CN113295533A - Test device and method for simulating buckling failure of lining pipe - Google Patents
Test device and method for simulating buckling failure of lining pipe Download PDFInfo
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- CN113295533A CN113295533A CN202110441600.1A CN202110441600A CN113295533A CN 113295533 A CN113295533 A CN 113295533A CN 202110441600 A CN202110441600 A CN 202110441600A CN 113295533 A CN113295533 A CN 113295533A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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Abstract
The invention provides a test device and a test method for simulating buckling failure of a lining pipe. The test device comprises a pressure pump, a fixing sleeve and an industrial camera, wherein two ends of the fixing sleeve are respectively provided with a connecting flange, a lining pipe to be tested is positioned in the fixing sleeve and is clamped and fixed by the two connecting flanges, a pressurized water bag is arranged between the fixing sleeve and the outer wall of the pipe and is connected with the pressure pump, the inner wall of the lining pipe is provided with a plurality of strain gauges and a plurality of mark blocks, the strain gauges are used for sensing the stress of the lining pipe, and the industrial camera is used for recording the displacement of the mark blocks so as to calculate the strain size of the lining pipe. The test device and the method can be used for performing the buckling failure test on the lining pipes with different sizes, have strong universality, are independent from each other, are easy to disassemble and assemble, have low maintenance cost and are convenient to transport.
Description
Technical Field
The invention relates to the technical field of yield deformation testing devices, in particular to a testing device and method for simulating buckling failure of a lining pipe.
Background
The urban underground pipe network is an indispensable part in an urban infrastructure integrated system and plays an extremely important role as a lifeline in guaranteeing normal running of urban functions. When the pipeline is damaged, deformed and unevenly settled and needs to be repaired, the blind excavation repair may damage other underground pipelines or surrounding buildings. The principle of repairing the underground pipeline by the trenchless repairing technology is that the lining is installed inside the existing damaged pipeline to be repaired, so that the lining pipe and the existing pipeline form a composite pipeline structure, the internal and external loads of the pipeline are jointly borne after the repairing, and the service life of the pipeline is effectively prolonged. When the lining is adopted for semi-structural repair of the pipeline, the lining pipe is usually made of flexible materials for convenient transportation and installation. The flexible lining pipe is easy to have buckling failure under the action of internal and external loads, and in order to ensure the stability of the repaired composite pipeline, the relation between the uniform load and the buckling deformation of the flexible lining pipe in the buckling failure process needs to be researched.
At present, a test device for uniformly distributing external loads on an inner lining pipe mostly applies loads to the inner lining pipe in a direct water injection pressurization mode, and the test device has the defects of poor universality, difficulty in mounting and dismounting the inner lining pipe, difficulty in ensuring the sealing property of the test device, unreasonable design of the test device and the like.
Disclosure of Invention
In order to reduce the operation difficulty of the test device for the buckling failure of the lining pipe and improve the operability and the accuracy of the test, the invention provides the test device for simulating the buckling failure of the lining pipe, which comprises a pressure pump, a fixed sleeve and an industrial camera, two ends of the fixed sleeve are respectively connected with a connecting flange, the lining pipe to be tested is positioned in the fixed sleeve, and the two ends of the lining pipe are clamped and fixed by two connecting flanges, a pressurized water bag is arranged between the inner wall of the fixed sleeve and the outer wall of the lining pipe, the pressurized water bag is connected with the pressurizing pump through a high-pressure water pipe, the lining pipe is coaxially arranged with the fixed sleeve, the inner wall of the lining pipe is provided with a plurality of strain gauges and a plurality of marking blocks, the strain gauges are used for sensing the load borne by the lining pipe, the industrial camera is used for recording the position change of the mark block so as to calculate the deformation of the lining pipe.
Furthermore, a water injection hole and a water drainage hole are formed in the fixing sleeve, a water injection port and a water drainage port are formed in the pressurized water bag, and the water injection port and the water drainage port respectively penetrate through the water injection hole and the water drainage hole and extend out of the fixing sleeve.
