CN213175626U - Extrusion type deformation prediction device for tunnel weak surrounding rock - Google Patents
Extrusion type deformation prediction device for tunnel weak surrounding rock Download PDFInfo
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- CN213175626U CN213175626U CN202021720021.8U CN202021720021U CN213175626U CN 213175626 U CN213175626 U CN 213175626U CN 202021720021 U CN202021720021 U CN 202021720021U CN 213175626 U CN213175626 U CN 213175626U
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Abstract
The utility model discloses a tunnel weak surrounding rock extrusion type deformation prediction device, which comprises a deformation prediction instrument, an expander, a die stamping device and an operating rod, wherein the expander and the die stamping device are fixed at the same end of the operating rod, and are connected with a hydraulic transfer switch and a high-pressure oil pump through different high-pressure oil pipes, and the high-pressure oil pump is also connected with a point load instrument; the surface of the impression device is also wrapped with a printing film layer for engraving rock stratum cracks, and the high-pressure oil pump is also connected with a point load instrument and is connected with a deformation predictor through a pressure display module; when the device is used, the hole is tested through the expander and the die device to carry out oil pressure fracturing and re-carve the corresponding rock mass cracks, the corresponding ground pressure value is obtained through the analysis of the rock mass cracks, and meanwhile, the point load value of the rock mass is detected through the point load instrument; the deformation prediction instrument is combined with a Hoek method to analyze the ground pressure value and the point load value and then realize the prediction of rock deformation; the device has the advantages of convenience in use, high measurement efficiency and high measurement precision.
Description
Technical Field
The utility model relates to a country rock test technical field, concretely relates to tunnel weak country rock extrusion type warp prediction device.
Background
The tunnel engineering crossing complex geological conditions encounters more and more large deformation problems of tunnel surrounding rocks, such as a Qinghai corner-closing tunnel, a Bao central line Dazhailing tunnel, a fort beam tunnel, a Nankun line Jiazhuan tunnel, a Chuzang line Erlangshan highway tunnel, a Yuganghua mountain highway tunnel, a Yiwan line fort tunnel, a Lanyu line Mozhai mountain tunnel, a Lanxin line Wuqiling tunnel and the like. The problems of primary support cracking, steel frame distortion, intrusion clearance and the like are often caused by large deformation of the extruded surrounding rock in the construction process of the soft rock deep-buried tunnel passing through the high ground stress area, and the prediction and control of the problems are difficult problems to be solved urgently. Therefore, the prediction research of the deformation of the surrounding rock with high ground stress soft rock extrusion is carried out, a targeted control measure is provided, and the key point for realizing the deformation control of the surrounding rock in the construction of the soft rock deep-buried tunnel in the high ground stress area is realized.
Through the research on tunnel compressive deformation in recent years, by means of a Hoek method, the prediction of large compressive deformation under the condition of high-ground-stress soft rock is researched by judging the compressive deformation degree and the ground stress state of surrounding rock by adopting a compression factor; the key points of the method are the acquisition of point load strength, the acquisition of ground stress values and the estimation of rock mass strength on site, but the difficulty in acquiring the ground stress and the point load values of the weak rock mass in the prior art is high, so that the method is not beneficial to the prediction of the deformation of the weak rock mass.
SUMMERY OF THE UTILITY MODEL
To the point load that exists among the prior art and the defect that ground stress acquisition difficulty, efficiency of software testing are low, the utility model discloses a weak country rock of tunnel warp prediction device adopts the utility model discloses can realize acquireing fast of weak rock body ground stress and point load value, and then realize the prediction to weak country rock extrusion deformation of tunnel.
The prediction device also comprises an operating rod, and the expander and the die stamping device are fixedly arranged at the same end of the operating rod; a plurality of high-pressure oil pipes which are respectively communicated with the expander and the die stamping device are arranged in the operating rod, and the other ends of the high-pressure oil pipes are connected with a high-pressure oil pump through a hydraulic change-over switch; the surface of the impression device is wrapped with a printing film layer for engraving rock stratum cracks; the high-pressure oil pump is also connected with a point load instrument and is connected with the deformation predictor through a pressure display module.
Preferably, the expander and the die are both annular sleeves made of expanded rubber, the annular sleeves are provided with contraction cavities used for containing high-pressure oil, and the contraction cavities are communicated with the high-pressure oil pipes.
