4/10/2023 0 Comments Slope stability surcharge topSo, let’s keep things simple for now and just consider a line load surcharge of, say, 10kN/m acting at the surface close to the excavation. ![]() For now we will just take a look from a temporary works perspective and assess what effect a surcharge will have in terms of additional loads on the shoring that supports the wall. ![]() There are many reasons why we might use 45°, some of which relate to the security of the nearby structure rather than to earth pressure. Why, then, do we stick to this figure for assessing if and when a surcharge will adversely affect the lateral earth pressure on retaining structures? Is this figure conservative enough? Or perhaps it is too conservative. The various equations we use to calculate the effect of surcharges demonstrate that there is still an effect (albeit a small one) far beyond this arbitrary 45° zone. ![]() Why do we so often apply the 45° rule of thumb for the influence that surcharges have on the design of excavation support? This blog returns to the more technical theme of temporary works design and poses the question:
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |