Lali Cable-Stayed Bridge

Service:

Engineering

Epc Constractor:

Bolandpayeh CO

Project status up to now: 

Completed

Specifications:

 Lali Cable-stayed bridge is the largest one in Iran, and was awarded as “the first outstanding project” by Iranian Concrete Institute in 2011, but is Iran’s second highest which follows the west span of Karun 3 dam bridges (The larger west crossing is over the main channel of the Karoun river. The smaller East span crosses a smaller side canyon). All 3 crossings are over deep reservoirs created by the construction of downstream dams. Upon construction of Gotvand Dam in Khouzestan Province in south-west Iran, a reservoir several kilometers long was formed on the river Karoun. Therefore, construction of a new bridge on the road from Lali to Masjed Soleyman in the south-west of the countr y became indispensable. The previous roadway was 150 m above Karoun River. In early 2011 the lake began to fill up behind the dam. Therefore, the river surface went from an elevation of 104 m to 230 m at full reservoir. Karoun River has the greatest discharge compared to other rivers in Iran and is hence the most important power-producing waterway in the country.The new span is situated 3 km upstream from the original Lali Bridge, a narrow British-built truss from 1950s, which is now submerged deep under the new reservoir. The longest span cable-stayed bridge in Iran, traverses the valley with a structure which consists of a central span of 256 m and two side spans of 102 m, accounting for a total length of 460 m with no approach spans. The two-lane deck is 13.5 m wide. The cable system is a modified fan arrangement, which withstands traffic loads. In the design of the bridge seismic measures were taken. Executive process of the project starts in 2007 and in 2011 the project completed and opened to public.