DESKRIPSI TANAH DAN BATUAN

Abdulrahman AlhabshiIntroduction to Soil Mechanics

Significance of this ClassCivil Engineering - Texas Tech UniversityWhy do you need to learn about soils?Almost all structures are either constructed of soil, supported on soil, or both.

Who must be concerned with soils?Civil engineers (structural, environmental and geotechnical) must have basic understanding of the soil properties in order to use them effectively in construction.

Transcosna Grain Elevator, CanadaOct. 18, 1913Civil Engineering - Texas Tech University

West side of foundation sank 24-ft3

SettlementCivil Engineering - Texas Tech University

Palacio de las Bellas, Artes, Mexico CityLeaning Tower, Pisa4

Shear Failure Slope StabilityCivil Engineering - Texas Tech University

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Soil Properties

Soil classificationGeotechnical engineeringStructural engineeringPavement engineeringEnvironmental engineeringGeotechnical engineeringStructural engineeringPavement engineering

(Partially weathered parent material)B HorizonA HorizonC HorizonSoil forming in granitic bedrock.

PROFIL TANAH

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Consistency or relative densityFabric or fissuring Colour Subsidiary constituents Angularity or grading of principal soil type PRINCIPAL SOIL TYPE (in capital)More detailed comments on constituents or fabric(geological origin, if known) (in brackets); andSoil classification symbol (optional)DESKRIPSI TANAHBS : 5930;1981

Deskripsi tanahVery stiff fissured dark grey CLAY (London Clay)(a) (b) ( c ) (f) (h)Loose brown very sandy subangular coarse GRAVEL (a) ( c ) (d) (e) (f)

with pockets of soft grey clay(g)Contoh ;Firm laminated brown SILT and CLAY(a) (b) ( c ) (f) (f)

DESKRIPSI BATUANBS : 5930;1981ColourGrain sizeTexture, and structureWeathered stateROCK NAMEEstimated strength of the rock materialOther terms indicating special engineering characteristics

Aturan Penilaian1. Tugas Mingguan = 35 %2. Tugas besar = 35 %3. Ujian tulis = 30%

Comparison of the principal methods of description of intact rockDESCRIPTIONANON (1970)ANON (1972)BS 5930 (1981)ColourGrain sizeTexture and structureWeathered stateAlteration stateCementation stateMinor lithological characteristicsMineral typeROCK NAMEEstimated strengthOther characteristics and propertiesXXXXXXXXXXxXXXXX

X

XXxXXXX

XXX

Systematic rock material description(i)(ii)(iii)(a)(b)(c )(d)

(e)

(f)(g)(h) Light pinkish grey Coarse-grained Porphyritic, massive Slightly weathered Slightly kaolinized

GRANITE Very strong Impermeable except along joints

Light yellowish brown Fine-grained Thickly bedded Fresh

Weakly cemented Ferruginous QUARTZ SANDSTONE Weak Porous Light pinkish white Medium-grained Foliated Fresh

With bands of dark coloured biotite with preferred orientation GNEISS Very strong

POSITIVISMEMetode Kuantitatif Hasil Riset dan Development