CN102749251A - Testing apparatus and research method based on discrete particle gravel cushion damage mode - Google Patents
Testing apparatus and research method based on discrete particle gravel cushion damage mode Download PDFInfo
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- CN102749251A CN102749251A CN2012102566397A CN201210256639A CN102749251A CN 102749251 A CN102749251 A CN 102749251A CN 2012102566397 A CN2012102566397 A CN 2012102566397A CN 201210256639 A CN201210256639 A CN 201210256639A CN 102749251 A CN102749251 A CN 102749251A
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Abstract
The invention discloses a testing apparatus based on a discrete particle gravel cushion damage mode. The testing apparatus comprises a mold case, a mold pile, a gravel cushion, sandy soil, a displacement measuring dial indicator, a steel plate bearing platform, a loading device and a high resolution digital camera which is used for shooting a gravel cushion image, wherein the mold case is a case body which is open at the upper part; the front face of the case body is a transparent toughened glass; the mold pile is placed in the case body; the sandy soil is arranged in the case body; the height of the sandy soil is that of the top of the mold pile; the gravel cushion is arranged above the sandy soil; the thickness of the gravel cushion is two times larger than the diameter of the mold pile; the steel plate bearing platform is arranged above the gravel cushion; and the loading device and the high resolution digital camera are arranged on the steel plate bearing platform. The invention further discloses a research method based on the discrete particle gravel cushion damage mode. According to the invention, the discrete particle gravel cushion damage mode is researched from a micro aspect; and it very intuitive and visual to analyze a displacement field, a strain field and a shearing zone of gravel cushion particles by using a digital camera measurement technology.
Description
Technical field
The present invention relates to researching and analysing of discrete particle system, particularly a kind of test unit and research method based on discrete particle blotter failure mode.
Background technology
Research blotter failure mode focuses on the macromechanics aspect both at home and abroad at present, and the research of microcosmic aspect is in the shortcoming state.The research of conventional cushion damage layer pattern needs at the bottom of the certain mathematical mechanical work and some spatial thought imagination from the mechanical mechanism aspect, and therefore image is concrete inadequately.And study discrete particle blotter failure mode from the microcosmic aspect, and utilize the Digital photographic measurement technology to analyze displacement field, strain field and the shear zone of bed course particle, very therefore visual pattern has very important learning value.This is a kind of innovation that the model study of conventional cushion damage layer is proposed, for having opened up a frontier in bed course research aspect.
Summary of the invention
The objective of the invention is provides a kind of test unit based on discrete particle blotter failure mode in order to overcome the deficiency of prior art.
Another object of the present invention provides a kind of based on discrete particle blotter failure Model Research method.
The technical scheme that the present invention adopts is: a kind of test unit based on discrete particle blotter failure mode; Comprise the high-resolution digital camera that model casing, Model Pile, blotter, sand, displacement measure dial gauge, steel plate cushion cap, charger and be used to take the blotter picture; Said model casing is the upper opening casing, and the casing front is a transparent toughened glass, is placed with Model Pile in the casing; Be provided with sand in the casing; The height of sand is provided with blotter for the height on Model Pile stake top above the sand, the thickness of blotter is the twice of Model Pile diameter; Be provided with the steel plate cushion cap above the blotter, the steel plate cushion cap is provided with charger and displacement measures dial gauge.
As preferably, said Model Pile Model Pile adopts solid half module stake.
As preferably, said charger is lifting jack and reaction frame.
A kind of adopt above-mentioned test unit based on discrete particle blotter failure Model Research method, may further comprise the steps:
(1) Model Pile is placed into presses close to transparent toughened glass in the model casing, when the sample preparation of knockout soil is to position, Model Pile stake top in the model casing, stop knockout, and with the upper surface leveling of sand;
(2) lay the blotter sample preparation of handling through speckle on Model Pile stake top, the blotter laying depth is the twice of Model Pile diameter, leveling blotter surface;
(3) arrange steel plate cushion cap and charger then successively, use hydraulic oil pound control loaded device, set up displacement on the steel plate cushion cap and survey dial gauge measurement load deflection;
(4) set up high-resolution digital camera before the transparent toughened glass; Blotter particle in the loading procedure is followed the trail of shooting; Utilize the test of image relevant treatment software analysis to take pictures, the blotter particle is carried out deformation measurement and explanation, analyze the bed course failure mode.
