Inacces

Conditioning slopes on the N-260 road.

Patricia Baena — Wed, 09 Aug 2023 13:42:49 +0000

This action is part of the project of the Ministry of Transport, Mobility, and Urban Agenda for the improvement of National Road N-260 between Run and Campo. Our team has been working for over 2 years to condition the slopes and install the necessary protection systems to ensure the safety of vehicle passage through this crucial route in the Pyrenees of Huesca.

At the end of 2021, we began the first phase of the work, consisting of the installation of different dynamic barriers against rock falls from the slopes located above the road. The work was carried out in areas with difficult and very difficult access, requiring the use of personnel elevating platforms for the barriers located immediately above the road, and helicopters for barriers on more distant slopes, along with rope access techniques.

Currently, we are carrying out the work for a second phase. This involves the conditioning of the higher slopes above the road to prevent the fall of different rock blocks. Prior to the treatment of the terrain, an assessment was carried out to locate and prioritize the different unstable blocks, and solutions were designed to mitigate the geological risk of the slope. This solution consisted of installing different cable mesh panels held in place with anchors. For some specific blocks, the installation of cable straps was chosen to secure the blocks to the rock wall.

In this second phase, aerial means were used to transport equipment and machinery to the heads of the slopes and also for the placement of panels in designated areas.

INACCÉS GEOTÈCNICA VERTICAL will continue to work on this project led by the ministry until all the work for the mitigation of the geological risks that make up this natural landscape is completed.

Aware of the vital importance of this road for the Pyrenees region in which hit is located, these works have been carried out as quickly as possible to minimize the impact on traffic, and provisional protection barriers have been installed to work simultaneously with open traffic.

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The vital importance of installing rockfall barriers on railway tracks.

Patricia Baena — Fri, 23 Jun 2023 09:58:40 +0000

Safety is one of the most critical aspects in railway transportation. In the case of railway tracks, rockfalls pose a significant risk that can have catastrophic consequences. To prevent accidents and protect the lives of passengers and railway workers, the installation of rockfall barriers becomes an urgent necessity. In Spain, where numerous incidents related to rockfall have been reported, it is essential to understand the importance of these safety measures.

The Importance of Rockfall Barriers:

Passenger and worker safety: The primary reason for installing rockfall barriers on railway tracks is to ensure the safety of passengers and railway employees. These barriers act as a line of defense to prevent rocks from falling onto the tracks and moving trains. By preventing rockfalls, the risk of serious accidents is minimized, safeguarding the lives and well-being of everyone involved in railway transportation.

Reduction of delays and costs: Rockfalls on railway tracks can cause significant service delays, negatively impacting passengers and operational efficiency. The installation of proper barriers reduces the likelihood of incidents and, therefore, helps maintain train punctuality. Additionally, by preventing damage to the railway infrastructure and vehicles, costs associated with repairs and post-incident maintenance are reduced.

Preservation of railway infrastructure: Rockfalls can have a destructive impact on railway track infrastructure, leading to accelerated deterioration and increased maintenance costs. By installing adequate barriers, the railway infrastructure is protected from rock-induced damages, ensuring the long-term integrity of the tracks and reducing the need for costly repairs.

Compliance with regulations and safety standards: Rockfall barrier systems on railway tracks are essential to comply with regulations and safety standards set by railway authorities. These measures are part of a comprehensive approach to ensure the safety and quality of railway transportation, and their proper installation is a fundamental requirement to meet current regulations.

Conclusion:
The installation of rockfall barrier systems on railway tracks is of vital importance to ensure passenger safety, protect railway infrastructure, and maintain operational efficiency in railway transportation. The alarming rockfall statistics in Spain underscore the need to effectively implement these safety measures. Investing in the installation and maintenance of rockfall barriers is a crucial step to safeguard lives, prevent accidents, and promote a reliable and secure railway system in the country.

Images: Line Lleida – La Pobla de Segur of Ferrocarrils de la Generalitat de Catalunya.

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First 9,000 KJ dynamic barrier set up in the Iberian Peninsula.

Patricia Baena — Thu, 20 Apr 2023 14:07:53 +0000

At the end of last year, INACCÉS completed the installation of the first 9,000 KJ dynamic barrier in a gallery set up in the Iberian Peninsula. The location of the barrier in question was by the Lleida – La Pobla de Segur traint tracks through the Terradets Gorge, formed by the La Noguera Pallaresa River.

The promoter of the works was Ferrocarrils de la Generalitat de Catalunya and the project was designed by the Institut Cartografic i Geològic de Catalunya to improve the protection of this section of track. The project consisted of replacing an existing 5,000 KJ dynamic barrier with a new 350 m2 RB 9000 model made up of 6 posts of 7 meters long and separated 10 m from each other.