Preferably, the operating rod is made of a stainless steel pipe; the printing film layer is made of semi-vulcanized rubber, and the thickness of the printing film layer is 3-5 mm.
Preferably, the other end of the operating rod is connected with an extension sleeve in a threaded mode.
Preferably, the point load meter comprises a frame, a sliding plate is arranged on the frame in a sliding manner, and a dynamic pressure head and a static pressure head which are matched with each other are arranged between the sliding plate and the frame; and a hydraulic jack for driving the sliding plate to move is fixedly arranged on the rack and is connected with a high-pressure oil pump through a high-pressure oil pipe.
Preferably, a pointer and a scale which are matched with each other are further arranged between the sliding plate and the rack.
Preferably, the frame is symmetrically provided with two guide posts, and the sliding plate is slidably arranged on the guide posts.
Preferably, the printing film layer is made of semi-vulcanized rubber, and the thickness of the printing film layer is 3-5 mm.
Preferably, the deformation prediction instrument is further provided with a USB interface for connecting a control terminal.
Preferably, the front end of the operating rod is fixedly provided with a conical guide head.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model comprises a deformation predictor, an expander and a die stamping device, and also comprises an operating rod, wherein the expander and the die stamping device are fixed at the same end of the operating rod, and are connected with a hydraulic change-over switch and a high-pressure oil pump respectively through a high-pressure oil pipe positioned in the operating rod; the surface of the die stamping device is also wrapped with a printing film layer (usually vulcanized rubber) for stamping rock stratum cracks, and the high-pressure oil pump is also connected with a point load meter and is connected with a deformation predictor through a pressure display module;
when the utility model is used, the expander and the die device are simultaneously fed into the drilled test hole through the operating rod, then high-pressure hydraulic oil is injected into the expander through the high-pressure oil pump, the expander pushes the inner wall of the hole in the process of expanding all around, and when the pressure of the hydraulic oil is enough, the surrounding rock of the hole wall is cracked at the position of minimum shear stress; releasing pressure of the expander, adjusting the die to the fracture section of the hole wall, pressurizing the die again, opening the rock fracture section again, ensuring that semi-vulcanized rubber of the printing film layer is extruded into the gap, realizing the re-engraving operation of the crack, and releasing pressure of the die after the printing film laminate is cured, so that the film printing device can be taken out; the tester combines the reference line calibrated in advance to definitely know the position and the trend of the fracture surface measured by the hole (namely the direction of the maximum horizontal main pressure stress), the deformation predictor automatically generates a pressure-time curve according to a time value and a received pressure value and transmits the curve to a corresponding control computer, and a worker can quickly obtain the ground stress value according to the pressure-time curve and the analysis method of the water-induced fracturing method, so that the utility model realizes the quick acquisition of the ground stress value and the distribution condition thereof and improves the detection efficiency;
and meanwhile, a point load instrument is pressurized through a high-pressure oil pump, the point load test of the on-site sampling rock mass is completed, a corresponding point load value is obtained, and the obtained ground stress value and point load strength are automatically calculated and analyzed through a computer internal prediction system by a worker through an extrusion factor method and a Hoek Marino method, so that the grade and the magnitude of the deformation of the extrusion type weak surrounding rock can be rapidly predicted.
Compared with the prior art, the utility model discloses a hydraulic pressure change over switch's adjustment conversion can be realized the measurement to ground stress and rock point load value at the job site, has improved detection efficiency, and its operation is extremely simple and convenient simultaneously, and measuring result can reach in real time, has guaranteed the ageing and the precision of detection.
2. The expander and the die are both annular and made of expanded rubber, and the expander and the die are provided with the contraction cavities communicated with the high-pressure oil pipe, so that the structural design can reduce the size of the expander and the die while ensuring the contraction characteristics of the expander and the die on one hand, further reduce the size of a test hole and reduce the test cost; meanwhile, each component is simple to assemble and easy and convenient to operate, and the testing efficiency is improved.