Beneficial effect: bed course failure Model Research method of the present invention comprises test unit; The thin image capturing method of seeing; The thin bed course analytical approach of seeing is studied discrete particle blotter failure mode from the microcosmic aspect, utilize the Digital photographic measurement technology to analyze displacement field, strain field and the shear zone of bed course particle; Very therefore visual pattern has very important learning value.This is a kind of innovation that the model study of conventional cushion damage layer is proposed, for having opened up a frontier in bed course research aspect.
Description of drawings
Fig. 1 is a test unit structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
As shown in Figure 1; A kind of test unit based on discrete particle blotter failure mode comprises the high-resolution digital camera that model casing, Model Pile 1, blotter 2, sand 3, displacement measure dial gauge 4, steel plate cushion cap 6, charger and be used to take the blotter picture, and said model casing is the upper opening casing; The casing front is a transparent toughened glass; Be placed with Model Pile 1 in the casing, be provided with sand 3 in the casing, the height of sand 3 is the height on 1 top of Model Pile; Be provided with blotter 2 above the sand 3; The thickness of blotter 2 is the twice of Model Pile 1 diameter, is provided with steel plate cushion cap 6 above the blotter 2, and steel plate cushion cap 6 is provided with charger and displacement measures dial gauge 4.
The present invention uses indoor model test, and test model case front is the thick transparent toughened glass of 20mm, and all the other are the steel plate behind the 10mm on four sides.Test loads uses lifting jack 5 and reaction frame 7, and casing top is provided with reaction frame 7, is used for fixing loading facilities.Model Pile 1 adopts solid half module stake, and blotter 2 adopts graded broken stone, covers the steel plate cushion cap on the blotter 2, transmits load through steel plate cushion cap 6 during pressurization.
A kind of adopt above-mentioned test unit based on discrete particle blotter failure Model Research method, may further comprise the steps:
(1) Model Pile is placed into presses close to transparent toughened glass in the model casing, when the sample preparation of knockout soil is to position, Model Pile stake top in the model casing, stop knockout, and with the upper surface leveling of sand;
(2) lay the blotter sample preparation of handling through speckle on Model Pile stake top, the blotter laying depth is the twice of Model Pile diameter, leveling blotter surface;
(3) arrange steel plate cushion cap and charger then successively, use hydraulic oil pound control loaded device, set up displacement on the steel plate cushion cap and survey dial gauge measurement load deflection;
(4) set up high-resolution digital camera before the transparent toughened glass; Blotter particle in the loading procedure is followed the trail of shooting; Utilize the test of image relevant treatment software analysis to take pictures, the blotter particle is carried out deformation measurement and explanation, analyze the bed course failure mode.
Bed course of the present invention is carefully seen image capturing method: adopt the anti-D700 digital camera of Nikon list (the image ultimate resolution is 4256 * 2832) shooting of 1210 universal effect pixels, 5 Zoom Lens to obtain the bed course picture.In general, the resolution of image is high more, and the minimal deformation precision that can discern is high more, thereby can catch the variation of bed course particle micro displacement.The precision that this shooting can reach is about the auxiliary picture pick-up device of 0.1mm/pixel. has cold light lamp, tripod, telepilot.The light of each photo can not have too big variation in the process of the test, and the position of camera and light should keep fixing and can not rock in entire test.
Thin sight bed course grain size analysis method of the present invention: adopt no punctuation Digital photographic,, utilize the image correlation analysis, the bed course particle is carried out deformation measurement and explanation, analyze the bed course failure mode to bed course particle dyeing system spot.
Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.The all available prior art of each ingredient not clear and definite in the present embodiment realizes.
Claims (4)
1. test unit based on discrete particle blotter failure mode; It is characterized in that: comprise the high-resolution digital camera that model casing, Model Pile, blotter, sand, displacement measure dial gauge, steel plate cushion cap, charger and be used to take the blotter picture; Said model casing is the upper opening casing, and the casing front is a transparent toughened glass, is placed with Model Pile in the casing; Be provided with sand in the casing; The height of sand is provided with blotter for the height on Model Pile stake top above the sand, the thickness of blotter is the twice of Model Pile diameter; Be provided with the steel plate cushion cap above the blotter, the steel plate cushion cap is provided with charger and displacement measures dial gauge.
