CN113945288A - Karst tunnel face water inrush forecasting method based on infrared detection - Google Patents
Karst tunnel face water inrush forecasting method based on infrared detection Download PDFInfo
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- CN113945288A CN113945288A CN202111243172.8A CN202111243172A CN113945288A CN 113945288 A CN113945288 A CN 113945288A CN 202111243172 A CN202111243172 A CN 202111243172A CN 113945288 A CN113945288 A CN 113945288A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 238000013277 forecasting method Methods 0.000 title claims abstract description 7
- 230000005855 radiation Effects 0.000 claims abstract description 56
- 238000000034 method Methods 0.000 claims abstract description 32
- 238000012544 monitoring process Methods 0.000 claims abstract description 23
- 238000009412 basement excavation Methods 0.000 claims abstract description 16
- 238000010276 construction Methods 0.000 claims abstract description 15
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 230000009977 dual effect Effects 0.000 claims abstract description 5
- 238000009529 body temperature measurement Methods 0.000 claims description 4
- 238000011900 installation process Methods 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 claims description 3
- 230000003595 spectral effect Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 description 6
- 239000002243 precursor Substances 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 230000005641 tunneling Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/002—Investigating fluid-tightness of structures by using thermal means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J2005/0077—Imaging
Abstract
The invention relates to the technical field of tunnel engineering in geotechnical and underground engineering, in particular to a karst tunnel face water inrush forecasting method based on infrared detection, which comprises the following steps: monitoring a tunnel face in real time through an infrared radiation detection device, and generating infrared radiation monitoring data; analyzing the infrared radiation monitoring data through an infrared radiation system to obtain a tunnel face water inrush space-time rule in the tunnel excavation process; thirdly, revealing a water inrush mechanism under the dual effects of construction influence and karst water pressure of a karst cave during tunnel excavation according to the water inrush time-space rule; establishing a non-contact monitoring system by adopting an infrared technology, and collecting infrared radiation image data of the tunnel face; and fifthly, analyzing the infrared radiation image data by adopting MATLAB. The invention clearly reflects the water inrush temporal-spatial rule of the tunnel face by utilizing an infrared radiation system, thereby forecasting and preventing disasters such as water inrush, mud inrush and the like in the construction process.
Description
Technical Field
The invention relates to the technical field of tunnel engineering in geotechnical and underground engineering, in particular to a karst tunnel face water inrush forecasting method based on infrared detection.
Background
The karst area of China is vast, complicated underground water environment is accompanied, the construction process of the tunnel in the karst area is influenced by various factors such as karst development degree, karst distribution direction, karst fillers and the like, surrounding rock collapse is often caused by water inrush and mud inrush, tunnel construction is influenced, safety of constructors and mechanical equipment is seriously endangered, and development of the karst tunnel is seriously influenced, so that the research on strengthening prevention and treatment of tunnel water inrush disasters in the karst area is very important, theoretical analysis of tunnel mechanics cannot forecast water inrush time and water inrush range, actual engineering conditions cannot be completely reflected, unexpected harm is accompanied in the construction process, and safety of the constructors and the construction machinery is difficult to guarantee. In order to solve the problems, an infrared detector is adopted to observe the tunnel face, real-time observation data images are processed through software such as MATLAB and the like, the difficulties in mathematics and mechanics are avoided, the space-time evolution law before and after the water burst of the tunnel face in the excavation process of the karst tunnel is observed, the range and the law of the water burst of the tunnel face caused by the karst tunnel excavation are truly, comprehensively and intuitively reflected, and the construction safety is guaranteed.
Disclosure of Invention
The invention provides a method for forecasting water inrush from a tunnel face of a karst tunnel based on infrared detection, which utilizes an infrared radiation system to clearly reflect the time-space law of water inrush from the tunnel face, can visually present the time and range of water inrush from the tunnel face in the tunneling process of the karst tunnel, researches the identification, monitoring and forecasting of water inrush from the time-space comprehensive forecasting angle, establishes infrared time-space combined analysis and forecasting, obtains more accurate precursor information, and improves the accuracy of water damage forecasting. The method can effectively forecast and prevent disasters such as water inrush and mud inrush in the construction process, and can reduce the loss caused by water inrush accidents in actual engineering to a certain extent.
In order to achieve the purpose, the invention provides the following technical scheme: a karst tunnel face water inrush forecasting method based on infrared detection comprises the following steps:
monitoring a tunnel face in real time through an infrared radiation detection device, and generating infrared radiation monitoring data;
analyzing the infrared radiation monitoring data through an infrared radiation system to obtain a tunnel face water inrush space-time rule in the tunnel excavation process;
thirdly, revealing a water inrush mechanism under the dual effects of construction influence and karst water pressure of a karst cave during tunnel excavation according to the water inrush time-space rule;
establishing a non-contact monitoring system by adopting an infrared technology, and collecting infrared radiation image data of the tunnel face;
and fifthly, analyzing the infrared radiation image data by adopting MATLAB.
