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TECHNICAL GUIDELINE FOR CONDUCTING ROCKFALL STUDIES

GEORISK has draft a technical guideline for conducting rockfall studies. The guide tries to show all the steps to follow for the correct completion of a study against rockfalls, theoretically and in a comprehensive way, without entering into discussions or scientific criteria, which often, at least in many of the congresses I have assisted, they are very difficult to understand and put into practice.

 

The intention is to create a guide, simple but that complies with all the requirements established by the Austrian norm ONR24810 "Protection against rockfalls - terminology and definitions, effects, calculation of structures, inspection and maintenance", drafted by Austrian Standards in 2013, and revised in 2017.

 

This guideline won’t evaluate different study methodologies, because everyone seems to have developed their own; however, and from a more technical and legal point of view, I think it is worthwhile adapting all the current methodologies to the ONR24810 standard.

 

In the absence of an international consensus on how to design a protection against rockfalls, the Austrian authorities drafted the ONR24810, which establishes all the steps for a correct dimensioning of the protection structures. In the absence of other regulations at European or international level, this regulation is valid, by transposition, to all the member states of the EU, and it is applied, in addition, in several countries of Latin America.

 

In 2016, a guide on the design of passive protections against the rockfalls "Rockfall: Design considerations for passive protection structures" was drafted in New Zealand, which was governed essentially by the specifications of the ONR24810, as well as being also an advertisement for some of the companies that manufacture dynamic barriers.

 

Therefore, this guide will take you, step by step, and in the most entertaining way possible, to conduct a rockfall study, in order to be able, at the end, to determine which protection system is really necessary in each case. In any case it will be a scientific document, but quite the contrary, practical.

SLOPE PHOTOGRAMETRY MONITORING

GEORISK has been trained by UNIL (Université de Lausanne) to improve its knowledge about photogrametry and TLS. Currently owns a DJI Mavic 2 Pro drone to take pictures from the rocky slopes to generate a point cloud, and, comparing 2 points clouds of the same area, is capable to distinguish the areas which shown some deformetion or movement evidences, precursory of biggest rockfalls.

 

The main goal is to manage the rockfall risk in some alpine and andine areas where more than 500 m elevation rocky slopes can generate future rockfalls, putting people in a serious menace.

 

GEORISK is now one of the companies capable to conduct this kind of monitoring due the knowledge aquired in different worlwide areas, as well as because it has the UNIL assessment.

 

Currently is in process to aquire a ned DJI Matrice 210 V2 RTK to avoid interferences in railway network as well as to get more precision in drone positioning to avoid the generation of Ground Control Points, accelerating all the process.

 

ASK US FOR OUR SUPPORT 

STUDYING ROCKFALLS AND DEBRIS FLOWS PROCESSES IN A CHILEAN COPPER MINE

From September 2018 to April 2019, GEORISK has conducted several rockfall and debris flow studies in the acces road to a copper mine in Chile. More than 30 km of access road has been studied, in where more than 20 km has detected to be affected by rockfalls (some of the places with a block volume tipe of 50 m3. In total, 15 rocky slopes has been studied, as well as 17 gullies affected by debris flows.

At the end of the study, some areas had been described as non-protegible ones due the high energy of rockfalls, so, a photogrametry or TLS moniktoring campaig has been proposed to manage the risk in these areas.

THE ASSOCIATION OF GEOHAZARDS PROFESSIONALS

From 2018, April 27th, Georisk International joins the Association of Geohazards Professionals

EUROPEAN GEOSCIENCES UNION

From 2018, April 1st, Georisk International joins EGU

The European Geosciences Union, and has attended the EGU General Assembly in Vienna, from 8th to 13th of April, 2018

THE GEOLOGICAL SOCIETY OF AMERICA

From 2018, April 9th, Georisk International joins GSA

The Geological Society of America in order to improve the role of natural hazards management in the Americas. It's all about geology

ANDORRA MONITORING WITH LiDAR

From 31st October until 2nd November 2017, Georisk has conducted, in cooperation with the Université de Lausanne, a LiDAR monitoring campaign of the entire Solana d'Andorra slope in order to determine if there had been any kind of deformation since July 2012

ECORISQ

From 2017, November 1st, Georisk International joins the ECORISQ

International Association for Natural Hazards Risk Management

INTERNATIONAL SOCIETY FOR ROCK MECHANICS

From 2017, May 26th, Georisk International joins the International Society for Rock Mechanics as a Corporate Member

NEW ZEALAND ROAD SHOW

From April 22nd to May 7th 2017, Georisk has conducted a road show in several cities of New Zealand in order to introduce the ONR24810 to Administrations, engineering companies, and others.

The main reason is because in the current days, the Ministry of Busines, Innovation and Employement (MBI) together with the NZ Transport Agency and with the NZ Geotechnical Society have published their own guideline about rockfall protections "Design considerations for passive protection structures",  which mentions several times the ONR24810. 

ASSESSING PERU AGAINST DEBRIS FLOWS

Geosirk has conducted assessment in Peru during the period February-May 2017 to improve knowledge about how to protect people and infrastructure agains debris flows.

During the early 2017, Peru had been hit by several severe rainfalls, because of the "Coastal Niño" phenomenon.

Our mision in Peru was to assess Ministry of Defense, COEN, and ANA, as well as IMA (in Cusco) in order to give advertise to decision makers and others about the need to improve and install protections against debris flows, and also to donate a detailed study to the most damaged area, with its construction project.

Member of UNISDR

Ref. ISDR/OUT/2015/03482

28 January 2015

 

 

 

 

 

Dear Mr. Torrebadella,

 

We are pleased to welcome GEORISK INTERNATIONAL as a new member of UNISDR’s Disaster Risk Reduction Private Sector Partnership (DRR-PSP). Private sector members contribute to UNISDR’s mission to enhance resilience and further disaster risk reduction by bringing their knowledge of risk anticipation, risk management expertise and business initiatives in disaster mitigation.

 

Yours sincerely,

   

      Margareta Wahlström                                                Sandra Wu

Full welcome letter
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