Researching solutions to overcome different forms of invisible wear and tear of of construction of seaport berths in the form of a one-anchor pile wall

Abstract

The article presents the results of research on solutions to overcome invisible wear and tear of one-anchor pile wall seaport structures.The authors analyze and select structural solutions and propose a method of calculating the wharf with consideration of different invisible wear options and make a TC-AHMVH calculation program. The research have led to the basic results for different invisible wear options of the work:

- If it is only required to increase the depth in front of the wharf by an amount ΔHtY= 1.25 m, then the thickness of the rock to replace the soft soil in front of the wall is at least hdmin= 3.3 m (0.33Ht, where Htis the height of the work);

- If it is only required to increase the exploitation load on the wharf by an amount of ΔqY= 15 kPa, the minimum thickness of rock to replace soft soil is hdmin= 2.59 m;

-When it is required to simultaneously increase the depth in front of the berth and the operating load on the berth, already set up the relationship diagrams between the increased depth Ht and the working load can increase the limit Δqgh for the different thicknesses of the layer of the rock to replace soft soil. On that basis, with an value of the required depth ΔHtY, it is possible to determine the mining load that can increase the limit Δqgh and vice versa. For example, with hd = 3.5 m, if the required depth is increased by ΔHtY= 1.1 m, the mining load can only be increased up to Δqmax= 7.4 kPa. In the case of hd= 3.0 m, if the required mining load is increased by ΔqY = 6.0 kPa, the depth in front of the wharf can only increase up to ΔHtmax= 0.80 m.

The research results can be applied in practice to overcome the invisible wear and tear of the work, as well as to renovate and upgrade harbor structures in the form of the one-anchorpiling wall.