摘要
对于含深厚淤泥中的深基坑工程,开挖过程中形成的大变形,会诱发基坑和周边环境大变形和高应力,是基坑支护关注的首要问题,而被动区深层搅拌区加固的方法受到了广泛认可。本文基于三维数值模拟方法,通过结合工程实际,分析了坑底被动区加固对深基坑支护体系的位移的影响。结果表明:坑底被动区加固可以有效的抑制支护桩的侧向位移和坑底隆起,而对基坑外侧土体的侧向位移和沉降影响较小。对于研究在含深厚软土地基开挖过程中引起的基坑和周边地区的变形特性以及被动区加固效果方面具有一定的参考价值。
For a the passive zone improvement project of excavation with inner support structure in deep mud, the deformation and high stress of foundation and surrounding induced by excavation are the key problems to be concerned. It is widely approved that the passive zone improvement was one of most effective method to deal with the situation. Based on 3D numerical method and engineering application, the deformation of deep foundation pits and surrounding in thick mud was investigated. In order to measure the influence of reinforcement, the foundation with no strengthen was also concerned. The results show that： the, deformation of the bottom ground and retaining pile has significantly suppressed, however, the deformation of surrounding has little differenee after reinforcement. It is meaningful for researching the passive zone improvement of deep foundation pits with thick mud.
出处
《福建建设科技》
2015年第1期14-16,共3页
Fujian Construction Science & Technology
关键词
深基坑
被动区加固
数值模拟
水泥搅拌桩
deep foundation pit
reinforce in passive zone
numerical simulation
cement mixing pile
