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Design of RCC Wall

 
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a121s
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Joined: 13 Jun 2011
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PostPosted: Fri May 31, 2013 6:08 am    Post subject: Design of RCC Wall Reply with quote

Dear Safiens,

I need to design a RCC wall of 31m height subjected to earth lPressure on one side and water Pressure on another side. kindly guide me in this regard.


Thanks and Regards
S. S. K.
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Dr. N. Subramanian
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Joined: 21 Feb 2008
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Location: Gaithersburg, MD, U.S.A.

PostPosted: Fri May 31, 2013 2:41 pm    Post subject: Re: Design of RCC Wall Reply with quote

Dear Er SSK,

31 m wall is abnormal. Kindly check the height. Your condition seems like it is a water tank. In that case you need to consider tank empty and tank full conditions.

I feel that when you are considering tank empty condition, you need to take both earth pressure as well as water pressure, for possible water table raise.

Best wishes,
NS
a121s wrote:
Dear Safiens,

I need to design a RCC wall of 31m height subjected to earth lPressure on one side and water Pressure on another side. kindly guide me in this regard.


Thanks and Regards
S. S. K.
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es_jayakumar
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Joined: 24 Nov 2011
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Location: Cochin

PostPosted: Fri May 31, 2013 2:59 pm    Post subject: Reply with quote

Dear Er SSK,

It is advisable to post the detailed diagram and details of the 31m high "wall" structure that  you refer.

E S Jayakumar
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a121s
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PostPosted: Sat Jun 01, 2013 4:10 am    Post subject: Reply with quote

Dear sir,

The wall is of 31m high , its for River Intake Structure in Hydel project, the total height of structure above foundation itself is 51m. Actually only one panel of 31m which is 12 m in length is the highest, rest all wall panels will be of lower height than this.


With Regards
S.S.K.
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es_jayakumar
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PostPosted: Sat Jun 01, 2013 5:12 am    Post subject: Reply with quote

If strong abutments / supports are available for the wall on either vertical sides, I think, some cylindrical wall (just like an arch dam) may be economical, if viable, considering the large span of 12m subjected to a huge hydrostatic pressure of 10x31 = 310 kN/sqm or saturated soil pressure at bottom, supposing the water side gets emptied and soil on the otherside is saturated or otherwise.(considering horizontal spanning of the wall).

E S Jayakumar
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gpsarathyy
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PostPosted: Sat Jun 01, 2013 7:20 pm    Post subject: Reply with quote

Dear Sefian,

For general design of RCC wall you shall refer any standard RCC design book. But here 31m high shows the criticality of the structure.

It is advisable to try for some special arrangement to acheive optimised design as suggested by Mr. Jayakumar.
You have to go for tapered wall to get economical design.

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G.PARTHASARATHY M.E. CEng(UK), MICE., MIE.,
CHENNAI
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Dr. N. Subramanian
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PostPosted: Sun Jun 02, 2013 6:17 pm    Post subject: Reply with quote

Dear SSK,

If the height is 31 m, then you have to use anchors at the top of the wall, or have relieving platforms.

Best wishes,
NS
a121s wrote:
Dear sir,

The wall is of 31m high , its for River Intake Structure in Hydel project, the total height of structure above foundation itself is 51m. Actually only one panel of 31m which is 12 m in length is the highest, rest all wall panels will be of lower height than this.


With Regards
S.S.K.
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es_jayakumar
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PostPosted: Mon Jun 03, 2013 8:40 am    Post subject: Reply with quote

Sir,

Methods of strength design (RCC) of such an unusual wall, in addition to ensuring stability of it may please be elucidated.

Regards,
E S Jayakumar
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