CN101614638B - Horizontal triaxial tension and compression tester - Google Patents
Horizontal triaxial tension and compression tester Download PDFInfo
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- CN101614638B CN101614638B CN2009100232614A CN200910023261A CN101614638B CN 101614638 B CN101614638 B CN 101614638B CN 2009100232614 A CN2009100232614 A CN 2009100232614A CN 200910023261 A CN200910023261 A CN 200910023261A CN 101614638 B CN101614638 B CN 101614638B
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Abstract
The invention relates to a horizontal triaxial tension and compression tester comprising an AC machine arranged on a test platform. The power output end of the AV machine is connected with a rigid load bar on which a force sensor is arranged; the rigid load bar is connected with a front piston rod; the front piston rod is also provided with a displacement sensor; the force sensor, the displacement sensor and a data acquisition board are connected with a computer; the other end of the front piston rod is connected with a sample cap after passing through a front baffle board, and the sample cap is connected with an air exit hole on the front baffle board by a plastic soft tube; the other end of a rolling bearing on a horizontal stand is also provided with a sample cap which is connected with a rear piston rod; the rear piston rod is connected with a fixed baffle board after passing through a rear baffle board; the AC machine is started, and then an acquisition program carries out real-time acquisition and preserves output values of the force sensor and the displacement sensor; a drain hole is opened, and then a sample is removed after water is completely discharged; and subsequently, the width of a sample tension failure zone is measured. The invention has the characteristics of good integrity, high stability of loading and high axial rigidity.
Description
Technical field
The present invention relates to a kind of tension and compression tester, particularly a kind of horizontal triaxial tension and compression tester.
Background technology
The tensile strength of compacting clay and limit tensile strain are to carry out the very important tensile properties parameter of earth structure fracture evaluation.The tensile properties and the failure mechanism of understanding compacting clay are significant for the safety evaluation of earth-rock works.For example, tensile crack is a hidden danger and the main type of destroying common in the earth-rock works.The table transverse stretching crack, dam that causes by non-uniform settling and be the main type of earth and rockfill dam tensile crack by the core-wall hydraulic fracture crack that the wedge cleaving water pressure causes.These cracks can cause earth and rockfill dam antiseepage body to destroy.Can therefore, the research of stress-strain relation characteristic, strength characteristics and failure mechanism under three stretching conditions of compacting clay has important engineering application value, be related to rationally correctly estimate civil engineering cracking criterion.
The triaxial extension test of carrying out the compacting clay is a basic means of studying and addressing the above problem.Because the restriction of test method, the research means to compacting clay tensile properties is main with uniaxial tensile test in early days.Aspect the triaxial extension test instrument, generally be on existing normal triaxial compressometer, to reequip to obtain, axially coupling stiffness is less, is difficult to measure the overall process curve of soil body tensile stress-strain.In addition, because sample is placed vertically, when little confined pressure, can't eliminate the influence of soil body deadweight.
Summary of the invention
In order to overcome the deficiency of above-mentioned prior art; The purpose of this invention is to provide a kind of horizontal triaxial tension and compression tester; Make it can be used to measure compacting clay tensile stress-strain overall process curve under three conditions, the characteristics that have good integrity, load good stability, axial rigidity are big.
To achieve these goals, the technical scheme of the present invention's employing is:
A kind of horizontal triaxial tension and compression tester; Include test platform 16, test platform 16 is provided with the alternating current generator 1 as loading equipemtn, and the clutch end of alternating current generator 1 links to each other with rigidity load bar 5; On rigidity load bar 5, be provided with force transducer 2; Rigidity load bar 5 links to each other with an end of secondary piston bar 6, and secondary piston bar 6 also is provided with displacement transducer 3, and force transducer 2, displacement transducer 3 all are connected with computing machine 21 with data acquisition board 20; The front apron 22 that the other end of secondary piston bar 6 passes horizontal pressure chamber 4 is connected with sample cap 15; Sample cap 15 is connected with vent port 17 on the front apron 22, also is provided with sample cap 19 with sample cap 15 corresponding positions, and sample cap 19 is connected with vent port 23 on the backboard 18 through plastic flexible pipe; Sample cap 19 links to each other with an end of back piston bar 10, and the backboard 18 that the other end of back piston bar 10 passes horizontal pressure chamber 4 links to each other with fixed dam 11.
