The applicable engineering of the milling and excavating machine

Writer： admin Time：2022-12-12 23:02:13 Browse：290℃

The milling machine can be installed on any type of hydraulic excavator, effectively replacing buckets, breaking hammers, hydraulic shears and other general configurations, and is widely used in excavation of tunnels, canals, municipal pipelines; road pavement crushing; mining, excavation of frozen rocks ; Excavation of open-pit coal mines; new developments in the steel industry, new developments in the steel industry, forestry and other construction fields.

Main applicable projects:   Tunnel construction. Excavation project at the bottom of embankment. Artificial steep slope excavation project. Iron tower foundation project. Underground wall stripping project. Coral stone excavation project. Weak foundation improvement project. Work. Contaminated land improvement works. Asphalt stripping works. Quarry works. Building demolition works. Water excavation works. Canal expansion works.

Application ranges of milling machine:

1. In most cases, the milling machine is only used for the excavation of the tunnel contour, but in the formation suitable for low hardness rock formation and frozen soil layer, the milling machine can be directly used for tunnel excavation, especially in the process of fracture excavation, The formation disturbance is low. In the crushed rock formation and old loess, the excavation volume can reach 30-60m3/h.

2. The milling and excavating machine is especially suitable for areas that are not suitable for blasting construction; the milling and excavating machine is easy to operate, highly controllable, and the excavation contour is clear and accurate; the milling and excavating machine can easily solve the problem of under-excavation in the tunnel. Excavation of side ditches etc.

3. Excavation: On-site excavation is generally divided into two steps, that is, two steps. Because all equipment needs to be stored on the steps, the distance between the upper and lower steps is 800-1100m. Step-by-step excavation and support: After excavation, steel mesh and steel grid spray-mixed support are used to support the tunnel. In soft rock, the depth of excavation per excavation depends on the rock formation on the palm and the pre-design of the tunnel design unit, generally 50~80cm.

4. Excavation cycle: After excavating with a milling excavator, the excavator takes out the surface of the palm and stops on the surface of the tunnel, and then the loader starts chirping. After chirping, immediately install the support structure. Spraying work, and then proceed to the next cycle of excavation construction.

5. Solve the problem of excavation that has just been supported: the excavation rate of the milling machine in clay (taking a milling machine of 30 tons as an example) is about 30~60m3/h. Milling machine chooses intelligent manufacturing appearance. When using a milling machine to excavate in the clay layer, the cutter head is wrapped in clay and cannot be used. You can clean the cutter head with water or use a milling machine to cut some dry and hard surrounding rock.

Other applications of milling machines:

Milling machines are ideal for excavation, rock and concrete wall simulation, tunneling, quarrying, demolition, dredging, finishing and underwater operations. They are very effective where traditional excavation systems are too weak and crushing systems are nearly ineffective. Its quiet operation allows them to work near sensitive areas (residential areas, hospitals, schools, bridges and infrastructure). Highly recommended for high precision, minimal impact and finishing operations.

Milling machines are remarkably effective in removing milled foundations in buildings. Concrete slabs, thick concrete walls with little reinforcement. It can realize the double function of hydraulic breaker and hydraulic tongs, because it can mill steel bars in buildings at the same time. The milled material has a small particle size and can be directly used as backfill.

The milling machine is very effective in mining operations in the following rock formations: – low hardness rock formations – weathered rock formations – high hardness but layered structures with a milling capacity of 80-120 tons per hour (depending on the rock formation hardness) It replaces blasting construction and protects the environment.

Other more functional milling, asphalt concrete and cement concrete pavements can replace expensive road milling machines, while deep milling jobs can be done where road milling machine malfunctions and require quality milling machines to create a large façade. In the on-site operation of road embankment, the milling and excavating machine can effectively remove obstacles such as rock strata, reinforced concrete, hard soil, frozen soil, and tree roots encountered during construction.