论文信息 - The use of miniature soil stress measuring cells in laboratory applications involving stress reversals

The use of miniature soil stress measuring cells in laboratory applications involving stress reversals

This paper describes the potential use of miniature soil stress measuring cells in model pile tests where normal stresses up to several MPa may be expected, accompanied by unloading and multiple substantial stress reversals. Devices rated in the 0.5 to 7 MPa range are considered and it is shown that they can develop marked cell-action effects, including strong non-linearity and hysteresis. A new approach to cell calibration and characteristic modelling is presented. It is shown that measurement errors may only be kept within tolerable limits through complex calibrations involving cells with suitable boundary conditions combined with a multi-stage loading history dependent, data reduction procedure.

[1] A. Fourie,et al. Studies of the influence of non-linear stress-strain characteristics in soil-structure interaction , 1986 .

[2] David White,et al. Lateral stress changes and shaft friction for model displacement piles in sand , 2005 .

[3] Fred H. Kulhawy,et al. Factors Affecting Stress Cell Measurements in Soil , 1982 .

[4] Richard J. Jardine,et al. Some observations of the effects of time on the capacity of piles driven in sand , 2006 .

[5] John Dunnicliff,et al. Geotechnical Instrumentation for Monitoring Field Performance , 1988 .

[6] A. Bishop,et al. Measurement of Soil Properties in the Triaxial Test , 1976 .

[7] J. K. Ingram. DEVELOPMENT OF A FREE-FIELD SOIL STRESS GAGE FOR STATIC AND DYNAMIC MEASUREMENTS , 1965 .

[8] C.R.I. Clayton,et al. The design of diaphragm-type boundary total stress cells , 1993 .

[9] Richard J. Jardine,et al. EXPERIMENTAL ARRANGEMENTS FOR INVESTIGATION OF SOIL STRESSES DEVELOPED AROUND A DISPLACEMENT PILE , 2009 .

[10] E. Selig. Soil Stress Gage Calibration , 1980 .

[11] R W Sparrow,et al. The influence of diaphragm flexibility on the performance of an earth pressure cell , 1967 .

[12] R. Jardine,et al. Design and Performance of the Imperial College Instrumented Pile , 1991 .

[13] Richard J. Jardine,et al. Effects of Time on Capacity of Pipe Piles in Dense Marine Sand , 1998 .

[14] Barry Lehane,et al. Mechanisms of Shaft Friction in Sand from Instrumented Pile Tests , 1994 .