CN103063460B - The flat test device that a kind of rock side slope destroys and experimental technique thereof - Google Patents
The flat test device that a kind of rock side slope destroys and experimental technique thereof Download PDFInfo
- Publication number
- CN103063460B CN103063460B CN201210587985.3A CN201210587985A CN103063460B CN 103063460 B CN103063460 B CN 103063460B CN 201210587985 A CN201210587985 A CN 201210587985A CN 103063460 B CN103063460 B CN 103063460B
- Authority
- CN
- China
- Prior art keywords
- side slope
- screw rod
- pedestal
- model
- testing apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention discloses flat test device and the experimental technique thereof that a kind of rock side slope destroys. The structure of testing apparatus of the present invention is, side slope model is positioned in the groove of pedestal, with screw through screw by fastening for two pieces of poly (methyl methacrylate) plates, poly (methyl methacrylate) plate lays respectively at lower end screw rod and middle screw rod and between upper end screw rod and side slope model, side slope model top is provided with cushion block. By batch making side slope model, then it is transferred in testing apparatus successively and loads. The testing apparatus structure of the present invention is simple, is applicable to the similar model of different in width and length, and strictly meets edge-restraint condition, and deceleration loading device can make full use of existing installation. Can effectively accelerate test progress, it is possible to realize the destructive process simulation of rock side slope under slope top load or gravity increasing action, it is to increase test efficiency, shortens test period.
Description
Technical field
The present invention relates to ground Experiments of Machanics technology, particularly relate to flat test device and experimental technique thereof that a kind of rock side slope destroys.
Background technology
China is the country that a landslide disaster comparatively takes place frequently, and the loss caused owing to coming down every year is huge. Along with greatly developing of China's capital construction, more and more engineering construction all can run into landslide problem. Due to the complicacy of the mechanism of coming down, physical experiments becomes a kind of important research means reproduced landslide and formed. Physical experiments is exactly take theory of similitude as theoretical basis, makes, according to similar criterion, the destructive process that side slope simulated by the side slope model with prototype proportion relation.
Existing physical experiments is generally based on areal model, but final condition is not strict, mostly adopts quasi-plane strain condition. Process of the test is fed in raw material in the testing apparatus of fixed measure, forms predetermined side slope model. Mainly it is applicable to soil-slope and large size rock side slope. Adopting in this way, the side slope model in testing apparatus loads after destroying, and could continue to feed in raw material and build next model, cause testing apparatus utilization ratio low, affect test process, limit assay number of times.
Summary of the invention
It is an object of the invention to provide flat test device and experimental technique thereof that a kind of rock side slope destroys.
This testing apparatus of the first is applicable to the rock side slope model of different model width and length, the final condition of side slope model is strictly set, make full use of existing loading equipemtn, it is possible to the simulation through process of rock side slope slip-crack surface, disclose side slope unstability rule and catastrophe mechanism.
It two is that this test method improves experiment process, it is to increase test efficiency, shortens test period.
The object of the present invention is achieved like this:
First batch making side slope model, then transfer them in testing apparatus successively and load, so that it may to accelerate test process. Adopt the length requiring testing apparatus in this way and width can regulate according to side slope moulded dimension, for side slope model provides strict edge-restraint condition. For ensureing that side slope model can be transferred to testing apparatus smoothly, not being damaged in transfer process, the method is applicable to the rock side slope model of little size. Little dimension model is conducive to saving the experiment material of model, it is possible to increase test number of times, research emphasis is conceived in the change of the crucial inducement of side slope unstability, also can reduce the cost of testing apparatus simultaneously.
1, the flat test device that rock side slope destroys
Side slope model is positioned in the groove of pedestal, left side baffle plate is fixed on pedestal, vertical with pedestal, right-hand apron is positioned on base recess, also vertical with pedestal, right-hand apron can parallel left side baffle plate movable along the guide groove of pedestal, the screw rod that left side baffle plate and right-hand apron are arranged symmetrically with pedestal middle vertical plane with two rows connects, often arrange three screw rods that screw rod is included in same vertical plane, the centre of upper end screw rod and lower end screw rod adds slightly, and have screw, with screw through screw by fastening for two pieces of poly (methyl methacrylate) plates, poly (methyl methacrylate) plate lays respectively at lower end screw rod and middle screw rod and between upper end screw rod and side slope model. if deceleration loading device is servo material-testing machine, cushion block is positioned over side slope model top, testing apparatus is positioned on the bearing plate of servo material-testing machine. if deceleration loading device is geotechnique's centrifugal test machine, testing apparatus is positioned in the mold box of geotechnique's centrifugal test machine.
