For the shown profile, find i . the final consolidation settlement, ii . consolidation settlement after 5 years. iii. Time required to reach 50 % of the consolidation settlement X Fill (2 m, y =15 kNm3) Y-18 kN/m3 Sand Normally consolidated Clay Com 02. e= 0.6, y 20 km3, Cv0.5 m2year Gand

For the shown profile, find i . the final consolidation settlement, ii . consolidation settlement after 5 years. iii. Time required to reach 50 % of the consolidation settlement X Fill (2 m, y =15 kNm3) Y-18 kN/m3 Sand Normally consolidated Clay Com 02. e= 0.6, y 20 km3, Cv0.5 m2year Gand

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter5: Soil Improvement And Ground Modification

Section: Chapter Questions

Problem 5.13P

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7. It is desired to calculate the consolidation settlement of the 6m thick layer shown in the below figure that will result from the load caried by the footing measuring 3mx3m in plan (bottom of footing is 2m below the surface). Assume the clay to be normally consolidated. Compute the following: a. Immediate Settlement, S. b. Primary Consolidation Settlemen, S, c. Secondary Consolidation Settlement, S̟ d. Total Consolidation Settlement, S, of the clay 5 years after the completion of the primary settlement. The time for the completion of the primary settlement is 3 years. Es = 18 MPa Poisson's Ratio = 0.20 If = 1.0 Соmpression Index,Cc %3D 0.009(LL - 10) Secondary Compression Index, C, = 0. 020
It is desired to calculate the consolidation settlement of the 6m thick layer shownin the below figure that will result from the load caried by the footing measuring 3mx3m inplan (bottom of footing is 2m below the surface). Assume the clay to be normallyconsolidated. Compute the following:a. Immediate Settlement, ??b. Primary Consolidation Settlemen, ??c. Secondary Consolidation Settlement, ??d. Total Consolidation Settlement, ?? of the clay 5 years after the completion of the primarysettlement. The time for the completion of the primary settlement is 3 years.?? = ?? ??????????′? ????? = ?. ???? = ?. ???????????? ?????, ?? = ?. ???(?? − ??)????????? ??????????? ?????, ?? = ?. ??�
Describe about the normally consolidated deposit.
Refer to Figure 11.46. If the consolidation properties of the clay are rep- resented by the test results given in Problem 11.4, determine the primary 11.9 P Clay Df Yd H1 GWT B × L Ysat Clay Ysat Sandy gravel Figure 11.46 Copyright 2018 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. WCN 02-200-203 Problems consolidation settlement of the clay layer. Given: P = 675 kN, B = L = 3 m, D, = 2 m, H, = 4 m, and H, = 6 m. The soil properties are Sand: Ya 15 kN/m³; Ysat = 18 kN/m³ Clay: Ysat 18.9 kN/m³; e, = 1.18 P at the middle of the clay layer.) BL (Use Δσ' =
Describe spring analogy system with neat sketch. [5] A clay layer, whose total settlement under a given loading is expected to be 11cm settles 3cm at the end of inonth after the application of load increment. How many months will be required to reach a settlement of Scm? How much settlement will occur in 10 months? Assume the layer to have double drainage system. [7] Maximum size for Files You can drag and drop files here to add them. Accepted file types All file types
GEOTECHNICAL ENGINEERING For a vibroflotation project, the following backfill material specifications must be satisfied. Determine the suitability number, D25 and D30 Sorting Coefficient = 2 Uniformity Coefficient = 8 %3D Coefficient of Gradation = 0.60 %3D D10 = 0.20 D75 D20 = 0 26 mm Dso = 0 80 mm D30 - D25 = 0 22 mm 1. INPUT THE VALUE OF SUITABILITY NUMBER IN 2 DECIMAL PLACES 2 INPUT THE VALUE OF D25 IN MM AND IN 4 DECIMAL PLACES 3. INPUT THE VALUE OF D30 IN MM AND IN 4 DECIMAL PLACES
