当前某些新型锚杆有忽视顶锚的不良倾向。作者介绍了新研制的楔管式锚杆的结构、加固原理、锚固性能、及其在现场条件下的拔拉试验与工业应用结果。
The authors described the structure of a newly - developed wedge-tube bolt, its reinforcement principles and anchoring performance, and the results of in situ pull test and productive applications.
理论分析和现场实测都显示，在类似于上海等地的软土地层中顶管施工，顶管周围土的运动问题是三维的。
Both theoretical analyses and field observations have shown that pipe jacking in such a kind of soft soil ground as in Shanghai area, movements of soils around the pipes is of three-dimension.
对顶进过程中管道纵向与环向钢筋应力及管土接触压力进行了现场测试。
Vertical and annular reinforcing steel bar stress and pipe-soil contact pressure during pipe jacking were monitored on the spot.
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