Monitoring a flexible barrier under the impact of large boulder and granular flow using conventional and optical fibre sensors

Jian Hua Yin, Jie Qiong Qin, Dao Yuan Tan, Zhuo Hui Zhu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


Flexible barriers, as one effective way to mitigate rock-fall hazards, have obvious advantages compared to the conventional concrete check-dams. It has been proved that a flexible barrier can perform well in trapping debris flow. In this study, an improved large-scale physical model for studying the impact of debris flow on a flexible barrier system is designed and constructed in Hong Kong. Some mechanical systems of the model are carefully designed to minimize the friction in door opening process. A comprehensive monitoring system has been specially designed and installed in this physical model. The system consists of conventional sensors (accelerometers, large tension-link force transducers, strain gauges on posts), special optical fibre sensors (small FBG tension-link force transducers, FBG basal friction transducers, FBG earth pressure cells), and high-speed cameras, high-frequency data-loggers, and computers. A single boulder impact test and a granular flow impact test were conducted using this large-scale physical model in order to evaluate the performance of the flexible barriers. In this paper, we will present the design and installation of this comprehensive monitoring system and selected test results.

Original languageEnglish
Title of host publicationSpringer Series in Geomechanics and Geoengineering
EditorsWei Wu, Hai-Sui Yu
Number of pages4
ISBN (Print)9783319971117
Publication statusPublished - 1 Jan 2018
EventChina-Europe Conference on Geotechnical Engineering, 2016 - Vienna, Austria
Duration: 13 Aug 201616 Aug 2016

Publication series

NameSpringer Series in Geomechanics and Geoengineering
ISSN (Print)1866-8755
ISSN (Electronic)1866-8763


ConferenceChina-Europe Conference on Geotechnical Engineering, 2016


  • Flexible barriers
  • Impact
  • Monitoring system
  • Optical fibre sensors

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Mechanics of Materials

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