T/CI 054-2023 Seismic zone debris flow control engineering design specifications

Scope

Scope: This document applies to the design of debris flow prevention and control projects in strong earthquake zones within 15-20 years after an earthquake, as well as to debris flow prevention and control projects in areas with a seismic intensity higher than Grade 8. For other regions with abundant loose material sources in gullies, the design of debris flow prevention and control projects can be carried out in accordance with this standard. For life-line projects such as railways, highways, waterways, water conservancy, power, mines, and oil and gas pipelines, special requirements may be made for the design of debris flow prevention and control projects, which can be studied separately. This document specifies the terminology and definitions, symbols, basic provisions, engineering design standards, determination of design parameters, design of sub-projects, design of engineering monitoring, and design of construction organization and measures for debris flow prevention and control projects in strong earthquake zones. Main technical content: 4. Debris flow prevention and control project design in strong earthquake zones 4.1 Division of design phases for debris flow prevention and control projects in strong earthquake zones Debris flow prevention and control projects in strong earthquake zones are designed in phases according to the basic construction process of the projects involved. Generally, the design is divided into three phases: feasibility study, construction drawing design, and modification design. The feasibility study should, based on the results of comprehensive geological surveys, conduct a comprehensive technical, economic, social, and environmental benefit analysis of various design schemes according to the prevention objectives, protected objects, and scope of treatment, and propose a recommended design scheme through comparison. The design documents should include a design report, design scheme drawings, and an estimate of the project investment.

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