CN102606149A - Storage type geostress testing method and storage type geostress testing device by means of hole-wall strain method - Google Patents
Storage type geostress testing method and storage type geostress testing device by means of hole-wall strain method Download PDFInfo
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- CN102606149A CN102606149A CN2012100767601A CN201210076760A CN102606149A CN 102606149 A CN102606149 A CN 102606149A CN 2012100767601 A CN2012100767601 A CN 2012100767601A CN 201210076760 A CN201210076760 A CN 201210076760A CN 102606149 A CN102606149 A CN 102606149A
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Abstract
The invention discloses a storage type geostress testing method and a storage type geostress testing device by means of a hole-wall strain method. Acquisition and storage of data are implemented underground in a centralized manner, and the data can be automatically acquired and stored in a release process so that testing whole-process data are obtained. The method includes the steps of installation of a strain gauge, acquisition and control of underground data and ground data processing, and includes the detailed steps: firstly, placing an instrument capsule into an installer, hermetically welding the instrument capsule with a strain gauge line, placing the installer into a testing drill hole, unlocking the installer and the instrument capsule, leading the installer to drive a central push rod to squeeze glue water out and fill the glue water into a clearance between the strain gauge and a hole wall, completing installation of the strain gauge after the glue water is coagulated, leading the installer to be disconnected with the instrument capsule, and recovering the installer onto the ground; secondly, in the underground testing drill hole, leading a data acquisition and control system packaged in the instrument capsule to acquire and store testing temperature sensing signals, strain gauge bearing signals and strain data, and is connected with a ground data processing system; and thirdly, utilizing a ground data processing computer to control parameter setting of an underground device and reading and outputting the data.
Description
Technical field
The present invention relates to a kind of method and testing arrangement of on-the-spot test rock mass triaxiality, especially the testing experiment of Test in Situ hole wall Strain Method geostatic stress belongs to rock mass mechanics test field.
Background technology
The deep underground construction that need build in fields such as water conservancy and hydropower, mine, traffic increases day by day.Increase along with the degree of depth; Geostatic stress increases, geological conditions worsens, fragmented rock body increases, head pressure and water yield strengthens, factors such as temperature rise manifest; Be the stress parameters of engineering rock mass under mechanical characteristic, the especially condition of high ground stress of research deep engineering rock mass, comparatively direct, economic approach is to carry out the test of Test in Situ triaxiality; Obtain rock mass stress parameter under the complex geological condition through test, so that guaranteeing engineering long-time stability and long-term operation security.
At present traditional " hole wall Strain Method method " rock mass triaxiality test is distinguished with MTD, can be divided into that shallow bore hole is separated division and deep hole is separated division.Shallow bore hole is separated division and is adopted artificial mounting means, and foil gauge links to each other through data cable with the topside readout appearance all the time in the process of the test, and this method can obtain removing the overall process data.In view of the manpower limit, this method general measure hole depth is no more than 20m, therefore can only obtain near the footrill or the test data on shallow top layer, rock stratum.This method can obtain complete process of the test data; But can only obtain near the footrill or the test data on shallow top layer, rock stratum, and the test process cable needs pass through the drilling rod centre bore, process of the test is loaded down with trivial details.
Deep hole is separated division test and is adopted special-purpose erector that strain meter is installed in the test hole, wait the glue condensation cure after, read and cut off strain meter behind the initial reading and connect, and the lifting erector with cable.After the cover core is removed strain meter and erector are welded and read releasing back data again.This method surveying record reaches more than the 500m, but can't obtain removing process data.Wherein erector promotes needs to adopt multicore load-bearing cable, and line attachment is long, and test link equipment is many, makes measuring result error bigger.This method is to enlarge to understand division measurement hole depth scope; But only can obtain removing the fore-and-aft survey data, and multicore load-bearing cable is comparatively heavy and make measure error bigger.
