www.sefindia.org

STRUCTURAL ENGINEERING FORUM OF INDIA [SEFI]

 Forum SubscriptionsSubscriptions DigestDigest Preferences   FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups  RegisterRegister FAQSecurity Tips FAQDonate
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log in to websiteLog in to websiteLog in to websiteLog in to forum 
Warning: Make sure you scan the downloaded attachment with updated antivirus tools  before opening them. They may contain viruses.
Use online scanners
here and here to upload downloaded attachment to check for safety.

Cantilever retaining wall

 
Post new topicReply to topic Thank Post    www.sefindia.org Forum Index -> SEFI General Discussion
View previous topic :: View next topic  
Author Message
ramu_se
...
...


Joined: 30 Oct 2017
Posts: 75

PostPosted: Sun Jun 19, 2022 1:35 pm    Post subject: Cantilever retaining wall Reply with quote

Dear All,

Can we construct an L-shape cantilever retaining wall (without toe slab) to retain earth up to 10' height?

SBC of soil is 200 kN/m2.

The length of the retaining wall is 100' on all four sides.

Is it ok to construct a 100' length retaining wall without any column?

What is the maximum length of the retaining wall that can be constructed without any column support?

Kindly share any references to the design L-shape retaining wall.

Thanks & Regards,
Ramu.
Back to top
View user's profile Send private message
vikram.jeet
General Sponsor
General Sponsor


Joined: 26 Jan 2003
Posts: 3470

PostPosted: Sun Jun 19, 2022 4:34 pm    Post subject: Reply with quote

Toe-less cantilever retaining wall

Cantilevered ret wall without toe can easily be constructed. The stabilizing weight is available from back fill soil . Base width (only heel slab ) can be  fixed to provide required FOS against OVERTURNING as also Sliding , plus keeping Base pressure within SBC of founding strata.

However sometimes situation demand construction of Heel less retaining wall and it is very challenging as soil weight is not available. Sliding in this situation is a big problem and shear key is a must in such walls. It is also costly .

Whereas in case of Toe-less ret wall backfill causing EP  also give remedy in form of stabilizing weight over heel , but in case of Heel - less wall such remedy is not available.
Back to top
View user's profile Send private message
ramu_se
...
...


Joined: 30 Oct 2017
Posts: 75

PostPosted: Mon Jun 20, 2022 4:39 am    Post subject: Reply with quote

Thank you, sir.

In this type toe less retaining wall, what is the maximum length of the retaining wall that can be constructed?

If we construct 100' length or above do we need to provide any intermediate support?
Back to top
View user's profile Send private message
hsrai
...
...


Joined: 26 Jan 2003
Posts: 156

PostPosted: Mon Jun 20, 2022 2:04 pm    Post subject: Reply with quote

ramu_se wrote:
what is the maximum length of the retaining wall that can be constructed?

It can be any length.

ramu_se wrote:
If we construct 100' length or above do we need to provide any intermediate support?
  
No.
You need to provide expansion joints.
What type of project are you handling?
You mentioned four sides.

_________________
H.S.Rai
Back to top
View user's profile Send private message
ramu_se
...
...


Joined: 30 Oct 2017
Posts: 75

PostPosted: Tue Jun 21, 2022 5:12 am    Post subject: Reply with quote

Thank you, Sir.

Here I have attached the image for your reference.


The front area(100') of the site is 5' down from the road level and the end area(100') is 8' down from the road level.

To bring that to the road level we have to fill the earth by constructing the retaining wall all around the site and also the retaining wall shall be extended further up to 5' or 4' as a compound wall.

We are planning to construct toe less type of retaining wall with a stem thickness of 6" and a heel width of 12" and a depth 12"

SBC of soil is 200 kN/m2

Can we take 2' as the depth of the foundation and fill(up to 2') it with stones, and mud, and consolidate it to make the surface more rigid to use as a foundation, instead of taking the wall from 2' depth, can we construct the retaining wall (8') on the rigid surface? (to be economical).

Kindly guide me if this works well or let me know any other solution to make this economical.



Retaining wall.png
 Description:
 Filesize:  10.18 KB
 Viewed:  27 Time(s)

Retaining wall.png



Retaining wall.png
 Description:
 Filesize:  18.25 KB
 Viewed:  25 Time(s)

Retaining wall.png


Back to top
View user's profile Send private message
Rahul Ganguli29
SEFI Member
SEFI Member


Joined: 02 Jun 2016
Posts: 9

PostPosted: Tue Jun 21, 2022 4:42 pm    Post subject: Reply with quote

Kindly provide the others soil property details please

ramu_se wrote:
Thank you, Sir.

Here I have attached the image for your reference.


The front area(100') of the site is 5' down from the road level and the end area(100') is 8' down from the road level.

To bring that to the road level we have to fill the earth by constructing the retaining wall all around the site and also the retaining wall shall be extended further up to 5' or 4' as a compound wall.

We are planning to construct toe less type of retaining wall with a stem thickness of 6" and a heel width of 12" and a depth 12"

SBC of soil is 200 kN/m2

Can we take 2' as the depth of the foundation and fill(up to 2') it with stones, and mud, and consolidate it to make the surface more rigid to use as a foundation, instead of taking the wall from 2' depth, can we construct the retaining wall (8') on the rigid surface? (to be economical).

Kindly guide me if this works well or let me know any other solution to make this economical.
Back to top
View user's profile Send private message
vikram.jeet
General Sponsor
General Sponsor


Joined: 26 Jan 2003
Posts: 3470

PostPosted: Wed Jun 22, 2022 2:42 am    Post subject: Reply with quote

As already enlightened  by Prof HS Rai Sir,  a retaining wall can be constructed for any length without column supports if designed as stem and base rcc monolithic and self stable .

In case of column supported (predominantly  lateral for ep) retaining walls columns are required at 9 to 12' interval , these cols also go up for boundary wall.

In case of brick retaining wall either provide broad width self stable brick wall with offsets  OR  brick wall with rcc columns at 8 to 12 feet interval with horizontal rcc beams /bands at two three levels.

No need for expansion joint below GL but above , joints needs to be provided as per IS . Brick masonry walls about 10 to 15m, RCC walls 20 to 30m but pl see IS code on exp joints for conviction and correctness.
Back to top
View user's profile Send private message
ramu_se
...
...


Joined: 30 Oct 2017
Posts: 75

PostPosted: Wed Jun 22, 2022 4:42 am    Post subject: Reply with quote

Thank you Sir.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topicReply to topic Thank Post    www.sefindia.org Forum Index -> SEFI General Discussion All times are GMT
Page 1 of 1

 

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


© 2003, 2008 SEFINDIA, Indian Domain Registration
Publishing or acceptance of an advertisement is neither a guarantee nor endorsement of the advertiser's product or service. advertisement policy