सुर्यविनायक-धुलिखेल, धुलिखेल-सिन्धुली-बर्दिबास सडक आयोजना
Banepa-Sindhuli-Bardibas Road Sector
The construction of Banepa Sindhuli Bardibas Road started in November 1996 with grant assistance from the Government of Japan. The main objective of this road is to connect the Capital city of Kathmandu with the Eastern Terai and hence link to neighboring cities in India. This road link is not only expected to provide an alternate link to Kathmandu with the Terai but it is also expected to bring considerable socio-economic changes along its corridor. This road joins Dhulikhel along the Arniko highway to Bardibas along the East-West Highway with a length of about 158 km. For the construction purpose, this road has been divided into four sections.
• Section I Bardibas- Sindhulibazar section (37 Km)
• Section II Sindhulibazar- Khurkot section (39 Km)
• Section III Khurkot - Nepalthok section (32 Km)
• Section IV Nepalthok-Dhulikhel section (50 Km)
Schematic Diagram of Banepa Sindhuli Bardibas Road (Road are only computer graphics)
Out of these sections, the construction of the Bardibas - Sindhuli Bazar section started in November 1996 and was completed in March 1998. The construction of this section included 9 numbers bridges and 17 numbers of causeways over the 37 km of road, which was constructed in 1987. This section has been open to traffic since its completion in 1998.
The construction of the Nepalthok-Dhulikhel section started in April 1998 and is under construction. This section includes the construction of 50 km of road with 5 numbers bridges and 6 numbers causeways. Out of 50 km, 34 km section of this road has already been completed and is already opened to public traffic while rest of the road is expected to be complete by March 2003.
The construction of the Sindhulibazar-Khurkot section started in January 2001, this section includes the construction of 39 km of road with a bridge and 3 numbers of causeways. Earthwork over 12.5 km of this road section has been completed. This section is expected to be complete by 2007.
The construction of the Khurkot - Nepalthok section has not yet been started and is expected to start soon.
After the promulgation of the Environmental Protection Act (EPA) for the first time during the basic design of section II Sindhulibazar Khurkot section, a Complete Environmental Impact Assessment was conducted. Extensive discussion on various aspects of environmental issues was discussed with the local people and their concerns are properly addressed. Furthermore, various slope stabilization techniques have been adopted, this includes the use of retaining and breast walls, crib works, gabion works, geotextiles and most interesting being the bio-engineering works which includes the locally available techniques like plantation of trees, shrubs including turfing and the soil seeding method imported from Japan. Though initially this technique has been found little expensive because most of the materials used in this method are imported from Japan and for making this method economical effort has been made to use the locally available materials so that this method could be extensively used in Nepal.
In order to effectively address the most common local issues related to local drinking water supply and irrigation channels to the local fields. This project has taken this challenge to properly relocate the existing drinking water supply line and the irrigation channels so that the effect from these could be minimized. Extensive discussion with the locals regarding the environmental issues has been very useful for the project, however, the late realization and awareness in these issues is still a challenge to the project to address issues to be faced in later stages of the project execution.
The project for the construction of Sindhuli Road with its total length of 160km, connects Dhulikhel on the Arniko Highway where 31km eastward from Kathmandu city the capital of the country to Bardibas on the East-West Highway crossing the Terai Plain and the way to the border of India is recognized as one of the most important routes of the SRN.
The construction of Sindhuli Road was carried out under the grant assistance of the Government of Japan (GOJ) from November 1996 to 2015. The entire road has been divided into four (4) sections, i.e., Section I: Bardibas-Sindhuli Bazar (L=37km), Section II: Sindhuli Bazar- Khurkot (L=36km), Section III: Khurkot-Nepalthok (L=37km), and Section IV: Nepalthok-Dhulikhel (L=50km).
Section I : Bardibas - Sidhuli Bazar (37km)
Section I was constructed to gravel road by GON with the equipment and cash assistance of the Government of Japan(GOJ) in 1982. Detailed Design was started in August 1995. During November 1996 – February 1998 comprising of the construction of nine (9) bridges and seventeen (17) causeways with their associated approach roads have been constructed with grant aid of GOJ, were completed in March 1998. This section was already upgraded to Blacktop road by DOR.
Section II : Sidhuli Bazar - Khurkot (Bara) (36km)
The first 6km from Sindhuli Bazar (Elev.; 500m) of this Section II follows the terrace and bank of Gwang River and it ascends for about 800m till it reaches Sindhuli Gadhi (Elev.;1350m) located in Mahabharat Range and descends towards Khurkot. Construction of this road was started in Dec. 2012 and completed in Jan. 2015.
Section III: Khurkot - Nepalthok (37km)
This section follows the right bank of Sunkoshi River, a principal tributary of the Sapta Koshi River. Temporary track road for light vehicles of this section has been completed in February 2009. This section consists of the construction of a road with a total length of 37km is located in the Sindhuli district was completed in 2015.
