CN102830217B - The critical experimental study device that subsides of the variable multiscale coupling of fracture opening - Google Patents
The critical experimental study device that subsides of the variable multiscale coupling of fracture opening Download PDFInfo
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- CN102830217B CN102830217B CN201210323429.5A CN201210323429A CN102830217B CN 102830217 B CN102830217 B CN 102830217B CN 201210323429 A CN201210323429 A CN 201210323429A CN 102830217 B CN102830217 B CN 102830217B
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Abstract
The critical experimental study device that subsides of the variable multiscale coupling of fracture opening, can realize the karst ground subsidence experimental study under different fracture opening and hydrodynamic force combination condition, and determine the critical condition of subsiding of test model, thus sets up the metewand yardstick that subsides.It comprises: underground water is dived and lost simulation system, and for having the casing of hollow groove and upper end open structure, its inside groove is communicated with by intensive aperture with water jacket, bottom inside groove, arrange slotted opening; Fracture opening control system, is arranged at and hides slotted opening lower port, be made up of moveable cover plate and governor motion; Simulation system falls in rain, is fixedly installed on above inside groove port; Real-time monitoring system, is made up of the camera being arranged on model key position and the monitoring computer be attached thereto.
Description
Technical field
The present invention relates to the critical experimental study device that subsides of the variable multiscale coupling of a kind of fracture opening, for the Prevention technology of covered karst district, karst region Foundation Karst surface collapse, under acquisition equal conditions, karst ground subsidence venture analysis and treatment effect detect reference data.
Background technology
China's karst blazons, and can the geologic hazard based on the corrosion of lava difference take place frequently, the casualty loss that railway, highway, building etc. cause because of ground collapse remains high every year.Along with the fast development of China Express Railway, the harm that karst ground subsidence causes also sharply increases.The complicacy of growing because of Karst Features and latent property, in addition the many factors of karst ground subsidence is affected, comparatively be difficult to site test with test as the means of karst ground subsidence being carried out to systematic study, thus cannot further investigate the critical condition of karst ground subsidence and coupling effect, to the Prevention technology of karst ground subsidence, so far still neither one system, ripe application technology benchmark, no matter the research of design analysis application technology or construction quality standard, all be difficult to obtain breakthrough, the development of pavement planer technology meets with severe bottleneck.
In the research of existing karst ground, model test mainly concentrates on rainfall Vertical Infiltration and fixing aperture crack and to subside two aspects.In order to shorten the test period, the fracture opening of test simulation is usually all larger, its research conclusion mainly concentrates on a certain great soil group and whether subsides under water Vertical Infiltration condition and last in length, but problem---the critical condition of subsiding of whether subsiding under can not answering minimum Karst Fissures aperture and hydrodynamic force (and other) combination condition.Thus, the metewand yardstick that subsides cannot be set up in practical application.
Critical condition is for the Prevention technology of karst ground subsidence, be the benchmark passed judgment on of regulation whether design analysis be also whether regulation object reaches opinion scale, and based on the complicacy of covered karst corrosion fissure and latent property, on-the-spot generally do not possess desirable, a large amount of, Cyclic test study condition, therefore, by the analysis to the example that subsides in a large number, build desirable, parameter can accurate measurements, the only way that just become to carry out karst ground subsidence systematic study toward renaturation shop experiment Study system.Comprehensive existing test model and research purpose, model construction key link is, possesses single condition continuously toward the condition of renaturation experimental test and the condition of multiple influence factor coupling effect experimental test that subsides.
Summary of the invention
Technical matters to be solved by this invention is to provide the critical experimental study device that subsides of the variable multiscale coupling of a kind of fracture opening, the karst ground subsidence experimental study under different fracture opening and hydrodynamic force combination condition can be realized, and determine the critical condition of subsiding of test model, thus set up the metewand yardstick that subsides.
