Hybrid rockfall barrier — new design methodology based on the Colorado full-scale test experience

Cerro, Marco; Giacchetti, Giorgio; Lelli, Matteo; Grimod, Alberto; Arul, Adrian

doi:10.36487/acg_rep/1604_24_cerro

Cited by 3 publications

(2 citation statements)

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“…They also studied the interaction between falling rocks and nets, as well as the distribution of energy loss and grid deflection. Cerro et al (2016) proposed a simplified analysis model that took the energy of falling rocks and slopes into account to design the attenuator system. It provided a basis for the designer to select model attenuator and suggested that there was no international guide to guide the design of attenuator system in any case.…”

Section: Experimental Researchmentioning

confidence: 99%

A review of flexible protection in rockfall protection

Yang

Duan

et al. 2019

Nat Hazards

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Natural hazards, such as high winds, heavy rains and ice melting, can easily trigger the rockfall which usually leads to great personal injuries and property loss; therefore, the rockfall protection is of great significance and necessity. Among the types of protection, the flexible protection occupies a beneficial condition of application. This paper indicates the basics of flexible protection which includes its classification and advantages, subsequently, analyzing the mechanism of both active protection and passive protection, and then systematically summarizing the research accomplishments, and puts forward the research direction of the flexible protection, including: (1) apart from the traditional rigid protection, the flexible protection has a wide range of advantages, which makes the flexible protection a new and effective protective structure in the rockfall protection; (2) the current researches reveal that though the scholars have done a variety of achievements of flexible protection, there is still a lack of precise simulation of the whole model and local test of the component; (3) putting forward the prospective research direction minutely in both active protection and passive protection.

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Section: Experimental Researchmentioning

confidence: 99%

A review of flexible protection in rockfall protection

Yang

Duan

et al. 2019

Nat Hazards

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“…Due to the capital importance of these structures in the risk mitigation process, it is fundamental to guarantee their operativity and functionality over time. In fact, the efficiency of these protection structures can be affected by several factors such as damages caused by previous impacts, debris accumulation on the nets, and ageing phenomena induced by the exposure to natural elements [8][9][10]. In this context, the monitoring activity of the protection structures plays a central role in the assessment of the structure conditions and planning of maintenance works.…”

Section: Introductionmentioning

confidence: 99%

Impact identification on flexible rockfall barriers: on site test of a wireless monitoring system

Segalini

Valletta

Carri³

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Flexible rockfall barriers represent an effective measure to mitigate hazard related to falling boulders. The monitoring activity of these protection structures is essential to guarantee their functionality, and usually aims to verify the barrier conditions and to identify any impact on the net. The system here presented, called D-Fence, was specifically developed for the realtime monitoring of flexible rockfall barriers. It consists of a series of separate battery-powered devices installed on the uprights of the monitored structure and transmit data to the elaboration center through a wireless local network. Each module includes a 3D tilt sensor, allowing the near real-time monitoring of the rotation of the uprights, while the integration of a shock sensor makes it possible to measure in real-time the accelerations experienced by the barrier. The onsite test of the D-Fence system involved the installation of four modules on a prototype barrier located in a pilot site in Northern Italy. Each device was placed on a different upright and was connected to a local Wi-Fi network. In this configuration, two different concrete boulders were dropped on the barrier in order to test the D-Fence ability to measure the tilt variation of the uprights and identify the overcoming of a predefined acceleration threshold.

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Rockfall Hazard Analysis Based on the Concept of Functional Safety with Application to the Highway Network in South Korea

2021

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Numerous rockfall incidents involving infrastructure damage and loss of life have been reported along roads in mountainous terrain. Previous studies have used quantitative risk assessment approaches to identify the level of rockfall risk. However, appropriate quantitative indicators that are able to describe time-varying risk have not yet been developed. This study aims to develop a rockfall risk mitigation method based on reliability concepts, to classify rockfall data, to model the probability of rockfall occurrence, and to estimate the magnitude of risk reduction through mitigation measures. A synthetic measure of rockfall risk is proposed, which allows to compare directly and quantitatively the rockfall risk for different cut slopes under unmitigated and mitigated conditions. The proposed methodology can estimate the risk reduction obtained by using mitigation measures, such as introducing protections barriers, their periodic maintenance, and horizontal coverage ratio. This methodology was applied to 20 years of rockfall data collected by the Korea Expressway Corporation from 1215 artificial cut slopes along the highway network in South Korea. The rockfall frequency was analyzed based on the inventory data, and a rockfall hazard mitigation strategy was demonstrated by using the suggested methodology for the case study. It was shown that appropriate mitigation strategies, based on number of protection barriers, interval of periodic maintenance, and horizontal coverage ratio, can be devised to reduce the risk of different artificial slopes below a target failure probability. The approach shown in this study can provide insights into ways of improving overall risk management to prevent losses by rockfall.

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Hybrid rockfall barrier — new design methodology based on the Colorado full-scale test experience

Cited by 3 publications

References 0 publications

A review of flexible protection in rockfall protection

A review of flexible protection in rockfall protection

Impact identification on flexible rockfall barriers: on site test of a wireless monitoring system

Rockfall Hazard Analysis Based on the Concept of Functional Safety with Application to the Highway Network in South Korea

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