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http://dx.doi.org/10.7474/TUS.2015.25.3.244

Case Study of a Shallow Tunnelling Through Complex Strata of Sand-Gravel and Rock Mass  

Kim, Cheehwan (Department of Civil and Environmental Engineering, Woosuk University)
Publication Information
Tunnel and Underground Space / v.25, no.3, 2015 , pp. 244-254 More about this Journal
Abstract
The tunnel is excavated through the alluvial layer composed of sand and gravel with groundwater deposited on rock. A portion of upper part of the tunnel is located in the alluvial layer and there are several buildings just above the curved section of the tunnel. It is necessary to prevent from sand-flowing into the tunnel due to low strength of the alluvial, high groundwater level and shallow depth of the tunnel from the ground surface. For this, the alluvial around the tunnel is pre-reinforced by umbrella arch method with multi-stage grouting through large diameter steel pipes or jet grouting before excavating the tunnel. The effect of the pre-reinforcement of the tunnel and the safety of the buildings are monitored by measurement of ground deformation occurred during tunnelling.
Keywords
Sand and gravel layer; Alluvial layer; Shallow tunnel; Multi stage grouting through large diameter steel pipe; Jet grouting;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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