CN104567839A - Tunnel inspection lofting device and lofting method - Google Patents
Tunnel inspection lofting device and lofting method Download PDFInfo
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- CN104567839A CN104567839A CN201510005079.1A CN201510005079A CN104567839A CN 104567839 A CN104567839 A CN 104567839A CN 201510005079 A CN201510005079 A CN 201510005079A CN 104567839 A CN104567839 A CN 104567839A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000007689 inspection Methods 0.000 title abstract description 4
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims description 48
- 238000010276 construction Methods 0.000 claims description 21
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012372 quality testing Methods 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a tunnel inspection lofting device and a lofting method. The tunnel inspection lofting device comprises a distance measurement trolley positioned at the center line of a tunnel and advancing along the center line of the tunnel; a lofting platform arranged on the distance measurement trolley; a storage tank arranged on the lofting platform and used for storing lofting liquid; a drainage pipe of which one end is connected with the storage tank by an injector and the other end is connected with a four-way pipe; a vaulted injecting pipe perpendicular to the tunnel ground and of which one end is connected with the four-way pipe and the other end extends into a tunnel vault; and a haunch injecting pipe of which one end is connected with the four-way pipe and the other end extends to the position of a tunnel haunch. The lofting method adopts the lofting device to perform once lofting operation in the tunnel at a unit distance; according to the lofting device and the lofting method, lofting marking is carried out at the positions of the tunnel vault and the tunnel haunch, while the lofting marking working efficiency is improved, the lofting marking position is accurate, so that the device and the method can provide reliable guarantee for the accuracy of the follow-up geological radar scanned tunnel lining data.
Description
Technical field
The present invention relates to Tunnel testing field, particularly a kind of Tunnel testing laying out apparatus and method.
Background technology
Tunnel construction, as disguised engineering, residing for it, geologic media is complicated and changeable, and construction process requirement is higher.In order to avoid unnecessary loss, ensure the safe reliability of Tunnel Engineering during runing, control Tunnel Engineering in construction process and hand over, the construction quality of being completed is particularly important.
At present, the construction of Tunnel Engineering mainly relies on tunnel monitoring measurement to carry out guiding construction.After constructing tunnel completes, need to evaluate constructing tunnel quality, and guide reparation to improve construction quality.Need fast, comprehensively, accurately to understand liner structure with or without indexs such as leakiness region of coming to nothing, sprayed concrete thickness, steel arch-shelf spacing in Tunnel testing process, and further guiding construction and monitoring construction quality.
As the main tool of Tunnel testing, in the advance geologic prediction that geological radar has been widely used in Tunnel Engineering and quality testing.It has the features such as resolution is high, lossless detection, profile image are directly perceived, provides technical guarantee for evaluating Inspection of Tunnel Quality fast and accurately.
As shown in Figure 1, geological radar forms primarily of radar host computer A, transmission line B and radar antenna C, and radar antenna C is connected to radar host computer A by transmission line B; Wherein, radar host computer A is the central control system of detections of radar work, transmission line B has very strong self-shileding function, transmits coherent signal at radar host computer A and radar antenna C; Radar antenna C, for launching frequency electromagnetic waves (such as 200MHz, 400MHz, 900MH etc.) and receiving different medium reflection electromagnetic wave around tunnel.
When Tunnel testing, geological radar by radar antenna C tunnel-liner surface internally transmission frequency be the electromagnetic wave of hundreds of megahertz.Just reflection and transmission can occur when electromagnetic wave runs into the interface of different medium, reflection wave returns to lining cutting surface, receive by radar antenna C and send to radar host computer A.Radar host computer A records electromagnetic wave and forms associated picture from the two way travel time being transmitted into reception, is analyzed after having detected by the quality of data post-processing software to tunnel lining structure.
Liner structure is the main body ingredient of Tunnel Engineering, the quality of its construction quality is directly connected to the integrally-built security and stability in tunnel, so must strengthen, to the detection of tunnel lining structure quality in construction and after completion, ensureing the safe reliability of Tunnel Engineering.Therefore, the detection of tunnel lining structure needs the multiple positions in tunnel to detect, and could carry out the evaluation of globality to tunnel lining structure.And then the setting detecting position seems particularly important.
At present, when Tunnel testing, need the layout of carrying out survey line, arrangement of measuring-line is arranged as master with longitudinal direction (tunnel bearing of trend), and laterally (tunnel interfaces) is arranged as auxiliary.As shown in Figure 2, the detection in tunnel at least needs layout 5 surveys line, lays respectively at the vault in tunnel, left and right haunch, left and right abutment wall, for larger three lanes tunnel, also need to increase by two surveys line at the haunch position in tunnel, running into the defective place of lining cutting also needs infill lines.In this area, vault is positioned at the top in tunnel, and in the radian relation of 45 degree between left and right haunch and vault, left and right abutment wall and left and right haunch are respectively in the radian relation of 45 degree.