2. a kind of test unit based on discrete particle blotter failure mode according to claim 1 is characterized in that: said Model Pile Model Pile adopts solid half module stake.
3. a kind of test unit based on discrete particle blotter failure mode according to claim 1 is characterized in that: said charger is lifting jack and reaction frame.
One kind adopt claim 1 test unit based on discrete particle blotter failure Model Research method, it is characterized in that: may further comprise the steps:
(1) Model Pile is placed into presses close to transparent toughened glass in the model casing, when the sample preparation of knockout soil is to position, Model Pile stake top in the model casing, stop knockout, and with the upper surface leveling of sand;
(2) lay the blotter sample preparation of handling through speckle on Model Pile stake top, the blotter laying depth is the twice of Model Pile diameter, leveling blotter surface;
(3) arrange steel plate cushion cap and charger then successively, use hydraulic oil pound control loaded device, set up displacement on the steel plate cushion cap and survey dial gauge measurement load deflection;
(4) set up high-resolution digital camera before the transparent toughened glass; Blotter particle in the loading procedure is followed the trail of shooting; Utilize the test of image relevant treatment software analysis to take pictures, the blotter particle is carried out deformation measurement and explanation, analyze the bed course failure mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210256639.7A CN102749251B (en) | 2012-07-24 | 2012-07-24 | Testing apparatus and research method based on discrete particle gravel cushion damage mode |
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| CN201210256639.7A CN102749251B (en) | 2012-07-24 | 2012-07-24 | Testing apparatus and research method based on discrete particle gravel cushion damage mode |
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| CN102749251A true CN102749251A (en) | 2012-10-24 |
| CN102749251B CN102749251B (en) | 2014-04-02 |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103377306A (en) * | 2012-04-27 | 2013-10-30 | 利弗莫尔软件技术公司 | Systems and methods for providing a bonded-particle model in computer aided engineering analysis |
| CN103604617A (en) * | 2013-11-08 | 2014-02-26 | 河海大学 | Test platform of rock-fill dam mask impervious structure model on deep overburden layer |
| CN104091009A (en) * | 2014-07-01 | 2014-10-08 | 东南大学 | Coupling calculation method based on granular flow and finite difference method |
| CN104153404A (en) * | 2014-08-28 | 2014-11-19 | 东南大学 | Testing device and testing method of pile composite foundation combined with broken stone hardcore foundation |
| CN104596868A (en) * | 2015-01-30 | 2015-05-06 | 北京交通大学 | Axis shifting type ballast direct shearing instrument |
| CN104848838A (en) * | 2015-04-29 | 2015-08-19 | 辽宁工程技术大学 | Method for observing rock and soil sample shear band inclination angle evolution rules under two types of formation conditions |
| CN105842094A (en) * | 2016-05-12 | 2016-08-10 | 扬州大学 | Pile box foundation level cyclic load shear deformation testing device |
| CN106226112A (en) * | 2016-09-21 | 2016-12-14 | 中南大学 | A kind of multi-functional reduced scale tunnel structure force model response characteristic laboratory test system and method |
| CN106323766A (en) * | 2016-09-28 | 2017-01-11 | 同济大学 | Method for observing shear properties of contact surface between sandy soil and structure |
| CN106872290A (en) * | 2017-01-24 | 2017-06-20 | 扬州大学 | A kind of improvement direct shear apparatus and method for determining soil body shear band development trend |
| CN108301447A (en) * | 2018-04-08 | 2018-07-20 | 山东建筑大学 | Dispersed pressure anchor anchor mechanism visible model testing device and test method |
| CN108593428A (en) * | 2018-04-24 | 2018-09-28 | 重庆大学 | A kind of discrete material Particle Breakage test device and test method |
| CN111077027A (en) * | 2019-12-13 | 2020-04-28 | 天津大学 | Method for determining shear strength of calcareous sand under high stress |
| CN114324076A (en) * | 2022-03-10 | 2022-04-12 | 西南交通大学 | Grading rubble basic unit granule migration measuring device that permeates water |
