An Early-Warning System to Validate the Soil Profile during TBM Tunnelling
نویسندگان
چکیده
Identification of soil condition at the working face a tunnel boring machine (TBM) is key factor for efficiency and safety TBM tunneling. The paper presents first application Horizontal-to-Vertical Spectral Ratio (HVSR) method on microtremors induced by during tunnelling. innovative based development an easy-to-use economical early-warning system, which aims to confirm, or otherwise, profile established in design phase tunnels comparing natural frequencies obtained from carried out coming HVSR analysis Just one two geophones are necessary use proposed procedure. It can be applied area up about 20 m ahead excavation front constitutes powerful early warning system. Due great heterogeneity subsoil, dual-mode TBMs often used, frequently changing Open-Face (OF) mode rock formations Earth Pressure Balance (EPB) cohesive incoherent soil. Any “additional” information soil, will dug next days hours extremely useful subsoil with heterogeneity. new procedure offers reasonable time interval modify method. This, turn, avoid damage existing structures infrastructures. allows us also have valuable geotechnical database future works infrastructural networks. has been successfully construction underground lines Catania (Italy).
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ژورنال
عنوان ژورنال: Geosciences
سال: 2022
ISSN: ['2076-3263']
DOI: https://doi.org/10.3390/geosciences12030113