The technical solution adopted for the present invention to solve the technical problems is as follows:
The critical experimental study device that subsides of the variable multiscale coupling of fracture opening, it is characterized in that it comprises: underground water is dived and lost simulation system, for having the casing of hollow groove and upper end open structure, its inside groove is communicated with by intensive aperture with water jacket, bottom inside groove, arrange slotted opening; Fracture opening control system, is arranged at and hides slotted opening lower port, be made up of moveable cover plate and governor motion; Simulation system falls in rain, is fixedly installed on above inside groove port; Real-time monitoring system, by be arranged on inside groove upper port and the camera in outside below cover plate and the monitoring computer that is attached thereto are formed.
The invention has the beneficial effects as follows, the karst ground subsidence experimental study under different fracture opening and hydrodynamic force combination condition can be realized, and determine the critical condition of subsiding of test model, thus set up the metewand yardstick that subsides, it is the opinion scale whether the design analysis judge benchmark of whether renovating reaches with regulation object that the Prevention technology for karst ground subsidence provides.Compared with prior art there is following outstanding feature: utilize back type groove structure and fracture opening control system effectively to achieve seepage flow and to dive the test simulation of erosion process; Improve test efficiency, reduce working strength, be convenient to the collection of Test Information; Test unit dirigibility is strong, can according to research needs, and the latent erosion of expanding under the multiple environmental baselines such as rain falls, Suction, drying and watering cycle is subsided simulation; Effectively achieve the test simulation that covered karst under different fracture opening condition subsides, checking also establishes the theory that over-laying-karst Collapse exists critical fissure limit accordingly, and test unit can be applied to during different soil evaluates with the karst ground subsidence Research And Engineering of Fracture Width combination condition; Simple and practical, sturdy and durable, good stability.
Accompanying drawing explanation
This instructions comprises following three width accompanying drawings:
Fig. 1 is the structural representation of the critical experimental study device that subsides of the variable multiscale coupling of fracture opening of the present invention;
Fig. 2 is the schematic diagram returning type groove structure in the critical experimental study device that subsides of the variable multiscale coupling of fracture opening of the present invention
Fig. 3 is the structural drawing of fracture opening governor motion in the critical experimental study device that subsides of the variable multiscale coupling of fracture opening of the present invention.
Parts shown in figure and corresponding mark: inside groove 10a, water jacket 10b, inner panel 11, outside plate 12, base plate 13, slotted opening 14, seepage flow hole 15, guide rail 16, cover plate 20, screw rod 21, nut 22, spray equipment 30, piezometric tube 40, camera 41.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
With reference to Fig. 1, the critical experimental study device that subsides of the variable multiscale coupling of fracture opening of the present invention, mainly comprises following a few major part:
One, underground water is dived and is lost simulation system, and for having the casing of hollow groove and upper end open structure, its inside groove 10a is communicated with by intensive aperture with water jacket 10b, arranges slotted opening 14 bottom inside groove 10a.Fill soil sample in inside groove 10a during test, water filling simulated groundwater water level in water jacket 10b, the water in water jacket 10b is infiltrated by intensive aperture and fills soil sample.Draining and water supply installation are set at water jacket 10b edge, control inside groove 10a, water jacket 10b water level satisfied test needs.
Two, fracture opening control system, is arranged at and hides slotted opening 14 lower port, be made up of moveable cover plate 20 and governor motion, changes fracture opening by movable cover plate 20 and the relative position of slotted opening 14 lower port, and warranty test precision.
Three, simulation system falls in rain, is fixedly installed on above inside groove 10a port, indulges lateral separation install several sprinkler tips, simulated rainfall by hollow steel pipe.In hollow steel pipe porch, flowmeter is installed, controls rainfall amount and rainfall intensity, meet the needs of different condition of raining.
Four, real-time monitoring system, be made up of with the monitoring computer be attached thereto the camera 41 being arranged on model key position, utilize monitoring of software, the consecutive variations of real-time monitored model key position, improves work efficiency, alleviates artificial observation burden.
