CN106546366A - A kind of umbellate form deep hole three-dimensional stress and displacement comprehensive test device - Google Patents

A kind of umbellate form deep hole three-dimensional stress and displacement comprehensive test device Download PDF

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Publication number
CN106546366A
CN106546366A CN201610882290.6A CN201610882290A CN106546366A CN 106546366 A CN106546366 A CN 106546366A CN 201610882290 A CN201610882290 A CN 201610882290A CN 106546366 A CN106546366 A CN 106546366A
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China
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test
umbellate
displacement
dimensional stress
testing
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CN201610882290.6A
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Chinese (zh)
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CN106546366B (en
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刘钦节
华心祝
杨科
李迎富
杨明
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安徽理工大学
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00Measuring arrangements characterised by the use of electric or magnetic means
    • G01B7/02Measuring arrangements characterised by the use of electric or magnetic means for measuring length, width or thickness
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00Measuring or testing not otherwise provided for
    • G01D21/02Measuring two or more variables by means not covered by a single other subclass

Abstract

The present invention relates to engineering investigation prospecting technique field, and in particular to a kind of umbellate form deep hole three-dimensional stress and displacement comprehensive test device, including umbellate form mechanism for testing, displacement transducer, hand-operating pressure pump, test guide rod and signal sampler;The present invention can test the three-dimensional stress size and its measuring point STRESS VARIATION situation and misalignment by artificial Effects on Engineering of multiple positions at different depth in a deep hole simultaneously, be that rock mass engineering project construction, tunnel and chamber maintenance etc. provide important evidence.The invention device, efficiently solves traditional stress measurement and displacement measurement is separate, it is difficult to the problems such as multiple spot is implemented in same drilling, and time-consuming, laborious, costly.The present invention not only realizes a hole multiple spot three-dimensional stress and displacement measurement, and can continuously measure and realize dynamic evaluation function, in addition the features such as device has recyclable recycling, has the advantages that testing cost is cheap, easy to carry, field operation is simple and convenient, data acquisition and control automatization.

Description

A kind of umbellate form deep hole three-dimensional stress and displacement comprehensive test device
Technical field
The present invention relates to engineering investigation prospecting technique field, and in particular to a kind of umbellate form deep hole three-dimensional stress and displacement synthesis Test device.
Background technology
In the Rock And Soil engineering such as mineral resources underground mining, water conservancy and hydropower, vcehicular tunnel and foundation, stress and country rock The timely monitoring analysis of displacement, be to prevent engineering body country rock large deformation, damage, and efficient production with high safety has efficacious prescriptions Method.This is because mine down-hole exploitation and the construction of other rock mass engineering projects will all cause initial rock stress field to change and form new Stress state, around which in a range of rock body produce influence area, occur rock stratum displacement, if this rocks position Shifting timely and effectively can not be controlled, and will cause engineering safety accident after accumulation to a certain extent.Particularly, China's coal-mine exploitation After km is proceeded to deep deep mining, roadway surrounding rock stress level increases rapidly, ore deposit pressure manifests exception, and surrounding rock failure situation is acute Strong, supporting control is difficult.According to incompletely statistics, in the deep mining tunnel of base plate not supporting, roof and floor shift-in amount 2/3~ 3/4 is all caused by pucking, and the road maintenance amount that pucking is caused accounts for the 50% or so of the total maintenance capacity in tunnel.Coal and rock should Power state is directly connected to the deformation in tunnel, destruction, or even the shock hazard of coal and rock, and vertical stress therein is to affect lane Interior crowded principal element is helped in road two, and horizontal stress is then the main cause for causing roof collapse and pucking.Therefore, effective control lane The key issue of road failure and deformation of surrounding rocks be just to determine cause deformation of the surrounding rock in tunnel destruction governing stress state and they Stress, change in displacement situation in coal exploitation process, finds out the main reason of problem, and then exploiting field control is arranged with a definite target in view Apply.However, as rock mass attribute itself is extremely complex, geology of deep part condition and ambient stress are difficult to understand completely in addition, Cannot theoretically carry out accurately calculating analysis or be tested and numerical simulation by laboratory experiment.Therefore, it is quite necessary to The stress intensity and direction of roadway floor primary load-bearing lamina are surveyed, and by floor strata in continuous monitoring production process Stress and change in displacement rule, specify the type and major influence factors of pucking, and then carry out targetedly prophylactico-therapeutic measuress.This Outward, continuing to increase with the rock mass engineering construction scale such as domestic and international water conservancy and hydropower, vcehicular tunnel and foundation and depth of implements, Which is equally faced with the problems such as deformation such as various chambers, tunnel, foundation ditch is big, destruction is serious, to engineering construction progress, follow-up maintenance And operating personnel causes safely extreme influence, or even cause serious industrial accident.Based on this, a kind of convenience is studied fast The higher deep hole stress of victory, low cost, precision and displacement comprehensive test device, with very important realistic meaning and wide Market prospect.
