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JDR Vol.7 No.6 pp. 726-732
(2012)
doi: 10.20965/jdr.2012.p0726

Paper:

Performance of Piled Raft Foundation with Grid-Form Ground Improvement During the 2011 off the Pacific Coast of Tohoku Earthquake

Akihiko Uchida*, Kiyoshi Yamashita*, and Nobuyuki Odajima**

*Research and Development Institute, Takenaka Corporation, 5-1, 1 Chome, Ohtsuka, Inzai, Chiba 270-1395, Japan

**Building Design Department, Takenaka Corporation, 1-1, 1 Chome, Shinsuna, Koto-ku, Tokyo 136-0075, Japan

Received:
July 17, 2012
Accepted:
October 18, 2012
Published:
December 1, 2012
Keywords:
liquefaction, grid-form ground improvement, piled raft foundation
Abstract

Grid-form ground improvement by the deep cement mixing method is one of the countermeasures against soil liquefaction. Improvements by this method were confirmed during the southern Hyogo Prefecture Earthquake in 1995. The number of building foundations adopting this method has increased in the last years. During the 2011 off the Pacific coast of Tohoku Earthquake, which occurred on March 11, severe liquefaction damage was observed in reclaimed land in the Tokyo Bay area. Since then, liquefaction countermeasures have been recognized to be important to reclaimed land. A building foundation improved by grid-form ground improvement method is introduced in this paper. Field investigation results of ground around the building after the 2011 earthquake are presented. The effect of liquefaction prevention on gridform ground improvement is discussed based on dynamic nonlinear analysis of soil layers with actual acceleration records. Comparing field investigation results to simulation analysis, we concluded that gridform ground improvement prevented liquefaction of original soil surrounded by grid-form walls during the 2011 earthquake.

Cite this article as:
Akihiko Uchida, Kiyoshi Yamashita, and Nobuyuki Odajima, “Performance of Piled Raft Foundation with Grid-Form Ground Improvement During the 2011 off the Pacific Coast of Tohoku Earthquake,” J. Disaster Res., Vol.7, No.6, pp. 726-732, 2012.
Data files:
References
  1. [1] Y. Suzuki, S. Saito, S. Onimaru, T. Kimura, A. Uchida, and R. Okumura, “Grid-shaped stabilized ground improved by deep cementmixing method against liquefaction for a building foundation,” Tsuchi-to-kiso, JGS, Vol.43, No.3, pp. 46-48, 1996 (in Japanese).
  2. [2] K. Tokimatsu, H. Mizuno, and M. Kakurai, “Building damage associated with geotechnical problems,” Special Issue of Soils and Foundations, pp. 219-234, 1996.
  3. [3] Architectural Institute of Japan, “Recommendations for Design of Building Foundations,” 2001 (in Japanese).
  4. [4] K. Yamashita, J. Hamada, and T. Yamada, “Field measurements on piled rafts with grid-form deep mixing walls on soft ground,” Geotechnical Engineering Journal of the SEAGS & AGSSEA, Vol.42, No.2, pp. 1-10, 2011.
  5. [5] Architectural Institute of Japan, “Recommendations for Design of Ground Improvement for Building Foundations,” 2006 (in Japanese).
  6. [6] Y. Taya, A. Uchida, M. Yoshizawa, S. Onimaru, K. Yamashita, and S. Tsukuni, “Simple method for determining lattice intervals in grid-form ground improvement,” Japanese Geotechnical Journal, Vol.3, No.3, pp. 203-212, 2008 (in Japanese).
  7. [7] National Research Institute for Earth Science and Disaster Prevention: K-NET,
    http://www.k-net.bosai.go.jp/ [accessed Mar. 30, 2011]
  8. [8] A. Uchida, N. Odajima, and K. Yamashita, “Performance of building foundation with grid-form ground improvement during the 2011 Tohoku Pacific Earthquake,” AIJ Journal of Technology and Design, 2012 (submitted, in Japanese).
  9. [9] T. Kuroda, H. Tanaka, Y. Tomii, and Y. Suzuki, “Evaluation of characteristics of improved soil by deep mixing method of soil stabilization,” Annual meeting for architectural institute of Japan, B-1, pp. 699-700, 2001 (in Japanese).

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Last updated on Jul. 20, 2021