The problem that test exists in view of the Test in Situ triaxiality, the deep hole test is subject to the influence of testing circumstance apparatus factor, directly influences reliability, stability and the degree of accuracy of measuring technology.To the conditional request of the test rock mass degree of depth, improve downhole stored formula hole wall Strain Method geostatic stress method of testing, accomplish test data collection, be stored in one; Obtain testing the overall process data to satisfy, and multicore load-bearing cable is comparatively heavy, circuit is longer; Test link equipment is many; Making measuring result error bigger, remaining shortcoming aspect the accurate precision of control test, all is the problem that present rock mass triaxiality is tested required solution.
Summary of the invention
The objective of the invention is in order to overcome the defective of prior art; A kind of Test in Situ deep hole memory-type hole wall Strain Method geostatic stress method of testing and testing arrangement are provided; Data acquisition and be stored in the down-hole and concentrate realize that the releasing process can be gathered and store automatically, obtains testing the overall process data.
The present invention solves its technical problem and adopts following technical scheme: a kind of memory-type hole wall Strain Method geostatic stress method of testing, mainly comprise strain meter installation, downhole data acquisition controlling, aboveground data processing step, and concrete grammar is following:
1) strain meter is installed: instrument room is put into erector, and instrument room and strain meter circuit welded seal are pulled out the erector contact pilotage; The strain meter piston contacts with the erector center-pole, and injecting glue in the strain meter is put into test drilling with erector; Erector and instrument room release, erector top inertia drive center push rod and continue strain meter and hole wall gap are extruded and be filled in to glue downwards; After dehydration is condensed, the strain meter installation, erector is thrown off and the connecting and reclaim ground of instrument room;
2) downhole data acquisition controlling: in the test drilling, be encapsulated in data acquisition control system in the instrument room make an experiment temperature sensor signal, strain meter bearing signal and strain data collection and storage, accept and carry out aboveground data handling system instruction;
3) aboveground data: the computer of data processing software is installed, connects the row communication of going forward side by side with the instrument storehouse, the parameter setting of control well lower device and read data and output.
The said data acquisition control system that is encapsulated in the instrument room is by the data acquisition of Single-chip Controlling temperature sensor signal, bearing signal and strain sensing signal; Carry out the strain signal amplification filtering and handle and store, and carry out communication and command process with aboveground data handling system.
The said strain transducer that is encapsulated in data acquisition control system in the instrument room inserts the strain measurement full-bridge circuit; And automatically switch and measure each foil gauge; And the cut-in operation bridge circuit, store circuit switches the back circuit signal setting to read in blanking time, deposits in the memory after the digital-to-analogue conversion.
The computer of said aboveground data handling system installs that supporting programming software carries out communication instruction, gathers setting, calibration testing and data read.
A kind of memory-type hole wall Strain Method geostatic stress testing arrangement mainly comprises strain meter installation system, downhole data acquisition control system, aboveground data handling system;
Wherein, The strain meter installation system is put into erector by instrument room, and instrument room and strain meter circuit welded seal, erector center-pole stretch into instrument room and contact with the strain meter piston; Injecting glue in the strain meter; Extrude glue and be filled in strain meter and hole wall gap, be with unlocking device and extensible member on the erector center-pole, contact pilotage is arranged at the erector bottom;
And the downhole data acquisition control system is that temperature pick up, aspect sensor insert single-chip microcomputer, and single-chip microcomputer connects storage of processor, and strain transducer connects with the signals collecting amplification treatment circuit, and the access single-chip microcomputer, is encapsulated in the instrument room.
And aboveground data handling system is that the computer that data processing software is installed connects with the interior single-chip microcomputer of instrument room.
And the strain transducer of said downhole data acquisition control system is that foil gauge is formed the measurement full-bridge circuit, and the foil gauge of reference bridge is attached on the collecting circuit board of instrument room.
The bearing signal and the strain signal of said downhole data acquisition control system are used AD converter.
Said downhole data acquisition control system connects chargeable power supply.
