考虑泥浆触变性的顶管顶力计算方法  

Calculation of jacking force for pipe-jacking considering mud slurry thixotropy

作　　者：叶艺超[1] 彭立敏[1] 杨伟超[1] 雷明锋[1] 施成华[1] 王哲[1] 

机构地区：[1]中南大学土木工程学院,湖南长沙410075

出　　处：《岩土工程学报》2015年第9期1653-1659,共7页Chinese Journal of Geotechnical Engineering

基　　金：国家重点基础研究发展计划项目(2011C B013800)

摘　　要：顶管的顶力是顶管工程设计的关键控制参数之一,直接影响到其它参数的确定和工程造价,它的准确计算对顶管工程具有重要意义。在分析了目前顶管顶力计算方法的缺陷之后,基于弹性力学半无限空间柱形圆孔扩展理论和黏性流体力学平板模型理论,采用顶管顶进过程中管土"固—液"接触状态,推导了考虑泥浆触变性的顶管顶力的一种新的计算方法,并进行了实例验证。与既有方法的对比分析表明:该方法的计算结果与实测值更为吻合,而既有方法相对保守。Jacking force is one of the key parameters for pipe-jacking engineering, which directly affects the determination of other parameters and the cost. Therefore, its accurate calculation is of great significance. The existing methods for the jacking force have many to be satisfied. To deal with this problem, a new method considering mud slurry thixotropy is deduced based on the analytical solution to the classic problems of an elastic half plane with a circular cavity and the flat plates model of viscous fluids mechanics. It is different from the existing methods because it takes the contact state of the pipeline and its surrounding soils as＂solid to liquid＂, rather than＂solid to solid＂. Furthermore, the new method is used in an engineering case. Compared with the existing methods, the proposed method is more reasonable, and the existing methods are relatively conservative.

关 键 词：顶管 注浆 触变性 摩阻力 顶力 

分 类 号：TU452[建筑科学—岩土工程]