The Dynamic Characteristic Experimental Method on the Composite Foundation with Rigid-Flexible Compound Piles
- 1 College of Civil Engineering, Hebei University, Baoding, China
- 2 Hebei Academy of Building Research, Shijiazhuang, China
- 3 Hebei Academy of Building Research, Shijiazhuang, China
- 4 College of Civil Engineering, Hebei University, Baoding, China
- 5 College of Civil Engineering, Hebei University, Baoding, China
Abstract
Based on the idea of optimization design of pile type, the composite foundations, which include cememt-flyash-gaavel (for short CFG) long piles and cement-soil ( for short CS ) short piles, and CS piles with CFG core as well, are formed. The method of the site dynamic characteristic tests of the composite foundations is discussed. The test results show that fireworks bomb may replace demolitions as the vibration resource. Vibration time is about 0.1 sec. Horizontal vibration major frequency is at 22.476 - 56.436 Hz, and vertical vibration major frequency is at 15.538 - 55.884 Hz. The pile arrangements of the composite foundation in the same site have more effect on the acceleration peak value. From the point of vibration, the anti-seismic effect of the CS piles with CFG core is better than others.
- China Academy of Building Research “JGJ 79-2002 Technical Code for Ground Treatment of Buildings(s),” China Architecture Industry Press, Beijing, 2002.
- J. H. Ding, F. R. Liu, E. X. Du, et al., “Dynamic Characteristic Analysis on Composite Foundation with Soil Cement Piles and CFG Piles,” Fly Ash Comprehensive Utilization, Vol. 6, 2008, pp. 37-40.
- W. Y. Wang, T. Zhao and Y. J. Meng, “The Numerical Analysis on Bearing Capacity of CFG Pile Composite Foundation under Blasting,” Engineering Mechanics, Vol. 29, No. S1, 2012, pp. 150-155.
- J. B. Jiang and S. C. Fu, “Seismic Reaction Analysis of the Composite Foundation,” Bulding Science, Vol. 1, 1996, pp. 23-28.
- W. Y. Wang, T. Zhao and J. H. Ding, “Influencing Factors of Dynamic Characteristics and Response of Cement-Fly Ash-Gravel Pile Composite Foundation,” Vol. S2, No. 215, 2010, pp. 115-118.
- T. Zhao, C. M. Yang and W. Y. Wang, “The Dynamic Characteristic Test Studies on CFG Pile Composite Foundation under Blasting,” Highway Traffic Science and Technology, Vol. 7, No. 67, 2010, pp. 121-122..