Tunnelling shields
    1.
    发明授权
    Tunnelling shields 失效
    隧道盾

    公开(公告)号:US3969906A

    公开(公告)日:1976-07-20

    申请号:US505947

    申请日:1974-09-13

    摘要: A tunnelling shield has a rearward rotatable part having a spiral rearward end to engage a forward end of a spiral tunnel lining. A drive mechanism rotates the rearward shield part as further tunnel segments are laid one by one in the shield end against the previous segment to be erected. Rams advance the shield as the rearward end rotates to allow a newly erected segment to engage the tunnel wall.

    摘要翻译: 隧道护罩具有可向后旋转的部分,其具有螺旋形的后端以接合螺旋隧道衬里的前端。 驱动机构使后挡板部分旋转,因为另外的隧道段相对于要竖立的先前段被逐个地放置在屏蔽端中。 当后端旋转时,公ams推进护罩,以允许新竖立的段接合隧道壁。