The Rapid Impact Compaction can be installed on excavators and loaders for construction. It is easy to install and operate. It can quickly and accurately reach the compaction site for rapid and effective compaction. The Rapid Impact Compaction of excavator has three gears. In order to solve the harm of different gears to the actual effect of rib compaction, Hongmei is used to arrange compaction points on the foundation surface rolled to the standard at the connection of new and old foundations. The key spacing of compaction points is 150cm, and the edge spacing of adjacent compaction points is 50cm. Different points are tamped with I, II and III for 18 times, and the settlement is checked with a level gauge every 3 times. Three points are taken under the specification of each stop to observe the settlement. The observation results can be seen. The actual effect of ⅲ ribbed pressure is the best, and the actual effect of ⅱ ribbed pressure is the worst. According to the evaluation data information, the actual effect of III three times of compaction is more than or close to grade I and II. The actual effect is document compaction.

In order to study the harm of the compaction times of the Rapid Impact Compaction of the excavator to the actual compaction effect, it is selected to backfill the Loess Foundation at the back of the buttress retaining wall, and after rolling, the III document carries out 6 times, 9 times, 12 times, 15 times, 18 times, 21 times and 24 times of compaction tests at different selection points. During the experimental operation, check the tamping settlement every 3 hammers. After compaction, use a ring knife to compact with different compaction times.

According to the tamping settlement caused by different tamping times at each point, the excavator hydraulic tamping machine performs rib compaction on the loess layer foundation according to different rib compaction positions and compaction quality requirements. At the same time, considering the high efficiency of rib compaction construction, 12-18 times per point, the compaction amount caused by the last three hammers is not suitable to exceed 1cm~1.5cm.

After the development of ribbed compaction, sampling inspection shall be carried out for the compaction degree of different times of compaction points and different depths. From the change of compaction degree caused by different compaction times, the excavator Rapid Impact Compaction is used to compact the loess layer foundation according to the rib compaction position and compaction quality requirements. At the same time, considering the high efficiency of rib compaction construction, the thickness of rib compaction should not be too large. Each backfill is 1m~1.5m, that is to say, it is necessary to add a rib, and the number of compaction at each point is 12 ~ 18.

In order to study the harm of tamping point spacing to the actual compaction effect, after the loess foundation is backfilled at the back of the wall and compacted, the tamping point spacing is 1.25m, 1.5m, 1.75m and 2.0m respectively, and the tamping test is carried out. The layout method of tamping points is red plum pattern. According to the previous experimental results, the compaction times of each point are named as 18 times, and each compaction is 3 times to observe the compaction amount. After compaction, the key points at the compaction point, the edge of the compaction point, and the key points between the two points are different depths. Ring knife sampling is used to detect the degree of compaction.

According to the sharing of Rapid Impact Compaction machine manufacturers, I want to master the reinforcement and compaction level of loess foundation of some high-speed Rapid Impact Compactions. In different pressure gears, the pressure frequency and pressure interval will also have different effects on the reinforcement and compaction effect. HC plays a representative role in the reinforcement and compaction of loess foundation, and the excavator Rapid Impact Compaction provides a powerful reference for the reinforcement and compaction construction in the future.