Evaluation of deformation and earth pressure of temporary earth-retaining wall by centrifugal model test considering excavation process

DOI Web Site Open Access
  • NAKASHIMA Takuya
    Formally Railway Technical Research Institute (Currently West Japan Railway Company)
  • OZAKI Takumi
    Railway Technical Research Institute, Structures Technology Division, Foundation & Geotechnical Engineering
  • USHIDA Takashi
    Railway Technical Research Institute, Structures Technology Division, Foundation & Geotechnical Engineering
  • MATSUMARU Takaki
    Railway Technical Research Institute, Structures Technology Division, Foundation & Geotechnical Engineering
  • NAKAYAMA Takashi
    Railway Technical Research Institute, Structures Technology Division, Tunnels
  • HIRAOKA Nobutaka
    National Institute of Occupational Safety and Health, Japan, Construction Safety Research Group
  • KIKKAWA Naotaka
    National Institute of Occupational Safety and Health, Japan, Construction Safety Research Group
  • ITOH Kazuya
    Tokyo City University, Department of Urban & Civil Engineering, Geotechnical Engineering Laboratory

Bibliographic Information

Other Title
  • 遠心模型実験による掘削過程を考慮した掘削土留め工の変形・土圧評価

Description

<p>It is important to predict the deformation of the temporary earth-retaining wall and the surrounding ground when performing large-scale excavation near existing structures. However, the lateral pressure applied in the current design of excavation earth retaining work is calculated from various values of the ground based on the results of field measurements and laboratory tests uniformly regardless of the excavation step. It is rarely conducted to measure the lateral pressure and to compare the measured values with the value used in the designs. In this study, in order to clarify the relationship between the earth pressure distributions acting on the earth retaining wall and the amount of displacement, series of centrifugal excavation experiments were carried out using a centrifugal model experimental device which could consider the process of excavation in real construction works. As a result, it was confirmed that the earth pressure at the beginning of the excavation step is larger than the active side pressure applied by the current design method, and this value tends to decrease shallower than the excavation surface as the excavation work progresses.</p>

Journal

Keywords

Details 詳細情報について

Report a problem

Back to top