摘要
为了研究桩帽垫层对锤击沉桩效果的影响,采用有限元软件ABAQUS对弹性桩帽垫层和硬木垫层进行了模拟,发现弹性垫层在锤击过程中可显著降低桩身应力,而硬木板降低桩身应力的能力有限。采用合适厚度、刚度的垫层时,可显著增加贯入度。锤击能、垫层厚度、垫层刚度之间存在一定关系。对于某一垫层刚度,存在一最优垫层厚度,垫层刚度增加,最优垫层厚度范围也增加了。厚度较厚、刚度稍大的垫层能取得较好的沉桩效果。
Elastic pile cap cushion and hardwood cushion are simulated by ABAQUS,the famous finite element software,in order to study the influence of pile cap cushion on driving pile in this paper.It is discovered that elastic cushion can reduce the stress of the driven pile evidently during the driving process,but the capacity of reducing the pile stress of hardwood is poor.The penetration can be increased greatly with suitable thickness and stiffness of the cushion.There is certain relationship among hammering energy,thickness and stiffness of the cushion.A certain stiffness corresponds to an optimal thickness,the optimal thickness and the range of optimal thickness is enlarged with the increase of stiffness.Much better effectiveness of driving pile with thicker and suitable pile cap cushion can be obtained.
出处
《公路》
北大核心
2011年第4期74-77,共4页
Highway
基金
浙江省教育厅科研项目
项目编号Y200909687
关键词
锤击桩
桩帽垫层
厚度
刚度
贯入度
桩身应力
锤击能
driven pile
pile cap cushion
thickness
stiffness
penetration
stress of pile
driving energy
