A proper geotech report of the land, to see if rock was below the surface and how far down, was needed to determine this.
The geotech hand drilled 4 meters down and found there was no rock. After the land was excavated down to the correct level we started drilling 4.5 metre pile holes and struck rock at roughly 2 meters.
The reason for this is because the project manager had the geotech do a cheap report to try and save money.
To fix the problem we had to get the geotech back with an engineer to evaluate how far we had to drill into the rock. The geotech wrote out a new report and the engineer provided a certificate to clarify what had happened and what needed to be done to fix it. This ended up costing the project manager more money and set the job back by numerous weeks.
An example of a geotech report - Geotech report example
Good Brad, can you find references for what a geotech report looks like? Foundations and excavations are a part of construction with alot of unknowns. Sometimes you may come accross things that are totally unforseen, even with the best reports. Check out the property file example in moodle on topic 2
-Campbell
Posted by: Campbell | 03/16/2010 at 01:41 PM
Good attachment of a document. It would be a big call to put a fixed cost on excavation work. -Campbell
Posted by: Campbell | 05/09/2010 at 04:33 PM