The loading of testing apparatus can make full use of existing installation, comprises servo material-testing machine or geotechnique's centrifugal test machine.
Further, the guide groove place of pedestal is provided with scale.
2, the flat test method that rock side slope destroys
This test method comprises following step:
(1) side slope mould is made according to the proportionlity between side slope model and prototype, by gypsum, ground barium sulfate, fine sand and water prepare side slope cast material in proportion, and the quality ratio range of each material is: gypsum 10% ~ 50%, ground barium sulfate 10% ~ 50%, fine sand 10% ~ 50%, water 10% ~ 50%. Building side slope model, adopt sheet mica, polymer flake, soap or wax pre-existing crack, simulation joint or tomography, model solidifies the rear demoulding.
(2) dried model is positioned in testing apparatus pedestal, by the nut screwing clamping on left side baffle plate and right-hand apron, then by the screw-driving on screw rod and screw rod.
(3) if rock side slope destroys under the loading action of top, simulation slope, now deceleration loading device is servo material-testing machine, cushion block is positioned over side slope model top, is positioned over by testing apparatus on the bearing plate of servo material-testing machine. If rock side slope destroys under simulation gravity increasing action, now deceleration loading device is geotechnique's centrifugal test machine, is positioned over by testing apparatus in the mold box of geotechnique's centrifugal test machine.
(4) start-up loading device, starts Digital Video and continuous shooting camera simultaneously. Along with the increase of load, the crackle in the body of slope starts expansion, until through, form macroscopic view slipping plane.
(5) after completing rock side slope simulation test, close deceleration loading device, close Digital Video and continuous shooting camera simultaneously.
(6) continuing to be loaded by next model, repeating step (2) ~ (5), until completing all tests.
(7) slip-crack surface expansion and through situation in the slope body in Digital Video and continuous shooting camera is analyzed, it is determined that side slope unstability rule and catastrophe mechanism.
The useful effect that the present invention has compared with background technology is:
(1) testing apparatus structure is simply novel, and cost is low.
(2) right-hand apron of testing apparatus can move along being parallel to baffle plate direction, left side, can according to side slope model length setting device length, adopt 6 screw rods fixing left side baffle plate and right-hand apron, meet the fixing requirement of normal direction displacement of model left and right side final condition.
(3) front plate of testing apparatus and backplate adopt clear perspex material to make, facilitate pick up camera and photographic camera shooting process of landslides, 4 screw rods are equipped with 8 nuts, for fixing front plate and backplate, go for different model width, make the back side, model front final condition meet the fixing requirement of normal direction displacement.
(4) scale at pedestal guide groove place can determine the side slope model length being put in experimental installation easily and quickly.
(5) testing apparatus can make full use of existing installation, comprises servo material-testing machine or geotechnique's centrifugal test machine; Under adopting servo material-testing machine can simulate top, slope loading action, rock side slope destroys; Under adopting geotechnical centrifuge can simulate gravity increasing action, rock side slope destroys.
(6) adopting pick up camera and camera record process of landslides, maximum degree eliminates the error that visual inspection brings, and can analysis design mothod process repeatedly, it is to increase the accuracy of experimental result.
(7) test method improves side slope layer during similar model test flow process, it is to increase testing apparatus utilization ratio, accelerates test process, can increase test number of times.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the right view of Fig. 1.
Embodiment
In the testing apparatus of the present invention, side slope model 1 is positioned in the groove of pedestal 2, left side baffle plate 3 is fixing on the base 2, vertical with pedestal 2, right-hand apron is positioned on pedestal 2 groove, also vertical with pedestal 2, right-hand apron 4 can parallel left side baffle plate 3 movable along the guide groove of pedestal 2, the screw rod that left side baffle plate 3 and right-hand apron 4 are arranged symmetrically with pedestal middle vertical plane with two rows connects, often arrange the screw rod 5 that screw rod is included in same vertical plane, screw rod 6 and screw rod 7, add slightly in the middle of screw rod 5 and screw rod 7, and have screw, with screw 10 through screw by fastening to poly (methyl methacrylate) plate 8 and machine sheet glass 9, poly (methyl methacrylate) plate 8 and poly (methyl methacrylate) plate 9 are positioned at screw rod 5, between screw rod 6 and screw rod 7 and side slope model 1.
