Ashghal has achieved 1.5mn man-hours without loss time injury (LTI) since it started implementing the works of Doha South Sewage Infrastructure Project in December 2016, it was announced.
The achievement was celebrated in the presence of Drainage Networks Projects Department manager engineer Khalid Saif al-Khayareen along with representatives from CH2M, the project management consultant.
Certificates of appreciation were presented to the project contractor, joint venture “Bouygues Travaux Publics” and “UCC”, represented by Daniel Clert.
On the occasion, al-Khayareen said “this important achievement in the field of workplace safety enhancement comes as a result of Ashghal’s comprehensive and stringent health and safety measures which are included in the pre-qualification process for contractors applying to work on any of the Authority’s projects.”
The Doha South Sewage Infrastructure Project works started with excavation works for the main trunk sewer in December 2016. More than two-third of the project works are completed.
The project comprises the construction of a 16km main trunk sewer, divided into three segments, eastern, northern and western. This is in addition to the design and construction of 11 shafts that will be used to excavate the main tunnel. The main trunk sewer will convey the sewage flows through pumping stations to the existing Doha south treatment works.
The project also includes the construction of seven lateral interceptor sewers with a length of about 24km, which will convey flows from areas in the centre of Doha to the main tunnel.
The Doha South Sewage Infrastructure Project is designed to serve areas in the south of Doha and the expected population growth. The project can be linked to future infrastructure projects and when completed, it will enable the decommissioning of more than 20 old pumping stations currently located in the residential and commercial areas in the south of Doha.
One of the important benefits of the project is the gravity based main trunk sewer that will link a number of areas in the south of Doha to the sewage network. As a result, it will reduce the environmental impacts through the full control of odours in sewage treatment works and conveying system, and reduce other environmental problems arising from sewage overflow due to excess hydraulic pressure on the existing drainage network, where sewage flows exceed its capacity.
The main trunk sewer will be excavated using two tunnel-boring machines designed specifically for the geological features encountered in Doha. To minimise the footprint within the city of Doha, five shafts will be excavated using a vertical shaft machine.
The project will be completed by the first quarter of 2019. The Doha South Sewage Infrastructure Project is the first project in the region to implement the ‘Ceequal’ an international evidence-based sustainability assessment, rating and awards scheme for civil engineering, infrastructure, landscaping and works in public spaces.
The joint venture “Bouygues Travaux Publics” and “UCC” is the project contractor and “CH2M” is the project management consultant.
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