CN103234822A - Model test apparatus and method for geotechnical engineering soil cracking damage - Google Patents
Model test apparatus and method for geotechnical engineering soil cracking damage Download PDFInfo
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- CN103234822A CN103234822A CN201310103152XA CN201310103152A CN103234822A CN 103234822 A CN103234822 A CN 103234822A CN 201310103152X A CN201310103152X A CN 201310103152XA CN 201310103152 A CN201310103152 A CN 201310103152A CN 103234822 A CN103234822 A CN 103234822A
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Abstract
The invention discloses a model test apparatus for geotechnical engineering soil cracking damage. The model test apparatus comprises an upper layer steel frame, a lower layer steel frame, a bottom plate, a lifter and a model base, wherein the model base is connected with the bottom plate through the lifter, the bottom plate is provided with a support rod, the support rod is provided with a retractable rotation rod, the retractable rotation rod is provided with a digital camera, the lower layer steel frame is respectively connected with the upper layer steel frame and the bottom plate, the upper layer steel frame is provided with a visualization glass plate, the upper surface of the bottom plate, the upper layer steel frame and the lower layer steel frame form a hollow cavity, thermal insulation plates are arranged on the inner sides of the upper layer steel frame and the lower layer steel frame, thermal insulation support ceramics are arranged on the inner sides of the thermal insulation plates, a height of the thermal insulation support ceramic is less than a height of the thermal insulation plate, a stratum thermal insulation plate is arranged on the bottom plate, a heating plate is arranged on the stratum thermal insulation plate, a temperature sensor is arranged inside an inner chamber formed by the upper portion of the heating plate and the thermal insulation support ceramic, and a glass-made paraffin groove is arranged on the upper portion of the thermal insulation support ceramic. According to the present invention, test accuracy is effectively improved, test efficiency is enhanced, and test operation is convenient.
Description
Technical field
The present invention relates to ground experimental technique field, relate in particular to a kind of model test apparatus and method for Geotechnical Engineering soil be full of cracks destruction.
Background technology
The soil cracking test refers to that the soil body is subjected to change of external conditions, when swelling as pulling force, is subjected to symmetry equivalent tension force around the soil body, makes the soil body itself that a kind of test of cracking take place.After the soil stress changes, can produce breakoff phenomenons such as a series of be full of cracks fractures, by the failure law of understanding soil under different stress condition influences that can be more deep to the research of soil be full of cracks model test, and be that stressed variation research on the face of land is offered reference under the tectonic movement.
Paraffin is a kind of strange class wax that extracts from some distillate of oil, oil shale fuel or other pitch mineral oil, be white or faint yellow translucency, has quite significantly crystal structure, being good insulator, also is good heat accumulating, and fusing point is about 60 ℃, has thermal expansivity preferably, very suitable expanding material as soil testing, and fusing point is low, and cleaning is convenient.
Prior art is ripe not enough to the research of soil cracking test, the equipment that adopts, simple as the cracking test instrument, fixed size, inefficiency, particularly when needs carry out organizing contrast test more, because complicated operation, cause inefficiency, simultaneously because crack performance also is to realize by sheet material jack-up, homogeneity and accuracy are difficult to guarantee that the observation method aspect is fairly simple, are generally naked eyes or gage and measure, the precision of test can't reach requirement, and these devices are difficult to satisfy the test demand of current Geotechnical Engineering.
Summary of the invention
The present invention is in order to solve the prior art above shortcomings; A kind of model test apparatus and method for Geotechnical Engineering soil be full of cracks destruction is provided; Effectively improve test accuracy and test efficiency, make things convenient for test operation.
The present invention also provides a kind of model test method for Geotechnical Engineering soil be full of cracks destruction.
