CN108020651B - Landslide model experimental device - Google Patents
Landslide model experimental device Download PDFInfo
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- CN108020651B CN108020651B CN201711222657.2A CN201711222657A CN108020651B CN 108020651 B CN108020651 B CN 108020651B CN 201711222657 A CN201711222657 A CN 201711222657A CN 108020651 B CN108020651 B CN 108020651B
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Abstract
The invention provides a landslide model experiment device which comprises an experiment box, confining pressure loading assemblies respectively arranged on four side surfaces of the experiment box, a rainfall assembly arranged above the experiment box and a seismic fluctuation input assembly used for providing seismic wave input for the experiment box. Through setting up confined pressure loading subassembly, rainfall subassembly and seismic wave input assembly, can consider the actual conditions of inhomogeneous confined pressure, earthquake and rainfall multi-field coupling, simultaneously through setting up confined pressure loading subassembly respectively on four sides at the experimental box for the setting of confined pressure more accords with actual conditions, and the experimental result is comparatively accurate. In addition, the rainfall component provided by the invention can simulate the change of rainfall in a local area, and the accuracy of an experimental result is improved.
Description
Technical Field
The invention relates to an experimental device for analyzing geological disasters, in particular to a landslide model experimental device.
Background
The indoor similar model experiment is a research experiment commonly used for analyzing geological disasters, and the landslide model experiment device is an experiment device for researching landslide disasters.
The existing landslide model experiment device only considers the influence of a single influence factor on landslide, such as earthquake or rainfall, and the existing landslide model experiment device usually ignores the change of the confining pressure on four sides of the model, so that the landslide model experiment device is greatly different from the actual situation, and the experiment result is relatively inaccurate.
Meanwhile, due to the influence of typhoon weather, when the landslide model is in actual rainfall, the rainfall amount of a local area of the same model may be greatly different, and the change of the rainfall amount of the local area is not considered in the conventional landslide model experiment device, so that the accuracy of an experiment result is influenced.
In addition, the existing landslide model experiment device utilizes the vibration table to simulate seismic wave input, vibration input is provided by the vibration table, the test on the seismic capacity of a structure and a building is feasible, however, the propagation input of the seismic wave belongs to fluctuation input for site seismic reaction, larger error exists between the propagation input and the actual situation, meanwhile, the vibration table cannot absorb a scattering field generated by the model, energy consumption can be realized only by utilizing materials of the structure or the model, so that the experiment data of the vibration table and the actually measured seismic motion data have larger difference, and the experiment result is not accurate enough.
In view of this, the applicant has conducted an intensive study on a landslide model experimental apparatus, and has generated the present application.
Disclosure of Invention
The invention aims to provide a landslide model experimental device with relatively accurate experimental result.
In order to achieve the purpose, the invention adopts the following technical scheme:
the landslide model experiment device comprises an experiment box, confining pressure loading assemblies respectively arranged on four sides of the experiment box, a rainfall assembly arranged above the experiment box and a seismic fluctuation input assembly used for providing seismic wave input for the experiment box.
As an improvement of the invention, the experimental box comprises a hinged square frame, four side plates and a bottom plate, wherein the side plates and the bottom plate are abutted against the inner side of the hinged square frame, the four side plates are vertically arranged and are abutted against the same bottom plate, and each confining pressure loading assembly is respectively arranged on the corresponding side plate.
As an improvement of the present invention, the hinged square frame is provided with a fastening structure for fastening the side plate.
As an improvement of the invention, the confining pressure loading assembly comprises a pressurizing pump, a pressurizing pipe connected with the pressurizing pump, a control valve arranged on the pressurizing pipe and more than one membrane bag unit, the membrane bag unit comprises a back plate directly or indirectly detachably and fixedly connected to the side plate and an organic membrane with the periphery hermetically connected to the back plate, a pressure cavity is formed between the organic membrane and the back plate, a pressurizing opening communicated with the pressure cavity is formed in the back plate, and a joint matched with the pressurizing opening is arranged at one end of the pressurizing pipe, which is not connected with the pressurizing pump.
As an improvement of the invention, the pressure port is provided with a relief valve.
As an improvement of the invention, the seismic wave input assembly comprises a bottom input unit comprising a vibration table located below the experimental box and a side input unit comprising a plurality of vibrators arranged between the back plate and the side plate.
As an improvement of the invention, the rainfall assembly comprises a fixed frame and a plurality of guide pipes which are respectively connected to the fixed frame in a sliding manner, the sliding direction of the guide pipes on the fixed frame is vertical to the length direction of the guide pipes, and each guide pipe is connected with a plurality of spray heads which are respectively communicated with the guide pipe in a sliding manner.
By adopting the technical scheme, the invention has the following beneficial effects:
1. through setting up confined pressure loading subassembly, rainfall subassembly and seismic wave input assembly, can consider the actual conditions of inhomogeneous confined pressure, earthquake and rainfall multi-field coupling, simultaneously through setting up confined pressure loading subassembly respectively on four sides at the experimental box for the setting of confined pressure more accords with actual conditions, and the experimental result is comparatively accurate.
