RITES Ltd., a Public Sector Enterprise under the Ministry of Railways (Employer) has invited tender for the work of “Topographical survey using DGPS, Total Station, Auto Level and preparation of drawings using mapping software & Utilities Collection for Feasibility and Detailed Project Report for Mass Rapid Transit System in Coimbatore” in two packages, package-I & package II. This tender document is for Package-II (Corridors C-2 & C-4).
- Tender Reference Number: RITES/UT/CO/COIMB/TGS/2020/2
- Estimated Cost of Work: INR 29.23 Lakh
- Document Download / Sale Start Date: 26-Jul-2021
- Document Download / Sale End Date: 03-Aug-2021
- Bid Submission Start Date: 26-Jul-2021
- Bid Submission End Date: 03-Aug-2021
- Bid Opening Date: 04-Aug-2021
Scope of Work:
- The work comprises “Topographical survey using DGPS, Total Station, Auto Level and preparation of drawings using mapping software & Utilities Collection For Feasibility and Detailed Project Report for Mass Rapid Transit System in Coimbatore Package-II (Corridor C-2 & C-4)”.
- Detailed topographical Survey will be done to represent all the visible details of ground using DGPS and Total Station and Auto level along the corridor. The work will involve carrying out a detailed Topographic Survey along alignment (not less than 100m wide or up to built up lines whichever is more). Buildings falling in 100m wide corridors shall be closed. The elements must be surveyed including documentation of geo coded X, Y, and Z coordinates in a GIS platform.
- The survey shall cover following features:-
- Built up line to built up line (and show setback as well) inclusive of all roads, road/rail track showing important structures with their height and storey including depth of foundation based upon local inquiry.
- Main roads, sub roads, and service lanes, as applicable.
- Signals /road marks.
- Intersection elements.
- Roundabouts.
- Medians / bollards / permanent barricades.
- Compound walls and each access point/gate.
- All utility (electricity, telephone etc.) poles/boxes.
- Overhead high-tension lines.
- Trees: to be indicated in 2 categories, above and below 30 cm of main trunk
- circumference (measured at 1 m height from ground level). A table showing location, type, their species, girth diameter, reference number duly shown on plan shall be made in separate AutoCAD layer. The trees at site to be numbered with paint as directed by Engineer-in-charge.
- Front facade of existing buildings/structures.
- Footpaths/pathways including all kerbs and level differences.
- Pavements.
- Adjoining Railway Stations/Level crossings with their type/Traction Mast/Signal Post.
- Manholes.
- Sign boards/markings.
- Storm water drains/Streams/Ponds/Nallahs/Culvert with type, span, HFL and Bed Level.
- River survey across the alignment using echo-sounder, as directed by Engineer-in-charge.
- Bridges: ROB/RUB/FOB with type and span.
- Service lines/cable ducts.
- Difference in levels wherever it occurs.
- Establishing true/magnetic north point with respect to each location.
- Establishing reduced/relative level for each item.
- Marking the outer dimension of all built up areas along the corridor, with plot numbers and ownership such as private, Govt, residential and commercial etc. within survey limits.
- The output data shall be provided in GIS and AutoCAD format. The Auto CAD drawings shall have different layers for different entities like Road, Rail, Spot/Ground levels, Drain, Building, Boundary Wall, Over Ground Utility and Under Ground Utility, Tree, Traverse Station, ROB/RUB etc. as instructed by Engineer-in-charge. X, Y, Z co-ordinates of all spot/ground points shall be provided in CSV file as directed by Engineer-in-charge with point numbers and feature coding as per list of codes given by Engineer-in-charge. Z co-ordinates are to be taken with due care and indicated accordingly. Utilities data shall be collected from concerned deptt. in hard copies of topo drawings separately prepared in 1:2000 scale in A2 size for each deptt.
- Location of approach roads, main roads, lanes etc. showing road / lane name, carriageway, footpaths, central verge, drains and the widths of all the main and approach roads and at locations where there is a sudden change in widths of roads shall be measured physically and marked on the drawings.
- Details of land along the route include their ownerships (Whether Government or Private) and uses such as residential areas, commercial areas, religious, parks, green areas, vacant lands etc.
- Details of open drains, nallahs, with bed levels and HFL’s.
- The plan shall show all buildings, type of building, such as temporary, permanent including number of storey and basement details.
- Survey of level crossings with their numbers, class, manned or unmanned, Road-Over- Bridges (ROBs), Road-Under-Bridges (RUBs) and Foot-Over Bridges (FOBs), Railway Bridges, Culverts etc. with their structural details, angle of crossing and road & rail levels.
- Details of railway tracks along the proposed alignment including take off points, curves, transitions, crossings, switches and other details including electrical structures with their distances from the existing railway tracks.
- Details of Religious structures such as Temple, Gurudwara, Mosque, Church, Monuments, Tombs, etc. clearly marking the railway boundary all along the corridor and giving cross reference of these structures with reference to the railway boundary.
- Traffic signals, light posts, bus stops, junction boxes (telephone and power), fire and water hydrants (fire-fighting and others), transformers telephone posts etc.
- Name of all adjacent colonies including number of houses, Jhuggie clusters with number of jhuggis along the route of the survey.
- Spot levels of terrain, critical levels including vertical clearances of Road-over-Rail and Road- under-Rail bridges, railway OHE facilities, top levels of (a) railway station buildings, (b)platforms and(c) both rails of each track. Rail levels shall be recorded at 25m intervals.
- Vertical clearances to power line or telephone/telegraph lines at crossings of roads/railway lines.
- Any other structure or details which the Agency may feel important and or as instructed by the Engineer should also be added.
- Corridor of Topographical survey should be matched with the proposed alignment marked on Map/Google Images. There may be occasion to repeat the topographical survey to match the corridor of the proposed alignment marked on Map/Google images or due to revision of alignment in small patches to avoid the structures coming on the proposed alignment marked on Map/Google images. No extra payment shall be made to the agency for the same.
- The contractor has to plan a survey based on layer concept so as to prepare a plan showing all existing and manmade features. All the text size, general layout of drawings, legend, scale etc. shall be as per sample drawing, which will be supplied by RITES during execution of work.
- It may be required to run sub-traverses to cover areas of interest for topography. These sub-traverses shall start and end on a control mark already established in the previous stage of the survey. Accuracy of this sub-traverse shall also be computed and properly documented.
- Accuracy of sub-traverses should also be the same as required for establishment of total station traverses. However, balancing of error is not required in case of sub-traverses for topographic survey.
- All measurements and detailing of features shall be taken by using Total Stations of minimum 1” (one second) accuracy as per DIN standard with data downloading facility of brands as specified above and shall be recorded directly on to it. The linear measurements shall have an accuracy of ± (5mm + 5ppm times baseline length).
- During topographic survey, all existing topographical details, such as buildings, village boundary, rivers, nallahs, canals, roads, railway lines, electric lines etc. shall be picked up as existing on ground with respect to reference frame established above. Spot levels shall be picked up so as to truthfully depict actual ground with spot level interval of the order of 25m or lesser. At points where the profile is changing, additional levels will be taken. All traverse stations shall be connected with TBM established at site using Auto levels with an accuracy of 6√K mm, where K is the circuit length in km.
- The contractor is also required to carry out leveling in isolated ponds or water logged areas or in the existing borrow pits filled with water.
- Necessary jungle clearance for proper execution of the work, wherever required, shall have to be done by the contractor at no extra cost.
Tender documents may be downloaded from CPPP website https://etenders.gov.in/eprocure/app and from RITES website https://www.rites.com.
Source: RITES-Tender
