CN107607387A - A kind of continuous loading consolidation apparatus of strain controlling for being used to test soil body compressible index - Google Patents
A kind of continuous loading consolidation apparatus of strain controlling for being used to test soil body compressible index Download PDFInfo
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- CN107607387A CN107607387A CN201710830837.2A CN201710830837A CN107607387A CN 107607387 A CN107607387 A CN 107607387A CN 201710830837 A CN201710830837 A CN 201710830837A CN 107607387 A CN107607387 A CN 107607387A
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Abstract
The invention discloses a kind of continuous loading consolidation apparatus of strain controlling for being used to test soil body compressible index, the main strain energy that solves controls continuous loading consolidation method of testing to there is no tester awkward situation at home, domestic blank is in the field filled up, to popularize strain controlling formula consolidation test, provide a kind of possibility, while the instrument realizes the automatic control of test process, specification detecting step, the labor intensity of tester is alleviated, substantially increases testing efficiency.The invention mainly by：The composition such as computer, acquisition controller, sensor, consolidation apparatus main frame, data connecting line is monitored, wherein monitoring computer terminal software is used to set test parameter, instrument control parameters, data processing etc.；Brain of the acquisition controller as whole system, is responsible for collection sensing data, sends control signal for consolidation apparatus main frame, while each stage of test process is controlled.
Description
Technical field
The present invention is a kind of continuous loading consolidation apparatus of strain controlling for being used to test soil body compressible index, belongs to test skill
Art field.
Background technology
Soil test is one of important content in civil engineering, and the compressibility of the wherein soil body is the important indicator of its measure
One of, under additional stress, foundation soil soil deformation, so as to which building settlement on the soil body will be caused to deform, uneven sedimentation
Or the excessive normal use for being directly connected to building of sedimentation, or even the safety of building can be endangered, and therefore, rapid and accurate determination soil
The compressible index of body is significant in engineering practice.
The method of the compressible index of the domestic existing indoor test soil body is mainly Standard consolidated test method, using lever
Consolidation apparatus or full automatic gas pressure consolidation apparatus successive loading, it is long that the major defect of the above method is that experiment lasts, and typically completes one
Set experiment is much no less than 4~5 days, and final stage is sentenced surely, linear revised law, although can accelerate experiment process, due to lacking
Theoretical foundation, do not used by country and industry correlation test specification, and above-mentioned method of testing is not met under actual conditions
Foundation settlement deformation rule, and the quick strain controlling continual loading test of process is tested because there has been no correlator at home
Device, therefore the test method fails to be popularized.
The content of the invention
Of the invention is exactly to be directed to deficiency existing for above-mentioned existing apparatus and set and provide one kind for testing soil body compressibility
The continuous loading consolidation apparatus of strain controlling of index, the purpose is to provide a kind of interior that is used for quickly to determine soil body compressible index
Full-automatic strain controlling continual loading test system, apparatus of the present invention and method of testing solve successive loading method of testing
The problem of time-consuming is permanent, and ground foundation simulation sedimentation and deformation does not meet actual conditions, its test data is truer, credible, simultaneously
It also is compliant with GB/T50123-1999《Standard for test methods of earthworks》, the device is the continuous loading consolidation examination of domestic popularization strain controlling
Test and a kind of possibility be provided, realize automatic data acquisition, automatically by constant strain method (CRS), permanent loading rate method (CRL), etc. hole
Gap water pressure gradient method (CGC), the loading of classification method of addition mode, test recover instrument original state etc., the instrument collection after terminating
Electric transmission, machine-building, sensor technology can realize the Automated condtrol of experiment process, each process of test in one
Energy automatic transfer is continuously run, and is controlled without manual intervention.
