New Mahatma Gandhi Setu Patna Layout.Pdf
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FINAL EIA EMP Construction of New 4-lane Bridge (Parallel to the Chapter -2 Project Description REPORT Existing MG Setu) with its approaches from km 0/000 to km 14/500 across river Ganga on NH-19 at Patna in the State of Bihar on EPC mode 2 Project Description 2.1 Introduction The existing Mahatma Gandhi Bridge (MG Setu) was constructed about 34 years ago over the Ganges River in order to connect Patna to the other side of river. After completion, it became part of NH-19. It is one of the longest bridges in India. The Hajipur –Patna section of NH-19 is in Bihar. The NH-19 originates at UP Border and terminates in Patna via Chabra. The present project road is about 15 km length i.e., from km 207.20 (Hajipur) to km 222 (Patna). There is existing MG Setu which is four lane Bridge of 5.575 km length between km 212.72 to 218.295 with approaches on Patna side 3.5km length and Hajipur side 5km approximately. The government has planned for construction of New 4-lane Bridge (Parallel to the Existing MG Setu) with its approaches from km 0/0 (KM 222 of NH-19) to km 14/500 (Km 207.2 of NH-19) across river Ganga on NH-19 at Patna in the State of Bihar on EPC mode. 2.2 Type of Project: Since this is a construction activity for making a bridge over the Ganga River, it falls under the Category B of Township and Area Development project 8(b) as per EIA notification 2006. The total area of the proposed project is 6,45,361 sq-m and break-up of the same are as follows: Built-up area of Bridge - 2,08,095 Sqm, Approach road – 2,23,857 Sqm, Viaduct – 69,309 Sqm, Toll plaza – 1,44,100 Sqm 2.3 Need of the Project The existing Mahatma Gandhi Bridge (MG Setu) was constructed about 34 years ago over the Ganges River in order to connect Patna to the other side of river. After completion, it became part of NH-19. It is one of the longest bridges in India. The bridge has 46 spans each with length 121m. Each span has two cantilever beams on both sides which are free to move at the ends. The Spans are connected by using a Protrusion which is free to move longitudinally also along the river flow. In upwards and downwards direction it is such that it allows vibration to transfer smoothly to the next span while vehicular movement without much discreteness. Due to heavy traffic movement and being the only bridge to cross Ganges river the bridge is used heavily now. Hence it has started vibrating with higher amplitude than it was designed to. Also, in many spans the cantilever beams were found to have sagged at ends. So, the Setu is now stressed beyond limit under the weight of heavy vehicles constantly plying over it from Patna and North Bihar and threatening its existence. Poor maintenance, coupled with wear and tear caused by the unprecedented surge in traffic, has made the structure vulnerable. If a larger crack develops, it will sever the lifeline between the state capital and north Bihar. Considering the significant role, the Ganga Setu has been playing for decades in people's lives in this region, it is unimaginable to think of Patna skyline without Mahatma Gandhi Setu. The MORTH has also undertaken rehabilitation of existing MG Setu in a separate work. CPTL 7 FINAL EIA EMP Construction of New 4-lane Bridge (Parallel to the Chapter -2 Project Description REPORT Existing MG Setu) with its approaches from km 0/000 to km 14/500 across river Ganga on NH-19 at Patna in the State of Bihar on EPC mode 2.4 Location (Map Showing general location, specific location and project boundary with project layout) with coordinates) Figure 2-1: Location Map Figure 2-2: Depiction of Latitude and Longitude of the Site on Google Earth CPTL 8 FINAL EIA EMP Construction of New 4-lane Bridge (Parallel to the Chapter -2 Project Description REPORT Existing MG Setu) with its approaches from km 0/000 to km 14/500 across river Ganga on NH-19 at Patna in the State of Bihar on EPC mode Figure 2-3 : Layout of the Project Figure 2-4: Site Photographs CPTL 9 FINAL EIA EMP Construction of New 4-lane Bridge (Parallel to the Chapter -2 Project Description REPORT Existing MG Setu) with its approaches from km 0/000 to km 14/500 across river Ganga on NH-19 at Patna in the State of Bihar on EPC mode 2.5 Size or Magnitude of Operation This project includes the Construction of 5634 m long 4-lane major bridge at 38mts upstream of the existing 4-lane Mahatma Gandhi Setu (M.G. Setu). The new major bridge shall be provided as extradosed