Due to the difficulty of access to the work site and the intention of not stopping the railway service of the Lleida – La Pobla de Segur line, the use of a helicopter was required as an auxiliary means for the assembly of the barriers. This service was carried out by the company Helitrans Pyrinees, a leader company in the field of helicopter work.

The first weeks of work consisted of drilling, with a hung skid,of the bases of the six posts and the anchoring points for the slings that held the tips of the barrier posts. The drilling consisted of a total of 152 meters of drilling in the wall at a height of approximately 10 meters above the railway.

Right after, the construction of the concrete plinths that would hold the bases with the pins of the posts continued.

After 4 weeks of work, the day arrived for the placement of the posts and the mesh panels of the barriers by helicopter. These works were carried out with 6 operators on the wall to receive the already slinged posts and panels. In total, 15 material transports were carried out, with loads of up to 800 kg. The transports were carried out with 23m slings with an electric hook at the end.

Once the structure was in position and provisionally attached to the wall, work continued on tensioning the cables and placing the mesh panel between the posts. Once this procedure was completed and its correct installation certified by Bianchini Ingeniero Maccaferri, work began on the removal of the old barrier that was located just below the new one.

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Emergency work due to the detachment of a retaining wall on the Sa Calobra road

Patricia Baena — Wed, 22 Mar 2023 11:21:49 +0000

The Ma-2141 road, an emblematic road of the Serra de Tramuntana, suffered a landslide at the beginning of February in one of the dry stone retaining walls characteristic of this road that leads to sa Calobra and Cala Tuent.

The Inaccés Geotécnica Vertical teams went to the scene and began emergency work to contain the danger and carry out the repair work on the wall in order to reopen the only access route to the tourist businesses in Sa Calobra.

After cleaning up the stone blocks that were still fragilely attached to the wall, the Soilnailing and filling of the wall works began in order to recover the original layout of the road. Soilnailing works are carried out with self-drilling anchors made with a hydraulic drilling rig hung from a crane. It was decided to work with compressed air and not with the traditional perforation with continuous concrete grout to avoid cement leaks as much as possible in this natural setting. Once the welded steel mesh is installed, the empty space will be filled with sprayed cement, leaving the necessary space to be able to make the last layer with the traditional dry stone stacking of the island of Mallorca.

The works have caused great expectation, not only among the residents and businesses in the area, but also with the authorities of the council of Mallorca, who took advantage of several site visits to inquire not only about the execution of the works but also about this solution, with which they think it could stabilize more retaining walls in the area that may suffer more landslides.

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Rockbreaking emergency work on the C-58 road.

Patricia Baena — Fri, 17 Mar 2023 14:33:19 +0000

Tuesday, 28th of February, traffic was cut off from 8:00 pm by a rock break on the C-58 road, at the height of Vacarisses. Inaccés Geotècnica Vertical set up three emergency teams to meet the needs of such action, where safety and action time are capital to establishing a new normality of vehicle circulation.
Once emergency interventions have been carried out, with the sanitation of unstable blocks by expansive pneumatic sacs, which facilitate work, they increase the safety, ergonomics, and efficiency of the operators. A temporary static barrier was also installed on the road so that one of the directions of movement could be opened up to obtain greater safety for drivers.
Finally, thanks to rapid response and the relevant safety measures, it was possible to open a way for the movement of the two directions.
We continue working with two teams to improve the stability of the slope by installing different solutions; one reinforced triple torsion metal mesh with anchorages and steel cables and another reinforced steel cable mesh with anchorages and steel cables.

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Stabilization Works in Muntanya de Montserrat

Patricia Baena — Wed, 24 May 2017 09:13:55 +0000

In INACCÉS GEOTÈCNICA VERTICAL, S.L. We execute Works in inaccessible places. Works such as photography in which we reinforce with rock anchors a rocky massif from the back of the Hotel Cisneros in the Muntanya de Montserrat, require the use of auxiliary equipment such as helicopters.

Once the rock anchors are drilled, the bars are placed and it is at this stage of the performance that a specialized helicopter company is required that can perform vertical work.

With continuous communication with emitter systems our operators coordinate with the pilot to execute the maneuver of placement of the bar and introduction of the same in the previously drilled ground. They are complex works that require a high degree of specialization.

The stabilization and reinforcement of the rocky massif in the spur origin of the detachment of the day 15 of December of 2010, affected to the dependencies of the Hotel Abad Cisneros, mainly the kitchen.

