Heavy hammer compaction is a kind of dynamic compaction, which is basically the same, and the compaction energy is different; The ramming energy of heavy hammer is lower than that of dynamic ramming; At 1000KN M boundary. The tamping energy is not an order of magnitude, so the reinforcement mechanism is different. Heavy hammer compaction is the reinforcement of shallow soil, which belongs to the compaction mechanism; The dynamic compaction method is the reinforcement of deep soil, mainly the mechanism of dynamic consolidation and dynamic compaction.
1. Heavy hammer compaction method
This method is to lift the rammer weighing about 15 ~ 30KN to a height of more than 4m, make it decouple and fall freely, and repeatedly compact the foundation to achieve the reinforcement effect.
This method is applicable to the consolidation of cohesive soil, sandy soil, miscellaneous fill and other foundations with the groundwater level lower than the heavy hammer compaction method, and is not applicable to saturated soft clay or cohesive soil below the groundwater level.
During construction, special attention shall be paid to the change of soil moisture content.
2. Dynamic compaction method
This method is to use a particularly heavy rammer (100 ~ 300KN) to fall freely from a height (6 ~ 40m) to tamp the foundation, so as to achieve the effect of deep reinforcement. Its influence depth can reach more than 10m. The huge impact force produces great shock wave and dynamic stress in the foundation, causing the compression and vibration density of the foundation soil, so as to improve the strength of the foundation soil and reduce its compressibility, It can also make the foundation soil resist vibration liquefaction and solve the collapsibility of collapsible loess. The bearing capacity of the foundation treated by dynamic compaction method can be improved and the compressibility can be reduced.
It is generally used to treat loose gravelly soil, miscellaneous fill, sandy soil, low saturation silt, clay and collapsible loess; It should be used carefully on fine-grained soil foundation with high saturation.
The wonderful content of this article is provided by dynamic compaction machine leasing. There are many wonderful contents on this website. You can click to enter: http://www.sddhfjx.cn We have special customer service to answer your questions