21 February 2023
Reinforced Soil Wall at Jalna, Maharashtra
Reinforced Soil wall with concrete panels as fascia were used in construction of ROB along with approach road for JNPT dry port at Jalna.
MacRes® system with concrete panels as facia and ParaWeb® as reinforcement were installed to construct Reinforced Soil wall.
Indian Port Rail Corporation Ltd. (IPRCL) proposed the construction of ROB along with approach road for JNPT dry port at Jalna between Parbhani – Manmad section of Nanded division of South-Central Railway in the state of Maharashtra. There was a 15.2m difference between finished road level and ground level. With ROW available, it was decided to construct partial height walls with a 2.0m high surcharge.
Analysis was carried out as per the guidelines set by IRC-SP102:2014 wherein external stability analysis covers the basic stability of the reinforced soil wall structure as a unit, whilst internal stability analysis examines the effectiveness of the geosynthetic reinforcement to hold the reinforced soil mass together so that the geosynthetic layers and soil function as a monolithic block. RS Wall was checked for global stability, external stability and internal stability while considering the angle of internal friction of both reinforced and retained fill as 32 degrees.
Due to the non-uniform ground at the site, a uniform bed of well-compacted filled up soil was first prepared with a compaction of 95% modified proctor’s density, followed by erection of panels on a levelling pad.
Maccaferri’s MacRes® system with concrete panels as facia and ParaWeb® as reinforcement were selected as the appropriate solution for the above problem. Paraweb® comprises polyester yarns encased in a tough and durable polyethylene sheath. Parawebs with strengths ranging from 30kN to 100kN were used in the project.
T shaped panels with corrugations were used as facia panels and bottom panels were half panels. Some special end panels and corner panels were also used. The connection between the panels and facia was done by a mechanically connected using patented polymeric cavity (MacBox) connector system.
The project was successfully completed in a period of 10 months and handed over to IPRCL.
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