Debris Flow Mitigation With Flexible Ring Net
Barriers – Field Tests And Case Studies
Author(s)
C. Wendeler, B. W. McArdell, A. Volkwein, M. Denk
& E. Gröner
Abstract
A new type of debris flow mitigation measure, flexible ring-net barrier systems,
are cost-effective and efficient compared to massive concrete barriers. However,
the performance of these systems has not yet been investigated systematically.
For this reason a wire ring-net barrier system has been installed in the Illgraben
torrent, to investigate its performance, measure the forces and to provide
information on the expected maintenance. Additionally, this net-testing facility
allows for optimization of the structure and provides a basis for design
guidelines. This paper describes the measurement facilities at the barrier and the
debris flow events of 2006. First results of the filling event and their
interpretation with the computational model are discussed.
Keywords: debris flow mitigation, flexible debris flow barriers, numerical
simulation, field testing.
1 Introduction
Debris flows are initialised mostly by heavy rainfalls where the water quickly
infiltrates into and mobilizes the ground material in mountainous regions. They
flow downwards in riverbeds and along slopes, carrying large blocks and
boulders, and endanger humans and their infrastructure. To reduce debris flow
damage adequate protection measures have to be chosen. In regions where large
debris flows occur frequently the best protection measures are typically large
dams to re-route the debris to less vulnerable areas or special retention basins.
But for smaller volumes a new protection system, the flexible ring-net barrier
(Fig. 1), is now in a testing and developing phase in Switzerland. As shown here,
Keywords
debris flow mitigation, flexible debris flow barriers, numerical
simulation, field testing.
Related Book
Other papers in this volume
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