Furthermore, a plurality of limit stops are arranged on the inner wall of the fixed sleeve and used for keeping the lining pipe in a coaxial state.
Furthermore, two fixing rings are respectively arranged at two ends of the inner wall of the fixing sleeve, the two fixing rings are locked on the inner wall of the fixing sleeve through locking bolts, and the two fixing rings respectively fix two ends of the pressurized water bag on the inner wall of the fixing sleeve.
The industrial camera is electrically connected with the display terminal, and the display terminal is used for displaying the stress of the lining pipe in real time in the deformation.
Furthermore, one of the two connecting flanges is provided with an avoiding hole.
Furthermore, the inner walls of the water filling port and the water outlet of the pressurized water bag are provided with connecting threads, and the end part of the high-pressure water pipe is connected to the water filling port in a threaded connection mode
The invention also provides a test method of the test device for simulating the buckling failure of the lining pipe, which comprises the following steps:
s1: filling water under normal pressure into the pressurized water bag and discharging air in the pressurized water bag;
s2: connecting the high-pressure water pipe to the water filling port of the pressurized water bag, and starting the pressurizing pump to slowly and uniformly fill high-pressure water into the pressurized water bag.
S3: the data acquisition collector and the industrial camera are started while pressurization is started, the display terminal is opened, and the display terminal displays and records the stress and strain of the lining pipe in the water injection process of the pressurization pump in real time.
S4: and (4) closing the pressure pump when the pressure pump is pressurized to a preset test limit load or the buckling failure damage of the lining pipe occurs, and completing the test.
Compared with other test devices for simulating buckling failure of the lining pipe, the invention has the following advantages:
(1) this test device adopts the mode simulation equipartition load of water bag high pressure water injection, compares in traditional direct water injection back to flange apron and the sealed mode of gluing of steel sleeve seam crossing use stagnant water, and this test device has promoted the leakproofness to omit the sealed processing to the junction of flange apron and steel sleeve when preparing the experiment.
(2) The test device simulates high-pressure water with uniformly distributed loads to be not in direct contact with test equipment, reduces corrosion damage generated after steel parts in the test equipment are in contact with water, prolongs the service life of the test equipment, and reduces the difficulty and cost of maintenance.
(3) Compared with other test devices for simulating buckling failure of the lining pipe, the test device can independently install and detach all parts in the test device under the condition of ensuring the sealing property of the test device, and is convenient for transportation and replacement of damaged parts.
(4) This test device passes through the fixed interior bushing pipe of limit stop in the steel sleeve, compares in with interior bushing pipe snap-on both ends flange apron, can avoid the fixed restraint in interior bushing pipe both ends to the influence of bucking deformation to enlarge experimental interior bushing pipe length design range, simultaneously, through changing the interior bushing pipe of limit stop with the installation different diameters, improved the commonality of test device to the bushing pipe size.
(5) The industrial camera can measure the displacement of each marker block of the selected section of the lining pipe in the loading process, and can obtain the relation between the time in the loading process and the deformation displacement of the selected section of the lining pipe according to the displacement data to display the dynamic process of the lining pipe from an initial state to buckling failure.
Drawings
Fig. 1 is an overall configuration diagram of a test apparatus for simulating buckling failure of a liner pipe according to an embodiment of the present invention.
Fig. 2 is an installation structure diagram of a connection flange 6 in a test device for simulating buckling failure of a lining pipe according to an embodiment of the present invention.
Fig. 3 is an installation structure diagram of a limit stopper 21 in a test apparatus for simulating buckling failure of a liner pipe according to an embodiment of the present invention.
Fig. 4 is an installation structure diagram of the fixing ring 5 in the test device for simulating buckling failure of the lining pipe according to the embodiment of the invention.
