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Services
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Geophysics and Pile Testing
Geophysics - Surface
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Fugro Engineering Services Ltd offer a wide selection of geophysical techniques that involve
the measurement and interpretation of physical properties of the earth in order to be able to
determine subsurface conditions for engineering, geotechnical and environmental investigations.
Applications of these techniques are numerous and can be applied on scales ranging from geological variations through to structural investigations within buildings. The use of Geophysical techniques offer the following advantages:
- Non-intrusive - minimises exposure of site personnel and the introduction of new pathways in the investigation of contaminated land.
- Non-destructive - can investigate built structures without effecting their integrity.
- Rapid - large areas can be covered in a relatively small amount of time.
- Continuous - samples can be recorded across an entire site rather than just point locations.
- Cost effective - can be used as a reconnaissance tool to target sampling rather than approaching a site 'blind'.
We have many years experience and expertise in the acquisition, processing and interpretation of a wide variety of geophysical techniques, including Ground Probing Radar, Magnetic Surveying, Electromagnetic Methods, Resistivity Surveying, Seismic Reflection and Refraction techniques, and Gravity and Microgravity Surveys.
Geophysical techniques can be applied to a wide variety of situations. Some of the more day-to-day applications Fugro Engineering Services Ltd utilise include:
- Geological and geotechnical investigations
- Groundwater / hydrogeological surveys
- Structural Investigations
- Utility and subsurface obstruction mapping
- Environmental site investigations
- Detection of former mineworkings
- Railway industry surveys
- Pipeline planning surveys
- Solution feature mapping
- High speed pavement analysis
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Geophysics - Borehole
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Fugro Engineering Services Ltd offer a wide selection of borehole geophysical techniques that involve the measurement and
interpretation of physical properties of the earth in order to be able to determine subsurface conditions for engineering,
geotechnical and environmental investigations. These borehole tools are lowered down drilled holes
before completing (closing) the hole.
Available tools:
- Resistivity and induction sondes
- Fluid resistivity (conductivity) logging
- Temperature logging for identifying groundwater flow
- Borehole flowmeter for identifying vertical flow
- Acoustic borehole images to identify fissures and fractures in soil and rock
- Gamma logging for lithology detail and detection of radioactive contaminants
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Pile Testing
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Fugro provides a complete range of site pile testing and pile condition reporting
services to the construction industry. These services include Pile Integrity Testing (PIT);
Dynamic Pile Testing (DPT); Cross Hole Sonic Logging; pile length measuring and consultancy on
the capacity and serviceability of piles. We use the latest site testing equipment and analysis
software to provide a fast, efficient and cost effective service
Pile Integrity Testing (PIT)
Defects in concrete piles caused either during or after construction may seriously
affect their performance in service. Load testing of piles may be used to check the
assumptions adopted in the load capacity design of the piles. However, it is too expensive
and time consuming to use load testing as a means of checking workmanship.
Modern non-destructive methods based on small strain impulse techniques enable the integrity
of all the piles on a site to be established rapidly and economically to enhance greatly
confidence in the foundation. The test is performed using a portable, battery powered unit
which requires no backup vehicle or vulnerable cables across site that disrupt normal
construction activity. The test equipment is based upon the most modern digital data acquisition
and signal processing techniques currently available, thus maximising the resolution and
effectiveness of the test system. In excess of two hundred piles per day may be tested with
this unit, depending on access and pile head condition.
Dynamic Pile Testing (DPT)
Dynamic load testing is a cost effective alternative to conventional static load testing for
a wide variety of pile types and sites. Instead of costly proof-loading with kentledge or
anchor piles, the technique uses a heavy falling weight such as a piling hammer to impart
a short duration impact to the pile head, whilst monitoring the pile response using temporarily
attached transducers. The pile response to dynamic loading may be used to provide the
foundation designer with an interpreted pile capacity, and can usually provide additional
information that is difficult to obtain via static load testing.
Cross Hole Sonic Logging (CHSL)
The CROSS-HOLE SONIC LOGGER is used to detect defects in concrete structures and in other solid
structures such as rock or concrete-rock interfaces. Defects that may be detected using sonic
logging include: honeycombing; segregation due to improper concrete placement methods; washout of
cement due to groundwater flow; cracks in pile shafts due to shrinkage; inclusion of foreign
material causing contamination of concrete; necking and arching of piles due to collapse of side
walls during withdrawal of temporary liners.
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Technical Contact |
E-mail |
Tel |
| Satar Hasan |
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0870 402 1449 |
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