Bearing capacity and load transfer mechanism of static drill rooted nodular piles
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Bearing capacity and load transfer mechanism of static drill rooted nodular piles
Vol. 35, Issue 5, (2014)
作者机构:
1. 浙江大学 滨海与城市岩土工程研究中心,杭州,310058
2. 浙东建材集团,浙江,宁波,315000
作者简介:
基金信息:
DOI:
CLC:TU473
Online First:09 June 2014,
Published:2014
稿件说明:
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ZHOU Jia-jin, WANG Kui-hua, GONG Xiao-nan, et al. Bearing capacity and load transfer mechanism of static drill rooted nodular piles[J]. 2014, 35(5).
DOI:
ZHOU Jia-jin, WANG Kui-hua, GONG Xiao-nan, et al. Bearing capacity and load transfer mechanism of static drill rooted nodular piles[J]. 2014, 35(5).DOI:
Bearing capacity and load transfer mechanism of static drill rooted nodular piles
The static drill rooted nodular pile is a new type of composite pile foundation which consists of precast nodular pile and the cemented soil along the pile shaft. This kind of composite pile has a good bearing capacity
and the mud pollution will largely be reduced in its construction process. A group of experiments were conducted to provide a comparison between this composite pile and the bored pile. The axial force of the nodular pile was measured by the strain gauges attached on the pile shaft to analyze the distribution of the axial force and the skin friction along the shaft; and then a three-dimensional model was built by using the ABAQUS finite element program to investigate the load transfer mechanism of this composite pile in detail. The results of the field tests and ABAQUS simulation showed that: the bearing capacity of the static drill rooted nodular pile is better than that of the bored pile in soft soil area. The settlement of the composite pile is controlled by the precast pile
and the deformation of the precast pile and the cemented soil can be considered as deformation compatibility. The nodes on the nodular pile play an important role during the load transfer process; and the skin friction of the static drill rooted nodular pile is about 1.05-1.10 times of the skin friction of the bored pile in the same soil layer.