T/SCQA 423-2023 Technical Standards for Shield-driven Road Tunnels Crossing Urban Facilities

Scope

Scope: This document specifies the technical requirements for the shield-driven road tunnels crossing urban facilities in Shanghai City. This document applies to the planning, investigation, design, construction, monitoring, and emergency management of shield-driven road tunnels crossing urban facilities in Shanghai City. In addition to complying with this document, shield-driven road tunnels crossing urban facilities shall also comply with the provisions of relevant national, industry, and local standards currently in force. Main technical content: When planning the route of shield-driven tunnels, efforts should be made to avoid or minimize the number of structures (buildings) crossed by the shield-driven tunnels. When it is necessary to cross structures (buildings), the tunnels should be located as far away as possible from them, and construction methods with less impact on the environment should be adopted. The thickness of the overburden above the top of the shield-driven road tunnels, the net distance between parallel or intersecting tunnels, and the net distance between tunnels and various urban facilities shall be determined through comprehensive studies based on the surrounding environment, route alignment, engineering geology and hydrogeology conditions, tunnel diameter, structural safety, construction technology, and construction schedule. For shield-driven road tunnels within the safety protection areas of existing structures (buildings), the route design shall meet the safety protection requirements and management regulations of existing structures (buildings). When planning to cross existing structures (buildings) with shield-driven road tunnels, priority should be given to structures (buildings) with higher sensitivity, with a focus on protecting major urban facilities related to disaster prevention and mitigation. Urban facilities can be divided into four categories from high to low according to their socio-economic value, protection requirements, and

Development Information

Related Standards