Q1. Discuss the following regarding compaction and consolidation a. Results of both b. Difference between both c. can compaction of earth be achieved by cosolidation? why/why not?
Suppose that you are a Project Engineer on a Dam project. The volume of soil required at the dame site is Vd=100,000m3. The final void ratio (ed) is 0.80. Your boss, the Project Manager delegates to you the important decision of buying the earth fill from one of three suppliers. • Supplier X sells fill at OMR. 0.200/m3 with e = 0.90• Supplier Y sells fill at OMR. 0.120/m3 with e = 2.00• Supplier Z sells fill at OMR. 0.150/m3 with e = 1.60Evaluate and select the best supplier based on your knowledge about soil compaction.
The 20ft high clay fill shown below is proposed to be constructed over a layer of soft clay. A 5ft gravel layer is placed above the soft clay in order to facilitate drainage, assume it has the same unit weight as dense gravel. Answer the following: What is the magnitude of the settlement one year after the construction begins? What is the effective stress at Point A one year after construction begins if Point A is 25 feet below the GWT?
Consolidation test results are provided below, (Hint: C, or C = Ae / log(of/ai') ): 1.2 1.1 1- 0.9 Void ratio 0.8 0.7 0.6 0.5 0.4 1 10 100 1000 Vertical stress (kPa) (log scale) In some of the results an interval is provided. It ccan be possible to get a result between the given values Use the plot and find pre-consolidation pressure (past maximum vertical effective stress) pe' according to Casagrande's method. pe'= .kPa Seç. Find C, Seç. Find C.: Seç. If the tested soil sample is taken at a depth of 5m (ysat=18kN/m) where the groundwater table is located at the surface what is the Over Consolidation Ratio(OCR) (OCR= pclo vo) Seç. Initial height of the specimen is 22mm. What is the final height of the specimen when effective vertical stress is 650kPa? Hint: Use void ratio. Seç. (Result is in mm) What is the consolidation settlement of 2m thick clay layer if initial effective stress is 20kPa and final effective stress is 400kPa. Hint: Poc= Seç. [Ho/(1+einit)]x[C,log(p'/o'init) +…
6.5 Complete the earthwork calculation sheet here and plot the resulting mass diagram. Divide ccy by 0.9 to convert to bcy (column 10). Calculate th average haul (trapezoidal formula) for the balances on this project. Is this a waste or borrow project? Alge- braic Strip- ping fill Strip- ping cut Vol. of End- Vol. of End- Total fill Adj. fill Total Mass ordi- area area cut sum fill fill cut cut (ccy) (bcy) (ccy) (8) (bcy) (10) (bcy) (11) (bcy) (ссу) (Ьсy) (5) nate (sf) (2) (sf) (3) Station (9) (7) (12) (6) (4) (1) 0.90 10 + 00 80 580 11 + 00 90 2100 0. 12 + 00 100 13 + 00 4650 100 6000 14 + 00 60 80 560 3250 15 + 00 80 1620 16 + 00 1300 85 80 2450 700 17 + 00 100 7800 18 + 00 90 3620 1980 19 + 00 80 20 + 00 80 1310 21 + 00 10 80 860 580 22 + 00 100 10 23 + 00 1620 250 100 3850 24 + 00 100 25 + 00 2600
A road section is 600 m long (20 Stations). The cut and fill volumes are to be computed between each station. The table below lists the station numbers, the end area values (m?) between each station that are in cut (column 2) and that are in fill (column 3). Material in a consolidate (known shrinkage), and for this road section, is 10 fill section will as percent. Determine the accumulated volumes? End Area (m2) 1 3 Station Cut Fill 3 18 1 2 50 2 97 4 130 4 8 51 40 45 6. 45 20 7 80 8 122 2 130 10 140 11 100 12 80 30 13 75 20 14 50 50 15 20 80 16 10 100 17 120 18 120 19 40 50 20 30 30