In construction projects, because of the need for loose soil compaction, dynamic compactors are often used. There are many types of dynamic compactors, including frog type, sensational type, leaping type, ramming type, and hanging hammer type. According to the needs of the project, different types of dynamic compactors are used. Next, let's talk about the construction principle of the dynamic compactor and several construction precautions.
Construction principle of dynamic compaction machine
Dynamic compaction replacement is a method for strengthening saturated soft clay foundation. The strengthening mechanism of dynamic compaction replacement method is different from that of dynamic compaction method. It uses the high impact energy generated by the height drop of the heavy hammer to forcibly squeeze the gravel, rubble, slag and other useful data into the foundation, forming one granular pier in the foundation, and the soil between the piers forms a composite foundation,
To improve the bearing capacity of the foundation and reduce the settlement. In the process of dynamic compaction replacement, the soil structure is damaged, and the foundation soil has excess pore water pressure. However, with the addition of time, the soil structure strength will recover. Granular material piers generally have good water permeability, which is conducive to the loss of excess pore water pressure in the soil and consolidation.
Several precautions for construction of dynamic compaction machine
1. When the dynamic compactor is not equipped with additional equipment, the tamping energy level can reach 400 tons and 1000 tons with gantry, which can meet the requirements of most dynamic compaction construction.
2. Weichai engine with excellent functions, with engine power up to 220 horsepower, provides a reliable, economic and environmental power source.
3. The elastic chassis organization of crawler crane is used, which has extendable folding support and high chassis strength. During operation, the track length is 6105 mm, the width reaches 5100 mm, the chassis ground clearance is more than 280 mm, and the ground specific pressure is only 0.073 MPa. The stability of the whole machine is better.
4. The overall dimension of the main machine is 5500x5100X3100mm, and the large unit weight is 41 tons. During the transportation, only the boom and counterweight need to be removed, so it is not necessary to collapse the transportation. The transportation is convenient and the cost is low.
5. Inverted tissue resists 180 tons of compound pressure and has high reliability.
6. The built-in planetary reducer and high torque walking motor have large driving force, strong climbing ability, and are not affected by the outside world with high reliability. The clearance from the chassis to the ground is more than 380mm, and the specific ground pressure is only 0.073MPa, so the passing capacity is strong.
7. The lifting winch of the dynamic compactor with the function of free hook dropping, and the built-in normally closed brake can ensure the firm braking of the hammer of the dynamic compactor.
8. The luffing winch organization equipped with ratchet locking ensures the safe and reliable positioning of the boom of the dynamic compactor.
9. The boom of the dynamic compactor formed by welding high-strength structural pipes has good rigidity, light weight and strong bearing capacity. The upper boom of the dynamic compactor has a forward "goose head" structure, which is more suitable for dynamic compaction construction.
10. The load sensing hydraulic dynamic compactor control system operated by the armrest box type pilot handle has the function of inching and is easy and sensitive to operate.
11. Reversal organization with controllable free slip function, stable operation, no impact.
12. The hydraulic system of the dynamic compaction machine with independent heat dissipation can ensure the long-term and high-power operation of the hydraulic system.
13. The suspended counterweight of the dynamic compactor is more convenient for installation, disassembly and transportation.
14. With gantry, the tamping energy can reach 1000 tons.
15. The useful volume of the enlarged fuel tank is up to 400 liters, which can guarantee the operation of a day.
In addition, the dynamic compaction machinery is a large construction machinery. During operation, corresponding technical methods and monitoring methods should be adopted to ensure the safety of the whole construction. The working place of the dynamic compactor shall be flat, and the gantry base and the rammer landing position shall be horizontal. More relevant precautions come to our website http://www.sddhfjx.cn Consult!