The document discusses tunnel boring machines (TBMs) and their use in tunnel construction. It describes some of the key components of a TBM, including the tunnel lining process using precast concrete segments. It also discusses the importance of surveying activities to guide TBM operations and transfer control stations. Geotechnical considerations like rock quality designation are important for TBM tunneling. The main types of TBMs covered are slurry shield and earth pressure balance machines. Annulus grouts and mortars are also discussed for bonding segments and preventing issues during tunneling.

1. By
VISHAL KUMAR SINGH
1CR12CV057
Guided by:
Vibha N. Dalawai

2. CONTENTS
 Introduction
 Objective
 Major construction of TBM
 Tunnel lining
 Surveying
 Geotechnical consideration
 Different types of TBM
 Annulus grouts & Mortars
 References

3. INTRODUCTION
 First tunneling shield by Sir Marc Isambard
Brunel to excavate under the Thames in 1825.
 Actual boring machine built-in 1845 by Henri-
Joseph Maus

4. OBJECTIVES
 To give an understanding of what is a
TBM.
 To build up an awareness of the wide
variety of perils TBMs are exposed to.
 Role of civil engineers in this machine
tunneling work.
 How we utilizes our geotechnical and
survey knowledge.

5. MAJOR COMPONENTS OF
TBM

6. TUNNEL LINING
 5 segments and 1 key segment, each 1.2 and
1.5 m long and 275 mm thick.
 The segments were precast with M50 grade
concrete at the casting yard

7. SURVEYING
 After doing general survey i.e. identifying
geographical extent of the construction work,
reconnaissance survey, establishing new
survey stations from known control stations.
 Computation of global coordinates of control
stations are performed
 Secondary control station established for TBM
launching shaft at surface & then transfer that
to tunnel control station at underground level

11. GEOTECHNICAL
CONSIDERATION
Rock-quality designation (RQD) is a rough
measure of the degree of jointing or fracture
in a rock mass, measured as a percentage of
the drill core in lengths of 10 cm or more.
High-quality rock has an RQD of more than
75%, low quality of less than 50%.

12. DIFFERENT TYPES OF TBM
 1. SLURRY SHIELD TBM

13. slurry test programmed will generally include the above parameters[ 2]

14.  2. Earth pressure balance TBM

15. indicates typical particle size distributions for the use of EPBM[ 3 ]

16. ANNULUS GROUTS &
MORTARS
 To prevent flotation and heave
 To prevent surface subsidence
 To prevent misalignment of the segment rings
 To bond the soil and segments into a single
component

18. REFERENCES
 1).To my training, which I did in tunneling, on the metro site of Delhi, which was under
construction under Shanghai Urban Construction Group (SUCG), joint venture with L&T.
 2). Andrew Hung Shing Lee, “ENGINEERING SURVEY SYSTEM FOR TBM (Tunnel
Boring Machine TUNNEL CONSTRUCTION)”, Hong Kong ISBN 978-56-56-65-55
 3). Kolymbass, 2005 “TUNNELING & TUNNEL MECHANICS”, 2005, ISBN 456-23-
59-20-12
 4). “A GENERAL OVERVIEW ON TUNNEL BORING MACHINES” By Prof. jian
ZHAQ, rock mechanics and tunnelling. UK ISBN 111-419-23-45-71-83
 M. Cigla, S. Yagiz & l.Ozdemir,"APPLICATION OF TUNNEL BORING MACHINES IN

19. THANK YOU