body monitoring sensor comprises a soil body surface settlement monitoring sensor, a soil body inclinometer pipe and a soil pressure monitoring sensor.
The standard pipe joint is made of cement, gypsum, steel wires and glass fiber materials.
The utility model has the beneficial effects that: the pipe-jacking tunneling model test device can realize pipe-jacking tunneling model tests at different angles through the matching of the model box, the pipe-jacking mechanism, the tunneling mechanism, the pipe-jacking supporting mechanism and the like, and has the advantages of simple structure and convenient operation.
Drawings
Fig. 1 is a schematic structural diagram of the embodiment.
FIG. 2 is a schematic side view of a mold box according to the embodiment.
Fig. 3 is a top view of the embodiment.
FIG. 4 is a side elevation view of the pipe jacking mechanism, the tunneling mechanism, the pipe jacking support mechanism and the like in the embodiment.
Fig. 5 is a partially enlarged schematic view of the cutting cutter head in the embodiment.
FIG. 6 is a schematic view of a pipe joint retaining mechanism in an embodiment.
1. A model box; 2. a pipe jacking bracket; 3. jacking the force-exerting support; 4. jacking a hydraulic system; 5. jacking a jack; 6. a standard pipe section; 6a, a backstop clamping groove; 7. assembling a baffle plate; 8. a hole inlet baffle plate; 9. a steel cushion block pipe joint; 10. a height adjustment support bar; 11. a soil abandoning box; 12. a spoil delivery pipe; 13. a directional guide rail; 14. a pipe joint retaining mechanism; 14a, a backstop spring; 14b, a backstop control pin; 14c, a rotating shaft; 15. testing a model soil body; 16. a soil body surface settlement monitoring sensor; 17. a soil body inclinometer pipe; 18. a sensor fixing bracket; 19. a mold box support; 20. an inclination angle adjusting support; 21. a cutter head is cut; 22. a cutter motor; 23. the first section is jacked into the pipe section; 24. a soil pressure monitoring sensor; 25. jacking the reserved hole; 26. baffle draw-in groove.
Detailed Description
The embodiment is a large longitudinal slope pipe-jacking tunneling model test device which comprises a model box, a pipe-jacking mechanism, a tunneling mechanism, a spoil conveying mechanism, a pipe-jacking supporting mechanism and the like.
In this embodiment, the mold box is placed on a mold box support with adjustable height, a side wall of the mold box is provided with a hole-entering baffle plate and four assembling baffle plates with different heights, wherein the hole-entering baffle plate is provided with a hole-entering preformed hole, and two ends of the hole-entering baffle plate and the assembling baffle plates are inserted into baffle clamping grooves of the mold box. In the embodiment, the heights of the inlet baffle plates in all the baffle plates are adjusted according to the test requirements so as to adapt to the pipe jacking mechanisms with different inclination angles.
In the embodiment, a test model soil body is filled in the model box and a soil body monitoring sensor is pre-embedded, wherein the soil body monitoring sensor comprises a soil body surface settlement monitoring sensor, a soil body inclinometer pipe and a soil pressure monitoring sensor, and the soil body surface settlement monitoring sensor is fixed at the top of the model box through a sensor fixing support.
In the embodiment, the pipe jacking mechanism is formed by coaxially inserting a plurality of standard pipe joints, the standard pipe joints are made of cement, gypsum, steel wires and glass fiber materials, and the head end and the tail end of each standard pipe joint are respectively provided with a male socket borrowing port and a female socket borrowing port which are matched with each other.
In the embodiment, the pipe jacking mechanism is arranged on the pipe jacking support mechanism at a certain inclination angle, one end of the pipe jacking mechanism is provided with the tunneling mechanism and penetrates through a jacking reserved hole on the model box to be inserted into a test model soil body in the model box, and the other end of the pipe jacking mechanism is provided with the jacking mechanism.
The pipe jacking support mechanism in the embodiment is provided with a pipe jacking bracket and a bracket inclination angle adjusting mechanism connected below the pipe jacking bracket, and two directional guide rails used for supporting the pipe jacking mechanism and playing a guiding role are arranged on the pipe jacking bracket.