The present invention compared with prior art also has following major advantage:
1, because memory-type hole wall Strain Method geostatic stress method of testing of the present invention; Dividing three steps to accomplish by strain meter installation system, downhole data acquisition control system, aboveground data handling system respectively tests; Data acquisition and storage narrow down to the down-hole and concentrate to realize, obtain testing the overall process data, avoid in existing " hole wall Strain Method " shallow bore hole to separate division and separate division with deep hole and have problems; The test of Test in Situ deep hole; Having solved the releasing process can gather and store automatically, collects data acquisition and is stored in one, has increased the reliability and the degree of accuracy of measuring technology.
2, because strain meter installation system of the present invention adopts strain meter is fixed on the deep hole down-hole; And strain transducer is installed on the strain meter; And at installation, the injecting glue of accomplishing strain meter; The glue back of condensing is thrown off connecting of erector and instrument room and is reclaimed ground, makes data acquisition and storage control system in the strain meter accomplish testing experiment in the down-hole.
3, because the present invention adopts the strain meter installation system; The collection and the storage of temperature pick up, electronic compass, data processing and control circuit completion test temperature transducing signal, bearing signal are set in the acquisition control system instrument room of down-hole; Accomplish deep hole scene temperature, orientation test; Can study the influence of ground temperature to geostatic stress and test process; Can temperature in the instrument room be gathered and stored, and adopt the high-precision AD conversion of circuit signal and electronic compass signal, can guarantee data acquisition after data enough accuracy are arranged.
4, be that foil gauge is formed the measurement full-bridge circuit owing to the present invention is provided with strain transducer in acquisition control system; And foil gauge is attached on the collecting circuit board of instrument room, when measuring the strain value of each foil gauge, with the communication and the command process of computer; Corresponding foil gauge cut-in operation bridge circuit can automatically switch; Amplify to filter control circuit through data and handle, carry out various test store circuits and switch the back circuit signal setting to read in blanking time, deposit in the memory after the digital-to-analogue conversion.
5,, since the present invention adopt aboveground data handling system, supporting programming software is installed in the computer, carries out communication instruction through serial ports and instrument room, the down-hole can be gathered setting, calibration testing and data and read.
6, because the present invention adopts the power supply of aluminum cell group, guarantee the stability of tester, can ensure the one whole measurement, can be in continuous operation under the maximum working load above 12 hours.
7, because the present invention adopts acquisition control system under the interior mounting shaft of instrument room, and main control chip adopts single-chip microcomputer, the speed of service can ensure complicated data and computing; The parameter storage adopts big memory space to be used for depositing parameter and experimental data storage chip, and the memory space of 512K is used for depositing parameter and experimental data altogether, ensure that memory space is enough, and the frequency acquisition memory space can use the enough time.
Description of drawings
Fig. 1 strain meter installation system of the present invention down-hole erector sketch map.
Fig. 2 memory-type hole wall of the present invention Strain Method geostatic stress method of testing workflow diagram
Fig. 3 downhole data acquisition control system of the present invention data acquisition storage measuring circuit schematic diagram.
Fig. 4 downhole data acquisition control system of the present invention is counted the harvester fundamental diagram.
The aboveground data handling system software kit of Fig. 5 the present invention program flow diagram.
Erector (1), borehole wall (2), test drilling (3), instrument room (4), contact pilotage (5), strain meter (6), strain meter piston (6 '), sealing ring (7), small bore (8), extensible member (9), unlocking device (10), center push rod (11).
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Memory-type hole wall Strain Method geostatic stress method of testing of the present invention comprises strain meter installation, downhole data acquisition controlling, aboveground data processing step.At first be the installation of carrying out strain meter, carry out downhole data acquisition control system data acquisition storage besides, and the data acquisition and the storage of the process of releasing, be that reading with other test parameters of aboveground data data carried out stress calculation at last.
See Fig. 1, Fig. 2, memory-type hole wall Strain Method geostatic stress method of testing: the installation of strain meter is realized by erector.Test should choose the test drilling degree of depth before installing, and boring (3) is ready.Strain meter installation system () is put into erector (1) by instrument room (4); Instrument room (4) and strain meter (6) circuit welded seal; Erector center-pole (11) stretches into instrument room (4) and contacts with strain meter piston (6 '); Injecting glue in the strain meter (6) is with unlocking device (10) and extensible member (9) on the erector center-pole (11), contact pilotage (5) is arranged at erector (1) bottom.
