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http://dx.doi.org/10.7474/TUS.2016.26.6.466

Pre-reinforcing Grouting a Sand Gravel Layer for Tunnelling  

Kim, Cheehwan (Department of Civil and Environmental Engineering, Woosuk University)
Publication Information
Tunnel and Underground Space / v.26, no.6, 2016 , pp. 466-474 More about this Journal
Abstract
Pre-reinforcement with umbrella arch grouting is conducted around a tunnel where a portion of the upper part of the tunnel is located in a sand and gravel layer. Surroundings of a first tunnel situated below groundwater table are reinforced with LW or SSM that is composed of ultra-fine cement and injected into multi-stages through large diameter steel pipes. With them, a first tunnel is safely excavated without both leaking of groundwater and fallings of sand and gravel from the arch. A second tunnel where groundwater is drained down to the bedrock is reinforced with jet grouting. The effect of the pre-grouting reinforcement is monitored by checking whether groundwater is dripping or sand or gravel is falling from the arch of the tunnels.
Keywords
Sand and gravel layer; Multi stage grouting through large diameter steel pipe; Jet grouting; LW injection volume; SSM injection volume;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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