As a further improvement on the present invention, the deceleration loading device of testing apparatus existing installation be can be made full use of, servo material-testing machine or geotechnique's centrifugal test machine comprised. If deceleration loading device is servo material-testing machine, cushion block 11 is positioned over side slope model 1 top, testing apparatus is positioned on the bearing plate of servo material-testing machine. If deceleration loading device is geotechnique's centrifugal test machine, testing apparatus is positioned in the mold box of geotechnique's centrifugal test machine.
As a further improvement on the present invention, the guide groove place of pedestal 2 is provided with scale.
Embodiment 1: the influence research that under the loading action of top, slope, rock side slope is destroyed by master control dip of joint
(1) certain Highway Lithological Slope, field geology prospecting shows, containing a master control joint in the body of slope, the impact that under the loading action of top, analysis slope, rock side slope is destroyed by master control dip of joint, dip of joint is changed to 90 degree from 0 degree, and inclination angle increment is 15 degree, namely gets 0 degree, 15 degree, 30 degree, 45 degree, 60 degree, 75 degree and 90 degree respectively, totally 7 kinds of schemes, often kind of scheme builds three identical models. Side slope mould is made according to the proportionlity between side slope model and prototype, by each material weight proportioning, gypsum: barite: fine sand: water=1:1:2:1 prepares side slope cast material. Build side slope model, adopt sheet mica simulation master control joint. Model solidifies the rear demoulding, then builds next model.
(2) dried side slope model 1 is positioned in the pedestal 2 of testing apparatus, by the nut screwing clamping on left side baffle plate 3 and right-hand apron 4, then the screw 10 on screw rod 5 and screw rod 7 is tightened.
(3) cushion block 11 is positioned over side slope model 1 top, testing apparatus is positioned on the bearing plate of servo material-testing machine.
(4) start servo material-testing machine, start Digital Video and continuous shooting camera simultaneously. Along with the increase of load is pushed up on slope, the crackle in the body of slope starts expansion, until through, form macroscopic view slipping plane.
(5) after completing rock side slope simulation test, close deceleration loading device, close Digital Video and continuous shooting camera simultaneously.
(6) continuing to be loaded by next model, repeating step (2) ~ (5), until completing all tests.
(7) slip-crack surface expansion and through situation in the slope body in Digital Video and continuous shooting camera is analyzed, it is determined that under the loading action of top, slope, master control dip of joint is on the impact of rock side slope unstability rule and catastrophe mechanism.
Embodiment 2: the influence research that under gravity increasing action, rock side slope is destroyed by master control dip of joint
(1) certain Highway Lithological Slope, field geology prospecting shows, containing a master control joint in the body of slope, the impact that under analysis gravity increasing action, rock side slope is destroyed by master control dip of joint, dip of joint is changed to 90 degree from 0 degree, and inclination angle increment is 15 degree, namely gets 0 degree, 15 degree, 30 degree, 45 degree, 60 degree, 75 degree and 90 degree respectively, totally 7 kinds of schemes, often kind of scheme builds three identical models. Side slope mould is made according to the proportionlity between side slope model and prototype, by each material weight proportioning, gypsum: barite: fine sand: water=1:1:2:1 prepares side slope cast material. Build side slope model, adopt sheet mica simulation master control joint. Model solidifies the rear demoulding, then builds next model.
(2) dried side slope model 1 is positioned in the pedestal 2 of testing apparatus, by the nut screwing clamping on left side baffle plate 3 and right-hand apron 4, then the screw 10 on screw rod 5 and screw rod 7 is tightened.
(3) testing apparatus is positioned in the mold box of geotechnique's centrifugal test machine.
(4) start geotechnique's centrifugal test machine, start Digital Video and continuous shooting camera simultaneously. Along with the increase of gravity, the crackle in the body of slope starts expansion, until through, form macroscopic view slipping plane.
(5) after completing rock side slope rupture test, close deceleration loading device, close Digital Video and continuous shooting camera simultaneously.
(6) continuing to be loaded by next model, repeating step (2) ~ (5), until completing all tests.
