Diaphragm wall is a new technology rapidly developed on the basis of foundation construction engineering and underground hidden engineering, because the wall is cast as a whole, has the characteristics of high structural rigidity, strong integrity, high seepage performance, long durability, small impact on the surrounding foundation, less environmental impact on the adjacent structures and wide range of adaptability to the substrate, etc., it has been widely used in the urban rail transit, water conservancy and reservoirs, port construction, municipal engineering, bridges, high-rise buildings and other engineering projects. The double-wheel milling machine is a special equipment used for processing underground diaphragm wall, through the milling wheel cutting and crushing the rock layer, and then through the reverse cycle of slagging, forming the required groove.

Based on this, the milling wheel as the core structure of the double-wheel milling machine, not only affects the construction efficiency of the double-wheel milling machine, the milling wheel on the milling tooth arrangement and the type of milling teeth also has a direct impact on the milling wheel’s stratigraphic adaptation range. For example: for medium weathered, slightly weathered and other very hard rock, the general use of tooth wheel hobbing teeth for crushing rock; for sand, pebble layer, weathered rock and hard rock strata, the general use of truncated milling teeth for point impact crushing; and for the soil, small pebble layer, sand, weathered rock layer and part of the hard rock, it is generally used in the standard teeth milling teeth for cutting and breaking the rock.

However, in the two-wheel milling machine for longitudinal milling into slots, rarely a single stratum, generally through a variety of strata, resulting in the construction of often need to change according to the stratum changes to replace different types of milling wheels or replacement of different types of milling wheels with different types of milling wheels of the two-wheeled milling machine, in order to ensure the safety of milling process. However, frequent replacement of milling wheels or double-wheeled milling machine undoubtedly increases the time of removing and replacing the milling wheels and moving the machine, which indirectly increases the construction cost.