CN103196746A - Novel device for pseudo tri-axial creep of rock and earth engineering test block and using method of device - Google Patents
Novel device for pseudo tri-axial creep of rock and earth engineering test block and using method of device Download PDFInfo
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- CN103196746A CN103196746A CN2013100927408A CN201310092740A CN103196746A CN 103196746 A CN103196746 A CN 103196746A CN 2013100927408 A CN2013100927408 A CN 2013100927408A CN 201310092740 A CN201310092740 A CN 201310092740A CN 103196746 A CN103196746 A CN 103196746A
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Abstract
The invention relates to a novel device for pseudo tri-axial creep of a rock and earth engineering test block and a using method of the device. The novel device comprises a plurality of surrounding steel plates which surround a rock-earth test block, wherein each surrounding steel plate is connected with a spring vertical compression device with adjustable pressure; a longitudinal loading device with adjustable pressure is arranged at the top part of the rock-earth test block; a pressure sensor is arranged between the spring vertical compression device and the surrounding steel plates; the pressure sensor and the loading device are connected with a control device; and the spring vertical compression device is connected with the longitudinal loading device. By adopting the novel device, a plurality of inconveniences in experiments in the prior art are avoided; and the spring pressure is simple, is easy to achieve and is convenient to adjust; through compressing the spring by a rotary screw, a large amount of complex mechanical control of the current devices are avoided, and therefore the experiment efficiency is greatly improved; the deformation in a creep process is relatively slow, the light error caused by the slight extension of the spring is avoided by adjusting the rotary screw in time, and therefore the experiment accuracy is guaranteed; and by adopting the pressure sensor, the creep ambient pressure is kept constant, and therefore the accuracy of a low-intensity pseudo tri-axial creep test is guaranteed.
Description
Technical field
The present invention relates to a kind of new device and using method thereof for the false triaxial creepage of Geotechnical Engineering test block.
Background technology
Creep refers to that solid material is keeping under the constant condition of stress, and strain prolongs and the phenomenon that increases in time.It is different with plastic yield, and plastic yield just occurs after stress surpasses limit of elasticity usually, and that creep needs only the action time of stress is quite long, and it also can occur during less than limit of elasticity at stress.
Creep is very general in the Geotechnical Engineering, and a lot of Geotechnical Engineering disasters are also closely bound up with the creep of ground body, as the landslide, and landslide, settlement of foundation etc., it is very necessary therefore to study the creep of ground body, and this also is the important assurance of Geotechnical Engineering safety.
At present, both at home and abroad ground body creep is furtherd investigate, corresponding experimental provision arises at the historic moment, and single shaft creep test device is comparatively general, but actual forced status that can not the accurate description test specimen, three experimental provisions are less relatively, as oil pressure creep test machine, air pressure experimental machine etc., but great majority all are applicable to the research of high strength creep test, though can carry out the experiment to the low-intensity test specimen, operate too loaded down with trivial details, inefficiency; Low-intensity creep test device is more rare, and the experimental provision that forefathers research and develop is too complicated, and full-electronic is controlled, though satisfy the requirement of precision substantially, there are big problem in conventional efficient and experimental implementation, more and more are difficult to satisfy the development need of Geotechnical Engineering.
Summary of the invention
The objective of the invention is to design a kind of new device and using method thereof for the false triaxial creepage of Geotechnical Engineering test block, effectively guarantee experimental precision, improve conventional efficient, make things convenient for experimental implementation.
For achieving the above object, the design adopts following scheme:
A kind of new device for the false triaxial creepage of Geotechnical Engineering test block, it comprises that the polylith that surrounds the test block of ground body is around steel plate, each is connected with the vertical device for exerting of spring of an adjustable in pressure around steel plate, be provided with vertical charger of adjustable in pressure at the top of ground body test block, the vertical device for exerting of spring and around being provided with pressure transducer between steel plate, pressure transducer is connected with control device with charger, and the vertical device for exerting of spring is connected with vertical charger.
