沉井水平承载力性能研究  

STUDY ON HORIZONTAL BEARING CAPACITY OF OPEN CAISSON

作　　者：陆凤池 熊森 叶海桃 

机构地区：[1]南京科技职业学院,南京210048 [2]长江南京航道工程局,南京210011

出　　处：《建筑技术》2016年第6期499-501,共3页Architecture Technology

摘　　要：顶管施工中，沉井后背土体的变形与稳定十分重要。作用在沉井的主要荷载有顶管顶力、后背土反力、井侧摩擦力和井底摩擦力。针对矩形沉井与圆形沉井进行受力分析，经计算得出当沉井井壁后背土体被压实直到剪切破坏时，前壁的土体与井壁会产生短时间的分离脱开。Deformation and stability of the back soil of an open caisson are very important in pipe jacking construction. Main loads on an open caisson include pipe jacking force, reaction force of back soil, side and bottom friction of open caisson. Forces on rectangular and round open caisson were analyzed and it was found that the front soil may depart from the side wall of an open caisson for a short time when the back soil was compacted till shear failure.

关 键 词：顶管 沉井 土反力 顶力 水平承载力 

分 类 号：TU473.2[建筑科学—结构工程] TU753.61[建筑科学—土工工程]