厦门市北溪引水主干渠结构断面设计分析

北溪引水主干渠为厦门市的供水主动脉，考虑到土地规划的需求以及供水升级的必要性，现对其马銮湾段进行升级改造。主干渠供水规模为16 m³/s，断面形式采用双孔钢筋混凝土箱涵。遵循断面设计需与地基适应性强，与原旧箱涵衔接方便等原则，将主干渠分为4种断面规格；并对其进行有限元计算分析，计算得出相应箱涵内力与抗浮成果。

Analysis on Structural Section Design of Beixi Diversion Trunk Canal in Xiamen

Beixi main diversion channel is the water supply aorta of Xiamen. Considering the need of land planning and the necessity of water supply upgrading, the Maluanwan section is now upgraded. The water supply capacity of the main channel is 16m_³/s, and the section form is double-hole reinforced concrete box culvert. In this paper, the main canal is divided into two section specifications according to the principles of strong adaptability of section design to the foundation, easy assurance of construction quality, convenient maintenance, low cost, and convenient connection with the original box culvert. The finite element analysis is carried out to provide reference and technical support for similar projects.