The vertical device for exerting of described spring comprises a high-strength spring, are spring side shields in the high-strength spring both sides, two ends are respectively the both ends of the spring baffle plate, high-strength spring is connected with adjusting screw simultaneously, adjusting screw is connected with supporting steel plate, supporting steel plate is connected with two spring side shield one ends, the other end of two spring side shields be connected around steel plate, supporting steel plate is connected with vertical charger.
Described around being provided with rubber ring between steel plate and the test block of ground body.
Described vertical charger comprises a following pallet that places ground body test block top, and following pallet top connects for upper support, and upper support is a cross, and the pressure transmission axle passes upper support, and pressure transmission axle one end is connected with following pallet, and the other end is connected with top tray; Upper support is connected with supporting steel plate by fixed screw.
A kind of using method of the new device for the false triaxial creepage of Geotechnical Engineering test block comprises following a few step:
(1) test block of ground body is positioned over middle part, device floor, the periphery adds the cover rubber ring;
(2) will organize around steel plate and sensor and spring more and connect, and make around steel plate and be adjacent to rubber ring, and keep the test block of ground body in the position at center, floor;
(3) after arrangement is stablized, regulate rotation adjusting screw control high-strength spring length on demand, when the pressure transducer registration reaches desired value and four groups of registrations unanimities, stop adjusting;
(4) settle ground body test block top charger, load in top tray, calculate general pressure, reach target and stop afterwards loading;
(5) measure every group at regular intervals around the displacement of steel plate, get its mean value as the hoop displacement, and carry out record, suitably rotate adjusting screw simultaneously, guarantee that the pressure transducer registration is constant, avoid spring because of the pressure change that creep produces to the full extent, reduce experimental error.
The present invention compares with measuring method in the past and has the following advantages:
1 the invention solves the inconvenience in the experiment in the past, and the simple and easy realization of spring pressure is convenient to regulate;
2 have avoided installing the control of a large amount of loaded down with trivial details mechanizations by the mode of rotary screw extrusion spring in the past, promote conventional efficient significantly;
The distortion of 3 creep processes is slower, by in good time adjustment rotary screw, avoids spring to extend the slight errors of bringing slightly, has guaranteed experimental precision, is enough to satisfy the needs of low-intensity creep test;
The installation of 4 pressure transducers has guaranteed the constant of creep confined pressure, has guaranteed the accuracy of the false triaxial creepage experiment of low-intensity.
The mode that 5 device upper weights load is comparatively convenient, and the pressure transmission axle has been guaranteed vertically applying of pressure, avoids bias voltage.
Description of drawings
Fig. 1 is the vertical device for exerting structural representation of spring of the present invention;
Fig. 2 is loading assembling device structural representation of the present invention;
Wherein, 1 ground body test block; 2 rubber rings; 3 around steel plate; 4 pressure transducers; 5 spring side shields; 6 both ends of the spring baffle plates; 7 supporting steel plates; 8 high-strength springs; 9 adjusting screw; 10 base plates; 11 top tray; 12 pressure transmission axles; 13 upper support; 14 times pallets; 15; Fixed screw.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing and example:
Among Fig. 1, Fig. 2, a kind of new device for the false triaxial creepage of Geotechnical Engineering test block, charger mainly comprises top tray 11, following pallet 14, pressure transmission axle 12 and upper support 13; The vertical device for exerting of spring mainly comprises around steel plate 3, spring side shield 5 and both ends of the spring baffle plate 6, high-strength spring 8, pressure transducer 4, adjusting screw 9 and supporting steel plate 7.
The pressure transmission axle 12 of its middle and upper part is nested in the circular hole in the middle of the cruciform upper support 13, and two ends link to each other with 14 with pallet 11 up and down respectively; The bottom is divided into the vertical device for exerting of spring of four groups of same structures, around steel plate 3 external pressure transducers 4, high-strength spring 8 both sides are that spring side shield 5 is avoided lateral deformation, there is both ends of the spring baffle plate 6 at high-strength spring 8 two ends, wherein Nei Ce both ends of the spring baffle plate 6 links to each other with pressure transducer 4, the both ends of the spring baffle plate 6 in the outside contacts with adjusting screw 9, adjusting screw 9 penetrates supporting steel plate 7, thereby can regulate length control high-strength spring 8 elongations that stretch into steel plate by rotation adjusting screw 9.
