About the TBM

What you said is mainly about the selection of shield machines, mainly for the geology, the surrounding environment of the design line and the applicability of various types of shield machines.

The above is very comprehensive. However, if you want to buy a machine, it is better to make it domestic, our company is the largest shield industry manufacturing base in China. **Cheap and easy to maintain after excavation.

Comparatively speaking, we have also cooperated with Herrenknecht in Germany and Komatsu in Japan to make machines, there is no difference in the quality of the machine, but they did it early, famous, and it is an imported machine, so it is much more expensive than our production! Most of the repairs of their domestic machines are with us! Our company China Railway, you can check it on the Internet, or ask me if you want to know more details!

EPBs typically dig up to 20 meters per day. A shield is a type of tunnel boring machine that uses the shield method. The construction method of shield is the "shield" (referring to the supporting segment) of the tunnel constructed (laid) by the roadheader at the same time as the tunneling, which is different from the open construction method.

Notes:Internationally, generalized shield machines can also be used in rock formations, but they are different from open (non-shield) tunnel boring machines. In China, it is customary to call tunnel boring machines used in soft soil formations (narrow) shield machines, and those used in rock formations (narrow) TBM.

According to the working principle, the shield machine is generally divided into hand-excavated shield, extrusion shield, semi-mechanical shield (local air pressure, global air pressure), mechanical shield (open-chest cutting shield, pneumatic shield, slurry pressurized shield, earth pressure balance shield, hybrid shield, special-shaped shield).

At normal speeds, the TBM is advancing at a rate of 9 to 10 meters per day.

The daily length of the TBM depends on the geological conditions, the type of machinery, and other factors.

Shield machine, the full name of shield tunnel boring machine, is a kind of tunnel boring special construction machinery, modern shield boring machine set light, mechanical, electrical, hydraulic, sensing, information technology in one, with excavation and cutting soil, transport ballast, assembly tunnel lining, measurement guidance and correction and other functions, involving geology, civil engineering, machinery, mechanics, hydraulics, electrical, control, measurement and other disciplines and technologies, and in accordance with different geology for "tailor-made" design and manufacturing, reliability requirements are extremely high. The shield boring machine has been widely used in subway, railway, highway, municipal, hydropower and other tunnel projects. The shield machine is mainly classified as:

Open, machine-cut,

Grid, extruded.

The so-called tunnel boring machine can actually be divided into two types, namely the open tunnel boring machine and the shield machine. Although Shizhi can be divided into two kinds, in fact, the two are fundamentally not in the same category, and cannot be compared with each other, because the shield machine is essentially a full-section roadheader, but most of the domestic believe that the former is mainly used for mountain tunnels, and the latter is mainly used for the excavation of soft soil scavenging sensitive layers, and is now often used for the excavation of urban tunnels. I hope to help you go further, for the full-section tunnel boring machine, there are two ways to talk about it in China, one is the rock boring machine (TBM), and the other is the shield machine.

TBM is a tunnel boring machine suitable for hard rock excavation, and a shield machine is a tunnel boring machine suitable for soft rock and soil.

Shield and full-section TBMs.

TBM).

In fact, the TBM and the TBM are both the same, both are full-section tunneling. It's just that different working environments use unused machinery. Their main differences are as follows:

1.The applicable projects are different, TBM is used for hard rock, and the shield machine is used for soil excavation.

2.The tunneling, balancing, and supporting systems of the two are different.

More advanced and more complex than shield technology.

4.The TBM is a hard rock boring machine, which is generally used in mountain tunnels or large-scale water diversion projects, and the shield is a soft soil roadheader, mainly in the urban subway.

and Xiaoyu bridge pipeline.

The way to move forward is that the shield machine first passes through its teeth, slowly gnaws the sediment, and gradually excavates forward, but if there is too much sediment, then the sediment will be swallowed into it and transported out through its own conveyor belt; The shield machine is a kind of tunnel boring machine using the shield method, which is a high-end equipment integrating mechanical, electrical, hydraulic, sensing, information, mechanics, guidance research and other technologies. From the cross-section, it looks like a shield, so it is called a shield machine. A shield machine is composed of a shield body and a subsequent equipment trolley.

What catches your eye is its cutterhead, which is more like the "teeth" of the shield machine. Don't underestimate its "teeth", no matter what kind of soil, it can be gnawed off little by little. After the cutterhead is the shield, which is composed of the front shield, the middle shield and the tail of the shield, all three parts of which are tubular simplified.

The shield mainly supports and protects the main bearing, hydraulic jack, cabin, grouting system, sealing system and other hydraulic, electrical, sensing and control devices of the shield machine.

Summary. This depends on the geological conditions, in Guangzhou, two project departments, the same company out of the 4-meter shield machine, one 15 20 rings per day, one 1 3 rings per day, because one has no rock, one full section rock.

If the general conditions are good, there is no problem with the 4-meter shield at 15 to 20 meters, and the 6 meters at the 10 rings, about 15 meters.

To improve efficiency, the main thing you can do is to maintain the equipment well, complete spare parts, and not frequent faults; The process connection should be good; The quality of the personnel is high, the workers are willing to work and experienced, and the management personnel must also be capable.

The rest of the objective conditions, natural factors, and external man-made factors are a lot.

How many meters the TBM excavates per day.

Hello, I am helping you to inquire about the information, please wait a while, I am looking carefully!

The 20-meter EPB typically excavates up to 20 meters per day.

This depends on the geological conditions, in Guangzhou, two project departments, the same company out of the pure virtual 4 meters shield machine, one 15 20 rings per day, do burn one sell 1 3 rings per day, because one has no rock, one full section rock. If the general conditions are good, there is no problem with the 4-meter shield at 15 to 20 meters, and the 6 meters at the 10 rings, about 15 meters. To improve efficiency, the main thing you can do is to maintain the equipment well, complete spare parts, and not frequent faults; The process connection should be good; The quality of the personnel is high, the workers are willing to work and experienced, and the management personnel must also be capable.

The rest of the objective conditions, natural factors, and external man-made factors are a lot.

Hello, TBM (TBM) and EPB are both machines used in underground tunneling, and although there are similarities in some aspects, they also have many differences. 1.It works differently:

The TBM excavates the soil by rotating the cutterhead and the propulsion mechanism, and then transports the excavated soil out of the tunnel by means of a conveyor belt or a truck. The cutterhead of the TBM can be changed or adapted to different types of soils and rocks depending on the geological conditions. The shield machine uses steel shield components that cover the inner wall of the tunnel one by one, and completes the excavation and support of the underground tunnel by combining it with the propulsion mechanism.

The steel shield components of the shield machine can be adjusted according to different geological conditions. 2.The scope of application is different:

TBMs are suitable for excavating long, large-diameter tunnels in relatively hard or moderately hard soils or rocks, such as metro tunnels and hydraulic tunnels. The EPB is more suitable for excavating small diameter tunnels in soft ground, such as soft soils, mudstone or gravelstones, such as urban underground pipelines and water conservancy and drainage pipes. 3.

The working environment is different: TBM boring machine is generally used for tunnels with deep underground or tunnels with a long excavation time, and the construction type Gaojing time is generally longer than that of the shield machine, which requires a more stable construction environment. The shield machine requires a large soil support force during the construction process, and the construction environment is generally more stable and safe than that of the TBM roadheader.

The TBM seems to be one of the types of TBMs.