At present, numerous studies have been carried out in terms of drilling hole stress monitoring technology both at home and abroad, has also been reaped rich fruits, successively Propose pressure cushion method, drilling deformation method, borehole strain method, hollow inclusion strain gauge method, hydraulic fracturing etc..However, existing Or excessively complexity, inconvenient operation, the repeatable usability of the sensor structure under technical conditions is poor, or can only test single The stress in direction, and operation difficulty is big, application condition is high.Additionally, borehole stressmeter and displacement meter are typically all separate , single function, and multigroup measurement can not be carried out simultaneously respectively in a hole.Drilling hole stress measurement therein is usually should Power meter is installed in deep blind hole, and need ensure its sensor sensing direction perpendicular to horizontal plane with correct measurement by measuring pressure. But as the direction of stress to be measured is unknown, therefore it is difficult to orient strain gauge sensitive direction during stress test, and only The stress intensity of a direction can be measured.Patent of invention " drilling hole stress sensor and its drilling hole stress monitoring method " (application number: 200910103038.0) disclose a kind of drilling hole stress sensor and its use that core etc. is filled out by metal cylinder, foil gauge, concrete Method, is used in combination by multiple sensors and can realize a hole multimetering, but which is only capable of measuring answering for boring radius direction Power situation of change, it is impossible to which the accurate direction for obtaining surveyed stress can not measure the stress of borehole axial, and be adopted using process Carried out filling out core with concrete, therefore the sensor can not be reclaimed and be reused, it is relatively costly, while exist to measure position The functions such as the change of shifting.Although patent of invention " drill hole vector stress sensor for mine " (application number:201110334090.4) public A kind of sensor including shell, core body and its integrated circuit modules, balance beam sensor and force-measuring nut of cloth, can measure Three direction stress vectors of drilling, but fix as which balances beam length, it is impossible to the drilling of different pore size is readily applied to, and And the change in displacement situation of hole wall country rock can not be measured simultaneously, test function is relatively simple.
The deep displacement of rock mass is that engineers and technicians are very during coal mine roadway, tunnel excavation and dealing with foundation Concern.At present, after the conventional multipoint displacement meter of engineering site is installed, different measuring basic point is recognized by color.Measurement When, measuring point length is first write down, after being subjected to displacement, then the length produced after displacement is measured with ribbon, twice measured value phase Subtract, draw shift value.As the weaker each measuring point identification difficulty of the light of working environment is larger and error rate is higher, measurement process Get up very inconvenient using ribbon measurement, especially under the weaker environment of light and measurement place it is more rugged, make Displacement is measured with ribbon, error is larger, and function is also relatively simple.
To sum up, can conveniently realize up to now automatic diameter changing, a hole multimetering three-dimensional stress and surrounding rock displacement and The comprehensive test device that can be reused, is not temporarily finding specific sale product on the market, is not also finding the text of correlation Offer report.It is an object of the invention to provide a kind of three-dimensional stress of umbellate form reducing deep hole multimetering and displacement integration test dress Put, it solves existing borehole stressmeter and displacement meter is separate, single function, drilling bad adaptability, sensitivity is not high asks Topic, and only for the purpose of the hardware configuration that the device is provided.