A kind of new device for the false triaxial creepage of Geotechnical Engineering test block, its method of operating comprises following a few step:
(1) need to select suitable ground body test block 1 to be positioned on the base plate 10 by experiment, the periphery is with rubber ring 2, makes stressed more even.
(2) will be around steel plate 3, after devices such as pressure transducer 4 and high-strength spring 8 connect, be close to rubber ring 2 with four groups around steel plate 3 and place, guarantee that as far as possible test block is in the center of base plate 10.
(3) adjusting screw 9 is screwed into supporting steel plate 7, and contacts with the both ends of the spring baffle plate 6 in the outside, rotation adjusting screw 9 and the registration of observing pressure transducer 4 stop to regulate when reaching expecting pressure value and four groups of pressure transducer 4 registrations unanimities.
(4) pressure transmission axle 12 is inserted in upper support 13, two ends link to each other with 14 with pallet 11 up and down respectively, and following pallet 14 is positioned over directly over the ground body test block 1, is fixed together by the supporting steel plate 7 of fixed screw 15 with upper support and bottom.
(5) load in top tray 11, calculate the upper load gross weight, stop when reaching expecting pressure loading.
(6) four groups of displacements around steel plate 3 of periodic measurement are averaged as the hoop creeping displacement, take off pallet 14 sedimentation deformations as the axial creeping displacement of test block, carry out record.
(7) after record is finished, rotate adjusting screw 9 slightly, make the force value of pressure transducer 4 keep constant, reduce the error that high-strength spring 8 brings because of creep elongation, afterwards duplicate measurements regularly as far as possible.
Inconvenience before the invention solves in the experiment, the simple and easy realization of spring pressure is convenient to regulate; Avoid installing the control of a large amount of loaded down with trivial details mechanizations by the mode of rotary screw extrusion spring in the past, promoted conventional efficient significantly; The creep process distortion is slower, by in good time adjustment rotary screw, avoids spring to extend the slight errors of bringing slightly, has guaranteed experimental precision; The installation of pressure transducer has guaranteed the constant of creep confined pressure, has guaranteed the accuracy of the false triaxial creepage experiment of low-intensity.Compare with forefathers' device, the tool clear superiority is gone up in the operation of this device, and conventional efficient significantly improves, and is enough to satisfy the needs of low-intensity creep test on the precision, has more practicality and generalization.
Claims (5)
1. new device that is used for the false triaxial creepage of Geotechnical Engineering test block, it is characterized in that: it comprises that the polylith that surrounds the test block of ground body is around steel plate, each is connected with the vertical device for exerting of spring of an adjustable in pressure around steel plate, be provided with vertical charger of adjustable in pressure at the top of ground body test block, the vertical device for exerting of spring and around being provided with pressure transducer between steel plate, pressure transducer is connected with control device with charger, and the vertical device for exerting of spring is connected with vertical charger.
2. the new device for the false triaxial creepage of Geotechnical Engineering test block as claimed in claim 1, it is characterized in that: the vertical device for exerting of described spring comprises a high-strength spring, are spring side shields in the high-strength spring both sides, two ends are respectively the both ends of the spring baffle plate, high-strength spring is connected with adjusting screw simultaneously, adjusting screw is connected with supporting steel plate, supporting steel plate is connected with two spring side shield one ends, the other end of two spring side shields be connected around steel plate, supporting steel plate is connected with vertical charger.
3. the new device for the false triaxial creepage of Geotechnical Engineering test block as claimed in claim 1 is characterized in that: described around being provided with rubber ring between steel plate and the test block of ground body.
4. the new device for the false triaxial creepage of Geotechnical Engineering test block as claimed in claim 1 or 2, it is characterized in that: described vertical charger comprises a following pallet that places ground body test block top, following pallet top connects for upper support, upper support is a cross, the pressure transmission axle passes upper support, pressure transmission axle one end is connected with following pallet, and the other end is connected with top tray; Upper support is connected with supporting steel plate by fixed screw.
