近海淤泥地层超大直径盾构工作井设计

Design of Large-diameter Shield Working Shaft in Offshore Silt Stratum

摘要:

随着城市建设的推进,超大直径盾构隧道逐渐涌现于各种重大工程之中,而大尺寸、超深工作井也随之得到了应用。如何更好地对工作井的围护及结构进行设计,成为了超大直径盾构研究的重点之一。本文以珠海某近海淤泥地层超大直径盾构工作井为例,通过启明星软件对其围护结构的安全性及侧移进行了分析计算,同时采用Midas Civil软件建立三维模型,计算其结构弯矩及剪力,结果表明该工作井方案能满足各规范的要求,可为类似工程提供借鉴。

Abstract:

With the advancement of urban construction, the large-diameter shield tunnels gradually emerge in various major projects, and the large-size and ultra-deep working shafts have also been applied. How to better design the enclosure and structure of the working shaft has become one of the key points of the research on the ultra-large diameter shield. Taking the oversized diameter shield working shaft in the offshore silt stratum in Zhuhai as an example, the safety and lateral displacement of its enclosure structure are analyzed and calculated by using the Qixing software, and the 3D model is established by using the Midas Civil software to calculate its structural bending moment and shear force. The results show that the working shaft scheme can meet the requirements of various specifications and can provide reference for similar projects.