Drilled shafts - Keller North America
Drilled shafts are high-capacity deep foundation systems, also known as drilled piers, caissons, bored piles, or cast-in-drilled-hole piles (CIDH). Drilled shafts for structural support can be installed by the dry (open hole), stabilizing polymer slurry, or steel-cased methods.
Rotary drilling drilled shaft construction can be classified into three broad categories: The selected method depends on the subsurface. As the design depends on the construction method, it becomes part of the design process.
Drilled Shafts: Construction Procedures and LRFD Design Methods
This manual embraces both construction and design of drilled shafts, and addresses the following topics: applications of drilled shafts for transportation structure foundations; general requirements for subsurface investigations; construction means and methods; LRFD principles and overall design process; eotechnical design of drilled shafts for ...
Drilled Shafts: Construction Procedures and Design Methods
2018年9月1日 · This manual embraces both construction and design of drilled shafts, and addresses the following topics: applications of drilled shafts for transportation structure foundations; subsurface investigation specific to information required for construction and design of drilled shafts; construction means and methods; overall design process ...
General practices used for the construction of drilled shafts are briefly reviewed in this course. The influence of construction method and concrete quality on the development of side and base resistance is presented, and load transfer characteristics of drilled shafts are described.
Drilled Shafts: Construction Procedures and Design Methods
1999年8月1日 · The initial chapters cover an overview of the characteristics of drilled shafts, site investigations for drilled shafts (to collect information for both construction and design), and details of drilled shaft construction.
Chapter 4 - General Construction Methods - Pile Buck Magazine
From Drilled Shafts: Construction Procedures and LRFD Design Methods by FHWA. 4.1 INTRODUCTION. The effective use and design of drilled shafts requires knowledge of the construction methods used for these foundation elements.
What is a Drilled Shaft? Type of substructure foundation. A cylindrical shaft excavated into the ground and then filled with resteel & concrete. Supports loads primarily through skin friction between the concrete and the adjacent soil. End bearing generally not considered. Typical sizes: 30” to 72” in diameter and can
- [PDF]
Drilled Shafts - USF
Drilled shafts are deep, cylindrical, cast-in-place concrete foundations poured in and formed by a bored (i.e. “drilled”) excavation. They can range from 2 to 30 feet in diameter and can be over 300 feet in length. The term drilled shaft is synonymous with cast-in-situ piles, bored piles, rotary bored cast-in-situ piles, or simply shafts.
Drilled Shafts - Malcolm Drilling
Malcolm’s expansive fleet of modern equipment, utilizing the most advanced drilling and excavation techniques, ensures that projects can be constructed in highly variable ground. Shaft diameters typically range from 24 inches to 120 inches, with extreme sizes of 144 inches or more.