顶管工程中逆作圆形工作井结构计算

Structural design of reverse round working well for pipe jacking construction

以广州市北部水系建设沙河涌等三涌联合补水四期工程为例,主要介绍了逆作圆形工作井的设计计算过程,并提出了相应的工程措施来提高施工时井壁向上的阻力。在土质参数选取及边界条件设定时,充分考虑施工现场的不利因素来进行井壁内力及顶管顶进阻力的计算。实践证明:本工程计算方法有效可行,可供类似工程设计参考。

Taking the 4th-stage three-stream joint water replenishment project for the Northern water system of Guangzhou City as example, an introduction was made on the design and calculating process of reverse round work- ing well. Corresponding engineering measures were put forward to increase the upward resistance of well-wall dur- ing construction. With regard to selecting soil parameters and defining boundary conditions, the unfavorable factors of the construction site should be fully considered to calculate the internal force of well-wall and the jacking resis- tance. The practice of real project demonstrate this calculation method is effective and feasible.