Week Six: Wednesday, 12th of May, 2010

Today I stayed in the office and I worked on the Standard Operational Procedure project (SOP- module 2) which was assigned to me by Eng. Zaidi.
Today I learned about the information of the objective, permits, equipment and steps that are followed during the HDD process with getting some help from Mr. Mohsin & Mr.Kamarul.
For today I sat the complete outline and ordering of the HDD work process as follow:
Objective:
The objective of HDD is inserting the ducts along a horizontal line as needed in order to connect and continue the ducts path.

Permits:
1.Construction permit (module 1: sec.1.3.2)
2.Excavation permit (module 1: sec.1.3.4)

Equipment:
1.Excavator
2.HDD Drilling Machine
3.PN pipes
4.Rollers
5.Pulling head
6.Reamer
7.End cap
8.Bentonite

Steps:
1.Surveying and target setting
2.Excavation of entry and exit pits
3.Drilling at the entry pit to reach the exit pit
4.Back drilling using the Reamer in order to make the hole wider and pulling the pipes by connecting the reamer to the pulling head that is attached to the pipes
5.Back filling & compaction
6.Paving and repairing the damaged facilities. E.g. walking side, vegetation.

Cautions and Preventing:
1.Utility mapping must be done using Global penetration Radar (GPR) to avoid damaging any other system pipes such as gas and sewerage pipes, during excavation. See (SOP module 1: sec.5.1)
2.Compaction process should be done in layers according to the compactor type to avoid any settlement in the soil.
3.E.g. for 1 ton roller compactor, every 300mm of the soil should be compacted.
4.Install the end cap at the end of each pipe to prevent the pipes from blocking.