Abstract
To prevent stability risks and improve the optimal design capability for large underground caverns under the Engineering Procurement Construction (EPC) convention, an improved feedback analysis model is presented to adapt the integration of design and construction model for large underground engineering. A close stability optimization design and corresponding technical flowchart under EPC pattern were initially established by considering the cooperated-building parties. Some key optimization methods, including 3D monitoring, real-time stability warning, and cracking-restraint design, are proposed. Finally, a typical stress-structure case in the Baihetan underground cavern shows this optimizing process of close feedback analysis under EPC pattern, indicating the advantages of the presented method in opening and supporting optimizations.
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