多技术链协同保障某超高层建筑超深大直径灌注桩承载力

Multi-technology chain collaboration ensures bearing capacity of ultra-deep large-diameter cast-in-place piles in a super high-rise building

摘要:

以温州凯迪中心超高层建筑项目为例，论述了其超深大直径灌注桩单桩承载力取值过程；通过旋挖与冲击钻进组合成孔技术、反循环除渣及泥浆净化技术、孔底沉渣检测技术、混凝土浇筑质量保障技术、两次桩底注浆技术等多技术链协同保障桩孔垂直度、孔底沉渣厚度、桩身混凝土质量、持力层承载力发挥等，为超高层超深大直径灌注桩承载力发挥提供重要的技术保障；同时通过基桩埋管声波透射法检测技术和超大吨位静载荷试验技术，为超高层建筑超大吨位超深灌注桩桩身完整性和承载力检验提供安全技术保障。本文对超高层建筑超大吨位超深大直径灌注桩承载力设计及发挥具有借鉴作用。

Abstract:

Taking the Wenzhou Kaidi Center super high-rise building project as an example， this paper discusses the process of determining the bearing capacity of its ultra-deep large-diameter cast-in-place piles. Through the collaborative application of multiple technology chains—including the combined rotary drilling and percussion drilling hole-forming technique， reverse circulation slag removal and mud purification technology， hole-bottom sediment detection technology， concrete pouring quality assurance technology， and two-stage pile bottom grouting technolog—the verticality of the pile holes， the thickness of sediment at the hole bottom， the quality of pile concrete， and the mobilization of bearing capacity in the load-bearing layer are effectively ensured. This provides important technical support for achieving the designed bearing capacity of ultra-deep large-diameter cast-in-place piles in super high-rise buildings. Furthermore， by employing the cross-hole sonic logging detection method with embedded pipes and ultra-high-tonnage static load testing technology， reliable safety assurance is provided for verifying the integrity and bearing capacity of ultra-high-tonnage， ultra-deep cast-in-place piles in super high-rise structures. This paper offers valuable insights for the design and performance realization of ultra-large-tonnage， ultra-deep large-diameter cast-in-place piles in super high-rise buildings.