CN203849117U - Unsaturated soil side slope device for measuring soil deformation and suction - Google Patents
Unsaturated soil side slope device for measuring soil deformation and suction Download PDFInfo
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- CN203849117U CN203849117U CN201420201917.3U CN201420201917U CN203849117U CN 203849117 U CN203849117 U CN 203849117U CN 201420201917 U CN201420201917 U CN 201420201917U CN 203849117 U CN203849117 U CN 203849117U
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- side slope
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Abstract
The utility model relates to the technical field of soil engineering direct shearing devices and discloses an unsaturated soil side slope device for measuring soil deformation and suction. The unsaturated soil side slope device comprises a side slope model box, a data acquisition structure and an environment simulation structure, wherein the upper end of the side slope model box is in an inclined shape; one side wall of the side slope model box is transparent and is internally provided with a plurality of calibrating points; the environment simulation structure comprises a water spraying structure and a drying structure; the data acquisition structure comprises a camera and a suction sensor; the camera is located at the outer side of the transparent side wall; and the suction sensor is inserted into the side slope model box. Unsaturated soil is filled into a containing cavity; the water spraying structure and the drying structure are used for carrying out dry-wet circulating simulation; the camera is used for acquiring the deformation of the unsaturated soil so as to measure macro-mechanical properties; the suction sensor is used for acquiring suction data of the unsaturated soil so as to measure micromechanics properties; and the unsaturated soil side slope device has the important meanings on deep researches of natural conditions, water and soil mechanical properties of an unsaturated soil side slope, and the stability under a rainfall dry-wet cycle.
Description
Technical field
The utility model relates to the technical field of unsaturated soil body deformability and suction measurement, relates in particular to the unsaturation soil body side slope device of measuring soil deformation and suction.
Background technology
The failure mode of the soil body is mainly because shear failure causes, so the shear strength parameters of the Accurate Determining soil body is significant in Geotechnical Engineering.
In prior art, in testing laboratory, measure the shear strength parameter of the soil body, the general direct shear apparatus that adopts carries out shear test, under pressure at right angle, the soil body is applied to horizontal force to be sheared, shear stress during in the hope of damage of soil body, then determines the parameters such as shear strength parameter, angle of internal friction and cohesiveness of the soil body according to Coulomb law.
But in nature and Practical Project, the soil body running into is the unsaturation soil body normally, the theoretical research of the shearing strength of the unsaturation soil body is the history of existing nearly over half a century also.For the saturated soil body, soil strength is controlled by effective stress, and concerning the unsaturation soil body, putative matric suction is very large to the contribution of 2 distortion of the unsaturation soil body and shearing strength, the shearing strength that matric suction produces has a great impact for the stability of the unsaturation soil body, therefore, studies the matric suction variation which kind of factor affects the unsaturation soil body, and the variation of unsaturation soil body suction in shear history, there is very important meaning.
Natural soil body particulate material has dilatancy, presses the special mechanical properties such as rigid and anisotropy, and these mechanical properties are all controlled by microtexture and the evolution thereof of inside soil body, therefore, soil body macroscopic view and micro-parameter are quantized, particularly important for further investigation soil deformation mechanism and mechanical characteristic.But, now, the shear strength parameter that the conventional straight shear test of testing laboratory or other test can only be measured the soil body, namely angle of internal friction and cohesiveness, its can not Real-Time Monitoring shear history matric suction variation, can not intuitively measure near the displacement of the soil body of shear zone, that is to say, current straight shear test can not be carried out the combined measurement of both macro and micro mechanical property to the unsaturation soil body simultaneously.
Utility model content
The purpose of this utility model is to provide visual geotechnological staight scissors cutting apparatus, is intended to solve straight shear test of the prior art and can not to the unsaturation soil body, carries out the problem of the combined measurement of macroscopic view and Micro Mechanical Properties simultaneously.
The utility model is achieved in that the unsaturation soil body side slope device of measuring soil deformation and suction, applies in simulated rainfall environment, and it comprises side slope model casing, data acquisition structure and environmental simulation structure;
The upper end of described side slope model casing is skewed, forms dip plane, has for filling the cavity volume of the unsaturation soil body in it, and described cavity volume runs through the upper end of described side slope model casing, forms upper opening; One sidewall of described side slope model casing is transparence, forms transparent sidewall, in described transparent sidewall, is provided with a plurality of calibration points;
Described environmental simulation structure comprises water spraying structure and the drying structure of the upper opening top that lays respectively at described cavity volume, and described water spraying structure extends layout along the vergence direction of described dip plane;
Described data acquisition structure comprises video camera and suction sensor, and described position for video camera is in the outside of described transparent sidewall, and described suction sensor is inserted in the sidewall of described side slope model casing, extends in described cavity volume.
