In recent years, several road collapse incidents have occurred in Shenzhen, raising concerns about the safety of urban infrastructure. To address these issues, the Shenzhen Geological Bureau commissioned a local geophysical exploration company to conduct surveys on suspected road sections. The primary method used was ground-penetrating radar (GPR) for surface scanning, which identified potential anomalies at 4m and 8m depths. However, due to significant measurement errors, the data from the GPR could not be fully relied upon for official geological reports. As a result, the bureau decided to purchase the Sauer single backpack core sampling rig to verify the findings through direct drilling.
The geological team took the rig to the identified anomaly zones. After preparing the site, they determined five drilling locations, with depths ranging from 4 meters to 12 meters. During the drilling process, the team monitored the footage and backwater conditions to assess underground geological structures. The Sauer rig is manually operated, and when it moves quickly without requiring much pressure, it often indicates the presence of an anomaly. The staff recorded the depth at which this occurred, calculated the thickness and location of the abnormal area, and then stopped the water supply to perform representative sampling. After three hours of work, the results were confirmed as accurate and reliable.
Five distinct areas were found between 3 and 4 meters underground, characterized by loose geological structures and high water content—indicative of a flowing sand layer. One hole near 8 meters showed a nearly 1-meter void, suggesting possible subsurface instability. These findings helped validate the initial geophysical data and provided critical insights into the underlying risks.
The Sauer single backpack core sampling rig is equipped with a specially designed diamond bit that offers long durability, fast drilling speed, and a maximum depth of 20 meters. This patented equipment, developed in the U.S., is lightweight and portable, allowing one person to carry and operate it easily. Its flexibility makes it ideal for use in construction sites, mining operations, and forensic investigations. A standard 3-meter Sauer rig weighs only 18kg, is easy to assemble and disassemble, and provides quick core sampling. It is widely used in geological mapping, mineral exploration, engineering inspections, and even for creating blasting holes.
Compared to traditional methods like manual excavation, trenching, or well testing, the Sauer rig significantly improves sampling efficiency while minimizing environmental damage. It preserves vegetation and reduces ecological disruption, making it an essential tool in shallow geological exploration. With its portability, accuracy, and eco-friendly approach, the Sauer rig has become a vital asset in modern geotechnical and environmental studies.
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