In the figure: 1-a pressure pump, 2-a fixed sleeve, 21-a limit stop, 3-an inner lining pipe, 4-pressurized water, 41-a water filling port, 42-a water discharging port, 5-a fixed ring, 6-a connecting flange, 61-a position avoiding hole, 7-a connecting bolt, 71-a locking bolt, 8-a strain gauge, 81-a first connecting wire, 9-a data collector, 91-a second connecting wire, 10-a marking block, 11-a tripod, 12-an industrial camera, 121-a third connecting wire, 13-a display terminal and 14-a high-pressure water pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 and 2, a test device for simulating buckling failure of a lining pipe comprises a pressure pump 1, a fixing sleeve 2, a data collector 9, an industrial camera 12 and a display terminal 13.
The fixing sleeve 2 is a hollow round pipe body made of rigid materials, in the implementation, the fixing sleeve 2 is made of steel materials, two ends of the fixing sleeve 2 are respectively connected with a connecting flange 6, the two connecting flanges 6 are respectively fixed at two ends of the fixing sleeve 2 in a detachable mode through a plurality of connecting bolts 7, a position avoiding hole 61 is formed in the middle of one connecting flange 6, the lining pipe 3 to be tested is located in the fixing sleeve 2 and is coaxially arranged with the fixing sleeve 2, the diameter of the lining pipe 3 is smaller than that of the fixing sleeve 2, and when the lining pipe 3 is tested, the lining pipe 3 is clamped in the fixing sleeve 2 from two ends by the two connecting flanges 6.
A cylindrical gap is formed between the inner wall of the fixing sleeve 2 and the outer wall of the lining pipe 3, a cylindrical pressurized water bag 4 is arranged in the cylindrical gap, two ends of the pressurized water bag 4 are conveyed to the inner wall of the fixing sleeve 2, a water injection hole and a water drainage hole are further formed in the middle of the fixing sleeve 2, a water injection port 41 and a water drainage port 42 are formed in the pressurized water bag 4, the water injection port 41 and the water drainage port 42 respectively penetrate through the water injection hole and the water drainage hole to be exposed out of the fixing sleeve 2, a high-pressure water pipe 14 is arranged on the pressure pump 1, the high-pressure water pipe 14 is connected to the water injection port 41, a water tank is arranged on the pressure pump 1, the pressure pump 1 is used for pressurizing water in the water tank and then inputting the water into the pressurized water bag 4 through the high-pressure water pipe 14, and therefore uniform loads are uniformly applied to the outer wall of the lining pipe 3 through high-pressure water in the pressurized water bag 4.
The inner wall of the lining pipe 3 is provided with a plurality of strain gauges 8 and a plurality of mark blocks 10, wherein each strain gauge is electrically connected to the data collector 9 through a first connecting line 81, the data collector 9 is electrically connected to the display terminal 13 through a second connecting line 91, the strain gauge 8 is used for sensing the load applied to the lining pipe 3, the industrial camera 12 is fixed through a tripod 11 and is opposite to all the mark blocks 10, the industrial camera 12 is used for shooting the position of the mark block 10 in real time through a position avoiding hole 61 on the connecting flange 6 and calculating the deformation of the lining pipe 3 in the test process according to the displacement of the mark block 10, the industrial camera 12 is electrically connected to the display terminal through a third wire 121, and the display terminal 13 is used for dynamically displaying the stress and the deformation of the lining pipe 3 in the test process, and recording the stress and deformation data of the lining pipe 3 in the whole experimental process.
Furthermore, a plurality of limit stops 21 are fixed on the inner wall of the fixed sleeve 2, all the limit stops 21 surround and limit the inner lining tube 3 together, and the limit stops 21 are used for ensuring that the inner lining tube 3 and the fixed sleeve 2 are in a coaxial state, so that the load applied to the outer wall of the inner lining tube 3 by the pressurized water bag 4 is kept uniform, and the limit stops 21 of different specifications can be selected corresponding to the inner lining tubes 3 of different sizes.
Furthermore, two fixing rings 5 are respectively arranged at two ends of the inner wall of the fixing sleeve 3, the two fixing rings 5 are locked on the inner wall of the fixing sleeve 1 through locking bolts 71, and the two fixing rings 5 respectively fix two ends of the pressurized water bag on the inner wall of the fixing sleeve 2.
