岩土工程学报2012，Vol.34Issue(8)：1509-1515,7.
土体常规加卸荷对桩基影响模型试验系统研制与应用
Development and application of simulation system for model piles impacted by routine loading and unloading of soil
摘要
Abstract
A simulation system is developed to investigate the change in skin friction of piles due to the loading and unloading on the surface of soil. The system consists of four subsystems： loading and unloading, model piles, measuring system and automatic data acquisition system. The system can get higher pressure with the help of the pneumatic loading method so as to simulate the impact of soil compression and rebound on model piles under different soil properties and end restraint conditions. The validity of the apparatus is verified by elementary tests. The test results show that the system with high intelligence can achieve long-term constant load. Different end restraint conditions of piles are observed to have a significant influence on distribution of skin friction along the pile. And the strong rebound of the soil has little effect on skin friction of the upper part for bottom fixed piles and the whole for bottom free piles when the unloading ratio reaches 0.8. The system can be used to simulate the effect of the soil loading and unloading on piles.关键词
加卸荷/摩阻力/中性点/模型试验/模型桩Key words
loading and unloading/skin friction/neutral point/model test/model pile分类
建筑与水利引用本文复制引用
楼晓明,李德宁,杨敏,杨晶..土体常规加卸荷对桩基影响模型试验系统研制与应用[J].岩土工程学报,2012,34(8):1509-1515,7.基金项目
国家自然科学基金项目 （）