Preferably, in the first step, the infrared radiation detection device is fixed in front of the tunnel face and is arranged at an interval with the tunnel face; the distance of the interval is determined according to the specification of the infrared radiation detection device and the size of the cross section of the tunnel face.
Preferably, the real-time monitoring in the first step includes observing and data collecting the infrared temperature field editing and transmitting of the tunnel face in the excavation and lining installation processes.
Preferably, the infrared radiation detection device has a spatial resolution of 320 x 240 pixels, a spectral range of 7.5-13 μm, a temperature measurement range of-40 to +650 ℃, and a temperature sensitivity of 0.03 ℃.
The invention has the beneficial effects that: the infrared radiation system is utilized to clearly reflect the time-space law of water inrush on the tunnel face, the time and the range of water inrush on the tunnel face in the tunneling process of the karst tunnel can be visually presented, the identification, the monitoring and the prediction of water inrush are researched from the perspective of time-space comprehensive prediction, the infrared time-space combined analysis prediction is established, more accurate precursor information is obtained, and the accuracy of water damage prediction is improved. The method can effectively forecast and prevent disasters such as water inrush and mud inrush in the construction process, and can reduce the loss caused by water inrush accidents in actual engineering to a certain extent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of the infrared radiation detection operation of the present invention;
FIG. 2 is a schematic view of a location of a tool, a face, and a throw-away karst cave in accordance with an embodiment of the present invention;
fig. 3 is a schematic diagram of the structure behind the application scenario of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A karst tunnel face water inrush forecasting method based on infrared detection comprises the following steps:
monitoring a tunnel face in real time through an infrared radiation detection device, and generating infrared radiation monitoring data;
the infrared radiation detection device is fixed in front of the tunnel face and is arranged at intervals with the tunnel face; the distance of the interval is determined according to the specification of the infrared radiation detection device and the size of the cross section of the tunnel face.
Wherein, the real-time monitoring comprises observing and data collecting the infrared temperature field editing and transmitting of the tunnel face in the excavation and lining installation processes;
analyzing the infrared radiation monitoring data through an infrared radiation system to obtain a tunnel face water inrush space-time rule in the tunnel excavation process;
thirdly, revealing a water inrush mechanism under the dual effects of construction influence and karst water pressure of a karst cave during tunnel excavation according to the water inrush time-space rule;
establishing a non-contact monitoring system by adopting an infrared technology, and collecting infrared radiation image data of the tunnel face;
and fifthly, analyzing the infrared radiation image data by adopting MATLAB.
The method relies on an infrared detection technology, and the principle is that an infrared detector detects the change of an infrared radiation field in a certain range in front and displays the change of infrared radiation temperature. The nature of the temperature change is heat transfer, and the process is mainly affected by two factors: the temperature difference between the water body and the environment and the water leakage speed.
The method obtains the change rule of the radiation temperature and the space-time change rule of the water inrush range in the whole process of the water inrush of the palm surface based on test simulation, the water inrush of the palm surface is divided into four stages, namely water seepage, water dripping, water drenching and water inrush, tests show that the infrared radiation temperature of the palm surface shows a stage rising state in the loading process, then cracks caused by rock fracture are generated and sealed to maintain a horizontal state for a period of time until water seepage occurs, and the infrared radiation temperature can be reduced by 0.1-0.3 ℃ till then fluctuating rising and falling occur, but the whole body shows a falling trend; the infrared radiation temperature is increased at a high speed before large-area water dripping and water spraying, the highest speed can reach 0.05 ℃/s, the temperature is instantaneously reduced by about 0.2 ℃ when the water spraying and water dripping stage is carried out, then the temperature is continuously increased, the infrared radiation temperature is subjected to transient high-frequency sudden rising and falling when the temperature is increased to a certain temperature until water inrush occurs, and the temperature is greatly reduced to about 1.0 ℃.
Based on the method, the data result obtained by the test can be applied to a tunnel construction site to observe and forecast the tunnel face, the infrared radiation detection device can be installed on the rack and also can be fixed at a distance in front of the tunnel face, the specification of the distance-viewing device and the section size of the tunnel face are determined as shown in figures 1, 2 and 3, the tunnel face is monitored in real time in the tunnel, the infrared temperature field of the tunnel face in the processes of excavation, lining installation and the like is observed and data are acquired, the water inrush time-space rule of the tunnel face in the process of tunnel excavation is detected through an infrared radiation system, and the water inrush mechanism of the karst caves under the dual effects of construction influence and karst water pressure in the process of tunnel excavation is disclosed. A non-contact monitoring system is established by adopting an infrared technology, the infrared radiation image data of the palm surface is collected, and MATLAB is adopted to analyze the image data.
The thermal infrared imager can collect the lowest radiation temperature, the highest radiation temperature and the average radiation temperature of the surface of the observed object, respectively represent the minimum value, the maximum value and the average value of the temperatures of all pixel points in an observation area at a certain moment, and reflect the rule of the change of infrared radiation characteristics along with time. Through a contrast test, the lowest infrared radiation temperature can better reflect the infrared radiation characteristic change of each stage in the test process, so that the lowest infrared radiation temperature is used as an index of the water burst of the broken palm surface to analyze the infrared data in the test process.
