1) Using 2d analysis software such as plaxis/wallap we obtain the 'strut load per mtr'.
2) Guess the capping beam and strut sizes and geometric arrangement.
3) Analyse the system using software like strand7/spacegass. use the forces obtained to design the reinforcement of the beam. We have to...
Im not sure what country you're based in but in Australia there is a technical specification which covers this exact type of situation. Standards Australia SA TS 101:2015 - Design of post-installed and cast in fastenings for use in concrete.
I'm not suggesting there aren't potential design...
N16 at 300 cntrs good for about 110kn/m ULT in pure shear which ignores the fact its notched to some degree into the shotcrete wall. Column row typically about 8m off the shoring wall. Say 20kpa ultimate UDL with 4m load wide = 80kn/m shear load at the pile interface.
On first glance this...
The capping beam is poured with the shear plate in place so i'm fairly confident there is a fair amount of load being taken up via skin friction between the plate and the RC beam.
The strut is designed for this sag. Without considering these second order effects the 710 CHS is good for about...
When I workout the shear load being transferred into the capping beam I need to be able to justify that not all the load goes through the shear studs - that some occurs with friction between the plate and the concrete. Adding some hard faced beads gives me a little more confidence that this will...
Who wants to play a game.
In two days I am installing two 750mm dia CFA piles. One pile will go 21m and the other will go 26m.
A week after these piles are installed we will be using a 16T lead drop hammer and carry out PDA/Capwap analysis. The piles are not contract piles and we will...
PEinc - The deep wells are designed in such a way that the 'draw down curve' is below the excavation and removes hydrostatic pressure from the wall. There were also spears installed from the lower level as the wells didn't quite do the job.
killswitchengage - The slab dowels into the piles...
PEinc - The pile installation was underway when the client advised that a hydraulic tank in the corner was required. This made the excavation approx 1.5m deeper which made the pile reo and length insufficient. This extra brace was installed to solve this problem.
killswitchengage - they are...
Thanks for the input, its more like Soil: g=20kN/m3; f'=37º, delta=19º
- Surcharge: 15kPa
- 4m of hydrostatic.
We build the shoring systems to, so in reality im going to go a mid value range and put some strain gauges on the struts and have a contingency to add a second row of bracing.
The...
I use wallap and plaxis essentially all day at work. I often compare the two for shoring wall designs. Typically I find the two are in general agreement ie similar bending, shear, deflections. In my experience plaxis shows higher strut loads - maybe 10-15% more.
I have just run a model and the...
SlideRuleEra - the above was just a random depiction - however by raising the brace level the brace load would be less but I believe creates more issue as the distance between the centroid of the shear resistance to the strut load increases and induces overturning to the whole system.