The objective of the invention is to adopt following technical proposals to realize:
A kind of model test apparatus for Geotechnical Engineering soil be full of cracks destruction, comprise upper strata steelframe, lower floor's steelframe, base plate, lifter, model base, model base is connected with base plate by lifter, base plate is provided with support bar, support bar is provided with scalable swingle, scalable swingle is provided with digital camera, and lower floor's steelframe is connected with base plate respectively with the upper strata steelframe respectively, and the upper strata steelframe is provided with visual glass plate; Form cavity with upper strata steelframe, lower floor's steelframe above the base plate, the inboard of upper strata steelframe, lower floor's steelframe is provided with thermal insulation board, the thermal insulation board inboard is provided with heat insulation support pottery, heat insulation support pottery height is less than the thermal insulation board height, be provided with the stratum thermal insulation board above the base plate, the stratum thermal insulation board is provided with heating plate, and heating plate top and heat insulation the support in the ceramic inner chamber that forms are provided with temperature sensor, and heat insulation support pottery top is provided with glass paraffin tank processed.
Model base is provided with temperature adjusting switch, stand direction switch, and described stand direction switch links to each other with the actuating unit of lifter, and the height of control lifter is convenient to test and is observed; The temperature adjusting switch is connected with top temperature control equipment, temperature sensor by circuit, the variation of control test temperature.
The model base bottom is provided with rotation roller.
Last steelframe is provided with connecting hole with following steelframe, and last steelframe is connected with bolt by connecting hole with following steelframe.
Last steelframe and following steelframe are connected and composed by four fabric parts respectively, are respectively equipped with a plurality of connecting holes on the four fabric parts, and four fabric parts are " windmill " shape, and to pass through connecting hole end to end, are fixed on the base plate with screw after adjusting the position; Four groups of lifters link to each other with base plate, and the lower end is fixed on the model base, but the free adjustment height; Laying temperature regulating switch and stand direction switch on the model base, bottom arrangement group rotation roller, removable position; Last steelframe and following steelframe around inner thermal insulation board is close to, the heat insulation support pottery of inboard arrangement, glass paraffin tank processed is placed in heat insulation support pottery top, below placement heating plate, middle laying temperature sensor, the thermal insulation board below is laid thermal insulation board and is close to base plate.
Lower floor's steelframe, base plate are connected with bolt by connecting hole.
A kind of test method of utilizing the model test apparatus of Geotechnical Engineering soil be full of cracks destruction may further comprise the steps:
1) determine soil body size, adjust length and the width of upper strata steelframe, lower floor's steelframe, base plate is fixed in screw in the back of adjusting to the right place, regulates the stand direction switch, lifter is moved up and down, and adjusts the height of base plate, reaches suitable state;
(2) according to soil body size, in steel tank, lay inner thermal insulation board, stratum thermal insulation board, inboard heat insulation support pottery and the heating plate placed of inner thermal insulation board is placed in heat insulation support pottery top, the middle temperature sensor of settling with the glass guide channel of filling paraffin;
(3) soil body is inserted in the upper strata steelframe with visual glass of steel tank top, soil layer four sides and glass plate contact portion stick with glue and connect fixingly, prevent that the soil body from rising overally; Soil layer and below paraffin separate with flexible plastic film, guarantee that paraffin and soil layer do not influence each other.
(4) regulate the temperature adjusting switch, start heating plate, guarantee that by the temperature variation of controlling temperature sensor the constant temperature of paraffin evenly heats.;
(5) regulate scalable swingle and digital camera is placed on the position that needs monitoring, the record soil body is chapped and is pushed up the change procedure that splits;
After the off-test, the cleaning instrument has changed moulded dimension thereby regulate the steelframe relative position, and reform paraffin tank and heating plate repeat above operation and test.
