Non-destructive dismantling method of negative ring segments after shield machine passes through intermediate air shaft

Abstract

The invention discloses a non-destructive dismantling method of negative ring segments after a shield machine passes through an intermediate air shaft, comprising the following specific steps: step 1,enabling a segment car for transporting segments and a working platform to be in position, connecting a top segment of a first ring with a special dismantling hanger by a bolt, and then respectivelyremoving connecting bolts between the top segment and adjacent segments; and starting the special dismantling hanger to hang the top segment to the segment car; step 2, repeating step 1, and then dismantling other segments of negative ring segments of the first ring and stacking on the segment car; transporting out the negative ring segments of the first ring by the segment car; step 3, repeatingstep 1 and step 2 for dismantling negative ring segments of other rings in sequence. The non-destructive dismantling method only needs 2 to 3 workers to cooperate to dismantle the negative ring segments, thus saving manpower; at the same time, the workers only need to assist in connecting one segment with a hanging ring assembly or removing the segments from the hanging ring assembly, the workloadis less, the dismantling efficiency is high, and the detached segments are stacked on the segment car to reduce the breakage rate.

Description

technical field [0001] The invention relates to urban rail engineering, in particular to a non-destructive removal method for a negative ring segment after a shield machine passes through an intermediate air shaft. Background technique [0002] With the large-scale development of domestic subway construction, the shield method tunnel construction technology has been widely used in subway tunnel construction because of its advantages of safety, speed, and wide adaptability. When the shield section is long, an intermediate air shaft with the function of ventilation and water collection will be set in the tunnel. During the shield construction, when the shield machine excavates to this place, the conventional excavation method cannot be used to pass through, and the empty push method is usually used. Pass through the tunnel at the wind shaft, that is, when the shield machine starts, a negative ring segment (i.e. a temporary segment) is installed between the reaction frame of th...

AI Technical Summary

Problems solved by technology

The traditional dismantling method is manual dismantling. During the dismantling process, at least 5 to 6 workers are required to cooperate to dismantle the segments one by one, which is labor intensive and wastes manpower. The gap is small (generally less than 1.0m), and the demolition space is small, which increases the difficulty of manual demolition, low demolition efficiency and potential safety hazards, and may also cause segment damage

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