Based on concept of endochronic theory and “plastic stress”, a new endochronic constitutive equation of soft rock is obtained by using the four groups of internal variables which represent different laws of displacement of soft rock. Compared with the experimental results the theoretical prediction is satisfactory.

In offshore soils there exists widely a kind if soil which mainly consists of silt and sand except clay with low plasticity. It is often considered a bearing layer of foundation. In this paper this kind of soil in the area of the south china sea where a gravity platform is to be constructed, is studied in the three cases: (1) behavior of static CU; (2) behavior under cyclic loading; (3) behavior of static CU after the soil has been cyclied. According to these laboratory results the mechanism is presented and discussed to explain its special mechanical behaviors

The two-dimensional nonlinear FEM results for Ertan project were introduced in this paper, which were analyses on the section 0+679m of the diversion tunnel on the right bank. The influence of the variation of rock properties on the stability of the tunnel and the role of step-by-step excavation and shotcrete and rock bolting were emphasized here. Some suggestions on construction were given. The paper is useful to the preliminary designs and construction for the diversion tunnel on the right bank.

This paper has done the spectrum analysis of deformity waveform and it’s each frequency element is rectified with measuring system frequency response curve by positive and inverse Fourier transform theoretical. If all of rectified frequency elements of waveform are superposed then real waveform would be obtained. This paper has done theoretical analysis and a practical method is introduced.

On the basis of the spectral analysis of blast and vibration waveforms, a review on the current methods of spectral estimation and their results is presented. The spectral features of blast signals are given as well.

For the purpose of in conjunction with the usage of the RSM-08 instantaneous signal processor, which was developed and made by our institute, useful software has been designed. In which the theory and methods of “digital signal analysis” have been applied. To the realized program, such as time measuring and amplitude measuring of acoustic waves, stress-strain analysis and microcomputer communication etc. , have been introduced. Also special stress has been laid on the introduction of the structure, algorithm and programming of data acquisition and processing program.