Sink holes are commonly formed by water erosion of porous ground, such as limestone. Continued erosion by water eventually leads to the collapse of below ground caverns and voids which in turn causes visible distortion at surface level. The below ground collapse of the limestone can cause spectacular damage to buildings and land at surface level.
Below ground voids and caverns are identified by a combination of dynamic probing and if necessary ground radar.
Shire carry out high pressure injection of lightweight grouts deep into the substrata.
The grout injection pressures are monitored at surface level to ensure we fully fill below surface voids.
Once treatment is complete the ground is again tested using dynamic probes to establish the success of the treatment.