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Hi, I am currently working on a tunneling project and we are about to embark upon quite a few rotary cored boreholes from the invert and crown of the tunnel to determine if there is any pressurized water bodies in the area. We are currently just using excel to mark out strata boundaries and...

Hi Guys, We are tunneling in London Clay and I was wondering if anyone had any papers or resources on discontinuities or fissuring. I have to log the tunnel face and I was just looking for some more background information. Also if anyone has any face logging experience or any resources on it -...

Well we have completed a pilot tunnel and now we are undertaking a series of boreholes drilled at angles from 43 to 60 degrees at the entrance of the pilot tunnel in the direction of the tunnel as part of the "strategy for depressurisations and incestigations SCL tunnels" to check if groundwater...

I am under the impression they are dewatering wells - we are looking to reach the lambeth group under the london clay which is going from very stiff clays to fine sand - I am assuming to prove there is no water or check if there is... do you know of any theory papers or background I could read...

Hi Guys, Am currently working on a tunnelling project in london and we are about to do some depressurization probes and I was hoping someone might have some more info on what this entails and the background science on it. Any books or resources anyone can suggest? Cheers Seenan

Hi Guys, Have started the new position and I am enjoying learning about the tunelling procedure etc. We are tunelling in London Clay and in part some of the Lambeth group, Does anyone know of any good resources for tunnelling in clay and the associated works. We are about to do some...

Sorry to have worried you miningman, I should imagine that for such a large project the people who are interviewing me and checking my credentials would be competent enough to make sure I am not "in over my head". Of course I will be a junior engineer or principal not a senior by any stretch...

Hi Guys, I have been a geotechnical engineer for about 5 years now but have never done anything tunnel related. Now I have got a job as a Geotech on the crossrail project in London which is kind of like a new underground line. I was wondering if anyone knows of any good books to read or any...