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The surveying and exploration work for the Qian-Gui Railway is pressing—safety during construction in the flood season cannot be neglected.
The second-line expansion project of the Qian-Gui Railway is located within the boundaries of Guangxi and Guizhou provinces. The line originates from Luoman Station and terminates at Longli Station, with a total length of approximately 412 km. Along the route, karst landforms—including caves, underground rivers, and faults—are exceptionally well-developed, posing significant potential hazards for future railway construction and presenting tremendous challenges to the geophysical exploration institute tasked with conducting the route’s survey.
Upon receiving the client’s assignment, the Geophysical Exploration Institute immediately established a comprehensive geophysical exploration project team and entered the work area to begin operations.
Through preliminary site surveys and tests, we ultimately integrated a variety of geophysical methods—including high-density electrical resistivity tomography, symmetric four-electrode resistivity sounding, three-electrode resistivity sounding, shear-wave logging, acoustic logging, and borehole television logging—to effectively identify unfavorable geological features such as karst development, aquifer characteristics, rock mass integrity, contact zones between different lithologies, and fault fracture zones along the roadbed and bridge sections. This provided ample foundational data for the remediation of both the roadbed and bridge segments. Additionally, by employing geophysical methods such as equivalent inverse magnetic flux transient electromagnetic method, audio-frequency magnetotelluric sounding, and comprehensive well logging, we successfully determined the locations and orientations of faults, as well as the integrity of the surrounding rock mass in the tunnel sections and the extent of karst development.
For more than two months, the technical staff of the Geophysical Exploration Institute’s Qian-Gui Second-Track Railway Survey Project Department have overcome numerous challenges—including steep mountainous terrain, rugged roads, scorching heat, and tight deadlines—and have now completed over 100 kilometers of integrated geophysical exploration. This work provides strong technical support for the design of the additional second-track line on the Qian-Gui Railway.
Currently, we are in the hot and rainy summer season. In accordance with the Group’s and the Geophysical Exploration Institute’s requirements for disaster prevention and risk mitigation during the flood season, the project team has conducted risk assessments targeting the primary hazard factors and has developed preventive measures and emergency response plans for the key hazards currently identified in the work area. We are closely monitoring weather and geological hazard warnings, fully preparing for and implementing preventive measures in areas under alert. We continuously remind workers to enhance their safety awareness, closely monitor critical points prone to production safety accidents, and carry out thorough hazard inspections. Any identified hazards will be addressed and rectified immediately, ensuring that safety management forms a closed-loop system. At present, the project is proceeding smoothly and in an orderly manner, all while maintaining strict adherence to safety standards.
Executive Producer | Zhang Guangda
Reviewed by | Zou Zhongping
Editor-in-charge | Zhou Huiying
Text | Wang Zhigang
Figure | Project Department
Editor | Wen Han
Address: No. 39 Qinghua Road, Qingyang District, Chengdu City, Sichuan Province
Email: sczywty@163.com
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