This invention relates to a method for insulating sub-soil comprising mechanically destructuring the sub-soil, injecting an insulating material into the destructured sub-soil, and mixing the sub-soil and the insulating material. The thermal conductivity of the insulating material is strictly lower than the thermal conductivity of the sub-soil.

This invention relates to a method for insulating sub-soil comprising mechanically destructuring the sub-soil, injecting an insulating material into the destructured sub-soil, and mixing the sub-soil and the insulating material. The thermal conductivity of the insulating material is strictly lower than the thermal conductivity of the sub-soil.

Pile foundations for power transmission towers or the like for installation in different types of soil prone to frost heaving include a casing pipe and a dipped pile, comprising a shaft and a toe bulb, secured at the bottom of the shaft. The pile comprises rigid elements that are mounted on the shaft in the direction of horizontal forces acting on the pile against the anticipated horizontal loads. The rigid elements transfer horizontal forces from the pile to the casing pipe.

Pile foundations for power transmission towers or the like for installation in different types of soil prone to frost heaving include a casing pipe and a dipped pile, comprising a shaft and a toe bulb, secured at the bottom of the shaft. The pile comprises rigid elements that are mounted on the shaft in the direction of horizontal forces acting on the pile against the anticipated horizontal loads. The rigid elements transfer horizontal forces from the pile to the casing pipe.

The disclosure relates to a saddle support for use in above-ground pipeline construction in severe geological conditions, such as permafrost. The support provides structural stability and redistribution of a load from a pipeline to a pile foundation. The saddle support includes the spool coupled to four adjustable stands through electric insulating units. The stands can be adjusted to change a height and slope angle of the support and are fastened to a single-level pilework that supported by the pile foundation via flanges. The spool is a pipe having an external case and a heat-insulating layer. Longitudinal ribs are fastened to the spool to fasten the spool to the stands. The load-bearing structure of the spool resists axial and side movements of the pipeline and transfer the load absorbed by the spool to the pilework foundation via the electric insulating units on the adjustable stands.

The disclosure relates to a saddle support for use in above-ground pipeline construction in severe geological conditions, such as permafrost. The support provides structural stability and redistribution of a load from a pipeline to a pile foundation. The saddle support includes the spool coupled to four adjustable stands through electric insulating units. The stands can be adjusted to change a height and slope angle of the support and are fastened to a single-level pilework that supported by the pile foundation via flanges. The spool is a pipe having an external case and a heat-insulating layer. Longitudinal ribs are fastened to the spool to fasten the spool to the stands. The load-bearing structure of the spool resists axial and side movements of the pipeline and transfer the load absorbed by the spool to the pilework foundation via the electric insulating units on the adjustable stands.

A shallow foundation form and method of using are provided. The form is useful for pouring concrete slab foundations and results in a frost protected foundation with improved thermal characteristics. The form may include brackets to hold rebar at various locations. The brackets are designed to avoid the use of fastening devices, such as wire ties. When used to pour a concrete foundation, the form and brackets reduce construction material input costs, reduce the amount of skilled labor required, and reduce the amount of time required to pour a foundation.

A shallow foundation form and method of using are provided. The form is useful for pouring concrete slab foundations and results in a frost protected foundation with improved thermal characteristics. The form may include brackets to hold rebar at various locations. The brackets are designed to avoid the use of fastening devices, such as wire ties. When used to pour a concrete foundation, the form and brackets reduce construction material input costs, reduce the amount of skilled labor required, and reduce the amount of time required to pour a foundation.

A method for installing pile foundations for power transmission towers or the like in different types of soil prone to frost heaving provides piles with bearing capacity against horizontal loads, reduced labor content and installation cost, and increased reliability against the impact of frost heaving forces of the soil on the pile. A casing pipe is driven in and then the pile is inserted into it, while installing rigid elements on the pile shaft by welding. When driving the pile, when a mark indicating a point of installation for a rigid element reaches the top of the casing pipe, a geometric measurement of gaps is made between the casing pipe and the pile. Based on the measurement, rigid elements are sized and welded in pairs on the opposite side in a vertical plane. The operation of placing and welding is then repeated during the pipe inserting.

A method for installing pile foundations for power transmission towers or the like in different types of soil prone to frost heaving provides piles with bearing capacity against horizontal loads, reduced labor content and installation cost, and increased reliability against the impact of frost heaving forces of the soil on the pile. A casing pipe is driven in and then the pile is inserted into it, while installing rigid elements on the pile shaft by welding. When driving the pile, when a mark indicating a point of installation for a rigid element reaches the top of the casing pipe, a geometric measurement of gaps is made between the casing pipe and the pile. Based on the measurement, rigid elements are sized and welded in pairs on the opposite side in a vertical plane. The operation of placing and welding is then repeated during the pipe inserting.