Dynamic compaction lease layout can be arranged in quincunx or square grid. The number of blows and times of dynamic compaction at each point shall be determined according to the design requirements. According to the layout, the compaction shall be completed once in D, the gap of the compacted points shall be selected for the second time, and the point tamping shall be conducted twice in turn, and the following passes shall be conducted in the middle. When all points are tamped, the low hammer shall be used for full tamping again, and the tamping marks shall be mutually pressed by 1 ／ 2 or 1 ／ 3, so as to reinforce the loose soil and the loosened topsoil layer between the previous tamping points.
1. Surveying and setting out: one ds-3 level and one J6 theodolite shall be used to determine the dynamic compaction area and point layout according to the requirements of the construction drawing, and coordinate control network foundation piles shall be set outside the dynamic compaction range. Meanwhile, benchmark points shall be reasonably arranged around them as the basis for controlling elevation and subgrade settlement.
2. Trial compaction: before heavy hammer compaction construction, trial compaction shall be conducted to determine the weight, bottom area and falling distance of the hammer, so as to determine the post settlement, corresponding times of small compaction and total settlement.
Due to the cost constraints, it is difficult for the dynamic compaction rental construction team to purchase high-quality construction materials. The quality of construction materials directly affects the quality of the dynamic compaction project. On the other hand, it will also affect the construction progress. The dynamic compaction equipment construction party has to reduce the operating personnel due to the construction cost, and the lack of sufficient construction personnel will delay the construction period. In terms of project quality, we should reasonably arrange the dynamic compaction cost scheme.
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