矩形顶管施工引起的土体变形计算方法研究

Calculating Methods of Soil Deformation Induced by Rectangular Pipe Jacking Construction

分析了土体位移主要影响因素,对土体进行部分力学计算假定,使用梅德林解推导了分别由矩形顶管施工过程中的推进力、掘进机及管道侧摩阻力引起的土体变形计算公式;利用随机介质理论,推导了矩形顶管施工土体损失带来的土体变形计算公式.综合所有因素得到总变形公式,进行了土体变形规律分析并验证了计算公式的正确性.对矩形顶管推进引起的三维土体变形提供了简单的理论计算方法.

This paper analyzed the main factors influencing soil deformation .With certain assumptions , the computing formulas of soil deformation induced by bulkhead additive thrust , frictional force between pipe -jacking and soil derived from the Mindlin solution;the computing formulas of soil deformation caused by ground loss were obtained with stochastic medium theory .Combining all the deformation , the formulas of soil deforma-tion caused by rectangular pipe jacking construction were obtained .Regularity of soil deformation was analyzed and the accuracy of this method was proved .All of these are of reference value to further similar constructions .