Location

St. Louis, Missouri

Session Start Date

6-1-1993

Abstract

The design and performance of a surcharged highway embankment across a 45 metre thick soft soil deposit is described. Using theoretical soil mechanics concepts it was predicted that the long-term stability necessitated the use of berms despite the fact that an undrained strength analysis based on in situ vane tests predicted a reasonable factor of safety. This fact is supported by the performance of an existing road. Consideration of both theoretical soil mechanics concepts and practical considerations suggested that the berms should be construction prior to the central fill and from their outer limits towards the centre. The central fill was to be placed in thickness and in stages rather than to grades. Eighteen piezometers, 12 settlement tips and 24 surface settlement plates were used to measure the performance.

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

Performance of a Low Embankment on a Soft Soil Deposit

St. Louis, Missouri

The design and performance of a surcharged highway embankment across a 45 metre thick soft soil deposit is described. Using theoretical soil mechanics concepts it was predicted that the long-term stability necessitated the use of berms despite the fact that an undrained strength analysis based on in situ vane tests predicted a reasonable factor of safety. This fact is supported by the performance of an existing road. Consideration of both theoretical soil mechanics concepts and practical considerations suggested that the berms should be construction prior to the central fill and from their outer limits towards the centre. The central fill was to be placed in thickness and in stages rather than to grades. Eighteen piezometers, 12 settlement tips and 24 surface settlement plates were used to measure the performance.