CN100547401C - Test instrument for shrinking and deforming of road surface material - Google Patents
Test instrument for shrinking and deforming of road surface material Download PDFInfo
- Publication number
- CN100547401C CN100547401C CNB2005100227247A CN200510022724A CN100547401C CN 100547401 C CN100547401 C CN 100547401C CN B2005100227247 A CNB2005100227247 A CN B2005100227247A CN 200510022724 A CN200510022724 A CN 200510022724A CN 100547401 C CN100547401 C CN 100547401C
- Authority
- CN
- China
- Prior art keywords
- environmental cabinet
- surface material
- shrinking
- deforming
- road surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
A kind of test instrument for shrinking and deforming of road surface material, on support, be located at the environmental cabinet that heat-insulation layer is installed in the interlayer, be installed in the compressor on the vibroshock, A/D converter, industrial control computer, printer, at least be provided with 1 bearing sensor on the crossbeam, in the interlayer of environmental cabinet or in the environmental cabinet, establish condenser pipe, in environmental cabinet, establish temperature sensor, heating tube and fan, at least be provided with the sample stent that 1 lower end is arranged on the test specimen placed on the bearing sensor, at least be provided with 1 and the corresponding displacement sensor bracket of sample stent on the upper surface outside environmental cabinet, the displacement transducer that is with sleeve pipe outward is arranged on the displacement sensor bracket, the lower end of displacement transducer is provided with the conductive bar that outer cover is equipped with sleeve pipe, in the test specimen upper surface backing plate is set.That the present invention has is reasonable in design, the data of surveying accurately, the automaticity advantages of higher, can be used for testing the contraction coefficient of ground surface material, analyze cracking resistance, the deformation characteristic of ground surface material.
Description
Technical field
The invention belongs to the making in road or other similar structures paving, machine, instrument or the utility appliance technical field of reparation usefulness, be specifically related to test instrument for shrinking and deforming of road surface material.
Background technology
China just uses semi-rigid material as sub-surface since the fifties, and be the semi-rigid material of representative account for each standard highway road surface base layer material consumption 95% or more with cement stabilizing material and lime, flyash stabilizing material so far the nineties.From pavement performance, its unique advantage is arranged based on the stabilized with inorganic binder basic unit of lime, cement.In addition, in use for many years, design, unit in charge of construction have accumulated and have much utilized inorganic binder to build the experience of basic unit, and therefore, semi-rigid sub-base material still can be occupied an leading position in China's road basement material for a comparatively long period of time.Semi-rigid asphalt pavement is with its high strength, good flatness and driving comfort, become the principal mode of China Higher level pavement structure, in use there are some problems in semi-rigid sub-base material, self has temperature semi-rigid material, moisture sensitivity, when starting material are selected and mix material proportioning designed not at that time, the crack appears in semi-rigid type base easily, basic crack tends to expand to surface layer and forms reflection crack, the existence in crack not only makes the vehicle ' quality descend, and destroyed pavement structure, globality and continuity, and cause the weakening (crack place flexure is big, and the modulus of resilience reduces) of structural strength to a certain extent.Along with the immersion of rain, snow-broth, make basic unit's deliquescing, under the effect repeatedly of a large amount of traffic loads, cause pavement strength to reduce greatly, generation is washed away, and purt mud phenomenon influences the serviceable life and the quality on road surface.Therefore, the research of semi-rigid material is remained to be continued deeply, contract coefficient, the coefficient of shrinkage of the temperature of semi-rigid sub-base material can be judged the deformability of material in temperature, humidity change procedure effectively.The contraction coefficient of semi-rigid sub-base material can reflect the size of material contracts distortion, is one of important parameter of estimating cracking resistance, is the important evidence of ground surface material structural design.
Because the drawdown deformation order of magnitude of inorganic stable class semi-rigid sub-base material is very little, there is defective in test unit, the test method disunity, the result that feasible test draws does not have comparability, although this has been carried out many researchs for many years both at home and abroad, but still do not draw feasible index, therefore, at present still with single compressive strength as index.