3. The operating rod of the utility model is made of stainless steel pipe, which improves the structural strength of the operating rod, facilitates taking and placing the expander and the die device, and meanwhile, the operating rod can not be rusted when working in moist environments such as tunnels, and the service life of the operating rod is prolonged; the printing film layer is made of semi-vulcanized rubber, and the thickness of the printing film layer is 3-5mm, so that the source of the printing film layer is wide, and the cost can be reduced; on the other hand, the semi-vulcanized rubber has good engraving effect, and can preserve the engraved lines for 2-3 hours, thereby effectively ensuring the detection timeliness and improving the detection precision; meanwhile, the semi-vulcanized rubber can be recovered automatically, and the raw materials are recycled.
The utility model discloses a 3-5mm thick semi-vulcanized rubber reduces check out test set's volume when it can guarantee the seal crack quantity as seal rete to reduce the internal diameter of test hole, reduce the detection cost.
4. Be provided with the extension sleeve on the action bars, make things convenient for the staff to connect reserve action bars according to operating condition to realize the extension of action bars, satisfy the needs that the deep hole detected.
5. The point load meter of the utility model comprises a frame, a sliding plate is arranged on the frame, a dynamic pressure head and a static pressure head which are mutually matched are arranged between the sliding plate and the frame, and the sliding plate is driven by a hydraulic jack connected with a high-pressure oil pump; the design can simplify the structure of the point load instrument and improve the reliability of the equipment; meanwhile, the high-pressure oil pump is directly connected with the high-pressure oil pump, so that the existing equipment is fully utilized, and the detection equipment is simplified.
6. The utility model discloses still be provided with the pointer and the scale of mutually supporting between slide and frame, be convenient for read the displacement change value of dynamic pressure head around the experiment fast.
7. The utility model discloses a slide slides and sets up on the guide pillar, carries on spacingly to the slide, avoids it to take place axial rotation, makes the slide can only slide in vertical direction to improve equipment's detection precision.
8. The utility model is also provided with a USB interface connected with the control terminal, and can be conveniently connected with the control terminals such as notebook computers and PC machines through high interfaces, thereby realizing the processes of on-site test, on-site analysis and on-site detection result issuing, and greatly accelerating the detection efficiency; meanwhile, the detection timeliness is also ensured.
9. The utility model discloses be provided with at the front end of action bars fixedly and be conical seeker, will test debris direction both sides in the hole through the seeker, make things convenient for the quick installation of action bars, improve detection efficiency.
10. The die device of the utility model is positioned at the front end of the expander and arranged at an interval of 5-10cm, and the switching between different devices can be realized only by pulling the operating rod outwards in the process of converting the expander into the die device, thereby greatly simplifying the operation procedure of the device and improving the detection efficiency; meanwhile, the distance between the two is 5-10cm, the problems of drilling depth extension and complex operation caused by overlarge distance can be avoided, the problem of equipment mutual interference caused by too short distance can be avoided, the detection precision of the equipment is improved, and the detection cost is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the point load gauge of the present invention;
FIG. 3 is a schematic view of the expander of the present invention;
reference numerals: 1. the device comprises a deformation prediction instrument, 2, an expander, 3, an impression instrument, 4, an operating rod, 5, a high-pressure oil pipe, 6, a hydraulic change-over switch, 7, a high-pressure oil pump, 8, a printing film layer, 9, a point load instrument, 10, a pressure display module, 11, a contraction cavity, 12, an extension sleeve, 13, a USB interface, 14, a conical guide head, 91, a rack, 92, a sliding plate, 93, a dynamic pressure head, 94, a static pressure head, 95, a hydraulic jack, 96, an indicating needle, 97, a scale, 98 and a guide column.