Beneficial effect of the present invention:
1 model support size can freely be adjusted according to the test needs, realizes " using one " more, has avoided carrying out a large amount of loaded down with trivial details operations and the replacing of test-bed because of contrast test, has improved test efficiency, economizes on resources;
The 2 test soil bodys surround with glass plate can observe the overall process that be full of cracks is split on soil body top from the side, more directly perceived;
3 digital cameras record the overall process that the soil body changes subtly, accurately measure protuberance displacement and fracture width after the soil body chaps, compare with gage and visual inspection in the past, have improved test accuracy;
The method that adds hot-air indirect thermal conduction paraffin under the heat insulation environment of 4 sealings has guaranteed that to the full extent the even constant temperature of paraffin is heated, the arrangement of temperature sensor makes the controllable joint of expansion temperature, the even expansion of paraffin has guaranteed the even protuberance of the top soil body, the accurately be full of cracks behavior of the simulation soil body, test accuracy height.
Description of drawings
Fig. 1 is structural representation of the present invention
Fig. 2 is the design of part synoptic diagram of the cavity inside that forms with upper strata steelframe, lower floor steelframe above the base plate;
1 scalable swingle wherein; 2 digital cameras; 3 visual glass plates; 4 upper strata steelframes; 5 lower floor's steelframes; 6 base plates; 7 lifters; 8 model base; 9 temperature adjusting switches; 10 stand direction switches; 11 rotation rollers; 12 glass paraffin tank processed; 13 thermal insulation boards; 14 heat insulation support potteries; 15 heating plates; 16 stratum thermal insulation boards; 17 temperature sensors; 18 support bars.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
A kind of model test apparatus for Geotechnical Engineering soil be full of cracks destruction, comprise upper strata steelframe 4, lower floor's steelframe 5, base plate 6, lifter 7, model base 8 with threaded hole, model base 8 is connected with base plate 6 by lifter 7, base plate 6 is provided with support bar 18, support bar 18 is provided with scalable swingle 1, scalable swingle 1 is provided with digital camera 2, lower floor's steelframe 5 respectively with upper strata steelframe 4, and the base plate 6 of bottom be connected, upper strata steelframe 4 is provided with visual glass plate 3; Form cavity with upper strata steelframe 4, lower floor's steelframe 5 above the base plate 6, the inboard of upper strata steelframe 4, lower floor's steelframe 5 is provided with thermal insulation board 13, thermal insulation board 13 inboards are provided with heat insulation support pottery 14, heat insulation support pottery 14 height are less than thermal insulation board 13 height, be provided with stratum thermal insulation board 16 above the base plate 6, stratum thermal insulation board 16 is provided with heating plate 15, and heating plate 15 tops and heat insulation the support in ceramic 14 inner chambers that form are provided with temperature sensor 17, and ceramic 14 tops of heat insulation support are provided with glass paraffin tank 12 processed.
Settle four lifting jack lifters 7 on the model base 8, model base 8 is provided with temperature adjusting switch 9, stand direction switch 10, and described stand direction switch 10 links to each other with the actuating unit of lifter 7, and the height of control lifter is convenient to test and is observed; Temperature adjusting switch 9 is connected with top temperature control equipment, temperature sensor 17 by circuit, the variation of control test temperature.
Model base 8 bottoms are provided with rotation roller 11.
Last steelframe 4 is provided with connecting hole with following steelframe 5, and last steelframe 4 is connected with bolt by connecting hole with following steelframe 5.
Last steelframe 4 is connected and composed by four fabric parts respectively with following steelframe 5, is respectively equipped with a plurality of connecting holes on the four fabric parts, and four fabric parts are " windmill " shape, and to pass through connecting hole end to end, is fixed on the base plate 6 with screw after adjusting the position; Four groups of lifters 7 link to each other with base plate 6, and the lower end is fixed on the model base 8, but the free adjustment height; Laying temperature regulating switch 9 and stand direction switch 10 on the model base 8,4 groups of rotation rollers 11, removable position are settled in the bottom; Last steelframe 4 around inner thermal insulation board 13 is close to, following steelframe 5, inboard heat insulation support pottery 14, heat insulation support ceramic 14 tops placement glass paraffin tank 12 processed, the below placement heating plate 15 settled, middle laying temperature sensor 17, thermal insulation board below are laid thermal insulation board 16 and are close to base plate 6.
Lower floor's steelframe 5, base plate 6 are connected with bolt by connecting hole.