Further, described water spraying structure comprises water pipe and is a plurality ofly connected in fountain head on described water pipe, and the vergence direction that described water pipe extends dip plane, described side slope model casing upper end extends to be arranged, a plurality of described fountain heads are arranged towards the upper opening of described cavity volume.
Further, described water pipe is parallel to the dip plane layout of described side slope model casing upper end.
Further, the least significant end of described side slope model casing dip plane is provided with water tank, and described water tank is horizontally disposed, and is communicated with the cavity volume in described side slope model casing.
Further, described data acquisition structure also comprises volumetric water content measuring instrument, and described volumetric water content measuring instrument comprises detecting head, and described detecting head is inserted in described cavity volume.
Further, described data acquisition structure also comprises temperature and the humidity detection instrument for side slope model casing environment temperature and humidity are monitored.
Further, the unsaturation soil body in described side slope model casing cavity volume is for adopting graphite sandwich shape to become the soil body of artificial texture.
Further, the soil body that described artificial texture employing oiliness prepared Chinese ink was mixed is made after drying and pulverizing.
Further, described side slope model casing comprises frame body, described frame body surrounds the enclosing region that forms upper end open, on the sidewall of described frame body, be equipped with sidewall paneling, the cavity volume described in a plurality of described sidewall panelings encirclements form with upper opening, wherein described in one, sidewall paneling is glass plate, forms described transparent sidewall.
Compared with prior art, the unsaturation soil body side slope device that the utility model provides in test, the unsaturation soil body is contained in the cavity volume in it, utilize water spraying structure and drying structure to carry out drying and watering cycle simulation to the unsaturation soil body in side slope model casing, mobile tracking by video camera to the unsaturation soil body at calibration point place, gather the distortion of the unsaturation soil body, reach the measurement of macro-mechanical property, utilize suction sensor to gather the suction data of the unsaturation soil body, reach the measurement of Micro Mechanical Properties, that is to say that this unsaturation soil body side slope device can be realized simultaneously measures unsaturation soil body macroscopic view and Micro Mechanical Properties, it is under further investigation natural conditions, the water and soil mechanical characteristic of unsaturation soil body side slope and the stability under rainfall drying and watering cycle have important meaning.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of the unsaturation soil body side slope device of the measurement soil deformation that provides of the utility model embodiment and suction;
Fig. 2 is the schematic perspective view of the side slope model casing that provides of the utility model embodiment;
Fig. 3 is that the master of the side slope model casing that provides of the utility model embodiment looks schematic diagram;
Fig. 4 is the schematic side view of the side slope model casing that provides of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Below in conjunction with specific embodiment, realization of the present utility model is described in detail.
As shown in Fig. 1～4, the preferred embodiment providing for the utility model.
The unsaturation soil body side slope device 1 of the measurement soil deformation that the present embodiment provides and suction, apply in the environment of simulated rainfall circulation, distortion and suction to the unsaturation soil body in side slope measure, and it comprises side slope model casing 108, data acquisition structure and environmental simulation structure; Wherein, side slope model casing 108 is for installing the 1 unsaturation soil body, and its upper end is skewed, forms dip plane 1081, and the shape that its simulation side slope tilts, has cavity volume in side slope model casing 108, and this cavity volume runs through the upper end of side slope model casing 108, forms upper opening; In the present embodiment, side slope model casing 108 is strip, and certainly, its shape according to realistic simulation side slope is different, also can be provided with the shape of other type, is specifically not limited to the shape in the present embodiment; One sidewall of side slope model casing 108 is transparence, forms transparent sidewall 1084, and this transparent sidewall 1084 is provided with a plurality of calibration points 1082.
Environmental simulation structure comprises water spraying structure 102 and the drying structure 105 of the upper opening top that is arranged on side slope cavity volume, this water spraying structure 102 and drying structure 105 are separately positioned on the top of the upper opening of cavity volume, and water spraying structure 102 extends layout along the bearing of trend of this upper opening, like this, by the effect of water spraying structure 102, can realize the upper opening place water spray towards cavity volume, simulated rainfall environment, and, by the control of injection flow rate, can realize the control to rainfall amount; Utilize the upper opening effect of 105 pairs of cavity volumes of drying structure, thus can be so that moisture rapid evaporation; That is to say, utilize environmental simulation structure, can the conversion so that the soil body in side slope model casing 108 circulates under dry and wet state.
