Reconstruction and Measurement of Irregular Karst Caves Using BLST along the Shield Metro Line
This study investigated the application of the borehole laser scanning technology (BLST) method in the detection of both dry and water-filled karst caves. In order to solve the problem of excessive laser attenuation during the detection, we designed a test for the characteristics of multiwavelength...
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MDPI AG
2020-01-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/1/392 |
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| author | Shangqu Sun Liping Li Jing Wang Shuguang Song Peng He Zhongdong Fang |
| author_facet | Shangqu Sun Liping Li Jing Wang Shuguang Song Peng He Zhongdong Fang |
| author_sort | Shangqu Sun |
| collection | DOAJ |
| description | This study investigated the application of the borehole laser scanning technology (BLST) method in the detection of both dry and water-filled karst caves. In order to solve the problem of excessive laser attenuation during the detection, we designed a test for the characteristics of multiwavelength laser attenuation in water-filled karst caves and studied the influence exerted by various factors, including different wavelengths, different laser power levels, different suspended media, and effect of turbidity on the attenuation coefficient. During the test, we discovered the existence of a “blue-green window” with low turbidity and a “near infrared window” with high turbidity in karst cave water environments. Based on the general survey results of drilling and comprehensive geophysical prospecting, a quantitative method using targeted drilling was proposed to detect the spatial morphology of karst caves in complex environments. We also investigated the effects of complex environmental factors such as suspended media and high turbidity on the laser detection distance and accuracy in karst caves, and established a quantitative matching model of laser wavelengths, laser power, and complex environmental parameters. Based on this, we obtained the best acquisition mode for detecting lasers in different karst development environments. A high-precision, three-dimensional visualized model of a real karst cave was established to quantitatively obtain the characteristic parameters, such as accurate position, three-dimensional shape, space volume, and cave filling type, which was applied to the detection of karst caves along the Jinan subway line. |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-04-12T08:19:14Z |
| publishDate | 2020-01-01 |
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| spelling | doaj.art-cd9d1248de87439c8e40e758ed15674d2022-12-22T03:40:41ZengMDPI AGApplied Sciences2076-34172020-01-0110139210.3390/app10010392app10010392Reconstruction and Measurement of Irregular Karst Caves Using BLST along the Shield Metro LineShangqu Sun0Liping Li1Jing Wang2Shuguang Song3Peng He4Zhongdong Fang5Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266590, ChinaSchool of Qilu Transportation, Shandong University, Jinan 250061, ChinaSchool of Qilu Transportation, Shandong University, Jinan 250061, ChinaSchool of Transportation Engineering, Shandong Jianzhu University, Jinan 250101, ChinaShandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266590, ChinaSchool of Qilu Transportation, Shandong University, Jinan 250061, ChinaThis study investigated the application of the borehole laser scanning technology (BLST) method in the detection of both dry and water-filled karst caves. In order to solve the problem of excessive laser attenuation during the detection, we designed a test for the characteristics of multiwavelength laser attenuation in water-filled karst caves and studied the influence exerted by various factors, including different wavelengths, different laser power levels, different suspended media, and effect of turbidity on the attenuation coefficient. During the test, we discovered the existence of a “blue-green window” with low turbidity and a “near infrared window” with high turbidity in karst cave water environments. Based on the general survey results of drilling and comprehensive geophysical prospecting, a quantitative method using targeted drilling was proposed to detect the spatial morphology of karst caves in complex environments. We also investigated the effects of complex environmental factors such as suspended media and high turbidity on the laser detection distance and accuracy in karst caves, and established a quantitative matching model of laser wavelengths, laser power, and complex environmental parameters. Based on this, we obtained the best acquisition mode for detecting lasers in different karst development environments. A high-precision, three-dimensional visualized model of a real karst cave was established to quantitatively obtain the characteristic parameters, such as accurate position, three-dimensional shape, space volume, and cave filling type, which was applied to the detection of karst caves along the Jinan subway line.https://www.mdpi.com/2076-3417/10/1/392irregular karst cavemeasurement3d parametersblst methodshield metro |
| spellingShingle | Shangqu Sun Liping Li Jing Wang Shuguang Song Peng He Zhongdong Fang Reconstruction and Measurement of Irregular Karst Caves Using BLST along the Shield Metro Line Applied Sciences irregular karst cave measurement 3d parameters blst method shield metro |
| title | Reconstruction and Measurement of Irregular Karst Caves Using BLST along the Shield Metro Line |
| title_full | Reconstruction and Measurement of Irregular Karst Caves Using BLST along the Shield Metro Line |
| title_fullStr | Reconstruction and Measurement of Irregular Karst Caves Using BLST along the Shield Metro Line |
| title_full_unstemmed | Reconstruction and Measurement of Irregular Karst Caves Using BLST along the Shield Metro Line |
| title_short | Reconstruction and Measurement of Irregular Karst Caves Using BLST along the Shield Metro Line |
| title_sort | reconstruction and measurement of irregular karst caves using blst along the shield metro line |
| topic | irregular karst cave measurement 3d parameters blst method shield metro |
| url | https://www.mdpi.com/2076-3417/10/1/392 |
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