Down-the-hole drilling rigs
The essence of down-the-hole rock drilling is to make the impactor dive into the hole during the rock drilling process to reduce the energy loss caused by the impact work transmitted by the drill rod, thereby reducing the impact of the hole depth on the rock drilling efficiency. Drilling machinery is divided into two categories: rock drills and drilling rigs. Drilling rigs are divided into open-pit drilling rigs and underground drilling rigs. In recent years, well-known foreign down-the-hole drilling rig manufacturers have launched a series of new products. The common feature of these equipment is that the degree of automation is getting higher and higher, and some functions are intelligent. The application of GPS technology in these drilling rigs realizes the automatic positioning of the boom, saves the time of on-site marking and positioning, improves the working efficiency, and enables the operator to concentrate on monitoring the progress of drilling. At the same time, more attention is paid to safety and environmental protection as well as the improvement of human-machine relationship.
Horizontal directional drilling rig
Horizontal directional drilling rig is a construction machine that lays a variety of underground public facilities (pipelines, cables, etc.) without excavating the surface of the ground. It is widely used in the laying of pipelines for water supply, electricity, telecommunications, natural gas, coal gas, oil, etc. It is suitable for sand, clay, pebbles and other conditions, and can be constructed in most non-hard rock areas in my country. Horizontal directional drilling technology is a new construction technology that combines the directional drilling technology of the petroleum industry with the traditional pipeline construction method. It has the advantages of fast construction speed, high construction accuracy and low cost. It is widely used in the laying of pipelines for water supply, coal gas, electricity, telecommunications, natural gas, oil, etc.
Positive and negative circulation drilling machine
The positive and negative circulation drilling machine is a drilling machine that uses a mud pump to suck out the mud carrying rock debris from the bottom of the hole. The positive and negative circulation drilling machine is a drilling machine that is widely used in the construction of subway foundation pits and high-rise building foundation pits. Since the hole is made by using mud wall protection, the noise is low when the hole is made.
Percussion drilling machine
The impact drilling machine is an important drilling machine for the construction of cast-in-place pile foundations. It uses the impact force of the drill bit to punch and drill holes in the rock layer. It can adapt to various geological conditions, especially drilling holes in pebble layers. The impact drilling machine has stronger adaptability than other types of drilling machines. At the same time, when the impact drilling machine is used to make holes, a dense soil layer is formed around the hole wall after the hole is made, which has a certain effect on stabilizing the hole wall and improving the bearing capacity of the pile foundation.
Crushed stone pile machine
In the soft soil foundation treatment method, a new construction method has emerged to replace the vibrating crushed stone pile, the construction process of vibrating sinking pipe compacted crushed stone pile. The vibrating pipe-sinking stone pile machine has a vibrating hammer hanging on the pile frame, which is started by an electric motor. The vibrating force of the vibrating hammer is used to vibrate the pipe into the soil. After reaching the elevation, concrete is poured (there is a feeding port on the pipe, and the feeding hopper is lifted by the winch of the pile machine). While pouring, the pipe is pulled out by vibration to make the concrete dense and pour it to the elevation. As a large-scale pile machine, the vibrating pipe-sinking stone pile machine has several types, such as walking pipe type, crawler type, and crawler type. The power is commonly known as 60, 75, 90, 110, 120 or even 150 types. The machine model is selected according to the pile diameter, pile length and geological conditions required by the design. The vibrating pipe-sinking stone pile has the characteristics of simple equipment, convenient operation, low cost, fast construction and no pollution, and is widely used in soft soil foundation treatment.