The Dynamic Characteristic Experimental Method on the Composite Foundation with Rigid-Flexible Compound Piles

Jihui Ding, Weiyu Wang, Tuo Zhao, Junhui Feng, Panxing Zhang

College of Civil Engineering, Hebei University, Baoding, China.
Hebei Academy of Building Research, Shijiazhuang, China.

DOI: 10.4236/ojce.2013.32010                

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.

Keywords

Cement-Soil Piles; Cememt-Flyash-Gaavel Piles; Composite Foundation; Dynamic Characteristic; In-Site Test

Conflicts of Interest

The authors declare no conflicts of interest.

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