Construction technology and practice of comprehensive observation site for cross-fault deformation

Abstract:

The construction of a three-dimensional comprehensive observation site for cross-fault deformation involves deploying multiple observation methods across the "surface-shallow-deep" layers along the same active fault. Relying on core construction techniques such as precision casing wall protection， precise control of borehole inclination， and deep wireline coring， a high-quality three-dimensional observation system is established. This forms a "three-dimensional array" characterized by high density， multi-frequency， and synchronous monitoring， capable of real-time detection of transient fault movements and long-term tracking of chronic strain accumulation. Drawing on the construction practices of the Cross-Fault Deformation Comprehensive Observation Site Project in Linyi City， Shandong Province， this paper introduces the construction technologies for two continuous observation stations， three comprehensive fault deformation observation piers， and one set of fault plane Newtonian force monitoring systems， ultimately establishing a three-dimensional comprehensive observation site for cross-fault deformation. The implementation of this project not only helps improve regional earthquake early warning capabilities and mitigate the losses caused by earthquake disasters， but also provides valuable data support for scientific research in fields such as geology and seismology， thereby promoting the development of related disciplines.