Post on 24-Oct-2014
transcript
1
MODERN TRENDS IN TUNNELS
FOR HYDRO POWER PROJECTS
Presented By
P.K. SOOD
Executive Director
Dr. Hutarew & Partner (I) Pvt. Ltd.
2
TYPICAL DETAILS OF HORSE SHOE TUNNEL
PORTAL
3
TYPICAL DETAILS FOR HORSE SHOE
TUNNEL THROUGH SOUND ROCK
4
TYPICAL DETAILS FOR HORSE SHOE
TUNNELS THROUGH FAIR ROCK
5
TYPICAL DETAILS FOR HORSE SHOE TUNNEL
THROUGH HIGHLY JOINTED ROCK
6
TYPICAL DETAILS FOR HORSE SHOE TUNNEL
THROUGH MODERATELY JOINTED ROCK
7
TYPICAL DETAILS OF HORSE SHOE
TUNNEL THROUGH POOR ROCK
8
BACK FILL GROUTING DETAILS FOR
HORSE SHOE TUNNELS
9
TYPICAL DETAILS OF CIRCULAR TUNNEL
THROUGH SOUND ROCK
10
TYPICAL DETAILS FOR CIRCULAR TUNNEL
THROUGH HIGHLY JOINTED / POOR ROCK
11
TYPICAL DETAILS OF CIRCULAR TUNNEL
THROUGH MODERATELY JOINTED ROCK
12
TYPICAL D-SHAPED TUNNEL
CROSS SECTION
13
TYPICAL DETAILS FOR D-SHAPED TUNNEL
THROUGH MODERATELY JOINTED ROCK
14
TYPICAL DETAILS FOR D-SHAPED TUNNEL
THROUGH HIGHLY JOINTED ROCK
15
LONGITUDINAL SECTION OF D-SHAPED
TUNNEL
16
TYPICAL DETAILS OF STEEL RIBS WITH
TIMBER BLOCKING
17
LONGITUDINAL SECTION AT TRANSITION
FROM D-SHAPE TO CIRCULAR TUNNEL
18
GENERAL LAYOUT PLAN SHOWING
TRANSITION DETAILS
19
FIRST SECTION AT TRANSITION FROM D-SHAPE
TO CIRCULAR TUNNEL
20
SECOND STAGE SECTIONAL DETAILS AT
TRANSITION (D-SHAPE TO CIRCULAR)
21
THIRD STAGE SECTIONAL DETAILS AT
TRANSITION (D-SHAPE TO CIRCULAR)
22
FOURTH STAGE SECTIONAL DETAILS AT
TRANSITION (D-SHAPE TO CIRCULAR)
23
FIFTH STAGE SECTIONAL DETAILS AT
TRANSITION (D-SHAPE TO CIRCULAR)
24
FINAL STAGE SECTIONAL DETAILS AT
TRANSITION (D-SHAPE TO CIRCULAR)
25
TYPICAL DETAILS OF ROCK BOLTS
26
TYPICAL DETAILS OF ROCK BOLTS WITH
100 MM THICK SHOTCRETE
27
TYPICAL DETAILS OF ROCK BOLTS WITH
50 MM THICK SHOTCRETE
28
TYPICAL DETAILS FOR STEEL SUPPORTS
29
TYPICAL DETAILS OF SUPPORT JOINTS
30
31
32
33
34
35
36
37
THANK YOU !!!
UNDERGROUND POWER
STATIONS
SOME GEOTECHNICAL
PROBLEMS ENCOUNTERED
PRESENTED BY:
P. K. SOOD
EXECUTIVE DIRECTOR
DR. HUTAREW & PARTNER (INDIA) PVT. LTD.
CONTENTS
• CHUKHA H. E. PROJECT (Bhutan)
• SANJAY H. E. PROJECT
(Himachal Pradesh)
• KADAMPARAI PUMP STORAGE
SCHEME (Tamil Nadu)
CONCLUSIONS • In view of the presence of various joints,
foliation, shear and thrust zones, seepage wateretc., the formation of unstable wedges whichcould drop down from the roof or side walls ofthe underground caverns, cannot be ruled out oravoided altogether. As much geologicalinformation as possible should be obtainedbeforehand and possibility of formation of allwedge mechanisms must be carefully examined.A well designed system of rock supportconsisting of rock bolts and shotcrete should beprovided. To avoid the possibility of rock slips ofthe type encountered at Kadamparai, safe andcontrolled blasting techniques should beevolved beforehand to suit the requirements ofstrata encountered.
THANK YOU !