2. The rainfall assembly provided by the invention can simulate the change of rainfall in a local area, and the accuracy of an experimental result is improved.
3. The seismic fluctuation input assembly provided by the invention can simulate shear waves, simultaneously considers the problem of scattering of seismic waves in an experimental model, better accords with the actual condition, and further improves the accuracy of experimental results.
Drawings
FIG. 1 is a schematic structural diagram of a landslide model experimental apparatus of the present invention, with a seismic fluctuation input assembly omitted;
FIG. 2 is a schematic structural diagram of a seismic fluctuation input assembly of the landslide model experimental apparatus of the present invention;
FIG. 3 is a schematic view of a part of the structure of the rainfall assembly of the landslide model experiment apparatus of the present invention.
The designations in the figures correspond to the following:
10 test boxes; 11-articulated square frame;
12-side plates; 20-confining pressure loading component;
21-a membrane bag unit; 30-a rainfall assembly;
31-a fixing frame; 32-a catheter;
33-a water storage tank; 34-a flow control valve;
40-a seismic wave input assembly; 41-bottom input unit;
42-lateral input unit.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
As shown in fig. 1 to 3, the landslide model experiment apparatus provided in this embodiment includes an experiment box 10, confining pressure loading assemblies 20 respectively disposed on four sides of the experiment box 10, a rainfall assembly 30 disposed above the experiment box 10 through a bracket, and a seismic wave input assembly 40 for providing seismic wave input to the experiment box 10, that is, there are four confining pressure loading assemblies 20.
The experimental box 10 comprises a hinged square frame 11, and a side plate 12 and a bottom plate (not shown in the figure) abutting against the inner side of the hinged square frame 11, wherein the hinged square frame 11 refers to a square frame formed by mutually hinging a plurality of rod pieces, and the side plate 12 and the bottom plate are preferably made of organic glass plates. In the present embodiment, the inner side is the side facing the internal space surrounded by the articulated square frame 11. The number of the side plates 12 is four, and the side plates correspond to four inner side faces of the hinged square frame 11 respectively, the four side plates 12 are vertically arranged and abut against the same bottom plate, and the bottom plate is directly placed inside the hinged square frame 11, so that the side plates 12 and the bottom plate can jointly enclose an experimental space with an opening at the upper end.
Preferably, in this embodiment, the hinged square frame 11 is provided with a fastening structure for fastening the side plates 12, specifically, two side plates 12 arranged in parallel are fastened on the hinged square frame 11 through the fastening structure, and slots are formed between two ends of the fastened side plates 12 and the hinged square frame 11, the width of each slot is matched with the thickness of the side plate 12, and the other two side plates 12 are respectively inserted into the corresponding slots through two ends to achieve connection, so that when the test is not required, the side plates 12 and the bottom plate can be quickly taken down from the hinged square frame 11, and the transportation and the storage are facilitated. It should be noted that the above-mentioned snap-fit structure may be a conventional structure, as long as the side plate 12 can be snapped, and will not be described in detail herein.
Each confining pressure loading assembly 20 is disposed on a corresponding side plate 12. Taking one confining pressure loading assembly 20 as an example, the confining pressure loading assembly 20 includes a pressure pump (not shown in the figure), a pressure pipe (not shown in the figure) connected with the pressure pump, a control valve arranged on the pressure pipe, and more than one membrane bag unit 21, where the membrane bag unit 21 includes a back plate indirectly detachably and fixedly connected to the side plate 12 and an organic membrane whose periphery is hermetically connected to the side of the back plate far away from the corresponding side plate 12, a pressure chamber is formed between the organic membrane and the back plate, a pressure port communicated with the pressure chamber is formed on the plate, and the pressure port is preferably provided with a switch valve and an overflow valve, where the overflow valve can prevent the pressure value from being changed too much to generate abnormal pressure to a local area of the organic membrane. Because the organic film has certain elasticity, when gas or liquid is filled into the pressure cavity, the organic film can expand and exert confining pressure on objects in the experimental space, when a plurality of film bag units 21 are provided, the same-side non-uniform confining pressure input or even dynamic confining pressure input can be realized by filling different air pressure or hydraulic pressure into the pressure cavity of each film bag unit 21, and the air pressure or hydraulic pressure required to be loaded by each film bag unit 21 needs to be obtained by calculation according to the real-time measurement data during field sampling. It should be noted that, when the seismic wave input assembly 40 is a vibration table assembly used in a conventional landslide model experiment apparatus, the back plate may also be directly detachably and fixedly connected to the side plate 12.
In addition, the end of the pressure pipe not connected with the pressure pump is provided with a joint matched with the pressure port. Thus, the same pressurizing pipe can be fitted to a plurality of bag film units 21, and the confining pressure loading units 20 can share a pressurizing pump, a pressurizing pipe, and a control valve, if necessary.
