Scribd
Upload
443 views1 page

Field Permeability Test-3

The document summarizes the results of a constant head permeability test conducted according to BS-5930 (1981) standards. The test was performed at a depth of 548.64cm below the borehole casing in silty sand and sandy silt soils. Over a period of 50 minutes, a total flow of 2850cm3 was measured through the filter material. Based on the test results, the calculated permeability (K) of the soil was determined to be 1.88 x 10-4 cm/sec.

Uploaded by

P Allen Samuel Ignatius
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
443 views1 page

Field Permeability Test-3

The document summarizes the results of a constant head permeability test conducted according to BS-5930 (1981) standards. The test was performed at a depth of 548.64cm below the borehole casing in silty sand and sandy silt soils. Over a period of 50 minutes, a total flow of 2850cm3 was measured through the filter material. Based on the test results, the calculated permeability (K) of the soil was determined to be 1.88 x 10-4 cm/sec.

Uploaded by

P Allen Samuel Ignatius
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
You are on page 1/ 1

FIELD PERMEABILITY TEST(Vertical)

BS-5930 (1981)
Constant Head Permeability Test Site: Head Khanki Barrage Location:
Depth below top of casing: Job No. Borehole: BH - 22
(a) Bottom of borehole: 548.64cm Date: 24-05-08 Test No: 03
(b) Bottom of casing: 548.64cm Groun level: Crew/Operator: Mohsin
(c) Top of filter material: - cm Weather: Sunny Tested by: Adnan / Safdar
(d) Initial ground water level: 198.12cm External diameter of casing: 7.325 cm
Height of casing above surface: 52 cm Length of filter: - cm
Elevation of casing: Type of soil: Silty Sand / Sandy Silt

Clock Time Elasped Time Initial Reading Final Reading Flow (cm3)
5:14:00PM 1 (1) 1000 440 560
1 (2) 440 180 260
1 (3) 180 0 180
1 (4) 1000 900 100
1 (5) 1000 900 100
2 (7) 800 580 220
2 (9) - - -
2 (11) 580 390 380
2 (13) 390 280 110
2 (15) 280 190 90
5 (20) 190 0 190
5 (25) 1000 850 150
5 (30) 850 730 120
10 (40) 730 540 190
10 (50) 540 340 200

Total Elapsed Time (Min) 50 (3000) Total Flow ( cm3 ) 2850

q= (Total Flow) / (Elapsed Time) 0.95 cm3/sec


F= 2.75 x D 20.143 cm
Hc= ( Total Head in cm ) 250.12 cm
K= q/ F * Hc 1.88 x 10 -4
cm/sec

You might also like