The purpose of the present invention is achieved through the following technical solutions：
This kind is used for the continuous loading consolidation apparatus of strain controlling for testing soil body compressible index, it is characterised in that：Including prison
Computer (1), acquisition controller (2) and consolidation apparatus main frame are controlled, consolidation apparatus main frame is simply supported beam frame structure, and base of frame is installed
Continuous loading system (7), the continuous horizontal cross bar (6) of loading system (7) radially installed one, cross bar (6) upper and lower ends are equipped with fine motion
Switch (5) and play position-limiting action, the container (10) of test sample (20), container (10) side wall are placed in screw-threaded shaft elevator (7) upper surface
It is connected equipped with sensor for pore water pressure (18) with test sample (20) bottom by measuring holes (17) to detect specimen sample (20) production
Raw pore pressure, simply supported beam top are equipped with big principal stress sensor (4) and displacement transducer (11) to detect test sample
(20) stress degree and axial displacement；
Acquisition controller (2) and sensor for pore water pressure (18), big principal stress sensor (4), displacement transducer (11) and fine motion
(5) connection and gathered data are switched, the data collected are transferred to monitoring computer (1), in addition, acquisition controller (2) is also
The operation of simultaneously dynamic control servomotor (3) is connected with servomotor (3).
Microswitch (5) is used for preventing the hydraulic cylinder piston in continuous loading system (7) and back-pressure saturation device in stroke
Both ends are stuck, burn motor, damage pressing mechanism；
Placing the container (10) of test sample (20) includes base (19), and duct (17) are arranged in base (19), in addition,
Vent (16), the outer end connection Exhaust screw (15) of vent (16) are additionally provided with base (19)；
It is the retaining ring (13) of annular barrel above base (19), the junction of base (19) and retaining ring (13) is provided with
O-ring seal (14), the upper end of retaining ring (13) are provided with the upper lid (12) of annular, and test sample (20) is placed on by base (19)
In the inner chamber formed with retaining ring (13), the top of test sample (20), which is placed, makees pressing plate (18).
Continuous loading system (7) is the screw-threaded shaft elevator (7) or hydraulic means of servomotor (3) driving.
It is of the present invention to be used to test in the continuous loading consolidation apparatus of strain controlling of soil body compressible index：
Monitor computer (1) and pass through software design patterns acquisition controller associated control parameters and the basic work of consolidation test
Journey information, loading method, test termination condition information；
Acquisition controller (2) is used for detection numerical value, the speed of dynamic control xial feed for monitoring, recording simultaneously transmission sensor
Rate, force value size etc., direction and the work order for receiving and dispatching computer terminal software；
Big principal stress sensor (4) is used for detecting the axial force of test sample (20)；
Sensor for pore water pressure (18) is used for detecting caused pore pressure in test sample (20)；
Displacement transducer (11) is used for detecting the axial deformation of test sample (20)；
Hydraulic pressure or screw-threaded shaft elevator extrude pure water or by servo electricity as continuous loading system (7) by servomotor (3)
Machine (3) drive leading screw moves along a straight line continuously applies xial feed to test sample (20) by setting loading mode, existing solid
Continuous loading system (7) is not included in knot instrument main frame；
Continuous loading system (7) is also added into the microswitch (5) as limiting and protecting device, and test sample (20) is placed
It is real by O-ring seal (14) between base (19) and retaining ring (13) in the inner chamber being made up of base (19) and retaining ring (13)
Now seal, such structure makes consolidation apparatus main frame serve not only as the container use of soil body sample, and is used as whole acquisition control
The actuation mechanism of device (2), is worked in whole tester.
Data connecting line is used for whole instrument organic linking, and the data collection and control for whole instrument adds off-load to provide
Passage.
The associated control parameters of acquisition controller include sensor calibration parameter, system configuration parameter, servomotor (3) control
Parameter, deceleration device speed ratio plus unloading control parameter processed；
Consolidation test basic parameter include test in engineering name, job number, soil body sample number into spectrum, method of testing,
Off-test condition, strain rate, strain energy control ratio.
