Vertical and annular reinforcing steel bar stress and pipe-soil contact pressure during pipe jacking were monitored on the spot.
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。
2
In a second embodiment, the bag is provided with an outward fold, forming an annular cavity upon contact with the cavity containing the element to be extracted.