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| Project
Title |
A259 Road
Stabilization, Dymchurch |
| Client |
Highways Agency |
| Consultant |
Keller Design |
| Main Contractor |
Keller
Ground Engineering |
| Featured
Products |
Weldgrip Composite Self-Drilling
Nails |
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Erosion of the roadside embankment
alongside the A259 coast road at Dymchurch required a stabilization
project be undertaken to support and stabilize affected areas of the
embankment. The areas of erosion were in danger of extending into
the road carriageway. |
Reinforcement and consolidation was achieved using the
Weldgrip Gripforce® Composite Self-Drilling Nail System.
6m long x 31/15mm anchors were used to reinforce the
compacted ground underneath the road and to retain gabion mattresses.
The nails were installed using a rotary percussive drill mast. 4 x 1.5m
lengths were connected by couplers and utilized a 51mm sacrificial bit
and grout flushing. Non-metallic custom made endplates together with specially
designed Weldgrip stainless steel nuts were used for the nail head.
John Judge, Technical Manager of Keller Ground Engineering
commented on the project - “Weldgrip Gripforce® Self-Drilling
Nails were used because of their long term protection against corrosion
and the speed of installation of the nail system”. Their unique
formulation allow the nails to be installed with percussive drilling machines
through sands, gravels, clays and compacted soils. Modified Vinylester
and special glass used in the manufacturing process give excellent corrosion
resistance.
The lightweight anchor system has an engineered thread
and is complimented by a wide range of accessories, including 316 stainless
steel couplers and end fittings (UTS 215kN) together with a range of standard
and purpose designed drill bits, end plates and adaptors.
Self-Drilling Composite Soil Nails are a cost effective
alternative to cased holes in materials where hole collapse is possible.
The light weight and ease of handling in confined situations
alleviates the need for heavy plant and the restrictions associated with
double corrosion protected nails, whilst providing excellent long term
corrosion protection.
The use of Weldgrip Gripforce® products in marine
environments on projects such as the Dawlish Sea Cliff stabilisation,
Chatham Dock Wall repair, Whitehaven Harbour Wall reinforcement and Kingsand
Sea Defence Wall reinforcement offer a proven track record for the BBA
certified product.
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Weldgrip are also proud to have attained
BBA accreditation and ISO 9001 standards in recognition of our continuing
excellence in Geotechnical products and services. |
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