Earth pressure balance shield machine (EPB Shield TBM)：
In different regions and cities, the construction environment is different. Especially in cities in South China, Southwest China and other regions, the engineering geology is varied, and the situation of soft upper part and hard lower part and local full-face hard rock is very common. The traditional shield machine can only deal with a single stratum, but it often can’t guarantee the efficient driving speed and efficiency when encountering a composite stratum. The composite earth pressure balance shield machine can not only have high efficiency in excavation speed and construction efficiency under uniform stratum, but also maintain high efficiency in complex strata such as soft upper and hard lower, pebbles and full-face hard rock.
Slurry balance shield machine (SPB Shield TBM):
The diameter of the equipment ranges from 3 meters to 18 meters, and the weight is 300-5000 tons. According to the formation conditions, the tool changing technology can be adopted at normal pressure, and the tool can be changed at normal atmospheric pressure. At the same time, it has a stable cutting surface, and the equipment adopts gas-• Liquid-balanced slurry shield machine injects slurry with high specific gravity and viscosity into excavation bin and air cushion bin to form slurry film, and then injects pressure-maintaining gas into air cushion bin to ensure the stability of tunnel face and effectively control settlement. By using air cushion chamber pressure maintaining technology and bentonite air cushion technology, the pressure in the excavation chamber and in front of the shield can be accurately controlled by using a separate air cushion chamber behind the main excavation chamber, which can accurately control the surface settlement during the operation of the shield machine.
Hard rock TBM(Hard Rock TBM):
The flat or semi-circular cutter head can be selected according to the quantity, caliber, strength and characteristics of the rock. The equipment can be divided into two types: the front crushing type in which gravel is crushed in front of the cutter head and swallowed into the soil chamber, and the swallowing type in which gravel is swallowed into the soil chamber.
In the selection of hob, the hob technology with rich application performance on TBM is adopted in hard rock stratum. At the same time, in order to prolong the life of the cutter head in the gravel layer, hobs with built-in superhard blades are adopted, which can be replaced more conveniently in the soil cabin.
Coal Mining TBM;
Specially designed for the construction environment and requirements of underground roadway in coal mine, the full-face cutterhead is used to break rock into roadway at one time, which integrates the functions of excavation, slag discharge, support, dust prevention, ventilation, guidance, explosion prevention, drilling ahead, data acquisition, ground monitoring and so on, and realizes the parallel operation of construction procedures such as excavation, support and slag discharge, which can adapt to the excavation of soft rock, hard rock, soft and hard staggered strata. Cutter heads and cutters are scientifically arranged, with excellent materials, which are suitable for complex geological conditions and long-distance excavation, with an average monthly footage of 600— — 800 meters, the highest monthly footage can reach more than 1000 meters.
Special Shape Shield TBM
The equipment can be completely customized according to the terrain and purpose. According to the size and geological conditions, it can be customized for special terrain conditions. The Apollo cutter head construction method (including all possible revolving cutter heads) can be used to dig any section which is mainly rectangular, and it is also suitable for circular or circular sections. The cutter head structure has a high-performance cutter position control mechanism to ensure high-precision cutting section.
Vertical Shaft Shield TBM:
The equipment is 7 meters to 24 meters in diameter. In the process of vertical excavation, segment support is completed at the same time, and it is formed at one time. Mainly used in underground intelligent parking lots, nonferrous metal mines, coal mines, military industries and other vertical deep tunnels, the products completely change the traditional shaft excavation method and open up a brand-new vertical shield construction method.
