Answered: The MMDA in its previous study for a…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

The MMDA in its previous study for a proposed sanitary land fill site in Cavite is planning to use a clay liner for the landfill. Tests were performed on a sample clay from a borrow site. It was deemed necessary to have a minimum clay liner thickness of 0.30 m. The following results were obtained in the laboratory test.

Initial water level in standpipe = 96 cm
Final water level in standpipe = 56 cm
Diameter of standpipe = 12mm
Height of Soil Sample = 10.2 cm
Diameter of Soil Sample = 5.4 cm
Duration of test = 12 hrs

The project manager would like to determine the effectiveness of using on-site clay soils for the lining material if it is favorable. Tests were also performed on the on-site clay and the following results were obtained.

Height of Soil Sample = 8 cm
Diameter of Soil Sample = 5 cm
Volume of water collected = 75600 cm³
Constant Head = 60 cm
Duration of Test = 1050 hrs

Compute the permeability of the borrow clay in cm/sec
Compute the permeability of the on-site clay in cm/sec
Compute the thickness of the on-site clay which is equivalent to 0.3 m of the barrow clay.

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