What is MDM - description
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MDM-Modified Mixing/Modified Dry Metod
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is a patented deep foundation sysytem that combines the injection of water and binder at opportune times during the process. MDM can be applied in a wide variety of soils, from saturated clays to dry sand.
MDM is competitive and suitable for:
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- Driven pile alternative and/or soil improvement.
- Stabilization and solidification.
- Shallow cut-off walls.
- Retaining structures.
- Up-lift applications (with reinforcements).
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MDM in conjunction with shallow stabilization, has great potential as foundation systems for industrial buildings, road and rail road embankments, multistory building foundations and levee improvement/foundation.
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The MDM process
The following is a general description of the MDM process. Water and some binder is added in correct amounts during penetration and the balance of the binder is added during withdrawal. In some cases water may also be added during withdrawal.
The MDM process is distinguished by its independent and timely control of water and of binder that are separately and independently added directly to the soil at various depths in the region where the in-situ piling is to be formed. The amount of water in addition to the water that is already present in the soil at these depths is sufficient to form a stoichiometric mixture with the binder at the respective depths.
Independent control of the water and binder supplies, when it is to be injected and at wich rates, is the heart of the MDM process and of its patent claims. There are additional features, such as control of air, consistency of the mix, configuration of the piling, and operation protocols and control software.
The amounts of binder and water added depends on the soil conditions and the desired results.
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