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Boreholes and tist pits.pdf
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BH-01Sheet 1 of 4
30
8. APPENDIX B
8.1: Bore hole logs and Test pit logs
38 NIL
FIELD BOREHOLE LOG Borehole No. 01
1170856.769 N 3091270.931 E
30
Bed Rock: Quartz, mica schist of little whitish, greenish & grayish in color along with brownish
Overburden: Strata is coarse gravels of igneous and metamorphic origin, fine to medium in grain size & milky white, greenish & grayish in color
RQ
D %
General Description. SOIL: Name, Type, Colour,
Consistency, Structur, Origin- ROCK: Name, Colour,
Grain size, Texture and Fabric state of
weathering,State of Shear zone, Thickness, Filling
material
NIL19
0
1
Cor
e R
ecov
ery
%
Dep
th (m
)
2
1
2
SHIGO KAS HYDROPOWER PROJECT
Depth of bedrock:1.5 mProject: Shigo Kas HPP
Thic
knes
s (m
)/Run
No.
Lege
nd
Weir Site (Left Bank)
Dril
ling
Flui
d Lo
ss %
Cor
e B
arre
l/Bit
53
30
35
73
4965
38 NIL
4
6
patches encountered here. Strata is very poor in characterization and is of very fine grain size.
5
30
3
35
Strata is same as above but in lower part of run, fragmented core
recovered, whitish in color has more quartz content than in above strata.
Same as above.
Same as above.
94 67
Schistose igneous with more quartz recovered here. Whitish and grayish in
color. Strata is fine grained and of good strength.
Micauous schist of little grayish/whitish and dominantly greenish color
encountered here. Quartz content is very low. Strata is fine in grain size.
10
100 75
25
209 7
7
8
5
6
3
4
40
2
NIL
10 110
-
BH-01Sheet 2 of 4
Weir Site (Left Bank)
SHIGO KAS HYDROPOWER PROJECTFIELD BOREHOLE LOG
72 20 Same as in above section.
9 100 44 30 Same lithology as in above section.
8 78
11
12
13
General Description. SOIL: Name, Type, Colour,
Consistency, Structur, Origin- ROCK: Name,
Colour, Grain size, Texture and Fabric state of
weathering,State of Shear zone, Thickness, Filling
material
Lege
nd
Dep
th (m
)
Thic
knes
s (m
)/Run
No.
Cor
e R
ecov
ery
%
RQ
D %
Dril
ling
Flui
d Lo
ss %
Cor
e B
arre
l/Bit
Project: Shigo Kas HPP
86 47 Quartz mica schist with little bit gneissic effect encountered here.
20
11 88
12 95 53
17
18
70 25
30 Same as above.
1510
16
Same as above.
19
14
30
111
-
BH-01Sheet 3 of 4
Project: Shigo Kas HPP Weir Site (Left Bank)
99 85 20
20
14
Same as in above section.13 95 7321
22
23
General Description. SOIL: Name, Type,
Colour, Consistency, Structure, Origin- ROCK: Name, Colour,
Grain size, Texture and Fabric state of
weathering,State of Shear zone, Thickness,
Filling material
Dep
th (m
)
Thic
knes
s (m
)/Run
No.
Cor
e R
ecov
ery
%
RQ
D %
Dril
ling
Flui
d Lo
ss %
FIELD BOREHOLE LOGSHIGO KAS HYDROPOWER PROJECT
Cor
e B
arre
l/Bit
Lege
nd
Strata is Schistose Gneiss Quartz and mica are major
components here as well. This lithology continuous till 26.5 m.
97 77 20
From 26.5 m, strata is quartz, mica schist again with same features as in the different
sections above.
2015 93 72
63 20
19 96 79 30
Strata is Quartz-Mica Schist along with some patches which show gneissic behavior. These
patches are encountered at different depths and only
18 96
99
25
26
30
27
28
29
24
16 48 30
17
112
-
BH-01Sheet 4 of 4
36
37
38
39
40
33
34
35
General Description. SOIL: Name, Type,
Colour, Consistency, Structur, Origin-
ROCK: Name, Colour, Grain size, Texture and
Fabric state of weathering,State of Shear zone, Thickness, Filling
material
Lege
nd
Dep
th (m
)
Thic
knes
s (m
)/Run
No.