Acquisition controller (2) includes：
Embedded mmdb source module (22), the module, which is used for closing monitoring computer (1), can perform whole test automatically
Process；
Data conversion acquisition module (23), the module are used for the analog electrical signal for detecting sensor, are converted into numeral
Signal；
Power failure protection module (24), the module are used in test process after power down, preserve system operation scene, re-power
Afterwards, resume operation scene, continues testing process；
Control module for servo motor (25), the module are used for start and stop, rotation direction and the speed for controlling servomotor (3)；
Communication module (26), the module is used to adjust acquisition controller (2) and the level of control microcomputer (1) communications protocol will
Ask, meet the hardware requirement mutually communicated.
Brief description of the drawings
Fig. 1 is the functional schematic of monitoring computer (1)
Fig. 2 is the flow chart of monitoring computer (1) close beta software
Fig. 3 is the functional schematic of acquisition controller (2)
Fig. 4 is the flow chart of acquisition controller (2) close beta software
Fig. 5 is the functional schematic of consolidation apparatus of the present invention
Fig. 6 is the structural representation of consolidation apparatus of the present invention
Fig. 7 is the structural representation of container (10) in consolidation apparatus of the present invention
Embodiment
Technical solution of the present invention is further described below with reference to drawings and examples：
Referring to shown in accompanying drawing 5~7, this kind is used for the continuous loading consolidation apparatus of strain controlling for testing soil body compressible index,
It is characterized in that：It is simply supported beam framework including monitoring computer (1), acquisition controller (2) and consolidation apparatus main frame, consolidation apparatus main frame
Structure, base of frame install continuous loading system (7), the continuous horizontal cross bar (6) of loading system (7) radially installed one, cross bar (6)
Upper and lower ends play position-limiting action equipped with microswitch (5), and the container of test sample (20) is placed in screw-threaded shaft elevator (7) upper surface
(10), container (10) side wall is connected to examine equipped with sensor for pore water pressure (18) with test sample (20) bottom by measuring holes (17)
Pore pressure caused by test specimens sample (20), is additionally provided with vent (16) in base (19), vent (16) it is outer
End connects Exhaust screw (15), is the retaining ring (13) of annular barrel, base (19) and retaining ring (13) above base (19)
Junction is provided with O-ring seal (14), and the upper end of retaining ring (13) is provided with the upper lid (12) of annular, and test sample (20) is placed
In the inner chamber being made up of base (19) and retaining ring (13), the top of test sample (20), which is placed, makees pressing plate (18).On simply supported beam
Portion is equipped with big principal stress sensor (4) and displacement transducer (11) to detect the stress degree of test sample (20) and axial position
Move；
Acquisition controller (2) and sensor for pore water pressure (18), big principal stress sensor (4), displacement transducer (11) and fine motion
(5) connection and gathered data are switched, the data collected are transferred to monitoring computer (1), in addition, acquisition controller (2) is also
The operation of simultaneously dynamic control servomotor (3) is connected with servomotor (3).
Microswitch (5) is used for preventing the hydraulic cylinder piston in continuous loading system (7) and back-pressure saturation device in stroke
Both ends are stuck, burn motor, damage pressing mechanism；
Continuous loading system (7) is the screw-threaded shaft elevator (7) or hydraulic means of servomotor (3) driving.
