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Soilfrac® is a process used to control or reverse the settlement of structures. It consists of the injection of material into the soil between the foundation to be controlled and the process causing the settlement. The material injected is forced into fractures thereby causing an expansion to take place counteracting the settlement that occurs or producing a controlled heave of the foundation.
Because the process requires that the soil is fractured and not permeated, Soilfrac® may be used in most soil types ranging from gravels to clays or weak rocks.
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Compaction grouting is suitable for wet to saturated sand, silt and clay. It consists of pressure grouting the ground with a high viscosity mortar in a pattern designed to suit the specific features of the site.
It is a proven, economical and versatile technology whose benefits include reducing the risk of liquefaction during an earthquake. It can be used to improve the foundations of existing structures.
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The grouting technique is used to improve soils and certain man-made structures (masonry, concrete, etc.)
-Filling of natural cavities (karsts, dissolution voids, etc.)
-Filling of man-made cavities (especially underground quarries)
-Re-compacting of accidentally decompressed soils (water leakage, nearby excavations)
-Filling of soil fissures to prevent water flow (cut-off curtain wall under a dam, containment cut-off wall around excavations or a shaft, etc.)
-Permeation of sands and gravels using a liquid product which sets after
injection
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The technology of injection to consolidate and re-compress soil, known in the technical literature as compaction grouting, is a solution aimed at compacting and amassing soft or altered, decompressed soil.
This technology was developed and used mainly to resist settling of structures and buildings; today compaction grouting is a valid solution for application in situations such as:
- stabilizing, consolidating and recovery of existing foundations, structures and buildings
- consolidating soil characterized by poor load-bearing capacity
- filling in cavities or blockage of soil that is particularly “open” or porous.
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