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Wookey Hole Catch Net 2015 - Geobrugg Wookey Hole Catch Net 2015 - Geobrugg
Wookey Hole Catch Net 2015 - Geobrugg Wookey Hole Catch Net 2015 - Geobrugg
Wookey Hole Catch Net 2015 - Geobrugg Wookey Hole Catch Net 2015 - Geobrugg
Wookey Hole Catch Net 2015 - Geobrugg Wookey Hole Catch Net 2015 - Geobrugg
Wookey Hole Catch Net 2015 - Geobrugg Wookey Hole Catch Net 2015 - Geobrugg

Wookey Hole Catch Net

   Compartilhar
Lugar
Wookey Hole Caves, Somerest
País / Região
Reino Unido
Ano de instalação
2015
Cliente
Wookey Hole Caves
Engenharia
Frederick Sherrell Ltd Consulting Engineers
Sistemas
ROCCO®
Absorção de energia máxima
500 kJ
Altura do sistema
3.0 m, 7.0 m
Comprimento do sistema
6 m - 15 m
Situação inicial

Frederick Sherrell Ltd Consulting Engineers approached us to ask, “is it possible to create a horizontal catch net to catch and hold a potentially unstable 10 ton boulder?” The client is Wookey Hole Show caves, they were planning to bore a tunnel from an existing cave to a cave that previously was only accessible to divers. There was a small risk that the vibration from the works could dislodge a 10 ton block in the roof of the currently accessible cave.

To carry out the works all tools, equipment, anchors and all components of the catch net had to be carried into the cave system by hand. A specialty rope access contractor with extensive experience in caves was engaged to assist with installation of the upper and lower access ropes. They first had install bolts for the rope access, before installing the anchors and the catch net. The anchors had to be drilled and installed using hand held equipment so the anchors had to be short enough for easy handling. To add to the complication of using short anchors the bedrock in the cave is a Dolomitic Conglomerate with a mean strength of only 35-40MN/m2. Following pull out tests we discovered that we would be required to design for a max load of 40kN per anchor.

Descrição

Geobrugg engineers designed a solution using our ROCCO 12/3/350 ring net to catch the block. Given the requirement to hand-carry and manually winch the net to the roof, we customized the ring net panels to allow for easy maneuverability and easy installation based on the location of the ropes. To take load from any impact Geobrugg installed five transmission ropes across the width of the cave. Geobrugg installed a U300 brake at each end of the ropes. Perimeter ropes were installed to give shape to the net.

Collaborating with the designers at Frederick Sherrell we designed a novel solution for installing suitably safe anchors given the weakness of the rock. In total 14 sets of anchors were installed. The anchors were paired together using wire rope. Two pairs were then attached to the U300 brake at each anchor point.

Upon project completion the contractor commented that the system drawings were clear, Geobrugg's engineer was accessible if there were questions, and the installation was extremely straightforward and far less complicated and time consuming than he had expected. He was impressed with this level of service and drawings that were provided for a custom designed product.

O seu contacto local

Kevin H. Coyle
Kevin H. Coyle
Regional Manager Northeast
Riscos naturais
Geobrugg North America, LLC
3 Beaudet Terr
Columbia CT 06237 / Estados Unidos
Telefone +1 860 377 3230

Formulário de contacto

Saleh Feidi
Saleh Feidi
Regional Manager California
Riscos naturais
Geobrugg North America, LLC
8921 Emperor Ave.
San Gabriel, California 91775 / Estados Unidos
Telefone +1 909 706 8964

Formulário de contacto

John Kalejta
John Kalejta
Regional Manager Central US
Riscos naturais
Geobrugg North America, LLC
3215 67th Avenue Pl
Greeley CO 80634 / Estados Unidos
Telefone +1 505 220 1404

Formulário de contacto

Bob Lyne
Bob Lyne
Regional Manager Southeast
Riscos naturais
Geobrugg North America, LLC
8004 Windspray Drive
Summerfield NC 27358 / Estados Unidos
Telefone +1 336 337 0945

Formulário de contacto

Pierce Runnels, Civil Engineer
Pierce Runnels, Civil Engineer
General Manager Geobrugg North America
Riscos naturais
Geobrugg North America, LLC
22 Centro Algodones
Telefone +1 505 771 4080
Telemóvel +1 505 400 0796

Formulário de contacto

Tim Shevlin
Tim Shevlin
Sales Director
Riscos naturais
Geobrugg North America, LLC
4676 Commercial St. SE, PMB 174
Salem OR 97302 / Estados Unidos
Telefone +1 503 423 7258

Formulário de contacto