Strain meter is put into erector with instrument room before installing, and instrument room (4) should charge in advance; Instrument room and strain meter circuit welded seal are pulled out the erector contact pilotage, and the strain meter piston contacts with the erector center-pole; Extensible member (9), unlocking device (10) can automatically lock instrument room; Injecting glue in the strain meter, more than action is put into test drilling (3) with erector after accomplishing successively, lets the erector free-falling perhaps at the uniform velocity descend and discharges wire rope;
Erector is put into test drilling; In the time of at the bottom of erector is near the hole, strain meter at first gets in the test small bore (8) under the guiding of guide head, and then the erector contact pilotage touches at the bottom of test drilling (3) hole; Drive the action of extensible member (9) and unlocking device (10), with erector and instrument room release; After strain meter is in place; The center push rod (11) that drives erector top inertia continues action downwards, and the gap of strain meter and hole wall between the sealing ring (7) is extruded and be filled in to glue, dewater condense after; The strain meter installation action erector that is all over continues to be parked at the bottom of the hole; Just can promote after glue is fixed, the strain meter installation, erector is thrown off and the connecting and reclaim ground of instrument room.
See Fig. 3, Fig. 4, the downhole data acquisition controlling in test drilling, is encapsulated in data acquisition control system in the instrument room make an experiment temperature sensor signal, strain meter bearing signal and strain data collection and storage.
The downhole data acquisition control system is that temperature pick up, aspect sensor insert single-chip microcomputer, and single-chip microcomputer connects storage of processor, and strain transducer connects with the signals collecting amplification treatment circuit, and the access single-chip microcomputer, is encapsulated in the instrument room; Data acquisition control system is carried out the strain signal amplification filtering and handles and store, and carried out communication and command process with aboveground data handling system by the data acquisition of Single-chip Controlling temperature sensor signal, bearing signal and strain sensing signal; Strain transducer is that foil gauge is formed the measurement full-bridge circuit; Foil gauge is attached on the collecting circuit board of instrument room, automaticallyes switch to measure each foil gauge, and the cut-in operation bridge circuit; Store circuit switches the back circuit signal setting to read in blanking time, deposits in the memory after the digital-to-analogue conversion.
Downhole data acquisition controlling strain measurement bridge adopts full-bridge circuit, forms one road full-bridge and nine tunnel (can expand according to the foil gauge quantity that encapsulates in the strain meter) change bridge by 13 identical foil gauges of sensitivity coefficient and measures, and is as shown in Figure 3.Wherein by R0, Ra, Rb; Rc forms 0 road full-bridge (four strain resistors have identical material and sensitivity); Because these four foil gauges all are attached on the collecting circuit board of instrument room, can not deform, its bridge circuit output is caused by environment such as external temperature, humidity and pressure entirely.When measuring the strain value of each foil gauge, switch corresponding foil gauge (replace R0) cut-in operation bridge circuit, store circuit switches the back circuit signal setting to read in blanking time, deposits in the memory after the digital-to-analogue conversion.
Downhole data acquisition control system power supply can fill aluminum cell by 8 and form 4*2 capacity aluminum cell group power supply, and the aluminum cell group can ensure that one whole measures (can in continuous operation under the maximum working load above 12 hours); Measure in the bridge circuit, the variation that the input bridge is pressed can cause the variation of the signal of measuring output, thereby causes measure error.The native system bridge presses voltage stabilizing to adopt high accuracy low temperature ticket chip to provide stable+2.000V bridge circuit voltage, and the precision resister difference through 2 0.1% goes out the benchmark that 1.000V voltage is done the AD conversion simultaneously.
The main control chip of down-hole acquisition control system adopts single-chip microcomputer, is based on 8 single-chip microcomputers of high speed of 8051 kernels, and under the 1T mode of operation, the speed of service can ensure complicated data and computing; 16 high-precision AD converters are adopted in the collection AD of circuit signal and electronic compass signal conversion, can guarantee data acquisition after data enough accuracy are arranged.
