Mined metro station second lining buckle arch construction method
A construction method and underground excavation technology, which can be applied in wellbore lining, tunnel lining, underground chamber, etc., can solve the problems of repeated input of manpower and material resources, large space occupation, and long construction period, so as to improve construction efficiency and reduce construction costs. , the effect of reducing resource investment
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[0055] Such as figure 1 , figure 2 As shown, after the initial support of the middle arch and the side arch is penetrated, the side wall of the guide tunnel is broken in sections, and the length is 6m at one time. The waterproof layer is laid, and the second lining of the middle and side arches is poured back. The middle span is poured along with the top arch and steel rods are set. , The second lining of the mid-span arch is first, and the second lining of the arch on both sides is staggered from front to back by 8-12m.
[0056] image 3 , Figure 4 The steel formwork 1 uses a 4mm thick steel plate as the arc steel formwork, the arch 2 uses No. 10 I-beam as the arc formwork steel arch, and the support 3 uses No. 10 I-beam as the vertical steel arch. Support, the moving rail 4 uses No. 20 I-beam as the assembly-type mold carrier moving track, the pulley 5 uses steel pulleys as the assembly-type mold carrier moving system, and the longitudinal support 6 uses...
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