A constant-head flow experiment is set up as shown. The soil is a saturated cylindrical silty sand sample extending between Points B and D. Hydraulic conductivity of the sand is k = 1 x 10-3 cm/sec.
- Using the datum shown, calculate the elevation head he (cm), pressure head hp (cm), and total head ht (cm) at Points A, B, C, D and E. Report your answers in the table provided.
- Calculate the flow (in cm3/hr) through the silty sand assuming the diameter of the cylindrical sample is 7.5 cm.
Table below has partial answers. My main interest is points CDE. Please explain how do you derive the answers
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Pl |
Homework Answers
- point 6 is directly calculated,,
- please use [ Head loss at C =37- total head at C]
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A constant-head flow experiment is set
up as shown. The soil is a saturated cylindrical silty...
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The given figure below illustrates upward flow of water through a silty soil sample. The sample...
The given figure below illustrates upward flow
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shape and, respectively, has a height and base area of 12 m and 50
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kN/m2)? (Note: When required, assume the unit
weight of water equal to 10 kN/m3)
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Problem 3: A constant-head permeability test was performed on the soil sample shown below. The hydraulic conductivities were 0.04 cm/s for the sand and 0.0004 cm/s for the silt. The cross-sectional area of the sample is 10 cm², of which 9 cm' is sand and the remainder is silt. (a) Plot how the total hydraulic head (expressed in terms of AH) and hydraulic gradient vary along the length of the sample. (b) What would be the hydraulic conductivity (k) for...
The given figure below illustrates upward flow
of water through a silty soil sample. The sample is of cylindrical
shape and, respectively, has a height and base area of 12 m and 50
cm2. Based on the provided information on the figure, what is the
effective stress at point A located in the middle of the sample (in
kN/m2)? (Note: When required, assume the unit
weight of water equal to 10 kN/m3)
Flow q-0.06 cm3/s A-50 cm2 K-0.02 cm/s ,,-20...
(1) The flow net with approximate square cells for a concrete dam is shown. The silt has a hydraulic conductivity of 0.2 ft hr. (a) What is the approximately seepage rate (ft/hr/ft)? (b) What are the total head (hr), elevation head (he), and pressure head (h) at points A and B h e (ft) he (ft) hrift) Point A (2) The flow net with approximate square cells for a single sheet pile is shown as below. The hydraulic conductivity of...
The figure below shows the soil profile conditions below a 5-m deep pond. Water is seeping directly downward under steady-state conditions through the clay layer into underlying gravel. Assume the elevation datum at the top of the gravel layer and that the hydrostatic ground water table is also found in the top of the gravel and its position does not change with time or amount of flow. For these flow conditions, calculate the following: a. b. c. d. e. f....
CIVL 409 Deliverables Modules 1-3 and due Date Dr. Ghanat, PE 27.3 pts) For the flow net shown below, (a) compute the flow rate through soil; (bjcompute the pore water pressure at Point A, which is at elevation 122.0 m. Silty sand has a hydraulic conductivity of 8 x 101 cm/s. 20.0 m- el. 134.2 m l 1243 m el. 124.3 el. 116.0 Sałty el. 96.8 m Concrete dam and elevation (el.) points 20.0 cl 126 1 el. 1243 el....
Problem III. You are working at a construction site that has the given groundwater flow conditions. Assume that head loss cannot be neglected in either the silt or the clay layers. Determine at the interface of the silt and the clay layers: a. Total vertical stress b. Effective vertical stress C. TOTAL horizontal stress (K = 0.35) Very very permeable sand 2 ft Clay 0.5 ft Silt 2 ft S1011111 SISWA W W WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW wwwwwwwwwwwwwwwwwwwwwwwwwwwww WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW Datum Layer Hydraulic Conductivity...
*need the uplift force
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