This work is dedicated to creation and research of anchor device of sheet-pile quay walls in order to use fully the reserves of bearing capacity of the structure and in order to minimize materials` and resources` consumption. The aforementioned can be reached
during the design and construction of new sheet-pile quay walls, as well as during operation and repair/reconstruction of the existing ones. An innovative (obtained authorship certificate − patent of Ukraine) anchor device of a «comb»-type made of several anchor plates connected by a common core is investigated. This device provides the solution for both: for increment of bearing capacity of sheet-pile quay walls due to the particular design features (with the same material consumption, which corresponds to the material consumption of a traditional anchor plate design) and for the reduction of material consumption (with the same bearing capacity, as in traditional anchor plate design). The results of an experimental research of an innovative «comb»-type anchor device confirmed the effectiveness of the new device in comparison with the traditional anchor bearers (of a type of a single vertical plate). It has been found that the depth of immersion of the anchor bearers significantly affects the scale of displacements and the distribution of
soil pressure. The bearing capacity of the «comb» increased with an increment of the angle of inclination of the plates, which characterizes the increment of soil resistance (passive pressure) and of the degree of soil consolidation between the plates of the «comb», thereby this is reducing the deformability of the anchor device as a whole. With the displacement of the anchor device on the soil surface appeared bulges, which is consistent with the known data. Analysis of the results of comparative calculations completed in accordance with the
known methods and theories, allows us to make the following conclusions: methods based on the Coulomb theory, as well as the ones refining them in terms of calculation of the backfill soil passive pressure (pressure of resistance) (in particular it is described in works of A. Budin, Z. Cagareli), lead to a decrease of the bearing capacity of anchor device compared to the experimentally obtained data. Underestimation is observed in the range of 39-69 % depending on the method used and the location of the plates «comb»; methods based on the theory of critical soil state lead to a significant overestimation of the bearing capacity of the investigated anchor device compared to the experimentally obtained data. Thus, when using the formulas given in regulatory documents, overestimation of values is observed from 59 % to 342 % (depending on the method used and the localization of «comb» plates). At the same time, further refinements of this theory, proposed by P. Yakovlev, allow to reduce these overstatements to the interval of 60-123 %; the finite element method, based on the application of the Coulomb-Mohr soilelastic model provides the results, which are closer to the experimental values (deviation from the experimental data, towards the lowering of the bearing capacity of the anchor
device in the interval of 11-36 %). Based on the numerical modeling, the basic factors that determine the bearing capacity of both the anchor device and the whole structure (the depth of the anchor bearers, the angle of anchor plates` inclination, the number of plates, the height of the various plates in the «comb» and the order of their location in the device) are analyzed. For the specific engineering, geological and operational conditions of the existing terminal (berth No 8 of the port «Pivdennyi»), the basic parameters and bearing capacity of the anchor device of a «comb»-type were calculated.