The present invention compared with prior art has following outstanding feature:
1, utilize back type groove structure and fracture opening control system effectively to achieve seepage flow to dive the test simulation of erosion process; Improve test efficiency, reduce working strength, be convenient to the collection of Test Information;
2, test unit dirigibility is strong, can according to research needs, and the latent erosion of expanding under the multiple environmental baselines such as rain falls, Suction, drying and watering cycle is subsided simulation;
3, the test simulation utilizing fracture opening control system effectively to achieve covered karst under different fracture opening condition to subside, checking also establishes the theory that over-laying-karst Collapse exists critical fissure limit accordingly, and test unit can be applied to during different soil evaluates with the karst ground subsidence Research And Engineering of Fracture Width combination condition.
4, simple and practical, sturdy and durable, good stability.
Fig. 1 and Fig. 2 shows a kind of concrete structure of described casing and governor motion, and namely casing is welded by inner panel 11, outside plate 12 and base plate 13, and inner panel 11 adopts sieve tray, and slotted opening 14 is arranged on base plate 13 central part.Base plate 13 is fixedly installed pair of guide rails 16 in slotted opening 14 both sides, and cover plate 20 is mounted thereon.Governor motion is made up of the screw rod 21 matched, nut 22, and wherein nut 22 and cover plate 20 form a fixed connection.On base plate 13 along inside groove (10a) in length and breadth to, be provided with seepage flow hole 15 along water jacket 10b hoop is spaced apart, each seepage flow hole 15 is connected with the piezometric tube 40 being fixedly installed on casing side respectively by flexible pipe, by the change of piezometric tube 40 Real-Time Monitoring inside soil body water level.With reference to Fig. 1, camera 41 is arranged on inside groove 10a upper port and cover plate less than 20 outside usually.
Some principles of the critical experimental study device that subsides of the above variable multiscale coupling of fracture opening of the present invention that just explains through diagrams, be not the present invention to be confined to shown in and in described concrete structure and the scope of application, therefore every corresponding modify of being likely utilized and equivalent, all belong to the scope of the claims that the present invention applies for.
Claims (4)
1. the critical experimental study device that subsides of the variable multiscale coupling of fracture opening, it is characterized in that it comprises: underground water is dived and lost simulation system, for having the casing of hollow groove and upper end open structure, its inside groove (10a) is communicated with by intensive aperture with water jacket (10b), arranges slotted opening (14) in inside groove (10a) bottom; Fracture opening control system, is arranged at and hides slotted opening (14) lower port, be made up of moveable cover plate (20) and governor motion; Simulation system falls in rain, is fixedly installed on above inside groove (10a) port; Real-time monitoring system, by be arranged on inside groove (10a) upper port and cover plate (20) camera (41) in outside and the monitoring computer that is attached thereto are formed below.
2. the critical experimental study device that subsides of the variable multiscale coupling of fracture opening as claimed in claim 1, it is characterized in that: described casing is made up of inner panel (11), outside plate (12) and base plate (13), inner panel (11) is sieve tray, and slotted opening (14) is arranged on base plate (13) central part.
3. the critical experimental study device that subsides of the variable multiscale coupling of fracture opening as claimed in claim 2, is characterized in that: described base plate (13) is fixedly installed pair of guide rails (16) in slotted opening (14) both sides, cover plate (20) is mounted thereon; Described governor motion is made up of the screw rod matched (21), nut (22), and wherein nut (22) and cover plate (20) form a fixed connection.
4. the critical experimental study device that subsides of the variable multiscale coupling of fracture opening as claimed in claim 2, it is characterized in that: on described base plate (13) along inside groove (10a) in length and breadth to, be provided with seepage flow hole (15) along water jacket (10b) hoop is spaced apart, each seepage flow hole (15) is connected with the piezometric tube (40) being fixedly installed on casing side respectively by flexible pipe.
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| CN103645297B (en) * | 2013-12-13 | 2015-11-11 | 中国神华能源股份有限公司 | The analogue means of karst collapse |
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| CN110161213A (en) * | 2019-05-31 | 2019-08-23 | 贵州大学 | A kind of experimental provision for simulating Karst region karst collapse |
| CN117110585B (en) * | 2023-10-23 | 2023-12-26 | 中国地质大学（北京） | Test equipment and method for simulating surface water erosion and root system seepage guiding action to promote cracking and seam formation |
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