EASTSIDE CATCHMENTS GIBRALTAR, GI

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1 Steinschlagschutz EASTSIDE CATCHMENTS GIBRALTAR, GI

2 EASTSIDE CATCHMENTS GIBRALTAR Steinschlagschutz Projekt Projektnummer Strasse PLZ Ort Land/Region Eastside Catchments Gibraltar GI Sir Herbert Miles Road GX11 1AA Gibraltar Vereinigtes Königreich (UK) Installationsjahr 2017 Kunde Planer Ausführende Firma Government Of Gibraltar Golder Associates CAN Geotechnical Ltd. Ausgangslage Following rockfall in 2015 Golder Associates undertook a design for rockfall mitigation measures to protect the road and residential properties below. The detailed rockfall analysis showed a requirement for protection from a 5000 kj impact with a system height of 7 m. Massnahme In December 2016 CAN Geotechnical were awarded the project to complete phase 1 of the works, a 40 m long and 7 m high 5000 kj rockfall barrier. We supplied a RXE-5000 barrier. To enable future works to be completed more easily and without deconstructing the existing fence, we provided a solution for the end post to alllow for this. Over several years and many projects Geobrugg has worked with both Golders Associates and CAN Geotechncial and a good relationship has developed. This enabled all of the involved parties to work together to find a cost effective and buildable solution. The ground conditions on the eastside catchments are well known and extremly difficut to work within. To enable the works to be completed CAN Geotechnical had to carry out lots of temporary works and to use enlarged concrete bases for the fence posts. Additionally CAN Geotechnical opted to terminate all ground anchors into reinforced concrete bases with wire rope eyes protruding for connection to Geobrugg U-brakes. In Januray 2018 CAN returned to site to instal the remaining 48m of barrier. The customised solution installed on the previous section worked perfectly enabling a smooth instalation and transition between the two barriers. For this phase of works CAN built upon their knowledge of the ground conditions encountered last time and in conjunction with the designer were able to use a more conventional anchoring solution avoiding the need for the large concrete foundations beams and the temporary soil nailing required in the previous phase. This was no easy task however as it required drilling with a 115mm bit to install R51 Hollow bar, with the requirement to install permanent casing in the upper part to provide extra stability. Steinschlagschutz Eastside Catchments Gibraltar, GI 2/9

3 Geschützte Objekte Systeme Strasse, Touristische Infrastruktur, Wohngebiet, Infrastruktur RXE-5000 Korrosionsschutz Verzinkt, GEOBRUGG SUPERCOATING Energieaufnahmevermögen Systemhöhe Systemlänge 5000 kj 7.0 m 88 m Steinschlagschutz Eastside Catchments Gibraltar, GI 3/9

RXE-5000 rockfall barrier - 7 m high and 40 m long spectacular

View from up slope at the end of Phase 1 RXE-5000 separation post

4 RXE-5000 rockfall barrier - 7 m high and 40 m long spectacular structure. View from up slope after completion of phase 1 RXE-5000 rockfall barrier - 7 m high and 40 m long installation process. View from up slope at the end of Phase 1 RXE-5000 separation post to connect the next phase of the project: visible transmission ropes and U-brake elements Steinschlagschutz Eastside Catchments Gibraltar, GI 4/9

CAN Geotechnical IRATA (Industrial Rope Access Trade Association) operatives

shackles RXE-5000 rockfall barrier ring net panels being disconnected from

5 CAN Geotechnical IRATA (Industrial Rope Access Trade Association) operatives pulling the ringnet panels to meet ready for connecting together with shackles RXE-5000 rockfall barrier ring net panels being disconnected from the posts and banding being cut off ring nets Post and mesh panels were lifted into position by crane. Visible the old small and insufficient barriers being replaced by the RXE-5000 Steinschlagschutz Eastside Catchments Gibraltar, GI 5/9

RXE-5000 rockfall barrier border post tensioning of the top support ropes to

Visible scale of rockfall danger behind the barrier Another view of the

barrier post base showing running wheel attached and one running wheel loose

6 RXE-5000 rockfall barrier border post tensioning of the top support ropes to the anchor blocks. Visible scale of rockfall danger behind the barrier Another view of the RXE-5000 rockfall barrier installation during phase 1 RXE-5000 rockfall barrier post base showing running wheel attached and one running wheel loose for connection. This unique technology protects ropes and allows their almost frictionless movement Steinschlagschutz Eastside Catchments Gibraltar, GI 6/9

7 View of the completed RXE-5000 rockfall barrier after completion of phase 2 Ring nets and ropes on the RXE Visible secondary mesh behind ring net End post of the RXE-5000 Steinschlagschutz Eastside Catchments Gibraltar, GI 7/9

8 Lateral anchors, note the special casing around the top of the bar. View of the completed RXE-5000 at the end of phase 2 View of the completed RXE-5000 at the end of phase 2 Steinschlagschutz Eastside Catchments Gibraltar, GI 8/9

Für Fragen steht Ihnen unser Geobrugg Spezialist gerne zur Seite Alexander Bittendorfer Project Manager Germany South Tel. +41 71 466 84 29 Mobil +41 78 601 06 14 Alexander.

9 Für Fragen steht Ihnen unser Geobrugg Spezialist gerne zur Seite Alexander Bittendorfer Project Manager Germany South Tel Mobil Geobrugg A company of the BRUGG Group Certified to ISO 9001 Steinschlagschutz Eastside Catchments Gibraltar, GI 9/9

Debris Flow & Shallow Landslide Protection

Debris Flow & Shallow Landslide Protection REST AND BE THANKFUL - A83 RABT, GB REST AND BE THANKFUL - A83 RABT Debris Flow & Shallow Landslide Protection Project Street Place Country/Region Rest and Be