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

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.