The factors that affect the price of pile drivers (also known as pile drivers and rotary excavators) are as follows:
The price of pile driver is combined with the haulage of pile driver, which has strong integrity, convenient on-site transshipment and low cost. Don't use a crusher to lift things: you can't use a crusher to lift things. This operation not only damages the drill pipe and crusher, but also has potential safety hazards. The pile frame adopts hydraulic system, which can lift the mast column by itself.
Walking, turning and alignment are accurate and reliable, with high construction efficiency and low labor intensity. The price of Wuxi hydraulic pile driver hydraulic hammer pile driver is a new type of pile driver, which is powered by oil pressure, and can adjust the hydraulic pressure according to the different soil quality of the stratum to achieve appropriate impact. The pile driver adopts the combination of hauling and loading, which has strong integrity, convenient site transfer and low cost.
A cushion composed of granular materials with a certain thickness is arranged between the pile driver and the pile and the soil between piles. Under load, because the modulus of piles is much greater than that of soil, the deformation of soil between piles is greater than that of pile top, and piles penetrate into cushion.
With this change process, granular bulk materials are constantly adjusted and supplemented to the surface of the soil between piles, and the roots are always in contact with the soil between piles through the mattress, and the soil between piles has always participated in the operation, so that the bearing capacity of the soil between piles can be carried forward.
Extended data:
Type of rotary drilling rig:
1, drop hammer pile driver
The pile hammer is a heavy steel block, which is lifted and unhooked by a hoist with a hook, and then falls freely along the guide frame for piling.
2. Steam hammer pile driver
Pile hammer consists of hammer head and hammer seat, which is powered by steam or compressed air. There are two kinds of single-acting steam hammer and double-acting steam hammer. Single-acting steam hammer uses plunger or cylinder as hammer head, and steam drives the hammer head to rise, and then makes it fall along the guide rod of hammer seat for piling. Double-acting steam hammer generally uses weighted plunger as hammer head and cylinder as hammer seat. The steam drives the hammer head to rise, and then drives the hammer head to impact the piling downwards.
The up-and-down reciprocating speed is fast and the frequency is high, which makes the pile vibrate when it goes deep into the stratum, which can reduce the friction resistance and achieve good piling effect. The bidirectional differential steam hammer with unequal force has light weight, relatively increased effective impact weight and better performance.
The reversing of the steam inlet and exhaust rotary valves of the steam hammer can be manually or automatically controlled by a flange operating lever installed on one side of the hammer head and lifting with the hammer head. Both methods can adjust the impact stroke of steam hammer.
3. Diesel hammer pile driver
The main body is also composed of a cylinder and a plunger, and its working principle is similar to that of a single cylinder two-stroke diesel engine. The atomized diesel injected into the combustion chamber of the cylinder explodes after being subjected to high pressure and high temperature, which drives the hammer to work. Diesel hammer is divided into guide rod type and cylinder type according to its structural form. The guide rod diesel hammer presses on the pile cap with the plunger as the hammer seat, and lifts along two guide rods with the cylinder as the hammer head.
4. hydraulic hammer pile driver
It is a new type of pile driver, which is started by diesel belt and driven by oil pressure. It can adjust the hydraulic pressure according to the different soil quality of the stratum to achieve suitable impact force for piling. Small and medium-sized hydraulic pile drivers are often used for piling and construction of highway guardrails.
Similar piling equipment includes: hydraulic pile driver, highway pile driver, guardrail pile driver and highway drilling machine. Compared with diesel pile driver, the energy transfer efficiency of hydraulic hammer pile driver can reach 70%~95%, while that of diesel hammer pile driver is only 20%~30%. The piling control of hydraulic hammer pile driver is accurate, which can realize piling operation in different strata.
Hydraulic hammer pile driver has excellent noise reduction, vibration reduction and noise reduction performance, especially suitable for urban construction. Hydraulic hammer pile driver has obvious effect of energy saving and emission reduction, and will be the mainstream of pile driver development in the future.
5. Screw pile driver
Screw hammer is a kind of piling equipment that drives a drill bit to drill holes on an underground drilling rig through a power head. Screw pile driver can be divided into two parts: pile frame and drilling part.