Mumbai Metro Line 3 (MML3) Project of 33.5km underground metro, proposed from Colaba to SEEPZ at Mumbai in India. Underground Package UGC-07 is one of the 7 packages of MML3 project. Deep excavations for underground metro station construction carried out by conventional secant pile wall as earth retaining system. Secant pile walls formed by overlapping reinforced concrete piles with un-reinforced piles. In SEEPZ station at launching shaft location, construction of secant pile for entire length of station not possible due to delay in land acquisition. To make the excavation within available land, Rock penetration H pile proposed 30m away from the existing Head Secant pile wall across the launching shaft layout. In Rock penetration H pile, Structural beam used as reinforcement. Considering quick installation and the dismantling scheme, Rock Penetration H Piles proposed as retaining system across launching shaft. This paper describes the modelling of Rock Penetration H pile along with installing and dismantling scheme as retaining system in lieu of reinforced secant pile.
Subjects: Deep excavation, finite element Analysis, Ground Anchor, H-pile, PLAXIS, Retaining system, rock penetration, Secant Pile Underground Metro
Author: Nagarajan D., Senior Design Engineer, Raja Rajan K., Assistant Engineering Manager and Vijaykumar T., Head
Publisher: DFI