Data acquisition structure comprises video camera 106 and the suction sensor that is arranged in side slope model casing 108 outsides, and wherein, video camera 106 is positioned at the outside of transparent sidewall 1084, by calibration point 1082, for the deformation data of the soil body in cavity volume is gathered; Suction sensor is poor to be located on cavity volume sidewall, and extends in the soil body, and it can gather the suction data of the soil body in cavity volume.Video camera 106 is high-resolution camera.
Certainly, in the present embodiment, the unsaturation soil body side slope device 1 of measuring soil deformation and suction can also comprise control element 101 etc., it is electrically connected data acquisition structure and environmental simulation structure, thereby can control environmental simulation structure, and accept the Information Monitoring from data acquisition structure, make the comparatively observed data of visualize of operating personnel, or, be convenient to data to process etc. sequence of operations.
Particularly, control element 101 can be computer or middle control machine etc.
Utilize the unsaturation soil body side slope device 1 of above-mentioned measurement soil deformation and suction in testing, the unsaturation soil body is filled in whole cavity volume completely, thereby form the shape of side slope, like this, by the operation of environmental simulation structure, water spraying structure 102 simulated rainfall processes, or drying structure 105 can be by the moisture evaporation in the unsaturation soil body, realize side slope circulates under dry and wet state, and, in this environmental simulation process, video camera 106 is by the calibration point 1082 on transparent sidewall 1084, can gather the distortion of the unsaturation soil body, realize the measurement of macro-mechanical property, and suction sensor is plugged in the unsaturation soil body, the suction that can collect the unsaturation soil body changes, realize the measurement of Micro Mechanical Properties, it is under further investigation natural conditions, the water and soil mechanical characteristic of unsaturation soil body side slope and the stability under rainfall drying and watering cycle have important meaning.
In the present embodiment, for better deformation effect of observing the unsaturation soil body, be filled in the soil body that the unsaturation soil body in cavity volume is the artificial texture of employing graphite interlayer, certainly, it can be also the soil body of other type hierarchical structure.
Side slope model casing 108 comprises frame body, this frame body surrounds the enclosing region that forms upper end open, and a plurality of sidewall panelings are set on frame body sidewall, a plurality of sidewall panelings surround and form the above-mentioned cavity volume with upper opening, wherein, a sidewall paneling on frame body is glass plate, forms above-mentioned transparent sidewall 1084.The sidewall paneling that the present embodiment provides is steel plate, and certainly, it can be also the plate of other type.
And, in above-mentioned sidewall paneling, being provided with jack, the setting of this jack, can be so that external component fixing, and components and parts can be plugged in this jack, and then extend in the unsaturation soil body in cavity volume suction sensor described above.
In jack, be provided with waterproof bolt, components and parts etc. by with the coordinating of waterproof bolt, can prevent that the moisture in cavity volume from leaking out.
Said frame body is by the horizontal steel bar of a plurality of lateral arrangement and longitudinal steel bar of a plurality of longitudinal layouts, laterally steel bar and longitudinally steel bar arranged crosswise, certainly, in order to make the intensity of side slope model casing 108 larger, in the present embodiment, on the sidewall of side slope model casing 108, be provided with and reinforce steel bar 1083, this reinforces the end of the two ends sidewall of steel bar 1083, whole frame body is played to the effect of reinforcing.
In the present embodiment, water spraying structure 102 comprises water pipe 1021 and a plurality of fountain head 1022, water pipe 1021 extends layout along the vergence direction of side slope model casing 108 dip plane, upper end, a plurality of fountain heads 1022 are connected on water pipe 1021, and the upper opening towards cavity volume is arranged, thereby can be realized the operation to spraying water in cavity volume.
In order to guarantee the homogeneity of water spray, a plurality of fountain heads 1022 are consistent with the vertical range of the upper opening of cavity volume, that is to say, the upper opening that water pipe 1021 can be parallel to cavity volume is arranged.
Particularly, above-mentioned fountain head 1022 can be water spray-jet, can be also the fountain head 1022 of other type, specifically can be depending on physical simulation rainfall situation.
In the present embodiment, side slope model casing 108 also comprises water tank 103, this water tank 103 is arranged on the least significant end of side slope model casing 108 dip plane 1081, and be horizontal positioned, it is communicated with the cavity volume of side slope model casing 108, by this water tank 103, can intuitively observe phreatic line and border drainage condition in side slope model casing 108 cavity volumes, thereby realize the control to the water yield in cavity volume and water level.
