High-speed hydraulic tamping machine is a kind of compaction machine that uses the dynamic force of the machine's own gravity and hydraulic action to compact the soil. This method of compaction of soil can be called "dynamic reinforcement method" or "dynamic compaction method". The hydraulic and PLC automatic control functions of the machine enable this type of operation.
The hydraulic cylinder raises the upper hammer head to a set height and then applies force in reverse. The upper hammer head accelerates and descends under the combined action of gravity and hydraulic cylinder assistance, and the lower hammer head is hit by a conductive pad to compact or fill the foundation. So as to achieve the purpose of increasing the density of soil and stone. High-speed hydraulic tamping machine is a kind of professional equipment widely used in engineering construction in recent years, and the use of high-speed hydraulic tamping machine in engineering construction has the following advantages:
The high-speed hydraulic tamping machine has a significant effect on eliminating the settlement differences in bridges, culverts and subgrades, which is due to different construction schedules and process conditions of different professional construction teams and other factors such as rush schedules.
2. In view of the inherent defects and improper operation defects of the layered compaction subgrade, the high-speed hydraulic tamping machine can also eliminate the post-construction settlement that may occur when the foundation is used in advance, and solves the current common bridgehead jumping, the junction between the new and old subgrade and the subgrade. The problem of uneven settlement at the intersection of filler excavation.
3. High-speed hydraulic tamping machine can also be used to compact new and old intersections, oil depots, ports, airports, urban buildings and municipal sanitation waste backfilling, as well as inconvenient or unable to use impact rollers and heavy rammers and other large construction machinery sections.
Relatively speaking, the tonnage of the high-speed hydraulic tamping machine is small, but while the working hammer head falls freely, it also has a hydraulic assistance auxiliary function, and the working area of the hammer head is small but it will also form a large impact force. And sometimes the compaction strength of high-speed hydraulic compactors will exceed the compaction strength of some small compactors. Therefore, high-speed hydraulic tamping machines are also called light hydraulic tamping machines.
The hydraulic rammer or light tamping machine mentioned here is an alias for what we usually call a high-speed hydraulic tamping machine. Many friends who have been engaged in engineering design for many years cannot immediately call out the scientific name of high-speed hydraulic tamping machine. Instead, it is named after how it works, and they call it a "hydraulic rammer" or "light tamping machine.".
In fact, high-speed hydraulic tamping machines and rammers are two completely different compaction equipment. However, they all work by converting kinetic energy into impact energy to compact the soil, but their stroke method and tampon frequency are different. The stroke of the high-speed hydraulic tamping machine is about 2001600mm, and the frequency is very fast, up to about 30 times per minute, while the punching stroke of the rammer machine can reach tens of meters, and the frequency is low.
The ramming machine uses mechanical force to raise the heavy object to a few meters or tens of meters to freely fall to compact the soil, thereby forcing the soil to compact and reduce its compressibility, improving the soil environment. This reinforcement method is known industrially as the "ramming method". It is mainly suitable for coarse-grained soils with particle size greater than 0.05mm, such as sandy soil, gravel soil, mountain bark soil, fly ash, miscellaneous soil, slightly expanded soil and collapsible soil loess soil has no obvious enhancement effect on saturated silt and cohesive soil.