In order to study the harm of the ramming frequency of the rapid impact compactor to the actual compaction effect, after backfilling the loess layer foundation on the back of the buttress retaining wall, select the file III to carry out 6, 9, 12, 15, 18, 21, and 24 ramming experiments. During the test operation, the tamping amount was observed once every 3 hammers. After compaction, use a ring knife to sample and check different tamping frequencies at different depths of the core of the tamping point.

According to the amount of compaction caused by different frequencies, the 36KJ rapid impact compactor is used to rib the loess foundation. According to the different ribbed compaction parts and compaction quality requirements, considering the high construction efficiency of the ribbed compaction project, the frequency of compaction at each point is 12 to 18 times, and the final compaction weight caused by 3 hammers should not exceed 1 cm ~ 1.5 cm cm.

After rib compaction, sampling inspections are carried out on the cores of different frequencies of compaction points at different depths. From the change of compaction density caused by different frequencies, the 36KJ rapid impact compactor is used to rib the loess layer foundation. According to the different ribbed compaction parts and compaction quality requirements, considering the high construction efficiency of the ribbed compaction project, the thickness of the ribbed compaction should not be too large, and the rib should be reinforced once every 1m~1.5m of backfilling, and the frequency of tamping at each point 12 to 18 times is appropriate.

In order to scientifically study the harm of the interval of ramming points to the actual effect of compaction, after the foundation of the backfill earth loess layer is rolled on the back of the wall, the ramming point intervals are respectively 1.25m, 1.5m, 1.75m and 2.0m for tamping experiments, and the tamping points are arranged in red Plum style. According to the previous experimental results, the tamping frequency of each point was named 18 times, and the tamping weight observation of each point was 3 times. After compaction, take samples with a ring knife to check the compactness of the core and edge of the compaction point.

Through sharing with hydraulic compactor manufacturers, we must have a certain understanding of the loess foundation of rapid impact compactors. Different ramming gears, ramming times and ramming distances will also have different effects on the tamping effect. The 36KJ rapid impact compaction machine plays a symbolic role in the reinforcement and compaction of loess foundations, providing a foundation for the later reinforcement and compaction work. Powerful reference.

(1) After compacting the loose soil, the soil density needs to be measured, and the compaction degree should be kept above 96%. This compaction ratio is better and the compaction efficiency is high. The embankment is compacted in this form, which has obvious advantages compared with other types of compaction modes, and it is difficult for other equipment to achieve such compaction effect. For the adjustment of the tamping degree, it can mainly be determined according to the deformation degree of the tamper, and the actual tamping strength needs to be analyzed according to the specific situation.

(2) Analyzing the compaction depth, under the construction operation of the general compactor, it is more effective for the filling thickness of 25-40cm, while the rapid impact compactor is still effective at the filling depth of 1.8m. The compaction effect is more obvious.

(3) In the analysis of compaction particle size, the high-speed hydraulic compactor can record the soil deformation in actual operation, and detect the compaction effect according to the soil density. This aspect of the technology is beyond the reach of other ordinary compactors.

(4) The rapid impact compaction equipment method is relatively high-tech, and is a subgrade construction technology with a high degree of automation and good construction effect. There are many construction methods, such as roadbed filling method, gravel soil and platform filling method, loose filling method, etc. These methods are widely used in actual highway subgrade construction.