Abstract: In order to study the aseismic behavior of the compound supporting structure which is composed of frame structure of anchor cable in the upper part and sheet pile wall in the lower part, the large-scale shaking table model test is carried out. By imputting Darui wave excitations of different intensities, acceleration response and dynamic earth pressure response of compound supporting structure are investigated. Test results of dynamic earth pressure are compared with that calculated by code method and Mononobe-Okabe method (M-O method). The results show that: (1) The horizontal and vertical accelerations are magnified differently along the height of compound supporting structure under the seismic excitations with different intensities; and acceleration amplification effect increases with the increase of peak excitation acceleration. (2) The dynamic earth pressure increases with the increase of peak excitation acceleration at the back of sheet pile wall which is the lower part of the compound supporting structure; and the distribution of dynamic earth pressure along the wall height is small in the upper part and large in the lower part. (3) The current methods including code method and M-O method for calculation of dynamic earth pressure are reasonable in low intensity seismic area, but they need to be modified in high intensity seismic area.

Key words: compound supporting structure of high-steep slope, large-scale shaking table model test, dynamic earth pressure