See Fig. 5, aboveground data handling system: aboveground data handling system is that the computer that data processing software is installed connects with the interior single-chip microcomputer of instrument room; Portable or carry out communication in the computer through serial ports and instrument storehouse, the parameter setting of control well lower device and read data.This system program design adopts C language and assembler language to mix and writes.
Computer control system is waited for the host computer signal, detects battery electric quantity, sends battery allowance information; Test connects signal, and the concurrent answer signal that send is set successfully, gives host computer; The sampling time signal is set, sends and answer signal is set to host computer; Send acquired signal, image data, judge whether memory is full, wait for the host computer signal, whether host computer has new order, carries out image data again; Gather and accomplish, read the image data signal, send data to host computer, whether judgment data sends finishes, and the host computer acknowledge(ment) signal finishes, and whether host computer has newer command.Programming language is accomplished the data of downhole data collection storage in the instrument room.
Claims (9)
1. memory-type hole wall Strain Method geostatic stress method of testing, it is characterized in that: comprise strain meter installation, downhole data acquisition controlling, aboveground data processing step, concrete grammar is following:
1) strain meter is installed: instrument room is put into erector, and instrument room and strain meter circuit welded seal are pulled out the erector contact pilotage; The strain meter piston contacts with the erector center-pole, and injecting glue in the strain meter is put into test drilling with erector; Erector and instrument room release, erector top inertia drive center push rod and continue strain meter and hole wall gap are extruded and be filled in to glue downwards; After dehydration is condensed, the strain meter installation, erector is thrown off and the connecting and reclaim ground of instrument room;
2) downhole data acquisition controlling: in the test drilling, the data acquisition control system that is encapsulated in the instrument room carries out temperature sensor signal, strain meter bearing signal and strain data collection and storage, accepts and carry out aboveground data handling system instruction;
3) aboveground data: the computer of data processing software is installed, connects the row communication of going forward side by side with the instrument storehouse, the parameter setting of control well lower device and read data and output.
2. a kind of memory-type hole wall Strain Method geostatic stress method of testing according to claim 1; It is characterized in that: the said data acquisition control system that is encapsulated in the instrument room is by the data acquisition of Single-chip Controlling temperature sensor signal, bearing signal and strain sensing signal; Carry out the strain signal amplification filtering and handle and store, and carry out communication and command process with aboveground data handling system.
3. a kind of memory-type hole wall Strain Method geostatic stress method of testing according to claim 1; It is characterized in that: the said strain transducer that is encapsulated in data acquisition control system in the instrument room inserts the strain measurement full-bridge circuit; And automatically switch and measure each foil gauge; And the cut-in operation bridge circuit, store circuit switches the back circuit signal setting to read in blanking time, deposits in the memory after the digital-to-analogue conversion.
4. a kind of memory-type hole wall Strain Method geostatic stress method of testing according to claim 1 is characterized in that: the computer of said aboveground data handling system installs that supporting programming software carries out communication instruction, gathers setting, calibration testing and data read.
5. a memory-type hole wall Strain Method geostatic stress testing arrangement is characterized in that: comprise strain meter installation system, downhole data acquisition control system, aboveground data handling system;
Wherein, The strain meter installation system is put into erector (1) by instrument room (4), instrument room (4) and strain meter (6) circuit welded seal, and erector center-pole (11) stretches into instrument room (4) and contacts with strain meter piston (6 '); Injecting glue in the strain meter (6); Extrude glue and be filled in strain meter (6) and hole wall (2) gap, be with unlocking device (10) and extensible member (9) on the erector center-pole (11), contact pilotage (5) is arranged at erector (1) bottom;
The downhole data acquisition control system is that temperature pick up, aspect sensor insert single-chip microcomputer, and single-chip microcomputer connects storage of processor, and strain transducer connects with the signals collecting amplification treatment circuit, and the access single-chip microcomputer, is encapsulated in the instrument room.
