Reveal the secret! Besides shield machines, what other ＂big guys＂ are there on the construction site of Jinan Metro Line 2？

Qilu Net Lightning News November 30 th　Subway construction is a big project, and there are countless professional equipments needed. I believe everyone is familiar with the shield machine, but there are more large equipments that are also playing a big role. Every time many citizens pass by the construction site of Line 2, they will be attracted by those tall construction equipments. "What are their names? What is the role? " Today, Xiaobian will show their business cards for everyone: Please invite several members of the large-scale equipment family of Jinan Metro Line 2 to make their debut!　

1. Double-wheel slotting machine

Working principle: The hydraulic motor provides powerful torque for the grab bucket, and the cutting of the rock stratum of the continuous wall trough section is completed through the rotation of the milling wheel, and then the cut gravel is removed from the trough bottom through the mud separation system, thus completing the trough construction of the continuous wall trough section.

Function: In view of the deep rock-socketed stratum, assist the groove grab machine to complete the groove-forming construction of the rock-socketed part.

Advantages: high degree of mechanization, fast groove forming speed, good quality, and low vibration and noise during construction.

Two-wheel slotting machine is used in the construction of Line 2, which is the first time that this equipment has appeared in Shandong municipal engineering.

Working principle: The grab bucket is provided with a strong opening force by the hydraulic cylinder, and the muck at the bottom of the continuous wall trough section is excavated and grabbed after repeated opening and closing, and then lifted into the soil bucket of the ground muck truck, and the trough construction of the continuous wall trough section is completed through repeated grabbing.

Function: To complete the trench construction of underground continuous wall and provide a trench with certain length, width and height for continuous wall pouring.

Advantages: high degree of mechanization, fast groove forming speed, good quality, and low vibration and noise during construction.

Working principle: There is a cutting knife at the lower part of the drilling rig, and the cut soil rises along the spiral blades on the drill pipe and is discharged from the ground. The soil is continuously cut and taken, and the concrete (or mud) is pumped into the ground through the central pipe of the drill pipe to form a pile.

Function: it is mostly used in the construction of rotary jet grouting pile for foundation pit retaining structure, and plays a role in stopping water and supporting when combined with bored piles.

Advantages: the overall structure of the long spiral drilling machine is not complicated, and it can continuously cut and borrow soil, with high hole-forming efficiency.

Working principle: similar to shield machine, that is, the jacked pipeline starts from the originating well and is jacked into the working well under the action of the main roof.

Function: Cutting the whole section of the passage, jacking segments to complete the passage construction, which is mostly used for the construction of crossing entrances and large pipe corridors.

Advantages: high space utilization rate, no impact on road traffic, low noise during construction and little environmental impact.

Working principle: the pile foundation is constructed to a certain depth by using the flexibility of the drill pipe, and the hole-forming construction is completed by using the drill bit to continuously borrow soil.

Function: In the construction of retaining piles, provide holes with certain diameter and depth for concrete pouring of pile foundation.

Advantages: wide adaptability, fast hole-forming speed, various drilling tools, strong maneuverability and quick transition.

Working principle: The hydraulic transmission system transmits the power of the engine to the executive elements such as hydraulic motor and hydraulic cylinder through the hydraulic pump, and pushes the boom and bucket to complete various operations.

Function: Excavation of earthwork in deep foundation pit.

Advantages: The lengthened large and small arms can reach a wider, deeper and higher working range and improve the working efficiency of construction.

Sharp tools make good work. With these "equipment", the efficiency and safety of subway construction have been better guaranteed.

In fact, there are more "equipment" and "artifacts" in the subway construction family. If you like to see them, we will introduce them one after another in the future.