1.0 Introduction
Retaining walls to be constructed at the places where identified by the Engineer and this work shall consist of concrete retaining walls including all necessary components.
2.0 Abbreviation
SE – Site Engineer.
TO – Technical Officer.
QAS – Quality Assurance System.
ME – Materials Engineer (Contractor).
TS – Technical Specification.
3.0 Resource Allocation
| Man Power | Equipments & Tools | Material |
| Site Engineer -01 | Track Back-hoe loader-01 | Cement |
| Surveyor-01 | Wheel Loader( if necessary) | Fine Aggregates |
| Survey helpers-03 | Water pump( if necessary) | Coarse Aggregate |
| Forman-01 | Dump trucks(15 tons)-02 | Steel |
| 2 No Flagmen (minimum) | Mamoties | Plywood Sheets |
| Skilled labours-06 | Crow bars | |
| Unskilled labours-05 | Shovels | |
| Operators-As required | Level instrument | |
| Concrete Mixer ( if necessary) | ||
| Porker vibrator | ||
| Safety boots | ||
| Safety Helmets | ||
| Safety Gloves | ||
| Traffic signs | ||
| Blinking Lights | ||
| Barricade boards | ||
| Traffic cones | ||
| Direction boards |
4.0 Quality Control Procedure
4.1 Material Sampling and Testing
The materials Engineer would take the samples from required materials such as concrete and soil according to the specified frequency and locations.
Concrete: in concrete, one set of cubes would be made per 10 cu.m of concrete. At least one sample would be taken on each day that a particular grade is used. Crushing strength of the concrete cubes would be tested for the samples at ages of 7 and 28 days. Each sample would be identified by identification No and it is displayed on the test cubes and a same identification No would be included in the sample register. The identification tag includes, the date of cast, age of test and date of test to be performed.
4.2 Inspection Check List
To ensure that the all activities being performed with the expected quality, an inspection check list would be filled by QAE or the respective QA inspectors in case of pre construction, during construction and post construction. The inspection check list shall include the specific requirements, safety and environmental measures.
4.3 Dimension Control
All specified lengths, widths and heights would be properly maintained during construction and all these dimensions would be checked with the inspection check list. In case of identifying the undesirable changes in specified dimensions and even beyond the specified tolerances, the particular work would be reworked before the subsequent work.
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