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Permanent GPS Stations - Monumentation - Deep Drilled Braced Monument
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Deep Drilled Braced Monument
The Deep Drilled Braced Monument provides for a high degree of stability and longevity and can be anchored in bedrock or unconsolidated material. It is in the form of a tripod, each leg extending into the ground up to about 40 feet and welded at the top with gusset reinforcements. If site access is an issue, the Short Drilled Braced Monument is the next best alternative to this type.
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Pros:
- high stability
- longevity
- can be installed in unconsolidated materials
Cons:
- labor and tool intensive (requires a driling rig and crew)
- expensive
- time intensive (requires 2-4 days)
- may not be able to install in some remote locations... depends upon ease of site access
- large construction disturbance footprint
Design and Construction
Technical Drawings in .pdf format:
Required Materials, Tools, Cost, etc.
A drilling contractor is required to install this monument. Please contact Unavco for further information.
The cost of installation can typically range between $6,000 and $10,000 depending upon factors such as the type of drilling rig used, distance the drill rig and crew need to travel to site (mobilization/de-mobilization), foundation material (ground) being drilled, etc.
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Last modified Tuesday, 25-Nov-2008 21:41:56 UTC
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