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What is the purpose of providing shoes in prefabricated drains?

Shoes are normally installed in prefabricated drains for the following reasons:

(i) It avoids the entry of soils into the mandrel by sealing it during the installation of drains.

(ii) It performs like an anchor to retain the drains at the designed depth and to stop the drains from being pulled out during the withdrawn of mandrels after driving the mandrels into ground.

However, the inclusion of shoes in prefabricated drains tends to aggravate the problem of smear effect because the shoes are usually larger in size than mandrels.


This question is taken from book named – A Self Learning Manual – Mastering Different Fields of Civil Engineering Works (VC-Q-A-Method) by Vincent T. H. CHU.

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Kanwarjot Singh

Kanwarjot Singh is the founder of Civil Engineering Portal, a leading civil engineering website which has been awarded as the best online publication by CIDC. He did his BE civil from Thapar University, Patiala and has been working on this website with his team of Civil Engineers.

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