In recent years, the domestic dynamic compaction equipment skills have developed rapidly and are used more widely. Its key skills should focus on the research of high-energy dynamic compaction equipment skills and the research of dynamic compaction skills of full soft soil composite foundation. However, the common quality problems of dynamic compaction foundation treatment engineering cannot be ignored, such as uncompacted compaction, compaction into rubber soil, and adverse effects on nearby buildings.
In civil engineering, there are several reasons for the shortcomings of dynamic compaction foundation treatment engineering: tamping into rubber soil. Backfill on undisturbed soil such as clay, silty clay, humus soil and peat soil with high water content, or use these soil materials as backfill. When it is rammed, its surface forms a hard shell, and the water in the soil is not easy to soak and emit, so it forms soft plastic rubber soil.
The falling hammer of dynamic compaction equipment is unstable, and the pit wall collapses; The layer thickness is too large, or the tamping energy is not enough, and the useful influence depth is not reached. Have a bad influence on nearby buildings. Due to strong oscillation caused by dynamic compaction, the adverse impact on surrounding buildings was not fully considered before construction.
When the defects of dynamic compaction equipment foundation treatment project occur, the following methods can be selected for treatment. When tamping the fill, the water content of the fill should be controlled to prevent tamping on the undisturbed soil and backfill with excessive water content; When there is water on the surface, a drainage ditch should be set. If there is groundwater, it should be dewatered to the base. Dry soil, lime powder and other water absorption materials can be evenly mixed into the soil to reduce the water content, or the rubber soil can be scarified, dried in the sun, air dried to a better water content scale, and then compacted.
The dynamic compaction machine rental manufacturer suggests that the compaction should be carried out according to the rules and procedures. The drop hammer shall be stable according to the rules, and the tamping position shall be accurate. Before the construction of dynamic compaction equipment, the influence scale of surrounding buildings and dynamic compaction foundation construction should be fully considered, and corresponding measures should be taken, such as digging isolation ditches, or using other plans.
The above is all about the problems and precautions introduced to you today. I hope it can help you. If you want to know more, you can contact us by phone or follow our website http://www.sddhfjx.cn , our staff will contact you in time.