With the improvement of shrinkage modulus and the decrease of shrinkage. Due to different soil types, the mechanism of dynamic consolidation is also different. So what is the work that needs to be done in the process of dynamic compaction foundation treatment?
Preparation and inspection before dynamic compaction construction
Due to the rapid development of construction projects in China, in recent years, due to the shortage of land resources, there have been a large number of beach, hillside and valley backfilling projects. In order to save resources and reduce pollution, most companies will choose dynamic compaction construction for foundation treatment, while other foundation treatment methods are economical and can be widely used in projects. Generally, the bearing capacity of the foundation after foundation treatment is required to be between 180kpa~200kpa. Combined with my dynamic compaction engineering practice, this paper briefly discusses the problems that should be paid attention to or controlled in the Dynamic Compaction Engineering under the condition of foundation treatment.
1. The soil layer of the dynamic compaction ground is stable, and the application field of the dynamic compaction method of backfill requires natural stack preloading. When the natural preloading pile is loaded, in short, the dynamic compaction and dynamic compaction replacement are carried out before to achieve natural soil consolidation or preloading consolidation, etc.
2. Site conditions before large-scale construction: the site should be leveled before construction. If there is a huge isolated stone on the surface of the site, clean it first, and dynamically compact it. There are many granite boulders on the surface of the site, which makes engineers and technicians feel headache. After compaction, it was decided to clean the ground stones and level the site.
3. Whether there is groundwater under the surface: when there is groundwater under the surface of the dynamic compaction site, drainage measures need to be taken during the dynamic compaction process, such as digging sump, drainage ditch, etc; In the process of dynamic compaction, if the groundwater is not excluded, the void water in the soil will not be squeezed out. The soil porosity is very high and the soil density is very poor. The site after dynamic compaction will not meet the design requirements.
The dynamic compaction machine rental manufacturer reminds you that with the increase of soil density, the shear strength of soil increases and the shrinkage decreases. Therefore, the dynamic compaction method is used to reinforce the multi pores. Coarse particles. The essence of unsaturated soil is energy intensive. For saturated fine-grained soil, the treatment mechanism of dynamic compaction foundation is energy consolidation.
When huge impact energy is applied to the soil, a large stress wave will be generated, and the volume of microbubbles in the soil will accumulate and shrink, thus shrinking the soil volume. After the accumulation and contraction of soil volume, the pore water pressure will increase to the upper pressure value, and the soil will be liquefied (partially liquefied), and then the soil structure will be destroyed, and the soil will produce many cracks.
In the treatment of dynamic compaction foundation, it is important to densify the soil. Soil has three phases. In the process of reinforcement, attention should be paid to the moisture content of the soil. When the soil reaches its moisture content, it is necessary to maintain the moisture content of the soil. Come to our website for more relevant content http://www.sddhfjx.cn Consult.