What is the mechanical strength of a slurry wall?
The slurry wall has virtually no mechanical strength. Therefore it cannot be used as a retaining wall. Slurry wall can be subject to erosion, so it cannot withstand large hydraulic gradients.
Is the binder injected always in liquid form?
The binder is not always injected in liquid form. It is also possible to inject the binder either as a liquid slurry or as a dry powder. The liquid slurry is injected by means of a pump. We talk about wet technique. The dry powder is injected into the ground by means of compressed [...]
For large surface areas requiring treatment; what method should I use?
A wide variety of tools are available to choose from, depending on the application. For this type of application, you could for example use cutting tools to rapidly build wall or cell systems.
How continuity is ensured with bi-modulus columns?
We can ensure continuity of the bi-modulus column at the interface. We carry out two main types of tests during the project, loading and stripping. That way we ensure the quality and quantity of the interface through visual inspection.
Can use rapid impact compaction near an adjacent site?
It is possible to compact the ground near an adjacent site with rapid impact compaction. Rapid impact compaction suits to ground improvement in small spaces. As an example, we can apply this technique within or next to existing warehouses. In such cases, we monitor very carefully vibrations in adjacent structures during rapid impact compaction. [...]
What settlement is to be expected during works?
The initial trial area defines the value precisely. However, as a general rule, vibrocompaction of fill placed hydraulically generates settlement amounting to 7 to 10% of the height of the soil treated.
Is dynamic compaction cost effective for small worksites?
For an urban or a small worksite, a Rapid Impact Compaction system ca nbe cost effective. The Rapid Impact Compaction technique allow us to compact the soil using the same technique as conventional dynamic compaction. The difference is that depths of treatment generally limited to about 5 to 6 meters.
Can we use dynamic compaction close to structures?
There are structures 20 meters from your worksite; can we use dynamic compaction? We systematically monitor the vibrations generated on neighbouring structures throughout the project. If need be, we take preventive steps uch as reducing the height of release, installing vibration mitigation trenches. We sharply reduce the vibrations transmitted to neighbouring structures, even at [...]
Are stone columns compatible with organic materials?
As a rule, stone columns shouldn't be installed to address geotechnical issues related to load-bearing capacity and settlement. Lack of lateral confinement and the risk of creep od not make them suitable in that case. However, we can consider stone columns when the project is designed to provide drainage or slope stability. [...]
Does dynamic replacement require to pre-excavate pilars?
Pre-excavating pilars is not necessary to carry out dynamic replacement. The initial pounding of the platform is generally sufficient to form the crater that initiates the dynamic replacement pilars. After filling this crater, pounding drives the “compacted plug” into the soil, which then serves as the basis for the formation of the rest of the pilar. [...]