The influence of repeated loading on work of the steel fiber concrete drainage trays and pipes on the roads

Abstract

Abstract. The drainage system is one of the components of the road design. The condition of the subgrade and pavement depends on its effectiveness. The main structural elements of the drainage system on the roads are gutters and pipes. They are made of concrete or reinforced concrete. Under the influence of climatic factors and fluctuations of the vibration caused by the vehicles movement on the surface, it occurs destruction: formation of cracks, potholes, husking of concrete, destruction of protective layer of concrete, etc. It should be noted that these structures perceive the dynamic and thermal effects. The low fracture materials toughness poses the issue of searching ways of its increase. One solution of this problem is the use of dispersion-reinforced concrete gutters and pipes. The article presents the results of research strength, crack resistance and deformability of gutters and pipes using steel fiber reinforced concrete under the action of repeated loads Non-pressure pipes and street gutters on the roads used in the construction of drainage systems for drainage of rain, snowmelt and groundwater from road sections with a high degree of load, highways, walkways, airports and terminals. It should be noted that future traffic on the roads I-A and I-B categories, according to calculations takes more than 10000 vehicles per day. The throughput of an individual vehicles of Ukraine even exceed these standards, in particular, the highway Kyiv-Boryspil traffic is about 40 thousand vehicles per day. A huge stream of traffic through the cross section of a road of this class creates significant dynamic vibration oscillations, which act on road transport facilities. While the low fracture toughness of the materials of gutters and pipes puts the issue of finding ways to improve it.One solution in this direction is using of concrete in these construction of gutters and pipes with the addition of reinforcing elements looks like a short steel cuts -steel fiber reinforced concrete. The combination of rigid (and because of this with considerable reserves of strength) fibers with the matrix (concrete) allows to localize the danger associated with brittle destruction of the matrix and to realize the basic properties of fibers: greater potential tensile strength and high modulus of elasticity.