Before lining quality of channel, need to carry out detection setting-out process in advance, namely in tunnel, record a mileage mark every 5 ~ 10m.When preparing to detect, radar antenna is connected with radar host computer, and ensures to be in normal operating conditions, when detection, by radar antenna and lining cutting surface closely connected, and the bearing of trend in survey line position along tunnel carries out continuous detecting.
As mentioned above, for lining quality of channel, require to record a mileage mark every 5 ~ 10m on tunnel survey line, and then in testing process, milepost note according to having marked marks in real time in radar host computer, and this detection setting-out process has important effect for detection:
1) ensure that radar image is corresponding with on-the-spot tunnel-liner position;
2) ensure that institute's detection tunnel image length is consistent with actual mileage when later stage radar data process range normalization;
3) in testing process, mark according to the position of radar image to liner structure possibility existing defects, and then record radar data in time with reference to milepost mark and detect position corresponding relation, be convenient to carry out selective analysis in late time data process.
But, due in current testing to detect setting-out process and think little of and the error problem of manual work process, frequent existence mark is fuzzy, the phenomenon of mistake, and testing staff can not mark at accurate location, and then causes between image record and real marking number and there is deviation, because this increasing the workload of late time data process, again need check and check mark number, when deviation is larger, even need to re-start detection, and then bring repeated work, make work efficiency drop.
The problem of existing Tunnel testing setting-out process is mainly:
1) the setting-out markers work of present stage mainly relies on the cooperation of unit in charge of construction, when employing 50 meters of rulers quantize mark, the precision of mark relies on the conscientious degree of operating personnel completely, and cannot accurately obtain bend length in corner, tunnel and can produce error;
2) most of unit in charge of construction's dependence site operation pile No. (mark number during construction) is counter shifts actual operation pile No. (mark number during operation) onto, and Construction stake number not marks according to the spacing of 5m, and then causes pile No. deviation;
3) due to dark in tunnel, institute makes marks and not easily sees clearly, and bid quotation mark personnel, due to reasons such as careless omission or testing staff do not hear, make radar signature no marking, wrongly to beat, and then bring impact to data accuracy;
4) because individual is different to the understanding of haunch survey line position, detection position may be made too high or too low, depart from the haunch survey line position of actual requirement, the accuracy detecting data can be affected like this.
Summary of the invention
In view of this, the invention provides a kind of Tunnel testing laying out apparatus and method, with improve setting-out labeling process efficiency and setting-out mark position accurate.
The technical scheme of the application is achieved in that
A kind of Tunnel testing laying out apparatus, comprising:
Be positioned at tunnel center line, and along the ranging vehicle that described tunnel center line is advanced;
Be installed on the sample placement platform on described ranging vehicle;
To be positioned on described sample placement platform and to store the storage tank of setting-out liquid;
One end is connected to described storage tank by thrower, and the other end is connected to the drainage tube of a four-way piece;
Perpendicular to tunnel ground, and one end is connected to described four-way piece, and the other end extends to the vault playpipe of described tunnel vault;
One end is connected to described four-way piece, and the other end extends to the haunch playpipe at haunch place, described tunnel.
Further, described haunch playpipe is two, lays respectively at the both sides of described vault playpipe.
Further, described Tunnel testing laying out apparatus also comprises:
Be installed on described vault playpipe, and light direction is perpendicular to tunnel ground laser instrument upwards.
Further, described setting-out liquid is paint.
Further, described vault playpipe, haunch playpipe, drainage tube and four-way piece are pvc pipe.
Further, described ranging vehicle has and is installed on its wheel to detect the range encoder of car body travel distance.
Further, described Tunnel testing laying out apparatus also comprise be installed between described ranging vehicle and sample placement platform with support described sample placement platform lifting crane.
A kind of Tunnel testing setting out method, adopts the Tunnel testing laying out apparatus as above described in any one, comprising:
Described ranging vehicle is docked at tunnel to be detected midline, and the other end of described vault playpipe is aimed at described tunnel vault, the other end of described haunch playpipe is aimed at described tunnel haunch;
Described ranging vehicle moves along center line direction, described tunnel, aims at described tunnel vault to make the other end of described vault playpipe all the time when mobile;
When described ranging vehicle moves along center line direction, described tunnel, record the displacement that described range finding is surveyed, and whenever described ranging vehicle Moving Unit distance, trigger described thrower and perform setting-out operation, the setting-out Liquid inject in described storage tank is sentenced to tunnel vault and haunch and marks.