Section VI: Nepalthok - Dhulikhel (50km)
Section VI connects Nepalthok with Dhulikel in Araniko Highway (H03). The road passes through the ridge up to Bhakundebesi (22km) and it follows the bank of Dapcha River, fore next 5km. The road then follows the bank of Roshi River, for the rest of 23km, comprising five (5) bridges and eight causeways. The construction of this section was started in 1998 and completed in 2003.
OUTLINE OF THE DESIGN
Sindhuli Road is planned to cross the Mahabharat Range with EL. 2,000 - 2,500m height of the mountains and severe condition of the new construction road passing steep terrain and fragile soil in subtropical area. Moreover, the project has secured the environmental conditions along with the site, such as reducing tree cutting and plantation, maintenance of the irrigation facilities, reducing the influence of crops and fruits, protection of the rare animals and plants due carrying out an environmental protection policy of GON.
◆Class of the Road: National Highway No.6 (nominated as an Asian Highway)
◆Divided into four (4) sections for step-wise construction
● Section I: 37 km between Bardibase and Sindhuli Bazar
Passing Terai Plain and mainly bridges construction
● Section II: 36 km between Sindhuli Bazar and Khurkot
Crossing the most chokepoint of high mountain terrain
● Section III: 37 km between Khurkot and Nepalthok
Passing steep hillside mountains along Sunkoshi River
● Section IV: 50 km between Nepalthok and Dhulikhel
Environmental difficulties & along flooded Roshi River
◆Road Length: 160 km
◆Design Speed: 20~40 km/hr (20 km/hr for hairpin curve and winding alignment area surrounding Dhulikhel)
◆Carriageway Width: 4.75~5.50m at the mountain range and
6.50 m at plan area
DBSD and concrete or AC pavement at hairpin curves
◆Maximum Grade: 10%
● Bridge: 15nos. (Total length: 1,030m, Steel 5nos., Reinforced concrete: 10ns.,
● Flood Way (Causeway) Box type 14 nos., Slab type 25 nos.
● Road Structures as follows:
● Retaining wall for Embankment: Gravity type, Wet-stone masonry wall, Gabion wall, Geotextile earth-reinforcing wall, Vegetation, Bank protection/Foot Protection, Vegeta- tion
● Slope protection for cutting: Crib-work, Shotcrete, Wet- stone masonry, Vegetation
● Drainage Structure: Side ditch, Irrigation channel, Cross drain pipe, box culverts, Inlet, and Outlet channel
● Traffic Safety Facility: Guard Block (Concrete Barrier), Delineator Post, Traffic Sign, and Passing Places
CONCEPT OF DESIGN AND CONSTRUCTION
Sindhuli Road project was carried out with the following main concepts;
1) To maintain an all weathered national highway by ensuring smooth and safe traffic operation
2) To minimize road structures and maximize utilization of locally available material so that construction cost can be minimized as the Japanese Grant Aid project
3) To construct sustainable roads by applying adequate slope protection and drainage so that maintenance cost is minimized in consideration of the financial situation of Nepal
4) To minimize the impact on the natural and social environment and to contribute to the local community through increased employment opportunity
5) To transfer the technology concerning the disaster prevention (BOSAI) of roads through the construction
Sindhuli Road was planned by the realistic concept of road planning taking into consideration of the limited budget and the objectives of the project.
Therefore, a concept of “Environmental Friendly construction” was introduced in the road planning for the project. This concept will be realized for the plan of design speed, road width, alignment plan, bridge, and road structures as followings,
1) Application of rather raw design speed of 20 to 40 km/hr, and 1.5 traffic lanes of the minimum 4.75 meters width road as an exceptional case in order to avoid the big scale of earthworks and long slope treatment.
2) In-depth study of the project route not to pass or affect the potential hazard are with full utilization of prepared “Hazard Map”, and the application of appropriate slope protection or countermeasures against the possible road disaster.
3) Causeway structures are adopted at crossing points of rivers to minimize the budget adjustment for the maintainability and extensibility for the future traffic demand.
4) On the structure design, not only to minimize the construction cost but also raise the future maintainability to use local materials/products and contribute to the local community through increased employment.
The running distance of traffic from Kathmandu to the Terai Plain area blocked by the Mahabharat Range is reduced by about 150 km after the whole of the Sindhuli Road is constructed. Roundtrip of Kathmandu and Central Terai area that requires two days trip is able to be done in one day.
Past Rout through Narayanghat-Muglin Road: 340 km, 9.0 hrs.
Sindhuli Road Route: 190 km, 5.0 hrs.
Reduced Distance: 150 km, Reduced Time: 4.0 hrs.
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