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1- A long coffer dam is to be constructed to hold water as shown in the figure. The geometry of t...
Draw a flow netlfor the case of a long concrete dam shown in the Figure below...
Draw a flow netlfor the case of a long concrete dam shown in the Figure below and calculate the quantity of seepage underneath the dam. The soil underneath the dam is homogeneous and isotropic with a coefficient of permeability of 1.8 x 106 m/s. Determine the minimum weight of the dam required to maintain a factor of safety of 1.5 against the uplift of the dam. If the saturated unit weight of the soil is 18 KN/mP, check whether quicksand...
GEOTECHNICAL AFTERNOON SAMPLE QUESTIONS Questions 50s-506: A reinforced concrote dam having a sheet-pile cutolf wall is to be uned to retai 12-foot-high wader. The dam is 120 fbet long-d be dimen...
GEOTECHNICAL AFTERNOON SAMPLE QUESTIONS Questions 50s-506: A reinforced concrote dam having a sheet-pile cutolf wall is to be uned to retai 12-foot-high wader. The dam is 120 fbet long-d be dimensions led the now net ne shown in figu爬below. The-soil has the following characteristic: Homework problem Cocfficient of permeability 0003 fpa (isotropie soil) Compute: (1) The quantity of seepage loss under the dam (cfs). (2) The pressure head at Point A, which is 2.0 feet above the impervious base. 12-...
Consider the figure of a dam shown below. The soil underneath the dam foundation has a...
Consider the figure of a dam shown below. The soil underneath the dam foundation has a coefficient of permeability, k = 3.5 x 10-3 cm/s. The water head on the upstream side is 15 m, and on the downstream side is 1 m. Compute the daily seepage underneath the dam if the length of the dam is 400 m. (Hint: draw the flow net) 1 1 DAM 15 m 1 m is Bed Rock
3. The flow net shown below illustrates flow conditions beneath a concrete dam featuring an upstream...
3. The flow net shown below illustrates flow conditions beneath a concrete dam featuring an upstream "clay blanket" (an impermeable clay layer) and a downstream "cutoff wall", both of which serve to lengthen the flow path. The coefficient of permeability, k, of the permeable strata is 8 x 10 cm/s. a. Calculate the flow rate, q, per day beneath the dam (per m of dam out-of-plane). b. Calculate the total head, elevation head, pressure head, and pore water pressure at...
50 m Impermeable Concrete dam 6 m 1 m 10 m PtA (at mid-point of layer...
50 m Impermeable Concrete dam 6 m 1 m 10 m PtA (at mid-point of layer and centre of base) DATUM Impermeable bedrock Figure 2: Concrete dam (not to scale) Figure 2 shows the cross-section through a long concrete dam in anisotropic soil. The horizontal and vertical permeability of the soil are: K 25 x 10-4 cm/sec and Ky 1 x 10-cm/sec.. (a) Calculate the transform parameter a. In your exam booklet, draw the transformed flow domain to scale and...
Problem (2) (12) For the concrete dam and soil profile shown in the Figure below, the...
Problem (2) (12) For the concrete dam and soil profile shown in the Figure below, the flow net is cons channel and 8 isted of 3 fNow rops, calculate: a) The rate of seepage under the dam in ft /sec/ft. b) Pore water pressure at points A, C, and D in Ib/ft. c) The uplift force in lb/ft at the base of the dam due to water pressure C use points C and D). 20
(1) The flow net with approximate square cells for a concrete dam is shown. The silt...
(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...
2. Complete the following for the impermeable dam shown below: a. Identify a datum, indicate the...
2. Complete the following for the impermeable dam shown below: a. Identify a datum, indicate the first and last equipotential lines, and indicate the first and last flow lines b. Draw the flow net and determine the seepage under the dam. Calculate the pore water pressure (u) at points A, B, and C (in units of kPa). d. c. Estimate the uplift force (Fu) under the concrete dam (in units of kN/m of length) Note: an additional figure is included...
5 8 7 8 9 10 111 112 113 114 15 Q3b(i) Figure shows a flow...
