Location

Arlington, Virginia

Session Start Date

8-11-2008

Session End Date

8-16-2008

Abstract

Construction of dam foundation of Bisalpur masonry dam on river Banas was posing a problem due to presence of medium and coarse sand in the river bed. In post monsoon period, though there remains very little surface flow in the river, but ipso-facto entire river flows through 10 to 12 m thick sand bed. Hence RCC diaphragm wall was conceived to play dual role i.e. to cut off the flow through the sand bed and also to act as coffer dam to divert the surface flow in the diversion channel. 60 cm thick RCC diaphragm wall has been constructed and used as cut off as well as coffer dams on u/s and d/s side of main dam. Wherever depth of diaphragm wall was less than 12 m, post tension anchors of capacity 135 Tons to 170 Tons at an inclination of 45 degrees, were provided through the diaphragm wall and sand bed and grouted in rock. Wherever depth of diaphragm wall was more than 12 m, it was designed as T shaped wall on principle of counter fort retaining wall. This coffer dam cum cut off wall had served its purpose and facilitated the construction of foundation and main dam of Bisalpur project.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Sixth Conference

Publisher

Missouri University of Science and Technology

Publication Date

8-11-2008

Document Version

Final Version

Rights

© 2008 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Anchored RCC Diaphragm Wall Coffer Dam for Bisalpur Dam (A Case - Study)

Arlington, Virginia

Construction of dam foundation of Bisalpur masonry dam on river Banas was posing a problem due to presence of medium and coarse sand in the river bed. In post monsoon period, though there remains very little surface flow in the river, but ipso-facto entire river flows through 10 to 12 m thick sand bed. Hence RCC diaphragm wall was conceived to play dual role i.e. to cut off the flow through the sand bed and also to act as coffer dam to divert the surface flow in the diversion channel. 60 cm thick RCC diaphragm wall has been constructed and used as cut off as well as coffer dams on u/s and d/s side of main dam. Wherever depth of diaphragm wall was less than 12 m, post tension anchors of capacity 135 Tons to 170 Tons at an inclination of 45 degrees, were provided through the diaphragm wall and sand bed and grouted in rock. Wherever depth of diaphragm wall was more than 12 m, it was designed as T shaped wall on principle of counter fort retaining wall. This coffer dam cum cut off wall had served its purpose and facilitated the construction of foundation and main dam of Bisalpur project.