The test method that adopts is different with condition, shrinkage to commaterial is tested, the material temperature contraction coefficient that draws, dry contraction coefficient numerical value are also different, this situation is unfavorable for the comparison of great number tested data and the summary of rule, for the further practical application of semi-rigid sub-base material cracking resistance design objective has brought very big difficulty.
At present, the method for the contraction coefficient of test semi-rigid sub-base material roughly has mechanical method of testing, vibratory string strain-gauge test method and foil gauge electrical measuring method three classes, and the instrument of employing is respectively clock gauge, vibratory string strainmeter and statical strain indicator.
Adopt clock gauge to carry out the determining of contraction coefficient of semi-rigid sub-base material, but test result is difficult to satisfactory, main cause is: the drawdown deformation of semi-rigid sub-base material is very little, the trickle vibrations meeting of surrounding environment produces bigger influence to test result in the test process, careless slightly, test will all that has been achieved is spoiled; Test specimen two ends and pedestal and clock gauge contact point in test process slip and peel off also and can influence test findings; The lack of homogeneity of semi-rigid sub-base material test specimen, the contact point of clock gauge are fallen on the pellet and are differed greatly with dropping on result measured between pellet; When utilizing clock gauge to carry out the drying shrinkage test, can only allow test specimen air-dry under state of nature, it is very long that test period is continued, and wayward, strengthened the error that test occurs.Utilize the temperature contraction coefficient of clock gauge mensuration material difficult more, mainly show: survey when doing the temperature coefficient of rigid base's material, the environmental cabinet that test specimen and copper, die trial iron or steel place temperature constantly to change simultaneously, metal base also can expand with heat and contract with cold when temperature variation, and its contraction coefficient is often greater than the contraction coefficient of inorganic material, so the contraction or expansion of pedestal tends to the contraction or expansion performance of tested test specimen is produced very large interference; When clock gauge places environmental cabinet, equally also be subjected to influence of temperature variation, the precision of clock gauge is 0.001mm, measures for the drawdown deformation of semi-rigid sub-base material, precision is not enough, and often can not make effective differentiation to the distortion that material is formed different semi-rigid sub-base material.
When adopting the contraction coefficient of vibratory string strain gauging semi-rigid material, it is the surface that sensor is fixed on the beam type test specimen with two steel folders, then test specimen is put into environmental cabinet together with steel folder, sensor, test specimen deforms when temperature variation or water cut change, the steel folder that drives the test specimen surface also produces relative displacement, change into frequency signal output frequency meter after the displacement between the sensor determination two steel folder, frequency meter becomes input signal corresponding strain value again and displays it.The problem of utilizing this kind instrument to exist when carrying out shrinkage test is: when utilizing this kind instrument to carry out shrinkage test, clip will be clipped on the test specimen, if the test specimen early strength is lower, just in the process of operation, cause test specimen to damage easily, make that the data of measuring are inaccurate; Sensor is in environmental cabinet, and the temperature variation in the case can impact the measuring accuracy of sensor; If test specimen is not aimed at, par on same axis, will produce the influence of twisting stress, and these influences can not reflect on the panel of gathering-device directly yet, and the error that this factor causes is not easy to get rid of.
Statical strain indicator is measured the semi-rigid material contraction coefficient, and the problem of existence is: the part test specimen breaks away from from the test specimen surface too quickly because foil gauge is soaked by test specimen moisture, causes test unstable easily; Road surface base layer material is inhomogeneous, and the test specimen surface irregularity of made, not fine and close, inhomogeneous, foil gauge are affixed on test specimen local surfaces place, is affixed on gathering materials and is affixed on the binding material between gathering materials, and its measurement result differs bigger.When utilizing this instrument to measure, the test figure discreteness that records is big.
