Dynamic compaction is a method that is used to increase the density of soils when certain subsurface constraints make other methods of soil compaction inappropriate. The process involves dropping a heavy weight repeatedly on the ground at regularly spaced points, usually laid out in a systematic fashion such as a grid. The weight and the height from which it is dropped determine the force delivered to the ground surface and thus the amount of compaction that occurs. Depending on the degree of compaction desired, the weight may vary between 8 and 36 tonnes (18,000 and 79,000 lb), and the height between 1 and 30 metres (3 and 98 ft).
The impact of the free fall creates stress waves that help in the densification of the soil. These stress waves can penetrate up to 10 metres (33 ft). In cohesionless soils, these waves create liquefaction that is followed by the compaction of the soil; in cohesive soils, they create an increased amount of pore water pressure that is followed by the compaction of the soil. Pore water pressure is the pressure of water that is trapped in the spaces between the solid particles of rocks and soils.
The degree of compaction depends on the weight of the hammer, the height from which the hammer is dropped, and the spacing of the locations at which the hammer is dropped. The initial weight dropping has the most impact, and penetrates up to a greater depth. The following drops, if spaced closer to one another, compact the shallower layers and the process is completed by compacting the soil at the surface.
Most soil types can be improved with dynamic compaction. Old fills and granular soils are most often treated. The soils that are below the water table have to be treated carefully to permit emission of the excess pore water pressure that is created when the weight is dropped onto the surface.
and 22 Related for: Dynamic compaction information
Dynamiccompaction is a method that is used to increase the density of soils when certain subsurface constraints make other methods of soil compaction...
include various soil compaction techniques such as vibro compaction (compaction of the soil by depth vibrators), dynamiccompaction, and vibro stone columns...
Techniques used to improve sabkha soils for construction purposes include dynamiccompaction. Badain Jaran Desert – Desert in China Chott el Hodna – Endorheic...
three basic steps: powder blending (or pulverisation), die compaction, and sintering. Compaction of the powder in the die is generally performed at room...
riprap. The soil or rock itself may be improved by means such as dynamiccompaction, injection of grout or concrete, and mechanically stabilized earth...
main sources of ground vibrations at construction are pile driving, dynamiccompaction, blasting, and operation of heavy construction equipment. These vibrations...
The essential requirement of memory management is to provide ways to dynamically allocate portions of memory to programs at their request, and free it...
In mathematics, a dynamical system is a system in which a function describes the time dependence of a point in an ambient space, such as in a parametric...
random compact set is essentially a compact set-valued random variable. Random compact sets are useful in the study of attractors for random dynamical systems...
Dynamic range (abbreviated DR, DNR, or DYR) is the ratio between the largest and smallest values that a certain quantity can assume. It is often used...
and beginning a new lactation. dry milling dryland farming dubbing dynamiccompaction A method of increasing the density of soil deposits by repeatedly...
Semantic compaction, (Minspeak), conceptually described as polysemic (multi-meaning) iconic encoding, is one of the three ways to represent language in...
Dynamic apnea is a discipline of competitive freediving, also known as competitive apnea. Dynamic apnea covers two of the eight competitive freediving...
In computer science, a dynamic array, growable array, resizable array, dynamic table, mutable array, or array list is a random access, variable-size list...
In time series analysis, dynamic time warping (DTW) is an algorithm for measuring similarity between two temporal sequences, which may vary in speed....
ground improvement of soft and sensitive soils (e.g. sand compaction piles, dynamiccompaction). Springman combines physical modelling in a geotechnical...
The Dynamic Force engines are a family of internal combustion engines developed by Toyota under the brand's Toyota New Global Architecture (TNGA) strategy...
was a sequence of test tones, called SDR (Super Dynamic Range, also called XDR, or eXtended Dynamic Range) soundburst tones, at the beginning and end...
size—during rehashing and to avoid memory fragmentation that triggers heap compaction due to deallocation of large memory blocks caused by the old hash table...
gravitationally hold the galaxies together in a bound group. Compact galaxy groups are also not dynamically stable over Hubble time, thus showing that galaxies...
Wang, Zhen (2022). "Do compact cities have higher efficiencies of agglomeration economies? A dynamic panel model with compactness indicators". Land Use...
Global Information