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Features of cantilever tunnel boring machine

Features of cantilever tunnel boring machine

The cantilever TBM can only cut part of the tunnel section. To break the full-face rock, it is necessary to move the cutting head up and down, left and right, many times in order to complete the work. Can be used for tunnels of any cross-sectional shape.

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Working principle of double-wheel slotting machine

Working principle of double-wheel slotting machine

The milling head part of the two-wheel milling machine is equipped with a certain number of sensors for collecting data. The operator can intuitively see the working status of the two-wheel milling machine (the straightness of the milling head) through the touch screen. milling depth, milling head resistance) and operate accordingly.

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Horizontal directional drilling rig system configuration

Horizontal directional drilling rig system configuration

Drilling rig system: it is the main body of drilling operation and backdragging operation of crossing equipment. It is composed of drilling rig host, turntable, etc. The main rig is placed on the rig frame to complete drilling and towing operations. The rotary table is installed at the front end of the main machine of the drilling rig and connected with the drill pipe. By changing the turntable steering, output speed and torque, it can meet the requirements of different working conditions.

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Application of double-wheel slotting machine

Application of double-wheel slotting machine

According to the geological conditions of generally high soil strength in the whole slotting construction range of the upper Shagou station and the lining requirements of the slotting depth of the continuous wall, the milling and grasping combined construction process is adopted, that is, the ordinary hydraulic grab slotting machine in the area that cannot be drilled, first use two-wheel milling slotting machine for construction, and then combine with the ordinary hydraulic grab slotting machine to construct a thicker clay layer. According to the analysis of the geological conditions of the Upper Shagou Station, the first-class sodium bentonite [21] is mixed with mixing water to form mud for the retaining wall of the tank.

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Precautions when using rotary excavators

Precautions when using rotary excavators

Rotary drilling rig has obvious advantages in the construction of bored piles in subway engineering, strong applicability, high degree of automation, low labor intensity, high drilling efficiency, good fluff quality, and low environmental pollution. Can significantly improve the construction efficiency and engineering quality. When the construction method and construction technology are reasonably selected, the materials, financial resources, manpower and other resources can be saved to the maximum extent. For enterprise efficiency and social security has a win-win significance.

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