More than several testing tools, when carrying out the test of semi-rigid material drying shrinkage, be that several test specimens that match ratio is identical are as one group, one is used for weighing in official hour, and remaining sensor installation also thinks that match ratio is identical, dosage of binder the is identical full water water cut and the emission rate of water cut are identical.Even the full water water cut that match ratio is identical, dosage of binder is identical and the emission rate of water cut are inequality, this is a key factor that produces deviation but in fact.
For the contraction coefficient to semi-rigid sub-base material is furtherd investigate, the defective that exists in view of in the past test unit, designing a kind of test instrument for shrinking and deforming of road surface material that can accurately measure the material contracts coefficient, is the urgent technical matterss that solve of current highway layout department's needs.
Summary of the invention
Technical matters to be solved by this invention is to overcome the shortcoming of above-mentioned proving installation, and a kind of reasonable in design, simple in structure, easy to use, test instrument for shrinking and deforming of road surface material that the data of surveying are accurate, automaticity is high is provided.
Solving the problems of the technologies described above the technical scheme that is adopted is: environmental cabinet is set on support, in the interlayer casing of environmental cabinet, heat-insulation layer is set, the compressor that is installed on the vibroshock is being set on the support, the industrial control computer that is connected with printer by cable and A/D converter, with be provided with 1 bearing sensor that is connected with A/D converter by lead at least on the crossbeam that support connects, be provided with the condenser pipe that links by conduit and compressor in the interlayer of environmental cabinet or in the environmental cabinet, in environmental cabinet, be provided with the temperature sensor that is connected with A/D converter by lead, by lead and joining heating tube of industrial control computer and fan, at least be provided with the sample stent that 1 lower end is arranged on the test specimen placed on the bearing sensor, at least be provided with 1 and the corresponding displacement sensor bracket of sample stent on the upper surface outside environmental cabinet, be with sleeve pipe outward and be arranged on the displacement sensor bracket by the displacement transducer that lead is connected with A/D converter, the lower end of displacement transducer is provided with the conductive bar that outer cover is equipped with sleeve pipe, in the test specimen upper surface backing plate is set.
Conductive bar of the present invention is ceramic conductive bar.
Sleeve pipe of the present invention is the bakelite sleeve.
Sleeve pipe of the present invention is a metal sleeve.
Backing plate of the present invention is the sheet glass backing plate.
The model of displacement transducer of the present invention is WYD, and the model of bearing sensor is ZCL-A.
The present invention has adopted environmental cabinet and industrial control computer, by industrial control computer the temperature in the environmental cabinet is controlled, the simulation atmospheric temperature is at the intraday changing condition and the changing condition in four seasons in a year, can place a plurality of test specimens in the environmental cabinet, can measure the distortion situation of a plurality of test specimens when change of soil water content, temperature variation simultaneously, reduce the influence of external environment, shortened the drying shrinkage test period.Data are gathered in real time, carry out data processing by industrial control computer, and printer prints goes out result of calculation, have improved the precision and the accuracy of test data, and resolution and material strain differ at one more than the order of magnitude.That the present invention has is reasonable in design, simple in structure, easy to use, the data of surveying accurately, the automaticity advantages of higher, can be used for testing the contraction coefficient of ground surface material, thereby accurately analyze cracking resistance, the deformation characteristic of ground surface material.
Description of drawings.
Fig. 1 is the front view of one embodiment of the invention.
Fig. 2 is the left view of Fig. 1.
Embodiment
The present invention is described in more detail below in conjunction with drawings and Examples, but the invention is not restricted to these embodiment.
In Fig. 1,2, the test instrument for shrinking and deforming of road surface material of present embodiment is made of environmental cabinet 1, sleeve pipe 2, temperature sensor 3, conductive bar 4, bakelite pad 5, displacement sensor bracket 6, sleeve pipe 7, displacement transducer 8, heat-insulation layer 9, condenser pipe 10, backing plate 11, sample stent 12, support 13, compressor tube 14, printer 15, industrial control computer 16, A/D converter 17, compressor 18, beam 19, crossbeam 20, bearing sensor 21, heating tube 22, test specimen 23, fan 24 connections.
