Cost reduction of diaphragm wall excavation using air foam

Yoshimasa Kondo, Takashi Nakayama, Hisanaga Naoe, Hirokazu Akagi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A novel stabilizing liquid using air foam rather than bentonite clay slurry, i.e. air foam suspension, is employed in order to stabilize the trench wall surface during a diaphragm wall excavation. Air foam suspension is used to reduce the construction costs of working on an underground diaphragm wall. Air foam suspension is created by mixing the excavated soil with air foam made from a surface-active chemical agent. The performance of air foam suspension depends on its density and consistency, that is, its table flow value (TF). By comparing the trench stabilization capacity of air foam suspension with that of bentonite clay slurry in model tests, the appropriate performance of air foam suspension was confirmed. The cost evaluation of using an air foam suspension for a diaphragm wall excavation is presented.

Original languageEnglish
Title of host publicationGeotechnical Aspects of Underground Construction in Soft Ground - Proceedings of the 5th International Conference of TC28 of the ISSMGE
Pages413-418
Number of pages6
Publication statusPublished - 2006 Dec 1
Event5th International Conference of TC28 of the International Society for Soil Mechanics and Geotechnical Engineering, ISSMGE - Amsterdam, Netherlands
Duration: 2005 Jun 152005 Jun 17

Publication series

NameGeotechnical Aspects of Underground Construction in Soft Ground - Proceedings of the 5th International Conference of TC28 of the ISSMGE

Conference

Conference5th International Conference of TC28 of the International Society for Soil Mechanics and Geotechnical Engineering, ISSMGE
CountryNetherlands
CityAmsterdam
Period05/6/1505/6/17

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ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geotechnical Engineering and Engineering Geology

Cite this

Kondo, Y., Nakayama, T., Naoe, H., & Akagi, H. (2006). Cost reduction of diaphragm wall excavation using air foam. In Geotechnical Aspects of Underground Construction in Soft Ground - Proceedings of the 5th International Conference of TC28 of the ISSMGE (pp. 413-418). (Geotechnical Aspects of Underground Construction in Soft Ground - Proceedings of the 5th International Conference of TC28 of the ISSMGE).