双排桩结构在滩海软基中的受力特性研究  

Mechanical characteristics of double-pile structure in foreshore soft foundation

作　　者：龙丽吉[1,2] 高鑫林 

机构地区：[1]大连理工大学建设工程学部,辽宁大连116024 [2]重庆西南水运科学研究所,国家内河航道整治工程技术中心,重庆400016 [3]中交二航局第二工程有限公司,重庆400074

出　　处：《水运工程》2015年第11期140-147,共8页Port & Waterway Engineering

摘　　要：研究了双排桩在滩海陆岸平台中的应用。根据弹性抗力杆件有限元法,采用数值计算软件ANSYS,分析了双排桩结构在不同的工况下的受力特性及双排桩的刚度、入土深度对结构内力和变形的影响。研究结果表明,双排桩在滩海软土地基上有很好的适用性,双排桩入土深度对结构的整体稳定性有很大的影响。桩身刚度的提高在一定程度上可以减少双排桩的水平位移,但桩基直径增加到临界极限后,双排桩出现近似刚体的运动,这种情况对软土地基受力状态是不利的。The application of double-pile in foreshore soft foundation is studied. Based on the elastic link finite element theory, the finite element software ANSYS is used to simulate the mechanical characteristics of double-pile under different conditions, and the influence on the displacements and internal forces of the double-pile stiffness and penetration depth. Results show that the double-pile is pretty well applied to the foreshore soft foundation. The penetration has great impact on the stability of structure. The increasing of the stiffness can reduce the horizontal displacement to some extent, but when the pile diameter reaches a certain critical threshold, double- pile appears rigid body motion which is not fit for the bearing capacity of soft foundation.

关 键 词：双排桩 滩海软基 弹性杆件 有限元 优化设计 

分 类 号：TU473.1[建筑科学—结构工程]