A flexible steel platform has a footprint of 75 feet by 75 feet and supports equipment having a total weight of 2,250 kips. The platform is located at the ground surface. The soil profile below the platform consists of 30 feet of stiff clay over bedrock. The groundwater table is located 5 feet below the ground surface. The clay has a unit weight of 120 pcf above the water table and 125 pcf below the water table. Laboratory consolidation test results for a sample of the clay at a depth of 15 feet below the ground surface reveal a preconsolidation stress of 2,400 psf, compression index of 0.5, recompression index of 0.1 and initial void ratio of 0.66. Assume the bedrock is incompressible. Part A Plot effective vertical stress versus depth (to scale) before and after installation of steel platform and equipment. Part B Calculate the primary consolidation settlement at the center of the platform and at the corner of the platform AND report the differential settlement between these two points. Do not subdivide the clay layer.

Q: Consolidation test is conducted for clay sample. Initial sample thickness of the sample H, = 20 mm…

A: Please note, experts are supposed to answer only one question at a time so please post question…

Q: 4- Consider the soil profile shown below subjected to the uniformly distributed load, Ao, on the…

A: step 1-

Q: A consolidated drained (CD) triaxial test was conducted on a granular soil. At failure the cell…

A: Given data : Deviator stress (σd)=8505 psfConfining pressure (σ3')=3150 psf

Q: A clay specimen was tested in a laboratory consolidation device, which was 25.4 mm (1 in.) thick and…

A: Given,Percentage of consolidation, U% = 90%Time of 90% consolidation, t = 2.2 hours = 2.2×60 = 132…

Q: Table 2 shows the soil profile and the relevant soil parameters and the loading parameters.…

A: Introduction : Elastic settlement occurs as a result of a change in shape at a constant volume, such…

Q: An undisturbed sample of fine sand is tested in the laboratory and found to have a dry mass of 3.23…

A:

Q: A saturated clay specimen is subjected to a pressure of 240 kN/m2. After the lapse of a time, it is…

A: step 1-

Q: At a planned construction site, a 2 m. thick stratum of normally consolidated clay underlies a…

A: Given,  2 m thick normally consolidated clay underlies 3 m thick granular layer and ground water…

Q: A consolidation test has been performed on a sample obtained from a saturated clay at a point 12m…

A: To determine is the given soil is under consolidated, normally consolidated or over consolidated.…

Q: b). An overhead water reservoir is to be constructed at KAAF campus to cater for its water problem.…

A: Given

Q: A consolidated undrained test was conducted on a clay speci- men. The consolidation and chamber…

A: From first specimen-σ1=σ3+σd

Q: The total density of sand in an embankment was found to be 1900kg/m^3 and the field water content…

A:

Q: A triaxial test is performed on a normally consolidated clay. The sample is further consolidated by…

A:

Q: The coefficient of permeability of a sand at a void ratio of 0.62 is 0.03 cm/s. Estimate the…

A:

Q: The time required for a 50% consolidation of a 25 mm thick layer (drained at both sides) in the…

A:

Q: The time required for a 50% consolidation of a 25 mm thick layer (drained at both and bottom) in the…

A:

Q: Q1:the water table in certain area is depth 4m below the surface to depth 12m .the soil consist of…

A: "Since, you have asked multiple questions, we will answer only first question according to our…

Q: The height of the sample sand to be tested = 20 cm and the height of the saturated sand = 16 cm.…

A: Given data- height of sand sample h1=20 cmheight of saturated sand sample h2=16 cmTo Find-The…

Q: 11-27. Assume the sand of Problem 11-24 is Sacramento River sand at a void ratio of 0.8. If the…

A: From the given data, Drained triaxial test σ3c'=σ3f'=500 kPa Maximum shear stress, τmax=660 kPa…

Q: The water content of a sample of saturated soil at a mean effective stress of 10 kPa is 85%. The…

A:

Q: The depth of water in a lake is 4 m. The soil at the bottom of thelake consists of sandy clay. The…

A: Given:- The depth of water in a lake = 4 m  The soil at the bottom of the lake consists of sandy…

Q: AP = 50 KPa 3 m Sand Ydry = = 16 KN/cu.m GROUND WATER TABLE Sand 6 m Ysat = 18.5 KN/cu.m Clay Ysat =…

A:

Q: A clay specimen was tested in a laboratory consolidation device, which was 12.7 mm (½ in.) thick and…

A: Given that:                       size of specimen, h = 12.7 mm                            So,…

Q: For a laboratory consolidation test on a clay specimen (drained on both sides) the following results…

A:

Q: tri-axial test was conducted on normally consolidated clay. The results were: the confining pressure…

A: We knowσ1=σ2tan245+ϕ'2+2c'tan45+ϕ2

Q: A site is underlain by a saturated clay layer with thickness = 5m. A sample extracted from the…