Furthermore, the inner walls of the water injection port 41 and the water discharge port 42 of the pressurized water bag are provided with connecting threads, the end of the high-pressure water pipe 14 is provided with connecting threads matched with the connecting threads on the water injection port 41, so that the high-pressure water pipe 14 is conveniently in sealed connection with the water injection port 41, the water discharge port 42 of the pressurized water bag 4 is also provided with a plugging cover, and the plugging cover is used for sealing the water discharge port 32 in the test process of the liner pipe and discharging water in the pressurized water bag 4 after the test is completed.
The test method of the test device for simulating the buckling failure of the lining pipe, disclosed by the invention, specifically comprises the following steps of:
s1: covering the blocking cover on the water outlet 42 of the pressurized water bag to seal the water outlet 42; filling water under normal pressure into the pressurized water bag 4 through a water filling port 41 of the pressurized water bag 4 to empty the air in the pressurized water bag 4;
s2: the high-pressure water pipe 14 is connected to the water filling port 41, and the pressurizing pump 1 is started to slowly and uniformly fill the pressurized water bag 4 with water.
S3: the data collector 9 and the industrial camera 12 are started at the same time when the pressure pump 1 is started, and the display terminal 13 displays and records the stress and strain of the lining pipe 3 in real time.
S4: and when the pressurization of the pressurization pump 1 reaches the preset limit test load or the buckling failure of the lining pipe 3 occurs, the pressurization pump 1 stops working, and the test is completed.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The utility model provides a test device that bushing pipe bucking was failed in simulation which characterized in that: the device comprises a pressure pump, a fixing sleeve and an industrial camera, wherein two ends of the fixing sleeve are respectively connected with a connecting flange, a lining pipe to be tested is positioned in the fixing sleeve, two ends of the lining pipe are clamped and fixed by the two connecting flanges, a pressurizing water bag is arranged between the inner wall of the fixing sleeve and the outer wall of the lining pipe, the pressurizing water bag is connected with the pressure pump through a high-pressure water pipe, the lining pipe and the fixing sleeve are coaxially arranged, a plurality of strain gauges and a plurality of marking blocks are attached to the inner wall of the lining pipe, the strain gauges are used for sensing the load size borne by the lining pipe, and the industrial camera is used for recording the position change of the marking blocks so as to calculate the deformation size of the lining pipe.
2. The test device for simulating buckling failure of the inner lining pipe as claimed in claim 1, wherein: the water injection hole and the water drainage hole are formed in the fixing sleeve, the water injection port and the water drainage port are formed in the pressurized water bag, and the water injection port and the water drainage port penetrate through the water injection hole and the water drainage hole respectively and extend out of the fixing sleeve.
3. The test device for simulating buckling failure of the inner lining pipe as claimed in claim 1, wherein: the inner wall of the fixed sleeve is provided with a plurality of limit stops, and the limit stops are used for keeping the lining pipe in a coaxial state.
4. The test device for simulating buckling failure of the inner lining pipe as claimed in claim 1, wherein: the two ends of the inner wall of the fixed sleeve are respectively provided with a fixed ring, the two fixed rings are locked on the inner wall of the fixed sleeve through locking bolts, and the two fixed rings respectively fix the two ends of the pressurized water bag on the inner wall of the fixed sleeve.
5. The test device for simulating buckling failure of the inner lining pipe as claimed in claim 1, wherein: the strain gauge comprises an industrial camera, and is characterized by further comprising a display terminal, wherein all strain gauges are electrically connected with a data collector, the data collector and the industrial camera are electrically connected with the display terminal, and the display terminal is used for displaying the size of the stress of the lining pipe in deformation in real time.
6. The test device for simulating buckling failure of the inner lining pipe as claimed in claim 1, wherein: one of the two connecting flanges is provided with a position avoiding hole.
