As a patented technology, DDC pile foundation treatment technology has been widely used in a large number of projects in various complex sites, which proves its wide applicability and technical reliability and has achieved convincing and very good results.
1, which has a wide application range and can be used for various foundation treatment;
In the foundation treatment project, compared with other technologies, the deep dynamic compaction technology in the hole can be applied to the foundation reinforcement of various messy strata, which has wide applicability. For example, it is used to treat thick loess, miscellaneous fill, liquefied soil foundation, all kinds of fragile soil, collapsible soil and foundation corroded by acid, alkali and salt, uneven foundation with hard interlayer, stone and waste backfill garbage foundation, underground civil air defense works, etc. Drilling and powerful punching are used to form the hole. As long as the foundation of the pile hole can be formed, this method can be used for reinforcement regardless of whether there is groundwater in the hole. In a word, the deep dynamic compaction method in the hole can not only eliminate the collapsibility and liquefaction of foundation soil, but also has the characteristics of bearing piles and composite foundation with uniform stiffness. Not only the bearing capacity is high, but also the shrinkage deformation is small.
2, the material specification is low, adjust measures to local conditions;
One of the biggest characteristics of this skill is that it can adapt to local conditions. However, inorganic solid data can be used, such as soil, sand, stones, broken bricks, concrete blocks, industrial wastes and their mixtures. Moreover, the material does not need strict processing, and all inorganic solid materials that can be filled into the holes can be used. Materials do not need long-distance transportation.
3. High kinetic energy, high pressure and strong compaction effect;
The important feature of this skill is that the pile hammer rammed into the hole is usually 100 kn- 180 kn, which can be larger according to the demand. Under the action of continuous punching and crushing, the filler in the hole is constantly subjected to high kinetic energy, high pressure and splitting compaction. The tamping energy E can reach 2000 kN m/㎡-3000 kN m/㎡ or higher, which is 5-8 times of the usual tamping energy and can be increased or decreased according to the engineering design requirements.