Methods for the construction of lowered structures and pile foundations

Vladimir Kocherzhenko,Lyudmila Suleymanova,V Kankhva

doi:10.1051/e3sconf/202125809036

Vladimir Kocherzhenko, Lyudmila Suleymanova + Show 1 more

Open Access

https://doi.org/10.1051/e3sconf/202125809036

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Abstract

The paper discusses the methods of erecting sunk wells and pile foundations, which consist in regulating the frictional forces of soils: lowering along the lateral surface when sinking wells and increasing when erecting pile foundations. The developed method of sinking wells provides for the application of two types of effective antifriction coatings along the lateral surface: along the cutting edge of the structure and above the cutting ledge. At the same time, the coefficients of reducing the friction forces by these coatings for various types of soils have been established, and a method for calculating sunk wells for lowering is proposed, taking into account the use of the developed submerging method. To increase the friction forces on the lateral surface of the driven piles and to increase their bearing capacity, modular piles with a developed lateral surface of the T-section have been developed and introduced. The areas of rational use of these piles are established depending on the types of soils (clay and sandy) and the depth of their penetration.

Highlights

In underground construction and in pile foundation construction, soil friction often has both a positive and a negative effect on the bearing capacity of structures
When erecting deep underground structures using a sunk well method, friction forces along the lateral surface play a negative role, since they prevent the structure from sinking to the design level
As a result of the development of methods for regulating the forces of external friction of soils during the sinking of lowered structures and piles, the authors have developed and introduced into construction practice wear-resistant antifriction coatings: on the cutting edge- based on ethynol varnish, and above the ledge - self-lubricating coatings based on bottoms of synthetic fatty acids

Summary

Introduction

In underground construction and in pile foundation construction, soil friction often has both a positive and a negative effect on the bearing capacity of structures. The authors studied and introduced a method for reducing the frictional force of soils along the lateral surface of wells using antifriction coatings.

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Conclusion