7. The test device for simulating buckling failure of the inner lining pipe as claimed in claim 1, wherein: the water injection port and the inner wall of the water outlet of the pressurized water bag are both provided with connecting threads, and the end part of the high-pressure water pipe is connected to the water injection port in a threaded connection mode.
8. The test device for simulating buckling failure of the inner lining pipe as claimed in claim 7, wherein: the water outlet of the pressurized water bag is also provided with a plugging cover.
9. A test method based on the test device for simulating buckling failure of the lining pipe according to the claims 1 to 8, characterized in that: the method comprises the following steps:
s1: filling water under normal pressure into the pressurized water bag and discharging air in the pressurized water bag;
s2: connecting a high-pressure water pipe to a water filling port of the pressurized water bag, and starting a pressurizing pump to slowly and uniformly inject high-pressure water into the pressurized water bag;
s3: starting a data acquisition collector and an industrial camera while starting pressurization, and opening a display terminal, wherein the display terminal displays and records the stress and strain of the lining pipe in the water injection process of the pressurization pump in real time;
s4: and (4) closing the pressure pump when the pressure pump is pressurized to a preset test limit load or the buckling failure damage of the lining pipe occurs, and completing the test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110441600.1A CN113295533A (en) | 2021-04-23 | 2021-04-23 | Test device and method for simulating buckling failure of lining pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110441600.1A CN113295533A (en) | 2021-04-23 | 2021-04-23 | Test device and method for simulating buckling failure of lining pipe |
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| CN113295533A true CN113295533A (en) | 2021-08-24 |
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| CN202110441600.1A Pending CN113295533A (en) | 2021-04-23 | 2021-04-23 | Test device and method for simulating buckling failure of lining pipe |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114295486A (en) * | 2021-12-22 | 2022-04-08 | 中国长江三峡集团有限公司 | Flexible liner external pressure buckling test device and method |
| CN114323969A (en) * | 2021-11-22 | 2022-04-12 | 中国地质大学（武汉） | External pressure bearing performance testing method for liner repair structure of rigid pipeline |
| CN116148033A (en) * | 2022-11-10 | 2023-05-23 | 中国原子能科学研究院 | Test device and test method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101443645A (en) * | 2006-05-16 | 2009-05-27 | 可恩索联合有限公司 | Method and apparatus for checking tubular articles |
| CN108318343A (en) * | 2017-12-13 | 2018-07-24 | 中国石油天然气集团公司 | A kind of experimental rig and method of test tubing critical external compressive resistance disruption properties |
| CN108982230A (en) * | 2018-08-13 | 2018-12-11 | 英立（江苏）机电有限公司 | A kind of PE pipe external pressure test device |
-
2021
- 2021-04-23 CN CN202110441600.1A patent/CN113295533A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101443645A (en) * | 2006-05-16 | 2009-05-27 | 可恩索联合有限公司 | Method and apparatus for checking tubular articles |
| CN108318343A (en) * | 2017-12-13 | 2018-07-24 | 中国石油天然气集团公司 | A kind of experimental rig and method of test tubing critical external compressive resistance disruption properties |
| CN108982230A (en) * | 2018-08-13 | 2018-12-11 | 英立（江苏）机电有限公司 | A kind of PE pipe external pressure test device |
Non-Patent Citations (1)
| Title |
|---|
| AXEL DONGES 等: "《激光测量技术 原理与应用》", 30 June 2017, 华中科技大学出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323969A (en) * | 2021-11-22 | 2022-04-12 | 中国地质大学（武汉） | External pressure bearing performance testing method for liner repair structure of rigid pipeline |
| CN114295486A (en) * | 2021-12-22 | 2022-04-08 | 中国长江三峡集团有限公司 | Flexible liner external pressure buckling test device and method |
| CN116148033A (en) * | 2022-11-10 | 2023-05-23 | 中国原子能科学研究院 | Test device and test method |
| CN116148033B (en) * | 2022-11-10 | 2024-05-14 | 中国原子能科学研究院 | Test device and test method |
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Application publication date: 20210824 |