A:

Q: 3- A sand sample is subjected to drainage cutting test with a hollow cylinder device. Rupture occurs…

A: Solution   A)σCell/σ3=200 Kpa           σ1= 300 Kpa       drainage allowed U=0 (pore water…

Q: A clay specimen was tested in a laboratory consolidation device, which was 12.7 mm (½ in.) thick and…

A: As per our company guidelines we are supposed to answer only first 3 sub-parts. Kindly repost other…

Q: 5.00m clay overlain with a 5.00m sand. The sand has a specific gravity of 2.65 and a void ratio of…

A: Given:- Liquid limit = 60% Load = 75 KPa

Q: X A new building is planned upon the site shown below. Assume that the clay solids have a specific…

A:

Q: 4. Consider the soil profile shown in figure subjected to the uniformly distributed load, Ao = 950…

A: Given Data: H1=6 ft. H2=16 ft. H3=18 ft. Dry unit weight of sand is γd= 114 lb/ft3 Saturated unit…

Q: Q3: Answer with false or true then correct the wrong one. 1- Up to 50 % liquid limits the soils…

A: False - The plasticity nature of the soil is not determined by the liquid limit and it is determined…

Q: Sub-surface exploration at the site of a proposed building reveals the existence of a 2.4-meter-…

A: Given that:                  Depth of clay layer = 2.4mThickness of sand layer = 4mDepth of GWT…

Q: The variable (falling) head of permeability test is used for permeable soils (K< 10-4 cm/s). * Ture…

A: Introduction :  The variable head permeability test is one of various methods for determining soil…

Q: Final height of specimen (cm) Pressure, o' (kg/cm³) 1.9 0.25 1.763 0.5 1.742 1.0 1.702 2.0 1.656 4.0…

A: It is required to determine the area of specimen. A=π4×D2=π4×6.35 cm2=31.67 cm2 It is required to…

Q: A soil profile shown is subjected to a load of 48 kN/m? at the ground surface. The preconsolidation…

A: Assume LL=48  and e=1.0so,CC=0.007LL-7=0.287Find effective stress at middle of clay…

Q: For a laboratory consolidation test on a clay specimen (drained on both sides) the following results…

A:

Q: Nonrigid analyses are superior because they consider the flexural deflections inthe mat and the…

A: Rigid and Nonrigid methods are developed to design mat foundation. The Rigid method has some…

Q: eotech. engineering    A Thick layer of clay underlies a sand formation having a thickness of 4m.…

A:

Q: Three samples of Soil were collected during soil exploration for the construction of a Highrise…

A: Given Condition- Three samples of Soil were collected during soil exploration for the construction…

Q: 9.4 A clay specimen was tested in a laboratory consolidation device, which was 12.7 mm (½ in.) thick…

A:

Q: In a laboratory compression test, the void ratio changes from 1.55 to 1.36 as loading increases…

A:

Q: Resuits of a lavoratory consolidation test on a 5 meter thick clay (at a site) indicates t 50 = 12.2…

A: Given data Clay thicknessH=5 mt50=12.2 min∆=8 tons/ft2Sample heighth=1.582 cm a} For 50% Degree of…

Q: A certain saturated sand (S = 100%) has a moisture content of 25.1% and a specific gravity of solids…

A:

Q: The soil is acted upon by a uniformly distributed load P=60 kPa at the ground surface. Compute the…

A: ∆σ = 60 kpa.case 1:  σc = 200kpacase 2: σc = 230 kpa.case 3: normally consolidated.cs = cc5

Q: Results of the standard Proctor test are given below: Moisture Weight of wet soil in the mold (lb)…

A: (b) The equation for zero air void curve is given by, γd=Gγw1+wGS              ...1 Take γw=62.43…

Q: deposit of clay underlain a 4.5m thick sand. the degree of saturation of sand is 37%, the void ratio…

A:

Q: A CID TXC test was performed on a sample of sand. At the end of consolidation, the back pressure was…

A: To determine for a consolidated-drained triaxial test the: total pore water pressure at failure…

Q: 9.8 An oedometer test on a saturated clay soil gave the fol- lowing results: C. = 0.2, C, = 0.04,…

A: Given Data :-Ce=0.2Cr= 0.04OCR = 4.5w = 28%For satwraleol clay S=1∴By using equation,Se =…

Calculation of Settlement

The vertical displacement of the structural foundation due to the loading from the superstructure is known as settlement. It is due to the reduction of air voids present in the soil. The amount of vertical displacement depends on the bearing capacity of the soil on which the foundation is laid. The effect of the settlement depends on the magnitude of settlement, uniformity, and the structural design of the structure. The maximum allowable settlement for residential and office buildings should be less than 18 mm, for industrial buildings, it is 38 mm and for commercial buildings, it is 25 mm.