With the frequent construction of expressway projects, the technical requirements of expressway construction are also constantly improving. Shotcrete technology is the basic condition to ensure the safety of tunnel construction, so the wet shotcrete machine is very important. In the following, we will analyze the advantages of large tunnel wet sprayingand the working principle of wet spraying technology in detail, and discuss its application and development prospect in large section long highway tunnel.
Development prospect of tunnel wet shotcrete machine
Wet spraying technology plays an important role in tunnel construction, providing initial support capacity for the whole tunnel construction and ensuring the safety of subsequent tunnel construction, especially for large section and long highway tunnels. Currently, there are three spraying techniques, which are dry spraying techniques, wet spraying techniques and damp spraying techniques. Dry spraying techniques is to mix aggregate and cement in a certain proportion, mix with high-pressure water by spraying, and spray to the rock surface at high speed; Wet shotcrete spraying machine is aggregate mixed with cement in a wet state and sprayed onto the rock surface.the process and machinery of wet spraying are the same as that of dry shotcrete machine. Due to its obvious defects, gradual elimination is inevitable. But wet spray technology has many advantages and occupies a dominant position in the market. The following will analyze the characteristics and working principle of tunnel wet spraying technology, and explain the application and future development direction of wet spraying technology.
Type and characteristics of concrete wet shotcrete machine
process
The advantages of dry spraying technology are simple, durable and low cost, but there are also many obvious defects, such as poor quality control of shotcrete, low productivity, high rebound rate during construction, high cutting loss, easy to pollute the environment, etc., which is very harmful to the health of operators. The advantages are high productivity, high quality control, no dust, low rebound rate, water cement ratio is easy to control when mixing concrete. Therefore, wet shotcrete spraying technology occupy the dominant position of tunnel concrete shotcrete technology.
Characteristics analysis of tunnel wet shotcrete machine
At present, small tunnel wet spraying machine without walking ability and telescopic boom is mostly used in tunnel construction. Although its equipment cost is low, the structure is simple, but there are low production efficiency, poor spraying effect of the shortcomings. Large tunnel wet spraying machine with telescopic boom and walking ability should be used to facilitate the construction of large section long highway tunnel. It has the advantages of fast spraying speed, high efficiency, short preparation time, wide spraying range, easy to move and so on. It can effectively improve the operation cycle speed and speed up the construction progress. The average spraying speed reaches 10 m3/h.
When wet shotcrete machine is used in construction, it not only reduces the dust concentration in the tunnel, but also improves the working environment in the tunnel and protects the health of workers. Automatic and precise addition of accelerating agent eliminates a large number of human factors and ensures the strength of concrete.
This is our Application and development prospect of tunnel wet shotcrete machine in highway tunnel, if you are interested in our products, please contact us.