The test method of the model test apparatus that field Geotechnical Engineering soil be full of cracks destroys may further comprise the steps:
1) determine soil body size, adjust length and the width of upper strata steelframe 4, lower floor's steelframe 5, base plate 6 is fixed in screw in the back of adjusting to the right place, regulates stand direction switch 10, lifter 7 is moved up and down, and suitably adjusts the height of base plate 6, reaches suitable state;
(2) according to soil body size, in steel tank, lay inner thermal insulation board 13, stratum thermal insulation board 16, inner thermal insulation board 13 inboard heat insulation support pottery 14 and the heating plates 15 placed are placed in ceramic 14 tops of heat insulation support with the glass of filling paraffin paraffin tank 12 processed, the middle temperature sensor 17 of settling;
(3) soil body is inserted in the upper strata steelframe 4 with visual glass of steel tank top, soil layer four sides and glass plate contact portion stick with glue and connect fixingly, prevent that the soil body from rising overally; Soil layer and below paraffin separate with flexible plastic film, guarantee that paraffin and soil layer do not influence each other.
(4) regulate temperature adjusting switch 9, start heating plate 15, guarantee that by the temperature variation of controlling temperature sensor 17 constant temperature of paraffin evenly heats.;
(5) regulate scalable swingle 1 and digital camera is placed on the position that needs monitoring, the record soil body is chapped and is pushed up the change procedure that splits;
After the off-test, the cleaning instrument has changed moulded dimension thereby regulate the steelframe relative position, and reform paraffin tank and heating plate repeat above operation and test.
Though above-mentioned by reference to the accompanying drawings to the invention embodiment be described; but be not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (7)
1. one kind is used for the model test apparatus that the be full of cracks of Geotechnical Engineering soil destroys, it is characterized in that, comprise upper strata steelframe, lower floor's steelframe, base plate, lifter, model base, model base is connected with base plate by lifter, base plate is provided with support bar, and support bar is provided with scalable swingle, and scalable swingle is provided with digital camera, lower floor's steelframe is connected with base plate respectively with the upper strata steelframe respectively, and the upper strata steelframe is provided with visual glass plate; Form cavity with upper strata steelframe, lower floor's steelframe above the base plate, the inboard of upper strata steelframe, lower floor's steelframe is provided with thermal insulation board, the thermal insulation board inboard is provided with heat insulation support pottery, heat insulation support pottery height is less than the thermal insulation board height is arranged, be provided with the stratum thermal insulation board above the base plate, the stratum thermal insulation board is provided with heating plate, and heating plate top and heat insulation the support in the ceramic inner chamber that forms are provided with temperature sensor, and heat insulation support pottery top is provided with glass paraffin tank processed.
2. the model test apparatus that destroys for Geotechnical Engineering soil be full of cracks as claimed in claim 1, it is characterized in that, four lifting jack lifters are set on the described model base, model base is provided with temperature adjusting switch, stand direction switch, the stand direction switch is connected with the actuating unit of lifter, and the temperature adjusting switch is connected with temperature control equipment, temperature sensor by circuit.
3. the model test apparatus for Geotechnical Engineering soil be full of cracks destruction as claimed in claim 1 is characterized in that, described model base bottom is provided with rotation roller.
4. the model test apparatus for Geotechnical Engineering soil be full of cracks destruction as claimed in claim 1 is characterized in that, the described steelframe of going up is provided with connecting hole with following steelframe, and last steelframe is connected with bolt by connecting hole with following steelframe; Lower floor's steelframe, base plate are connected with bolt by connecting hole.
5. the model test apparatus that destroys for Geotechnical Engineering soil be full of cracks as claimed in claim 1, it is characterized in that, the described steelframe of going up is connected and composed by four fabric parts respectively with following steelframe, is respectively equipped with a plurality of connecting holes on the four fabric parts, and four fabric parts connect by connecting hole.