5. a using method that adopts the described new device for the false triaxial creepage of Geotechnical Engineering test block of claim 1 is characterized in that, comprises following a few step:
(1) test block of ground body is positioned over middle part, device floor, the periphery adds the cover rubber ring;
(2) will organize around steel plate and sensor and spring more and connect, and make around steel plate and be adjacent to rubber ring, and keep the test block of ground body in the position at center, floor;
(3) after arrangement is stablized, regulate rotation adjusting screw control high-strength spring length on demand, when the pressure transducer registration reaches desired value and four groups of registrations unanimities, stop adjusting;
(4) settle ground body test block top charger, load in top tray, calculate general pressure, reach target and stop afterwards loading;
(5) measure every group at regular intervals around the displacement of steel plate, get its mean value as the hoop displacement, and carry out record, suitably rotate adjusting screw simultaneously, guarantee that the pressure transducer registration is constant, avoid spring because of the pressure change that creep produces to the full extent, reduce experimental error.
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604697A (en) * | 2013-11-22 | 2014-02-26 | 山东大学 | Fake triaxial creeping device and method for geotechnical engineering under uniform confining pressure |
| CN104344997A (en) * | 2014-11-04 | 2015-02-11 | 同济大学 | Passive type restraint loading device for triaxial test |
| CN104880366A (en) * | 2015-05-26 | 2015-09-02 | 温州大学瓯江学院 | Soil body kinetic parameter and anisotropy tester under K0 condition |
| CN106289845A (en) * | 2016-09-01 | 2017-01-04 | 中南大学 | A kind of Quantitative study tunnel surrounding comes to nothing and the dynamic test device and method softened |
| CN106338409A (en) * | 2016-08-31 | 2017-01-18 | 中南大学 | Tunnel-bottom-structure stress-state accurate-simulation indoor test apparatus |
| CN106546492A (en) * | 2016-10-28 | 2017-03-29 | 中国地质大学（武汉） | A kind of Rock And Soil large scale original position triaxial creep test system |
| KR101814020B1 (en) * | 2017-08-31 | 2018-01-02 | 한국건설기술연구원 | Current Hydraulic Fracturing System for Applying Differential Stress |
| KR101814019B1 (en) * | 2017-08-31 | 2018-01-30 | 한국건설기술연구원 | Current Hydraulic Fracturing System for Applying Differential Stress |
| CN108414348A (en) * | 2018-05-07 | 2018-08-17 | 绍兴文理学院 | A kind of true triaxial test system and its implementation of test rock |
| CN108613881A (en) * | 2018-05-07 | 2018-10-02 | 绍兴文理学院 | A kind of true triaxial test system of high temperature and the test rock under seepage effect |
| CN108918287A (en) * | 2018-09-19 | 2018-11-30 | 西安建筑科技大学 | A kind of tunnel creep model experimental rig and test method |
| CN109030210A (en) * | 2018-08-02 | 2018-12-18 | 三峡大学 | Soil body creep simulation device |
| CN109655336A (en) * | 2018-12-10 | 2019-04-19 | 三峡大学 | A method of research complex condition ground Creep Rule |
| CN110823727A (en) * | 2019-11-21 | 2020-02-21 | 安徽理工大学 | High-voltage pulse discharge fracturing experimental platform for reforming oil and gas reservoir |
| CN111735724A (en) * | 2020-06-23 | 2020-10-02 | 三峡大学 | Device and method for detecting creep stress of in-situ rock-soil body |
| CN113720693A (en) * | 2020-05-26 | 2021-11-30 | 中国石油天然气集团有限公司 | Experimental device and experimental method for observing hydraulic fracture |
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Cited By (26)
