I. The document discusses the proposed construction of a hydroelectricity project at Chanju District in Chamba, Himachal Pradesh. II. It outlines the history and necessity of the project, noting power demands are increasing and hydroelectric projects in the region are important. III. Details are provided on proposals for the project, including construction of a barrage site and several tunnels (ADITs) of varying lengths, as well as a power house and steel support structures (ribs).

1. CONSTRUCTION OF
HYDROELECTRICITY PROJECT AT
CHANJU
DISTT. CHAMBA
( HIMACHAL PRADESH)

2. HISTORY AND NECESSITY
HISTORY:-
I A ENERGY is a sister concern branch of GOEL Group of Companies. I A Energy means INDO
ARYA ENERGY. It was built in 2002 in Shimla (H.P.). I A ENERGY CHANJU – I HEP 36 MW was
the first project allotted to this company in the year 2005. It was allotted by former C.M. of
Himachal Pradesh (Raja Virbhadar Singh).
NECESSITY:-
I. From the growth of peak demand and anticipated installed generation capacity , it is
observed that power supply position in the Northern region would become all the more acute .
II. The most important source of power development in the Northern region is its abundant hydro
resources located in Himachal Pradesh, Uttar Pradesh, Uttranchal and Jammu & Kashmir.
Chamba Hydro-electric Project is considered very attractive from point of view of deriving benefits
during 11 th Five Year Plan

3. PROPOSALS
I. Construction of one barrage site having
HEIGHT : 16.00 m
WIDTH : 3.00 m
HEAD : 234.00 m
II. Construction of ADIT-I, ADIT-II, ADIT-III, AVC,
ADIT-IV .
III. Construction of Power House , H.R.T.

4. ADIT-I :-
LENGTH : 60.58m
WIDTH : 4.00m
HEIGHT : 4.20m
START EL. : 1430.042m
END EL. : 1427.80m
EASTING : 19407.493
NORTHING : 20594.025

5. ADIT-II :-
LENGTH : 341.739m
WIDTH : 4.00m
HEIGHT : 4.20m
START EL. : 1447.31m
END EL. : 1418.96m
EASTING : 19404.493
NORTHING : 20596.025

6. ADIT III :-
LENGTH : 530.108m
WIDTH : 4.00m
HEIGHT : 4.20m
START EL. : 1451.31m
END EL. : 1406.96m
EASTING : 18627.493
NORTHING : 21351.025

7. ADIT- IV :-
LENGTH : 299m
WIDTH : 4.00m
HEIGHT : 4.20m
START EL. : 1217.31m
END EL. : 1195.96m
EASTING : 19404.493
NORTHING : 20596.025

8. “RIBS” :-
It is a steel structure provided at the start of
tunnel.These are generally provided to
prevent loose rock material from falling
directly on the working point. It is of D-
shaped and is made up of I-section beam.
Tie rods are generally used to connect Ribs.
Concrete mix M-20 is used for backfilling of
Ribs.

9. CONSTRUCTION OF TUNNELS IN STEPS
• I. PROFILING
• II. DRILLING
• III. LOADING( EXPLOSIVES)
• IV. BLASTING
• V. DEFUMING
• VI. MUKING
• VII. POOLING

10. DRILLING IN PROGRESS

11. SHOTCRETE
1. It is concrete conveyed through a hose and pneumatically
projected at high velocity onto a surface, as a construction
technique. Shotcrete is usually an all-inclusive term that can be
used for both wet-mix and dry-mix versions.
2. Shotcrete undergoes placement and compaction at the same
time due to the force with which it is projected from the nozzle. It
can be impacted onto any type or shape of surface, including
vertical or overhead areas.

13. WETCRETE
• It is concrete conveyed through a hose and pneumatically projected at high velocity onto
a surface, as a construction technique.
• In Wetcrete, water is added at the time of preparing mix.

14. WETCRETE IN PROGRESS

15. ROCK BOLTING
1. A rock bolt is a long anchor bolt, for stabilizing rock excavations,
which may be used in tunnels or rock cuts. It transfers load from
the unstable exterior, to the confined (and much stronger) interior
of the rock mass.
2. Cement Capsule and Resin Capsule are used during rock
bolting.

16. Roc-203 doing rockbolting Rock Bolts shown in fig.

17. RETAINING WALL / BREAST WALL
Breast wall is constructed to protect sloping ground from the cutting actions of
weathering agents.The following salient points are note worthy :-
I. Because of increase of earth pressure with the depth of fill the section of breast
wall increase from top to bottom.Generally the back of wall is stepped while the face
is kept vertical or inclined
II. Breast wall are some time provided with batter on both side .
III. Sufficient numbers of weep holes are provided all along the length as well as
height of the wall to drain off gravitational water of earth fill general rule is to provide
atleast one weep hole for 3 sq m. of the surface .
IV. As a thumb rule the thickness of wall at any depth h below the fill level may be
kept between 0.33 h to 0.4 h depending upon the condition of filled material

18. RETAINING WALL / BREAST WALL

19. WEEPHOLES
Sufficient numbers of weep holes are provided all along
the length as well as height of the wall to drain off
gravitational water of earth fill.
General rule is to provide atleast one weep hole for 3 sq
m. of the surface

20. WEEPHOLES

21. TOTAL STATION
A Total Station is an electronic/optical instrument used in
modern surveying. The total station is an electronic
theodolite (transit) integrated with an electronic distance
meter (EDM) to read slope distances from the instrument
to a particular point.

22. APPLICATION OF TOTAL STATION
I. Coordinates of unknown point relative to a known coordinates can be determined.
II. Angles and distances are measured
using total station.
iii. These are primary surveying device
used in mining survey.