Nonlinear Analysis of Settlement for Cohesionless Soil Foundations Based on In Situ Tests

Abstract:

A new technique is proposed to calculate nonlinear settlement for foundation by using the data of plate loading test (PLT) and standard penetration test (SPT) or other in-situ tests. Firstly, hyperbolic curve is fitted out from the data of PLT and the tangent modulus equation of soil is established, then correctional tangent modulus (CTM) equation is established by feedback adjusting according to the fitting curve of PLT; Secondly, the CTM equations of different stratified soil at different depth are determined by soil parameters of SPT or other in-situ tests according to linear correlation; Finally, the nonlinear settlement of foundation is calculated by the layerwise summation method. An engineering application of settlement prediction for the largest oil tank in China indicated that this technique is able to calculate the entire nonlinear settlement from initiation to ultimate limit state and obtain accurate results, and it is suitable for cohesionless soil with high permeability.

• Periodical: Applied Mechanics and Materials (Volumes 204-208)
• Pages: 107-114
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.204-208.107
• Online since: October 2012
• Authors: Ren Ping Li, Jie Liu
• Keywords: In Situ Test, Cohesionless Soil, Correctional Tangent Modulus (CTM), Plate Loading Test (PLT), Settlement Prediction

References

[1] Burland, J. B. and Burbridge, M. C., 1985. Settlement of Foundations on Sand and Gravel[J]. Proc. Instn. Civ. Engrs., Part 1, Vol. 78, London, 1325–1381.

[2] Briaud, J. L., 2007. Spread Footings in Sand: Load Settlement Curve Approach[J]. Journal of Geotechnical and Geoenvironmental Engineering 133 (8): 905-920.

DOI: 10.1061/(asce)1090-0241(2007)133:8(905)

[3] DBJ15-31-2003. Code for Design of Building Boundation[S]. Beijing: China Architecture & Building Press, 2003.

[4] Gibbens R. and Briaud J.-L., Predicted and Measured Behavior of Five Spread Footings on Sand: Proceedings of a Prediction Symposium[M], Amer Society of Civil Engineers, Geotechnical Special Publication, No 41,1994.

[5] JGJ6-99, Technical Code for Building of Box and Raft Foundation[S]. Beijing: China Architecture & Building Press, 1999.

[6] Lehane, B. M., and Cosgrove E., 2000. Applying Rriaxial Compression Stiffness Data to Settlement Prediction of Shallow Foundations on Cohesionless Soil[J]. Geotechnical Engineering, Institution of Civil Engineers, U.K., 143: 191–200.

DOI: 10.1680/geng.2000.143.4.191

[7] Lehane, B. and Fahey, M., A Simplified Nonlinear Settlement Prediction Model for Foundations on Sand[J], Can. Geotech. J. 39: 293–303 (2002).

DOI: 10.1139/t01-091

[8] Schmertmann J. H. 1970. Static Cone to Compute Static Settlement over Sand[J]. J. Soil Mech. Found. Div., ASCE, 96(3), 1011-1043.

DOI: 10.1061/jsfeaq.0001418

[9] Schmertmann J. H., Hartman J. P. and Brown, P.R. 1978. Improved Strain Influence Factor Diagrams[J]. J. Geotech. Eng. Div., ASCE, 104(8), 1131-1135.

DOI: 10.1061/ajgeb6.0000683

[10] Sivakugan N., Eckersley J., and Li H. 1998. Settlement Predictions Using Neural Networks[J]. Australian Civil Eng. Transactions, CE40, 49-52.