重力式码头抛石基床重锤夯实施工效率改进研究  

Method for improving the efficiency of heavy tamping compaction of gravity wharf's rubble bed

作　　者：童新春 叶锋[2] 邱青长[2] 张宝洁 

机构地区：[1]中交四航局,广东广州510230 [2]中交四航工程研究院有限公司,广东广州510230

出　　处：《水运工程》2013年第3期199-203,共5页Port & Waterway Engineering

摘　　要：在重力式码头水下抛石基床厚度越来越大、同时爆夯法通常受环境制约不能采用的背景之下,提出对传统的重锤夯实工艺进行改进,即采用超重锤以及较大的基床分层厚度的施工工艺。首先设计了超重夯锤,并采用有限元方法计算得到了夯锤的绕流阻力系数及有效夯击能,再以有效夯击能估算基床的有效加固深度,在此基础上,将重锤夯实基床分层厚度从传统的2 m/层提高至4 m/层。厦门港嵩屿港区抛石基床的夯实施工结果表明,改进后的重锤夯实工艺效果较好,平均夯沉率达到了14.85%,而且施工效率显著提高,为类似工程提供了借鉴。Wifh the increase of the thickness of rubble bed, and under the condition the explosive tamping method usually can＇t be adopted because of environmental constraints,this paper recommends a renovation of the conventional heavy tamping compaction method,i.e.adopting super-heavy hammer and larger dividing thickness of the rubble bed. Firstly,the heavy-weight hammer is designed;Secondly,the resistance coefficient of surrounding flow and effective tamping energy is adopted by the finite element method;Thirdly,the effective reinforced depth of rubble bed is estimated with effective tamping energy. On this basis, the dividing thickness of rubble bed is increased to 4 meters. The construction results of Sonyu harbour in Xiamen showed that the improved process of heavy tamping compaction got a good result, as the average compacted rate reached as high as 14.85% and the efficiency increased significantly. It may serve as reference for similar engineering practices.

关 键 词：重力式码头 抛石基床 重锤夯实法 绕流阻力系数 有效夯击能 

分 类 号：U656.111[交通运输工程—港口、海岸及近海工程]