In the event of subsidence of the ground under the foundation of a house, it is possible to intervene with injections of expanding resins to avoid damage to the structure.
Foundation subsidence and foundation consolidation techniques
In recent years the problem of crack formation in buildings, due to the land subsidencehas been spreading also due to climate change. In fact, thetemperature risedrought, are among the main causes of the appearance of cracks in walls.
This situation usually occurs when the ground beneath the house subsides, because the balance between the ground and the foundation, which guarantees stability and safety over time, has changed.
I foundation subsidence occur due to aalteration of the state of tension in the underlying ground or even for a variation in interstitial pressures due for example to a lowering of the water table, for this reason it is important to know how to consolidate a soil, one of the most used methods is the one that uses expanding resin injections into the subsoil or foundation.
To estimate the subsidence of the foundations of a house or of the foundations of a multi-storey building, it is advisable to check up to what depth the alteration of the tension in the ground becomes negligible, by analysing the stratigraphic conditionsthe initial and final stress state, the stresses and deformations present in the soil over time.
Consolidation with expanding resin injections
The latter consists of three parts: a solida liquid it’s a fizzy. Over time, one of these parts can undergo an anomalous variation due to natural or mechanical causes and therefore the balance between the ground and the foundation can be broken.
For example, long periods of drought alternating with heavy rainfall or large sewage leaks alter the structure of the soil and can lead to subsidence.
And clayey soil It is able to absorb large quantities of water, increasing in volume; in a very hot summer, the water evaporates leading to a subsequent decrease in the volume of the soil with consequent formation of interstitial voids.
If he ground And sandy or gravellythe water circulates freely inside it, displacing the finest solid particles, leaving cavities.
Even in this case, you can have structural failures.
Other possible causes of collapses are the consequence of a heavy trafficexcavation work nearby, growth of roots of tall trees or other disturbances of the foundation soil.
Clay soil consolidation technology and building foundation consolidation with expanding resin injections
The presence of water and climate change are therefore among the causes of possible alterations to the static equilibrium of the ground and consequently of the compromise of the stability of the foundation.
The firm GEOSEC® ITALIA is able to eliminate these failures thanks to theInjection of expanding resins which consolidate the ground.
The intervention system SEE&SHOOT® It is based on the use of the latest generation of high-tech three-dimensional diagnostics, integrated with the mechanical penetrometric test to reconstruct the geological model of the ground under the house, before, during and at the end of the injections.
Sending electric current in the ground by means of small transmitters, its passage in the subsoil is measured. Geosec specialized geologists are able to interpret and correlate all the collected data in the best possible way, case by case.
With the Tomografia ERT 4D LIVE thousands of resistivity measurements are taken for each injection and in this way it will be possible to identify, before the injections, those porous, humid and wet volumes of soil, which are often a contributing cause of subsidence.
You will also be able to learn about sewer leaks e stagnant watersoil washouts and underground cavities. The measurement of the mechanical resistance of the soil will then be obtained with a penetrometric testwhich will be performed in the most significant points indicated by the ERT 4D LIVE Tomography.
By superimposing all this information, it will be possible to reconstruct the geological model of the terrain under one’s own home.
This will make it possible to define in detail the injection project and subsequently, always keeping the monitoring system running, verify the results and improvements obtained thanks to the injections.
Improvements obtained thanks to the injections of expanding resin
Following the reconstruction of the three-dimensional geological model of the terrain, thetargeted consolidation intervention with the injections of expanding resins it produces the following improvements:
- reduction and water removal interstitial from the ground;
- filling of the voids;
- compaction of the land.
Foundation consolidation with expanding resin injections – Geosec
The basis of this technology is the MAXIMA resin®produced in exclusive for GEOSEC®with components eco-friendly and certified.
The University of Parma tested resin samples, verifying their mechanical characteristics and dimensional stability over time.
The Giordano Institute has verified its perfect environmental compatibility. Each production batch is subjected to rigorous quality control by a specialized external laboratory.
The MAXIMA resin® it’s at slow expansionwhich permeates well into the voids under the house, acting delicately only where needed. The monitoring system can easily detect the expansion of the resin in the ground, thus allowing targeted injection, with maximum effectiveness and without waste.
How does the GEOSEC building consolidation intervention take place?® Italia
A team specialized in the intervention See & Shoot by Geosec, operates throughout the country, equipped for any operational context: narrow spaces, underground rooms, are not a problem.
A man arrives on the scene mobile laboratory for injections, inside which various instruments are installed:
- l’injection systemmanaged by a computerized system capable of controlling various working parameters;
- l’diagnostic system monitoring, to reconstruct the geological model of the terrain.
Consolidation of foundations and ground with expanding resins – Geosec
Once the project has been defined, we move on to thedrilling holes through the foundationto allow the resin to penetrate where it is needed.
These are small holes made manually with drills and thin tips of half an inch in diameter, really minimally invasiveThe holes will be directed precisely towards those volumes of soil that have been found to be the cause of the subsidence.
L’resin injection It will happen cyclically, with short breaks in between, so as to gently consolidate the soil.
Once through the foundation, the resin exits the injection tube, spreading into the cavities of the ground at the desired depth. During the injections the geologist constantly checks, through ERT 4D LIVE Tomography, the effects obtained until the planned improvements are achieved.
The intervention takes place without excavating. Once the operation is completed, the Geosec team permanently seals the holes.
Experience, professionalism, are the foundation of a concrete result.
End of Article
THE EDITORIAL TEAM RECOMMENDS
As further proof of the high reliability of Geosec, after having already obtained prestigious certifications and technical qualifications in Italy and abroad, the opportunity of a post-contract insurance guarantee on the consolidation interventions of land and buildings is added, which therefore become protected by a double posthumous guarantee:
- GEOSEC Contractual Guarantee® lasting 10 years
- 10-year post-consumer insurance guarantee
Source: www.lavorincasa.it
