these are related to pavement design and distresses

1. NH-44 Pavement Design Issue
Design issue in BC:- IE has suggested 50mm overlay with DBM on the existing BT top to prevent the
cracks and rutting on the main carriageway. However, the concessionaire has not applied the same
on the existing BT top and construction has been completed at several locations. In this context the IE
has issued both NCR and letters.
Application of Truepav:- GFPM or other geotextile layer is to be provided at the joint of existing and
widening portion of the pavement. If the crack width is upto 20 mm, the milling may be done and the
depth of milling is up to the depth where the crack is present. In this context, IE has requested to have
joint site inspection for finalizing the exact chainages where milling has to be proposed for the
rectification of BT top in existing main carriageway and newly layed DBM top layers which is not
followed by the concessionaire.
Design issue for Slip Road:- In this context IE has requested concessionaire should design the slip
roads with the same design thickness as that of the main carriageway because the same traffic will ply
on both of them. They should define and give the chainages for the same.
Design issue for service road:- In this context, the independent engineer has already requested to
the concessionaire for conducting the FWD test to find out the exact structural condition and correct
thickness of overlay of the service road. In the present scenario due to the rainy season and improper
outlet of cross drainage, waterlogging has been found in most of the stretches of the service road on
both sides LHS and RHS. This is still not attending by the concessionaire.
However it is also noted that concessionaire has started the construction of service road without
submission of analysis of data that can substantiate the construction of service road is going with the
desired requirements which is required as per the provision of standards and specifications of codal
provision.
Pre COD:- Concessionaire has proposed 53 Kms of project length for Pre COD. Here only 47 Kms BC
has been completed by the concessionaire. Out of 47 Kms approx. 24 Kms (either LHS and RHS) NCR
has been issued, which is still not complied by the concessionaire.
The detail table on which NCR issued is as below:
S. No. Chainage
From To length Side
1 15+82 21+98 14195 LHS+RHS
2 23+4 25+95 1630 RHS
3 37+45 42+9 4816 LHS+RHS
4 43+85 58+05 389 LHS
5 59+4 60+55 150 LHS
6 61+2 68+4 2340 LHS+RHS
7 69+55 84+15 455 RHS
23975

2. Rutting, Cracking and slippage Location
IE had suggested the laying of 50mm DBM as an overlay on the existing main carriageway.
However, the concessionaire has not done the same on the site. As of now, rutting is observed
at several locations of the project. Photographs are also, herewith, attached for your reference.
In this context, we have issued several NCRs which are still not complied with by the
concessionaire. It is also anticipated that new locations of deficiency may be observed in future.
Currently, 7.1 KM rutting has been observed at the site.
1. 40+650 to 41+600 BHS
2. 49+000 to 49+600 BHS
3. 51+300 to 53+300 BHS