• Email : ricmadeinchina@gmail.com

When compacting a sloped area is it best to roll up and down a slope or across it?

update time:2022-09-15 09:24:30

  • There are many construction projects for rapid impact compaction machine, among which HC84 rapid impact compaction machine participated in the construction of Hong Kong International Airport and Xiamen International Airport. HC150 participated in the construction of Jizan airport in Saudi Arabia and China Jinan Yaoqiang Airport and Dubai Airport, United Arab Emirates. HC36 and HC42 rapid impact compactors participated in the construction of major highways in China and Yangshan Port in Shanghai.

The compaction effect of the Rapid Impact Compactor is characterized by pulse-shaped loading of the ...

The RIC, imparts energy by dropping a 5 to 9 tonne weight from a relatively small height of 1.2 m at a blow rate of 30 to 80 times a minute. Depending on the ram weight, the maximum energy delivered per blow is 59 to 106 kNm. Although the energy per blow is small compared to the conventional DC, the rapid blow frequency amply compensates, resulting in a greater power that varies between 2.4 to 6.4 MNm/min. Thus, a much greater total energy input per unit area of a site can be achieved with RIC. Moreover, the energy transfer of the RIC is far more effective due to its foot which stays in contact with the ground during the impact sequence. 

Rapid impact compactor on display in the workshop

Numerous developments of the last decades provide a broad range of near-surface compaction technologies (such as static and dynamic rollers) and deep compaction techniques (such as deep vibro-compaction, vibro-flotation and deep vibroreplacement, heavy tamping). However, until recently no device was available for middle-deep compaction. The lately introduced Rapid Impact Compactor (RIC) aims at closing the gap between the surface compaction methods and the deep compaction methods, and permitting a middle-deep improvement of the ground up to a depth of 4 to 10 m.

Rapid Impact Compaction Subgrade Treatment

The compaction effect of the Rapid Impact Compactor is characterized by pulse-shaped loading of the ground and is achieved by a specific number of blows. The ground to be improved is both compacted and displaced depending on the soil type, thus, causing plastic deformations in the near-field while elastic waves are generated in the far-field. The nature of vibration excitation (transient or periodic) is one of the limiting factors for the allowable impact on buildings and human beings and has to be taken into account for the assessment of standardized limit values. 

3t Rapid impact compactor

Advantages of Rapid impact compaction:

The bearing capacity of the soil is increased after it is treated.

Minimizes settlement to a greater extent and provides uniform support for a floor slab or foundation footing, while controlling vibrations to 2 inches per second within 30 feet of the drop point.

Rapid Impact Compaction consolidates the soil immediately instead of using a surcharge to consolidate the soil under a static weight.

Loose fills or soils can be consolidated immediately without the need to replace the soil.

When the soil is treated by Rapid impact compaction, the stiffness of the upper 10 feet of soil affects the lateral load capacity of a pile. By densifying the upper layers, the lateral load capacity is greatly increased.

Rapid impact compaction effect display