Detailed Description
The present invention will be further explained by the following embodiments:
embodiment mode 1
As a basic embodiment of the present invention, the present embodiment discloses a device for rapidly testing the ground stress of surrounding rock in a tunnel, the specific structure is shown in fig. 1 to fig. 3, and the device comprises a deformation prediction instrument 1, an expander 2, an impression device 3 and an operating rod 4, wherein the operating rod 4 is made of a stainless steel tube, one end of the operating rod is connected with an extension sleeve 12 through a screw thread, the expander 2 and the impression device 3 are both fixedly arranged at the other end of the operating rod 4, the impression device 3 is positioned at the front end of the expander 2 during installation, the installation distance between the expander and the impression device is 5-10cm according to needs, and a conical guide head 13 is also arranged at the top end of the operating rod 4;
the expander 2 and the impression device 3 are both made of expanded rubber and are both of annular structures, so that the expander 2 and the impression device 3 are sleeved on the operating rod 4, meanwhile, the expander 2 and the impression device 3 are both provided with a contraction cavity 11, the contraction cavity 11 is provided with two connectors communicated with the outside, 4 high-pressure oil pipes 5 are arranged in the operating rod 4, two of the high-pressure oil pipes are oil inlet pipes and two of the high-pressure oil pipes are pressure relief pipes, the connectors of the expander 2 and the impression device 3 are respectively connected with one oil inlet pipe and one pressure relief pipe, the other ends of the two pressure relief pipes are connected with oil return ports of the high-pressure oil pump 7, the other ends of the two oil inlet pipes are connected with different outlets of the hydraulic change-over switch 6, and the inlet end of the hydraulic change-over;
the high-pressure oil pump 7 is also connected with a pressure display module 10 for displaying the pressure of the hydraulic oil, and the pressure display module 10 can be a needle type indicator or a digital detection module; meanwhile, the pressure display module 10 is also connected with the signal input end of the ground stress tester 1 through a connecting wire, so that the corresponding pressure value is transmitted to the ground stress tester 2 in real time; meanwhile, the ground stress tester 2 is also provided with a USB interface 13, so that the ground stress tester can be conveniently connected with control terminals such as a notebook computer and a PC terminal in real time;
the surface of the die plate 3 is further wrapped with a printing film layer 8, the thickness of the printing film layer 8 is 1-3mm according to actual process requirements, and meanwhile the printing film layer 8 is made of semi-vulcanized rubber.
The point load instrument 9 comprises a frame 91 and a sliding plate 92, wherein the top of the frame 91 is fixedly provided with a static head 94, two sides of the frame 91 are also provided with guide posts 98 which are parallel to each other, and two sides of the sliding plate 92 are connected with the two guide posts 98 in a sliding manner; a dynamic head 93 opposite to the static head 94 is fixedly arranged on the sliding plate 92; a hydraulic jack 95 is fixedly arranged at the bottom of the frame 91, and an oil inlet end of the hydraulic jack 95 is connected with a high-pressure oil pump 7 through a high-pressure oil pipe 5, so that the sliding plate 92 is driven to move through the movement of the hydraulic jack 95; and a scale 97 and an indicating needle 96 which are matched with each other are arranged between the frame 91 and the sliding plate 92.
The utility model discloses in the use send into expander and die ware simultaneously through the action bars and bore the measuring hole of getting, then carry high pressure oil through the high-pressure oil pump in to the expander, and then through the inflation of expander with the measuring hole fracturing, again through inputing high pressure oil to the die ware and make its inflation, and then drive closed stratum and open again, and extrude half vulcanized rubber into the crack, accomplish the operation of carving again the stratum crack, obtain corresponding point load value through the point load appearance simultaneously; the deformation prediction instrument is combined with the pressure value transmitted by the pressure display module and a corresponding time relation to generate a pressure-time curve; the method comprises the steps that a worker analyzes cracks and pressure of a printing film layer according to a pressure-time curve and an analysis method of a water-induced fracturing method to obtain the size and direction conditions of a ground stress value, and the obtained ground stress value and point load strength are automatically calculated and analyzed through a computer system by adopting an extrusion factor method and a Hoek Marinos method, so that the prediction of the deformation grade and the quantity value of the extrusion type weak surrounding rock can be realized;
compared with the prior art, the utility model discloses an expander and the die ware integrated as an organic whole have realized the short-term test to ground stress and have acquireed, obtain some load values through some load appearance at the experiment scene simultaneously, and it can acquire all detection parameters at the experiment scene, has improved detection efficiency greatly.
Claims (10)
1. The utility model provides a tunnel weak surrounding rock extrusion type deformation prediction device, includes deformation prediction appearance (1), expander (2) and impression ware (3), its characterized in that: the prediction device also comprises an operating rod (4), and the expander (2) and the impression device (3) are fixedly arranged at the same end of the operating rod (4); a plurality of high-pressure oil pipes (5) which are respectively communicated with the expander (2) and the die stamping device (3) are arranged in the operating rod (4), and the other ends of the high-pressure oil pipes (5) are connected with a high-pressure oil pump (7) through a hydraulic change-over switch (6); the surface of the die stamping device (3) is wrapped with a film stamping layer (8) for stamping rock stratum cracks; the high-pressure oil pump (7) is also connected with a point load instrument (9), and the high-pressure oil pump (7) is connected with the deformation prediction instrument (1) through a pressure display module (10).
