摘要
依托苍容浔江大桥工程,对由大直径桩与桩间混凝土墙组合形成的锚碇基础的设计及受力特性开展相关研究。通过对苍容浔江大桥锚碇基础方案进行分析,阐明桥梁总体布置、锚碇基础、锚碇散索系统等方案设计,结合锚碇基础地质条件,对苍容浔江大桥南侧桩-墙组合锚碇基础的位移和内力进行分析。分析桩与墙连接形式对锚碇基础承载性能的影响,对锚碇基础采用桩与墙完全连接、桩与墙完全分离、桩与墙界面连接和纯桩基础4种桩-墙连接形式进行对比研究。结果表明:桩-墙组合基础的变形及内力在施工及挂缆运营工况下均满足需求;锚碇基础桩-墙完全连接为桩-墙连接理想最优形式,纯桩基础为桩-墙连接最差形式,但均能满足要求,且承载能力均大于2.0倍的缆力;桩-墙组合锚碇基础施工结束后,锚碇整体受力良好。
Based on the Cangrong Xunjiang Bridge project,relevant research was conducted on the design and stress characteristics of the large-diameter pile-wall composite anchor foundation.By analyzing the anchor foundation scheme of Cangrong Xunjiang Bridge,the overall layout of the bridge,anchor foundation,anchor cable system,and other design schemes were elucidated.Combined with the geological conditions of the anchor foundation,the displacement and internal force of the pile-wall composite anchor foundation on the south side of Cangrong Xunjiang Bridge were analyzed.The impact of pile-wall connection types on the bearing capacity of the anchor foundation was analyzed,and a comparative study was conducted on four types of pile-wall connection types:fully connected pile-wall,fully separated pile-wall,interface-connected pile-wall,and pure pile foundation.The research results indicate that the deformation and internal force of the pile-wall composite foundation meet the requirements under construction and cable-hoisting operation conditions.The fully connected pile-wall is the ideal optimal form,whereas the pure pile foundation is the least effective form.Despite this,both are capable of meeting the requirements and possess a bearing capacity over 2.0 times the cable force.Upon completion of the pile-wall composite anchor foundation,the overall structure is in a good state of stress.
作者
王大伟
师启龙
罗庆生
WANG Dawei;SHI Qilong;LUO Qingsheng(Guangxi Transportation Investment Group Co.,Ltd.,Nanning 528400,China;CCCC Highway Long Bridge Construction National Engineering Research Center Co.,Ltd.,Beijing 100011,China;Tongji University,Shanghai 200092,China)
出处
《工业建筑》
2025年第11期164-170,共7页
Industrial Construction
关键词
悬索桥
锚碇基础
桩-墙组合
界面连接
受力分析
suspension bridge
anchorage foundation
pile-wall composite
interface connection
stress analysis