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| CN102095650A (en) * | 2011-01-21 | 2011-06-15 | 中国科学院地质与地球物理研究所 | Method for testing strength of soil-rock mixture |
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2012
- 2012-07-24 CN CN201210256639.7A patent/CN102749251B/en not_active Expired - Fee Related
Patent Citations (1)
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| CN102095650A (en) * | 2011-01-21 | 2011-06-15 | 中国科学院地质与地球物理研究所 | Method for testing strength of soil-rock mixture |
Non-Patent Citations (1)
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| 王仙芝 等: "散体材料桩复合地基室内模型试验研究", 《岩土工程界》 * |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103377306A (en) * | 2012-04-27 | 2013-10-30 | 利弗莫尔软件技术公司 | Systems and methods for providing a bonded-particle model in computer aided engineering analysis |
| CN103377306B (en) * | 2012-04-27 | 2017-05-31 | 利弗莫尔软件技术公司 | The system and method that particle link model is provided in computer-aided engineering analysis |
| CN103604617A (en) * | 2013-11-08 | 2014-02-26 | 河海大学 | Test platform of rock-fill dam mask impervious structure model on deep overburden layer |
| CN103604617B (en) * | 2013-11-08 | 2016-07-06 | 河海大学 | Rock-fill dams facial film leakage preventing structure model test platform on a kind of deeply covered layer |
| CN104091009A (en) * | 2014-07-01 | 2014-10-08 | 东南大学 | Coupling calculation method based on granular flow and finite difference method |
| CN104091009B (en) * | 2014-07-01 | 2017-04-05 | 东南大学 | Particle stream and finite difference calculus coupling calculation |
| CN104153404A (en) * | 2014-08-28 | 2014-11-19 | 东南大学 | Testing device and testing method of pile composite foundation combined with broken stone hardcore foundation |
| CN104596868B (en) * | 2015-01-30 | 2017-03-01 | 北京交通大学 | A kind of shift shaft type rubble railway ballast direct shear apparatus |
| CN104596868A (en) * | 2015-01-30 | 2015-05-06 | 北京交通大学 | Axis shifting type ballast direct shearing instrument |
| CN104848838A (en) * | 2015-04-29 | 2015-08-19 | 辽宁工程技术大学 | Method for observing rock and soil sample shear band inclination angle evolution rules under two types of formation conditions |
| CN104848838B (en) * | 2015-04-29 | 2017-11-03 | 辽宁工程技术大学 | Ground sample shear band inclination development law observation procedure under the conditions of two kinds of configurations |
| CN105842094A (en) * | 2016-05-12 | 2016-08-10 | 扬州大学 | Pile box foundation level cyclic load shear deformation testing device |
| CN106226112A (en) * | 2016-09-21 | 2016-12-14 | 中南大学 | A kind of multi-functional reduced scale tunnel structure force model response characteristic laboratory test system and method |
| CN106323766A (en) * | 2016-09-28 | 2017-01-11 | 同济大学 | Method for observing shear properties of contact surface between sandy soil and structure |
| CN106323766B (en) * | 2016-09-28 | 2018-10-26 | 同济大学 | A kind of observation procedure of sand and structure interface shear property |
| CN106872290A (en) * | 2017-01-24 | 2017-06-20 | 扬州大学 | A kind of improvement direct shear apparatus and method for determining soil body shear band development trend |
| CN106872290B (en) * | 2017-01-24 | 2019-05-07 | 扬州大学 | A kind of improvement direct shear apparatus and method measuring soil body shear band development trend |
| CN108301447A (en) * | 2018-04-08 | 2018-07-20 | 山东建筑大学 | Dispersed pressure anchor anchor mechanism visible model testing device and test method |
| CN108593428A (en) * | 2018-04-24 | 2018-09-28 | 重庆大学 | A kind of discrete material Particle Breakage test device and test method |
| CN111077027A (en) * | 2019-12-13 | 2020-04-28 | 天津大学 | Method for determining shear strength of calcareous sand under high stress |
| CN111077027B (en) * | 2019-12-13 | 2022-04-29 | 天津大学 | Method for determining shear strength of calcareous sand under high stress |
| CN114324076A (en) * | 2022-03-10 | 2022-04-12 | 西南交通大学 | Grading rubble basic unit granule migration measuring device that permeates water |
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| CN102749251B (en) | 2014-04-02 |
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