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parametric study of soil abrasivity for predicting wear issue in tbm tunneling projects

by:Gewinn     2019-09-05
At present, there is a lack of reliable methods to evaluate soil wear and reveal the effects of different parameters on wear rate, which is considered to be a deficiency in geotechnical investigation in feasibility studies, the design and construction stage of the tunneling project using the tunneling rig (TBM).
This issue has recently attracted wide attention and attention from the international community.
The background of existing standard test methods is reviewed, and the appearance of wear types in tunnel tunneling is discussed.
A new soil wear test system, called the soil wear test chamber (SATC)
The results of the soil wear test were compared with the commonly used test results, such as: Cerchar, LCPC and SAT tests.
The use of the new device takes into account some of the most important influencing factors, including the presence of water, bentonite slurry, soil particle size, quartz content, water pressure and enclosure pressure.
The test results show that the wear resistance of the soil tends to increase with the increase of soil particle size, bentonite slurry, soil pressure and quartz content.
For different types of soil, the effect of water on the grinding is different.
As the water pressure increases, the grinding properties of the soil are reduced.
Internal friction does not appear to have any effect on the rate of wear measured with the newly proposed device.
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