A test well is to be constructed for dewatering purpose in a planned excavation for foundation. The radius of the test well is 400 mm. The constant yield from the test well is 5.25 m3/min with a drawdown height of 6.3 m. Thickness of the water-bearing stratum above an impervious layer of clay is 11.5 m. Water table level is 1.80 m below the ground surface. The hydraulic conductivity of the pervious stratum is 0.15 m/min. Draw the aquifer and determine the following parameters: a. Radial distance at zero drawdown b. Depths of excavations for horizontal radial distances of 100 m and 280 m from the test well that will just reach the water surface levels along the drawdown curve.
A test well is to be constructed for dewatering purpose in a planned excavation for foundation. The radius of the test well is 400 mm. The constant yield from the test well is 5.25 m3/min with a drawdown height of 6.3 m. Thickness of the water-bearing stratum above an impervious layer of clay is 11.5 m. Water table level is 1.80 m below the ground surface. The hydraulic conductivity of the pervious stratum is 0.15 m/min. Draw the aquifer and determine the following parameters: a. Radial distance at zero drawdown b. Depths of excavations for horizontal radial distances of 100 m and 280 m from the test well that will just reach the water surface levels along the drawdown curve.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A test well is to be constructed for dewatering purpose in a planned excavation for foundation. The radius of the test well is 400 mm. The constant yield from the test well is 5.25 m3/min with a drawdown height of 6.3 m. Thickness of the water-bearing stratum above an impervious layer of clay is 11.5 m. Water table level is 1.80 m below the ground surface. The hydraulic conductivity of the pervious stratum is 0.15 m/min. Draw the aquifer and determine the following parameters:
a. Radial distance at zero drawdown
b. Depths of excavations for horizontal radial distances of 100 m and 280 m from the test well that will
just reach the water surface levels along the drawdown curve.
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