bridge having minimum main spans of 242.13m with appropriate end span. The new bridge shall have minimum navigational requirement of 100m for horizontal clearance between piers and vertical clearance of 10m above HFL. The navigational clearance shall be secured in consideration of old bridge’s piers as well. Total approaches of 8.866 km length (3.380 km on Patna side and 5.486 km on Hajipur side) shall be developed as eight lane divided carriageway highway (4 –lane connecting new Ganga Bridge and 4 – lane connecting old MG Setu) along the project alignment. The Patna side approach road includes new 1565 m long 4 - Lane viaduct (parallel to Existing Elevated structure), one 112 m long 4 - Lane ROB (parallel to existing ROB) and Hazipur side approach road includes new 101.60 m long 8 – Lane Flyover, one Toll Plaza (minimum 16 + 16 lanes including 1+1 ODV lane), Mahatma Gandhi Setu Museum, One LVUP, 3 Nos. of VUP and also have service roads, footpaths etc. in the project. As this is a big construction project, salient features of the project components are being described hereunder. A copy of the DPR is being attached as Annexure-2 for the reference. The project Highway shall be developed as 8 – lane divided carriageway from km 0/000 to km 14/500 on NH-19. The new 4 - lane Ganga Bridge and its approaches shall primarily cater one side traffic from Patna to Hajipur, whereas existing 4 – lane MG Setu and its approaches shall primarily cater other side traffic from Hajipur to Patna after completion of the Project. Existing New Length Covered Covered From To Improvement Work Remark (m) Area Area (sqm) (sqm) Existing road to be improved with widened median, RE Approch road 0 1621 1621 Walls, improve or restore service roads with Footpaths 49,129 48,131 of the bridge and Drain and Utility Ducts at Patna 1621 1733 112 Construction of New ROB parallel to existing ROB 2,128 2,240 New ROB Existing 4-lane road in the approaches of ROB to be Approch road 1733 1815 82 improved as 8-lane with new 4-lane ROB approach and 1,558 3,526 of the bridge service road on right hand side at Patna Existing 4-lane Viaduct to be improved as 8-lane with Viaduct at 1815 3380 1565 new 4-lane Viaduct and service roads with Footpaths and 30,121 69,309 Patna Drain and Utility Ducts Constrcution of New 4-lane Bridge parallel to existing MG New bridge of 3380 9200 5820 112,908 205,855 Setu Ganga river 9200 10300 1100 New Toll Plaza @ Km 9+710 with approaches 20,900 144,100 Toll Plaza Approch road Existing road to be improved as 8-lane with service roads 10300 14500 4200 79,800 172,200 of the bridge and ramp with Footpaths and Drain and Utility Ducts at Hazipur Construction of New 4-lane Bridge and development / construction of existing Approaches to 8 – lane divided Carriageway CPTL 10 FINAL EIA EMP Construction of New 4-lane Bridge (Parallel to the Chapter -2 Project Description REPORT Existing MG Setu) with its approaches from km 0/000 to km 14/500 across river Ganga on NH-19 at Patna in the State of Bihar on EPC mode 2.5.1.1 Width of carriageway of components shall be as under: - i. For Approach Roads: 8-lane Approach Road Sections (Combining Left and Right Carriageway) Lanes width 2x14.0m = 28.00m Cross Sectional Elements: Main Paved shoulder ----- Carriageway Kerb Shyness 2x2x0.5m = 2.00m 8-lane Approach Road Sections (Combining Left and Right Carriageway) Total carriageway 28.0+2.0 = 30.0m Crash Barrier 2x0.50m= 1.0m Central Median (Raised) Varies from 1.5m to 4.0m ii. For ROB and Viaduct Sections:- 4-lane ROB and Viaduct Sections (LHS Carriageway) Lanes width 1x14.00m = 14.0m Paved shoulder ----- Kerb Shyness 2x0.50m = 1.0m Cross Sectional Elements: Total carriageway 14.0+1.0 = 15.0m Main Carriageway Inspection/Maintenance 1x1.50m = 1.50m Path/Footpath Crash Barrier 2x0.5m = 1.0m Railing 1x0.5m = 0.50m Median ----- Total deck width = 18.0m iii. For Main Bridge: 4-lane Extradosed Major Bridge (LHS Carriageway) Lanes width 1x14.0m = 14.0m Paved shoulder 1x1.50m = 1.50m Kerb Shyness 2x0.50m = 1.0m Total carriageway 14.0+1.5+1.0 = 16.5m Inspection/Maintenance Path/Footpath 1x1.50m = 1.50m Cross Sectional Elements: Main Crash Barrier 3x0.5m = 1.50m Carriageway Pylon Cable connectors 2x1.0m = 2.0m Median ----- Total deck width = 21.50m CPTL 11 FINAL EIA EMP Construction of New 4-lane Bridge (Parallel to the Chapter -2 Project Description REPORT Existing MG Setu) with its approaches from km 0/000 to km 14/500 across river Ganga on NH-19 at Patna in the State of Bihar on EPC mode iv.