Home -> Forums -> Construction -> Cracks -> Repair of underground Water storage sump

Repair of underground Water storage sump

Tue Apr 24, 2012Total posts : 3
NV MANI
NV MANI
Join date: Apr 2012
Topic: Repair of underground Water storage sump

Dear friends,
The underground sump (11000 litres) at my house receives drinking water supplied by city's metro water supply.
Unfortunately it is noted recently that the water inside sump is seen blackish and contaminated by getting mixed with outside drain water,probably water getting entry through the tree roots.
The roots from nearby tress have penetrated through side walls of water storage sump.The use of sump is therefore discontinued and the incoming valve is kept closed.
T
he top concreted floor is paved with tiles.The manhole to enter the sump is small to assess the nature and exact extent of damage. Moreover there is no  visibility even if inspection lamp is used.
It is practically difficult to inspect the defect and the only option could be to cut open the top concreted portion with flooring
(6" thickness) which is quite expensive and time consuming. 

Shall be very thankful to receive advice as how the sump can be repaired and restored at least expense?

Regards,
N.V.Mani.

Sat Apr 28, 2012Post  #1
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008

Dear NV

          After reading contents I am in view that firstly clear the tank side from out side where tank is damaged by roots. Clear the roots and repair the damaged portion. The other near by roots also be cut not to damage in future. Test the water of tank after repair, if it is coorect than fill the excavated portion.

 
Mon Apr 30, 2012Post  #2
NV MANI
NV MANI

Join date: Apr 2012
Post subject: Lining with RCC internal to sump

Dear Sri Gupta,
Thank you very much.
Due to space and access constraints,my sump cannot be excavated and approached from out side. The sump is located just at the main entrance. The flooring above is concreted and paved with tiles.
Please advise, whether after removal of roots ,cement plastering repair of wall cracks,waterproofing etc from inside sump, can I construct an RCC lining internal to sump? I doubt whether concreting in confined space inside sump could be feasible / advisable?
Regards,
N.V.Mani

 
Tue May 01, 2012Post  #3
NV MANI
NV MANI

Join date: Apr 2012
Post subject: RCC lining internal to sump


Due to space and access constraints,my sump cannot be excavated and approached from out side. The sump is located just at the main entrance. The flooring above is concreted and paved with tiles.
Please advise, whether after removal of roots ,cement plastering repair of wall cracks,waterproofing etc from inside sump, can I construct an RCC lining internal to sump? I doubt whether concreting in confined space inside sump could be feasible / advisable?
Regards,
N.V.Mani
 

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