Settlement Analysis Of Embankment With Finite Element Method

Subject Areas : Analysis of Structure and Earthquake

Kamal Rahmani ¹ , Saber piroti ² , Arasto Armagani ³

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Received: 2007-05-24 Accepted : 2007-11-03 Published : 2007-12-22

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Abstract :

It is correct control and monitoring of modern embankment dams that are very vital in the geotechniqual constructions. The improvement of methods of stability control, using the effective stress and the measurement of ganglionic water pressure in embankment dams cause more the safety for this kind of dams. Nowedays there is such an idea that in stead of using of being safety factor against coast, designments must be done according to acceptable displacement. Analytic appraoach is using the finite element that is capable of fortelling the displacement parameters. Monitoring of dams with setting up accurate tools in the sensitive points and measurement various parameters such as pore water pressure and displacement points and measurement various parameters such as pore water pressure and displacement more or most common settlement and movement is possible. The displacement that occur all of a sudden at the end of this process can indicate be causes of enlargement of strain inside the dam body. This is the reason of undesirable decreasing of stresses or causes the start of an increasing impairment. By investigation of datas and using inverted analysis about the very unusual condition of mahabad dam, it has been tried to define the cause of this action in this thesis. From the start of construction an unnatural settlement and horizontal movement has occurred in it. During the construction 130 cm and during the exploitation 60 cm settlement has occurred in the foundation up to now. Also From the end of construction the maximum settlement and vertical movement are 150 cm and 100 cm respectively. In this paper monitoring of dams Mahabad with using acculate tools information and numerical analytic has consideratd. In performing numerical analytic from PLAXIS using finite element program. After construction cutoff walls and finishing operation injection in foundation of dam, rate of seepage from foundation is decreased and is according to numerical calculations in negligible extent and rate of seepage in body dam.