Roof ripping construction method for tunnel inclined shaft to enter main tunnel
The invention relates to the technical field of tunnel construction, in particular to a roof ripping construction method for a tunnel inclined shaft to enter a main tunnel. The method comprises the following steps that S1, a transition section from the inclined shaft to the main tunnel is lifted, an...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention relates to the technical field of tunnel construction, in particular to a roof ripping construction method for a tunnel inclined shaft to enter a main tunnel. The method comprises the following steps that S1, a transition section from the inclined shaft to the main tunnel is lifted, and excavation and supporting are enhanced; S2, upper adit roof ripping excavation is carried out on an intersection section of the inclined shaft and the main tunnel and temporary support is carried out; S3, the transition section from the inclined shaft to the main tunnel is reinforced, and arch covering is carried out; S4, primary support is carried out an upper arc adit of the main tunnel; S5, middle steps are excavated in a left-right staggered mode, and primary support is constructed; S6, lower steps are excavated in a left-right staggered mode, and primary support is constructed; and S7, inverted arch concrete is constructed, so that the primary support is closed to form a ring. According to the construction m |
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