Further, described unit distance is 5 meters or 10 meters.
Further, the mark position performing setting-out operation is first arranged in the whole pile No. position of tunnel portal place Construction stake number.
As can be seen from such scheme, before carrying out tunnel-liner radar scanning, adopt the setting-out mark that Tunnel testing laying out apparatus of the present invention and method are carried out at tunnel vault and haunch, while raising setting-out markers work efficiency, make setting-out mark position more accurate, for the accuracy of follow-up geological radar scanning-tunnelling data provides reliable guarantee.
Accompanying drawing explanation
Fig. 1 is the composition schematic diagram of geological radar;
Fig. 2 is tunnel cross sectional schematic diagram;
Fig. 3 is Tunnel testing laying out apparatus example structure schematic diagram provided by the invention;
Fig. 4 is Tunnel testing setting out method embodiment process flow diagram provided by the invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, to develop simultaneously embodiment referring to accompanying drawing, the present invention is described in further detail.
As shown in Figure 3, Tunnel testing laying out apparatus embodiment provided by the invention comprises ranging vehicle 1, sample placement platform 2, storage tank 31, thrower 32, drainage tube 33, four-way piece 34, vault playpipe 35 and haunch playpipe 36.Wherein, described ranging vehicle 1 is positioned at the midline position place in tunnel 8, and advances along the center line in described tunnel 8; Described sample placement platform 2 is installed on described ranging vehicle 1; Described storage tank 31 to be positioned on described sample placement platform 2 and to store setting-out liquid; One end of described drainage tube 33 is connected to described storage tank 31 by thrower 32, and the other end of described drainage tube 33 is connected to four-way piece 34; Described vault playpipe 35 is perpendicular to the ground 81 in tunnel 8, and one end of described vault playpipe 35 is connected to described four-way piece 34, and the other end of described vault playpipe 35 extends to the vault 82 in described tunnel 8; One end of described haunch playpipe 36 is connected to described four-way piece 34, and the other end of described haunch playpipe 36 extends to the haunch 83 in described tunnel 8.Wherein, described haunch playpipe 36 is two, lays respectively at the both sides of described vault playpipe 35.
Further, also comprise laser instrument 37 in Tunnel testing laying out apparatus embodiment of the present invention, described laser instrument 37 is installed on described vault playpipe 35, and light direction perpendicular to tunnel 8 ground 81 upwards.The effect of laser instrument 37 is aimed at, and is directly used in the position that vault playpipe 35 aims at the vault 82 in tunnel 8, indirectly makes haunch playpipe 36 aim at haunch 83 position in tunnel 8.Because light is comparatively dim in tunnel 8, when Tunnel testing laying out apparatus is located in tunnel 8, if there is no the auxiliary of laser instrument 37, then not easily the other end of vault playpipe 35 is aimed at the vault 82 in tunnel 8.After installation laser instrument 37, laser instrument 37 penetrate light beat the position of tunnel wall in tunnel 8 be namely the aligned position of vault playpipe 35 other end, and then assisting by laser instrument 37, more be beneficial to the aligning of vault playpipe 35 pairs of vaults 82, and while the other end of vault playpipe 35 aims at vault 82, the other end of two haunch playpipes 36 is registered to haunch 83 position in tunnel 8 respectively.In a word, the effect of laser instrument 37 is alignings of auxiliary whole Tunnel testing laying out apparatus.
In Tunnel testing laying out apparatus embodiment of the present invention, described setting-out liquid is paint.Described vault playpipe 35, haunch playpipe 36, drainage tube 33 and four-way piece 34 are PVC (Polyvinyl chloride polymer, Polyvinylchloride) pipe.
In addition, in the embodiment of the present invention, described vault playpipe 35 and haunch playpipe 36 can adopt draw-tube, and then the tunnel being convenient to install and adapt to different-diameter uses.
In the embodiment of the present invention, also include range encoder 11, be installed on ranging vehicle 1, for measuring the distance that ranging vehicle 1 travels.Range encoder 11 is installed on the wheel place of ranging vehicle 1, by measuring the distance that all numbers of vehicle wheel rotation travel to calculate ranging vehicle 1.Be connected to range encoder 11 by computer to go forward side by side line item with the distance monitoring ranging vehicle 1 and travel.
