Homedynamic replacement
Release time：Apr 20,2023
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dynamic replacement
The dynamic compaction replacement method refers to the use of a heavy hammer to remove soft soil, backfill block stones, crushed stones, sand, or other granular materials into the compaction pit, and ultimately form a block (crushed stone) pier. The block (crushed stone) pier and the surrounding soil mixed with sand and gravel form a composite foundation, with a significant increase in bearing capacity and deformation modulus. The gaps in the block (crushed stone) pier provide a good channel for the discharge of pore water in the soft soil. The foundation treated by dynamic compaction replacement method not only improves the strength of the foundation, but also improves the drainage conditions, which is conducive to the consolidation of soft soil.
The dynamic compaction replacement method has a lot of successful experience in treating cohesive soil fills with high water content and muddy and muddy soil foundations with small thickness. It can overcome the limitations of not being too deep (usually 3m deep) for soil excavation and replacement, and not being too shallow (usually greater than 6m) for powder spraying piles, and has the characteristics of low cost and short construction period. Therefore, it is used to treat the shallow (less than 6m) soft foundation in the Alluvial plain of the Yellow River.
Dynamic compaction replacement is divided into:
① Single point ramming replacement forms an independent form of pier replacement body.
② The replacement of group points with sufficient spacing forms an orderly arrangement of group pier composite foundation.
③ Densely arranged group points are compacted to form a form of overall replacement. The depth of the replacement body for single point compaction is generally 5-7m, with the deepest being 8.5m; The depth of integral replacement generally does not exceed the depth of single point compaction replacement. The depth of squeezing replacement in mud is generally 6m, with a maximum depth of 10m (using special techniques).
