Construction of Approach Road at Ramamangalam side for the Existing Koramkadavu Bridge in Ramamangalam Panchayath in Ernakulam Construction of Anakkayam Bridge and Pukalappara Bridge on Chalakkudy Anamala Road in Chalakkudy Constituency of Thrissur

Topographical survey

OD329009/2025-2026:Providing and fixing RCC pillars at every 250 m interval along the road, of size 0.15 m x 0.15 m, 0.45 m long, 0.15 m above ground level and 0.3 m below GL casted in M20 Grade concrete reinforced with 4 nos of 8 mm dia longitudinal bars and 6 mm dia stirrups @ 0.15 m c/c, firmly fixed in position by means of PCC of 0.075 m wide and 0.3 m deep around the pillars in M15 grade concrete below ground level including painting 2 coats on exposed surface with synthetic enamel paint

OD329008/2025-2026:To carry out Traverse to establish horizontal control stations on the proposed road stretch running through from one DGPS stations at every 2.5km using eletronic total station instrument at maximum of 250m intervel with an accuracy of 1 in 20000 which includes submission of hard and soft copies as per IRC standards.

OD329011/2025-2026:Fly levelling to shift levels from given bench mark value to next bench mark station to horizontal traverse stations and availablr permanent structures all along the road for the elevation purpose by closed circuit which includes submission of hard and soft copies as per IRC standards.

OD332688/2025-2026:Providing and fixing RCC pillars for DGPS control points of size 0.3 m x 0.3 m,0.5 m long, 0.1m above ground level and 0.4 m below GL casted in M20 Grade concrete reinforced with 4 nos of 8 mm dia longitudinal bars and 6mm dia stirrups @ 0.15m c/c, firmly fixed in position by means of PCC of 0.1m wide and 0.4 m deep around the pillars in M15 grade concrete below ground level including painting 2 coats on exposed surface with synthetic enamel paint

OD332689/2025-2026:To carry out DGPS Survey to establish primary control points- it includes observation of road data by using dual constellation GNSS receiver, processing,network,adjustments and submission of data in WGS 84 datum and UTM/TM projection system including traverse report (one intervisible pair per 5km).

site clearence

56.13:Providing access to the site clearing site and making good for surveying in order to provide clear line of site devoid of any hindrance due to vegetation etc. and clearing areas for station points (This item is applicable only for sites without access such as in case of new road formation, bridge and building sites at in accessible locations).

56.12.a:Total station surveying and preparation of site plan - Plain and open area without hindrance to line of sight with 1 m contour intervals , with 5m x 5m interval.

56.14.a:Cross sectional details - River.

56.15.a:Hydraulic Velocity Calculation - River.

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