BFC 3013 / BFC 21303

CONFIDENTIAL

PART AQ1(a)Describe the internal layers of the earth.

(5 marks)

(b)Define tectonic plate.

(2 marks)

(c)Explain FOUR (4) evidences of the theory of tectonic plate.

(8 marks)

(d)Describe briefly the types of minerals that react with acid test.

(2 marks)

(e)Describe the method to identify mineral in laboratory.

(4 marks)

(f)Differentiate silicate and non-silicate minerals.

(4 marks)

Q2

(a)Discuss the classification of igneous rocks based on its texture

(4 marks)

(b)Describe the classification in igneous rocks based on the silica content (SiO2).

(4 marks)

(c)Evaluate the relationship between silica content, minerals and weathering rate.

(5 marks)

(d)Describe FOUR (4) major processes involved in making sedimentary clastic rocks.

(4 marks)

(e) Discuss with suitable illustrations (if needed) the differences between:

(i) Clastic and chemical sedimentary rocks

(ii) Organic sedimentary rocks and inorganic chemical sedimentary rocks(iii) Conglomerate and breccia(iv) Graded bedding and rhythmic bedding

(8 marks)

Q3

(a)Describe THREE (3) types of metamorphic and give relevant examples.

(3 marks)

(b)Explain how metamorphic textures influence the intact rock and rock mass strength.

(4 marks)

(c)Erosion is one of the important agents of removal and transportation of surficial materials which are the product of physical and chemical breakdown of rocks by process of weathering.

(i) Compare and describe the textures and properties of residual soil and transported soil.(ii) Describe THREE (3) different types of load carried by streams.

(6 marks)

(d)Explain FOUR (4) types of the environment of sediments deposition.

(4 marks)

(e)Discuss with suitable illustrations (if needed) the differences between:

(i) Weathering grade 1 and 6

(ii) Normal and reverse faults

(iii) Joint and faults

(iv) Physical weathering and chemical weathering(v) Oxidation and hydrolysis weathering

(8 marks)

Q4

(a)Rock Mechanics and Soil Mechanics are branches of Geotechnical Engineering that look at the mechanical properties and behavior of rocks and soils respectively.

(i) Explain the difference in the definitions of rock and soil.

(ii) List FOUR (4) index tests for rocks and explain the different between the index tests and the direct test.

(6 marks)

(b)Explain, with suitable illustrations (if needed) the differences between:

(i) Intact rock and rock mass(ii) UCS and JCS(iii) Resistivity and seismic refraction test

(6 marks)

(c)Discuss the electrical resistivity test on how it helps in identifying the earth materials and profile.

(5 marks)

(d)With the aid of related diagram, differentiate Rock Quality Designation (RQD) and Solid Core Recovery (SCR).

(3 marks)

(e)Ground investigations are necessary for engineering geologists to carry out in preparing their recommendations for construction work on civil engineering site.

(i) Discuss TWO (2) limitations commonly associated with a borehole investigation.

(ii) Explain why the geophysical method can be used to complement a bore hole investigation.

(5 marks)

PART B

Q5(a)Explain the rock slope failure modes and its criterion.

(4 marks)

(b)Investigations at a rock slope site gave the following information.

Height of rock slope

= 80m

Proposed slope face angle = 60

Critical discontinuity angle

= 45

Depth of tension cracks

= 3m

Unit weight of the rock

= 25 kN/m3Unit weight of water

= 9.81 kN/m3Cohesion of the discontinuity = 50 kPa

Friction angle for the discontinuity= 40

Using the information given in Figure Q5(b) for a plane failure, examine the factor of safety:

(i)When the tension crack and the slope is dry, and

(ii)When the tension crack is completely filled with water.

(7 marks)

(c)A rock cut slope has a dip direction of 180 and dip angle of 60. A discontinuity survey was conducted along the proposed cut slope and results for the discontinuity sets orientations are given in Table 1. A study of the joint sets showed that all joint surfaces had a friction angle of 30.

Table 1Joint set 1

Joint set 2

Joint set 3

Joint set 4

Joint set 5

Joint set 6

176/50

240/70

140/40

320/80

350/70

180/70

(i) Analyze the entire failure mode for both proposed rock slope as well as the criterion as an evidence using Figure Q5(c).

(8 marks)

(ii) Recommend a new and suitable rock slope dip angle in order to avoid potential any rock slope failure.

(3 marks)

(iii) Predict the consequences of the above recommendations in Q5(c)(ii).

(3 marks)

BAHAGIAN AS1(a)Terangkan lapisan dalam bumi.

(5 markah)

(b)Berikan definisi ektonik keping.

(2 markah)

(c)Jelaskan EMPAT (4) bukti yang menyokong teori tektonik

(8 markah)

(d)Terangkan secara ringkas jenis mineral yang bertindak balas dengan asid.

(2 markah)

(e)Terangkan kaedah untuk menentukan mineral di makmal.

(4 markah)

(f)Terangkan perbezaan antara mineral silikat dan mineral bukan silikat.

(4 markah)

S2

(a)Bincangkan pengelasan batuan igneus berdasarkan tekstur batuan.

(b)

(4 markah)

Jelaskan pengelasan batuan igneus berdasarkan kadungan silika (SiO2).(4 markah)

(c)Berikan penilaian hubungan diantara kandungan silika, mineral dan kadar luluhawa.

(5 markah)

(d)Jelaskan EMPAT (4) proses utama yang terlibat dalam pembentukan batuan sedimen klastik.