The works that INACCÉS GEOTÈCNICA VERTICAL, S.L. (Sanitation and light purge and point stabilization by means of rock anchors with steel rod and installation of steel wire mesh).

These actions were directed to control the detachments of blocks in unstable situation identified in the slope.

Structural reinforcement was also carried out for the rock spur, by means of steel bar anchors and reinforcement in the base with reinforced concrete.

The work is located in an environment of high mountain, with climatic implications that limited to a certain extent the seasonality of the works.

The terrain at work points is very rough, with steep slope, which required special work techniques.

The work was done in a place of incomparable landscape and sentimental value. For this reason, the execution of the work was designed to respect to the maximum the values of the place, and to protect to the maximum the facilities that are below the rocky spur.

In order to achieve this, at the environmental level, a strict program of environmental actions was followed in order to establish the controls, corrective measures and preventive measures to monitor the work from an environmental point of view, in order to minimize the environmental impact that can generate During the execution phase.

In order to carry out this program, the environmental aspects that could be influenced were identified, determining the preventive and corrective measures to mitigate these impacts, establishing responsible for the monitoring and control of the implementation of these preventive and corrective measures.

As a consequence of the need for helicopter use and as a particular feature of the work, special consideration was given to the impact of wildlife on all others. Adapted the plan of the works to times where there was no nesting of birds and avoiding always flying with helicopter sensitive areas with the presence of birds to avoid excess noise.

Stabilization Works

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Installation of a Dynamic barrier in Serra de Tramuntana. Mallorca.

Patricia Baena — Wed, 24 May 2017 09:04:09 +0000

A new 3,000-ki. Anti-rock dynamic barrier, 4 meters high, offers protection to users of the Ma2210 in the Serra de Tramuntana.

The barrier installed by INACCÉS GEOTÈCNICA VERTICAL, S.L., is of the type RMC300 / A has the capacity to absorb the impact of rock blocks with energies up to 3,000 KJ.

The technology of the intercept system of detachment is based on the interception mesh panel being placed at the barrier valley. The posts act independently of the mesh. If a pole is hit by a block and damaged, the adjacent poles absorb additional forces, ensuring that the system’s performance is not compromised.

The retention structure is continuous and formed by steel ring network panels. During impact the system ensures that the energy of the fall is dissipated, and the continuation of the falling motion of the block is avoided.

The barrier does not need steel anchorage cables to the valley. The energy dissipators guarantee high performance and high durability when working by deformation and not by friction. The barriers are certified according to UNI EN ISO 9001, in terms of dimensioning, manufacturing and marketing.

The installed barrier has passed the tests required by European regulations, namely the ETAG 027 “European Technical Guide for the approval of protection kits against rock fall”, having been tested in dynamic impact test on a barrier sample a Real scale of 3 spans, with a length of 10 meters of distance between poles and 5’0 meters of height. The test program was developed and carried out following the instructions given in the document “Guide ETAG 027 – Guide to the European Technical Suitability of Kits for Protection against Rockfall”.

MEL (Maximum Energy Level) Results: Energy: 3,136 kJ., Nominal Height of the barrier: 5.0 m. Maximum Elongation of the barrier: 6.05 m. Residual Height of the Barrier greater than 70% of the nominal height. ETAG Category A 027

The anti-slip dynamic barrier has been installed on a mountainous and steep terrain. However, because of the geometry of the system and its design, the forces developed on the lateral anchors are low, therefore, not excessively long anchoring lengths are required.

The bases of the posts have only the function of fixing the barrier to the ground, to where the loads are transferred through steel bars or micropiles.

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Trabajos de Estabilización de talud en el Puerto de Valldemossa

Patricia Baena — Tue, 18 Apr 2017 10:00:27 +0000

Las obras realizadas en este magnífico enclave, han consistido en la estabilización de taludes situados en el tramo de costa situado al sur del puerto de Valldemossa. El pie del talud está situado a nivel del mar, en la platja de ses dones, y su parte superior limita con una zona urbana edificada.

Un camino enredado entre la Serra de Tramuntana y el mar Mediterráneo conduce al pequeño puerto pesquero de Valldemossa.

La escarpada costa mallorquina esconde entre sus prominencias rocosas esta cala de cantos rodados, que albergaba una tranquila comunidad de marineros. Hoy en día, la mayoría de sus viviendas se han convertido en residencia de verano. Es, además, uno de los pocos puertos norteños resguardado y equipado para embarcaciones.