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| CN103604697B (en) * | 2013-11-22 | 2015-07-22 | 山东大学 | Fake triaxial creeping device and method for geotechnical engineering under uniform confining pressure |
| CN103604697A (en) * | 2013-11-22 | 2014-02-26 | 山东大学 | Fake triaxial creeping device and method for geotechnical engineering under uniform confining pressure |
| CN104344997A (en) * | 2014-11-04 | 2015-02-11 | 同济大学 | Passive type restraint loading device for triaxial test |
| CN104880366A (en) * | 2015-05-26 | 2015-09-02 | 温州大学瓯江学院 | Soil body kinetic parameter and anisotropy tester under K0 condition |
| CN104880366B (en) * | 2015-05-26 | 2018-01-16 | 温州大学瓯江学院 | Evolution Microstructure method based on soil body kinetic parameter and anisotropy analyzer under the conditions of K0 |
| CN106338409B (en) * | 2016-08-31 | 2018-07-24 | 中南大学 | A kind of tunnel bottom structural stress state accurately simulates laboratory testing rig |
| CN106338409A (en) * | 2016-08-31 | 2017-01-18 | 中南大学 | Tunnel-bottom-structure stress-state accurate-simulation indoor test apparatus |
| CN106289845A (en) * | 2016-09-01 | 2017-01-04 | 中南大学 | A kind of Quantitative study tunnel surrounding comes to nothing and the dynamic test device and method softened |
| CN106289845B (en) * | 2016-09-01 | 2018-08-28 | 中南大学 | A kind of dynamic test device and method that Quantitative study tunnel surrounding comes to nothing with softening |
| CN106546492A (en) * | 2016-10-28 | 2017-03-29 | 中国地质大学（武汉） | A kind of Rock And Soil large scale original position triaxial creep test system |
| CN106546492B (en) * | 2016-10-28 | 2018-04-13 | 中国地质大学（武汉） | A kind of Rock And Soil large scale original position triaxial creep test system |
| KR101814019B1 (en) * | 2017-08-31 | 2018-01-30 | 한국건설기술연구원 | Current Hydraulic Fracturing System for Applying Differential Stress |
| KR101814020B1 (en) * | 2017-08-31 | 2018-01-02 | 한국건설기술연구원 | Current Hydraulic Fracturing System for Applying Differential Stress |
| CN108414348A (en) * | 2018-05-07 | 2018-08-17 | 绍兴文理学院 | A kind of true triaxial test system and its implementation of test rock |
| CN108613881A (en) * | 2018-05-07 | 2018-10-02 | 绍兴文理学院 | A kind of true triaxial test system of high temperature and the test rock under seepage effect |
| CN108414348B (en) * | 2018-05-07 | 2020-05-26 | 绍兴文理学院 | True triaxial test system for testing rock and implementation method thereof |
| CN108613881B (en) * | 2018-05-07 | 2020-09-04 | 绍兴文理学院 | True triaxial test system for testing rock under high temperature and seepage effect |
| CN109030210A (en) * | 2018-08-02 | 2018-12-18 | 三峡大学 | Soil body creep simulation device |
| CN108918287A (en) * | 2018-09-19 | 2018-11-30 | 西安建筑科技大学 | A kind of tunnel creep model experimental rig and test method |
| CN108918287B (en) * | 2018-09-19 | 2023-09-19 | 西安建筑科技大学 | Tunnel creep model test device and test method |
| CN109655336A (en) * | 2018-12-10 | 2019-04-19 | 三峡大学 | A method of research complex condition ground Creep Rule |
| CN109655336B (en) * | 2018-12-10 | 2021-07-23 | 三峡大学 | Method for researching creep law of rock and soil under complex condition |
| CN110823727A (en) * | 2019-11-21 | 2020-02-21 | 安徽理工大学 | High-voltage pulse discharge fracturing experimental platform for reforming oil and gas reservoir |
| CN113720693A (en) * | 2020-05-26 | 2021-11-30 | 中国石油天然气集团有限公司 | Experimental device and experimental method for observing hydraulic fracture |
| CN111735724A (en) * | 2020-06-23 | 2020-10-02 | 三峡大学 | Device and method for detecting creep stress of in-situ rock-soil body |
| CN111735724B (en) * | 2020-06-23 | 2023-03-10 | 三峡大学 | Device and method for detecting creep stress of in-situ rock-soil body |
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