Abstract
Geology uncertainties and real-time construction modification induce an increase of construction risk for large-scale slope in hydraulic engineering. However, the real-time evaluation of slope safety during construction is still an unsettled issue for mapping large-scale slope hazards. In this study, the real-time safety evaluation method is proposed coupling a construction progress with numerical analysis of slope safety. New revealed geological information, excavation progress adjustment, and the support structures modification are updating into the slope safety information model-by-model restructuring. A dynamic connection mapping method between the slope restructuring model and the computable numerical model is illustrated. The numerical model can be generated rapidly and automatically in database. A real-time slope safety evaluation system is developed and its establishing method, prominent features, and application results are briefly introduced in this paper. In our system, the interpretation of potential slope risk is conducted coupling dynamic numerical forecast and monitoring data feedback. The real case study results in a comprehensive real-time safety evaluation application for large slope that illustrates the change of environmental factor and construction state over time.
Highlights
The high steep slopes are confronted with challenging problems and are closely related to reservoir safety, e.g., 430 m high Longtan slope (Guangxi province, China) and 692 m high Xiaowan slope (Yunnan province, China), as shown in Figure 1, with the main characteristics, including large scale, long engineering life, high safety standard, and the difficulties that are encountered in design, construction, and operation [1]
This paper extends previous studies and the primary differences between the present work and the previous study include: (1) a model and methodology for real-time slope safety evaluation during the construction for large-scale slope is proposed; (2) the slope safety assessment is achieved using both monitoring information and updated numerical results; and, (3) time-dependent evaluation system coupling analysis, forecast, and feedback is developed for large scale slope construction state
Because the instrumentation and monitoring technology technology and system of slope stability are relatively mature [27,28], our attention is concentrated on the real-time numerical model and system implementation
Summary
The high steep slopes are confronted with challenging problems and are closely related to reservoir safety, e.g., 430 m high Longtan slope (Guangxi province, China) and 692 m high Xiaowan slope (Yunnan province, China), as shown in Figure 1, with the main characteristics, including large scale, long engineering life, high safety standard, and the difficulties that are encountered in design, construction, and operation [1]. (2) historical monitoring data has generally been limited to identify and mitigate only one aspect of construction safety [26], rather than holistic assessment; and, (3) it is mainly a feedback approach and ignore numerical predictions, which prevents a dynamic construction schedule adjustment from being available In this regard, this paper extends previous studies and the primary differences between the present work and the previous study include: (1) a model and methodology for real-time slope safety evaluation during the construction for large-scale slope is proposed; (2) the slope safety assessment is achieved using both monitoring information and updated numerical results; and, (3) time-dependent evaluation system coupling analysis, forecast, and feedback is developed for large scale slope construction state
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