On support 13, be installed with environmental cabinet 1, printer 15, industrial control computer 16, A/D converter 17, beam 19 with the screw threads for fastening connector, compressor 18 is installed on the beam 19, beam 19 is the embodiment of vibroshock, the beam 19 of present embodiment adopts Rubber shock-absorbing pad, also can adopt spring shock absorption, also can adopt hydraulic pressure or pneumatic buffer damping, the vibrations that beam 19 is produced when being used to get rid of compressor 18 runnings are to the influence of test result, and industrial control computer 16 is connected with printer 15 with A/D converter 17 by cable.Environmental cabinet is equipped with crossbeam 20 1 time on support 13, on crossbeam 20, be installed with 6 bearing sensor 21 with the screw threads for fastening connector, bearing sensor 21 is connected with A/D converter 17 by lead, the model of present embodiment bearing sensor 21 is ZCL-A, the bearing sensor 21 of this model improves measuring accuracy of the present invention greatly.
The environmental cabinet 1 of present embodiment is the interlayer casing, the outside is equipped with heat-insulation layer 9 in the interlayer casing, installed inside has condenser pipe 10, condenser pipe 10 links by compressor tube 14 and compressor 18, condenser pipe 10 is for providing cryogenic conditions in the environmental cabinet 1, at environmental cabinet 1 internal upper part temperature sensor 3 is installed, temperature sensor 3 is connected with A/D converter 17 by lead, the bottom is equipped with heating tube 22 in environmental cabinet 1, heating tube 22 links by lead and industrial control computer 16, heating tube 22 is for providing hot environment in the environmental cabinet 1, temperature sensor 3 converts the temperature signal that receives to electric signal and outputs to A/D converter 17, A/D converter 17 becomes digital signal to output to industrial control computer 16 electrical signal conversion of input, by power connection or the disconnection of industrial control computer 16 according to the programmed control compressor of setting 18, the power connection or the disconnection of control heating tube 22.Temperature control precision in the environmental cabinet 1 be in ± 0.5 ℃ of scope, and the temperature in the environmental cabinet 1 can be controlled in-30 ℃～65 ℃ the scope, simulates the low temperature or the hot environment in season in summer in season in winter.Left side at environmental cabinet 1 is installed with fan 24 with the screw threads for fastening connector, fan 24 is connected with industrial control computer 16 by lead, by 24 runnings of industrial control computer 16 control fans, air during fan 24 runnings in the casing 1 flows fast, makes the temperature in the environmental cabinet 1 become constant temperature very soon.Bottom in environmental cabinet 1 is equipped with 6 sample stents 12, and sample stent 12 lower ends pass outside the bottom surface of environmental cabinet 1, is placed on the bearing sensor 21, and sample stent 12 is used to place monitored test specimen 23, and each sample stent 12 can be placed 1 test specimen 23.Bearing sensor 21 is used to receive the drawdown deformation that test specimen 23 change of soil water content are produced, and convert the drawdown deformation of test specimen 23 to electric signal and output to A/D converter 17, A/D converter 17 becomes digital signal to output to industrial control computer 16 electrical signal conversion of input.Be equipped with on the upper surface outside environmental cabinet 1 and place 1 displacement transducer 8 on 6 displacement sensor brackets 6, each displacement sensor bracket 6, displacement transducer 8 is connected with A/D converter 17 by lead, the model of present embodiment displacement transducer 8 is WYD, the displacement transducer 8 of this model and bearing sensor 21, the displacement measurement precision reaches 3/10000ths, resolution reaches 0.1 micron, makes the present invention test the precision that test specimen 23 is out of shape under external force and improves greatly.The displacement signal of displacement transducer 8 received test specimens 23 converts electric signal to and outputs to A/D converter 17; A/D converter 17 becomes digital signal to output to industrial control computer 16 electrical signal conversion of input; the displacement transducer 8 outer sleeve pipes 7 that are with; sleeve pipe 7 is a metal sleeve; sleeve pipe 7 is used for safeguard bit displacement sensor 8; prevent displacement transducer 8 move left and right; the lower end of displacement transducer 8 is equipped with conductive bar 4; between the lower end of displacement transducer 8 and conductive bar 4, bakelite pad 5 is installed also; the conductive bar 4 of present embodiment