GENERAL-Investigation Estimate for Improving the sharp curve at ParakkadavuMarika Junction-Investigation estimateInvestigation Work

OD128461/2025-2026:Data for inventory survey up to 12 meter wide road for survey work of collecting road inventories and recording in prescribed format attached based on chainage marking including marking chainage at 50m interval and taking details such as existing carriageway width, shoulder width, Type of shoulder ,width and location of approach road ,details of existing drains, culverts and bridges as given in the format attached, pavement conditions(details of potholes, raveling, fog seal ,slurry seal edge damage etc...) road safety measures (details of road sign, crash barriers, guard stones, delineator post, hazard markers etc) chainage-wise details of villages, exposed rock , stretches prone to land slide and all other existing retaining structures in road, including documentation charges etc.. as per direction of the officers at site

OD128427/2025-2026:Establishing DGPS control points on TOR steel bar of 10 mm dia fixed in RCC pillar of size 20X20X70cm embedded in concrete M15 up to a depth of 40 cm and the balance 30 cm above the ground shall be painted yellow

OD128431/2025-2026:Establishing traverse control points with elevations on pillar of size 15cmX15cmX60cm M20 grade RCC pillar with a nail fixed on the top surface. The pillars shall be embedded in the concrete. Spacing 250 m apart as a bench mark - control pillar. The spacing shall be maximum 250 m apart and inter visible. No separate bench mark need to be established

OD128432/2025-2026:Detailed topographic survey using Total station/mobile Lidar and preparation of site plan of minimum of 15m on either side of the centre line and taking cross section details at 25m intervals on straight roads and 10m interval on curves ( survey includes details of all features as mentioned in the scope of the in plain terrain work within the limit of survey). The survey shall be include establishing DGPS Control points at starting and ending of the project in pairs and at 4Km intervals (in pairs) in plain and rolling terrain and 2.5Km intervals ( in pairs) in hilly terrains. It shall also include establishing inter visible traverse control points note more than 250m apart with accuracy at least 1:10000 and desirable 1:20000 in distance measurement. Elevations on each of the control points connected to MSL of GTS Bench marks. Using precision levelling. Separate bench marks need not be established. Including Taking sufficient Color copy prints (5nos)

OD128451/2025-2026:Engaging labour for assisting and collecting samples

OD128452/2025-2026:Conducting sub soil investigation test at suitable intervals including taking samples grain size analysis, temperature measurement, atterberg limits, soaked CBR etc and submitting completed reports etc