| As the
construction contractor, your contract calls for installing 100
caissons, 8 ft diameter by 125 ft long, and the acceptance criteria
require proof that no flaws are present. As the design engineer for
the rehabilitation of a 100-year old bridge with no existing plans,
you must know the length and condition of the piles. As the attorney
for the Owner of a tunnel in which the tunnel boring contractor has
filed a claim for changed conditions, you need expert advice on the
subsurface conditions where the tunnel boring machine failed. All of
these real-life scenarios call for NDT, and each requires a
different method. Of course, there are many different methods, and
they all have in common the capability to test material without
destroying it. Why
Hager-Richter?
Education, Experience, and Equipment.
Hager-Richter has all three. Most
of our people have MS or Ph.D degrees in physics, geology, and/or
geophysics. Hager-Richter has
performed NDT for many projects, ranging from the determination of
rock quality along 7000 ft of tunnel in hard rock to the thickness
of a 90-year old bridge abutment.
Survey methods and applications
include:
|
Pile Integrity Testing |
| General Applications:
|
Specific Applications:
- test for flaws
- locate flaws
- determine size of flaws
|
|
Seismic Methods |
| General Applications:
|
Specific Applications:
- determine length of piles
- determine depth of foundations
|
|
Ground Penetrating Radar (GPR) |
General Applications:
- bridges
- buildings
- construction
|
Specific Applications:
- detect voids, delaminations, and rebar
- determine thickness of concrete
- detect piles and footings
|
|
 |
Mapping rebar in a structural concrete slab
using a 1000 MHz GPR antenna. |
|
Ultrasonics |
| General Applications:
|
Specific Applications:
- detect voids, delaminations, and rebar
- determine thickness of concrete
- detect piles and footings
|
|
Pulse Echo Impact |
| General Applications:
|
Specific Applications:
- detect voids, delaminations, and rebar
- determine thickness of concrete
- detect piles and footings
|
|
