METHOD FOR INSTALLATION OF SUPPORTING STRUCTURAL ELEMENTS OF TECHNICAL MEANS OF OBJECT PROTECTION SYSTEMS IN SEASONALLY FREEZING HEAVING SOILS Russian patent published in 2022 - IPC E02D27/35 

FIELD: construction.

SUBSTANCE: invention relates to construction, and in particular to methods for installing support elements (supports) of the alarm fence and its elements (for example, gates, wickets), as well as supports (racks) designed to place perimeter detection devices on them, in soils subject to frost heaving, which causes intravolumetric deformation in these soils. The method for installation of support elements of structures of technical means of object protection systems in seasonally freezing heaving soils includes a support element located in the soil, the lower part of which is buried below the border of seasonal soil freezing into a pre-prepared hole, followed by backfilling and tamping with filling material of the entire volume of the selected soil, around the support element in a layer of seasonal freezing is placed with non-freezing material enclosed in protective shells capable of absorbing the lateral pressure of heaving soil without destruction, and equipping part of the length of the support element with a stabilizing element. Protective shells are made in the form of plastic and sealed containers, which are placed in pre-prepared holes with a diameter d, made up to the freezing limit in the amount of n pieces and placed at a distance of radius r from the center of the support element, and these holes are made inclined with respect to the axis of the support element in this way so that the central axis of each hole at conditional intersection with the axis of the supporting element forms an obtuse angle λ with it. The deepening of the stabilizing element, the geometric shape of which is a round truncated cone, is carried out in a seasonally freezing layer, while the lower part of the stabilizing element with a large base is placed at the lower boundary of soil freezing. The values ​​of r, n, d and λ are determined based on the characteristics of the deformability of the freezing soil, such as the amount of heaving h_i, the intensity of heaving ƒ, the heaving modulus m, and λ and r are determined by the graph-analytical method according to the intensity diagram ƒ, and n and d are calculated method by solving an optimization problem, in which the objective function f(n,d) takes the maximum value equal to the increment of the soil volume during its heaving around the support element and which depends on the values ​​of hi, and m for the given soil, while restrictions are set for n and d: for n - possible the cost of technological operations for the implementation of n holes, for d - the cost of materials, depending on d.

EFFECT: ensuring long-term preservation of the vertical position of the signal fence supports and its elements, as well as supports (racks) designed to accommodate various types of perimeter detection devices installed on heaving soils with seasonal freezing, increasing the signaling, operational reliability and durability of the signal fence and its elements.

1 cl, 7 dwg