Asia Baru Construction
We are in civil and building construction with particular specialisation in Water Works and Sewerage project ranging from sewerage treatment plant, river intakes, water treatment plants, storage tanks, reservoirs, pipe laying and major diversion...etc
PROJECTS > The Proposed Closed Circuit Television(CCTV)Inspection And Repair Works For The Completed Sewerlines

Project Background
The wastewater generation at Putrajaya was collected by a series of sewer networks that eventually lead to two centralised sewerage treatment plants, STP 1 and STP 2. The preliminary site investigation of the sewer networks by PJH had concluded the presence of groundwater infiltration and siltation problems at STP1 through the sewer networks. Therefore, an open tender was called by PJH to carry out 100% CCTV on all laid sewerlines and rectify any sewer defects which caused the leaking problem. Asia Baru Construction Sdn. Bhd. was successfully in its bid and the following works were carried out:

> Monitoring of the sewer mains through Closed Circuit Television and Man Entry Inspection for sewers with internal diameter ranging from 225mm to 1800mm.

> Sewer cleaning and pipe jetting of sewers with internal diameter ranging from 225mm to 1800mm.

> Provide appropriate lining and patching of all defective sewerlines with internal diameter ranging from 225mm to 1800mm.

> Locating and rectify all missing and buried manholes.
Project Information
Client / Owner: Putrajaya Holdings Sdn. Bhd. (PJH)
Consultant: Sepakat Setia Perunding Sdn. Bhd.
Main Contractor: Asia Baru Construction Sdn. Bhd.
Date of Commencement: 3rd December 2003
Date of Completion: 28th August 2005
Project Methodology
Upon confirmation of the Client in giving possession of site, the manpower and machineries i.e. CCTV machine and jetter required were mobilised to site. Two teams were allocated to carry out pre-CCTV inspection at two different locations concurrently and another team was being mobilised to carry out the location of buried manhole and raising of manhole works. The details of the sequence of work for CCTV inspection and locating and raising of manhole work are shown in Figure 1 and Figure 2 respectively.

For pipe size less than 1200mm dia., the inspection work was carried out by using CCTV and the rectification method is known as patch repair. However, for pipe size 1200mm dia. and above, man entry method was used instead of CCTV and the rectification method is known as Mechanical Seal (ME Seal) installation instead of patch repair.

The nature of work for this project was very different from those previous projects undertaken by Asia Baru Construction Sdn. Bhd. This was because the major component of works under this Contract pertains to rehabilitation of the sewerlines which were also known to be the first sewerlines rehabilitation contract ever implemented in Malaysia.

Many challenges were faced by Asia Baru Construction Sdn. Bhd. during the initial period of the project such as (i) disagreement in the rectification method between Client and the Local Authorities (JPP / IWK). (ii) the existing sewer were filled with debris and silt and (iii) high flow condition which had caused the CCTV inspection and rectification work extremely difficult to carry out. However, Asia Baru Construction Sdn. Bhd. still managed to overcome all these difficulties and completed the project within the approved extended completion period and successfully handed over to JPP/IWK.