The function of monitoring computer (1) realizes that its software flow pattern is as shown in figure 1, monitoring calculates by software
Software main function in machine (1) be transceiver controller it is various control, calibration parameter and test relevant parameter, including：
A, the associated control parameters of data acquisition controller, including sensor calibration parameter, system configuration parameter, servo electricity
Machine (3) control parameter, deceleration device speed ratio plus unloading control parameter etc.；
B, data acquisition controller concerned control command, online, state reset of shaking hands, sensor zero, test start, protected
Deposit the orders such as test data, transmitting-receiving test parameter, signal switching, instrument calibration, data field inspection；
C, consolidation test test basic parameter, including the engineering name of test soil sample, job number, test number, drilling
Numbering, loading double recipe formula, adopt number interval, test termination condition etc.；
D, test mode tracks, including display measured sensor data, data acquisition controller current state, test process
Information, dynamic draw test curve etc.；
E, test data is handled, including saved test data is handled, analyzes, accept or reject, being fitted, printing,
Form conversion etc.；
Acquisition controller (2) is used for instrument controlling, data acquisition, adds and unloads loading, strain rate control, precompressed, test knot
Each stage of test process such as restPose after beam, and its inside function module realizing method includes：
Acquisition controller (2) includes：
Embedded mmdb source module (22), the module, which is used for closing monitoring computer (1), can perform whole test automatically
Process, acquisition controller embed MCU microcontrollers, and source program, which is adopted, to be shown a C language, and after being compiled into machine code, is cured to MCU
In, brains of the MCU as acquisition controller, it is responsible for being controlled other each modules, a complete testing process such as Fig. 4 institutes
Show；
Data conversion acquisition module (23), the module are used for the analog electrical signal for detecting sensor, are converted into numeral
Signal；Sensor signal is adjusted to frequency signal by voltage-frequency conversion chip first, and it is same with acquisition controller clock pulses
After step, while it is sent into two step-by-step counting chips, at a certain time interval, records the quantity of two group pulse signals, meter
Calculate both ratio, and known to because of the frequency of clock pulses being, therefore the signal frequency value of tested sensor can be calculated, then
By table look-up or core calculate, try to achieve physical quantity corresponding to electric signal；
Power failure protection module (24), the module are used in test process after power down, preserve system operation scene, re-power
Afterwards, resume operation scene, continues testing process；Using 3.6V batteries as back power supply, it is data storage continued power, protects
Card data are not lost, and MCU carried out once resetting operation in power-off and upper electric starting stage, are ensureing acquisition controller action just
Often, experimental test can continue progress；Back battery charges, using constant voltage charging method, anode and Switching Power Supply positive pole it
Between a connect diode and resistance, resistance calculated according to being advisable for 12~14 hours battery charge point used times.
Control module for servo motor (25), the module are used for start and stop, rotation direction and the speed for controlling servomotor (3)；
Stepper motor driver motor is directly used, the input pulse of driver is carried by the impulse generator of a PLC technology
For the regulation of pulse frequency can be achieved；The off line signal and direction control signal of driver, are controlled by MCU, realize that motor is positive and negative
Turn；The common port of driver is directly accessed high level；
Communication module (26), the module is used to adjust acquisition controller (2) and the level of control microcomputer (1) communications protocol will
Ask, meet the hardware requirement mutually communicated, MCU microcontrollers are changed by 485 modules to be connected with computer end USB port, real
Existing PC and MCU 485 protocols, PC ends are realized to 485 module ports by calling the dynamic link that 485 manufacturers provide
Reading and writing, reset etc. operate, and PC and acquisition controller are using shaking hands, send control command status word, acquisition controller response
Communications protocol flow.
The operating process of the consolidation apparatus is as follows：
(1), computer terminal sets the relevant parameter of consolidation test, mainly includes device information, test sample information, experiment
The information such as termination condition, strain rate, loading method are simultaneously sent to data acquisition controller；
(2), computer terminal sends test sign on.
(3), data acquisition controller is by the test parameter pre-set, it is automatic carry out instrument adjustment, precompressed plus off-load,
Record data, test terminate the operating procedures such as differentiation, off-load, tool reset, prompting test end.
(4), test data is transferred to computer terminal, the operation such as carries out data conversion, processing, analyze, collect.
