Awarded as the best online publication by CIDC

Vertical drains can be installed in square and triangular patterns. Which pattern is better?

Vertical drains are commonly installed in square and triangular patterns. The zone of influence of vertical drains (R) is a function of drain spacing (S).

For drains in square pattern: R = 0.546S
For drains in triangular pattern: R = 0.525S

The advantages of square pattern are that it is more convenient to lay out and manage on site. However, triangular pattern is the most popular one because it provides a more uniform consolidation between drains than square pattern.

Square pattern and triangular pattern of vertical drains


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.

Share this post

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.

If you have a query, you can ask a question here.

Leave a Reply

Your email address will not be published. Required fields are marked *

Ask a question