This kind of drilling rig is generally equipped with hydraulic crawler-type telescopic chassis, self-lifting foldable drilling mast, telescopic drill pipe, automatic detection and adjustment of verticality, digital display of hole depth, etc. The whole machine is generally controlled by hydraulic pilot control and load sensing, which is easy and comfortable to operate. The main winch and the auxiliary winch can meet the requirements of various situations on the construction site. With different drilling tools, this kind of drilling rig is suitable for dry (short auger) or wet (rotary bucket) and rock formation (core drill) pore-forming operations. It can also be equipped with long auger, diaphragm wall grab, vibratory pile hammer, etc., to achieve a variety of functions. It is mainly used for municipal construction, highway bridges, industrial and civil buildings, diaphragm walls, water conservancy, anti-seepage slope protection and other foundation construction. Domestic experts believe that there will still be a large market for rotary drilling rigs in China in the next few years. 6. Down-the-hole drill The essence of down-the-hole drilling is to submerge the impactor into the hole in the process of drilling, so as to reduce the energy loss caused by the transmission of impact work by the drill rod, thereby reducing the impact of hole depth on drilling efficiency. Drilling machines are divided into rock drills and drilling rigs, and drilling rigs are divided into open-air drilling rigs and underground drilling rigs. In recent years, the famous foreign down-the-hole drill manufacturing companies have launched a series of new products. The common feature of these equipments is that the degree of automation is getting higher and higher, and some functions are realized. The application of iGPS technology on these drilling rigs realizes the automatic positioning of boom, saves the time of field marking and positioning, improves the operation efficiency, and enables operators to concentrate on monitoring the drilling process. At the same time, more attention should be paid to the improvement of safety, environmental protection and man-machine relationship. 7. Horizontal directional drilling rig Horizontal directional drilling machine is a kind of construction machinery for laying a variety of underground utilities (pipelines, cables, etc.) Without excavating the ground surface. It is widely used in the construction of water supply, electric power, telecommunications, natural gas, coal gas, oil and other pipeline laying. It is suitable for sandy soil, clay, pebbles and other conditions. It can be used in most non-hard rock areas in China. Horizontal directional drilling technology is a new construction technology which combines the directional drilling technology of the petroleum industry with the traditional pipeline construction method. It has the advantages of high construction speed, high construction precision and low cost. It is widely used in the pipeline laying construction projects of water supply, gas, electricity, telecommunications, natural gas, oil and so on. 8. Direct and reverse circulation drilling rig The positive and negative circulation drilling machine is a drilling machine that uses the mud pump to suck out the mud carrying rock debris from the bottom of the hole. The direct and reverse circulation drilling rig is widely used in the construction of subway foundation pit and high-rise building foundation pit. As the hole is formed by adopting the slurry wall protection, the noise is low when the hole is formed. 9. Percussion drill Percussive drilling machine is an important drilling machine in the construction of cast-in-place pile foundation, which uses the impact force of the drill bit to drill holes in the rock stratum. It can adapt to different geological conditions, especially in the pebble layer. Compared with other types of drilling rigs, the impact drilling rig has stronger adaptability. At the same time, a layer of dense soil is formed around the hole wall after the hole is drilled by a percussion drill, which has a certain effect on stabilizing the hole wall and improving the bearing capacity of the pile foundation. 10. Gravel pile machine In the soft soil foundation treatment methods, there is a new construction method to replace the vibro-replacement stone column, the construction technology of vibro-sinking tube compaction stone column. For the vibrating immersed tube gravel pile machine, the pile frame is hung with a vibrating hammer, which is started by the motor. The immersed tube is vibrated into the soil by the vibrating force of the vibrating hammer. After reaching the standard height, the concrete is poured. (There is a feeding port on the immersed tube, and the feeding hopper is lifted by the winch of the pile machine.) While pouring, the tube is pulled out by vibration, and the concrete is vibrated and compacted to the elevation. As a large pile driver, the vibrating immersed tube gravel pile driver has several types, such as walking tube type, walking type and crawler type, and its power is commonly known as 60, 75, 90, 110, 120 and even 150 types. The model shall be selected according to the pile diameter, pile length and geological conditions required by the design. Vibratory sinking tube gravel compaction pile has been widely used in soft soil foundation treatment because of its simple equipment, convenient operation, low cost,
DHD Drill bit, fast construction and no pollution. Finally, let's put a few videos of pile driver construction, which is more straightforward: END Source: Baidu Library Push Return to Sohu to see more Responsible Editor:.
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