5 months ago
2
In a fewer years, with suburban trains snaking their mode done the crushed level and Velachery-St. Thomas Mount MRTS web connected the first, Chennai Metro Rail’s signifier II trains from Madhavaram to Sholinganallur volition tally connected the 2nd level.
The MRTS web from Chennai Beach to Velachery is being extended to St. Thomas Mount with 3 stations — Puzhuthivakkam, Adambakkam, and St. Thomas Mount.
The Chennai Metro Rail’s signifier II network’s corridor 5 from Madhavaram passes done Retteri, Anna Nagar, Koyambedu, Thirumangalam, Virugambakkam, Alandur, crosses St. Thomas Mount and Adambakkam, and terminates astatine Sholinganallur, covering 47 km successful total.
From St. Thomas Mount to Adambakkam, the MRTS and Metro Rail networks stock a communal elevated alignment for a abbreviated agelong of 500 metres. The trains of some networks volition transverse each different astatine 2 levels.
T. Archunan, manager (projects), Chennai Metro Rail Limited (CMRL), said the operation of this conception was completed a fewer days ago. “Initially, it was decided that Railways volition physique the viaduct for MRTS and CMRL networks. Then, plans changed. After constructing their viaduct, Railways handed implicit the enactment to the CMRL, who built their viaduct connected the 2nd level. The enactment that went down gathering this alignment was thing abbreviated of a challenge,” helium said.
“Be it gathering the viaduct implicit the suburban way oregon connected apical of the upcoming MRTS line, we constructed this 500-metre enactment amid utmost abstraction constraints. It turned retired to beryllium a time-consuming process and was carried retired by L&T. We had to specially customise and manufacture a light-weight launching girder for gathering this stretch,” helium added.
For 4 days betwixt June and July past year, suburban bid services were stopped from passing done the St. Thomas Mount presumption for implicit 2 hours astir midnight to transportation retired the operation of this stretch. Officials said they had sought peculiar support from the Commissioner of Railway Safety for the same.
“Since cranes couldn’t beryllium deployed for operation implicit railway tracks, a lightweight launching girder was brought successful to erect and spot the I-girders (a horizontal enactment beam). While the launching girders utilized successful the signifier II task for placing U-girders measurement astir 400 tonnes, the 1 utilized successful the tiny conception was 100 tonnes owed to the quality of the work. This was the archetypal clip they were utilized for I-girders,” Mr. Archunan added.
The CMRL usually uses precast structures for the signifier II project. Here, an objection was made. “We had to transportation retired what is known arsenic a ‘cast in-situ portal’ (a operation oregon framework utilized successful construction), wherein the portals were joined together, portion by piece, astatine the site. We developed a unsocial suspended enactment strategy successful which structural supports were derived from the existing piers of the MRTS network,” helium added.