The content of the invention
(1) technical problem for solving
For the deficiencies in the prior art, the invention provides a kind of umbellate form deep hole three-dimensional stress and displacement integration test dress Put, it is not high for solving separate existing borehole stressmeter and displacement meter, single function, drilling bad adaptability, sensitivity Problem.
(2) technical scheme
To realize object above, the present invention is achieved by the following technical programs:
A kind of umbellate form deep hole three-dimensional stress and displacement comprehensive test device, including displacement transducer, hand-operating pressure pump, test Guide rod, signal sampler, umbellate form mechanism for testing;The umbellate form mechanism for testing includes that upper arm installs lid, test upper arm, pressure cell peace Binning, test underarm, underarm install slip ring, annular cylinder, cylinder installation seat, connecting screw rod and strain gauge adhesion device;Institute's rheme Displacement sensor is arranged on the termination of the test guide rod by sensor installing plate, and the test guide rod is arranged in gaging hole, The umbellate form mechanism for testing is located on the test guide rod, is additionally provided with displacement measurement steel wire, the handss on the test guide rod Dynamic pressure pump is connected with the umbellate form mechanism for testing by high-pressure hose, the signal sampler by signal cable respectively with institute State umbellate form mechanism for testing to be connected with displacement transducer, the pressure cell is equiped with pressure cell, the strain gauge adhesion in installing storehouse Device is equiped with foil gauge, and the annular cylinder is arranged on the cylinder installation seat, and the annular cylinder is installed with the underarm Slip ring is connected, and described test underarm one end is connected by bolt and underarm installation slip ring, other end is by bolt and institute The center for stating test upper arm is connected, test upper arm one end and the upper arm install lid be connected, other end with it is described Strain gauge adhesion device or pressure cell are installed storehouse and are connected.
Preferably, the umbellate form deep hole three-dimensional stress and displacement comprehensive test device also include orientation small boss, described fixed The upper arm that the umbellate form mechanism for testing is located to small boss is installed on lid and cylinder installation seat.
Preferably, the hand-operating pressure pump is connected with the annular cylinder by high-pressure hose.
Preferably, institute's displacement sensors are linear potentiometer formula displacement transducers, and which passes through potentiometer element by umbellate form Mechanism for testing is converted into linear resistance or voltage output therewith with the mechanical displacement that rock stratum occurs, and is gathered by signal sampler And it is parsed into displacement numeral.
Preferably, the hand-operating pressure pump injects hydraulic pressure by high-pressure hose in the annular cylinder of umbellate form mechanism for testing Oil, forces several test claws of umbellate form mechanism for testing to closely adhere on hole wall rock stratum.
Preferably, check-valves are also equipped with the high-pressure hose that the hand-operating pressure pump is connected, in experimental test procedures The middle backflow for preventing hydraulic oil, it is ensured that test pressure box and foil gauge are fitted on hole wall rock all the time.
Preferably, the test guide rod is into the segmentation is circular by the segmentation circle steel pipe of nipple threaded connection The joint length of steel pipe is 1.5m.
Preferably, the groove that width is the straight-through two ends of 5mm is provided with the axial direction on the segmentation round steel pipe.
Preferably, the upper arm is installed lid, underarm and installs connected by connecting screw rod between slip ring and cylinder installation seat.
(3) beneficial effect
The invention provides a kind of umbellate form deep hole three-dimensional stress and displacement comprehensive test device, the present invention can be deep at one Test the three-dimensional stress size and its measuring point STRESS VARIATION by artificial Effects on Engineering of multiple positions in hole at different depth simultaneously Situation and misalignment, are that rock mass engineering project construction, tunnel and chamber maintenance etc. provide important evidence.The invention device, effectively solves Determined traditional stress measurement and displacement measurement it is separate, it is difficult in same drilling, multiple spot is implemented, and time-consuming, laborious, expense High the problems such as.The present invention not only realizes a hole multiple spot three-dimensional stress and displacement measurement, and can continuously measure realization dynamic Function of Evaluation, the features such as the device has recyclable recycling in addition, with testing cost is cheap, easy to carry, live work Industry is simple and convenient, data acquisition and control automatization the advantages of.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 the structural representation of present invention;
Fig. 2 is the main structure diagram of umbellate form mechanism for testing in Fig. 1;
Fig. 3 is the overlooking the structure diagram of umbellate form mechanism for testing in Fig. 1;
Label in figure is represented respectively:
1- umbellate form mechanism for testing;2- signal samplers;3- signal cables;4- displacement transducers;5- sensor installing plates;6- Test guide rod;7- displacement measurement steel wires;8- high-pressure hoses;9- hand-operating pressure pumps;10- gaging holes;101- upper arm install lid;102- is surveyed Examination upper arm;103- pressure cells install storehouse;104- tests underarm;105- underarms install slip ring;106- annular cylinders;107- oil cylinders are pacified Dress seat;108- connecting screw rods;109- strain gauge adhesion devices;110- orients small boss.
