The mechanical equipment used in dynamic compaction and dynamic compaction replacement construction is very common, and the use of skills is simple. The bearing capacity of foundation after compaction is obviously strengthened by about two to five times, which can effectively avoid settlement or deformation. The important thing is that the construction period may be shortened by half, and the cost can be saved by a large part. Dynamic compaction support method is to change the soil quality of the deep foundation pit by using greater strength of compaction, so as to make the soil quality meet the needs of foundation pit support.
The construction method of dynamic compaction replacement is simply to use strong compaction to force the crushed stone or block stone into the foundation soil layer continuously, and then repeatedly tamp and fill the soil layer until it can reach the required bearing layer. At this time, the solid pier column can be formed. The nominal load energy of the foundation soil layer will be transmitted to the bearing layer through the pier column, so it has reached the soil characteristics standard of dynamic compaction support.
For the deep foundation pit support project, before the dynamic compaction or dynamic compaction replacement operation, the dynamic compaction company should first carry out the construction operation of the water stop curtain, and then wait for the completion of the process, prepare to precipitation to the deep foundation pit, so that the groundwater position of the deep foundation pit is lower than the nominal height of 1.5 meters of the dynamic compaction foundation, At the same time, in the three directions of East, West and North, the slope shall be naturally excavated to half a meter of the elevation parameter value according to the ratio of 1:1.2, and then the backfill dynamic compaction construction shall be performed, and the soil nailing support engineering shall be treated according to the effect of individual dynamic compaction.