Preventing Water Outburst in Excavation in Subsea Tunnel

With rapid development of the economy and society, many infrastructures of transportation logistics are being constructed all over the world. Xiamen subsea tunnel is an important door which connects Xiamen mainland with Xiang'an district, and is the first heavy section subsea tunnel on the Chinese Mainland. The beach cofferdam part of the Xiang'an tunnel faces risks of instability, inrush of water and water outburst when excavating through water-rich sand bed. Water outburst and drift sand happen and a big pit appears in the ground surface when service tunnel driving to some NK12+088 measurements such as draining, grouting for sealing water and jet grouting pile reinforcement. In order to prevent the project from water outburst, in this paper, the minimum impermeable layer thickness which keeps tunnel stability is proposed by project analogism and numerical calculation. Furthermore, the feasibility about layout of jet grouting pile reinforcement when encountering the above-mentioned risk is also studied. At last, the detailed suggestions for this project are proposed according to the results of numerical simulation.

Language

  • English

Media Info

  • Media Type: Web
  • Pagination: pp 2102-2107
  • Monograph Title: International Conference on Transportation Engineering 2009

Subject/Index Terms

Filing Info

  • Accession Number: 01528693
  • Record Type: Publication
  • ISBN: 9780784410394
  • Files: TRIS, ASCE
  • Created Date: Nov 12 2013 1:40PM