Specific embodiment
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is The a part of embodiment of the present invention, rather than the embodiment of whole.Based on the embodiment in the present invention, those of ordinary skill in the art The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
A kind of deep hole umbellate form three-dimensional stress as shown in Figure 1, Figure 2 and Figure 3 and displacement comprehensive test device, mainly by umbellate form The compositions such as mechanism for testing, displacement transducer, hand-operating pressure pump, test guide rod, signal sampler, umbellate form mechanism for testing is the present invention The key component of device, which mainly includes that upper arm is installed lid, test upper arm, pressure cell and installs storehouse, test underarm, underarm peace The compositions such as dress slip ring, annular cylinder, cylinder installation seat, connecting screw rod, strain gauge adhesion device.Its Main Function principle is to pass through Upper arm is installed lid, underarm installation slip ring and cylinder installation seat and is linked into an integrated entity by connecting screw rod, then overall to be through test guide rod On, when test stress is needed, umbellate form test arm is stretched by high-pressure and hydraulic oil pump is entered annular cylinder using hand-operating pressure pump Go out and tightly press close to gaging hole wall rock.The basic ideas of this structure design are not stretch out same length to change by annular cylinder Four test arm stretching angles, and then adapt to the measurement needs of different boring apertures.Therein, pressure cell installs totally 2, storehouse, is in In the test arm of mutually orthogonal direction, for installing the pressure cell of one of ground test sensors, the pressure cell belongs to into Ripe product, Main Function are to test stress intensity vertically with two orthogonal directions in hole axle plane, by follow-on test Research STRESS VARIATION situation in this direction.It is furnished with strain with the another two test arm of 2 pressure cell test arm relative directions Piece sticker, its Main Function are that foil gauge is pasted on gaging hole wall rock mass parallel to hole axle direction, are easy to test and hole The stress intensity and its situation of change of axle parallel direction.Aforementioned four test arm test data is combined, is divided by calculating Analysis can draw measuring point rock three-dimensional stress size nearby.The displacement transducer of apparatus of the present invention is line conventional on the market at present Property potentiometric displacement transducer, umbellate form mechanism for testing is converted into the mechanical displacement that rock stratum occurs by it by potentiometer element Linear resistance or voltage output, are finally gathered and are parsed into displacement numeral by signal sampler, effectively overcome in the past therewith Ribbon measures the inexactness of displacement, furthermore, it is possible to realize prolonged automatic data collection function.The manual pressure of apparatus of the present invention Usual products on the defeated market of power pump, its purposes are to inject hydraulic pressure by high-pressure hose in the annular cylinder of umbellate form mechanism for testing Oil, forces several test claws of umbellate form mechanism for testing to closely adhere to hole wall rock stratum up.And, coupled high pressure is soft Check-valves are also equipped with pipe, for the backflow for hydraulic oil being prevented in experimental test procedures, it is ensured that test pressure box and foil gauge All the time it is fitted on hole wall rock.It is 1.5m that the test guide rod of apparatus of the present invention is joint length, and is threadedly coupled with nipple Segmentation round steel pipe.The purpose connected using nipple, is that the smooth outer surface for ensureing guide rod disclosure satisfy that umbellate form test machine Can flexibly sliding during the test strata displacement of structure.Additionally, for the needs of different test arms orientation, it is necessary to the edge on every steel pipe Axis direction cuts out the groove at the straight-through two ends of a width about 5mm, is easy to install lid, underarm peace with each upper arm of umbellate form mechanism for testing Boss on dress slip ring and cylinder installation seat coordinates, and plays a part of sensor orientation, while and can meet umbellate form mechanism for testing Can slide up and down along guide rod.
