地质科技通报 (Jan 2023)
Engineering geological interface: From multivariate characterization to evolution mechanism
Abstract
The engineering geological interface is defined as the contact surfaces between two or more media in strata, as well as the transition surfaces that control the migration of three-phase matter, the change in physical states and the stability of rock and soil masses. Under the combined action of natural loads and engineering activities, they play a controlling role in the emergence, propagation, and triggering of geological disasters. How to accurately capture multifield evolution information, understand the catastrophic dynamics, and clarify the interaction mechanism of the interface are key scientific issues in the research field of geohazard mitigation and prevention. On the basis of reviewing the development history of engineering geological interface-related research areas, this paper summarizes the basic concepts, classification systems, and critical characteristics of the interface. Taking the landslides in the Three Gorges reservoir area of the Yangtze River as an example and combined with the research works of our team, we elaborated the latest research progress in multivariate characterization and evolution mechanism of engineering geological interfaces, and finally prospected the future development trends in this paper. The above review shows that the engineering geological interfaces is the critical zone inducing geological hazards, which can be divided into three types: material interface, state interface, and motion interface. By introducing fiber optic sensing and other technologies, the intelligent characterization of multivariate of engineering geological interfaces is preliminarily realized. On the basis of long-term in-situ monitoring of reservoir landslides, the disaster evolution mechanism and interface control modes are systematically summarized. According to the discipline development trend and national demand, more attention should be given to developing and building an integrated three-dimensional space-sky-surface-body monitoring network in the future, considering the characteristics of engineering geological interface. In this way, real-time acquisition and identification of thermal-hydrologic-mechanical multifield coupling information of key interfaces will be realized. By combining big data and artificial intelligence technologies, corresponding early warning and forecasting systems will be developed, so as to improve the prevention level and response capability of major geological disasters.
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