In the severe conditions of the Arctic shelf, ice-protective pile-gravity platforms have found application, which significantly improve the conditions of interaction with the soil base. When designing offshore ice-resistant gravity-type platforms, regardless of the design and material of the foundation block, it is usually envisaged to install elements buried below the base of the slab of one design or another. This allows deepening the calculated shear surface to the value required by the stability conditions to stronger soil layers, increasing the foundation stability due to additional support of the foundation soil, and protecting the foundation part along the perimeter from unwanted erosion of the foundation soil. Based on the theoretical studies presented in the article, a method for increasing the stability of an ice-resistant gravity platform in the form of a pile anchorage device in cement soils is presented. The physical and mechanical characteristics of cement soils are considered: brittleness measure, brittleness coefficient, compressive strength, splitting strength, strength variation coefficient. Based on the conducted research, practical recommendations are given for improving the composition of cement soils of pile foundations. A sequence of actions is proposed for installing an ice-resistant gravity platform at the point of its operation, with the parallel process of drilling production wells.

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Application of Cement Soils in the Construction of Pile Anchoring of Ice-Resistant Gravity Platforms

  • N. G. Seregin,
  • N. V. Shunko

摘要

In the severe conditions of the Arctic shelf, ice-protective pile-gravity platforms have found application, which significantly improve the conditions of interaction with the soil base. When designing offshore ice-resistant gravity-type platforms, regardless of the design and material of the foundation block, it is usually envisaged to install elements buried below the base of the slab of one design or another. This allows deepening the calculated shear surface to the value required by the stability conditions to stronger soil layers, increasing the foundation stability due to additional support of the foundation soil, and protecting the foundation part along the perimeter from unwanted erosion of the foundation soil. Based on the theoretical studies presented in the article, a method for increasing the stability of an ice-resistant gravity platform in the form of a pile anchorage device in cement soils is presented. The physical and mechanical characteristics of cement soils are considered: brittleness measure, brittleness coefficient, compressive strength, splitting strength, strength variation coefficient. Based on the conducted research, practical recommendations are given for improving the composition of cement soils of pile foundations. A sequence of actions is proposed for installing an ice-resistant gravity platform at the point of its operation, with the parallel process of drilling production wells.