Action principle is 2 pressure cells to be loaded pressure cell installation storehouse respectively first and 2 foil gauges load foil gauges and glue On patch device, and connect dependence test wire;Then, by umbellate form mechanism for testing according to specific direction (orientation boss and guide rod groove Coordinate and determine) it is through on test guide rod, depth to be measured is transferred to by displacement measurement steel wire, is then passed through using hand-operating pressure pump High-pressure hose injection high-pressure oil forces the test arm of its four direction tightly to be pasted to the annular cylinder of umbellate form mechanism for testing Close on hole wall to be measured, the check-valves finally closed on high-pressure hose, connection signal transmission cable to signal sampler can enter Row test stress is tested.Therein, 2 pressure cell tests are big with two orthogonal direction stress on gaging hole axis vertical plane Little, the foil gauge of two other parallel hole direction of principal axis arrangement is used to test and the strain size in hole axle parallel direction, Jin Erji Calculation draws the axial stress intensity in hole, and the analysis of aforementioned two groups of Data Synthesis can be obtained a measuring point, and nearby three-dimensional stress is big It is little.When needing to test measuring point rock displacement nearby simultaneously, only the upper end of displacement measurement steel wire need to be connected with linear movement pick-up Tension is connect, and the output lead of displacement transducer is connected to into signal sampler, its cardinal principle is by displacement transducer mounting seat Be connected with test guide rod, and test guide rod is deep into bottom hole, as gaging hole is deeper, therefore bottom hole rock stratum can be approximately considered and do not sent out Raw displacement, therefore, the position of rock stratum near measuring point is drawn by only need to measuring the relative displacement that measuring point goes out between rock stratum and bottom hole Move.The major advantage of the method is, by sensor by linear displacement be converted into can automatic data collection, process and computing telecommunications Number, and preserve in time, not only measuring accuracy is high, and recognize measuring point difficulty during being not easy manual measurement occur and Caused possible error.And, measuring point is with the strain gauge being fastened on hole wall rock stratum while effect, can complete stress and position While shifting, work continuously.If multiple same test devices are used in combination, you can realize the function of a hole multimetering.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality Body or operation are made a distinction with another entity or operation, and are not necessarily required or implied these entities or deposit between operating In any this actual relation or order.And, term " including ", "comprising" or its any other variant are intended to Nonexcludability is included, so that a series of process, method, article or equipment including key elements not only will including those Element, but also including other key elements being not expressly set out, or also include for this process, method, article or equipment Intrinsic key element.In the absence of more restrictions, the key element for being limited by sentence "including a ...", it is not excluded that Also there is other identical element in process, method, article or equipment including the key element.
Above example only to illustrate technical scheme, rather than a limitation;Although with reference to the foregoing embodiments The present invention has been described in detail, it will be understood by those within the art that:Which still can be to aforementioned each enforcement Technical scheme described in example is modified, or carries out equivalent to which part technical characteristic;And these modification or Replace, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (9)

1. a kind of umbellate form deep hole three-dimensional stress and displacement comprehensive test device, including displacement transducer, hand-operating pressure pump, test lead Bar and signal sampler, it is characterised in that:Including umbellate form mechanism for testing;The umbellate form mechanism for testing includes that upper arm is installed lid, surveyed Examination upper arm, pressure cell install storehouse, test underarm, underarm installation slip ring, annular cylinder, cylinder installation seat, connecting screw rod and strain Piece gummer;Institute's displacement sensors are arranged on the termination of the test guide rod by sensor installing plate, and the test is led Bar is arranged in gaging hole, and the umbellate form mechanism for testing is located on the test guide rod, is additionally provided with displacement on the test guide rod Test steel wire, the hand-operating pressure pump are connected with the umbellate form mechanism for testing by high-pressure hose, and the signal sampler passes through Signal cable is connected with the umbellate form mechanism for testing and displacement transducer respectively, and the pressure cell is equiped with pressure in installing storehouse Box, the strain gauge adhesion device are equiped with foil gauge, and the annular cylinder is arranged on the cylinder installation seat, the annular oil Cylinder and the underarm are installed slip ring and are connected, and described test underarm one end passes through bolt and underarm installation slip ring is connected, in addition One end is connected with the center of the test upper arm by bolt, and lid phase is installed with the upper arm in described test upper arm one end Even, other end is installed storehouse with the strain gauge adhesion device or pressure cell and is connected.
