Location

Arlington, Virginia

Session Start Date

8-11-2008

Session End Date

8-16-2008

Abstract

Under the condition of tamping energy 975~1125 kN.m per blow with four kinds of typical tampers including the shock absorbed and assembled tamper (SAAT) designed by the first author, the tests of vibration acceleration and relative tamping settlement are carried out in situ during the improvement of mud ground with high water content and great void ratio by use of the static-dynamic drainage consolidation method (SDDCM); the synthetic safety distances satisfying the requirement of relative code (under seismic intensity grade 7)are obtained under the condition. The test results show that SAAT enhances the effect of SDDCM in evidence and diminishes vibration influence on surrounding environment obviously. Besides, the laws on initial contact between the tampers and ground, tamper rebound, impact secondary action and transmission of vibration acceleration produced by impacting are analyzed.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Sixth Conference

Publisher

Missouri University of Science and Technology

Publication Date

8-11-2008

Document Version

Final Version

Rights

© 2008 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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A Case — Vibration Influences and Its Evaluation in Muck Ground Improvement with the Static-Dynamic Method

Arlington, Virginia

Under the condition of tamping energy 975~1125 kN.m per blow with four kinds of typical tampers including the shock absorbed and assembled tamper (SAAT) designed by the first author, the tests of vibration acceleration and relative tamping settlement are carried out in situ during the improvement of mud ground with high water content and great void ratio by use of the static-dynamic drainage consolidation method (SDDCM); the synthetic safety distances satisfying the requirement of relative code (under seismic intensity grade 7)are obtained under the condition. The test results show that SAAT enhances the effect of SDDCM in evidence and diminishes vibration influence on surrounding environment obviously. Besides, the laws on initial contact between the tampers and ground, tamper rebound, impact secondary action and transmission of vibration acceleration produced by impacting are analyzed.