Modul deskripsi inti bor dan pemetaan permukaan

1. DESKRIPSI INTI BOR
DAN PEMETAAN PERMUKAAN
MODUL D

2. Tujuan
 Mendapatkan data untuk
karakterisasi massa
batuan

3. Lingkup Pembahasan
 Deskripsi inti bor
 Pemetaan Permukaan

4. Sistem Klasifikasi
 RMR system (Bieniawski, 1989)
 SMR (Romana, 1985)
 Geological Strength Index (Hoek, 1994)

5. Deskripsi inti bor
GEOTECHNICAL DRILLING REPORT BORE HOLE NO. :
PROJECT :
INCLINATION : AZIMUTH :
Company name and symbol: From to Φ Meth. LOCATION : TOTAL DEPTH : MACHINE :
COORDINATE X : START : FINISH :
Y : LOGGED BY :
SHEET : ______OF______ Z : Meter CHEKED BY : DATE :
(1) (2) (3) (4) (5) (6) (7) (8) (10) (11) (12) (13) (14) (15) (16) (17) (18) (19) (20) (21) (22) (23) (24)
Date
From
To
Length
Corelentgh
Recovery
From
To
From
To
UCS
Tot>=10cm
RQD
Frequency
Spacing
Roughness
Weathering
From
To
Lab.Test
(m) (m) (m) (cm) (%) (m) (m) (m) (m) (cm) (%) (cm) (m) (m) (m)
SampleCode
RECOVERY MATERIAL DESCRIPTION STRENGTH RQD
Gouge(infill)
WaterLevel
SAMPLINGDISCONTINUITY INFORMATION
METHOD
DRILLING
(9)
Lithology

6. RMR system (Bieniawski,1989)

7. Recovery
%100x
runcoreoflengthTotal
eredcovReLengthCore
erycovRe 
%100x
150
130
erycovRe 
%87
150cm
L = 20 cm
No pieces ≥ 10cm
L = 20 cm
No recovery

8. Strength
STRENGTH CODE TERM FIELD ESTIMATE OF STRENGTH
>250 Mpa R6 Extremely Strong
Specimen can only be chipped with a geological
hammer.
100 - 250 Mpa R5 Very Strong
Specimen requires many blows of a geological
hammer to fracture it.
50 - 100 Mpa R4 Strong
Specimen requires more than one blow of a geological
hammer to fracture it.
25 - 50 Mpa R3 Medium Strong
Cannot be scrapped or peeled with a pocket knife,
specimen can be fractured with a single blow from a
geological hammer.
5 - 25 Mpa R2 Weak
Can be peeled with a pocket knife with difficulty,
shallow indentation made by firm blow with point of a
geological hammer.
1 - 5 Mpa R1 Very Weak
Crumbles under firm blows with point of geological
hammer, can be peeled by a pocket knife.
0.25 - 1 Mpa R0 Extremely Weak Indented by thumbnail.

9. RQD
%100x
runcoreoflengthTotal
cm10LengthCore
RQD
 

%100x
150
110
RQD 
%73
150cm
L = 20 cm
No pieces ≥ 10cm
L = 20 cm
No recovery

10. Discontinuity Information
(Spacing)
150cm
L = 20 cm
No pieces ≥ 10cm
L = 20 cm
No recovery
%100x
frequencyFracture
runcoreoflengthTotal
Spacing 
%100x
7
150
Spacing 
mm280cm28 

11. Discontinuity Information
 Persistence (length)
 Separation (aperture)
 Roughness
 Infilling (gouge)
 Weathering

12. Discontinuity Information
(Weathering)
TERM CODE DEFINITION
Decomposed/
Completely
Weathered
D
The rock is totally discolored and decomposed and in a
friable condition. The external appearance si that of soil.
Highly Weathered HW
Discoloration extends throughout the rock, and the rock is
partly friable. The original texture of the rock has mainly
been preserved, but separation of the grains has occurred
Moderately
Weathered
MW
Slight discoloration extends from discontinuity planes for
greater than 20% of discontinuity spacing. Discontinuities
may contain filling of altered material. Partial opening of
grain boundaries may be observed.
Slightly Weathered SW
Discontinuities are stained or discolored and may contain a
thin filling of altered material. Discoloration may extend into
the rock from discontinuity surfaces to a distance of to 20%
of the discontinuity spacing.
Unweathered UW
No visible signs of weathering are noted : rock fresh ; crystal
bright

13. Sampling
CODE KIND of LAB. TESTING
PP Physical Properties
UCS Uniaxial Compressive Strength
DX Direct Shear Strength
PLI Point Load
TX Triaxial Strength
SV Sonic Velocity
SL Slake Durability
BH = Bore Hole
ROTO = Nama Pit/daerah “ROTO”
01 = Bor Geoteknik No. 1
(3) = sampel No.3
T=Top, B=Bottom

14. Pemetaan Permukaan
ROCK TYPE Coordinates X : Y : Z :
Name of Project :
Location :
BENCH Conducted by : Date :
Checked by : Date :
company name and symbol : No. of Photograph : Slope Orientation (Dip Direction/Dip):
CODE/VALUE RATING CODE/VALUE RATING GSI (1)
1. Strength of intact rock 2. RQD
3. Spacing of Discontinuities 5. Groundwater Condition
A. RATING (1+2+3+5) = B. RATING(1+2+3) +15 =
CODE/VALUE RATING CODE/VALUE RATING CODE/VALUE RATING CODE/VALUE RATING
a) Length (persistence)
b) Separation (aperture)
c) Roughness
d) Infilling (gouge)
e) Weathering
Joint Orientation (DD/D)
C. RATING (a+b+c+d+e) =
F. GSI (2) = E + (-5)
*) SET 1 is joint with the highest fracture frequency
E. Basic RMR '89 (Dry)= B+C
RMR and GSI Calculation
SKETCH
PARAMETER
D. Basic RMR '89 = A+C
Parameter
PARAMETER
4. Condition of Discontinuities
GEOTECHNICAL MAPPING
SET 1*) SET 2 SET 3 SET 4Joint set

15. Geological Strength Index (GSI)

16. Geological Strength Index (GSI)

17. Geological Strength Index (GSI)

18. Geological Strength Index (GSI)

19. Geological Strength Index (GSI)

20. TERIMA KASIH