(a) A pit of 6.4 m deep is to be excavated in a fine sand stratum completely saturated up to the ground surface. The saturated unit weight of the sand was obtained as 20.3 kN/m3. To stabilize the bottom of the excavation (pr o stabilize the bottom of the excavation (prevent boiling), it was decided to drive steel sheet piles to act as cutoff walls that encircle the excavation. decided to drive steel sheet piles to act as cutoff walls that encircle the excavation. Determine the total length of sheet pile wall to provide a factor of safety of 1.5 against sand boiling. Assume specific gravity of soil, against sand boiling. Assume specific gravity of soil, Gs= 2.7 and unit weight of water, γw = 9.81 kN/m3

Q: settlement of the clay layer due to placing of fill material will be

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Q: when the primary consolidation ends B. The soil from a borrow area is excavated and used in a…

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Q: The soil profile at a construction site is shown in the figure (not to scale). Ground water table…

A: Answer  We know that the over-consolidation ratio is given by OCR = σc'σ' σc'= pre-consolidation…

Q: The soil profile at a construction site is shown in the figure (not to scale). Ground water table…

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Q: A hole was made in a stiff saturated soil having a Gs = 2.71 and moisture content of 0.30. The sand…

A: Given Gs = 2.71 w = 0.3 Water level in the hole is 6.3 m

Q: A 2m thick coal seam at a depth of 150m below ground surface is planned for extraction using 5.0m…

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Q: For rectangular grit removal chamber in a W.W.T.P if hourly flow equals 5000 m^3, DT=1 min. and…

A: GivenQ=5000m3 per hourDT=1min=160hrFind volume:V=Q×DT=5000m3hr×160hr=83.333m3

Q: A) Only adding a wide surface load of great pressure (e.g. embankment). B) Only drilling a vertical…

A: To Determine: The following separate, unrelated actions cause consolidation settlement in the clay…

Q: The lower sand layer in the soil profile shown below is in an artesian condition. Calculate: 2 a)…

A: Given data : It is a multipart problem from Soil Engineering/Mechanics or Geotechnical Engineering.…

Q: (c) A clay layer of 10 m thick with an average bulk unit weight y = 18.5 kN/m³ overlies a sand…

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Q: underlying the clay was under artesian An exploratory drill hole was made in a 32%. It was observed…

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Q: Exploratory drill hole 12m 8m 4.5 m An exploratory drill hole was made in a stiff saturated clay…

A: Given data: w=22%Gs=2.16 water table is 8m above the sand layer.

Q: Q2: For the soil profile and a) Final consolidation settlement. b) Time required for the settlement…

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Q: Q2) Triaxial un drained tests were performed on clay samples taken from stratum shown below, the…

A: Given:- The triaxial undrained tests were performed on clay samples The results of the tests are:-…

Q: system primar e followings 50 kN/m? а) о — 150 kРа Sand Yt = 18.7 kN/m3 5 m b) o = 175 kPa c) o =…

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Q: An exploratory drill hole was made in a stiff saturated clay having a moisture content of 38.9% and…

A: Given, w=38.9%Gs=2.34H=20fth=13.8 m

Q: fill is to be placed over the following soil profile shown below. Determine if the clay is normally…

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Q: A surcharge of 100 kPa is applied over a large area above the soil profile shown in the figure…

A: A surcharge of 100 kPa is applied over a large area above the soil profile shown in the figure…

Q: an open excavation is to be made in the clay, how deep can the excavation Water in the drill hole…

A: ASKED: To determine the depth of excavation before heaving occurs.   Given, Thickness of the clay…

Q: exploratory drill hole was made in a stiff saturated clay (Gs = 2.72, and w = 35%). The sand layer…

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Q: A large area of 2-m high fill is placed on a normally-consolidated homogeneous sedimentary clay for…

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Q: I profile at a constru GWT) is at 5 m bela und water table wa

A: over consolidation ratio (OCR) is given by the ratio of pre-consolidation pressure to present…

Q: An exploratory drill hole was made in a stiff saturated clay (see Figure 9.9). The sand layer…

A: Solution given next step

Q: For the one-dimensional consolidation test result shown .in Figure below, determine my

A: The flow of fluid includes movement of an unbalanced fluid. As long as unequalled forces are in…

Q: A deposit of silty clay is being considered for use in constructing a containment dyke. Vane shear…

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Q: For the shown profile, find i . the final consolidation settlement, ii . consolidation settlement…

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Q: g. how do you remove the sediment from the borehole?

A: This question has been taken from geo technical engineering

Q: Q.3 For the shown profile, estimate the consolidation settlement using three different Fill (3m, Y =…

A: step 1-

Q: For the conditions show below, calculate the safety factor of the clay against bottom blow-up after…

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Q: I For soil profile shown in Fig. Calculate the amount of ultimate consolidation settlement( 2 m 0.5…

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Q: An 1000 kN compressive load is to be imposed on a 400-mm diameter, 18-m long steel pipe pile driven…

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Q: A clay specimen drained on both sides was tested. The data were obtained P1=50 kPa e1=0.92 P2=120…

A: Coefficient of compressibility Coefficient of compressibility= ∆e∆σCoefficient of compressibility=…

Q: A group pile in clay is shown in the figure below. Determine the maximum vertical load Qg be applied…

A: Different soils strata and their properties are given.  To find maximum permissible vertical load,…

Q: A stiff clay layer of 11.02 m thickness with a unit weight of 17.52 kN/m³ overlies a sand layer. The…

A: Given: The thickness is 11.02 m. The unit weight is 17.52 kN/m3. The depth of excavation is 8.52 m.

Q: Circular precast concrete piles with 60 cm in diameter will be driven to a tip penetration of 30 m.…

A: Circular precast concrete piles with 60 cm in diameter will be driven to a tip penetration of 30 m.…

Q: A cellular cofferdam of 8.4 m radius and 15 m height is proposed for flood protection. Properties of…

A: The factor of Safety: The factor of safety is the ratio of the yield stress to the working stress of…

Q: A storage tank of diameter of 30 m and gross (total)weight 105 kN is to be constructed on site shown…

A: Assume unit wt of the water γw=9.81 KN/m3Unit wt of sand  γs =G+Se1+eγw=2.8+0×e1+0.55×9.81=17.72…

Measuring site work, Excavation and Piling

Bid drawings typically include very little material about the precise requirements of site work operations, measuring site work and excavation work differs from measuring most other works on a construction project. The actual site work conditions are not provided and also the dimensions of the excavations are not known during the pre-construction phase. The precise measurement of the excavation and backfill of the earth material and topsoil is important for a contractor to decide upon the total cost required for the process. All the works should be carried out under OSHA (Occupational Safety and Health Administration) standards to ensure the safety of the workers.