(4 markah)

(e)Bincangkan dengan ilustrasi yang sesuai (jika perlu) perbezaan diantara:

(i) Batuan sedimen klastik dan kimia (ii) Batuan sedimen organik dan batuan sedimen kimia tidak organik (iii) Konglomerat dan breksia(iv) Lapisan bergred dan lapisan berirama

(8 markah)

S3

(a)Terangkan TIGA (3) jenis batuan metamorf dan berikan contoh yang bersesuaian.

(3 markah)

(b)Jelaskan bagaimana tekstur batuan metamorf mempengaruhi kekuatan sampel dan jasad batuan.

(4 markah)

(c)Hakisan merupakan agen utama dalam mengalih dan mengangkut hasil luluhawa fizikal dan kimia.(i) Banding dan bincangkan tekstur dan kandungan luluhawa tanah baki dan tanah terangkut.

(ii) Terangkan TIGA (3) jenis beban berlainan yang dibawa oleh arus sungai.

(6 markah)

(d)Jelaskan EMPAT (4) jenis persekitaran pengenapan sedimen.

(3 markah)

(e)Jelaskan dengan ilustrasi (jika perlu) perbezaan diantara:

(i) Luluhawa gred 1 dan 6(ii) Sesar normal dan songsang(iii) Kekar dan sesar(iv) Luluhawa fizikal dan kimia(v) Luluhawa oksida dan hidrolisis

(8 markah)

S4

(a)Mekanik batuan dan mekanik tanah merupakan cabang kejuruteraan geoteknik yang mengkaji sifat-sifat mekanikal batuan dan tanah. i) Jelaskan perbezaan definasi antara batuan dan tanah.

ii) Senaraikan EMPAT (4) ujian indek batuan dan jelaskan perbezannya dengan ujian langsung.

(6 markah)

(b)Jelaskan dengan ilustrasi (jika perlu) perbezaan diantara:

i) Batuan utuh dan massaii) UCS dan JCS

iii) Ujian kerintangan elektrik dan seismik biasan

(6 markah)

(c) Bincangkan bagaimana ujian kerintangan elektrik dapat membantu didalam mengenal bahan bumi dan profil bumi.

(5 markah)

(d) Bincangkan dengan bantuan rajah perbezaan diantara RQD dan teras gerudi dapat.

(3 markah)

(e) Penyiasatan tapak adalah perlu sebagai ahli geologi kejuruteraan didalam menyediakan cadangan pembinaan kejuruteraan awam di tapak bina.i) Bincangkan DUA (2) kelemahan yang berkaitan dengan lubang jara.

ii) Jelaskan mengapa kaedah geofizik dapat membantu lubang jara didalam penyiasatan tapak. (5 markah)

BAHAGIAN B

S5(a)Bincangkan mod kegagalan cerun batuan dan kriterianya.

(4 markah)

(b)Penyiasatan cerun batuan memberikan maklumat seperti berikut:Tinggi cerun

= 80m

Cadangan sudut kecerunan cerun = 60

Sudut satah ketakselanjaran kritikal

= 45

Kedalaman rekahan tegangan

= 3m

Unit berat batuan

= 25 kN/m3Unit berat air = 9.81 kN/m3Jelekitan satah ketakselanjaran = 50 kPa

Sudut ricih satah ketakselanjaran = 40

Menggunakan maklumat yang diberi didalam Rajah Q5(b) kegagalan satah, analisa faktor keselamatan

i)Apabila rekahan tegangan dan cerun kering, dan

ii)Bila rekahan tegangan dan cerun sepenuhnya diisi oleh air.

(7 markah)

(c)Cerun batuan mempunyai arah kemiringan 180 dan sudut kemiringan 60. Pemetaan ketakselanjaran dilakukan di sepanjang cerun potongan dan keputusannya mendapati set ketakselanjaran adalah seperti dalam Jadual 1. Kajian dilakukan mendapati semua ketakselanjaran mempunyai sudut jelekitan 30.

Jadual 1Set 1

Set 2

Set 3

Set 4

Set 5

Set 6

176/50

240/70

140/40

320/80

350/70

180/70

(i) Analisa mod kegagalan cerun batuan dengan menyatakan kriteria sebagai bukti dengan menggunakan Rajah Q5(c).

(8 markah)

(ii) Cadangkan sudut baru cerun batuan agar dapat mengelakkan potensi kegagalan cerun batuan.

(3 markah)

(iii) Ramalkan kesan akibat daripada cadangan dalam S5(c)(ii).

(3 markah)

FINAL EXAMINATIONSEMESTER / SESSION : I / 2012/2013PROGRAMME: 3 BFF / 2 BFF

COURSE : ENGINEERING GEOLOGYCOURSE CODE : BFC 3013 / BFC 21303

Given:

FOS = cA + [W cos - U - V sin + T sin (+)] tan

W sin + V cos - T cos (+)

A = (H-Z).cosec

U = (w.Zw .(H-Z).cosec

V = (w.Zw2

FIGURE Q5 (b)

FINAL EXAMINATIONSEMESTER / SESSION : I / 2012/2013PROGRAMME: 3 BFF / 2 BFF COURSE : ENGINEERING GEOLOGYCOURSE CODE : BFC 3013 / BFC 21303

FIGURE Q5(c)

UNIVERSITI TUN HUSSEIN ONN MALAYSIA

FINAL EXAMINATION

SEMESTER I

SESSION 2012/2013

COURSE NAME:ENGINEERING GEOLOGYCOURSE CODE:BFC 3013 / BFC 21303 PROGRAMME:3 BFF / 2 BFFEXAMINATION DATE:DECEMBER / JANUARY DURATION:3 HOURSINSTRUCTION:ANSWER ANY THREE (3) QUESTIONS IN PART A AND QUESTION Q5 IN PART B

THIS QUESTION PAPER CONSISTS OF TWELVE (12) PAGES

CONFIDENTIAL

CONFIDENTIAL

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