In the embodiment, a pipe joint retaining mechanism for preventing a standard pipe joint from backing is arranged on the directional guide rail, the pipe joint retaining mechanism comprises a retaining control pin, a retaining spring and a rotating shaft, the retaining control pin is arranged along the advancing direction of the pipe jacking mechanism, the end, close to the jacking mechanism, of the retaining control pin is rotatably connected with the directional guide rail through the rotating shaft, and the retaining spring is arranged between the other section of the retaining control pin and the directional guide rail; and the outer wall of the standard pipe joint is provided with a retaining clamping groove which can be matched with the retaining control pin.
In the jacking process of the pipe jacking mechanism, the retaining spring is compressed, and the retaining control pin does not influence the advance of the pipe joint; in the pipe joint increasing stage, the pipe joint is easy to retreat due to the fact that the whole pipe jacking mechanism is in an inclined state, and when the pipe joint moves to the position, corresponding to the stopping control pin, of the stopping clamping groove on the pipe joint, the stopping spring extends to enable the stopping control pin to be inserted into the stopping clamping groove, so that the pipe joint is prevented from retreating.
In this embodiment, the support inclination angle adjusting mechanism has an inclination angle adjusting support and a hydraulic height adjusting support rod, wherein the inclination angle adjusting support is disposed below the end, away from the mold box, of the push pipe support, the hydraulic height adjusting support rod is disposed below the middle portion of the push pipe support, and the inclination angle adjusting support and the hydraulic height adjusting support rod are matched to support and adjust the inclination angle of the push pipe support, so as to adjust the inclination angle of the push pipe mechanism.
In this embodiment, the jacking mechanism has a steel cushion block pipe joint adapted to a standard joint in the pipe jacking mechanism, and a plurality of jacking jacks axially connected in parallel to the steel cushion block pipe joint, the jacking jacks are supported on the jacking force-applying support through a jacking hydraulic system, and the jacking force-applying support is fixed on the pipe jacking support.
In this embodiment, the tunneling mechanism includes a first jacking pipe joint adapted to a standard joint in the pipe jacking mechanism, and a cutter head motor mounted on the first jacking pipe joint.
The spoil conveying mechanism in this example has a spoil box disposed outside the model box, and a spoil conveying pipe disposed inside the pipe pushing mechanism and extending from the tunneling mechanism to the spoil box, and soil cut by the tunneling mechanism is conveyed into the spoil box through the spoil conveying pipe.
The testing procedure of this example included:
preparing a prefabricated standard pipe joint according to the size required by engineering, and numbering the pipe joints according to the jacking sequence;
preparing soil mass materials in a model box according to actual engineering conditions, uniformly filling and compacting the prepared soil mass materials in the model box in a layering manner, wherein the layering thickness is 10cm, and synchronously pre-burying a soil pressure sensor in the soil mass filling process;
adjusting the position of the whole device by adjusting the model box support and the pipe jacking support mechanism, completing pipe jacking construction preparation, and arranging a soil body inclination measuring sensor and a ground surface settlement monitoring sensor; debugging a data automatic acquisition box signal, carrying out zero setting on an initial value, and starting to acquire monitoring data;
installing a tunneling mechanism, applying jacking thrust through a jacking mechanism, synchronously starting a cutter head electrode of the tunneling mechanism, and outputting the cut soil body into a waste soil box through a conveying pipeline;
the pipe joint is gradually inserted into the soil body along with the cutting of the cutting cutter head and the jacking of the jacking mechanism, after the joint retreating stopping mechanism bounces and clamps the pipe joint, the jacking jack is retracted, the cutting cutter head is closed, the next pipe joint is installed, the jacking force is applied again, the cutter head motor is started at the same time, and the pipe joint is continuously jacked;
repeating the steps until all the pipe joints are jacked; and monitoring parameters such as deformation, pressure and the like of the soil body through the embedded sensor in the whole process of jacking the pipe joint.