In order to for the long-pending tunnel setting-out work of different section, Tunnel testing laying out apparatus of the present invention also comprises and being installed between described ranging vehicle 1 and sample placement platform 2 to support the crane 4 of described sample placement platform 2 lifting.Particularly, described crane 4 is installed on ranging vehicle 1, and sample placement platform 2 is installed on crane 4.According to the adjustable height of different tunnel height adjustment crane 4, and then the accurate location of vault playpipe 35 and haunch playpipe 36 can be controlled.
With above-mentioned Tunnel testing laying out apparatus embodiment, invention also provides a kind of Tunnel testing setting out method, as shown in Figure 4, it comprises:
Described ranging vehicle is docked at the midline in tunnel to be detected, and the other end of described vault playpipe is aimed at described tunnel vault, the other end of described haunch playpipe is aimed at described tunnel haunch;
Described ranging vehicle moves along center line direction, described tunnel, aims at described tunnel vault to make the other end of described vault playpipe all the time when mobile;
When described ranging vehicle moves along center line direction, described tunnel, record the displacement that described range finding is surveyed, and whenever described ranging vehicle Moving Unit distance, trigger described thrower and perform setting-out operation, the setting-out Liquid inject in described storage tank is sentenced to tunnel vault and haunch and marks.
More specifically, in the above-mentioned Tunnel testing setting out method process of execution, if perform setting-out process from tunnel portal position, then ranging vehicle is first made to dock at tunnel portal position.Laser instrument is used for location, after having parked ranging vehicle, utilize the location of laser instrument, the other end of vault playpipe is made just to be positioned at the vault in tunnel, in this process, the position of ranging vehicle also may adjust along with utilizing the location of laser instrument a little, and after location is terminated, namely ranging vehicle is accurately positioned at the midline position in tunnel.Angle between described haunch playpipe and vault playpipe, according to the radius in the length of vault playpipe, tunnel and haunch to radian (45 degree) size of vault, can determine according to existing geometric knowledge.Range encoder is connected with computer.This just completes the positioning work that Tunnel testing laying out apparatus carries out before setting-out.
After positioning work terminates, ensureing while the survey line of tunnel vault can not be departed from position that the light that monitoring laser device sends projects, ranging vehicle at the uniform velocity to be travelled, and then while ranging vehicle at the uniform velocity travels, the light that laser instrument sends is positioned at tunnel vault survey line position all the time, and then the other end of another two haunch playpipes is positioned on left and right haunch two surveys line in tunnel all the time.
Utilize range encoder when vehicle of finding range at the uniform velocity travels, in computer, record the mileage that ranging vehicle travels.When ranging vehicle moves forward unit distance, by pressing trigger button, trigger sprayer is drawn setting-out liquid (such as painting) and is ejected into vault and haunch position respectively by vault playpipe and haunch playpipe from storage tank, and then completes a setting-out action.Repeat this process and just at tunnel vault and haunch, a setting-out mark can be set every unit distance.In order to the information completely of tunnel-liner radar scanning, unit distance can arrange 5 meters or 10 meters, preferentially, is set to 5 meters.Simultaneously in order to the convenience of testing process subsequently and data processing, the position that setting-out marks is arranged at the whole pile No. place of construction, namely position, pile No. end is " 0 " or " 5 " place.Further, can according to the Construction stake number of tunnel portal, determine and the distance that the whole pile No. of construction differs, again according to the mileage that ranging vehicle is walked, the mark position performing setting-out operation is first made just to be arranged in the whole pile No. position of tunnel portal place Construction stake number, like this, just all whole pile No. place can be positioned at after this done setting-out mark.In order to the pile No. of institute's marking can be checked in testing process, can according to a mark whole pile No. on the length in tunnel every 50 meters or 100 meters of abutment wall places in tunnel or road surface, and then the analysis result being convenient to tunnel-liner radar scanning is subsequently corresponding with the tunnel location of reality.
Before carrying out tunnel-liner radar scanning, adopt the setting-out mark that Tunnel testing laying out apparatus of the present invention and method are carried out at tunnel vault and haunch, while raising setting-out markers work efficiency, make setting-out mark position more accurate, for the accuracy of follow-up geological radar scanning-tunnelling data provides reliable guarantee.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. a Tunnel testing laying out apparatus, is characterized in that, comprising:
Be positioned at tunnel center line, and along the ranging vehicle that described tunnel center line is advanced;
Be installed on the sample placement platform on described ranging vehicle;
To be positioned on described sample placement platform and to store the storage tank of setting-out liquid;
One end is connected to described storage tank by thrower, and the other end is connected to the drainage tube of a four-way piece;
Perpendicular to tunnel ground, and one end is connected to described four-way piece, and the other end extends to the vault playpipe of described tunnel vault;
One end is connected to described four-way piece, and the other end extends to the haunch playpipe at haunch place, described tunnel.
