Construction machinery - - Types of pile drivers

The spiral pallet is mainly composed of power head, drill rod, pillar, hydraulic walking chassis, turning structure, crankshaft, operation room, electrical system, hydraulic system, shipping agency, and so on. Under the working condition, the hydraulic system can be manipulated to achieve walking, turning, lifting and landing columns and pile positions. During work, the power head drives the drill rod, the drill head rotates, the crankshaft controls the lifting and lowering of the drill, and the soil being cut by the drill is conveyed to the ground by a spiral blade. Drilling to a design depth is drilled into a hole, and depending on the technical requirements, the drill can also be drilled while pressuring concrete (or mud) to form a pile.

The main body of the diesel hammer pile driver is also composed of cylinder and plunger . Its working principle is similar to that of a single-cylinder two-stroke diesel engine . It uses the strong pressure generated by the post-combustion explosion of atomized diesel sprayed into the cylinder combustion chamber to drive the hammer head . The diesel hammer is divided into guide rod type and cylinder type。The cylinder diesel hammer is used to hammer a pile using the core (upper piston or impact body) moving repeatedly; The two-conductor diesel hammer is a piston fixed and the cylinder repeatedly moved as a impact body to hammer and hit a pile, and has been gradually eliminated because of its hammering energy and short service life. Nowadays, cylindrical diesel piling hammers are widely used.In particular, in recent years, the production of drum diesel hammer, fuel throttle is divided into 4 gears, 1 gear minimum, 4 gear maximum, when the pile generally use 2 ~ 3 gear, the operator is easy to master, the impact energy is also easy to estimate.

The jacking machine is a new type of piling machinery that is mainly used in coastal soft foundation treatment and peri-sea land reclamation construction. After the plug machine is in place, it sinks at the plug position by a vibration hammer. The drain board passes through the tube and is connected to the anchor boot at the end. The tube holds the anchor boots and inserts the drain board to the design depth of soil entry. After the tube is pulled up, the anchor Boots remain in the soil together with the drainboard. The continuous drain board is then cut, completing a drain hole insert operation. Plug-ins are increasingly able to use their advantages today when the world popularizes sea-building, and weak foundations must be treated before they can be used, so plug-ins will still have a place in the construction industry in the future.

Vibratory pile hammer is a kind of equipment which is used to drive the object into the ground after being electrified. An electric motor is used to drive a pair of centrifugal blocks to rotate oppositely, so that the horizontal centrifugal forces generated by them are offset by each other, and the vertical centrifugal force is superimposed on each other. By the high speed of the centrifugal wheel, the gearbox produces vertical up and down vibrations, thereby achieving the purpose of stoning. The utility model relates to a vibratory pile hammer, which belongs to a pile foundation construction machine used in construction engineering. When paired with the pile rack, it can sink concrete filling piles, concrete bottoming piles (garlic piles), lime piles, sand piles, and gravel piles; After fitting a pile holder, it can lift concrete prefabricated piles and various steel piles. It is the ideal equipment for basic construction of roads, bridges, airports, buildings, etc. In addition, the vibratory pile hammer can also be used as the pile driving hammer of the vibratory pipe sinking machine, the plate-inserting machine and other machines. The vibratory pile hammer will be mainly used in the construction of vibratory sinking pipe pile.

A rotary drill is a construction machinery suitable for perforated operations in architectural foundation projects. It is mainly suitable for the construction of sand, viscous soil, powder soil and other soil layers, and is widely used in foundation construction of many kinds such as filling posts, continuous walls, and foundation reinforcement.The rated power of the rotary drill is generally 125 to 450 kW, the power output torque is 120 to 400 kN · m, the maximum hole diameter can reach 1.5 to 4 m, and the maximum holes depth is 60 to 90 m, which can meet the requirements of various large basic construction.

This type of drill generally uses hydraulic carry-on retractable chassis, self-lifting foldable drill mast, retractable drill rod, automatic vertical detection adjustment, digital pore depth display, and so on. The entire operating system generally takes hydraulic lead control, load sensing, and has the characteristics of light operation and comfort. The main and secondary cranks can be adapted to the needs of a variety of situations on a site. This type of drill is suitable for poring operations in dry (short screw) or wet (revolving drill) and rock formations (core drill). It can also be equipped with long auger, underground continuous wall grab, vibratory pile hammer, etc. It is mainly used in municipal construction, road, industrial and civil construction, underground continuous wall, water conservancy, anti-seepage slope protection and so on. Experts in China believe that there will still be a large market for rotary drilling rigs in the country in the coming years.

The essence of subterranean rock cutting is to submerge the shocker into the hole during the rock cutting process to reduce the energy loss caused by the shaft transferring the impact, thereby reducing the impact of the hole depth on the rock mining efficiency. The drilling machinery is divided into two categories: rock drillers and drillers, and the drillers are also divided into open-pit drillers as well as underground drillers. In recent years, famous foreign subterranean drill manufacturing companies have launched a series of new products. The common feature of these devices is that the degree of self-activation is getting higher and higher, and some functions realize the application of intelligent iGPS technology in these rigs. The automatic positioning of the arm frames has been achieved, saving time for field marking and positioning, improving operational efficiency and enabling the operator to focus on monitoring the process of drilling. At the same time, greater emphasis will be placed on safety and environmental protection, as well as the improvement of human-machine relations.

A horizontally directed drill is used to lay a variety of underground utilities (pipelines, etc.) without digging the ground surface. Cable, etc. is a construction appliance, which is widely used in water supply, electricity, telecommunications, natural gas, gas, oil and other pipeline laying facilities. It is suitable for sand, clay, cobbles and other conditions, and can be constructed in most non-hard rock areas of China. The horizontal direct drilling technology is a new construction technology that combines the direct drilling technique of the oil industry with the traditional pipeline construction method. It has the advantages of fast construction speed, high construction accuracy and low cost, and is widely used in water supply, gas, electricity, telecommunications, natural gas, oil and other pipeline laying works.

The positive and negative circulating drilling rig is a drilling machine that uses mud pump to suck out the mud carrying the rock slag from the bottom of the hole . The positive and negative circulating drilling rig is a drilling rig which is widely used in the construction of subway foundation pit and high-rise building foundation pit . Because mud wall is used to form hole , the noise is low when forming hole .

The impact drill is an important drilling machine for pile foundation construction , which uses the impact force of the drill bit to drill holes in the rock . It can adapt to all kinds of different geological conditions, especially in the gravel layer drilling, the impact drill is more adaptable than other types of drill。At the same time, using impact drill hole, after the hole, the hole wall around the formation of a dense soil layer, the stability of the hole wall, improve the bearing capacity of pile foundation, have a certain role.

In the treatment method of soft ground foundation, a new construction method instead of vibroflotation rubble pile appeared, the construction technology of vibro-dredged pipe compaction rubble pile。Vibration sinkhole crushing silos. A vibration hammer is attached to the silo,The pipe is driven into the ground by the vibrating force of the vibrating hammer. After reaching the elevation, the concrete is poured. （The pipe has a feeding mouth, and the feeding hopper is lifted by the winch of the pile machine） The concrete is poured while the pipe is vibrated and pulled out, and the concrete is vibrated and compacted. The concrete is poured to the elevation. Vibration pipe pile driving machine as a large pile machine , there are several types of walking pipe , walking type , crawler type , power is commonly known as 60 , 75 , 90 , 110 , 120 and even 150 . Choose the model according to the design requirements of pile diameter, pile length and geological conditions。Vibration pipe jacking compaction rubble pile has the characteristics of simple equipment, convenient operation, low cost, fast construction and no pollution. It is widely used in soft foundation treatment.