The calculation method and results of cyclic displacement and pore water pressure under a gravity platform foundation are presented in this paper. Those cyclic displacement and pore pressure are caused by the wave-load during a severe storm. The calculation of dissipation process of pore water pressure and then, of consolidated deformation are also performed. Finally, the reasonableness of the calculation method is discussed.

Series of mechanical tests have been carried out in situ and laboratory to Xintan landslip for researching its sliding mechanism and evaluating its stability. Based on these tests, C, φ parameters of the landslip before and behind the sliding have been introduced to use in the stability computations. It’s proved that the introduced mechanical parameters are suitable, the obtained Conclusion is proper, and the in-situ tests are the best.

The subsoil formed a double-layer structure during the dynamic compaction. Summarized from extensive in-situ test results, both the upper layer(A) and lower layer (B) have their own distinctions and independent each other. The interface of A and B occurs in the location of critical level of dynamic stress during the compaction, layer A is the area of densely compacted, most of the particles have a large deformation imparted by the high destructive stress, whereas layer B pertains to poorly compacted area with the character of small deformation and doesn’t lead to collapse with regardless of the number of blows. If the proper design and a treatment procedure are induced in the compaction, the upper can achieve a good bearing layer, which has a exponent increasing in bearing capacity value compared with that of to be treated, the bearing capacity of lower layer approximately to keep the average level of before treated soil even though with little fluctuated. From the practical point of view, the principle work is to entirely investigate the character and the thickness of upper layer, and to get a general knowledge to the definite depth of lower layer.

The phenomenon and cause of non-uniform distribution of pore water pressure in the torsional and triaxial shear tests are theoretically discussed in detail at first. According to the laboratorial studying and theoretical inferring, we then concluded that the critical axial strain in the triaxial shear tests is 0.15% and the critical shear strain in the torsional shear tests is 5.2% if the silt samples are subjected to a cyclic loading with the period of 8 second. Therefore, in the triaxial shear tests, we had better measure the pore water pressure at the center of silt samples, or rectify the pore water pressure measured at the basement. But in the torsional shear tests, it is feasible to measure the pore water pressure directly at the basement of the samples.

By the use of microscopic analyses and macroscopic tests, in this paper, the physical-chemical properties of the red clay in Shaoguan, Guangdong and the effects of some artificial treatments to its mechanical properties are studied. Although the red clay samples were from Shaoguan, the problems discussed here would be of universal significance for the red clays in other reigon.

An approach to the significance of the research of the stability management of open mining slopes, from the angle of scientific management, is dealt with in this paper; a detailed description in given to the substantial points about the above mentioned stability management; in addition, the prediction of landslips of slope rockmasses and the right time to treat and to reinforce the slides are also discussed in the paper, which has a practical significance to ensure safety in production.

A brief introduction is given to the basis, standard, procedure, method and measure of trench-checking for large-diameter hole injection piles and to the inspection and quality checking in the pile foundation construction.

In this paper, using static cone penetration test, borehole specimen test, dynamic loading test、static loading test and controlling the grouting quantity to monitor the quality of soil-cement pile in construction is presented, it is very useful for practical engineering constriction.

In this paper, a new type of large soil triaxial machine in detailed. The instrument which is composed of machine measurement and electrical measurement and automatic measurement with microcomputer, has the following functions: automatic monitor, control, analysis, printing and plotting. This paper also principally introduces the design method of software and hardware, working principle and its application example, that Fushung Branch of Coal Academia Sinica used this instrument to study stability of slope of an open pit, and bad gained satisfactory results.