摘要
针对河床清理不能爆破开挖,单、双壁钢围堰无法适用于深水下承台入岩较深的工况,提出了三壁钢套箱围堰技术方案,即利用双壁钢围堰解决基岩以上施工,内侧板与"地下连续墙"形成第3道围堰解决基岩部分施工。介绍了施工方案、三壁钢围堰和铣槽施工技术。实践证明:泰和赣江特大桥深水基础采用三壁钢围堰技术方案是成功的,根本解决了单壁、双壁钢围堰无法施工承台埋入基岩较深的桥梁深水基础施工难题,保证桥梁基础施工工期,结构坚固,更能满足水比较深、流速比较大的施工工况。
In view of the fact that the river bed can not be excavated by blasting and the single-walled and double-walled steel cofferdams can not solve the technical problems of deep-water caps penetrating deeper into the rock,the technical scheme of a three-walled steel box cofferdam is put forward in the paper,in which case the double-walled steel cofferdam is used for the construction above the bedrock and,the inside plate and"the underground continuous wall"together form a third cofferdam for the construction in the bedrock.Introduced in detail in the present paper are respectively the construction scheme,and the construction techniques for the three-walled steel box cofferdam and the milling grooves.Construction practice shows that the application of the technical scheme of the three-walled steel cofferdam to the construction of the deep-water foundation of the Ganjiang River Mega Bridge at Taihe is successful,with the technical difficulties in construction of the single-walled and the double-walled steel cofferdams being incapable of being applied to the construction of deep-water caps penetrating deeper into the bedrock fully overcome.With such techniques applied,the construction duration for the bridge foundation and the structural strength are both ensured.The construction techniques are more applicable to the construction conditions of deep water and high velocity.
作者
李汉军
LI Hanjun(The Engineering Managing Department of the Tunnel Bureau Group Co.Ltd.of China Railway,Guangzhou 511458,China)
出处
《国防交通工程与技术》
2018年第6期62-65,76,共5页
Traffic Engineering and Technology for National Defence
关键词
桥梁
深水基础
三壁钢围堰
铣槽
bridge
deep-water foundation
three-walled steel cofferdam
milling groove
作者简介
李汉军(1976—),男,工程师,主要从事土木工程施工技术管理工作。496792779@qq.com。