Above-mentioned data acquisition structure also comprises volumetric water content measuring instrument 104, and this volumetric water content measuring instrument 104 comprises detecting head, and this detecting head is plugged in the unsaturation soil body of cavity volume, thereby convenient test is to the data of the volumetric water content of the unsaturation soil body.
In the present embodiment, drying structure 105 is hair-dryer, and this hair-dryer is arranged on the top of the upper opening of side slope model casing 108 cavity volumes, and arranges towards upper opening, thereby works distinguished and admirable can the unsaturation soil body in cavity volume being dried blowing out, transpiring moisture.
The blowing mouth of this hair-dryer is perpendicular to the upper opening of cavity volume to be arranged, like this, its drying effect is improved greatly.
Or as other embodiment, this drying structure 105 can be also that the roasting plant of other type also can.
Data acquisition structure also comprises temperature and humidity detection instrument 107, and it can be monitored whole side slope model casing 108 temperature and humidity around, and it is electrically connected at control element 101, for the enforcement of whole test provides temperature and humidity data.
The unsaturation soil body side slope device 1 of above-mentioned measurement soil deformation and suction, in operating process, carries out test monitoring control and data collection task simultaneously.The monitoring of model side slope comprises the monitoring of volumetric water content, the monitoring of the monitoring of suction, soil deformation and the monitoring in crack.Meanwhile, the control of rainfall amount, test temperature are also synchronizeed and are carried out with humidity detection.By monitoring system, draw the response condition of each parameter under drying and watering cycle, to come whereby comprehensively to analyze drying and watering cycle slope soil deformation and failure mode and mechanism wherein.
Each element in the unsaturation soil body side slope device 1 of the measurement soil deformation that the present embodiment provides and suction, controls by above-mentioned control element 101.
The present embodiment also provides the method for operating of measuring the unsaturation soil body side slope device 1 of soil deformation and suction, specific as follows:
1), make the unsaturation soil body of test use, can pulverize by sampling soil, and evenly add water, after measuring, determine the initial aqueous rate of the unsaturation soil body, and be placed in the cavity volume of side slope model casing 108;
2), treat the unsaturation soil body unity in cavity volume, insert suction sensor, and wait for that suction reaches balance;
3), utilize environmental simulation structure to do wet simulation to the unsaturation soil body in side slope model casing 108, and carry out cyclic test; Moistening process is realized by water spraying structure 102, and dry run is to accelerate evaporation, specifically uses 105 pairs of side slope surfaces of drying structure to be dried.
4) in step 3) process in, by video camera 106, gather the deformation data of the unsaturation soil body in cavity volumes, and utilize suction sensor to gather the suction data of the unsaturation soil body in cavity volume.
In above-mentioned steps 1) in, in the manufacturing process of the unsaturation soil body, for the deformation energy of the unsaturation soil body is accessed, effectively identify and follow the trail of, manufacturing artificial texture between the soil layer of the unsaturation soil body, artificial texture material requested is that the soil body mixed with oiliness prepared Chinese ink is dried after pulverizing and made.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (9)
1. measure the unsaturation soil body side slope device of soil deformation and suction, it is characterized in that, apply in simulated rainfall environment, it comprises side slope model casing, data acquisition structure and environmental simulation structure;
The upper end of described side slope model casing is skewed, forms dip plane, has for filling the cavity volume of the unsaturation soil body in it, and described cavity volume runs through the upper end of described side slope model casing, forms upper opening; One sidewall of described side slope model casing is transparence, forms transparent sidewall, in described transparent sidewall, is provided with a plurality of calibration points;
Described environmental simulation structure comprises water spraying structure and the drying structure of the upper opening top that lays respectively at described cavity volume, and described water spraying structure extends layout along the vergence direction of described dip plane;
Described data acquisition structure comprises video camera and suction sensor, and described position for video camera is in the outside of described transparent sidewall, and described suction sensor is inserted in the sidewall of described side slope model casing, extends in described cavity volume.
2. the unsaturation soil body side slope device of measurement soil deformation as claimed in claim 1 and suction, it is characterized in that, described water spraying structure comprises water pipe and is a plurality ofly connected in fountain head on described water pipe, the vergence direction that described water pipe extends dip plane, described side slope model casing upper end extends layout, and a plurality of described fountain heads are arranged towards the upper opening of described cavity volume.
3. the unsaturation soil body side slope device of measurement soil deformation as claimed in claim 2 and suction, is characterized in that, described water pipe is parallel to the dip plane of described side slope model casing upper end and arranges.