The seismic wave input assembly 40 may be a vibration table assembly used in a conventional landslide model experiment apparatus, and in order to consider the scattering problem of seismic waves in an experiment model during an experiment, in the present embodiment, the seismic wave input assembly 40 includes a bottom input unit 41 and a side input unit 42, the bottom input unit 41 includes a vibration table located below the experiment box 10, and the side input unit 42 includes a plurality of vibrators uniformly distributed between the corresponding back plate and the side plate 21. The lateral seismic input can be converted to an equivalent load on the boundary by providing the lateral input element 42.
The rainfall assembly 30 comprises a fixing frame 31 and a plurality of guide pipes 32 respectively connected to the fixing frame 31 in a sliding manner, the sliding direction of each guide pipe 32 on the fixing frame 31 is perpendicular to the length direction of the guide pipe 32, each guide pipe 32 is connected with a plurality of spray heads (not shown) respectively communicated with the guide pipe in a sliding manner, of course, the rainfall assembly 30 also comprises a water storage tank 33 for supplying water to each guide pipe 32, the number of the water storage tanks 33 can be determined according to actual needs, and a flow control valve 34 is arranged on a connecting pipeline between each water storage tank 33 and the guide pipe 32 connected with the water storage tank 33.
The present invention has been described in detail with reference to the specific embodiments, but the embodiments of the present invention are not limited to the above embodiments, and those skilled in the art can make various modifications to the present invention based on the prior art, which fall within the scope of the present invention.
Claims (5)
1. A landslide model experiment device is characterized by comprising an experiment box, confining pressure loading assemblies respectively arranged on four side surfaces of the experiment box, a rainfall assembly arranged above the experiment box and a seismic fluctuation input assembly used for providing seismic wave input for the experiment box;
the experimental box comprises a hinged square frame, and side plates and a bottom plate which are abutted against the inner side of the hinged square frame, the number of the side plates is four, the four side plates are vertically arranged and are abutted against the same bottom plate, and each confining pressure loading assembly is respectively arranged on the corresponding side plate;
the confining pressure loading assembly comprises a pressure pump, a pressure pipe connected with the pressure pump, a control valve arranged on the pressure pipe and more than one membrane bag unit, the membrane bag unit comprises a back plate directly or indirectly detachably and fixedly connected to the side plate and an organic membrane hermetically connected to the back plate, a pressure cavity is formed between the organic membrane and the back plate, a pressure port communicated with the pressure cavity is formed in the back plate, and a joint matched with the pressure port is arranged at one end, not connected with the pressure pump, of the pressure pipe.
2. The landslide model experimental facility of claim 1 wherein said hinged square frame is provided with a snap-fit structure for snap-fitting said side panels.
3. The landslide model experimental facility of claim 1 wherein said pressurization port is provided with a relief valve.
4. The landslide model experiment device of claim 1 wherein the seismic wave input assembly comprises a bottom input unit comprising a vibration table positioned below the experimental box and a side input unit comprising a plurality of vibrators positioned between the back plate and the side plate.
5. The landslide model experiment device of claim 1 or claim 2, wherein the rainfall assembly comprises a fixed frame and a plurality of guide pipes slidably connected to the fixed frame, the guide pipes slide on the fixed frame in a direction perpendicular to a length direction of the guide pipes, and each guide pipe is slidably connected with a plurality of spray heads respectively communicated with the guide pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711222657.2A CN108020651B (en) | 2017-11-29 | 2017-11-29 | Landslide model experimental device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711222657.2A CN108020651B (en) | 2017-11-29 | 2017-11-29 | Landslide model experimental device |
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| CN108020651A CN108020651A (en) | 2018-05-11 |
| CN108020651B true CN108020651B (en) | 2020-07-17 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102681028B (en) * | 2012-06-04 | 2013-11-20 | 中国地质大学（武汉） | Multi-operating mode frame type portable landslide testing device for geomechanical model |
| CN103885095B (en) * | 2014-01-10 | 2016-08-17 | 中国人民解放军理工大学 | Face uniform rainfall field stimulation device |
| CN104634946B (en) * | 2015-02-05 | 2017-01-11 | 中国矿业大学(北京) | Slope model loading testing device |
| CN104751725B (en) * | 2015-04-21 | 2018-01-30 | 河海大学 | Slope and land slide teaching demonstration device and test method |
| CN206148042U (en) * | 2016-07-22 | 2017-05-03 | 中国人民解放军后勤工程学院 | Landslide simulation experiment platform |
| CN106706886B (en) * | 2017-02-27 | 2023-05-30 | 西安长庆科技工程有限责任公司 | Rainfall slope model experiment device and method under lateral non-uniform loading condition |
| CN107144682A (en) * | 2017-05-24 | 2017-09-08 | 黑龙江科技大学 | Simulate the experimental rig and method of earthquake and the influence of rainfall Upon Slope Stability |
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