Transcription of Micropiles Design 101 - Structural Engineers
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Micropiles Design 101 - Structural Engineers
1 Micropiles Design 101 Allen Cadden P EAllen Cadden, Chester, PALas Vegas, NV 2008 Objective Develop a background understanding of the geotechnical and Structural Design processes for Micropiles in Structural foundation support for Considerations5Bi fD i Design for Engineers Fundamentals are similar to Fundamentals are similar to traditional pile Design However, due to the small Structural section, Structural Design and stiffness can often controloften control3 Designers Must UnderstandAvailable Tools Drilling rigs Drilling rigs Drilling methods Available Structural Materials Reasonable Bond ValuesValues Quality ControlConstruction Techniques Drill Rig 4 Micropile Materials Permanent Steel Pipe API 5CT & ASTM A252 80 ksi yield Flush joint threads Steel Reinforcement ASTM A615, Gr.
30 m long single span, AASHTO Type IV precast – prestressed concrete girders with concrete deck. Design Example - Step 4 Preliminary Pile Detail CasingCasing 5.5 in diam. .375 in wall Plunge Length Bo n Centralizer Top of Dense Gravel Plunge Length B o Centralizer Top of Dense Gravel Case 1 Type B Reinforcing Bar 2.25 in Grade 520 d Zone Neat ...
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