EGB373-TUT 11-Week 12 - Shear Strength of Soils-3 - Questions

Solve part c only

R is 100

Solve part a only

Question 2 The result presented in Table Q2a were obtained from a consolidated drained (CD) triaxial test on a normally consolidated clay sample of 75mm height x 38mm diameter tested at a confining pressure of 50 kPa. Table Q2a. CD triaxial test result Axial strain (%) 1 2 5 10 15 Applied force (kN) 0.01 0.03 0.05 0.08 0.10 Page 3 of 6 (a) Draw the Mohr circle for each stress state in the sample and the total stress path (TSP) throughout the test and determine the slope of the TSP to the horizontal.

‹ample 9.1: Following results were recorded from a consolidation test on a specime turated clay, each load being maintained constant for 24 hours before the addition o ext increment.

Two consolidated-undrained (CU) triaxial tests are carried out on a sample of saturated overconsolidated clay. Table Q2 lists the main results at failure. 2. Table Q2: Results from CU triaxial test Minor principal total stress 03 [kPa] 30 Test No Axial load Pore water pressure [N] 450 [kPa] 10 Test 1 Test 2 60 700 20 (a) Based on the results in Table Q2, calculate the following total and effective principal stresses at failure: 01, o'1, o'3 in kPa. For the calculation, consider a constant cross-sectional area of the sample of 100 cm?. 8 mark (b) Draw the two Mohr Circles at failure and the failure envelope for Test 1 and Test 2. [10 mas (c) Compute the relevant effective strength parameters obtained from Test 1 and Test 2.

A CU triaxial test was carried out on a silty clay that was isotopically consolidated using a cell pressure of 125 kPa. The following data were obtained: Axial load (kPa) 0 5.5 11.0 24.5 28.5 35.0 50.5 85.0 105.0 120.8 Axial strain, &₁ (%) 0 0.05 0.12 0.29 0.38 0.56 1.08 2.43 4.02 9.15 Au (kPa) 0 4.0 8.6 19.1 29.3 34.8 41.0 49.7 55.8 59.0 (a) Plot the deviatoric stress vs. axial strain and excess porewater pressure vs. axial strain, respectively. (b) Determine the undrained shear strength (sµ). (Note: we assume that the sample reaches failure). (c) Determine the total principal stresses (0₁,03) and the effective principal stresses (0₁, 03') at the failure, respectively.

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Three samples of Soil were collected during soil exploration for the construction of a Highrise Building. a) Choose the most appropriate Test to determine shear strength parameters for each of the sample described as under i) Saturated Plastic Clay ii) Well Graded Sand iii) Silty Clay b) Draw typical graph between shear stress and normal stress for each of the sample described as above.

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plz, solve what you have been asked in this problem, plz, solve all the parts of the problem?   Geotechnical Engineering-2   1. In a consolidated drained triaxial test, a specimen of saturated sand failed under an deviator stress of 250 kN/m2, when the cell pressure was 100 kN/m2   i)Solve for the shear stress on the failure plane and maximum shear stress at failure?   ii)Solve for factor of safety with respect to shear strength on the plane of maximum shear stress?  ii) Illustrate by drawing the Mohr circle for the failure stress condition. iv)Solve for ɸ′ and the theoretical inclination of the failure plane to the horizontal.

Q1: A clay specimen was tested in a laboratory consolidation device, which was 12.7 mm thick and the top & bottom boundaries were drained. A 50% consolidation time on the specimen was obtained as 28.4 minutes, Determine the Following: a- The time for 50% consolidation in the field with a 2.5 m thickness where ‘only the top layer is drained. b- The time for 90% consolidation in the field with a 2.5 m thickness where only the top layer is drained. c- For the same field condition above, find the settlement after 1year, if the final consolidation settlement = 0.0345 m.

Please answer all questions based on the scenario Question #1:                                                  Considering the water upstream of the dam, a) What will be the seepage loss of that water downstream per year? b) What will the uplift force be on the dam? Question #2: What would the stress in the center of the dam be at the middle of the bottom layer? Consider both the overburden pressure and that due to the loading. Question #3: A sieve analysis was performed on a sample of the top layer of the soil, with the results shown below:   Sieve Size (in.)   1/2   3/8 No. 4 No. 8 No. 16 No. 30 No. 40 No. 50 No. 100 No. 200   pan Amount retained (g) 0 0 21.6 39.5 77.6 102.6 89.1 95.6 90.6 60.4 33.3 Do the following: a) Calculate the percent retained and percent passing each sieve, and graph the results on a semi-log graph (you may use the attached chart, or graph in Excel and include with your submission). Then, characterize…

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Note# Honorable expert teacher kindly solve each and every step of the Q#1 as soon as possible, its urgent for today..i will be very thankful to u for this kind favor. Course; is Geotechnical Engineering-II. ( Department; Civil engineering department )

Q14 Please provide justified answer asap

Subject : Geotechnical Engineering  Read the question carefully and give me right solution according to the question.  If you don't know the solution please leave it

k Il.pdf 1C:/Users/YONAST%20TSIGHE/Downloads/BYG504%20G%20Geoteknikk%20|l.pdf Water content of a saturated soil sample A at a mean effective stress of 50 kPa is 85%. Under a standard CD test, sample A was iso-tropically consolidated to a mean effective stress of 400 kPa, the water content was 65% at the end of the consolidation. It was then iso- tropically unloaded to a mean effective stress of 300 kPa, its water content increased by 1%. a) Calculate 2 and K, and try to draw the initial yield surface and critical state line in a p', q coordinate if o'cs= 30°; if a standard CD test was continued by keeping the o: and o: pressure constant while increasing the axial stress ơi, predict stresses p'y and qy at initial yielding, and its elastic volumetric strain and plastic volumetric strain. b) After this initial yield, a stress path Ag/Ap=2 is continued in a drained condition, predict the volumetric elastic and plastic strain increment when mean stress p' was increased by 50 kPa along this…

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find the initial void ratio

4.15 The following results were obtained from a liquid limit test on a clay using the Casagrande cup device. Number of blows 6 12 20 28 32 Water content (%) 52.5 47.1 43.2 38.6 37.0 (а) Determine the liquid limit of this clay. (b) If the natural water content is 38% and the plastic limit is 23%, calculate the liquidity index. (c) Do you expect a brittle type of failure for this soil? Justify your answer.

Compare the final settlement magnitude of the soil samples in the two scenarios explained below between time t1 and time t2. Note: The answer must include a short explanation of the reason too. 1) The soil sample is compacted and subjected to one-dimensional consolidation loading under 200 kPa. After completion of the consolidation stage, it is unloaded and consolidated to 10 kPa (time=ti). Afterwards, the axial stress on the soil is increased to 200 kPa (time=t2). 2) The soil sample is consolidated under 10 kPa (time=ti), 50 kPa, 100 kPa and finally 200 kPa (time=t2).

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In order to determine the coefficient of permeability of a clay soil, which method is suitable, constant-head test or falling-head test? Why?