RFP for appointment of technical consultant - Rsrdc.com

2. The Consultants shall collect information on high flood level (HFL), low waterlevels (LWL), discharge velocity etc. from available past records, local inquiriesand visible signs, if any, on the structural components and embankments. Localinquiries shall also be made with regard to the road sections getting overtoppedduring heavy rains.4.11.4.3 Condition Surveys for Bridges, Culverts and StructuresThe activities and deliverables forming part of bridge, Culverts and Structurescondition survey are specified below:1. The Consultant shall carry out a detailed inspection of every bridge and otherstructures such as railway over/under bridges, overpasses, underpasses and gradeseparators including flyovers. (For guidance, see IRC:SP:35 and IRC: SP:52).2. For each structure, the Consultant shall indicate the distresses observed, if any, inrespect of various components of the structures e.g. bearings, expansion joints,wearing coat, railings/crash-barriers, foundations, substructures (abutments, piers,pier caps), superstructure. On the basis of the distresses observed, the Consultantshall divide the structures into the following categories:(i) structures requiring reconstruction immediately as part of first stage development(all such structures shall be provided as new structures);(ii) structures where distresses are not so severe and reconstruction can be postponedto a subsequent stage say for a period of 7 to 8 years; if any major repairs arerequired in the meantime, these shall be so indicated for each such location;(iii) structures requiring repairs and/or rehabilitation (for such structures indicatepreliminary proposals for repairs and/or rehabilitation);(iv) structures requiring widening (for such structures indicate wideningmethodology);(v) structures that shall be retained.4.11.4.4 Geo-technical Investigations and Sub-Soil Exploration1. The Consultants shall carry out geo-technical investigations and sub-surfaceexplorations for the proposed Bridges / Road overbridges/tunnels/viaducts/interchanges etc., along high embankments and any otherlocation as necessary for proper design of the works and conduct all relevantlaboratory and field tests on soil and rock samples. The minimum scope of geotechnicalinvestigations for bridge and structures shall be as under:S.N. Description Location of Boring1 Over all length = 6 – 30 m One abutment location2 Over all length = 30 – 60mOne abutment location and at least oneintermediate location between abutments forstructures having more than one span.3 Over all length >60 m Each abutment and each pier locations.2. The deviation(s), if any, by the Consultants from the scheme presented aboveshould be got approved by RSRDC.3. However, where a study of geo-technical reports and information available fromadjacent crossings over the same waterway (existing highway and railwaybridges) indicates that subsurface variability is such that boring at the suggestedspacing will be insufficient to adequately define the conditions for design47