The maximum axial force that described alternating current generator 1 provides is each 300kg of tension and compression, and maximum load displacement range is ± 20mm.
The load deflection speed of described alternating current generator 1 is 0.00155mm/min～0.375mm/min.
The backboard 18 of described pressure chamber 4 is detachable.
Described pressure chamber 4 is fixed on the experiment porch 16.
The front apron 22 of described pressure chamber 4 is provided with the vent port 17 of air hole 12, sample cap 15.
The backboard 18 of described pressure chamber 4 is provided with inlet opening 13, the osculum 14 that is connected with pressure chamber 4, also is provided with the vent port 23 of sample cap 19 in the pressure chamber 4.
All there is the spiral shell button at described secondary piston bar 6, back piston bar 10 two ends.
Described secondary piston bar 6,10 horizontal centrings of back piston bar also can move horizontally.
Described back piston bar 10 is fixed on the experiment porch 16 through fixed dam 11.
Described data acquisition board 20 maximum frequency acquisitions can reach 100 times/second.
The present invention compared with prior art has the following advantages and the high-lighting technique effect: the 1) good integrity of instrument.All parts all are assembled on the same experiment porch, have guaranteed the globality of instrument effectively; 2) good stability that loads.Adopt the closed loop alternating current generator to carry out displacement controllable and load, can realize stretching or compress two-way loading at the uniform velocity stably, loading speed also can regulate and control easily; 3) axial rigidity is big.Loading at instrument is axial, all adopt to be fixedly connected between each parts, and coupling stiffness is big, makes to measure the process and corresponding strain softening section that soil sample reaches soil body generation fail in tension after the peak value tensile strength; 4) sample horizontal positioned, soil body deadweight is to the influence of test findings in the time of can eliminating little confined pressure, and the stress condition of sample is simply clear.
Description of drawings
Fig. 1 is the structure vertical view of horizontal triaxial tension and compression tester provided by the invention.
Fig. 2 is the structural front view of horizontal triaxial tension and compression tester provided by the invention.
Fig. 3 is a sensor of the present invention and the block diagram that is connected of data acquisition board, computing machine.
Embodiment
Below in conjunction with accompanying drawing structural principle of the present invention and principle of work are done further explain.
Referring to Fig. 1,2, a kind of horizontal triaxial tension and compression tester includes test platform 16; Test platform 16 is provided with the alternating current generator 1 as loading equipemtn, and the maximum axial force that alternating current generator 1 provides can reach each 300kg of tension and compression, and maximum load displacement range is ± 20mm; Load deflection speed is 0.00155mm/min～0.375mm/min; Can satisfy under the general condition requirement of the soil body being carried out three stretchings, compression and compression-stretching composite test, the clutch end of alternating current generator 1 links to each other with rigidity load bar 5, can realize the at the uniform velocity steadily loading that front and back are two-way; On rigidity load bar 5, be provided with force transducer 2; Rigidity load bar 5 links to each other with an end of secondary piston bar 6, and secondary piston bar 6 also is provided with displacement transducer 3, and force transducer 2, displacement transducer 3 all are connected with computing machine 21 with data acquisition board 20; Data acquisition board 20 maximum frequency acquisitions can reach 100 times/second, can write down the stretcher strain overall process of compacting clay preferably.The front apron 22 that the other end of secondary piston bar 6 passes horizontal pressure chamber 4 is connected with sample cap 15; Front apron 22 is provided with the vent port 17 of air hole 12, sample cap 15; Pressure chamber 4 is fixed on the experiment porch 16; Sample cap 15 is connected with vent port 17 on the front apron 22 through plastic flexible pipe, and 8 of sample 7 and horizontal stands are provided with rolling bearing 9, can reduce the friction between sample 7 and the horizontal stand 8 effectively.The effect of horizontal stand 8 is in order to eliminate the influence of sample deadweight moment of flexure; On the other end of rolling bearing 9, also be provided with sample cap 19 with sample cap 15 corresponding positions; Sample cap 15, sample cap 19 and 7 on sample bond through epoxy structural rubber; Sample cap 19 links to each other with an end of back piston bar 10, and all there is the spiral shell button at secondary piston bar 6, back piston bar 10 two ends.Piston rod 10 is fixed on the experiment porch 16 through fixed dam 11; The backboard 18 that the other end of back piston bar 10 passes horizontal pressure chamber 4 links to each other with fixed dam 11; Backboard 18 is provided with the vent port 23 of the inlet opening 13, osculum 14 and the sample cap 19 that are connected with horizontal pressure chamber 4; Backboard 18 is detachable, and backboard 18 detachably is to adorn appearance for ease.But piston rod 6, piston rod 10 horizontal centrings and horizon light slippage are moving.
