Date
08 May 1984, 10:15 am - 5:00 pm
Abstract
Some seriously cracked and leaked earth dams in China have been successfully strengthened by the cast-in-situ concrete diaphragm at or near the dam axis through the dam embankment. The diaphragm is enabled to seal the leakage through concentrated seepage path in the earthfill resulted from the large voids or the cracks in cohesive earthfill as well as the leakage through the alluvium in dam foundation. The effectiveness of this strengthening method depends on the correct determination of the major seepage channels. Serious longitudinal cracks have occurred in some dams during excavating the slurry trenches and pouring concrete into them owing to the hydraulic fracturing effect of the drilling fluid and liquid concrete. After some modification of the construction technique the strengthening work was carried out smoothly. The cracks were closed after completion of construction work and the contact between the earthfill and diaphragm was satisfactory.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
1st Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1984 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Chonggang, Shen and Guocheng, Jiang, "Sealing Leakage of Earth Dam by Concrete Diaphragm" (1984). International Conference on Case Histories in Geotechnical Engineering. 32.
https://scholarsmine.mst.edu/icchge/1icchge/1icchge-theme3/32
Sealing Leakage of Earth Dam by Concrete Diaphragm
Some seriously cracked and leaked earth dams in China have been successfully strengthened by the cast-in-situ concrete diaphragm at or near the dam axis through the dam embankment. The diaphragm is enabled to seal the leakage through concentrated seepage path in the earthfill resulted from the large voids or the cracks in cohesive earthfill as well as the leakage through the alluvium in dam foundation. The effectiveness of this strengthening method depends on the correct determination of the major seepage channels. Serious longitudinal cracks have occurred in some dams during excavating the slurry trenches and pouring concrete into them owing to the hydraulic fracturing effect of the drilling fluid and liquid concrete. After some modification of the construction technique the strengthening work was carried out smoothly. The cracks were closed after completion of construction work and the contact between the earthfill and diaphragm was satisfactory.
