Understanding ground stabilisation is becoming a larger trend in this modern day as it is slowly replacing older methods of ground stabilisation such as concrete piling and underpinning.
Often the ground on which our properties sits can become unstable or move. This can be caused by a wide variety of reasons. These can include underground stream or broken drains washing away the fines or soil leaving voids. It could be as a result of a long dry summer where the ground soils shrink and contract. Either way, it can lead to structural movement or building subsidence to the property above.
Building subsidence or building movement is a frequent problem. Often a structural engineer will propose that the building is monitored over a period of time to see if the building subsidence or building movement is ongoing or historic.
The building monitoring can be undertaken in a variety of way including tell-tales crack monitoring devices which are fixed to the wall in problematic areas. More commonly these days an electronic wall monitoring device is installed which sends the data remotely either by the internet or GSM. This gives a far more accurate way or monitoring building subsidence or building movement. The data can be recorded live or hourly readings taken and transmitted. This can help the structural engineers to fully understand what is happening to the property that is experiencing building subsidence or building monitoring.
Once a clear understanding has been established as to what and why the building subsidence or building movement is occurring, a remedial plan can be designed to prevent further movement. This may be to stabilise the ground under the property in the vicinity and may include underpinning or piling works as well.
Underpinning is where concrete is poured under the existing foundations to strengthen and the existing foundations and to ensure the property is sitting on firm ground.
Piling is where concrete piles are driven down until the firm substrate is reached and therefore provide stability.
Ground stabilisation schemes include pressure injecting polyurethane solvent free expanding resin into the ground, normally to a depth of between 3 – 5 metres where the resins will fill all the voids and stabilise the ground.
If you have any other questions about understanding ground stabilisation we’re more than happy to help. At Structural Repairs, we undertake all of the options and they are designed and overseen by our team of in-house Structural Engineers. Contact us to discuss your requirements in more detail.
You can also download our Ebook about Understanding Ground Stabilisation.