摘要
针对钻孔灌注桩桩头破除新技术,采用有限元数值模拟和理论分析方法,对具有预埋套管隔离钢筋的超灌桩头进行整体劈裂研究,探讨劈裂枪分离超灌桩头与桩身过程中劈裂面的形成与发展。基于劈裂面处的应力分布,提出桩头整体破除简化分析方法,并与有限元结果进行对比,验证该简易方法的正确性和有效性,为钻孔灌注桩桩头整体破除施工提供技术支持。
Based on the new demolition technology of bored pile heads,FEM and theoretical method are performed to analyze the demolition of the super pouring pile head with its reinforcing steel bars isolated.The formation and development of fracture surface between the super pouring pile head and pile shaft under the action of cleavage gun are studied.With the aid of the distribution of stresses on the fracture surface,a simplified method to the demolition of bored pile heads is proposed,which is verified to be correct and effective by comparing with BEM results.The proposed method can provide technical support to the demolition of super pouring pile heads.
作者
胡贺松
梁湖清
刘春林
彭文祥
HU Hesong;LIANG Huqing;LIU Chunlin;PENG Wenxiang(Guangzhou Institute of Building Science Co.,Ltd.,Guangzhou,Guangdong 510440,China;Guangzhou Municipal Construction Group Co.,Ltd.,Guangzhou,Guangdong 510030,China;School of Civil Engineering and Transportation,South China University of Technology,Guangzhou,Guangdong 510641,China;School of Geosciences and Info-Physics,Central South University,Changsha,Hu’nan 410083,China)
出处
《施工技术》
CAS
2019年第15期81-85,共5页
Construction Technology
基金
国家自然科学基金(51678171)
中国博士后科学基金(2019M652899)
广州市科技计划项目(201803030009)
广州市科技新星项目(201806010095)
关键词
钻孔灌注桩
预埋套管
劈裂枪
破除施工
有限元分析
bored piles
embedded casing
cleavage gun
demolition
finite element analysis