Claims (10)
1. The utility model provides a big longitudinal slope push pipe tunnelling model test device which characterized in that: the pipe jacking device comprises a model box, a pipe jacking mechanism, a tunneling mechanism and a pipe jacking supporting mechanism with an adjustable inclination angle;
the model box is filled with a test model soil body and is pre-embedded with a soil body monitoring sensor, one side wall of the model box is formed by splicing a hole inlet baffle plate and a plurality of splicing baffle plates which are positioned at different heights, and a jacking reserved hole is formed in the hole inlet baffle plate;
the pipe jacking mechanism is formed by coaxially inserting a plurality of standard pipe joints, is arranged on the pipe jacking support mechanism at a certain inclination angle, one end of the pipe jacking mechanism is provided with the tunneling mechanism and penetrates through the jacking reserved hole to be inserted into a test model soil body in the model box, and the other end of the pipe jacking mechanism is provided with the jacking mechanism;
and a spoil conveying mechanism used for conveying spoil generated by the tunneling mechanism to the outside of the model box is arranged in the pipe jacking mechanism.
2. The large longitudinal slope pipe jacking tunneling model test device according to claim 1, characterized in that: the jacking mechanism is provided with a steel cushion block pipe joint matched with the pipe jacking mechanism and a plurality of jacking jacks connected to the steel cushion block pipe joint.
3. The large longitudinal slope pipe jacking tunneling model test device according to claim 1, characterized in that: the tunneling mechanism is provided with a first jacking pipe joint matched with the pipe jacking mechanism, and a cutting cutter disc and a cutter disc motor which are arranged on the first jacking pipe joint.
4. The large longitudinal slope pipe jacking tunneling model test device according to claim 1 or 3, characterized in that: the spoil conveying mechanism is provided with a spoil box arranged outside the model box and a spoil conveying pipe which is arranged in the pipe jacking mechanism and extends from the tunneling mechanism to the spoil box.
5. The large longitudinal slope pipe jacking tunneling model test device according to claim 1, characterized in that: the push pipe supporting mechanism is provided with a push pipe support and a support inclination angle adjusting mechanism connected below the push pipe support, and the push pipe support is provided with a directional guide rail used for supporting the push pipe mechanism.
6. The large longitudinal slope pipe jacking tunneling model test device according to claim 5, characterized in that: and the directional guide rail is provided with a pipe joint retaining mechanism for preventing the standard pipe joint from returning.
7. The large longitudinal slope pipe jacking tunneling model test device according to claim 6, characterized in that: the pipe joint retaining mechanism comprises a retaining control pin, the end of the retaining control pin, close to the jacking mechanism, is rotatably connected with the directional guide rail through a rotating shaft, and a retaining spring is arranged between the other end of the retaining control pin and the directional guide rail; and the outer wall of the standard pipe joint is provided with a retaining clamping groove which can be matched with the retaining control pin.
8. The large longitudinal slope pipe jacking tunneling model test device according to claim 5, characterized in that: the support inclination angle adjusting mechanism is provided with an inclination angle adjusting support and a hydraulic height adjusting support rod.
9. The large longitudinal slope pipe jacking tunneling model test device according to claim 1, characterized in that: the soil body monitoring sensor comprises a soil body surface settlement monitoring sensor, a soil body inclinometer pipe and a soil pressure monitoring sensor.
10. The large longitudinal slope pipe jacking tunneling model test device according to claim 1, characterized in that: the standard pipe joint is made of cement, gypsum, steel wires and glass fiber materials.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120929875.5U CN216285260U (en) | 2021-04-30 | 2021-04-30 | Large longitudinal slope pipe-jacking tunneling model test device |
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| CN202120929875.5U CN216285260U (en) | 2021-04-30 | 2021-04-30 | Large longitudinal slope pipe-jacking tunneling model test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116858584A (en) * | 2023-07-07 | 2023-10-10 | 长沙理工大学 | Multifunctional pipe jacking model test device and test method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116858584A (en) * | 2023-07-07 | 2023-10-10 | 长沙理工大学 | Multifunctional pipe jacking model test device and test method |
| CN116858584B (en) * | 2023-07-07 | 2024-04-05 | 长沙理工大学 | Multifunctional pipe jacking model test device and test method |
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