现在的建筑工程的地基都需要对松土进行压实处理，也就都离不开打夯，需要夯实到某种程度才算合格，这样就对打夯机有了某些指标上的要求，因此就需要用到强夯机。那么强夯机租赁人员介绍强夯法的三种不同加固机理。

At present, the foundation of construction projects all need to be compacted with loose soil, which is inseparable from tamping. It needs to be tamped to a certain extent before it is qualified. In this way, there are some requirements on the indicators of the rammer, so a dynamic rammer is needed. Then the leasing personnel of the dynamic compaction machine introduced three different strengthening mechanisms of the dynamic compaction method.

1、动力固结：当强夯法应用于处理细颗粒饱和黏土时，其加固机理则是动力固结理论。强夯时，巨大的冲击能量在土中产生很大的应力波，破坏土体的原有结构，使土体局部发生液化并产生许多裂隙，增大了排水通道，使孔隙水顺利逸出，待超孔隙水压力消散后，土体固结。由于软土的触变性，强度得到恢复。

1. Dynamic consolidation: when the dynamic consolidation method is applied to treat fine saturated clay, its reinforcement mechanism is the dynamic consolidation theory. During dynamic compaction, the huge impact energy generates a large stress wave in the soil, which destroys the original structure of the soil, causes local liquefaction of the soil and many cracks, increases the drainage channel, and makes the pore water escape smoothly. After the excess pore water pressure dissipates, the soil is consolidated. Due to the thixotropy of soft soil, the strength is restored.

2、动力密实：采用强夯法加固多孔隙、粗颗粒、非饱和黏土是基于动力密实的机理，即冲击型动力荷载，使土体中的孔隙减小，土体变得密实，从而提高地基土强度。非饱和土的夯实过程，就是土中的气相（空气）被挤出的过程，其夯实变形主要是由于土颗粒的相对位移引起。

2. Dynamic compaction: the dynamic compaction method is used to reinforce porous, coarse grained and unsaturated clay based on the mechanism of dynamic compaction, namely impact dynamic load, which reduces the pores in the soil and makes the soil dense, thus improving the strength of foundation soil. The compaction process of unsaturated soil is the process in which the gas phase (air) in the soil is squeezed out, and its compaction deformation is mainly caused by the relative displacement of soil particles.

3、动力置换：动力置换可分整式置换和桩式置换。整式置换是采用强夯将碎石整体挤入淤泥中，其作用机理类似于换土垫层。桩式置换是通过强夯将碎石填入土中，部分碎石桩（或墩）间隔地夯入软土中，形成桩式（墩式）的碎石桩（墩），其作用机理类似于振冲法形成的碎石桩，整体形成复合地基。

3. Dynamic replacement: dynamic replacement can be divided into integral replacement and pile replacement. Integral replacement is to use dynamic compaction to squeeze the gravel into the sludge as a whole, and its mechanism is similar to that of soil replacement cushion. Pile type replacement is to fill gravel into soil through dynamic compaction, and some gravel piles (or piers) are tamped into soft soil at intervals to form pile type (pier type) gravel piles (piers). Its action mechanism is similar to that of gravel piles formed by vibroflotation method, forming a composite foundation as a whole.

强夯施工工艺、操作简单；适用土质范围广，加固效果显著，可取得较高的承载力，一般地基强度可提高2～5倍；压缩性可降低2～10倍，加固影响深度可达6～10m；工效高，施工速度快（一般设备每月可加固5000～10000m地基），较换上回填和桩基可缩短工期一半；节省加固原材料；施工费用低，节省投资，比换土回填节省50%费用，与预制桩加固地基相比，可节省投资50%～70%等。

The construction technology and operation of dynamic compaction are simple; It is applicable to a wide range of soil properties, with remarkable reinforcement effect, and can achieve high bearing capacity. The general foundation strength can be increased by 2~5 times; The compressibility can be reduced by 2~10 times, and the reinforcement depth can reach 6~10m; High efficiency and fast construction speed (5000~10000m foundation can be reinforced by general equipment every month), which can shorten the construction period by half compared with backfilling and pile foundation; Save reinforcement raw materials; The construction cost is low, saving investment, 50% less than the cost of soil replacement and backfilling, and 50%~70% less than the investment of prefabricated pile foundation reinforcement.

强夯法不仅能提高地基土的强度，降低其压缩性，还能改善抗振动液化的能力和消除土的湿陷性，因此它不仅适用于处理碎石土、砂土、粉土、黏性土、杂填土和素填土地基，还常用于处理可液化砂土地基和湿陷性黄土地基。关注我们http://www.sddhfjx.cn，了解更多有关事项！

Dynamic compaction method can not only improve the strength of foundation soil, reduce its compressibility, but also improve the ability to resist vibration liquefaction and eliminate soil collapsibility. Therefore, it is not only applicable to the treatment of gravel soil, sandy soil, silt, cohesive soil, miscellaneous fill and plain fill foundation, but also often used to treat liquefiable sand soil foundation and collapsible loess foundation. Follow us http://www.sddhfjx.cn , learn more about it!