20-10-2010 дата публикации
Номер: CN0101864963A
Автор:
WEIJUN DING,
FENGJIE DONG,
JIANGUO FAN,
LONGQIANG LI,
ZHIQIANG LI,
CHUANLING ZHOU,
HUAPING ZHU,
DING WEIJUN,
DONG FENGJIE,
FAN JIANGUO,
LI LONGQIANG,
LI ZHIQIANG,
ZHOU CHUANLING,
ZHU HUAPING
Принадлежит:
The invention discloses a large-section loess tunnel construction method, which comprises the following steps that: the whole section is divided into an upper part, a middle part, a lower part and a bottom part, wherein the middle part is divided into a middle left area, a middle right area and a middle intermediate area, the lower part is divided into a lower left area, a lower right area and a lower intermediate area, the four parts are excavated in a benching tunneling method with altitude differences, the upper part is 3-5m in front of the front middle part, the middle part is 3-5m in front of the front lower part, the lower part is 10m in front of the front bottom part, and the step-by-step tunneling excavation is carried out. The invention is suitable for collapsed loess areas, realizes the safe and reliable construction and saves a large number of temporary supporting steel frames. Due to the arc-shaped pilot tunnel method, the loop can be formed rapidly during excavation, the disturbance ...
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