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Design of barriers against recurrent debris flows

by Chiu, Yu-ho

Abstract (Summary)
(Uncorrected OCR) MSc in Applied Geosciences MSc Dissertation Design of Barriers against Recurrent Debris Flows - Abstract Abstract The objective of this report is to investigate and examine the characterization of debris movement and to investigate the methodology in the design of debris-resisting barrier. Debris can be simply described as scattered broken pieces of geological materials with water and organic matters. Flows are the movement term that can be defined as continuous irreversible deformation of a geological material that occurs in response to an applied stress under gravity. Debris-resisting barrier can be provided as a mitigation measure on the existing undeveloped terrain to control the debris flows hazard. In Chapter 1, the recognition, initiation and major mechanism of debris flows are presented. In Chapter 2, the method characterization of debris movement is examined and the methodology in landslide hazard assessment is investigated. The landslide hazard assessment based on the characterization of debris movement is also reviewed including: runout distance of debris, debris flow velocity, runup distance of debris and debris impact load. In Chapter 3, the methods of debris flows identification, susceptibility assessment and natural terrain hazard assessment are described. In Chapter 4, the design methodology of reinforced concrete debris-resisting barrier is described. In Chapter 5, two case studies for the design of proposed reinforced concrete debris-resisting barrier are described. Chapter 6 discusses the overall procedure of design of debris-resisting barrier from the view of Burland's Triangle of soil mechanics. Also, recommendations for a better hazard assessment are also presented. Chapter 7 concludes the findings of the study. By CYH l
Bibliographical Information:

Advisor:

School:The University of Hong Kong

School Location:China - Hong Kong SAR

Source Type:Master's Thesis

Keywords:debris avalanches control

ISBN:

Date of Publication:01/01/2003

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