Principle of work of the present invention is:
During test, at first earlier sample 7 is connected with front end sample cap 15, puts latex film, connect other end sample cap 19 afterwards by the requirement of testing program, at last that latex film and sample cap 15, the 19 two ends colligations of sample cap are good.The sample that installs 7 levels have been placed on laying in the pressure chamber 4 on the horizontal stand 8 of rolling bearing 9, have connected secondary piston bar 6 and back piston bar 10, finely tuned horizontal stand 8 simultaneously sample can be moved horizontally swimmingly, then pressure chamber's 4 bonnets have been built.
Open air hole 12, the water filling in pressure chamber 4 from inlet opening 13, treat that the pressure chamber is full of water after, close air hole 12.Apply certain confined pressure according to testing program, and fixed 10～12 hours.After treating that sample 7 distortion are stable, connect load bar 5 and force transducer 2, set up displacement transducer 3.Open computing machine 21 data acquisition system (DAS)s, the initial value of adjustment displacement transducer 3 and force transducer 2.
Open alternating current generator 1, set suitable loading velocity, carry out at the uniform velocity stable the loading.In the loading procedure, the output valve of capture program collection in real time and reserve force sensor 2 and displacement transducer 3.
After the off-test, remove confined pressure, open osculum 14 simultaneously, treat the Nei Shui of pressure chamber emptying after, remove sample successively, note the integrality of protection sample, and measure sample pulling damage sector width.
Among the figure: 1-closed loop alternating current generator; The 2-force transducer; The 3-displacement transducer; The horizontal pressure chamber of 4-; 5-rigidity load bar; 6-secondary piston bar; The 7-sample; The 8-horizontal stand; The 9-rolling bearing; 10-back piston bar; The 11-fixed dam; The 12-air hole; The 13-inlet opening; The 14-osculum; 15-sample cap; The 16-experiment porch; The 17-vent port; The 18-backboard; 19-sample cap; The 20-data acquisition board; The 21-computing machine; The 22-front apron; The 23-vent port.
Claims (9)
1. horizontal triaxial tension and compression tester; Include test platform (16), it is characterized in that, test platform (16) is provided with the alternating current generator (1) as loading equipemtn; The clutch end of alternating current generator (1) links to each other with rigidity load bar (5); On rigidity load bar (5), be provided with force transducer (2), rigidity load bar (5) links to each other with an end of secondary piston bar (6), and secondary piston bar (6) also is provided with displacement transducer (3); Force transducer (2), displacement transducer (3) all are connected (21) with data acquisition board (20) with computing machine; The front apron (22) that the other end of secondary piston bar (6) passes horizontal pressure chamber (4) is connected with the first sample cap (15), and the first sample cap (15) is connected with vent port (17) on the front apron (22), is provided with horizontal stand (8) in horizontal pressure chamber (4); Be laid with rolling bearing (9) on the horizontal stand (8); On the other end of rolling bearing (9), also be provided with the second sample cap (19) with the corresponding position of the first sample cap (15), the second sample cap (19) links to each other with an end of back piston bar (10), and the backboard (18) that the other end of back piston bar (10) passes horizontal pressure chamber (4) links to each other with fixed dam (11).
2. a kind of horizontal triaxial tension and compression tester according to claim 1; It is characterized in that; The maximum axial force that described alternating current generator (1) provides can reach each 300kg of tension and compression; Maximum load displacement range is ± 20mm that the load deflection speed of alternating current generator (1) is 0.00155mm/min～0.375mm/min.
3. a kind of horizontal triaxial tension and compression tester according to claim 1 is characterized in that, the backboard (18) of described pressure chamber (4) is detachable.
4. according to claim 1 or 3 described a kind of horizontal triaxial tension and compression testers, it is characterized in that described pressure chamber (4) are fixed on the test platform (16).
