The small editor of Shandong Leibo heavy industry of dynamic compactor will discuss with you about selecting one or more test areas for test compaction or test construction before dynamic compaction construction. The number of test areas shall be determined according to the complexity of the construction site, construction scale and building type.

1、砂桩的加固。夯沙桩在所有软土中仅起垂直排水作用，因此其整体密度函数不及夯碎石桩，一般可作为区域地基预处理方案。处理后可作为一般建筑物、车间、道路的简易设备基地使用。对于重型设备，通过设备桩基检查和补充。选择几个桩基比直接在所有软土上选择桩基更经济。此时，经过处理后，地基的性能显着提高，桩的侧向力也大大提高。考虑了桩土相互作用，倒塌和液化对桩基承载力的影响，整体效果良好。

1. Reinforcement of sand pile. The rammed sand pile only plays the role of vertical drainage in all soft soil, so its overall density function is not as good as the rammed gravel pile, which can generally be used as the regional foundation pretreatment scheme. After treatment, it can be used as a simple equipment base for general buildings, workshops and roads. For heavy equipment, check and supplement the pile foundation of the equipment. Selecting several pile foundations is more economical than directly selecting pile foundations on all soft soil. At this time, after treatment, the performance of the foundation is significantly improved, and the lateral force of the pile is also greatly improved. The interaction between pile and soil is considered, and the overall bearing capacity of pile foundation is good.

2、压实碎石桩在压实碎石桩顶部的加固效果不如强夯。对于软土，结合堆放的夯实碎石加强夯实，加固效果会非常显着。压实的碎石桩既可以起到侧向压实的作用，又可以起到竖向排水的作用。与纯碎石桩相比，碎石桩压实度小，工艺可以简化。与纯碎石桩方案相比，其总造价基本持平或仅略高，加固后可满足一般建筑物、工业厂房、设备根部的承重和变形要求。

2. The reinforcement effect of compacted gravel pile at the top of compacted gravel pile is not as good as that of dynamic compaction. For soft soil, the reinforcement effect will be very significant if the compaction is strengthened in combination with the stacked compacted gravel. The compacted gravel pile can not only play the role of lateral compaction, but also play the role of vertical drainage. Compared with the pure gravel pile, the compaction degree of gravel pile is small, and the process can be simplified. Compared with the pure gravel pile scheme, its total cost is basically the same or only slightly higher. After reinforcement, it can meet the load-bearing and deformation requirements of general buildings, industrial plants and equipment roots.

3、砾石柱的强夯工艺是将夯锤的平坦底面（一般为强夯）改为锥形底面，减小直径，抬升插入底座，形成锥形。夯锤，然后卸下夯锤。夯坑内填入碎石，形成碎石墩，然后重新夯实，将碎石墩的碎石挤入软土中进行置换加固。

3. The dynamic compaction process of gravel column is to change the flat bottom surface of the rammer (generally dynamic compaction) into a conical bottom surface, reduce the diameter, lift and insert it into the base to form a cone. Hammer, and then remove the hammer. Fill the tamping pit with gravel to form a gravel pier, and then re tamp it. Squeeze the gravel of the gravel pier into the soft soil for replacement and reinforcement.

4、真空预压或叠压预压常用于处理软地基。与直接选用桩基相比，该工艺方案成本低，但周期很长，一般需求近一年甚更长，加固效果只能达到80 -100 kPa。根据预压S-T曲线分析发现，预压沉降一般发生在前三个月，约占30-50。如果工期特别紧急，可以先在软土底部设置袋装沙坑，在地表铺厚度的碎石土，有利于形成水平排水通道，便于行走。工具。然后用加固硬壳层并去除剩余的软基沉降。

4. Vacuum preloading or superimposed preloading is often used to treat soft foundation. Compared with the direct selection of pile foundation, the process scheme has low cost, but the cycle is very long, the general demand is nearly one year or even longer, and the reinforcement effect can only reach 80-100 kPa. According to the analysis of preloading S-T curve, Preloading Settlement generally occurs in the first three months, accounting for about 30-50. If the construction period is particularly urgent, the bagged sand pit can be set at the bottom of the soft soil first, and the gravel soil with thickness can be paved on the surface, which is conducive to the formation of horizontal drainage channel and easy to walk. Tools. The hard shell layer is then reinforced with and the remaining soft foundation settlement is removed.

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