As a court expert I have a case where I believe damages have been caused by construction vibrations (rock removal or micropile drilling with DTH hammer at 6 m from structure). I am looking for data about vibrations (PPV) caused by thes two construction activities. I attach a picture of the most...
Are you sure you are using the right wire ropes ? Connecting parts and wire ropes are designed as a whole with very strict tolerances. You should not use replacement wire ropes which are not strictly the right ones. If you are using tremie pipes longer than 70 m wire ropes get smashed because of...
Only drawback is that there is no way to check bearing capacty with driving formula as for driven pile. We generally drive the pile fast with vibratory hammer and then use an impact hammer for the final set. Make a load test if you use only vibratory hammer.
You can also talk to your students about an alternative called Texsol. It's a mixture of sand and continuous fiber showing both apparent cohesion (0.1 MPa) and a good friction angle. It's used as a retaining structure (can be theoretically vertical, but paractically limited to about 80°). See...
when drilling Under bentonite or polymer, the concrete coming from the bottom of the pile might be slightly contaminated with soil. This is why it is necessary to cast between 0.5 and 1 m above cut-off level. The concrete will be trimmed off at a later stage. In order to trim it off properly you...
Dynamic compaction has been used several times for such a case. You can expect the compaction process to lower the Platform about 25% of the waste thickness.
It has already been done, in my case replace bentonite slurry by BC slurry in a slurry wall 50 deep and 1 m wide. You must be sure that your CB slurry is stable which means good hydratation of mother bentonite slurry and enough cement ( around 180 to 200 kg per m3).Obviously you will get, just...
Each ground improvement method has its limits in terms of magnitude of load, thickness of layer to improve, grain size distribution, etc, etc. Each site is a particular site. Hence, each project is a prototype and you will not be able to replace engineering judgement by an Excel spreadsheet...
Richard
Any Site Investigation company in the UK will do the job. Hiring them might prove useful in the way that it's very likely that you don't need deep foundations. Your Structural Engineer is not a soil specialist. If anyway you need deep foundations see Roger Bullivant in the UK, they...
Have a look at Texsol
This material is a mixture of continuous thread and sand. It has an apparent cohesion of 0.1 MPa and a very high friction angle and can be used as a retaining structure almost vertical.
http://www.eiffageinfrastructures.com/texsol
It is probably a true story. One of my soil mechanics teachers told us in the seventies that you could guess how building were founded in Mexico : the piled ones had stairs going up from the street and those on mats had stairs going down !
"Destructif" means they used a destructive drilling method and were not able to put a description in front !
The problem is that they don't describe the destructive method they used and they didn't record drilling parameters therefore it doesn't give any information at all ! Was it necessary to...
- How much reduction in spoils can be expected?
when you withdraw your tool line, a reverse auger will displace what has been falling during drilling in the annular space. Therefore you will have a very nominal amount of spoil after finishing a pile : roughly the volume of soil in the...