6. the model test apparatus for Geotechnical Engineering soil be full of cracks destruction as claimed in claim 1 is characterized in that described lifter is provided with four groups.
7. utilize the test method of each described device of claim 1 to 6, it is characterized in that, may further comprise the steps:
1) determine soil body size, adjust length and the width of upper strata steelframe, lower floor's steelframe, the back of adjusting to the right place is fixed with screw and base plate, regulates the stand direction switch, lifter is moved up and down, and adjusts the height of base plate, reaches suitable state;
(2) according to soil body size, in steel tank, lay inner thermal insulation board, stratum thermal insulation board, inboard heat insulation support pottery and the heating plate placed of inner thermal insulation board is placed in heat insulation support pottery top, the middle temperature sensor of settling with the glass of filling paraffin paraffin tank processed;
(3) soil body is inserted in the upper strata steelframe with visual glass of steel tank top, soil layer four sides and glass plate contact portion stick with glue and connect fixingly, prevent that the soil body from rising overally; Soil layer and below paraffin separate with flexible plastic film.
(4) regulate the temperature adjusting switch, start heating plate, guarantee that by the temperature variation of controlling temperature sensor the constant temperature of paraffin evenly heats;
(5) regulate scalable swingle and digital camera is placed on the position that needs monitoring, the record soil body is chapped and is pushed up the change procedure that splits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310103152.XA CN103234822B (en) | 2013-03-27 | 2013-03-27 | Model test apparatus and method for geotechnical engineering soil cracking damage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310103152.XA CN103234822B (en) | 2013-03-27 | 2013-03-27 | Model test apparatus and method for geotechnical engineering soil cracking damage |
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| Publication Number | Publication Date |
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| CN103234822A true CN103234822A (en) | 2013-08-07 |
| CN103234822B CN103234822B (en) | 2015-04-22 |
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| CN201310103152.XA Expired - Fee Related CN103234822B (en) | 2013-03-27 | 2013-03-27 | Model test apparatus and method for geotechnical engineering soil cracking damage |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031607A (en) * | 2019-04-11 | 2019-07-19 | 南昌大学 | The experimental rig that a kind of crack progressing and preferential stream are formed |
| CN112304743A (en) * | 2020-11-19 | 2021-02-02 | 绍兴文理学院 | Solid spherical shell cracking simulation test device |
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| US20050191758A1 (en) * | 2002-08-26 | 2005-09-01 | John Pether | Soil test box |
| CN102175516A (en) * | 2011-02-16 | 2011-09-07 | 山东大学 | Large-scale combined dynamic and static multifunctional geotechnical engineering simulation test device |
| CN102401778A (en) * | 2011-04-20 | 2012-04-04 | 河海大学 | Device and method for measuring swelling representation parameters of swelling soil |
| CN203164058U (en) * | 2013-03-27 | 2013-08-28 | 山东大学 | Model test device for soil cracking damage in geotechnical engineering |
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2013
- 2013-03-27 CN CN201310103152.XA patent/CN103234822B/en not_active Expired - Fee Related
Patent Citations (4)
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| US20050191758A1 (en) * | 2002-08-26 | 2005-09-01 | John Pether | Soil test box |
| CN102175516A (en) * | 2011-02-16 | 2011-09-07 | 山东大学 | Large-scale combined dynamic and static multifunctional geotechnical engineering simulation test device |
| CN102401778A (en) * | 2011-04-20 | 2012-04-04 | 河海大学 | Device and method for measuring swelling representation parameters of swelling soil |
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Non-Patent Citations (2)
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| 唐朝生 等: "膨胀土收缩开裂过程及其温度效应", 《岩土工程学报》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031607A (en) * | 2019-04-11 | 2019-07-19 | 南昌大学 | The experimental rig that a kind of crack progressing and preferential stream are formed |
| CN112304743A (en) * | 2020-11-19 | 2021-02-02 | 绍兴文理学院 | Solid spherical shell cracking simulation test device |
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| CN103234822B (en) | 2015-04-22 |
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