Bridging the gap

12.02.2014 | News
In an effort to better road connectivity between Punjab and J&K, S. P. Singla construction is constructing cable stayed roadway bridge in Basoli. For this project, Doka has delivered a formwork solution with Large-area formwork Top 50 with Climbing formwork MF240 and the Automatic climbing formwork Xclimb 60.
Basoli, situated on the right bank of River Ravi at an altitude of 571,8 m is in the northern most state of Jammu-Kashmir, India. The connectivity options available from Punjab and Basoli were mainly road via Basoli – Lakhanpur – Kathua through which River Ravi passes and a manual ropeway near Basoli. But with the commissioning of Ranjeet Sagar Dam, which is located about 14 km downstream of Basoli, both the road link from Basoli to Kathua and the ropeway link to Punjab got submerged. The alternative alignment from Basoli to Mahanpur having a length of 32 km has been constructed, but this has resulted in increasing the distance from Basoli to Lakhanpur from 47 km to 82 km and Pathankot from 46 km to 88 km.

The upcoming bridge will shorten this distance and will have a main span of 350 m, side span of 121 m, and a total length of 592 m. It overlooks a deep valley with a channel width of 250 m, which at high flow further widens to nearly 300 m.

Faster construction cycle

The site plan also includes constructing a 106 m high pylon. The span layout is symmetric (121-350-121 m), with pylons positioned at the top of the river banks, out of each from the water below. In order to keep the pylons fairly lightweight and also to accommodate any special detailing requirements, the section is a hollow box shape above deck level with a wall thickness of 0.5 m, and below deck the legs are solid. Pylon has a modified diamond configuration extending up to a height of 52.7 m and then a straight vertical portion of 53.3 m height making a total height of 106 m. Climbing formwork MF240 has been provided for each leg of the lower diamond shape base of the pylon, which will move on to the second pylon once the first pylon is cast up to the cross beam bottom.

Afterwards, for upper part of diamond shape of the pylon, Automatic Climbing formwork Xclimb 60 has been provided for each leg of the pylon and the same set will move on to the second pylon, once the first pylon is cast up to the transition area. For the straight portion, same set of Xclimb 60 with necessary modification will be used to cast the 53.3 m long vertical portion. This has ensured safety of the site crew, smooth and efficiency of operation at the site despite the erratic weather conditions.

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