EXPERIMENTAL VERIFICATION OF GROUNDWATER DRAWDOWN BY THE JACKING METHOD FOR THE LIQUEFIABLE SOIL

Abstract

 Residential area of Maihama, Chiba City has received extensive damage by the liquefaction in 2011; The Great East Japan Earthquake. Chiba City immediately set up liquefaction Management Committee, Groundwater Drawdown Method was selected from the results of the experiment and investigation. However, exaction to place the water permeable pipe to drawdown the water from the ground generated a new problem; Ground Deformation.
 Therefore the authors have developed a new mechanism of placing the water permeable pipe by the Jacking method, experiments were carried out and analyzed over a period of 9 months in a park, verifying that the jacking method and the open cut method have the same effect, the study results are included in this paper.