Post on 31-Dec-2015
description
Why, How, and What ? Simply we will answer the
following three questions
1. Why do we evaluate the engineering properties of rock.
2. How could we evaluate the engineering properties of rock
3. What are the major outcomes of our project in term of results and conclusions.
Why ?
1.Study and evaluate general characteristics of rocks in Nablus.
2.Study and evaluate the engineering behavior of rocks under different ground conditions.
3.Determine the efficiency for the design assumptions values used in Nablus city.
Why ? (continued)
4.Saving money by assuming higher beaning capacity values
5.Scarce of researchers involved in rocks in our local area.
6.Nablus city is mountainous region, and people have to build in mountains.
Why ? (continued)
7. Act as base step for successor students to start over our work and
make good progress in rock research field
How ?Seven sites were chosen in Nablus city area as shown below.
How ? (continued) Eight samples from each site are taken under these considerations:
1.Deep of each sample.
2.Location with respect to site
3.Any needed preparations before testing
How ? (continued)
The following tests were conducted for each site:1.Specific Gravity.
2. Absorption.
3. Porosity.
4. Abrasion ( Los Anglos test ) 5. Axial load (unconfined compression test)
What ?
Test results for each site
What ? (continued) Conclusions are as follows
1.Rocks strength ranges from weak to strong with no very strong or very weak2.Majority of rocks are sedimentary with some metamorphic ones. 3.Absorption values are relatively small
Site A Tests Results
Sample ID
Test and Results
Specific Gravity
Absorption
)%(
Porosity
)%(
Average Abrasion
)%(
Axial Load
Gsb Gsa GBulk.SSD (KN/m2)
A1
A2
2.52
1.80
2.63
2.39
2.56
2.04
1.63
13.80
4.12
24.78 34
31388.8
42857.4
Site B Tests Results
Sample ID
Test and Results
Specific Gravity
Absorption
)%(
Porosity
)%(
Average Abrasion
)%(
Axial Load
Gsb Gsa GBulk.SSD (KN/m2)
B1
B2
B3
1.68
1.61
1.61
2.44
2.37
2.46
1.99
1.93
1.96
18.64
19.84
21.33
31.22
31.97
34.38
29.64 16094.67
10329.67
-----------
Site C Tests Results
Sample ID
Test and Results
Specific Gravity
Absorption
)%(
Porosity
)%(
Average Abrasion
)%(
Axial Load
Gsb Gsa GBulk.SSD (KN/m2)
C1
C2
C3
C4
1.87
2.43
2.68
2.30
2.48
2.50
2.70
2.66
2.12
2.46
2.69
2.43
13.30
1.16
0.23
5.99
24.83
2.83
0.62
13.74
30.51 39722.22
22333.33
-----------
-----------
Site D Tests Results
Sample ID
Test and Results
Specific Gravity
Absorption
)%(
Porosity
)%(
Average Abrasion
)%(
Axial Load
Gsb Gsa GBulk.SSD (KN/m2)
D1
D2
2.55
2.69
2.59
2.70
2.57
2.69
0.62
0.16
1.59
0.42
26.12 52500
13978.4
Site E Tests Results
Sample ID
Test and Results
Specific Gravity
Absorption
)%(
Porosity
)%(
Average Abrasion
)%(
Axial Load
Gsb Gsa GBulk.SSD (KN/m2)
E1
E2
E3
2.33
2.34
2.21
2.65
2.64
2.66
2.45
2.45
2.38
5.29
4.85
7.75
12.31
11.35
17.11
36 27692.31
31538.46
-----------
Site F Tests Results
Sample ID
Test and Results
Specific Gravity
Absorption
)%(
Porosity
)%(
Average Abrasion
)%(
Axial Load
Gsb Gsa GBulk.SSD (KN/m2)
F1
F2
2.68
2.49
2.71
2.56
2.69
2.52
0.34
0.99
0.91
2.48
30 28402.3
40710.0
Site G Tests Results
Sample ID
Test and Results
Specific Gravity
(gm/cm3)
Absorption
)%(
Porosity
)%(
Average Abrasion
)%(
Axial Load
Gsb Gsa GBulk.SSD (KN/m2)
G1
G2
G3
G4
2.38
2.41
2.31
2.65
2.48
2.52
2.49
2.68
2.42
2.45
2.38
2.66
1.66
1.83
3.05
0.44
3.97
4.40
7.04
1.18
25 2366.86
12747.14
-----------
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General rock testsPurpose of Test Type of Test
Strength Uniaxial Compression
Direct Shear
Triaxial Compression
Direct Tension
Brazilian Split
Point Load*
Deformability Uniaxial Compression
Triaxial Compress
Swell
Creep
Characterization Water Content
Porosity
Density (Unit Weight)
Specific Gravity
Absorption
Rebound
Sonic Velocities
Abrasion Resistance