(7) slip-crack surface expansion and through situation in the slope body in Digital Video and continuous shooting camera is analyzed, it is determined that under gravity increasing action, master control dip of joint is on the impact of rock side slope unstability rule and catastrophe mechanism.
Above-mentioned embodiment is used for explaining explanation the present invention, instead of limits the invention, and in the spirit of the present invention and the protection domain of claim, any amendment the present invention made and change, all fall into protection scope of the present invention.
Claims (3)
1. the flat test device that a rock side slope destroys, it is characterized in that: side slope model (1) is positioned in the groove of pedestal (2), left side baffle plate (3) is fixed on pedestal, vertical with pedestal (2), right-hand apron is positioned on pedestal (2) groove, also vertical with pedestal (2), right-hand apron (4) parallel left side baffle plate (3) is movable along the guide groove of pedestal (2), the screw rod that left side baffle plate (3) and right-hand apron (4) are arranged symmetrically with pedestal middle vertical plane with two rows connects, often arrange the left screw rod (5) that screw rod is included in same vertical plane, middle screw rod (6) and right screw rod (7), left screw rod (5), add thick in the middle of right screw rod (7), and have screw, with screw (10) through screw by the first poly (methyl methacrylate) plate (8), 2nd poly (methyl methacrylate) plate (9) is fastening, first poly (methyl methacrylate) plate (8), 2nd poly (methyl methacrylate) plate (9) is positioned at left screw rod (5), middle screw rod (6), between right screw rod (7) and side slope model (1), side slope model (1) top is placed with cushion block (11).
2. the flat test device that rock side slope according to claim 1 destroys, it is characterised in that: the guide groove place of pedestal (2) is provided with scale.
3. the experimental technique of the flat test device that rock side slope according to claim 1 destroys, it is characterised in that comprise the steps:
The first step: make side slope mould, gypsum, ground barium sulfate, fine sand and water are prepared side slope cast material in proportion, builds side slope model, adopts sheet mica, polymer flake, soap or wax pre-existing crack, simulation joint or tomography, and side slope model solidifies the rear demoulding;
2nd step: dried side slope model is positioned in the pedestal (2) of testing apparatus, by the nut screwing clamping on left side baffle plate (3) and right-hand apron (4), then the screw (10) on left screw rod (5), right screw rod (7) is tightened;
3rd step: if rock side slope destroys under the loading action of top, simulation slope, now deceleration loading device is servo material-testing machine, cushion block (11) is positioned over side slope model (1) top, testing apparatus is positioned on the bearing plate of servo material-testing machine; If rock side slope destroys under simulation gravity increasing action, deceleration loading device is geotechnique's centrifugal test machine, is positioned over by testing apparatus in the mold box of geotechnique's centrifugal test machine;
4th step: start-up loading device, starts Digital Video and continuous shooting camera simultaneously;
5th step: after completing rock side slope rupture test, closes deceleration loading device, closes Digital Video and continuous shooting camera simultaneously;
6th step: continuing to be loaded by next side slope model, repeating the 2nd step��the 5th step, until completing all tests;
7th step: analyze slip-crack surface expansion and through situation in the slope body in Digital Video and continuous shooting camera, it is determined that rock side slope unstability rule and catastrophe mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210587985.3A CN103063460B (en) | 2012-12-29 | 2012-12-29 | The flat test device that a kind of rock side slope destroys and experimental technique thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210587985.3A CN103063460B (en) | 2012-12-29 | 2012-12-29 | The flat test device that a kind of rock side slope destroys and experimental technique thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103063460A CN103063460A (en) | 2013-04-24 |
| CN103063460B true CN103063460B (en) | 2016-06-01 |
Family
ID=48106175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210587985.3A Expired - Fee Related CN103063460B (en) | 2012-12-29 | 2012-12-29 | The flat test device that a kind of rock side slope destroys and experimental technique thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103063460B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728238B (en) * | 2013-12-31 | 2016-05-11 | 武汉理工大学 | A kind of slope stability test model for containing weak intercalated layer |