2. Tunnel testing laying out apparatus according to claim 1, is characterized in that: described haunch playpipe is two, lays respectively at the both sides of described vault playpipe.
3. Tunnel testing laying out apparatus according to claim 1, is characterized in that, described Tunnel testing laying out apparatus also comprises:
Be installed on described vault playpipe, and light direction is perpendicular to tunnel ground laser instrument upwards.
4. Tunnel testing laying out apparatus according to claim 1, is characterized in that: described setting-out liquid is paint.
5. Tunnel testing laying out apparatus according to claim 1, is characterized in that: described vault playpipe, haunch playpipe, drainage tube and four-way piece are pvc pipe.
6. Tunnel testing laying out apparatus according to claim 1, is characterized in that: described ranging vehicle has and is installed on its wheel to detect the range encoder of car body travel distance.
7. Tunnel testing laying out apparatus according to claim 1, is characterized in that: described Tunnel testing laying out apparatus also comprise be installed between described ranging vehicle and sample placement platform with support described sample placement platform lifting crane.
8. a Tunnel testing setting out method, adopts the Tunnel testing laying out apparatus described in any one of claim 1 to 7, it is characterized in that, comprising:
Described ranging vehicle is docked at tunnel to be detected midline, and the other end of described vault playpipe is aimed at described tunnel vault, the other end of described haunch playpipe is aimed at described tunnel haunch;
Described ranging vehicle moves along center line direction, described tunnel, aims at described tunnel vault to make the other end of described vault playpipe all the time when mobile;
When described ranging vehicle moves along center line direction, described tunnel, record the displacement that described range finding is surveyed, and whenever described ranging vehicle Moving Unit distance, trigger described thrower and perform setting-out operation, the setting-out Liquid inject in described storage tank is sentenced to tunnel vault and haunch and marks.
9. Tunnel testing setting out method according to claim 8, is characterized in that: described unit distance is 5 meters or 10 meters.
10. Tunnel testing setting out method according to claim 8, is characterized in that, the mark position performing setting-out operation is first arranged in the whole pile No. position of tunnel portal place Construction stake number.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510005079.1A CN104567839B (en) | 2015-01-06 | 2015-01-06 | A kind of Tunnel testing laying out apparatus and method |
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| CN201510005079.1A CN104567839B (en) | 2015-01-06 | 2015-01-06 | A kind of Tunnel testing laying out apparatus and method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105083305A (en) * | 2015-09-16 | 2015-11-25 | 中国铁道科学研究院 | Tunnel state detection vehicle |
| CN105302143A (en) * | 2015-11-24 | 2016-02-03 | 中国铁道科学研究院 | Tunnel lining detecting device and detecting vehicle |
| CN108710122A (en) * | 2018-06-06 | 2018-10-26 | 招商局重庆交通科研设计院有限公司 | A kind of horn antenna and its detection method to highway tunnel lining |
| TWI696807B (en) * | 2019-10-22 | 2020-06-21 | 財團法人中興工程顧問社 | Tunnel cursor positioning transmitter |
| TWI707132B (en) * | 2019-10-22 | 2020-10-11 | 財團法人中興工程顧問社 | Gas measurement method of tunnel space infrared spectrometer |
| CN112902918A (en) * | 2021-01-15 | 2021-06-04 | 中国铁道科学研究院集团有限公司 | Tunnel lining detection device |
| CN113137952A (en) * | 2021-04-23 | 2021-07-20 | 交通运输部公路科学研究所 | Positioning method for tunnel section measuring point |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI696807B (en) * | 2019-10-22 | 2020-06-21 | 財團法人中興工程顧問社 | Tunnel cursor positioning transmitter |
| TWI707132B (en) * | 2019-10-22 | 2020-10-11 | 財團法人中興工程顧問社 | Gas measurement method of tunnel space infrared spectrometer |
| CN112902918A (en) * | 2021-01-15 | 2021-06-04 | 中国铁道科学研究院集团有限公司 | Tunnel lining detection device |
| CN112902918B (en) * | 2021-01-15 | 2022-07-08 | 中国铁道科学研究院集团有限公司 | Tunnel lining detection device |
| CN113137952A (en) * | 2021-04-23 | 2021-07-20 | 交通运输部公路科学研究所 | Positioning method for tunnel section measuring point |
| CN113137952B (en) * | 2021-04-23 | 2021-11-12 | 交通运输部公路科学研究所 | Positioning method for tunnel section measuring point |
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