The present invention can have multiple combinations and implementation according to above-mentioned technical principle：
(1), a data acquisition controller can connect separate unit single channel consolidation apparatus, can also connect separate unit multichannel and consolidate
Tie instrument；
(2), continuous loading system (7) can be by the realization of motor driving leading screw, can also be by servo-hydraulic system
System realizes that its installation site can be placed in above test sample from top to bottom to sample loading, can also be placed under test sample
Side is from bottom to top to sample loading；
(3), axial displacement stopping means can be using microswitch (5) is spacing, can also use photoelectrical position sensor
It is spacing, can also be pull-out failure limit method；
(4), DATA REASONING sensor is not limited to profile pattern, is not limited to operation principle, and mode signal output can be electricity
Pressure, electric current, frequency, coding etc., as long as into electric signal can be changed test physical quantity dress, can normally it be identified by data acquisition controller
；
(5), data acquisition controller：
A, automatic control signal instruction can be that the mode such as Embeded CPU, MCU, PLC is realized；
B, RS232,244,485, SPI, USB, IIC, CAN, ether can be used with computer terminal software communication hardware mode
The wire line protocols such as net are realized, the wireless protocols such as WIFI, bluetooth, infrared can also be used to realize；
C, data conversion acquisition module (23) can use the modes such as A/D module, electric frequency modular converter, code identification to realize；
D, power failure protection module (24) modes such as back power supply, embedded battery, farad capacitor can be used to realize, master control core
Piece can be never power down, can also enter power-down mode to reduce power consumption, can also be complete power down, and data storage is forever
The modes such as not power down protect test mode, data not to lose；The module can wake up identification function with or without upper electricity；
E, control module for servo motor (22) can be directly embedded into motor servo driver, can also use power drive
Pipe, apply driving voltage to motor projects according to a certain order, realize that motor operates；Servomotor (3) can be stepping electricity
Machine or DC servo motor；
(6), computer terminal software
A, realize that data, signal etc. interact with data acquisition according to system communication design method, its communication protocol is not done firmly
Property require, as long as can normally be identified by computer terminal and data acquisition unit, the software can be used as host computer, can act also as down
Position machine uses；
B, the function such as data processing, analysis, printing can oneself write method, algorithm, can also directly quote existing chain
Connect storehouse or realized by means of third party software (such as：Excel), the programming language used in software programming can be VB, VC, C#,
Any language such as JAVA, DELPHI, object-C, ECLIPSE and instrument.
The invention provides a kind of possibility, and existing consolidation test side for country's popularization strain controlling continual loading test
Method is compared, and test period can foreshorten to 1/10th or so, can be mitigated the labor intensity of tester significantly, be improved test effect
Rate, while the instrument maximum can apply 20000N vertical load, meet the use demand of deep foundation base engineering.
Claims (4)
- A kind of 1. continuous loading consolidation apparatus of strain controlling for being used to test soil body compressible index, it is characterised in that：Including monitoring Computer (1), acquisition controller (2) and consolidation apparatus main frame, consolidation apparatus main frame are simply supported beam frame structure, and base of frame installation connects Continuous loading system (7), the continuous horizontal cross bar (6) of loading system (7) radially installed one, cross bar (6) upper and lower ends are opened equipped with fine motion Close (5) and play position-limiting action, the container (10) of test sample (20), container (10) side wall dress are placed in screw-threaded shaft elevator (9) upper surface There is sensor for pore water pressure (18) to be connected with test sample (20) bottom by measuring holes (17) to detect test sample (20) generation Pore pressure, simply supported beam top is equipped with big principal stress sensor (4) and displacement transducer (11) to detect test sample (20) Stress degree and axial displacement；Acquisition controller (2) and sensor for pore water pressure (18), big principal stress sensor (4), displacement transducer (11) and microswitch (5) connection and gathered data, the data collected are transferred to monitoring computer (1), in addition, acquisition controller (2) is also with watching Take motor (3) connection and the operation of dynamic control servomotor (3).