adopts ceramic conductive bar; the contraction coefficient of this conductive bar 4 is minimum; conductive bar 4 is used to conduct the displacement of test specimen 23; conductive bar 4 is arranged on outside the environmental cabinet 1, has avoided environmental cabinet 1 environment temperature; the variation of humidity is to the influence of displacement transducer 8.Outer cover in conductive bar 4 is equipped with ebonite bush 2, and ebonite bush 2 is used to prevent conductive bar 4 move left and right.During test, place backing plate 11 in test specimen 23 upper surfaces, the backing plate 11 of present embodiment is the sheet glass backing plate, and it is even that backing plate 11 makes displacement transducer 8 experience the distortion of test specimen 23.Adopting the present invention to carry out contract test and drying shrinkage of temperature to the semi-rigid sub-base material of road tests, carry out the temperature test of contracting and to measure test specimen 23 causes test specimen 23 because of the temperature variation in the environmental cabinet 1 distortion, a certain higher temperature will be elevated to when carrying out the drying shrinkage test in the environmental cabinet 1, quicken test specimen 23 dehydrations, test the distortion that same test specimen 23 causes because of change of soil water content, reduced the influence of extraneous factor, avoided existing testing tool in drying shrinkage when test change of soil water content of carrying out test specimen and strain in the drawback of same test specimen test generation than mistake.
In the present embodiment, on crossbeam 20, be installed with 1 bearing sensor 21 with the screw threads for fastening connector, bearing sensor 21 is connected with A/D converter 17 by lead, bottom in environmental cabinet 1 is equipped with 1 sample stent 12, can place 1 test specimen 23 on the sample stent 12, sample stent 12 lower ends are placed on the bearing sensor 21,1 displacement sensor bracket 6 is installed on the upper surface outside environmental cabinet 1, place 1 displacement transducer 8 on the displacement sensor bracket 6, displacement transducer 8 is connected with A/D converter 17 by lead.The connecting relation of other parts and parts is identical with embodiment 1.
In the present embodiment, on crossbeam 20, be installed with 4 bearing sensor 21 with the screw threads for fastening connector, each bearing sensor 21 is connected with A/D converter 17 by lead, bottom in environmental cabinet 1 is equipped with 4 sample stents 12, can place 1 test specimen 23 on each sample stent 12, sample stent 12 lower ends are placed on the bearing sensor 21, be equipped with on the upper surface outside environmental cabinet 1 and place 1 displacement transducer 8 on 4 displacement sensor brackets 6, each displacement sensor bracket 6, displacement transducer 8 is connected with A/D converter 17 by lead.The connecting relation of other parts and parts is identical with embodiment 1.
In the present embodiment, condenser pipe 10 is installed in the sidewall in the environmental cabinet 1, and condenser pipe 10 links by compressor tube 14 and compressor 18.The connecting relation of other parts and parts is identical with embodiment 1.
The course of work of the present invention is as follows:
When testing the drawdown deformation of test specimen 23, test specimen 23 is put into environmental cabinet 1, test specimen 23 1 ends are connected with displacement transducer 8 by conductive bar 4, the other end is placed on the lower end and is placed with on the sample stent 12 of bearing sensor 21, industrial control computer 16 controls environment and reaches the temperature of setting in the case 1, test specimen 23 is along with temperature and change of soil water content own in the environmental cabinet 1 produce drawdown deformation, displacement transducer 8 and bearing sensor 21 convert the displacement of received test specimen 23 and deformation signal to electric signal and output to A/D converter 17, A/D converter 17 becomes digital signal to output to industrial control computer 16 electrical signal conversion of input, the digital signal of 16 pairs of inputs of industrial control computer is carried out data processing by the program of setting, calculate test specimen 23 and be subjected to temperature, the result of humidity drawdown deformation also outputs to printer 15, and printer 15 prints result of calculation.Be subjected to the result of temperature, humidity drawdown deformation by test specimen 23, can analyze cracking resistance, the deformation characteristic of tested semi-rigid sub-base material, in conjunction with the compression strength characteristic of tested semi-rigid sub-base material, for ground surface material, structure Design provide reliable basis.
