盾构隧道管片连接螺栓设计计算方法探讨

Study on Calculation Method of Bolt Design for Shield Tunnel Segment Connection

盾构隧道中管片连接螺栓是个重要的结构受力构件,施加于螺栓上的预紧力使管片缝间防水密封垫形成接触压应力而具有防水能力,同时,螺栓还承受着接缝面上水土压力或地震作用而产生的拉应力,现有设计规范对管片连接螺栓的设计配置无明确规定,造成设计和施工中的无章可循。文章就管片连接横向螺栓、纵向螺栓、螺栓预加力和螺栓安装扭矩等设计计算理论和计算方法进行探讨。

In shield tunnel, segment connecting bolts is an important structure component to bear forces which are applied in the segment joints by bolt pre-tightening force between waterproof gasket forming contact pressure stress with features of waterproof ability. At the same time, the bolt is also bearing force from joint surface water and soil pressure or the tensile stress from earthquake action. There is no clear stipulation in the existing design criterion on bolt design configuration for segment connection, resulting in no design and construction rules to follow. The paper discusses the segment connecting bolts, horizontal and vertical bolts, bolt pre-load forces and the bolt installation torque design calculation theory and calculation methods etc.