6. testing arrangement according to claim 5 is characterized in that: aboveground data handling system is that the computer that data processing software is installed connects with the interior single-chip microcomputer of instrument room.
7. testing arrangement according to claim 5 is characterized in that: the strain transducer of said downhole data acquisition control system is that foil gauge is formed the measurement full-bridge circuit, and the foil gauge of reference bridge is attached on the collecting circuit board of instrument room.
8. a kind of memory-type hole wall Strain Method geostatic stress testing arrangement according to claim 5, it is characterized in that: the bearing signal and the strain signal of said downhole data acquisition control system are used AD converter.
9. a kind of memory-type hole wall Strain Method geostatic stress testing arrangement according to claim 5, it is characterized in that: said downhole data acquisition control system connects chargeable power supply.
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| CN104215364A (en) * | 2014-07-15 | 2014-12-17 | 安徽理工大学 | Self-propelled diameter-variable stress rosette pasting device used for geostress measuring |
| CN105781526A (en) * | 2014-12-24 | 2016-07-20 | 中国石油天然气股份有限公司 | Stress testing device and stress testing method for pipe column of water injection well |
| CN107588877A (en) * | 2017-10-15 | 2018-01-16 | 安徽理工大学 | A kind of recyclable geostress survey device |
| CN108414129A (en) * | 2018-04-02 | 2018-08-17 | 长江水利委员会长江科学院 | The direct patch crustal stress of half backpack body releases test device and method |
| CN110031044A (en) * | 2019-05-17 | 2019-07-19 | 中国地震局地壳应力研究所 | A kind of adaptive borehole stress and strain probe of internal pressure |
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| CN103790582A (en) * | 2014-01-26 | 2014-05-14 | 北京雷雨达科技有限公司 | Geostress measuring device and method |
| CN104215364A (en) * | 2014-07-15 | 2014-12-17 | 安徽理工大学 | Self-propelled diameter-variable stress rosette pasting device used for geostress measuring |
| CN104215364B (en) * | 2014-07-15 | 2016-08-31 | 安徽理工大学 | A kind of strain rosette sticker of reducing voluntarily for geostress survey |
| CN105781526A (en) * | 2014-12-24 | 2016-07-20 | 中国石油天然气股份有限公司 | Stress testing device and stress testing method for pipe column of water injection well |
| CN110998061A (en) * | 2017-07-21 | 2020-04-10 | 通用电气(Ge)贝克休斯有限责任公司 | Downhole electronics package with integrated components formed by layer deposition |
| CN107588877A (en) * | 2017-10-15 | 2018-01-16 | 安徽理工大学 | A kind of recyclable geostress survey device |
| CN108414129A (en) * | 2018-04-02 | 2018-08-17 | 长江水利委员会长江科学院 | The direct patch crustal stress of half backpack body releases test device and method |
| CN108414129B (en) * | 2018-04-02 | 2023-07-14 | 长江水利委员会长江科学院 | Device and method for testing relief of direct patch ground stress of semi-enclosure |
| CN110031044A (en) * | 2019-05-17 | 2019-07-19 | 中国地震局地壳应力研究所 | A kind of adaptive borehole stress and strain probe of internal pressure |
| CN110031044B (en) * | 2019-05-17 | 2023-11-10 | 应急管理部国家自然灾害防治研究院 | Internal pressure self-adaptive drilling stress strain probe |
| CN110595657A (en) * | 2019-09-23 | 2019-12-20 | 煤炭科学技术研究院有限公司 | Small-aperture 16-component conical strain gauge |
| CN115541064A (en) * | 2022-11-24 | 2022-12-30 | 云南省交通投资建设集团有限公司 | Stress monitoring probe and method suitable for high-ground-stress tunnel chaplet surface |
| CN115541064B (en) * | 2022-11-24 | 2023-03-10 | 云南省交通投资建设集团有限公司 | Stress monitoring probe and method suitable for high-ground-stress tunnel chaplet surface |
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Application publication date: 20120725 |