The treatment of dynamic compaction construction is different from other construction projects. The reinforcement effect of most foundation treatment methods can not be brought into full play after the completion of construction, but also can be gradually reflected after a period of time after the completion of construction. The foundation treatment of each section has its particularity, and the foundation treatment effect is mostly concealed works, so it is difficult to directly test its treatment effect, Therefore, the above precautions are very important. What should be paid attention to during dynamic compaction construction:

(1)在强夯施工处理中，除了需要了解如何施工之外，还需要了解所采用处理方法的原理、技术标准和质量要求。

(1) In the dynamic compaction construction treatment, in addition to knowing how to construct, it is also necessary to understand the principle, technical standards and quality requirements of the treatment method.

(2)进行施工质量和处理效果的检验，以此确保工程质量。

(2) Inspect the construction quality and treatment effect to ensure the project quality.

(3)充分作好相应强夯施工方面的监测工作，以保证施工的正常进行，通过观察收集数据为下一阶段的工作提供可靠的依据。

(3) Fully monitor the corresponding dynamic compaction construction to ensure the normal progress of construction, and collect data through observation to provide a reliable basis for the next stage of work.

(4)要采用可行的检测手段来检验处理效果。

(4) Feasible detection methods should be used to test the treatment effect.

(5)通过分析可获得必要的参考值，可以验证设计，必要时还可以进行设计修改，也可通过分析来获得相应宝贵的经验。

(5) Through analysis, we can obtain necessary reference values, verify the design, modify the design if necessary, and obtain corresponding valuable experience through analysis.

强夯施工的置换墩深由土质决定，一般深不超过7m。对淤泥、泥炭等黏性软弱土层，置换墩应穿透软土层，着底在较好土层上，以免产生较多下沉。对深厚饱和粉土、粉砂，墩身可不穿透该层，因墩下土在施工中密度变大，强度提高有保证，故可允许不穿透该层，强夯置换法的单击夯击能应根据现场试验确定。

The replacement pier depth of dynamic compaction construction is determined by the soil quality, and the general depth is no more than 7m. For cohesive soft soil layers such as silt and peat, the replacement pier shall penetrate the soft soil layer and land on the better soil layer to avoid more subsidence. For deep saturated silt and silt, the pier body can not penetrate this layer. Because the density of the soil under the pier increases during construction and the strength is guaranteed, it can not penetrate this layer. The single tamping energy of dynamic compaction replacement method shall be determined according to the field test.

墩体材料可采用级配良好的块石、碎石、矿渣、建筑垃圾等坚硬粗颗粒材料，粒径大于300mm的颗粒含量不宜超过全重的30％，因为墩体材料级配不良或块石过多过大，均易在墩中留下大孔，在后续墩施工或建筑物使用过程中使墩间土挤入空隙，下沉增加。

The pier body material can be hard coarse-grained materials such as well graded block stone, gravel, slag and construction waste. The content of particles with particle size greater than 300mm should not exceed 30% of the total weight. Because the poor grading of pier body material or too much block stone are easy to leave large holes in the pier, the soil between piers will be squeezed into the gap and the settlement will increase in the process of subsequent pier construction or building use.