Every detail of lease and construction of dynamic rammer needs to be mastered. It is always a difficult problem to determine the safety interval of vibration influence during dynamic compaction machine construction, which involves the determination of Safety specifications, the characteristics of foundation soil, the size of dynamic compaction function level, the size of rammer area and so on. It is difficult to give proper data without field vibration inspection, but not every project has the conditions to do it, especially in the preliminary stage of foundation treatment plan.

强夯机施工产生的振动有以下几点规律：

The vibration produced by dynamic compaction machine construction has the following laws:

1)强夯机振动主频率一般在50Hz以下，且跟着间隔的增大而减小。

1) The main frequency of dynamic compaction machine vibration is generally below 50 Hz and decreases with the increase of interval.

2)强夯机振动的震波在短间隔内主要以面波的办法向周围松散。振动强度跟着距振源点间隔的增大而衰减。振动强度的衰减速率和地基土的特性有关。当地基土层脆弱、松懈、密实度低、厚度大时，振动强度衰减活络;当地基土层稳固密实或土层脆弱厚度薄、下卧土层稳固时，振动强度衰减较慢。

2) In a short interval, the vibration wave of dynamic compaction machine is loose to the surrounding mainly by surface wave. The vibration intensity decreases with the increase of the distance from the vibration source. The attenuation rate of vibration intensity is related to the characteristics of foundation soil. When the local foundation soil layer is weak, loose, low density, and thick, the vibration intensity decreases actively; when the local foundation soil layer is stable and dense or the soil layer is weak and thin, and the underlying soil layer is stable, the vibration intensity decreases slowly.

Lease of dynamic rammer

3)强夯机振源点坐落相对标高低处时，在相对标高较高处的振动效应是扩展;强夯机振源点坐落相对标高较高处时，在相对标高较低处的振动效应是衰减。

3) When the vibration source point of dynamic compaction machine is located at the low relative elevation, the vibration effect at the higher relative elevation is expansion; when the vibration source point of dynamic compaction machine is located at the higher relative elevation, the vibration effect at the lower relative elevation is attenuation.

4)强夯机振动强度跟着能级的增大而增大，跟着夯锤面积的减小而减小。

4) The vibration intensity increases with the increase of energy level and decreases with the decrease of hammer area.

强夯机主要用于建筑方面，而对于强夯机所在进行施工中由于土壤压实机的需要，往往采用强夯机压实机械的类型有很多，一只青蛙，振动型，一步一步，夯实，吊锤锤式，根据工程需要，所以运用不同类型的强捣固机，固定地基的好帮手。

Dynamic compaction machine is mainly used in construction, and for the construction of dynamic compaction machine, due to the need of soil compactor, there are many types of compaction machinery, one frog, vibration type, step-by-step, tamping, hanging hammer type. According to the needs of the project, different types of dynamic tamping machines are used to fix the foundation.

另外还有一方面，则针对强夯机的应用，其主要是由一些高冲击锤的高度可以是物质的砾石，碎石，炉渣，对地基强度性能较好，地基中形成颗粒墩，墩墩复合地基的形成，从而为了方便，以提高地基承载力，减少沉降。在动力置换过程中，土体结构遭到破坏，地基土产生超静孔隙水压力，但随着时间的推移土体结构强度会恢复。粒状桥墩一般具有良好的透水性，有利于超孔隙水压力消散和固结。

On the other hand, for the application of dynamic compaction machine, the main reason is that the height of some high impact hammers can be gravel, gravel, slag, which has good performance on the foundation strength, the formation of granular pier in the foundation, the formation of pier pier composite foundation, so as to improve the foundation bearing capacity and reduce settlement. In the process of dynamic replacement, the soil structure is destroyed, and the foundation soil produces excess pore water pressure, but the strength of soil structure will recover with time. Granular bridge piers generally have good water permeability, which is conducive to dissipation and consolidation of excess pore water pressure.