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首页> 外文期刊>Tunnelling and underground space technology >Influence of geotechnical parameters on dust potential of sulphate bearing clay-siltstone in tunnelling works
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Influence of geotechnical parameters on dust potential of sulphate bearing clay-siltstone in tunnelling works

机译：岩土地参数对隧道工程硫酸盐粘土 - 硅铁晶灰尘的影响

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摘要

Within a major tunnelling-infrastructure project in Southern Germany, the mineral anhydrite of the rock "Grabfeld Formation" (formerly "Gipskeuper") proved to be challenging with respect to the prohibition of the use of water. Due to its bulking potential (swelling) when anhydrite interacts with water (gypsum) the use of water was prohibited during the complete process of tunnelling works. This led to significant dust production while excavating. Dust poses risk to the human respiratory system and, in order to fulfil health and safety standards and provide a safe work environment, needs to be controlled. Within this task it was monitored, whether certain geotechnical parameters of a rock influence quality and quantity of dust. Additional to tests at the construction site, a laboratory program was designed.Geotechnical tests were conducted with rock material from tunnel drives in the Grabfeld Formation. An usual LCPC device was used as dust generator. A correlation between the water content and the quality and quantity of dust can be shown. However, the point load index i(s)(50) as an indicator of rock strength, showing a correlation with the water content, did not correlate with the quality and quantity of dust.
机译：在德国南部的主要隧道基础设施项目中，岩石“Grabfeld地层”（以前的“Gips展）”）被证明对禁止使用水的挑战。由于其膨胀潜力（肿胀），当残矿与水（石膏）相互作用时，在隧道工程的完整过程中禁止使用水。这导致了挖掘时的显着粉尘生产。灰尘对人类呼吸系统带来风险，并且为了满足健康和安全标准并提供安全的工作环境，需要控制。在此任务中，它被监视，无论岩石的某些岩土工程参数是否会影响灰尘的质量和数量。在施工现场进行额外测试，设计了实验室计划。使用Grabfeld地层中的隧道驱动器的岩石材料进行了地板测试。通常的LCPC设备用作灰尘发生器。可以示出水含量与灰尘的质量和量之间的相关性。然而，点载指数I（S）（50）作为岩石强度的指示，显示与水含量的相关性与灰尘的质量和数量无关。

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