被动桩桩土相互作用研究现况与分析

Research Development and Analysis on the Passive Piles-soil Interaction

被动桩比主动桩复杂,一直是工程中关注的难点问题。随着城市地下空间开发利用的发展,深基坑开挖及隧道盾构推进引起的被动桩问题日益突出,当前这方面的研究尚不完善。在回顾总结被动桩已有研究成果的基础上,对被动桩荷载传递与p-δ曲线,桩侧极限土压力,群桩效应,深基坑开挖对邻近桩基影响方面的研究现况进行了较为详细的综述,列举了当前的研究理论、方法和成果,以及研究中一些热点问题,并对当前的研究现状进行简单评述,提出了目前需要重点研究的问题。

The behaviour of passive pile is more complicated than that of active pile and it was a difficult problem concerned by enginees. With the development of utilizing urban underground space, the passive piles induced by excavation and shield driving have become more and more obvious, but the study was incomplete. A detailed review about passive pile research was done, especially in the load-transfer of passive pile and p-~ curves, lateral limit earth pressure, group pile effect and piles adjacent to excavation. Some theories, methods, results and hot points of recent studies were reviewed and being commented briefly, some key problems were pointed out which need to be studied emphatically.