2. The device for predicting the extrusion type deformation of the weak surrounding rock of the tunnel according to claim 1, wherein: expander (2) and die ware (3) are the annular casing that adopts the preparation of inflation rubber, and the annular casing is provided with shrink chamber (11) that are used for holding high-pressure oil, shrink chamber (11) and high pressure fuel pipe (5) intercommunication.
3. The device for predicting the extrusion type deformation of the weak surrounding rock of the tunnel according to claim 1, wherein: the operating rod (4) is made of a stainless steel pipe; the film printing layer (8) is made of semi-vulcanized rubber, and the thickness of the film printing layer is 3-5 mm.
4. The device for predicting the extrusion type deformation of the weak surrounding rock of the tunnel according to claim 1, wherein: the other end of the operating rod (4) is connected with an extension sleeve (12) in a threaded manner.
5. The device for predicting the extrusion type deformation of the weak surrounding rock of the tunnel according to claim 1, wherein: the point load meter (9) comprises a rack (91), a sliding plate (92) is arranged on the rack (91) in a sliding manner, and a dynamic pressure head (93) and a static pressure head (94) which are matched with each other are arranged between the sliding plate (92) and the rack (91); and a hydraulic jack (95) for driving the sliding plate (92) to move is further fixedly arranged on the rack (91), and the hydraulic jack (95) is connected with the high-pressure oil pump (7) through a high-pressure oil pipe (5).
6. The device for predicting the extrusion type deformation of the weak surrounding rock of the tunnel according to claim 5, wherein: and an indicating needle (96) and a scale (97) which are matched with each other are also arranged between the sliding plate (92) and the rack (91).
7. The device for predicting the extrusion type deformation of the weak surrounding rock of the tunnel according to claim 5, wherein: two guide posts (98) are symmetrically arranged on the rack (91), and the sliding plate (92) is slidably arranged on the guide posts (98).
8. The device for predicting the extrusion type deformation of the weak surrounding rock of the tunnel according to claim 1, wherein: the film printing layer (8) is made of semi-vulcanized rubber, and the thickness of the film printing layer is 3-5 mm.
9. The device for predicting the extrusion type deformation of the weak surrounding rock of the tunnel according to claim 1, wherein: and the deformation prediction instrument (1) is also provided with a USB interface (13) for connecting a control terminal.
10. The device for predicting the extrusion type deformation of the weak surrounding rock of the tunnel according to claim 1, wherein: the front end of the operating rod (4) is fixedly provided with a conical guide head (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021720021.8U CN213175626U (en) | 2020-08-18 | 2020-08-18 | Extrusion type deformation prediction device for tunnel weak surrounding rock |
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| CN202021720021.8U CN213175626U (en) | 2020-08-18 | 2020-08-18 | Extrusion type deformation prediction device for tunnel weak surrounding rock |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114184486A (en) * | 2021-12-08 | 2022-03-15 | 西南科技大学 | Device and method for measuring fracture toughness of rock under high-temperature and high-pressure conditions |
| CN115541857A (en) * | 2022-11-25 | 2022-12-30 | 叙镇铁路有限责任公司 | Integrated cement-based material self-repairing performance detection device |
-
2020
- 2020-08-18 CN CN202021720021.8U patent/CN213175626U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114184486A (en) * | 2021-12-08 | 2022-03-15 | 西南科技大学 | Device and method for measuring fracture toughness of rock under high-temperature and high-pressure conditions |
| CN114184486B (en) * | 2021-12-08 | 2023-12-12 | 西南科技大学 | Rock fracture toughness measuring device and method under high-temperature and high-pressure conditions |
| CN115541857A (en) * | 2022-11-25 | 2022-12-30 | 叙镇铁路有限责任公司 | Integrated cement-based material self-repairing performance detection device |
| CN115541857B (en) * | 2022-11-25 | 2023-02-03 | 叙镇铁路有限责任公司 | Integrated cement-based material self-repairing performance detection device |
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