Este acantilado tiene una altura variable del orden de 20 a 25 metros y presentaba una situación inestable, constatándose que había sufrido un retroceso importante a lo largo de los últimos años debido a una combinación de factores relacionados principalmente con las características geológicas de la formación rocosa presente en el talud y los agentes erosivos que intervienen: acción marítima a pié del talud, aguas superficiales, viento, etc.

El retroceso del talud había llegado hasta el pié del muro de mampostería situado en su coronación, que había ya quedado descalzado en algunas zonas.

La composición de los suelos presentes en el acantilado, citados de arriba a abajo es la siguiente:

1.- Eolianitas y gravas del cuaternario situadas a unos 7 metros sobre el nivel del mar, de un espesor de unos 5 metros y formada por arenas, gravas y bloques cementados por carbonatos.

2.- Dolomía y brechas dolomíticas, formando resaltes de orden métrico y de naturaleza dolomítica.

3.- Areniscas y lutitas, es el material mas afectado además de los coluviones. Se distinguen dos tramos litológicos, las lutitas rojas con niveles de arenisca y las areniscas rojas y blancas

Este conjunto heterogéneo de suelos y rocas es altamente erosionable debido a la composición blanda de las areniscas y a la presencia generalizada de diaclasas y contactos entre diferentes estratos y diferentes formaciones rocosas.

INACCÉS GEOTÈCNICA VERTICAL, S.L., recibió el encargo de consolidar y proteger el acantilado.

Las actuaciones realizadas para la estabilización de taludes han sido las siguientes:

Por un lado se ha consolidado la base de apoyo del muro de mamposteria mediante un soil nailing realizado con hormigón proyectado de 15 centímetros de espesor, armado con malla electrosoldada del tipo 150×150 de 6 mm de diámetro, reforzado con anclajes en barra de acero de 25 mm de diámetro y 4 metros de longitud. El hormigón proyectado se ha coloreado para reducir su impacto visual.

En el resto del talud, se ha instalado una malla de triple torsión, clase A, protegida con PVC, reforzadas con bulones en barra de acero de 25 mm de diámetro de tres metros de longitud y cables de acero de 12 mm.

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Inaccés finaliza la Segunda Fase del proyecto de Protección contra los desprendimientos en el Yacimiento de Fumanyà

Patricia Baena — Fri, 31 Mar 2017 09:40:33 +0000

Entre los pequeños municipios de Fígols y Vallcebre, en la comarca del Berguedà se extiende una remota tierra de dinosaurios con uno de los vestigios más importantes de toda Europa de estas criaturas que habitaron la tierra durante el Cretáceo superior, hace más de 65 millones de años.

En mayo de 2016, el conjunto arqueológico de Fumanya sufrió un derrumbamiento de rocas. Alrededor de 1.200 metros cuadrados se dañaron con el derrumbe y con ello, algunas de las más de 3.500 huellas de dinosaurios saurópodos que alberga el conjunto.

Diez meses después del desprendimiento de roca, la zona del yacimiento paleontológico de Fumanya Sud está estabilizada.

INACCÉS GEOTÈCNICA VERTICAL, S.L., recibió el encargo de consolidar y proteger la zona de desprendimiento.

El trabajo ha consistido en purgar los bloques rocosos instables, la instalación de una barrera estática para la protección contra los desprendimientos, y la colocación de mallas de protección y bulones de bloqueo, y anclajes en barra de acero.

Características de la actuación

La barrera estática ha sido construida con perfiles metálicos HEB 160, sujetos al terreno con bulones en barra de acero y malla de cable del tipo 300×300 de 8 mm de diámetro.

La malla de triple torsión instalada ha sido del tipo 8×10, de 2,7 mm de diámetro con una resistencia media a la rotura de 42,3 Kn.

Lo anclajes y bulones se han realizado en garra de acero tipo GEWI de 25 mm de diámetro.

Esta actuación forma parte de las medidas prioritarias que, con carácter de urgencia, acordaron las instituciones implicadas en la conservación del yacimiento para garantizar la seguridad de las personas y evitar nuevos desprendimientos.

En la actualidad, Cultura ya ha iniciado los preparativos de la tercera fase de las actuaciones acordadas, que consiste en la realización de un estudio integral del yacimiento para su protección, conservación y puesta en valor.

El yacimiento de Fumanya Sur forma parte del conjunto paleontológico que incluye también los yacimientos de Fumanya Norte, Mina Ardilla, Mina Tumi y Riscos de Boixader, declarados todos ellos bienes culturales de interés nacional en la categoría de zona paleontológica el 8 de abril de 2014.

Se trata de un área de más de 38.000 metros cuadrados, que contiene 3.500 huellas de dinosaurio.

