کتاب Recommendations for Face Support Pressure Calculations for Shield Tunnelling in Soft Ground

Name: Recommendations for Face Support Pressure Calculations for Shield Tunnelling in Soft Ground
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Author: Zdenek Zizka and Markus Thewes

نویسنده:

Zdenek Zizka and Markus Thewes

ناشر:

Deutscher Ausschuss für unterirdisches Bauen e. V. (DAUB)

تعداد صفحه:

۶۴

زبان نوشتار:

انگلیسی

سال انتشار:

۲۰۱۶

معرفی کتاب Recommendations for Face Support Pressure Calculations for Shield Tunnelling in Soft Ground

This document aims to offer a guide to the methods for tunnel face stability assessment in mechanized tunnelling and to provide a best practice guideline for face support pressure calculations. Furthermore, the document intends to help with the choice between available calculation methods depending on the expected ground conditions.
This document consists of seven chapters in total, excluding introduction. The second chapter introduces the general aim of a tunnel face stability assessment and briefly describes soft ground mechanized tunnelling technology with a focus on the tunnel face stability. The German safety concept regarding the face stability assessment is outlined in the third chapter. Following this, the most important scientific approaches dealing with face stability calculations are discussed, in chapter 4 focusing on support pressure due to earth pressure at the tunnel face and in chapter 5 summarizing support pressure due to groundwater pressure. The most relevant calculation methods for shield tunnelling practice are presented in detail in chapter 6. Additional aspects regarding face stability are discussed in chapter 7. Two examples of face support pressure calculations are provided at the end of this document in chapter 8.
This document is intended to be applied to mechanized tunnelling projects in soft ground; hence, the document neither covers the face stability assessment of tunnels in any type of intact or fractured rock nor conventionally excavated tunnels. Due to the variability of ground conditions, this document should not be taken as a strict guideline of required calculations, methodologies and safety concepts to be adopted. Experienced engineering judgement is still required on a case to case basis. Moreover, diverse experiences exist regarding the face stability assessment among the international tunnelling community.

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