Cor
e R
ecov
ery
%
RQ
D %
Dril
ling
Flui
d Lo
ss %
Cor
e B
arre
l/Bit
Shigo Kas HPP Location:
33 20
21 81 77
Project:
Besides this, there are some pure green patches of Micaous
schist and having almost no quartz or in very low quality.
These Mica schists patches were at depth from 32.7 to 33.7 m, 29
to 29.5 m and 27 to 27.5 m)
31
32
FIELD BOREHOLE LOGWeir Site (Left Bank)
20
30
67
SHIGO KAS HYDROPOWER PROJECT
BOTTOM OF BORE HOLE
113
-
BH-03Sheet 1 of 3
FIELD BOREHOLE LOG
30 NIL 25
4 15
NIL NIL 30
10
3
Fine to coarse grained sand of grayish color alongwith fine to coarse gravels of
igneous and metamorphic origin
2 32 NIL 25Medium to coarse gravels of igneous and
metamorphic origin, fine to medium in grain size and of varigated colors
recovered here
1170817.678 N
Cor
e R
ecov
ery
%
Dep
th (m
)
Thic
knes
s (m
)/Run
No.
3
2
1
Location: G.W.Depth 0.2
Project: Shigo Kas HPP
Cor
e B
arre
l/Bit
0
3091249.956 E
4
5 9 88
1
General Description. SOIL: Name, Type, Colour,
Consistency, Structur, Origin- ROCK: Name, Colour,
Grain size, Texture and Fabric state of
weathering,State of Shear zone, Thickness, Filling
material
Lege
nd
Bed Rock: At depth of 2.9 m, strata is Quartz, Mica Schist, fine in grain size,
light grey & whitish color with little effect of gneisses as well.
RQ
D %
Dril
ling
Flui
d Lo
ss %
92 51
SHIGO KAS HYDROPOWER PROJECTBorehole 03
River BedBed Rock Depth 2.9
10
7 95 40 15
10
9 8 74 48
5 95 885
6
Strata is schistose genesis i.e. more gneissic in features and appearance with same quartz and mica content
and fine in grain size and grayish and whitish in color
7
8
90
6 1093
10
114
-
BH-03Sheet 2 of 3
809
11 92 70 5
FIELD BOREHOLE LOGShigo Kas HPP Location: Project: River Bed
62 5
Quartz-Mica Schist of same sort and properties as described
above in Run No. 4. At the depth between (13.5-14.2) m, green patch of mica encountered.
Some gneissic features are also prominent, which are developed at sand on depths. Strength of
the rock varies and is represented by the RQD value of
10 90
Dep
th (m
)
Thic
knes
s (m
)/Run
No.
Cor
e R
ecov
ery
%
RQ
D %
Dril
ling
Flui
d Lo
ss %
Cor
e B
arre
l/Bit
11
12
13
14
15
1053
SHIGO KAS HYDROPOWER PROJECT
General Description. SOIL: Name, Type,
Colour, Consistency, Structur, Origin-
ROCK: Name, Colour, Grain size, Texture and
Fabric state of weathering,State of Shear zone, Thickness, Filling
material
Lege
nd
15
12 50 11 15
the runs.
17
18
16
8 20
14 70
13 50
20
3319
115
-
BH-03Sheet 3 of 3
640
NIL 20
18 93 93 5
17
RQ
D %
Dril
ling
Flui
d Lo
ss %
Project: Shigo Kas HPP Location:
15 80 43 5
23C
ore
Bar
rel/B
it
Lege
nd
24
Dep
th (m
)
Thic
knes
s (m
)/Run
No.
Cor
e R
ecov
ery
%
General Description. SOIL: Name, Type,
Colour, Consistency, Structur, Origin-
ROCK: Name, Colour, Grain size, Texture and
Fabric state of weathering,State of Shear zone, Thickness, Filling
material
21
22 16 90 67 5
48
G.W.Depth 0.23091249.956 E1170817.678 N Bed Rock Depth 2.9
SHIGO KAS HYDROPOWER PROJECTFIELD BOREHOLE LOG Borehole No. 03
28
29
19 90 75
27
20
22 80 64 5
100 40 10
21 76
25
26
30
45 10
5
116
-
Sheet 1 of 1
Location:
Coordinates G.W.EL. 1.52 m
Consultants:
1
All four walls of the test pit are
showing same properties of
lithology. Composite sample has been taken for
the required laboratory tests.