Claims (6)
1, a kind of test instrument for shrinking and deforming of road surface material, it is characterized in that: environmental cabinet (1) is set on support (13), heat-insulation layer (9) is set in the interlayer casing of environmental cabinet (1), at support (13) compressor (18) that is installed on the vibroshock is set upward, the industrial control computer (16) that is connected with printer (15) by cable and A/D converter (17), with be provided with 1 bearing sensor (21) that is connected with A/D converter (17) by lead at least on the crossbeam (20) that support (13) connects, be provided with the condenser pipe (10) that links by conduit and compressor (18) in the interlayer of environmental cabinet (1) or in the environmental cabinet (1), in environmental cabinet (1), be provided with the temperature sensor (3) that is connected with A/D converter (17) by lead, by lead and joining heating tube of industrial control computer (16) (22) and fan (24), at least be provided with the sample stent (12) that 1 lower end is arranged on the test specimen placed (23) on the bearing sensor (21), at least be provided with 1 and the corresponding displacement sensor bracket of sample stent (12) (6) on the upper surface outside environmental cabinet (1), be with sleeve pipe (7) outward and be arranged on the displacement sensor bracket (6) by the displacement transducer (8) that lead is connected with A/D converter (17), the lower end of displacement transducer (8) is provided with the conductive bar that outer cover is equipped with sleeve pipe (2), in test specimen (23) upper surface backing plate (11) is set.
2, according to the described test instrument for shrinking and deforming of road surface material of claim 1, it is characterized in that: said conductive bar (4) is ceramic conductive bar.
3, according to the described test instrument for shrinking and deforming of road surface material of claim 1, it is characterized in that: said sleeve pipe (2) is the bakelite sleeve.
4, according to the described test instrument for shrinking and deforming of road surface material of claim 1, it is characterized in that: said sleeve pipe (7) is a metal sleeve.
5, according to the described test instrument for shrinking and deforming of road surface material of claim 1, it is characterized in that: said backing plate (11) is the sheet glass backing plate.
6, according to the described test instrument for shrinking and deforming of road surface material of claim 1, it is characterized in that: the model of said displacement transducer (8) is WYD, and the model of bearing sensor (21) is ZCL-A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100227247A CN100547401C (en) | 2005-12-26 | 2005-12-26 | Test instrument for shrinking and deforming of road surface material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100227247A CN100547401C (en) | 2005-12-26 | 2005-12-26 | Test instrument for shrinking and deforming of road surface material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1793918A CN1793918A (en) | 2006-06-28 |
| CN100547401C true CN100547401C (en) | 2009-10-07 |
Family
ID=36805485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100227247A Expired - Fee Related CN100547401C (en) | 2005-12-26 | 2005-12-26 | Test instrument for shrinking and deforming of road surface material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100547401C (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101183100B (en) * | 2007-12-19 | 2011-07-13 | 吉林省交通科学研究所 | Paving material temperature constringency tester |
| CN102621293A (en) * | 2012-03-29 | 2012-08-01 | 吉林省交通科学研究所 | Test instrument for shrinkage deformation of pavement semi-rigid material |
| CN104297287B (en) * | 2014-06-16 | 2017-01-25 | 怡维怡橡胶研究院有限公司 | Compression heat generation detector and method thereof |
| CN105445419A (en) * | 2015-01-21 | 2016-03-30 | 长沙理工大学 | Accelerated drying shrinkage testing method of semi-rigid base material of inorganic binding material |
| CN105445318A (en) * | 2015-01-21 | 2016-03-30 | 长沙理工大学 | Temperature expansion testing method of semi-rigid base material of inorganic binding material |
