Construction of a Foundation Pit without Dewatering

In Beijing, dewatering has been strictly prohibited in foundation-pit excavation since March 1, 2008. Therefore, the deep foundation pit has to be constructed underground water level, which makes the construction of the water-resistant curtain and anchor quite difficult in granular soil. This paper introduces the construction of a foundation pit of underground garage with the excavation depth of 20.6 m. By improving construction techniques, a water-resistant curtain was constructed with good performance under a water head of up to 6 m in a granular soil layer with high permeability. The anchoring force is guaranteed in the case that cement slurry is lost after the water-resistant curtain is perforated underground water level. The project is a successful example of foundation pit engineering construction in the Beijing area.

Language

  • English

Media Info

  • Media Type: Web
  • Pagination: pp 900-909
  • Monograph Title: Tunneling and Underground Construction

Subject/Index Terms

Filing Info

  • Accession Number: 01531662
  • Record Type: Publication
  • ISBN: 9780784413449
  • Files: TRIS, ASCE
  • Created Date: May 22 2014 3:05PM