PREDICTION OF THE STRESS-STRAIN STATE OF A ROAD STRUCTURE WITH SHALLOW TRANSVERSE TUBULAR DRAINAGE

Olena Slavinska,Andrii Bubela,Oleksandr Davydenko

doi:10.21303/2313-8416.2020.001396

Abstract

The stress-strain state of a road structure with shallow tubular drainage, which is arranged on waterlogged sections of public highways, has been investigated. Three-dimensional models of the road structure with pipes made of various materials were built using the finite element method. Experimental studies on models were carried out for cases of normative and over-norm load on the basis of the SCAD Office software and calculation complex. The distribution of normal stresses, deformation values in the road structure and directly in the body of the tubular drain is obtained. The working conditions were determined and the expediency of using PVC pipes and concrete pipes on the road of III category was substantiated. Subject of research: stress-strain state of a road structure with shallow transverse tubular drainage. Investigated problem: determination of deformations in a road structure with tubular drains based on the distribution of normal stresses. Main scientific results: distribution of isopoles and isolines of normal stresses, deformation values in road structures with shallow transverse tubular drainage. The expediency of using the type of drainage pipes on waterlogged sections of roads under conditions of excess load has been determined. The area of practical use of the research result: design institutions and enterprises specializing in the road transport industry. An innovative technology product: stress and strain distribution in atypical road structures with tubular holes. Scope of application of the innovative technological product: for the design of atypical road structures with tubular holes on waterlogged road sections.

Highlights

The stress-strain state of a road structure with shallow tubular drainage, which is arranged on waterlogged sections of public highways, has been investigated
It is possible to come to the conclusion that limiting displacements along the edges of the model will significantly reduce deformations along the vertical extreme edges of the soil mass
The deformation in the body of the pipes varies in the range of 0.11–0.13 mm, in contrast to the obtained research results, which exceed the previous ones by 2 orders of magnitude

Summary

Introduction

The object of research Stress-strain state of a road structure with shallow transverse tubular drainage. Problem description Shallow drainages (SD), as a rule, are arranged on waterlogged sections of public highways. In the conditions of Ukraine, drainage slots in a road structure (RS) with an estimated water consumption of more than 0.72 m3/day are arranged only with tubular drains, according to DSTU-N B V.2.3-41:2016 “Guidelines for the design of shallow drainage structures on automobile roads”. Tubular drains must operate in a free-flow mode in the RS working area, which perceives a double load from vehicles and its own weight. In spring or autumn, waterlogged sections of highways (excavations, at zero marks) operate in an overloaded mode with a reduced

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