| CN104677739A (en) * | 2015-03-04 | 2015-06-03 | 东北大学 | Three-dimensional model test platform device for dual-structure soil slope failure |
| CN104751725B (en) * | 2015-04-21 | 2018-01-30 | 河海大学 | Slope and land slide teaching demonstration device and test method |
| CN106198339A (en) * | 2015-05-29 | 2016-12-07 | 长沙理工大学 | A kind of covering layer slope seepage flow characteristics considering rainfall infiltration and stability model |
| CN105842419B (en) * | 2016-03-25 | 2018-03-13 | 东北大学 | A kind of side slope model production method for reducing real structure and material property |
| CN109974593B (en) * | 2019-04-01 | 2020-09-25 | 太原理工大学 | Testing device and testing method for simulating expansion of soil body column hole |
| CN113899621B (en) * | 2021-08-27 | 2023-12-29 | 北京工业大学 | Slope stability test system with changeable rough joints and changeable joint dip angles |
| CN114578026A (en) * | 2022-05-05 | 2022-06-03 | 中国科学院地质与地球物理研究所 | Model test device and method for water-induced degradation research of rock slope |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1692602A1 (en) * | 1988-03-18 | 1991-11-23 | С.Б.Швецов и Б.А.Швецов | Hill with tramp for sliding and jumping |
| CN101738331B (en) * | 2009-12-28 | 2011-08-17 | 北京交通大学 | Tunnel construction simulation plane strain model test device |
| CN102323150B (en) * | 2011-08-10 | 2013-02-13 | 中国地质科学院地质力学研究所 | Simulated test unit and method for slope stability with faulting |
| CN103033374B (en) * | 2011-09-29 | 2015-04-15 | 同济大学 | Test device of vertical structure model of shield tunnel |
| CN202631519U (en) * | 2012-04-26 | 2012-12-26 | 上海交通大学 | Universal model tank device for rainfall landslide tests |
| CN103728147B (en) * | 2013-12-06 | 2016-06-08 | 中国矿业大学(北京) | The comprehensive wall top coal that lengthens of tilt adjustable releases three-dimensional simulation experimental provision and method |
-
2012
- 2012-12-29 CN CN201210587985.3A patent/CN103063460B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN103063460A (en) | 2013-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103063460B (en) | The flat test device that a kind of rock side slope destroys and experimental technique thereof | |
| Jin et al. | Influence of single flaw on the failure process and energy mechanics of rock-like material | |
| Zhao et al. | Cracking processes and coalescence modes in rock-like specimens with two parallel pre-existing cracks | |
| Mridha et al. | Experimental investigation on nonlinear dynamic response of concrete gravity dam-reservoir system | |
| CN103439190B (en) | Paving steel bridge deck cracking resistance evaluation experimental device | |
| Ghazvinian et al. | A study of the failure mechanism of planar non-persistent open joints using PFC2D | |
| Qian et al. | Characterization of geogrid reinforced ballast behavior at different levels of degradation through triaxial shear strength test and discrete element modeling | |
| Sarfarazi et al. | Numerical simulation of the process of fracture of echelon rock joints | |
| Saadat et al. | A cohesive discrete element based approach to characterizing the shear behavior of cohesive soil and clay-infilled rock joints | |
| Jiang et al. | Simulation of cracking near a large underground cavern in a discontinuous rock mass using the expanded distinct element method | |
| Corti et al. | Lithospheric-scale centrifuge models of pull-apart basins | |
| Zhang et al. | Impacts of air-void structures on the rutting tests of asphalt concrete based on discretized emulation | |
| CN109033537B (en) | Calculation method and system for numerical simulation in rock-fill concrete pouring process | |
| CN102564855B (en) | Numerical method for graded crushed stone dynamic triaxial test | |
| CN203025185U (en) | Foundation pit model test device | |
| CN101930686A (en) | Simulation experiment push plate for simulating fault in geological structure | |
| CN102222126B (en) | Method for simulating numerical value of graded crushed stone tri-axial test | |
| CN103575644B (en) | Coupling casting concrete surface of contact test method of friction coefficient | |
| Khattak et al. | Imaged-based discrete element modeling of hot mix asphalt mixtures | |
| CN106124268A (en) | Similarity simulation experiment test block prepressing device and the method making experiment test block with it | |
| CN110736821A (en) | Model test device of landslide area pipeline safety based on gravity loading material | |
| CN110736820B (en) | Model test device of landslide area pipeline security | |
| CN110686980B (en) | Tunnel excavation analogue means under inhomogeneous side direction load | |
| CN104048870A (en) | Anti-settlement meter of structural surface test sample in direct shear test | |
| CN107515097A (en) | Anchoring system horizontal rigidity tests multidirectional hierarchical loading device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160601 Termination date: 20161229 |