4. the unsaturation soil body side slope device of the measurement soil deformation as described in claims 1 to 3 any one and suction, it is characterized in that, the least significant end of described side slope model casing dip plane is provided with water tank, and described water tank is horizontally disposed, and is communicated with the cavity volume in described side slope model casing.
5. the unsaturation soil body side slope device of the measurement soil deformation as described in claims 1 to 3 any one and suction, it is characterized in that, described data acquisition structure also comprises volumetric water content measuring instrument, and described volumetric water content measuring instrument comprises detecting head, and described detecting head is inserted in described cavity volume.
6. the unsaturation soil body side slope device of the measurement soil deformation as described in claims 1 to 3 any one and suction, is characterized in that, described data acquisition structure also comprises temperature and the humidity detection instrument for side slope model casing environment temperature and humidity are monitored.
7. the unsaturation soil body side slope device of the measurement soil deformation as described in claims 1 to 3 any one and suction, is characterized in that, the unsaturation soil body in described side slope model casing cavity volume is for adopting graphite sandwich shape to become the soil body of artificial texture.
8. the unsaturation soil body side slope device of measurement soil deformation as claimed in claim 7 and suction, is characterized in that, the soil body that described artificial texture employing oiliness prepared Chinese ink was mixed is made after drying and pulverizing.
9. the unsaturation soil body side slope device of the measurement soil deformation as described in claims 1 to 3 any one and suction, it is characterized in that, described side slope model casing comprises frame body, described frame body surrounds the enclosing region that forms upper end open, on the sidewall of described frame body, be equipped with sidewall paneling, the cavity volume described in a plurality of described sidewall panelings encirclements form with upper opening, wherein described in one, sidewall paneling is glass plate, forms described transparent sidewall.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420201917.3U CN203849117U (en) | 2014-04-23 | 2014-04-23 | Unsaturated soil side slope device for measuring soil deformation and suction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420201917.3U CN203849117U (en) | 2014-04-23 | 2014-04-23 | Unsaturated soil side slope device for measuring soil deformation and suction |
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| CN203849117U true CN203849117U (en) | 2014-09-24 |
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| CN201420201917.3U Withdrawn - After Issue CN203849117U (en) | 2014-04-23 | 2014-04-23 | Unsaturated soil side slope device for measuring soil deformation and suction |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994933A (en) * | 2014-04-23 | 2014-08-20 | 深圳市工勘岩土集团有限公司 | Unsaturated soil slope apparatus for measuring deformation and suction of soil, and operating method thereof |
| CN104677739A (en) * | 2015-03-04 | 2015-06-03 | 东北大学 | Three-dimensional model test platform device for dual-structure soil slope failure |
| CN105388067A (en) * | 2015-11-23 | 2016-03-09 | 中国科学院武汉岩土力学研究所 | Uniform load distribution supercharging device, and three-dimensional side slope destruction model testing apparatus and method |
| CN113049779A (en) * | 2021-03-15 | 2021-06-29 | 华中农业大学 | Device and method for measuring soil moisture characteristic curve under dry-wet alternation condition based on salt solution method |
| CN113108752A (en) * | 2021-03-18 | 2021-07-13 | 山西省交通科技研发有限公司 | Side slope model containing weak interlayer and forming deformation monitoring method |
-
2014
- 2014-04-23 CN CN201420201917.3U patent/CN203849117U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994933A (en) * | 2014-04-23 | 2014-08-20 | 深圳市工勘岩土集团有限公司 | Unsaturated soil slope apparatus for measuring deformation and suction of soil, and operating method thereof |
| CN104677739A (en) * | 2015-03-04 | 2015-06-03 | 东北大学 | Three-dimensional model test platform device for dual-structure soil slope failure |
| CN105388067A (en) * | 2015-11-23 | 2016-03-09 | 中国科学院武汉岩土力学研究所 | Uniform load distribution supercharging device, and three-dimensional side slope destruction model testing apparatus and method |
| CN105388067B (en) * | 2015-11-23 | 2018-05-04 | 中国科学院武汉岩土力学研究所 | Evenly load supercharging device, three-dimensional slope damage model test device and method |
| CN113049779A (en) * | 2021-03-15 | 2021-06-29 | 华中农业大学 | Device and method for measuring soil moisture characteristic curve under dry-wet alternation condition based on salt solution method |
| CN113049779B (en) * | 2021-03-15 | 2022-03-08 | 华中农业大学 | Device and method for measuring soil moisture characteristic curve under dry-wet alternation condition based on salt solution method |
| CN113108752A (en) * | 2021-03-18 | 2021-07-13 | 山西省交通科技研发有限公司 | Side slope model containing weak interlayer and forming deformation monitoring method |
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