- 2. the strain controlling continuous loading consolidation apparatus according to claim 1 for being used to test soil body compressible index, it is special Sign is：Placing the container (10) of test sample (20) includes base (19), and duct (17) are arranged in base (19), in addition, Vent (16), the outer end connection Exhaust screw (15) of vent (16) are additionally provided with base (19)；It is the retaining ring (13) of annular barrel above base (19), the junction of base (19) and retaining ring (13) is provided with O-shaped Sealing ring (14), the upper end of retaining ring (13) are provided with the upper lid (12) of annular, test sample (20) be placed on by base (19) and In the inner chamber that retaining ring (13) is formed, pressure transmission plate (21) is placed in the top of test sample (20).
- 3. the strain controlling continuous loading consolidation apparatus according to claim 1 for being used to test soil body compressible index, it is special Sign is：Continuous loading system (7) is the screw-threaded shaft elevator (7) or hydraulic means of servomotor (3) driving.
- 4. the strain controlling continuous loading consolidation apparatus according to claim 1 for being used to test soil body compressible index, it is special Sign is：Acquisition controller (2) includes：Embedded mmdb source module (22), the module, which is used for closing monitoring computer (1), can perform whole test process automatically；Data conversion acquisition module (23), the module are used for the analog electrical signal for detecting sensor, are converted into data signal；Power failure protection module (24), the module are used in test process after power down, preserve system operation scene, after re-powering, Resume operation scene, continues testing process；Control module for servo motor (25), the module are used for start and stop, rotation direction and the speed for controlling servomotor (3)；Communication module (26), the module are used to adjust acquisition controller (2) and the level demand of control microcomputer (1) communications protocol, Meet the hardware requirement mutually communicated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710830837.2A CN107607387A (en) | 2017-09-15 | 2017-09-15 | A kind of continuous loading consolidation apparatus of strain controlling for being used to test soil body compressible index |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109520833A (en) * | 2018-12-04 | 2019-03-26 | 中航勘察设计研究院有限公司 | A kind of test method of the coral sand second compression coefficient based on vibration environment |
| CN110231457A (en) * | 2019-07-05 | 2019-09-13 | 中冶集团武汉勘察研究院有限公司 | A kind of test macro and method of structured clays elasticity modulus |
| CN110361258A (en) * | 2018-04-10 | 2019-10-22 | 中国矿业大学(北京) | A kind of saturable sliding high-pressure consolidation apparatus device |
| CN113552162A (en) * | 2021-07-15 | 2021-10-26 | 大连理工大学 | CRS temperature control consolidation system and method based on nuclear magnetic scanning |
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| CN102621008A (en) * | 2012-03-13 | 2012-08-01 | 中交水运规划设计院有限公司 | Fully automatic strain control type direct shear test instrument and purpose thereof |
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| CN105043907A (en) * | 2014-12-25 | 2015-11-11 | 高铁检测仪器（东莞）有限公司 | Rubber compression test machine |
| CN205374175U (en) * | 2016-01-25 | 2016-07-06 | 南京土壤仪器厂有限公司 | Novel consolidation apparatus pressurized structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361258A (en) * | 2018-04-10 | 2019-10-22 | 中国矿业大学(北京) | A kind of saturable sliding high-pressure consolidation apparatus device |
| CN109520833A (en) * | 2018-12-04 | 2019-03-26 | 中航勘察设计研究院有限公司 | A kind of test method of the coral sand second compression coefficient based on vibration environment |
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| CN110231457A (en) * | 2019-07-05 | 2019-09-13 | 中冶集团武汉勘察研究院有限公司 | A kind of test macro and method of structured clays elasticity modulus |
| CN110231457B (en) * | 2019-07-05 | 2024-06-28 | 中冶武勘工程技术有限公司 | System and method for testing elastic modulus of structural clay |
| CN113552162A (en) * | 2021-07-15 | 2021-10-26 | 大连理工大学 | CRS temperature control consolidation system and method based on nuclear magnetic scanning |
| CN113552162B (en) * | 2021-07-15 | 2023-01-06 | 大连理工大学 | CRS temperature control consolidation system and method based on nuclear magnetic scanning |
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Application publication date: 20180119 |