Retaining wall/vehicle loading

[Redtelis]

Hi,

I currently design a retaining wall for a parklift system within a parking of a residential block. The parking is located at the ground floor, therefore the pit of the parklift will be approx. 2m below ground floor level, please see attached photo and retaining wall highlighted.

I am looking the applied vehicle loading to the retaining wall with different scenarios.

Eurocodes suggests that a UDL as a surcharge load and lateral line load are applied due to the vehicle traffic. However the load models are based on highways, therefore they suggest very high vehicle loads such as axle loads of 300kN.

What kind of vehicle loads would you consider for this type of parking? It's residential only, no lorries or trucks.

 

[r13]

IMO, you should get the weight of passenger vehicle that the lift can accommodate, the load directly on the wall will be the concentrate load from two tires and impact.

 

[dik]

How are you going to get a car in the lower space? Other than driving into the lift spot the wall surcharge would be for a typical vehicle. As r13 noted, the vehicle weight should equal the design load of the lift. There are several examples of this type of surcharge design... Merry Christmas to all...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[BridgeSmith]

The surcharge pressure will be based on the depth required based on the height of wall (shorter walls require higher surcharge pressure, at least per AASHTO), and then scaled for the axle weight of the parking garage design vehicle from the axle weight of the highway design vehicle.

In the US, for a 5' high retaining wall, for instance, the surcharge for an HL93 truck would be 4' of soil. 4'*120pcf*k, where k is either ko (if the wall should not move) or ka (if the wall can move). The HL93 truck axle weight is 32,000 lbs.

Rod Smith, P.E., The artist formerly known as HotRod10

 

[HTURKAK]

Pls look Eurocode 1: Actions on structures —Part 1-1: General actions — Densities,
self-weight, imposed loads for buildings..

6.3.3 Garages and vehicle traffic areas (excluding bridges) applicable..

You may consider qk =7.0 kN/m2 UDL and neglect the Qk.