2. Data from an oedometer test (consolidation test), which was conducted on a clay sample collected from a site wherea building is proposed, are given below.(a) Calculate the change in void ratios (Ae), and the void ratios (e), filling the table given below.(b) Plot e-log curve and determine C. (compression index), C, (swell index), and o'e (pre-consolidationpressure).Given: Initial sample thickness, Ho 20 mm, G,- 2.65, dry mass of specimen after the test,Ms= 120 g, diameter of the specimen, D= 70 mm.Stress (o')(kPa)AH (mm)H (mm)H, (mm)Ae240.021480.0250.050961920.2033840.6867681.23815361.7783841.638961.457241.3070.750.700.650.600.55Void Ratio CVLE351 Soil MechanicsLaboratory Assignment 2 (due 30 December 2021)1. DIRECT SHEAR TEST (DST)(a) Explain the test procedure briefly and sketch the test set up.(b) The following readings were taken in two sets of tests (under normal load N= 390 Nand N2= 750 N) using a shear box of 60 mm x 60 mm in cross-sectional areacontaining a specimen of dry sand:i. Plot the vertical displacement against the horizontal displacementii. Plot the shearing resistance against hprizontal displacementiii. Determine the peak (o'peak) and critical state (o'er) angle of internal frictions.iv. Explain what is dilatancy and determine the angle of dilation (w) in both tests.TEST 1NormalLoadP 390 NHorizontalT (kN)t (kPa)Vertical displacementdisplacement(mm)0.(mm)0.1615-0.0302.0.258-0.02030.2910.1404.0.2760.3485.0.2390.4376.0.2325TEST 20.462NormalLoad

Answered: Image /qna-images/answer/3608a2ea-9d32-408e-98bc-8b216cd64d8f.jpg

2. Data from an oedometer test (consolidation test), which was conducted on a clay sample collected from a site where a building is proposed, are given below. (a) Calculate the change in void ratios (Ae), and the void ratios (e), filling the table given below. (b) Plot e-log curve and determine C. (compression index), C, (swell index), and o'e (pre-consolidation pressure). Given: Initial sample thickness, Ho 20 mm, G,= 2.65, dry mass of specimen after the test, Ms= 120 g, diameter of the specimen, D= 70 mm. Stress (o') (kPa) AH (mm) H (mm) H, (mm) Ae 24 0.021 48 0.025 96 0.050 192 0.203 384 0.686 768 1.238 1536 1.778 384 1.638 96 1.457 24 1.307 0.75 0.70 0.65 0.60 0.55 Void Ratio

2. Data from an oedometer test (consolidation test), which was conducted on a clay sample collected from a site where a building is proposed, are given below. (a) Calculate the change in void ratios (Ae), and the void ratios (e), filling the table given below. (b) Plot e-log curve and determine C. (compression index), C, (swell index), and o'e (pre-consolidation pressure). Given: Initial sample thickness, Ho 20 mm, G,= 2.65, dry mass of specimen after the test, Ms= 120 g, diameter of the specimen, D= 70 mm. Stress (o') (kPa) AH (mm) H (mm) H, (mm) Ae 24 0.021 48 0.025 96 0.050 192 0.203 384 0.686 768 1.238 1536 1.778 384 1.638 96 1.457 24 1.307 0.75 0.70 0.65 0.60 0.55 Void Ratio

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter3: Natural Soil Deposits And Subsoil Exploration

Section: Chapter Questions

Problem 3.19P

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