5 8 7 8 9 10 111 112 113 114 15 Q3b(i) Figure shows a flow net beneath an impervious concrete dam. The permeability of the soil foundation is 1.4 x10-6 m/s. The head loss between upstream and downstream is 6.8m. The water height (H1) is 13.4m. Unit weight of water is 9.81 kN/m3 Upstream H1 11.5 m Downstream T 9.0 m 17.0 m; datum impermeable stratum Determine the quantity of seepage in m/day, if the dam is 4 m...
the cross-section through a concrete dam is shown in the figure Iielow. Determine t ceéfficient of...
the cross-section through a concrete dam is shown in the figure Iielow. Determine t ceéfficient of hydrailic conductivity of the foundai shown in the figure. The unit weight of water is 9.81 kN/m the puantity of seepage under the le downstream witer level is selected as datun a 1.00m0.80 m Datunm 500 m 5 (s in 20 m 10
Draw a flow netlfor the case of a long concrete dam shown in the Figure below and calculate the quantity of seepage underneath the dam. The soil underneath the dam is homogeneous and isotropic with a coefficient of permeability of 1.8 x 106 m/s. Determine the minimum weight of the dam required to maintain a factor of safety of 1.5 against the uplift of the dam. If the saturated unit weight of the soil is 18 KN/mP, check whether quicksand...
GEOTECHNICAL AFTERNOON SAMPLE QUESTIONS Questions 50s-506: A reinforced concrote dam having a sheet-pile cutolf wall is to be uned to retai 12-foot-high wader. The dam is 120 fbet long-d be dimensions led the now net ne shown in figu爬below. The-soil has the following characteristic: Homework problem Cocfficient of permeability 0003 fpa (isotropie soil) Compute: (1) The quantity of seepage loss under the dam (cfs). (2) The pressure head at Point A, which is 2.0 feet above the impervious base. 12-...
Consider the figure of a dam shown below. The soil underneath the dam foundation has a coefficient of permeability, k = 3.5 x 10-3 cm/s. The water head on the upstream side is 15 m, and on the downstream side is 1 m. Compute the daily seepage underneath the dam if the length of the dam is 400 m. (Hint: draw the flow net) 1 1 DAM 15 m 1 m is Bed Rock
3. The flow net shown below illustrates flow conditions beneath a concrete dam featuring an upstream "clay blanket" (an impermeable clay layer) and a downstream "cutoff wall", both of which serve to lengthen the flow path. The coefficient of permeability, k, of the permeable strata is 8 x 10 cm/s. a. Calculate the flow rate, q, per day beneath the dam (per m of dam out-of-plane). b. Calculate the total head, elevation head, pressure head, and pore water pressure at...
50 m Impermeable Concrete dam 6 m 1 m 10 m PtA (at mid-point of layer and centre of base) DATUM Impermeable bedrock Figure 2: Concrete dam (not to scale) Figure 2 shows the cross-section through a long concrete dam in anisotropic soil. The horizontal and vertical permeability of the soil are: K 25 x 10-4 cm/sec and Ky 1 x 10-cm/sec.. (a) Calculate the transform parameter a. In your exam booklet, draw the transformed flow domain to scale and...
Problem (2) (12) For the concrete dam and soil profile shown in the Figure below, the flow net is cons channel and 8 isted of 3 fNow rops, calculate: a) The rate of seepage under the dam in ft /sec/ft. b) Pore water pressure at points A, C, and D in Ib/ft. c) The uplift force in lb/ft at the base of the dam due to water pressure C use points C and D). 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...
2. Complete the following for the impermeable dam shown below: a. Identify a datum, indicate the first and last equipotential lines, and indicate the first and last flow lines b. Draw the flow net and determine the seepage under the dam. Calculate the pore water pressure (u) at points A, B, and C (in units of kPa). d. c. Estimate the uplift force (Fu) under the concrete dam (in units of kN/m of length) Note: an additional figure is included...
5 8 7 8 9 10 111 112 113 114 15 Q3b(i) Figure shows a flow net beneath an impervious concrete dam. The permeability of the soil foundation is 1.4 x10-6 m/s. The head loss between upstream and downstream is 6.8m. The water height (H1) is 13.4m. Unit weight of water is 9.81 kN/m3 Upstream H1 11.5 m Downstream T 9.0 m 17.0 m; datum impermeable stratum Determine the quantity of seepage in m/day, if the dam is 4 m...
the cross-section through a concrete dam is shown in the figure Iielow. Determine t ceéfficient of hydrailic conductivity of the foundai shown in the figure. The unit weight of water is 9.81 kN/m the puantity of seepage under the le downstream witer level is selected as datun a 1.00m0.80 m Datunm 500 m 5 (s in 20 m 10
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