The intact rock that follows the Mohr–Coulomb failure criterion has c = 15 MPa and ϕ = 27°. Estimate the uniaxial compres sive strength σc, the uniaxial tensile strength σt and the Brazilian indirect tensile strength σ′ t . Give an estimate of the point load strength index Is(50) and suggest a realistic range for the Young’s modulus E.

Q: a. Major Principal Stress in psi. b. Minor Principal Stress in psi. c. Normal Stress at Failure…

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Q: 1.  What is the increase in stress at point that is 2.5 meters beneath a corner of a 1.5 meter x 2…

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Q: Following data are given for a direct shear test conducted on dry silty sand:Specimen dimensions:…

A: The given data is shown below:

Q: Undisturbed specimens of the gouge material filling a rock joint was tested in the laboratory and…

A:

Q: 1. Fill in the blanks; (a) Theoretically, the vertical stress at surface under a point load is (b)…

A:

Q: 50 MPа On tan o

A: a) Rock will be fallen at a shear stress of 48N/mm2 and Normal stress of 44N/mm2 . b) Ʈ = C +σ tanφ…

Q: A) Show the following on Mohr's stress circle: 1-The value of direct stress in the plane of the…

A: Plotted values and labelled value that is asked in question  A is shown in next step Further plane…

Q: In a triaxial test at failure, major principal stress was 180 kPa, minor principal stress was 100…

A:

Q: A circular area on the ground surface is subjected to a uniformly distributed load, q = 2200 Ib/ft2.…

A: “Since you have asked multiple question, we will solve the first question for you. If youwant any…

Q: Question 2: Series of Consolidated Undrained (CU) Triaxial test with pore water pressure (u)…

A: A saturated soil specimen undergoes a consolidated undrained triaxial test, with pore water…

Q: 4. Biot hypothesized that the shear modulus is influenced by the presence of the pore fluid. 5. Pure…

A: Given data- A set of statements are given below- To Find- It is required to decide whether the…

Q: Problem-(5) In a triaxial compression test, the major principal stress was 90 kPa and the minor…

A: Given data- Triaxial Compression test- Major principal stress=90 kPa, Minor principal stress=30 kPa,…

Q: Q2\ Answer T for true statements or F for false ones and correct false ones: 1. Strength of rock…

A: 1. Strength of rock decreases with increasing confining pressure. Answer:- The above statement is…

Q: 13. The difference between the major and minor princi- pal stresses at a point is 70 kN/m². If the…

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Q: The effective stress friction angle of a saturated, cohesionless soil is 38°. The ratio of shear…

A: given data : Angle of internal friction (ϕ)=38∘

Q: refer to the figure due to application of line load q1 and q2 . the vertical stress increase at…

A: Given: The vertical stress is 42 kN/m2. Consider the figure,

Q: 5.1 Show, using Mohr's circle, that the depth of a tension crack is ze, = 2sY sat for a saturated…

A: This question is related to the Soil mechanics. In this question on we answered about tension crack…

Q: If the strength (failure) envelope is horizontal (parallel to the normal stress axis), what is the…

A: Mohr's failure envelope when the strength envelope is horizontal can be drawn as:The above figure…

Q: 105 КРа 30 КРа В 430 КРа 52° 75 КРа A

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Q: For a case plane stress, o = 40 MN/m², o, = 0, Txy = 80 MN/m². What are the principal stresses (in…

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Q: A 4m^2 sectional load of 100 kPa is distributed evenly on ground surface. Find the following : A.…

A: Given,area(A)=4m2Pressure=100kpaload(Q)=pressure×AreaQ=1004Q=400 KNAccording to boussinesq's…

Q: In a series of unconsolidated-undrained triaxial tests speciments of a fully saturdated clay, the…

A: To find cohesion (c) and angle of internal friction

Q: (9) Repeat question (6) but with an alternating torsional stress of 207 MPa. (Ans./ n, = 1.15, n, =…

A: calculate the Von Mises stress at the alternating range σ'a   σ'a =σ2a+3ra212  here , σa is…

Q: (d) Figure 1 shows rock samples being tested for their uniaxial compressive strength (UCS). Some…

A: Part A  Between the samples (ii) and (iii) sample (iii) will display lower strain at failure because…

Q: Evaluate the average normal stress developed on the hollow circular post shown

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Q: If both the major and minor principal stresses for a soil element are known, as well as the strength…

A: The Mohr's circle is a graphical representation of the state of stress at a point in a material. It…

Q: SITUATION 5: A sand sample is subjected to direct shear testing at it's (in - situ) water content.…

A: For the first test : σ = 400 kPaτ = 300 kPaWe know that, τ = σtanϕ + c                           300…

Q: 1. In a series of triaxial compression tests on a sandstone, the following repre- sent the stresses…

A: As per guidelines, we need to answer only 1st question.

Q: A point load of 650KN is applied on the surface of a thick layer of clay. Using Boussineq's elastic…

A: Determine vertical stress?

Q: 2- A three-axis compression test has been performed on the clay sample, which has been…

A: Given data Concentrated load, Q = 22.5 KN depth, Z = 15 m Calculate the stress intensity at a depth…

Q: Select all true statements. 1-Direct shear tests are useful to establish the Mohr-Coulomb envelope…

A: according to the question; these are the true statements; statement 1 : Direct shear tests are…

Q: Q- On the surface of a thick layered clay soil deposit, a point load of 750 kN is applied at a depth…

A: Given data: Load, Q = 750 kN Depth, z = 3.5 m Radial distance, r = 1.2 m

Q: Total stress effective stress of rock grains - pore Pressure. %3D

A: 3.Total stress at a point is defined as the sum of the stress exerted by the total weight (solids…

Q: Q4\ Match the items from list A with the suitable ones from list B: A В exceeds the tensile strength…

A: Table A and Table B are given. Various properties of Table A are matched with desirable properties…

Q: a 4 meter square sectional load of 100 kpa is distributed evenly on ground surface determine the…

A: Load is transferred from the structure to the soil by footing. The load carried by the column is…

Q: [Shear Strength] ( e). In a series of unconsolidated-undrained triaxial tests on speciments of a…

A: We can solve this problem by drrawing mohr circle and failure envelop.  The intervept made by mohr…

Q: Add the following 2D rock stress states. Use the Mohr circle to show each stress state and the…

A:

Q: A soil element is shown in Figure 3. (use equations) 130 kN/m2 35KN/m? A 30° 60 kN/m2 B 35 kN/m2…

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Q: Find the transverse rupture strength for the flexure test for a brittle material having the…

A: Given, b=50 mm t=20mm L=160 mm P=300 kg

Q: Deepening of crack surface in the rock mass is termed: is the measured distances between irregular…

A: 8} As more the discontinuity surface is decreases its strength for slipping increases 9} Deepening…

Q: the angle of internal frictional of a cohesive soil which was tested using tria-axial shear…

A:

Q: A soil specimen is subjected to tri axial test. The soil specimen is cohesion less. If the shear…

A: Normal stress = δ1 =  435KPa Shear stress = ζ = 335KPa Angle of shear resistance = ϕ = tan-1Shear…

Crack Detection

Concrete materials are meant for supporting structures, building foundations and they act as several load-bearing structures. Over time, due to environmental conditions, and based on the constituent materials used, concrete materials are subjected to a great degree of distress. Corrosion of the reinforcement bars due to chemical influences, uneven base, earthquake, drying shrinkages, and alkali-aggregate reactions are some of the reasons for concrete distress.