RFP for BHOPAL & Narmadapuram Division - Madhya Pradesh ...

section testing shall involve carrying out deflection testing for each100 m long homogenous road segment along the road sections. Theselection of homogenous segment shall be based on the data derivedfrom pavement condition surveys. The total length of suchhomogenous segments shall not be less than 100 m per kilometre.The deflection measurements for the control section testing shouldbe at an interval of not more than 10 m.(iv) Test pits shall be dug at every 500 m and also along eachhomogeneous road segment to obtain pavement composition details(pavement course, material type and thickness) so as to be able tostudy if a correlation exists between deflection and composition. Ifso, the relationship may be used while working out the overlaythickness for the existing pavement.(v) Benkelman Beam Deflection surveys may not be carried out forseverely distressed sections of the road warranting reconstruction.The Consultants, immediately upon the award of the contract, shallsubmit to MPRDC the scheme describing the testing scheduleincluding the interval. The testing scheme shall be supported by datafrom detailed reconnaissance surveys.(vi) In case, the Consultants wish to use any acceptable method(s) otherthan Benkelman Beam deflection technique for the evaluation ofpavement strength, details of such methods or innovative features fordeflection testing using Benkelman Beam technique along with themethodology for data analysis, interpretation and the use of suchdata for pavement overlay design purposes using IRC or any otherwidely used practices, such as AASHTO guidelines, should be gotapproved by MPRDC. The sources of such methods should beproperly referenced.4.9.3.3 Subgrade Characteristics and Strength4.9.3.3.1 Based on the data derived from condition (surfacecondition, roughness) and structural strength surveys, the projectroad section should be divided into segments homogenous withrespect to pavement condition and strength. The delineation ofsegments homogenous with respect to roughness and strengthshould be done using the cumulative difference approach(AASHTO, 1993).4.9.3.3.2 The data on soil classification and mechanicalcharacteristics for soils along the existing alignments may alreadybe available with the PWD. The testing scheme for the wideningof existing road within the ROW is, therefore, proposed that theConsultants shall test at least three sub-grade soil samples for eachADB-IV44