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The contractor fixed the above problem – Photo: CTV
Damaged location on the P14-10 pillar, on the VD14 viaduct section of the CP2 package (aerial and depot section) of metro line 1 (Ben Thanh – Suoi Tien) by the Sumitomo – Cienco 6 joint venture as general contractor.
According to the fault description, the rubber pillow (left pillow in the direction of Ben Thanh to Suoi Tien) used for the viaduct beam at the P14-10 pillar position (the beam installed 4 years ago) fell off of the pillow. “undefined reason”.
The incident caused the previously installed track to fail, to come off the bolts associated with the lower support system, and to crack the concrete of the track pad in this position.
According to a traffic expert, the bridge support is the part that connects the girder to the abutment, which acts as a load bearing and reduces the force of the span structure transmitted to the abutment. Bridge supports help connect less elastic beams and stirrups, creating elasticity …
According to the HCM City Rail Management Board, the area where the rubber pillow fell has been built since 2016 and the contractor is still building this package. Before the test run, the inverter carefully checked each location and discovered the above problem.
“The investor strictly requested the general contractor to fix the problem to ensure the quality as prescribed, and at the same time evaluated and found the cause to avoid similar errors. On October 31, the contractor finished overcoming the problem. “said an official of the Board of Directors of Urban Railways.
Mr. Ha Ngoc Truong, Vice President of the Ho Chi Minh City Association of Bridges and Roads, said that the fall of the rubber pillow had many reasons, such as an incorrect construction process or a poor quality rubber pillow … “This must be carefully inspected and evaluated to find the cause. Not only does the contractor do the inspection, but it also requires the participation of experts who are knowledgeable in this matter,” Truong said.
The investor asked the contractor to investigate and find the cause of the loss – Photo: CTV
Previously, the Urban Railway Board of Directors in Ho Chi Minh City issued a written request to the general contractor to urgently investigate the cause of the accident, notify on November 13 along with the repair plan.
To prevent similar incidents from occurring at other locations, the investor also asked the consortium to verify the overall quality of the CP2 bridge bearings, compare them, and compare them with the design to ensure projected safety. judgment. This is the general contractor who must report the results by December 15th.
In particular, the NJPT supervisory consulting joint venture, the investor is required to coordinate inspection and problem handling, as well as consider the general contractor’s corrective direction. Units must review the selection of contractors to provide installed rubber pad materials in the bidding package and inform the investor by November 13.
Metro No. 1 has a total investment of 43.700 billion VND, almost 20 km long, including 2.6 km underground and more than 17 km aerial. The viaduct section of the route is 14.5 km long. Full dProjects currently reach more than 78%, of which the CP2 package reaches 88% in volume.
Ho Chi Minh City aims to exploit the project by the end of 2021.
