IGS has well-developed techniques and systems for installing both Casagrande-type open-standpipes and vibrating wire piezometers (VWPs).
This is “IGS everyday business”.
Various direct-push installation methods and sealing systems are used, depending on circumstances and conditions in the field.
Methods can be (and often are) tailored to suit a client’s preferences or instruments. We can install client supplied VWPs or supply VWPs to clients specifications. Our preferred VWP supplier is HMA Geotechnical.
We have developed a few methods to install vibrating wire piezometers:
As we are able to test the VWPs after placement within the fabricated adaptor, but prior to placement in the ground, we have a very high success rate in installation of VWPs by this direct push method compared with traditional drilled installation methods.
most common method used by IGS for installing Casagrande Standpipes is a
combination of “dummying” to make a hole, then direct-push-in of a galvanised
steel encased Casagrande tip, pushed in by galvanised steel water pipe connecting
a little more complicated, PVC-cased Casagrande tips can also be installed by
us, by insertion through our 55mm OD CPT casing tubes.
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