Volume I - Main Report
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Government of Nepal Ministry of Federal Affairs and Local Development Earthquake Emergency Assistance Project Kupondole, Lalitpur Central Level Project Implementation Unit (CLPIU) Contract No. Survey, Design & Cost Estimate of Khopasi - Dhungkharka - Chyamrangbeshi - Milche - Borang Road in Kavre District (Ch 14+055- 18+591.8 Km) VOLUME I - MAIN REPORT June, 2017 Submitted by ERMC (P.) Ltd. (Environment & Resource Management Consultant) New Baneshwor, Kathmandu, Nepal P. O. Box: 12419, Kathmandu Tel.: 977-01-4483064, 4465863 Fax: 977-01-4479361 Email: [email protected], Website: www.ermcnepal.com Detail Engineering Survey and Design of Khopasi - Dhungkharka - Chyamrangbeshi - Milche - Borang Road (Kavre) ACKNOWLEDGEMENT ERMC would like to extend special gratitude to all the concerned EEAP central Project coordination Unit and district team, officials of DDC, DTO and especially the local people of the project area who guided, advised, and cooperated ERMC and joined the survey team and guided/assisted during conduction of detailed engineering survey work. We also appreciate the contribution of all the individuals involved in this project works for their kind co-operation and help at every step of Detail Engineering Survey and Design of Khopasi - Dhungkharka - Chyamrangbeshi - Milche - Borang Road in Kavre District. Detail Engineering Survey and Design of Khopasi - Dhungkharka - Chyamrangbeshi - Milche - Borang Road (Kavre) TABLE OF CONTENTS CHAPTER I – INTRODUCTION………………………………………………………………………… 1 1.1 RRSDP Districts for Implementation ............................... Error! Bookmark not defined. 1.2 Objectives ...................................................................................................................... 1 1.3 Scope of Works ............................................................................................................. 1 CHAPTER II – METHODOLOGY………………………………………………………………………. 3 2.1 The Study Team ............................................................................................................ 3 2.2 Desk Study .................................................................................................................... 3 2.3 Identification and Selection of Roads .............................. Error! Bookmark not defined. 2.4 Meetings ........................................................................................................................ 3 2.5 Meeting with Local Level Stakeholders .......................................................................... 4 2.6 Detailed Engineering Survey, Design and Cost Estimate ............................................... 5 2.7 Field Verification of Design / Estimate ............................................................................ 7 CHAPTER III – THE PROJECT………………………………………………………………………… 8 3.1 Project District ................................................................................................................ 8 3.2 Description of Alignment ................................................................................................ 9 3.3 Population Served & Traffic Data ................................................................................. 10 3.4 Potential Area & Growth Centers ................................................................................. 10 3.5 Project Rationale ......................................................................................................... 11 CHAPTER IV – GEOLOGY AND GEOMORPHOLOGY…………………………………………….12 4.1 Geological Study .......................................................................................................... 12 4.1.1 Introduction ........................................................................................................... 12 4.1.2 Regional Geology and Geomorphology ................................................................ 12 4.1.3 Surface Geology ................................................................................................... 12 4.1.4 Slope Stability Condition ....................................................................................... 13 4.1.5 Engineering Geological Mapping .......................................................................... 14 4.1.6 Geological Hazard Mapping .................................................................................. 14 4.2 Construction Material Survey ....................................................................................... 14 Chapter V – HYDROLOGY AND METEOROLOGY………………………………………………... 15 5.1 General ........................................................................................................................ 15 5.2 Rainfall ......................................................................................................................... 15 5.3 Design Discharge ........................................................................................................ 15 5.4 Cross Drains ................................................................................................................ 15 5.5 Side Drains .................................................................................................................. 17 5.6 Selection of Cross-Drainage Structures Type .............................................................. 17 5.6.1 Pipe Culverts ........................................................................................................ 17 5.6.2 Floodway .............................................................................................................. 18 5.6.3 Slab Culverts ........................................................................................................ 18 CHAPTER VI – GEOMETRIC STANDARDS AND DESIGN………………………………………. 19 6.1 Road Classification ...................................................................................................... 19 6.2 Design Standard .......................................................................................................... 19 EEAP i Detail Engineering Survey and Design of Khopasi - Dhungkharka - Chyamrangbeshi - Milche - Borang Road (Kavre) 6.2.1 Design Speed ....................................................................................................... 19 6.2.2 Geometric Design ................................................................................................. 19 6.3 Horizontal Alignment .................................................................................................... 19 6.3.1 Horizontal Curvature ............................................................................................. 19 6.3.2 Super Elevation .................................................................................................... 19 6.3.3 Maximum Super Elevation Value .......................................................................... 20 6.3.4 Minimum Radius of Curvature ............................................................................... 20 6.4 Widening on Curves ..................................................................................................... 21 6.5 Stopping Sight Distance Sight Distance ....................................................................... 21 6.6 Vertical Alignment ........................................................................................................ 22 6.7 Gradient ....................................................................................................................... 22 6.8 Vertical Curve ........................................................................................................... 23 6.8.1 Summit Curves ..................................................................................................... 23 6.8.2 Valley Curves........................................................................................................ 23 6.9 Road Cross- Section .................................................................................................... 24 6.9.1 Cross Section Design ........................................................................................... 25 6.9.2 Shoulder Width ..................................................................................................... 25 6.9.3 Carriageway Width................................................................................................ 25 6.9.4 Formation Width ................................................................................................... 25 6.9.5 Right of Way ......................................................................................................... 25 6.9.6 Camber ................................................................................................................. 25 6.9.7 Pass Bay .............................................................................................................. 25 6.9.8 Carriageway width at culvert/ bridge ..................................................................... 26 6.9.9 Level of road embankment above hfl .................................................................... 26 6.9.10 Lateral Clearance ................................................................................................. 26 6.9.11 Vertical Clearance ................................................................................................ 26 6.9.12 Cut / Fill Batter Slopes .......................................................................................... 26 CHAPTER VII – ENVIRONMENTAL MITIGATION