Location

St. Louis, Missouri

Session Start Date

6-1-1993

Abstract

Piles in Bombay region are bored cast-in-situ installed by bailor and chisel boring or direct mud circulation with drop chisels. In weak and weathered rock interpretation of core drilling, SPT, CPT, pressuremeter tests are subject to several limitations, hence design parameters based on conventional soil investigation methods are subject to uncertainties. The past practice has been empirical and the designers relied mainly on load tests and failures have occurred in areas subject to considerable variation in rock characteristics and large depth of soft clay overburden. Recently improvements in investigation and design methodology have been introduced based on postulated relations of design parameters with energy inputs in chisel penetration. Concurrently, construction methods have been modified comprising air lift clean up, use of fabric liner and grouting of tip zone. The case histories provide load test and pile performance data for validation of postulated design parameters and evaluation of efficacy of construction methods.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Third Conference

Publisher

University of Missouri--Rolla

Publication Date

6-1-1993

Document Version

Final Version

Rights

© 1993 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Jun 1st, 12:00 AM

Case Histories of Pile Foundations in Bombay Region

St. Louis, Missouri

Piles in Bombay region are bored cast-in-situ installed by bailor and chisel boring or direct mud circulation with drop chisels. In weak and weathered rock interpretation of core drilling, SPT, CPT, pressuremeter tests are subject to several limitations, hence design parameters based on conventional soil investigation methods are subject to uncertainties. The past practice has been empirical and the designers relied mainly on load tests and failures have occurred in areas subject to considerable variation in rock characteristics and large depth of soft clay overburden. Recently improvements in investigation and design methodology have been introduced based on postulated relations of design parameters with energy inputs in chisel penetration. Concurrently, construction methods have been modified comprising air lift clean up, use of fabric liner and grouting of tip zone. The case histories provide load test and pile performance data for validation of postulated design parameters and evaluation of efficacy of construction methods.