Sub Base Constructions

4.2 Degree of Compaction
The sub-base would be compacted to not less than 98% of the maximum dry density of the material as per BS 1377.

4.3 Quality Control
1. Where the surface is high, it would be trimmed and suitably compacted to achieve the tolerances.
2. Where the surface is low, the deficiency would be corrected by scarifying the existing layer and adding fresh material.
3. The degree of compaction would be checked by field density measurements at the rate of one test for every 500m2 subject to a minimum of two tests for any completed section of work.
4. Inspection Check List

4.4 Protection of Sub-base
1. Maintenance would include the immediate repair of any damaged or defects which may occur as is necessary to keep the sub-base continuously intact.
2. Repairs would be done in such a manner that will ensure restoration to an even and uniform surface and may involve scarifying, watering and recompacting.
3. Methodology Flow Chart

5. Safety Plan
5.1 Safety Plan
In order to minimize the occurrence of site accident, the provision of a safe working environment for workers to work is essential.  Our company endeavors to make a zero accident record in each site.  In addition to the above, the following safety precaution must also be implemented in achieving the minimization of site accidents.

5.1.1 Site Staff & Labor
1. Safety Induction Training would be conducted to all new employees by the safety officer prior to start any work.
2. Regular safety induction courses and toolbox talks would be arranged on site for operative and supervisory staffs and in particular for those new workers.
3. Personal Protective Equipment (PPE) such as safety boots and helmets would be provided with workers.
4. Barricades with warning signs would be established all around the working area.
5. All tools, plant, equipment and temporary facilities and all other items use to carry out the work should be in a safe, sound and good condition.
6. Alcoholic drinks and other substances, which may impair judgment, would be prohibited from the Site.
7. Investigation would be taken place to identify falling hazards and preventive measures would be taken immediately.
8. A notice would be erected to prevent outsiders entering to our work sites, “No Entry for Outsiders”.
9. Signalmen would be deployed if the work spaces disturb traffic flow in the main road.  A traffic supervisor would also be deployed to take responsibility over the traffic control.
10. First aid facilities such as a first aid box would be made available for in case of minor injury treatment.

5.1 Safety Officer, Safety Patrol and Safety Meeting
In concern with the approach to continual reinforcement to safety measures, there would also be daily meetings held during the course of the works, where site safety matters would be part of the agenda.  These meetings would focus mainly on highlighting the dangers associated with and the measures to be taken for the actual works being carried out at the time.

6. Environmental Control
a.    Effort would be made to clean the affected road surface, i.e., brushed off, and washed off.
b.    Every effort would be made to ensure no environmental pollution complaints from residents of the work area with regard to water pollution.
c.    Environmental complaints would be registered in the complaint register as specified in the Environmental Implementation Action Plan.

d.    Every effort would be made not to disturb prevailing surface water run off.
e.    Water pool area would not be disturbed.
f.    Water streams and water wells would be prevent from pollution. Equipment and vehicles shall not be allowed to wash in the drinking water wells or streams.
g.    Noise pollution prevention effort would be made to minimize construction noise levels. Vehicles and equipments would be maintained in good condition in order to prevent from noise pollution.

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