Experiment 3Permeameter Fix Column

PURPOSE

To determine the efficiently of permeability for the rough grain soil.

APPARATUS

Permeameter fix

PROCEDURE

1. Make sure tank have fixed column (Fixed column controlled by overflow

pipe tank)

2. Open valve fully and record time of necessity for water cater to cylinder to

level 500ml. Take the reading of manometer for the column A and B. Make

as much as 3 times.

3. Repeat step 2 with ½ valve open, and ¾ valve open to continue this

experiment.

4. Decide the efficiently of soil permeability.

RESULT

Soil Details,

Data :

Water Volume (Q) : 300ml

Example Diameter : 73.1 mm

Range of Between Extension A and B : 61.8 mm

Soil Sample Cross Section, A (Area) : 4197mm2

Area :

= (73.1) 2

4

4196.86 mm2

CALCULATION

K = V L h A t

K value when valve opened fully

300ml × 1 litre / 1000ml × 1m3 / 1000 litre = 3.0 × 10 -4 m 3 .

K = 300(6.18) /(19) (41.97) (7.41 )

= 1854 / 5908.96

= 313 mm /s

Valve

Open

Hidraul Column

h1 (mm)

Hidraul Column

h2 (mm)

Column Different (h/mm)

Time

(s)

Second

K

mm /s

full 240 50 19 7.41

2.98 mm /s290 100 19 7.77

300 128 17.2 8.28

QUESTION

1. Why this experiment important in civil engineering works?

This test important in civil engineering works because intend to determine

permeability a said soil. Apart from that, it also important to calculate

permeability the structure of the soil.

2. What would be happen to K value if :

a. Valve opening change

b. Cross sectional area until A soil sample change

c. Flow distance between A and B change

3. Comments And Conclusions

- There are too many corrections when this experiment goes on. Besides

that, certain equipment are too old to use on this experiment.

- The conclusion is the permeability of soil actually important to be

determined before a construction/building built on the site.

4. Compare K value that you achieve with K value that may be obtained from reference book.

What soil type that can be concluded?

There are two kinds of standard that could be followed namely BS1377 :

part 5: 1990 Determination Of Permeability By The Constant Head Methods

and US Standards ASTMD 2434-Permibility Of Granular Soils (Constant

Head) . This both methodologies only suitable for rough soil, especially

sand. For a squelchy soil (silty clay) on the other hand, permeability can be

obtained with use this column test decline method.

CIVIL ENGINEERING DEPARTMENT

Permeameter Fix Column

GROUP NAME : REG. NO. :

Nur Afiqah Binti Shaery 06DKA09F1053

Nur Aisyah binti Mohd Norzilan 06DKA09F1057

Nur Hidayah Binti Salehan 06DKA09F1060

Nurul Atikah Binti Md Razak 06DKA09F1063

Mohamad Haziq Bin Murad 06DKA09F1064

LECTURER’S NAME : Pn.Suhana Binti Sanatora