| CN105223345A (en) * | 2015-10-16 | 2016-01-06 | 中铁第五勘察设计院集团有限公司 | Mix cement stabilized graded macabam drying shrinkage detector |
| CN105674906A (en) * | 2016-01-26 | 2016-06-15 | 同济大学 | Shrinkage deformation tester for road material at full age and using method of tester |
| CN105486577B (en) * | 2016-02-16 | 2018-06-15 | 南京南瑞集团公司 | The multigroup sample compression creep test device of synchronism detection under a kind of control temperature and humidity condition |
| CN108519220B (en) * | 2018-02-28 | 2020-03-24 | 西安空间无线电技术研究所 | Antenna rib high accuracy thermal stability testing arrangement |
| CN109187624A (en) * | 2018-09-25 | 2019-01-11 | 哈尔滨工业大学 | A kind of backward measuring method of ground surface material temperature contracting coefficient |
| CN109459163B (en) * | 2018-12-18 | 2023-09-29 | 中交第二航务工程勘察设计院有限公司 | Temperature stress monitoring device for pavement structural layer |
| CN109738478A (en) * | 2019-01-18 | 2019-05-10 | 绍兴文理学院元培学院 | A kind of high-precision body frost heaving process automation monitoring system |
| CN112903020A (en) * | 2021-01-29 | 2021-06-04 | 曹广旗 | Monitoring system and monitoring process for safe intelligent power grid |
-
2005
- 2005-12-26 CN CNB2005100227247A patent/CN100547401C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1793918A (en) | 2006-06-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100547401C (en) | Test instrument for shrinking and deforming of road surface material | |
| CN106500900B (en) | A kind of Cable force measuring device and its measurement method | |
| CN103048102B (en) | A kind of state evaluating method of beam bridge | |
| CN102297811B (en) | Method for detecting inter-laminar shear stress and strain of asphalt road | |
| CN203785700U (en) | Oversized concrete floor construction period temperature and contraction monitoring device | |
| CN201149588Y (en) | Apparatus for simulating environment and test performance of pavement concrete | |
| CN110231111A (en) | A kind of contactless stress method of real-time of buried pipeline | |
| CN104990654A (en) | Remote online large-diameter heat supply pipeline strain monitoring device and remote online large-diameter heat supply pipeline strain detection method | |
| CN1987458A (en) | Method for detecting anti-cracking performance of airport cement concrete road surface | |
| CN109356009A (en) | A kind of roadbed internal dynamic modulus of resilience real-time monitoring device and its installation method | |
| CN105067452B (en) | A kind of method for obtaining asphalt material physical hardening Performance Evaluating Indexes | |
| CN107882011A (en) | A kind of miniature probe with temperature compensation function | |
| CN110442993B (en) | Method for analyzing influence of interlayer thermal resistance on stress of asphalt pavement structure | |
| Zhalehjoo et al. | The effect of instrumentation on the determination of the resilient modulus of unbound granular materials using advanced repeated load triaxial testing | |
| CN104749047A (en) | Bent member mechanical property testing device and application method thereof | |
| CN109115633B (en) | Device and method for testing mechanical friction resistance between asphalt surface layers | |
| CN203519527U (en) | Temperature field and heat conductivity coefficient tester applicable to multilayer pavement structure | |
| CN202991008U (en) | Dynamometric device for simulating mechanical characteristic of bottom-hole assembly | |
| CN201163259Y (en) | Multifunctional roadbed pavement strength tester | |
| CN202214716U (en) | Panel load tester | |
| CN204575459U (en) | A kind of flexural member Mechanics Performance Testing device | |
| CN103792149B (en) | Based on the asphalt pavement material lateral stability sensor of fiber grating | |
| CN204286351U (en) | A kind of fracture width automated watch-keeping facility | |
| CN115389341A (en) | Method for detecting flexural strength of cement concrete pavement | |
| CN102095682A (en) | Method for testing shearing strength of road structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091007 Termination date: 20111226 |