Pre-limanary Report of Mewa Khola Bridge

Government of NepalMinistry of Physical Planning and WorksDEPARTMENT OF ROADSBRIDGE PROJECTBabarmahal, Kathmandu, Nepal

FIELD REPORT

Special Inspection And Design of Maintenance/Repair works ofTinthana Bridge Along Khasibajar - Kirtiputr - Tinthana in Kathmandu District.

Submitted By:Kathmandu, May 2014Gaurav Integrated Development Associates Nepal Ltd.Jv with GOEC Nepal Ltd & GIDAN P.LtdNew Baneshwor, KathmanduNepal

Date: 10 May, 2014To: Bridge ProjectDepartment of RoadsBabarmahal, KathmanduNepalSub:Field Report on Special Inspection and Design of Maintenance/Repair works of Tinthana Bridge along Khasibajar - Kirtipur Tinthana in Kathmandu District.

Dear Sir,

We are pleased to submit the two copies of Field Report of Tinthana Bridge along Khasibajar - Kirtipur Tinthana road in Kathmandu District. (Package No: BP/SID/2070/71-03)

Yours sincerely,

___________Mangal Raj ShresthaManaging Director

Feasibility Study, Detailed Engineering Survey ,Soil Investigation, Hydrological Study and Detailed Design of Mewa BridgeTABLE OF CONTENT

Page 1

Table of Contents

1.0Introduction11.1Background11.2Purpose of the Project11.3Bridge Site Location11.4Description of the Existing Bridge21.4.1Span Layout and Structural Types21.4.2Deck system31.4.3Substructure and foundation31.4.4Existing Utilities32.0Methodology42.1Generals42.2Field work42.3Personnel Involved in Field survey53.0Bridge Condition53.1Superstructure53.2Substructure74.0Deficiencies and Problems in the Bridge85.0Repair and Maintenance Programme96.0Conclusion and recommendations9

AppendicesAppendix A: Photographic RecordsAppendix B: Inspection Forms

Special Inspection and Design of Maintenance/Repair works of Tinthana Bridge along Khasibajar-Kirtipur-Tinthana Road.TABLE OF CONTENTS

Detailed Engineering Survey, Soil Investigation & Detailed Design of PRELIMINARILY DESIGN REPORT

Page 2 Introduction1.1BackgroundDepartment of Roads, the sole governmental organization is responsible for overall management of bridges along strategic Roads in Nepal. In this regard the Department of Roads, Bridge Project utilizes the services of engineering consulting firms in the Special bridge inspection and design of maintenance /repair works. As such the Consultant conducted a special inspection of the Tinthana Bridge crossing over Tinthana Khola in Kathmandu district.

The bridge has been continuously facilitating to pedestrians, local peoples and hundreds of vehicles of Naikap, Tinthana VDC and Machhegaun VDC in Kathmandu district. The bridge is in the full authorization of kathmandu Division of Department of Roads, Ministry of Physical Planning and Works which takes the responsibility of its management and maintenance.

The Bridge is a major crossing structure that bridges two VDCs namely Tinthana and Naikap. It was constructed during the governing period of Bhim Shum Shere Jung Bahadur Rana and as a part of British Aid Programme in 1930. The bridge is about 84 years of old, since then it has not been carried out any major repair and maintenance works. Though the bridge has not reached its design life, due to lacking of adequate maintenance and repair, it would non-operable after a few years if not maintained urgently.1.2Purpose of the ProjectThe inspection and assessment of the bridge was carried out to establish scope and costs associated with repair and maintenance of the bridge elements. In this regard the purpose of the report is to describe and report the overall condition of the Tinthana Bridge so that safe facility for the public could be provided. It also suggests on maintaining and improving the existing condition of the bridge by correcting structural and functional deficiencies associated with the bridge. The report will address the issues, problems identified and inspected in the field visit.1.3Bridge Site LocationThe Tinthana Bridge is about 9.7 Km far from Khasibajar, Kirtipur and lies in Kathmandu district of Nepal. This bride crosses the Tinthana Khola and lies along the Tinthana-Khasibajar-Kirtipur Roadway. Geographically; it is located at 274055.4 N Latitude and 851543.4 E Longitude.

It links ward no.01 of Naikap VDC at left bank and Tinthana at right bank. A birds eye view of the bridge site is shown as below: Tinthana BridgeNaikapTinthanaFlow Direction

Photo1: Location Map of Tinthana Bridge and vicinity map (source: Google Earth)

1.4Description of the Existing Bridge1.4.1Span Layout and Structural TypesThe Tinthana Bridge is a half through Truss Bridge constructed over the Tinthana Khola. The Bridge superstructure consist of two main steel truss resting on north and south abutments which has been founded on exposed rock. The bridge is a single span of overall length 25.0 m and its orientation is north-east to south-west.

Special Inspection and Design of Maintenance/Repair works of Tinthana Bridge along Khasibajar-Kirtipur-Tinthana Road.FINAL REPORT

Special Inspection, Assessment, Maintenance and Repair works of Tinthana Bridge.FIELD REPORT

Appendix- A: Photographic Records

Personnel involved in the inspection workUpstream truss

Extensive corrosion on web member at jointDeterioration of horizontal member of inclined support

Debris accumulation at truss memberRailing bar

View of left approaching roadRight Abutment

Vegetation growth at deckingExcessive vegetation growth left abutment

Left bank; left side

Special Inspection, Assessment, Design and Supervision of Maintenance and Repair works of Tinthana Bridge.

PHOTOGRAPHS

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Appendix B: Inspection Forms