A granular soil deposit is considered medium dense if the blow count of a standard penetration test is between. over 50 30-50 4-10 10-30
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- The void ratio of a soil sample is 0.79, its moisture content is 26%, and its specific gravity is 2.73. The degree of saturation of this soil sample is close to …………………… percent. Select one: a. 90 b. 60 c. 80 d. 70A technician obtained a soil porosity of 1.5. It is okay because it is possible to measure porosity values above 1. true or falseA normally consolidated soil was subjected to tri-axial test with the following data: cell pressure= 320kPa; The specimen failed when the deviator stress is 460 kPa. Compute the angle of resistance in degrees.
- Afalling-head permeability test is performed on a fine-grained soil. The soil sample has a length of 120 mm and a cross-sectional area of 600 mm2. The water in the standpipe flowing into the soil is 0.60 m above the top of the sample at the start of the test. It falls 50 mm in 30 minutes. The standpipe has a cross-sectional area of 200 mm2. (a) Make a sketch of the described conditions. (b) What is the coefficient of permeability in millimeters per second? (c) What is the coefficient of permeability in feet per minute? (d) On the basis of the calculated value for khyd, what is the probable soil type?1. In a liquid limit test, the moisture content at 10 blows was 70% and that at 100 blows was 20%. The liquid limit of the soil, is A 35% B 50% C 65% Onone of these.3. A falling head permeability test is performed on a fine gravel soil. The soil sample has a length of 120mm and cross-sectional area of 600mm?.The water in the standpipe flowing into the soil is 0.60m above the top of the sample at the start of the test. It falls 50mm in 30 min. The standpipe has a cross- sectional area of 200mm?. a. Make a sketch of the described condition. b. What is the coefficient of permeability in millimeters per second? c. What is the coefficient of permeability in feet per minute? d. On the basis of the calculated value for k, what is the probable soil type?
- A consolidated drained tri-axial test was conducted on a granular soil. At failure 3D4 the value of o for the soil is (a) 53° (b) 37° (d) 73° (c) 45°3- A sand sample is subjected to drainage cutting test with a hollow cylinder device. Rupture occurs with increasing internal pressure while external pressure is constant. At the moment of rupture, the external stress is 200 kPa and the internal stress is 300| Kilopascals - be. Internal and external radii of the sample are 40 and 60 mm. A) Obtain the angle of soil friction. B) At the moment of rupture, what is the axial stress applied to the sample?3.) A SAMPLE OF SAND HAS A RELATIVE DENSITY OF 40% N/A SOLID SPECIFIC GRAVITY OF 2.65 THE MINIMUM VOID RATIO 1 0.45 AND THE MAX VOID RATIO K 0.97. 9) DETERMINE THE VOID RATIO OF THE SAND AT RELATIVE DENSITY OF 40% b.) DENSITY OF SAND IN SATURATED CONDITION IN PCF C) IF THE SAND IS COMPACTED TO A RELATIVE DENSITY OF 65%, WHAT WILL BE THE DECREASE IN THICKNESS OF A 4FT, THICK LAYER IN FEET
- A cohesive soil sample is subjected to an unconfined compression test. The sample fails at a pressure of 3850 lb/ft2 [i.e., unconfined compressive strength lb/ft2]. Determine the soil’s cohesion.Ex Two identical soil samples (A) and (B) of a fully saturated N.C.C. were tested. Sample (A) was subjected to an unconfined compression test and failed when the deviator stress (OT-13) was (200) kN /n². Sample (B) was tested under UU conditions with a cell pressure of (300) kN/m². The pore water pressure at failure. was (200) kN/m². a) What was the pore water pressure at failure in sample (A). b) If C=o, Find (2) for this clay. (Itint. Start with soil B, and that (OJ) un= (FJ) afined). unconfinedA SAMPLE OF DRY SAND HAVING UNIT WEIGHT OF 16.50KN/m3 AND A SPECIFIC GRAVITY OF 2.70 IS PLACED IN THE RAIN. DURING THE RAIN THE VOLUME OF THE SAMPLE REMAINS CONSTANT BUT THE DEGREE OF SATURATION INCREASES TO 40% DETERMINE THE VOID RATIO IN PERCENT * DETERMINE THE WEIGHT OF THE SAMPLE AFTER BEING PLACED IN THE RAIN * THE WATER CONTENT OF THE SAMPLE AFTER BEING PLACED IN THE RAIN