Shield tail seal grease of shield excavating machine

Abstract

The invention discloses a shield tail seal grease of a shield excavating machine, which is used for passing through sand soil, rivers and lakes in the process of excavating construction of an underground project. The shield tail seal grease is combined by the following raw materials in parts by weight: 15-25 parts of plant oil, 15-25 parts of viscosity index modifying agents, 50-60 parts of stuffing, 5-10 parts of thickening agent, 0.8-1.2 parts of mildewproof agents, 0.5-1.0 part of wet dispersing agents and 2-6 parts of bamboo fibres. The seal grease has good seal performance and pumping ability and no pollution to the environment, can particularly play a favorable seal role in the sand soil or a deeper soil layer with more water content and solve the problem of easy slurry leakage or large dosage in the sand soil, which commonly exists in the grease in the current market.

Description

technical field [0001] The invention relates to a sealing grease, in particular to a shield tail sealing grease for a shield boring machine. technical background [0002] At present, with the development of domestic infrastructure, subway construction is in full swing, and tunnel shield excavation construction is in the ascendant in large and medium-sized cities in China. After the tunnel construction in the past few years, the construction technology has been greatly improved. In terms of project planning and site selection, due to the needs of urban development, more and more tunnels are deeper than the previous tunnels in terms of buried depth, and there are also more and more tunnels. More tunnels will pass through rivers and lakes of all sizes in the country. [0003] For shield tunneling construction, the soil quality encountered will become more and more complex. In the case of high moisture content and high permeability of the soil layer, the requirements for the gr...

AI Technical Summary

Problems solved by technology

[0004] At present, there are many oil manufacturers in China, but there are common problems of grout leakage and large dosage in sandy soil or crossing rivers and lakes and other poor soil conditions. For example, the dosage in general soil layer is usually 25kg / m (the diameter of the shield machine is about 6.4m), but it may use 70-80kg / m in sandy soil

However, products imported from abroad, such as those imported from France or Japan, are of high quality, but they have a problem of high cost: their price is usually twice as expensive as that of domestic shield tail sealing grease. It is 34 yuan / kg, and its dosage is not less than that of domestic shield tail sealing grease