2. umbellate form deep hole three-dimensional stress according to claim 1 and displacement comprehensive test device, it is characterised in that:The umbrella Moldeed depth hole three-dimensional stress and displacement comprehensive test device also include orientation small boss, and the orientation small boss is located at the umbellate form and surveys The upper arm of test-run a machine structure is installed on lid and cylinder installation seat.
3. umbellate form deep hole three-dimensional stress according to claim 1 and displacement comprehensive test device, it is characterised in that:The handss Dynamic pressure pump is connected with the annular cylinder by high-pressure hose.
4. umbellate form deep hole three-dimensional stress according to claim 1 and displacement comprehensive test device, it is characterised in that:Institute's rheme Displacement sensor is linear potentiometer formula displacement transducer, and which passes through the machine that umbellate form mechanism for testing is occurred by potentiometer element with rock stratum Tool displacement is converted into linear resistance or voltage output therewith, and is gathered by signal sampler and be parsed into displacement numeral.
5. umbellate form deep hole three-dimensional stress according to claim 1 and displacement comprehensive test device, it is characterised in that:The handss Dynamic pressure pump injects hydraulic oil by high-pressure hose in the annular cylinder of umbellate form mechanism for testing, forces the several of umbellate form mechanism for testing Individual test claw is closely adhered on hole wall rock stratum.
6. umbellate form deep hole three-dimensional stress according to claim 1 and displacement comprehensive test device, it is characterised in that:The handss Dynamic pressure pump be connected high-pressure hose on be also equipped with check-valves, in experimental test procedures prevent hydraulic oil backflow, really Protect test pressure box and foil gauge is fitted on hole wall rock all the time.
7. umbellate form deep hole three-dimensional stress according to claim 1 and displacement comprehensive test device, it is characterised in that:The survey Examination guide rod is into the joint length of the segmentation round steel pipe is 1.5m by the segmentation circle steel pipe of nipple threaded connection.
8. umbellate form deep hole three-dimensional stress according to claim 7 and displacement comprehensive test device, it is characterised in that:Described point It is provided with the groove that width is the straight-through two ends of 5mm on section round steel pipe in the axial direction.
9. umbellate form deep hole three-dimensional stress according to claim 1 and displacement comprehensive test device, it is characterised in that:On described Arm is installed lid, underarm and installs connected by connecting screw rod between slip ring and cylinder installation seat.
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CN106546359A (en) * 2016-11-24 2017-03-29 中国矿业大学 A kind of surrouding rock stress measuring system
CN107063512A (en) * 2017-04-18 2017-08-18 中国科学院寒区旱区环境与工程研究所 Ice body internal stress deformation detecting method and system
CN110530255A (en) * 2019-09-04 2019-12-03 中国电建集团中南勘测设计研究院有限公司 A kind of detecting earth stress rubber V shape triaxial strain meter cable connecting device, triaxial strain meter and its application method
CN110763287A (en) * 2019-12-06 2020-02-07 盐城市兆泉项目管理有限公司 Umbrella-shaped deep hole three-dimensional stress and displacement comprehensive testing device

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CN110530255A (en) * 2019-09-04 2019-12-03 中国电建集团中南勘测设计研究院有限公司 A kind of detecting earth stress rubber V shape triaxial strain meter cable connecting device, triaxial strain meter and its application method
CN110763287A (en) * 2019-12-06 2020-02-07 盐城市兆泉项目管理有限公司 Umbrella-shaped deep hole three-dimensional stress and displacement comprehensive testing device

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