Work has started on fixing the 19m section of main road in Kuala Lumpur which collapsed last week.
The crown of a road tunnel being built to ease congestion below the Jalan Imbi intersection was also breached in the incident but it is not yet clear whether the tunnelling caused the pipe failure or the pipe ruptured and caused the ground collapse.
A second collapse at the site resulted in a 10m deep hole just 20m from the elevated KL Monorail track near the Imbi station and trains between the Hang Tuah to Imbi stations have been halted in the interest of safety.
Consultants engaged by the rail operator had decided that they needed to conduct more checks on the ground conditions and the integrity of the two monorail pillars in the affected area.
Federal Territories minister, Tengku Adnan, said remedial work was on-going and included pumping approximately 1,500m2 of sand into the sinkholes to stabilise the affected area while an investigation was launched as to whether there was negligence on the part of the contractor.
Meanwhile, Kuala Lumpur Fire and Rescue Department deputy director Azizan Ismail said contractors have installed iron rods and added sand around the tunnel area, sealed the 50mm water pipe and installed sensors at KL Monorail pillars to monitor their stability.