摘要
目前,我国现代化建设发展迅速,地基基础建设的发展也有了相应的进步。振冲碎石桩使用振冲器在软基中振冲形成孔洞后,将石料填至洞内形成密实的碎石桩与软土结合为一个整体,由碎石桩和桩间土相互作用形成复合地基,一起承担地基上部荷栽。在外部荷栽作用下复合地基中碎石桩和桩间土的变形模量不同,碎石桩体的刚度远大于周围土体的刚度,二者的变形也不相同。结果表明,当上部压力分布在基础上时,应力主要集中在碎石桩内,桩体承担了大部分荷载,桩间土的压力相应减少。通过振冲碎石桩处理,能提高复合地基的承载力和减少沉降。
At present,with the rapid development of Chin's modemization construction,the development of foundation construction has also made corresponding progress.After the vibroflotation gravel pile uses vibroflotation device toform a hole in the soft foundation,the stone is flled into the hole toform adense gravel pile,which is integrated with the soft soil toform a composite foundation by the interaction between the gravel pile and the soil between the pils to bear the upper load of the foundation.Underthe action ofextemal load,the defomation modulus of gravel pile and soil between piles are different,and the siffesss of gravel pile is far greater than that of surrounding soil,and the deformation of both is not the same.The results show that when the upper pressure is distributed on the foundation,the stress is mainly concentrated in the gravel pile,the pile bears most of the load,and the soil pressure between the piles decreases accordingly.The bearing capacity of the composite foundation can be reduced through the treatment ofcomposite foundation.
作者
张略
ZHANG Lve(Sichuan Airfield&Road Construction Engineering Co.Ltd.,Chengdu 610000,China)
出处
《工程建设与设计》
2020年第23期42-44,共3页
Construction & Design for Engineering
关键词
振冲碎石桩
软土复合地基
应用新探
vibrating gravel pile
soft soil composite foundation
application new exploration
