Page 12 - Building Regulation and Design Guidelines - Structural (Grey Code)

SECTION: 1 GEOTECHNICAL GUIDELINES & REGULATIONS SECTION: 1 GEOTECHNICAL GUIDELINES & REGULATIONS

INCREASING GRAIN SIZE OF PARTICULATE DEPOSITS 1.2.23 Presenting the ground or subsurface conditions and the geology of
0.002mm 0.06mm 2mm 60mm the site through the findings of the boreholes giving full details of the
Carbonate MUD (carb. clay) Carbonate SILT Carbonate SAND Carbonate GRAVEL 90 strata encountered on boreholes Logs having an accurate classification
Clayey Carbonate MUD Siliceous Carbonate Siliceous Carbonate Siliceous Carbonate
(carbonate clay) SILT SAND GRAVEL of the soils according to BS 5930:1999. The boreholes Logs must
50
Calcareous CLAY Calcareous Silica SILT Calcareous Silica SAND Calcareous Silica GRAVEL indicate the necessary figures that describing the relative density of the
10 coarsegrained-soils and the quality and the strength of rock such as:
CLAY Silica SILT Silica SAND Silica GRAVEL
CALCILUTITE(carb.mudstone) CALCISILTITE(carb.siltstone) CALCARENITE(carb.mudstone) CALCIRUDITE(carb.congl. or breccia) • Standard Penetration Test (S.P.T) with cone or without. Fig. (1.2)
90
I
N
Clayey CALCILUTITE Siliceous CALCILUTITE Siliceous CALCARENITE Siliceous CALCIRUDITE T • Water content (W.C.) for cohesive soils.
C
R
O
T
E
50 O
A
S
A
I
L

N
Calcareous CLAYSTONE Calcareous SILTSTONE Calcareous SANDSTONE Calcareous CONGOLOMERATE C • Liquid Limit (L.L.) for cohesive soils.
G

A
L
I
R
B
T
10 O
H
I
CLAYSTONE SILTSTONE SANDSTONE CONGLOMERATE or BRECCIA A • Plastic Limit (P.L.) for cohesive soils.
F
N
I
C
T
Fine grained LIMESTONE Detrital LIMESTONE 90 E
A

T
I
C
O
Fine grained Fine grained Siliceous Detrital O • Unit weight of soil ( s) above and below the ground water table.
N
N
T
Argilaceous LIMESTONE Siliceous LIMESTONE LIMESTONE Conglomeratic LIMESTONE E
N
50 Table (1.3).
T
Calcareous CLAYSTONE Calcareous SILTSTONE Calcareous SANDSTONE Calcareous CONGOLOMERATE • Sieve analysis of soils.
10
CLAYSTONE SILTSTONE SANDSTONE CONGLOMERATE or BRECCIA
• Hydrometer analysis for soils having %fines greater than 10%.
CRYSTALLINE LIME STONE or MARBLE
50 • Free Swell (F.S.) for swelling soils.
Conventional metamorphic nomenclature applies in this section • Rock Quality Designation (RQD) for rock soils. Table (1.4)
• Total and Solid Core Recovery (TCR & SCR) for rock soils. Fig. (1.3).
Approximate Uncontined Compressive Strenth (<36 to 300kn/m2) (0.3 to 12.5 MN/mn2) (12.5 to 100MN/m2) (70 to > 240MN/m2) • Unconfined Compressive Strength (UCS) for rock soils. Table (1.6)
Very soft
moderately strong
strong to
Hard to
to strong
to hard
moderately weak
extremenly strong
Point load tests on rock samples.
•
Degree of induration Non-indurated Slightly indurated Moderately indurated Highly indurated • Pressure meter test. Fig (1.4)
And other any specialized tests that may be specified in theproject
•
specification including:
Table (1.8): Carbonate Classification System - Instrumented UCS tests to measure the small local modulus
and Poisson’s ratio. Table (1.7).
1.2.19 Performing engineering analysis of field and laboratory findings. - UU and CD tri-axial compression tests on soil and weakrock,
including instrumented tests for local modulus determination.
1.2.20 The visual description of the geotechnical engineer at site for soil Table (1.7).
samplesand procedures used for sampling, transportation and storage.
- Consolidation tests on cohesive soils.
1.2.21 Method of sampling the undisturbed, Split Spoon (for SPT) for disturbed
samples. Fig. (1.2). - Collapse potential tests on upper sand within the upper zone
of un-saturation.
1.2.22 Tabulation of quantities of field and laboratory work, presentation of
fieldobservations which were made by the supervising field personnel - Borehole Log must confirm scale, sample key, legend for type
during the subsurface explorations. of soil, ends of stratum and ground water table level.
22 23