FLEXIBLE RETAINING WALL

Task:

An engineering work was carried out to stabilise the slope to protect the hotel, however, as this engineering work could not be conducted beyond the site, two sidewall retaining walls containing sheet pile walls were designed and constructed on both sides of the site. These sheet pile walls provided a suitable space for safe engineering work such as excavation and soil nailing to stabilise the slope. Figure $1$ illustrates the site and the location of the sheet pile walls along with the height of the excavation. Figure $3,$ illustrates the cross$-$section of the sheet pile wall as well as the soil, wall and anchor properties. For the given details, critically evaluate the penetration depth $($d$)$ required for the sheet pile wall. Discuss the effect and position of anchor$($s$)$ if it is required. A FoS of $1\mathrm{.}25$ is considered for this design. Use Geosolve Wallap and hand calculation to support your evaluation.

Wall properties

Young's modulus of wall, $\backslash (\backslash$mathrm$\{$E$\}=3\mathrm{.}0\backslash$mathrm$\{$E$\}+07\backslash$mathrm$\{$kN$\}/\backslash$mathrm$\{$m$\}^\{2\}\backslash )$

Moment of inertia of wall, $\backslash (\backslash$mathrm$\{$I$\}=8\mathrm{.}48\backslash$mathrm$\{$E$\}-03\backslash$mathrm$\{$~m$\}^\{4\}/\backslash$mathrm$\{$m$\}\backslash )$

Anchor properties

Young's modulus, E $=2$E$+08$ kN$/$m$^2$

Cross sectional area, $\backslash (\backslash$mathrm$\{$A$\}=0\mathrm{.}0625\backslash$mathrm$\{$~m$\}^\{2\}\backslash )$

Spacing of the struts $\backslash (=1\backslash$mathrm$\{$~m$\}\backslash )$

Pre$-$stress$/$strut $\backslash (=100\backslash$mathrm$\{$kN$\}\backslash )$

Section $\backslash (\backslash$mathrm$\{$x$\}-\backslash$mathrm$\{$x$\}\backslash )$

Figure $3$: Sheet pile walls details and soil properties