Model test and theoretical study on XCC pile penetration effect based on transparent soil
Zhou Hang1,2,3 Kong Gangqiang4 Cui Yunliang5
1. Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Chongqing 400045, China
2. College of Civil Engineering, Chongqing University, Chongqing 400045, China
3. State Key Laboratory for Geomechanics and Deep Undergroup Engineering, China University of Mining & Technology, Xuzhou 221116, China
4. Hohai University, Nanjing 210098, China| 5. Zhejiang University, Hangzhou 310015, China
Abstract：X-section cast-in-place pile (XCC pile) is a new developed type of non-cylindrical cross section pile recently, whose penetration effect of XCC pile is different from the conventional circular cross section pile. Since the existing theoretical model and test technique are not suitable for investigating the non-cylindrical cross section pile, a new mode test technique is presented. Based on the deformation visualization technique of transparent soil, the soil displacement of the circular pile and XCC pile is investigated, respectively. The transparent soil model test technique is validated by comparing the test results of the circular pile with the theoretical prediction (cylindrical cavity expansion and strain path method). Subsequently, the XCC pile penetration test is conducted. Furthermore, a simple modified cavity expansion model is proposed to compute the radial displacement induced by the pile penetration, and the theoretical predictions are compared with the measured values to validate the modified cavity expansion model. The presented model test technique for the non-cylindrical pile and the modified cavity expansion mode can provide the theoretical base for investigating other non-cylindrical piles such as rectangular, Y-shaped and H-shaped cross section piles.
周航 孔纲强 崔允亮. #br#
基于透明土的XCC桩沉桩挤土效应模型试验及其理论研究[J]. 土木工程学报, 2017, 50(7): 99-109.
Zhou Hang Kong Gangqiang Cui Yunliang. Model test and theoretical study on XCC pile penetration effect based on transparent soil. 土木工程学报, 2017, 50(7): 99-109.
