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Time of India
19-05-2025
- Automotive
- Time of India
OMR cave-in: Barricades to stay
Chennai: Motorists taking OMR near Thiruvanmiyur junction will have to face bottlenecks and navigate barricades for at least two more days, as repair work on the 6ft-deep cave-in is still underway. Metrowater officials said though they completed backfilling the crater with soil and debris, it will take two or three more days for material to consolidate. Only after that will highway engineers proceed with concrete grouting and final relaying. The crater formed after an ageing 2.2m-diameter prestressed cement concrete sewage pipe, laid two decades ago, gave way at a weak joint roughly 3m underground. A car fell into the crater on Saturday night, injuring five passengers. On Monday, TNRDC and Metrowater engineers conducted test runs to ensure the fixed sewage line could handle load. Sewage was pumped to all five pumping stations connected to the damaged main line, and engineers confirmed there were no further leaks. Meanwhile, Guindy Traffic Investigation Wing registered a case under section 125(b) of BNS for acts endangering human life or personal safety, and other applicable sections, based on preliminary findings.
Time of India
18-05-2025
- Automotive
- Time of India
Workers race against the clock to fix OMR cave-in
Chennai: Motorists taking Old Mahabalipuram Road (OMR) near Thiruvanmiyur junction on Monday morning may face traffic delays, as workers race overnight to complete repairs on a massive cave-in that disrupted the arterial corridor on Saturday night. Though the barricaded portion may be narrowed to 4–5m by the morning, movement through this stretch, which connects Thiruvanmiyur with Taramani, will be affected. Over the weekend, Tamil Nadu Road Development Corporation (TNRDC) and Metrowater engineers worked 36 straight hours to contain the damage after a car fell into a six-foot-deep crater on Saturday, injuring five passengers. The vehicle was lifted out around 9pm, after which officials began excavation and diagnostics. The cave-in was traced to the sudden failure of a 2.2m-diameter prestressed cement concrete (PSC) sewage pipeline laid nearly two decades ago. Unlike modern ductile iron or High-Density Polyethylene (HDPE) pipes, PSC pipes rely on a tensioned steel framework embedded in concrete, and their brittle nature makes them prone to sudden breaks under stress or age-related wear. In this case, the failure occurred at a weak joint located roughly three metres below road level — deeper than previous minor bursts reported at Kasturba Nagar and Indira Nagar. Engineers first had to safely access the sewer chamber, ventilating it to mitigate the risk of poisonous gas exposure before clearing out a sludge-heavy sewage-mud mix with earthmovers. "On Sunday afternoon, they began installing reinforcement sheets over the damaged portion. However, sourcing compatible materials proved difficult, as PSC pipes are no longer manufactured widely and prefabricated sheets of the same grade are not readily available," said a senior highway engineer. By Sunday night, the team planned to grout concrete-mix into the void to stabilize the road base. This would allow partial reopening for Monday. But full relaying of the road will be deferred by at least two days, pending leak monitoring and structural settlement checks. If stable, final relaying is expected to begin by Tuesday.
New Indian Express
02-05-2025
- Business
- New Indian Express
Six-lane road work from Tiruvallur bypass to Sriperumbudur starts
CHENNAI: Deputy Chief Minister Udhayanidhi Stalin on Thursday inaugurated the construction of a six-lane, access-controlled highway, from Tiruvallur Bypass to Sriperumbudur. The stretch is part of the 132.87 km Chennai Peripheral Ring Road (CPRR) project. This third phase of the road works will cover a 30.1 km stretch and include two-lane service roads on either side, with a total project cost of Rs 2,689.74 crore. Highways Minister EV Velu and other officials were present during the function held at Thiruvallur. The 30.1 km Phase III of the CPRR will be executed in three stages: From Thiruvallur Bypass to Venkathur (10.4 km) at a cost of Rs 1,133.2 crore, Venkathur to Chengadu (10 km) at Rs 593.27 crore, and Chengadu to Sriperumbudur (9.7 km) at Rs 963.27 crore. The construction will include two major flyovers, one road overbridge, and two major bridges. The 132.87 km six-lane access-controlled road is being developed at a cost of Rs 16,212 crore with the funding from World Bank and other international agencies. The highway aims to facilitate faster movement of goods from southern Tamil Nadu to Ennore and Kattupalli ports, as well as to Andhra Pradesh, bypassing Chennai city. The CPRR starts at Ennore Port and ends at Poonjeri near Mahabalipuram on the East Coast Road (ECR), passing through Thatchur, Tiruvallur Bypass, Sriperumbudur, and SP Koil. Phase I of the project, undertaken by the Tamil Nadu Road Development Company (TNRDC) in 2021, covers a 25.4 km stretch from Ennore Port to Thatchur, including a link road to the Chennai Outer Ring Road, at an estimated cost of Rs 4,290 crore.