5. a kind of horizontal triaxial tension and compression tester according to claim 1 is characterized in that, the front apron (22) of described pressure chamber (4) is provided with the vent port (17) of air hole (12), the first sample cap (15).
6. a kind of horizontal triaxial tension and compression tester according to claim 1; It is characterized in that; The backboard (18) of described pressure chamber (4) is provided with inlet opening (13), the osculum (14) that is connected with pressure chamber (4), also is provided with the vent port (23) of the second sample cap (19) on pressure chamber (4).
7. a kind of horizontal triaxial tension and compression tester according to claim 1 is characterized in that, all there is the spiral shell button at described secondary piston bar (6), back piston bar (10) two ends.
8. a kind of horizontal triaxial tension and compression tester according to claim 1 is characterized in that, described back piston bar (10) is fixed on the experiment porch (16) through fixed dam (11).
9. a kind of horizontal triaxial tension and compression tester according to claim 1 is characterized in that, the maximum frequency acquisition of described data acquisition board (20) can reach 100 times/second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100232614A CN101614638B (en) | 2009-07-10 | 2009-07-10 | Horizontal triaxial tension and compression tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100232614A CN101614638B (en) | 2009-07-10 | 2009-07-10 | Horizontal triaxial tension and compression tester |
Publications (2)
| Publication Number | Publication Date |
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| CN101614638A CN101614638A (en) | 2009-12-30 |
| CN101614638B true CN101614638B (en) | 2012-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100232614A Expired - Fee Related CN101614638B (en) | 2009-07-10 | 2009-07-10 | Horizontal triaxial tension and compression tester |
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| CN (1) | CN101614638B (en) |
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| CN102589989B (en) * | 2012-02-10 | 2013-06-19 | 重庆大学 | Single-shaped pulling-pressing double-function creepmeter |
| CN102621012B (en) * | 2012-03-31 | 2013-11-20 | 重庆大学 | Multifunctional true triaxial rock creepmeter |
| CN103134721B (en) * | 2013-02-07 | 2015-04-22 | 西安理工大学 | Dynamic triaxial testing machine servo-driven by electric cylinder |
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| CN104215508B (en) * | 2014-09-23 | 2015-10-28 | 天合石油集团汇丰石油装备有限公司 | A kind of tensile and compression testing machine |
| CN104977217B (en) * | 2015-07-16 | 2018-04-06 | 西安长庆科技工程有限责任公司 | A kind of soil body triaxial extension test instrument |
| CN106908323B (en) * | 2017-02-24 | 2019-07-12 | 河海大学 | A kind of rock-like materials Hydraulic fracturing test device and method |
| CN107036894A (en) * | 2017-06-03 | 2017-08-11 | 中国科学院地球化学研究所 | A kind of titanium alloy mechanical property test axial pressurizing device |
| CN108709807B (en) * | 2018-07-16 | 2023-10-10 | 江苏省特种设备安全监督检验研究院 | Open type variable stroke pulling machine |
| CN109269902B (en) * | 2018-09-19 | 2020-10-20 | 山东科技大学 | Rock mechanical test system with adjustable loading rigidity and test method |
| CN110274830A (en) * | 2019-04-18 | 2019-09-24 | 防灾科技学院 | A kind of drift-sand Modified soil tensile characteristics test macro |
| CN110501199B (en) * | 2019-09-12 | 2021-08-03 | 河海大学 | Preparation method and use method of concrete member cement splitting test device |
| CN111811837A (en) * | 2020-07-22 | 2020-10-23 | 东风小康汽车有限公司重庆分公司 | Tension-pressure and displacement loading device |
| CN111855411B (en) * | 2020-07-31 | 2023-06-16 | 中国人民解放军空军工程大学 | Geosynthetic material straight-pull/pull tester and test method |
| CN114354353A (en) * | 2021-04-28 | 2022-04-15 | 南昌工程学院 | Soil mass macro-micro stretching characteristic confining pressure loading device and testing method |
| CN113533034B (en) * | 2021-08-30 | 2023-01-17 | 石家庄铁道大学 | Soil body tensile test device and soil body tensile test method |
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2009
- 2009-07-10 CN CN2009100232614A patent/CN101614638B/en not_active Expired - Fee Related
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