As a preferred device, the infrared radiation detection device preferably adopts a FILRA325sc thermal infrared imager, the spatial resolution is 320 multiplied by 240 pixels, the spectral range is 7.5-13 mu m, the temperature measurement range is-40 to +650 ℃, the temperature sensitivity reaches 0.03 ℃, and the infrared radiation detection device has excellent image resolution and accurate temperature measurement capability.
According to the scheme, the infrared radiation system is utilized to clearly reflect the time-space law of water inrush of the tunnel face, the time and the range of water inrush of the tunnel face in the tunneling process of the karst tunnel can be visually presented, the identification, monitoring and forecasting of water inrush are researched from the perspective of time-space comprehensive forecasting, the infrared time-space combined analysis and forecasting is established, more accurate precursor information is obtained, and the accuracy of water damage forecasting is improved. The method can effectively forecast and prevent disasters such as water inrush and mud inrush in the construction process, and can reduce the loss caused by water inrush accidents in actual engineering to a certain extent.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. A karst tunnel face water inrush forecasting method based on infrared detection is characterized by comprising the following steps:
monitoring a tunnel face in real time through an infrared radiation detection device, and generating infrared radiation monitoring data;
analyzing the infrared radiation monitoring data through an infrared radiation system to obtain a tunnel face water inrush space-time rule in the tunnel excavation process;
thirdly, revealing a water inrush mechanism under the dual effects of construction influence and karst water pressure of a karst cave during tunnel excavation according to the water inrush time-space rule;
establishing a non-contact monitoring system by adopting an infrared technology, and collecting infrared radiation image data of the tunnel face;
and fifthly, analyzing the infrared radiation image data by adopting MATLAB.
2. The method for forecasting water inrush from tunnel face of karst tunnel based on infrared detection as claimed in claim 1, wherein: in the first step, the infrared radiation detection device is fixed in front of the tunnel face and is arranged at intervals with the tunnel face; the distance of the interval is determined according to the specification of the infrared radiation detection device and the size of the cross section of the tunnel face.
3. The method for forecasting water inrush from tunnel face of karst tunnel based on infrared detection as claimed in claim 1, wherein: and the real-time monitoring in the first step comprises editing and transmitting the infrared temperature field of the tunnel face in the excavation and lining installation processes and acquiring data.
4. The method for forecasting water inrush from tunnel face of karst tunnel based on infrared detection as claimed in claim 1, wherein: the spatial resolution of the infrared radiation detection device is 320 multiplied by 240 pixels, the spectral range is 7.5 to 13 mu m, the temperature measurement range is-40 to +650 ℃, and the temperature sensitivity is 0.03 ℃.
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| CN202111243172.8A CN113945288A (en) | 2021-10-25 | 2021-10-25 | Karst tunnel face water inrush forecasting method based on infrared detection |
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| CN202111243172.8A CN113945288A (en) | 2021-10-25 | 2021-10-25 | Karst tunnel face water inrush forecasting method based on infrared detection |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261982A (en) * | 2011-04-26 | 2011-11-30 | 同济大学 | Early warning method for water seepage of tunnel |
| CN105334548A (en) * | 2015-10-20 | 2016-02-17 | 中冶交通建设集团有限公司 | Geological forecasting method for tunnel construction in karst area |
| CN206431304U (en) * | 2017-01-13 | 2017-08-22 | 云南省水利水电勘测设计研究院 | A kind of advanced geology for tunnel construction predictor |
| CN107677372A (en) * | 2017-09-11 | 2018-02-09 | 华中科技大学 | A kind of tunnel detection method based on binocular vision |
| CN110529186A (en) * | 2019-09-11 | 2019-12-03 | 上海同岩土木工程科技股份有限公司 | Tunnel structure percolating water based on infrared thermal imaging accurately identifies device and method |
-
2021
- 2021-10-25 CN CN202111243172.8A patent/CN113945288A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261982A (en) * | 2011-04-26 | 2011-11-30 | 同济大学 | Early warning method for water seepage of tunnel |
| CN105334548A (en) * | 2015-10-20 | 2016-02-17 | 中冶交通建设集团有限公司 | Geological forecasting method for tunnel construction in karst area |
| CN206431304U (en) * | 2017-01-13 | 2017-08-22 | 云南省水利水电勘测设计研究院 | A kind of advanced geology for tunnel construction predictor |
| CN107677372A (en) * | 2017-09-11 | 2018-02-09 | 华中科技大学 | A kind of tunnel detection method based on binocular vision |
| CN110529186A (en) * | 2019-09-11 | 2019-12-03 | 上海同岩土木工程科技股份有限公司 | Tunnel structure percolating water based on infrared thermal imaging accurately identifies device and method |
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Application publication date: 20220118 |