A New Method for Estimating the Deformability Modulus of Plastic Concrete-gotvand Dam zperience,Southwest Iran
We present a new technique for estimation of the elastic modulus of plastic concrete. A mixture of typical concrete with clay and bentonite, plastic concrete has been widely used in recent years for developing diaphragm cut-off walls in many dam projects throughout the world. It is important to properly estimate the elastic modulus of plastic concrete for dam safety because it should be close to the elastic modulus of surrounding soil to withstand the imposed deformations without breaking up. a review of the literature showed that the existing methods for elastic modulus calculation are not so efficient and the obtained data are scattered. After several experiments, we noticed that the main problem associated with the error in modulus estimation is the way that the strain is being measured during the test. Therefore, we proposed a new technique for strain measurement. To resolve the problem, we changed the stain gauge arrangement and shortened the distance used for strain measurement. The strain gauge was directly connected to the sample. Using the new technique, the stress-strain curve of plastic concrete was significantly improved and showed more stable and reliable behavior. Good time-trend was observed for age-elastic modulus relationship of specimens using the new method.
dam engineering plastic-concrete cut-off wall deformability modulus gotvand storage dam
Heidarzadeh M Sadr-Lahijani S.M Niroomand H
University of Tehran,and Senior Dam Engineer,Mahab Ghodss Consulting Engineers,No.17,Takharestan St. Head of Karkheh Dam Project,and Senior Geotechnical Engineer,Mahab Ghodss Consulting Engineers,No.17 Senior Geotechnical Engineer,Mahab Ghodss Consulting Engineers,No.17,Takharestan St.,Shahid Vahid Da
国际会议
The 1st International Symposium on Rockfill Dams(第一届堆石坝国际研讨会)
成都
英文
227-235
2009-10-18（万方平台首次上网日期，不代表论文的发表时间）