KIIFB-Construction of Chengannur bypass in Alappuzha district - Phase 2 stretch -Topographical Survey work -Investigation Work

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).

OD76001/2025-2026: 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 reinforcedwith 4 nosof 8 mm dia longitudinal bars and 6mm dia stirrups @ 0.15m c/c, firmly fixed inposition bymeans of PCC of 0.1m wide and 0.4 m deep around the pillars in M15 grade concretebelow ground level including painting 2 coats on exposed surface with synthetic enamelpaint

OD86396/2025-2026: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

OD76004/2025-2026:To carry out DGPS survey to establish primary control points - it includes observation of raw data by using dual constellation GNSS receiver, processing, net work, adjustment and submission of data in WGS 84 datum and UTM/TM projection system including traverse report ( One intervisible pair per 5 Km)

OD86418/2025-2026: To carry out Traverse to establish horizontal control traverse stations on the proposed road stretch running through from one DGPS station at every 2.50 km using electronic total station instrument at maximum of 250 m interval with an accuracy of 1 in 10000 and back to close, which includes submission of hard and soft copies as per IRC standards

OD76002/2025-2026: Fly levelling to shift levels from given Bench mark value to next Bench mark station to horizontal traverse station and available permanent structures all along the road for the elevation purpose by closed circuit which includes submission of the hard and soft copies as per IRC Standards

OD76005/2025-2026:Survey work using total station - in plain and open area with hindrance to line of sight contour intervals with 5mx5m ( For road work) including all necessary safety measures and processing,perparation of drawings in AUTOCAD with various details in different layers and submission of finished drawingswith x,y,z, coordinates ensuring all objects , break lines and spot levels, topographic survey data for creation of DTM of the surveyed corridor compactable with design software's like AUTOCAD CIVIL, preparation for LS and CS of road, bridges, culvets , drain etc submission of detailed survey data in MSEXCEL dxf,sdr format and all other relevant data in hard copy ( 5 sets) and softcopy and as directed by the engineer in charge.