Su descubrimiento data de 1985, cuando Lluís Viladrich y su esposa, miembros del colectivo Berguedà de Ciencias Naturales, se encontraban de excursión en la zona y sospecharon que los hoyos que se observaban en Fumanya Sur podrían corresponder a huellas de algún animal.

Las investigaciones posteriores confirmaron que se trataba de huellas (icnitas) con 65 millones de años de antigüedad; y los paleontólogos identificaron también los restos de fósiles de huevos y de huesos de dinosaurio, un gran número de restos vegetales (troncos de árboles, hojas de diferentes tipos, algas…) y de animales (caparazones de moluscos e invertebrados fosilizados).

para ver la noticia completa clique aquí

http://www.lavanguardia.com/vida/20170306/42579437536/finalizados-trabajos-de-estabilizacion-del-yacimiento-de-icnitas-fumanya-sur.html

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OBRAS DE AMPLIACIÓN DEL PUERTO DE BILBAO – Barreras dinámicas de protección

Patricia Baena — Wed, 29 Mar 2017 09:36:18 +0000

INACCÉS GEOTÈCNICA VERTICAL, S.L. ha participado en las obras de ampliación del Puerto de Bilbao con la instalación de una barrera dinámica de protección antidesprendimientos.

La autoridad portuaria de Bilbao ha iniciado las obras de la primera fase del nuevo muelle, denominado el espigón central, y la estabilización de la antigua cantera de Punta Lucero.

El proyecto del espigón central esta considerado una obra estratégica para el puerto, tal y como calificó su presidente, Asier Atutxa, ya que permitirá sumar un espacio de 600.000 metros cuadrados, algo que está empezando a ser urgente porque el grado de ocupación de las instalaciones portuarias, antes de esta ampliación, está ya en el 80%.

En lo que se refiere a las obras de la estabilización de la antigua cantera de Punta Lucero, el proyecto viene motivado por «la situación de grave riesgo de inestabilidad» y salvaguardar «la seguridad de las personas y de los bienes situados al pie de la cantera», después de que en los últimos años se hayan producido diversos episodios puntuales de deslizamientos y desprendimientos de bloques rocosos, según los propios responsables del centro. Por este motivo el proyecto constructivo prevé la instalación de diversas barreras dinámicas antidesprendimientos.

INACCÉS GEOTÈCNICA VERTICAL, S.L., ha sido escogida por la UTE encargada de realizar la obra, para la instalación de las barreras dinámicas de protección contra los desprendimientos de bloques rocosos.

Concretamente se han instalado:

120 metros lineales de barrera dinámica de una capacidad de absorción de 1.000 Kj., de 6 metros de altura.
250 metros lineales de barrera dinámica de una capacidad de absorción de 3.000 Kj., también de 6 metros de altura.

Características de las barreras instaladas:

Barrera dinámica de protección contra caída de rocas RMC 300A de 3.000 Kj de absorción de energía, deformable, producida de acuerdo con Sistema de Calidad Certificado ISO 9001 y con ensayo de impacto dinámico a escala real, realizado por Laboratorio oficial de acuerdo con lo indicado en Dir 89/106/CEE, DPR 246/93 y Documento ETAG 027-2008 “Guideline for European Technical Approval of Falling Rock Protección Kit”, y en cumplimiento con su ETA (European Technical Approval), con Certificado EOTA, marcado CE; perteneciente a la clase 6 (seis) Categoría A con absorción de impactos superiores a 3.000 kJ.
Barrera dinámica de protección contra caída de rocas RMC 100A de 1.000 Kj de absorción de energía, deformable, producida de acuerdo con Sistema de Calidad Certificado ISO 9001 y con ensayo de impacto dinámico a escala real, realizado por Laboratorio oficial de acuerdo con lo indicado en Dir 89/106/CEE, DPR 246/93 y Documento ETAG 027-2008 “Guideline for European Technical Approval of Falling Rock Protección Kit”, y en cumplimiento con su ETA (European Technical Approval), con Certificado EOTA y marcado CE; perteneciente a la clase 3 (tres) Categoría A con absorción de impactos superiores a 1.000 kJ.

La protección contra la corrosión de las barreras ha sido de Clase A, debido al fuerte impacto del ambiente marino sobre las mismas, pues las barreras han sido instaladas a poca distancia del mar

Las barreras se han instalado en diferentes cotas de la Cantera Punta Lucero, hasta una altura aproximada de 90 metros sobre el muelle. Por este motivo ha sido necesaria la utilización de un helicóptero para el posicionamiento y colocación de las barreras.

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