ProSheet 2.2 06-06 Design software for sheet pile retaining walls 1 Introduction ProSheet 2.2 Design program developp
Views 274 Downloads 7 File size 2MB
ProSheet 2.2 06-06 Design software for sheet pile retaining walls
1
Introduction ProSheet 2.2 Design program developped in collaboration with the Sheet Piling department of ARCELOR COMMERCIAL RPS: • allows quick dimensionning of steel sheet pile retaining walls • designed for simple structures and pre-dimensionning (refer to chapter “ possibilities “)
• geotechnical knowledge / backround required (definition of soil characteristics / calculation of retaining walls)
The results produced by this method have to be checked carefully by the user in order to make sure that modelization of the soil-structure interaction is accurate enough. 2
Introduction (...) Calculation method: • Fixed earth support according theory of Dr. Blum • Limit earth pressure - earth resistance Ka / Kp (Caquot / Kerisel)
Three static systems are possible: • Cantilever • Free earth support with one layer of anchor or struts • Fixed earth support with one layer of anchor or struts (Blum)
3
General informations • Installation and configuration – Two languages are possible (F or GB) ° separate directories if both versions are installed – Configuration: decimal symbol = " . " (see also "Read-me" / evtl. use "French-Switzerland") – Metric or imperial units • Convention (see also "Help"-File) – Levels º positive downwards, refered to level ± 0.00 º negative upwards – Wall friction angle (to be introduced manually) º Earth pressure : δa = positive º Earth resistance : δp = negative 4
Possibilities • Continuous sheet pile wall design with: – 1 retaining level (anchorage or struting) – rear anchor wall – simulation of construction stages NOT possible Be careful: construction stage could guide the design ! – catalogues of ARCELOR sections ° AU, PU, AZ, Coldformed OSP ° not included: HZ-AZ combined wall system • Various options – uniforme surcharge load of type Caquot – lineare surcharge load of type Boussinesq – concentrated forces – additional pressures on the wall
5
Dimensionning of main wall Three static systems are possible
Cantilever wall Hrecom.: 5 à 6 m Mbend Ê / fmax Ê length Ê
Anchored / strutted wall free earth support Mbend. Ê / R Ê minimum pile length 6
Anchored / strutted wall fixed earth support Mbend. Ì / R Ì longer pile than free meth.
Dimensionning of anchor wall Two static systems are possible - free earth support
- fixed earth support Ra,h
Assuming identical soil conditions and tieback load: deeper anchor level Ö sheet pile length Ì
higher anchorage level Ö sheet pile length Ê
Chosen system depends for ex. on construction stages, installation possibilities, a.s.o. 7
Restrictions • Not included options: – partial coefficients (SLS / ULS, Eurocodes) – seismic effects ⇒ design values to be introduced manually • and: – distance between main and anchor wall (Kranz, Jelinek, …) – slip cercle analysis (Bishop, …) – hydraulic failure – discharge through interlocks ⇒ Use different software
8
Example : Anchored quay wall Geometry:
Main wall
Traffic load S
0.00 Bollard H
0.50 1.50
0.50
retaining height:5.00 m
•
final level:
0.50 m
•
anchor level:
1.50 m
•
water:
4.00 / 2.50 m
Soil conditions: 2.50 5° Sand (fill)
4.00
•
sand:
ϕ’ = 30.0°
γ / γ ’ = 18 / 10 kN/m3
Ra
•
5.50
5°
•
clay:
ϕ = 27.5° c’ = 5 kN/m2
γ / γ ’ = 19 / 9 kN/m3
Clay
Loadings: surcharge: bollard:
?
9
S = 20 kN/m2 H = 50 kN/m
Units, configuration and projet info Start Prosheet Set options: •Units •Projet info •Configuration
10
« Help » ‘Help’- File Introduction Example Conventions Helpful hints Help (contacts)
11
Create a new file
Clic on the arrow of the « tool box »
12
Design data
Soil level Water level Uniform surcharge load Earth support Continue with ‘ Soil Layers ’ Don’t clic directly on ‘OK’
Fill in at least : ‘GeoData’ / ‘Soil Layers’ / ‘Pile Section’ 13
Soil Layers
(1/3)
Soil characteristics: γ / ϕ / δ / c’
Add or delete soil layers Note : Layer Tip = lower level of soil layer
14
Soil Layers (2/3)
Important: Put lowest soil level deeper than assumed embedment depth δp = negative Check if automatic calculation for Kph is activated
15
Soil Layers (3/3) Copy from ‘Layers in front’ to ‘Layers behind’ Change signe of δa Check if automatic calculation for Kah is activated
16
Concentrated loads: vertical, horizontal
Loads are positive downwards resp. to the left
•Clic on ‘+ / -’ to add or delete a ligne
17
Sheet pile section / Steel grade First choice: AU 14 S 270 GP
Safety factor is only applied on yield point (steel stresses) !
18
Results: All values / Extremal values / Pile check …
Clic on ‘Table’ (explorer) to get all the results Deflection
Pile toe level
Safety on steel stress
Pile length Overlength Δx Anchor load Ra,h 19
Extremal values / All values
Level ‘z’
Value
20
Diagrams
21
Earth pressure coefficients
To check values of Kah and Kpk ⇒ return to the file ‘Soil layers’
22
Printing the results (tables and graphs)
Printing
Right button
23
Error messages
Soil resistance