Avalanche and Falling Rock Measurement Using Piezoelectric Dynamics and Static Sensors
Nobuhiro Shimoi,
Kazuhisa Nakasho,
Carlos Cuadra,
Masahiro Saijo,
Hirokazu Madokoro
Issue:
Volume 5, Issue 2, April 2017
Pages:
10-15
Received:
20 June 2017
Accepted:
26 July 2017
Published:
25 August 2017
Abstract: Under certain weather conditions, avalanches can occur because of snow cover on a steep slope. Such avalanches can reach snow fences that are arranged as countermeasures. Furthermore, traffic is completely blocked when fences collapse and snow falls on a road. Therefore, prediction of avalanche occurrence is important, but such predictions are considered difficult. To resolve this difficulty, this study assessed measurement of the danger degree by measuring the risk to the avalanche fence at the time of snowfall and falling rock according to changes in the load and the impact of voltage proportional to the avalanche barrier deformation. This measurement system has fixed sensors attached with mounting brackets to a dedicated avalanche prevention measurement fence. It measures the pressure and vibration measurement of the snowfall at the time of avalanche or rock fall occurrence at the main structure of the fence. Furthermore, this fence made of lumber from thinned timber is useful as a defensive barrier countermeasure against avalanches and falling rock. It is designed to withstand a snow load of 3–5 [t / m2] during an avalanche.
Abstract: Under certain weather conditions, avalanches can occur because of snow cover on a steep slope. Such avalanches can reach snow fences that are arranged as countermeasures. Furthermore, traffic is completely blocked when fences collapse and snow falls on a road. Therefore, prediction of avalanche occurrence is important, but such predictions are cons...
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By Means of Unmanned Aerial Vehicle (UAV) -Based Photogrammetry, Observing, Analyzing and Reporting of the Big Construction Projects, Ethiopia Application
Sinan Altinisik,
Semih Seckin Kavlak
Issue:
Volume 5, Issue 2, April 2017
Pages:
16-23
Received:
4 September 2017
Accepted:
28 September 2017
Published:
6 November 2017
Abstract: The method of map production by using UAV photogrammetry is widely-used in Turkey and World in recent years. With the developing technology, the capabilities of UAV platforms increase in parallel with the scale of projects, which are done by using UAVs, almost reaches to enough magnitude in order to compete with manned aircraft platforms. In the article, it has been discussed in observing, analyzing and reporting of cut and fill productions within the scope of 270km railway Project in Ethiopia. In the result of article, it has been evaluated that the maps required by large-scale construction projects can be produced by using UAVs within high accuracies and it has some advantages in time and cost.
Abstract: The method of map production by using UAV photogrammetry is widely-used in Turkey and World in recent years. With the developing technology, the capabilities of UAV platforms increase in parallel with the scale of projects, which are done by using UAVs, almost reaches to enough magnitude in order to compete with manned aircraft platforms. In the ar...
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