Holdfast Training Services Trial Blog

This will be short and sweet and is a bit of praise for John Moran.

Situation – JHG have created a cofferdam and have a dewatering plan

Issue – It isn’t working

Serevena becomes involved and asks 3 questions:

1. Where is the flow net? Do we know/understand the flow path?

2. What is the ground all about? Where are the bore hole logs? Do we know the permeability?

3. What is our pump capacity? What are the depth of our sumps?

Answers to the above:

1. Don’t have one and therefore no understanding.

2. It doesn’t matter as the water leaking through the pile clutches is the biggest factor.

3. Not sure, very deep.

So, Serevena has an epiphany and remembers all about flow nets and groundwater control. Ex Cofferdam was worthwhile!

So I ask the senior project engineer about this. He tells me to get back in my box and that all we need to do is lower the sumps. That was the last plan and it didn’t work.  Until now we have been undertaking trial and improvement. This is going to change now, and I will make it happen!

John, do you fancy a bit of consulting work???