The material excavated from
the Pit is representative of
the material
0.4
0.6
0.8
From 0 to 0.2 m material is sandy, gravely silt of light brownish in colour. Gravels are of igneous and metamorphic origin. From 0.2 to the bottom
of the pit, the material is boulders and gravels alongwith sandy clayey silt. Boulders are of greyish dominantly as well as brownish in colour. They
are approximately 60 to 70% of total volume of the material in this section. Boulders are rounded to sub rounded and are of igneous and
metamorphic origin. Boulders are randomly distributed throughout in this section in all the walls.
1.0
Lege
nd Grain Size (cm) Consistency
0.0
0.2
20 -
60
> 60
Soft
Firm
Stif
f
N: 1171260 E:3091069
Unit in meter
Dep
th (m
)
Elev
atio
n (m
)
Cla
ssifi
catio
n
Sy
mbo
l
DESCRIPTION OF MATERIAL
FDT
No.
Sam
ple
Type
/ N
o.
Remarks
< 6
6 - 2
0
05-05-2013 05-05-13 Logged By:
PROJECT'S NAME SHIGO KAS HYDROPOWER PROJECT
Client: PHYDO Electra Consultants
Jan Muhammad
TP-01
Project: Shigo Kas HPP
G.Elevation
TESTPIT LOG Testpit No.
645.59 Final Depth:
Date from:
Upstream of Weir Site from 450 M Left Bank
-
the material observed in the
walls of pit.
1.6
1.8
2.0
1.2
1.4
BOTTOM OF TESTPIT
117
-
Sheet 1 of 1
Location:
Coordinates 3090186 G.W.EL. 1.43 m
Consultants:
1
All four walls of the test pit are
showing same properties of
lithology. Composite sample has been taken for
the required laboratory tests.
The material excavated from
the Pit is representative of
the material observed in the
0.4
0.6
0.8
Stif
f
1.0
Lege
nd Grain Size (cm)
0.0
0.2
Silty sand/sandy silt, little brownish but dominantly greyish in colour is observed from top to 0.35 m. Sand is mostly medium grained and dry. From 0.35 m to 1.43 m, gravels and sub-rounded to rounded, boulders
alongwith silty sand/sandy silt has been observed. Boulders and gravels are of igneous and metamorphic origin, having different sizes and
colours. The overall conditions of the pit walls are dry. Biggest boulders observed is of size 0.65x0.45 m approximately.
Boulders with sandy gravels. Boulders are more than 50% along all the walls of testpit. At left wall a big boulder is present greater than 0.6X1m. Sand is fine to medium grained with coarse concretion. Gravels grain
size are medium to coarse grained. Over all colour of material is brownish, light greyish. Highly weathered boulders are dominant at base.
Sam
ple
Type
/ N
o.
20 -
60
> 60
Soft
Unit in meter
Dep
th (m
)
Elev
atio
n (m
)
Cla
ssifi
catio
n
Sy
mbo
l
DESCRIPTION OF MATERIAL
FDT
No.
Logged By:
N: 1171558 E:
PROJECT'S NAME SHIGO KAS HYDROPOWER PROJECT
Remarks
Consistency
Firm
G.Elevation
< 6
6 - 2
0
Client: PHYDO Electra Consultants
Jan Muhammad
TP-05
Project: Shigo Kas HPP
06-05-2013 06-05-13
TESTPIT LOG Testpit No.
652.13 Final Depth:
Date from:
Borrow Area U/S of Weir
-
observed in the walls of pit.
BOTTOM OF TESTPIT1.6
1.8
2.0
1.2
1.4
Walls of the testpits were collapsed due to loose sandy material. and boulders are randomly distributed along all the walls.
118
BH-01BH-01 2BH-01 3BH-01 4BH-03BH-03 2BH-03 3TP-01TP-05