Based on the geological information of a sea region and physical and mechanical properties of foundation soil there, an analysis calculation is made for the settlement of ground with concrete platform. The calculation method used in this paper is the same as that used widely in China and in the world.

A theory of three dimensional finite consolidation is established on co-moving system with Chen’s definition of strain, and the limitation of small deformation in classical consolidation theory is given up. The variation principle of energy rete and its generalized one in finite consolidation theory are proved in this paper.

Based on the stress-strain relationship and the properties of peak strength, residual strength, and brittleness of rock material, a perfect strain-softening model and related loading criteria are proposed by using the theory of elasto-plasticity. The physical concepts of this model are very clear with simple parameters, which is convenient for numerical analysis including finite element analysis.

Practical experience to reinforce the ground filled with city’s rubbish is presented in this paper. The method of inspect ramming reinforcement is discussed. With this experience, a new way is found to make buildings on the ground filled with city’s rubbish, which can save farmland and useful sites for other usage.

With the algebratical calculation of matrix for general expression of stress-strain relationship of anisotropic linear elastic material, it is shown that the stress-strain behavior for this kind of material depends not only upon mechanical properties of material, but also upon geometric relation between the action direction of deviator stresses and the physical symmetric planes of material. It is demonstrated that global stress tensor causes not deformity, but also volume change. The special dilatency rule for anisotropic linear elastic material is shown more clearly with calculation of a simple example.

A new program structure is given in this paper. In the new structure, a large scale computing program is broken down into a number of independent modules. Information is transmitted among different modules by data-base, so that all the modules can be developed, compiled, and especially suitable for small computers where a number of tasks can be done subsequently on small proportion or independently in several microcomputers at the same time. It is easy to develop, understand, and use program to solve practical problems with this kind of program structure.

A geological investigation is made for the mud-rock flow of Kuayanzigou. The reason to cause mud-rock flow there is analyzed preliminarily, and a comprehensive protection against it is proposed.

Since 1967, the study of stability on the dangerous rock masses of Lianziya has been made by our institute. The study includes the relative displacement monitoring of rift, testing study, and estimation of stability, etc. all that are brief reviewed in this paper. The test principle and method of long-term relative displacement monitoring of rift at Lianziya are proposed. The monitoring programs are established, and the monitoring results are analyzed with a conclusions given. The principle and method of testing study into rock and soil media are described, and various mechanical indices are obtained. The stability is evaluated for the dangerous rock masses at Lianziya and the slope at Houziling, according to the material from study.

The effects of stray parameters mainly from connecting cables on balance equation and sensitivity of bridge are discussed in this paper. It is possible to remove the effects of stray parameters, to a great extent, with a transformer-ratio-bridge adaptable to three terminal measurements. The undefinition of capacitance between two conductors without complete surrounding each other may be eliminated with a three terminal capacitor introduced. Therefore, it is possible to measure small variation of transducer capacity with a transformer-ratio-bridge, if a capacitive transducer is made with three terminal construction. A capacitive displacement transducer, transformer-ratio-bridge, and associated electronic circuit are developed according to this theory. It is shown by testing that a small variation down to 10-3 Pf of capacitance can be measured at 100m long cables, when the carrier frequency is 100KHz. It is also possible to make accuracy measurement at linger cables.

This paper introduces the structural characters and functions of the rock high pressure true triaxial machine newly developed and some research results with this machine. By the rock high pressure true triaxial machine, three principal stresses can be controlled and changed independently, so that any stress state and stress path in engineering rock mass and earth’s crust can be simulated. It is an important development of Karman type general triaxial machine. By RT3 type rock high pressure true triaxial machine, the maximum principal stress can be applied up to 800 MPa, the intermediate and minimum principal stress up to 200 MPa. The strains and parameters of sonic wave in the directions of three principal stresses can also be determined. The machine is used well for studying the basic theory on rock mechanics, the stability of engineering rock mass and the behaviors of earthquake precursors.

Simple shearing creep carried for a long time (494 day) indicates that the consolidation pressure affects the deformation and failure of clay soil heavily. So in the calculation of data, we must take the consolidation pressure into consideration. Furthermore, there is a time scale effect in the creep tests. In the laboratory, we carried out the balance shearing tests with strain-controlled simple shearing apparatus designed by myself, the test results are compared.

Shearing mechanical behaviors of composite joints model with consist of two kinds of different characters of joints and various inter-appearances in one plane have been studied in this paper. After a series of experiments on brittle-brittle, brittle-plastic, plastic-plastic type composite joint models, follow conclusions have been gotten. The shearing strength of composite joints has a relation not only with the area of sub-joints, but also with the times of inter-appearances of two sub-joints(K); and the shearing strength of composite joints has a relation with the shearing direction, that is to say, the shearing deformation-failure of composite joints is gradual. These conclusions are very important and useful for practical engineering.

This paper describes the studies of the petrology, the mineralogy and the microstructure of the rock formation in the mine area with electronic-microscope, optical-microscope, χ-ray diffractometer and spectrometer etc.. Finally, the microscopic mechanism of slope sliding baby are approached.

The problem of periodic array of cracks in 3-D space under shear loading which is interested in rock fracture mechanics has been investigated. The singular integral equation for the unknown crack opening displacement is derived. Numerical calculation has been taken for rectangular crack and the distribution of stress intensity factors along the crack edge has been obtained.

In this paper, the motion of the material points on the pile head is discussed, and based on this, several common waveforms are analyzed. At last, the approach of auto-identification waveform is discussed briefly.

The factor, which micro-strain transfers macro-strain, is inserted on the basis of Gerson constitutive theory. We deduced the damage constitutive theory, established the damage model and wrote out the iterative procedure. The theorical results are fit for experiment’s.

In this paper, the failure of model with different cracks is described. The test results of crack propagation is analyzed under uniaxial dynamic loading and static loading, and the similarities of the failure law followed by both and their differences are given.

This paper describes that setting up the steel sheets or slit cylinder etc. as the guide apparatus in bore holes can play the roles of controlling direction of cut-plane, of preventing internal wound of rock and increasing the distance between two neighbor bore holes when building stone is dug with non-explosive demolishing agent.

The initiation and propagation of all kinds of micro-fissures in rock results in the weakness of physical-mechanical properties of rock, which is the effect of damage to rock. The pseudo-damage variable ( ,) is defined according to the effect of fissure propagation to marble during Its rupture process. The relationships between stress and strain, and between damage factors D and D are derived. The results of damage testing is well tallied with theory results.

A new method of coupling problem with beam and block elements is developed, through single-point-constrained equations. This method seems more effective and accurate than other methods to deal with the coupling problem of different dimensional elements.

A mass of data form laboratory testing and prototype observation are investigated. An interpretation method for laboratory testing data is proposed. The selection and analysis of shear strength indexes are made by means of laboratory testing check prototype application period, back analysis of landslide, and field investigation, etc..