SU1638234A1 - Construction member - Google Patents

Abstract

The invention relates to railway transport, in particular to the construction of the rail base. The purpose of the invention is to ensure the replacement of the liner and preserve the stability of the structure. The building element contains under-rail liners 1, dispersion-reinforced polymer concrete 2 and pre-stressed reinforcement. The upper and lower bases of each liner are made in the plan in the form of a rhombus, with one pair of side edges of the liner located at an angle to the longitudinal axis of the element, and the other in parallel. 4 il.

Description

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The invention relates to railway transport, in particular to the construction of the rail base,

The purpose of the invention is to ensure the replacement of the liner and preserve the stability of the structure.

Fig. 1 shows the structure of the rail insert 9 a cutJ in Fig. 2 - the same in plan, and the forces acting on the liner under the influence of train load; in Fig. 3 the design of railway sleepers with inserts in Fig. 2. 4 - structures of railroad switch boards with liners.

The building element contains under-rail liners 1, dispersion-reinforced polymer concrete 2 and pre-stressed reinforcement 3. It is possible to use the structure of the liner in other structures of the under-oval base of the track (plates, blocks, etc.) „

The construction element works as follows.

With the passage of rolling stock liner perceives complex dynamic force action (Fig 1). The vertical dynamic force RV of the wheel pressure on the rail is transmitted through the rail through the metal lining to the rail insert and then with the liner is redistributed directly to the track structure (bar) When the rolling stock moves along pti, additional forces arise: the lateral force in the curve (Pg;) is parallel to the longitudinal axis of the beam; the force of hijacking (Rc), especially in areas with a reverse bias, directed perpendicularly to the longitudinal axis of the beam along the axis of the path. The resultant of these forces (Pn) (Fig. 1) acts on the rail insert is perpendicular to the inclined face, which ensures the liner's resistance to moving along the axis of the track, even if it is completely detached from the beam.

The configuration of the rail insert allows, if necessary, replacing the defective liner with a new one without dismantling the bars and rails at any time of the year. To do this, it is enough to sew a turnip (remove the crutches), remove the metal lining and knock out the liner inside the rail track (axis I-I in Fig. 2). Then, in its place on the same side, a new liner is inserted on the polymer mastic, and after the mastic has cured, the rail seaming is carried out. It is also positive. that immediately after replacing the liner can perceive vertical loads (before crutches are driven), and the attachment of the rail can be carried out after complete polymerization of the adhesive (mastic). Thus, the safety of the movement of trains along the track structure with sub-ram liners is ensured at all stages of operation and maintenance.

The armopolimeter concrete structure of a railway track with a liner in the near-rail zone approaches in its elastic properties to wooden sleepers, which leads to a significant decrease in the level of dynamic interaction between the track and rolling stock compared to reinforced concrete track structures. The accumulation of residual deformations of the base of the track is reduced and, as a result, the labor costs for the alignment of the track are reduced. The cost of straightening the track with wooden sleepers is 30% less than the cost of reinforced concrete sleepers. This significantly increases the service life of the structure, especially in aggressive environments, where reinforced concrete structures serve 5 years or less. Therefore, the design of the track is recommended for use in areas with aggressive media. The service life of armored polymeric concrete structures at such sites, according to preliminary data, is 40–50 years or more, while it is possible to replace if necessary only individual liners, since the service life, for example, of a wood liner in normal temperature and humidity conditions 15-17 years, and in an aggressive environment - 2-3 times less than the configuration of the rail liner provides reliable fastening of the liner in the design of the track and allows you to replace the defective liner with a new one without dismantling the rails and the rail link uktsii at any time of the year. The cost of the current maintenance of the structure is significantly lower than that of the known structures of the sleepers with the rail ram.

Claims (1)

The invention The building element, mainly for railways, having a body of variable length cross section of armopolimer concrete and discretely spaced liners in the form of truncated pyramids, located at load sites, is established because, in order to ensure the replacement of the liner and preserve the stability of the structure, the upper and lower bases of each insert are made in the plan in the form of a rhombus, with one pair of side edges of the insert located at an angle to the longitudinal axis of the element, and the other on a layer of polymer glue, about tl and-c) a pair of faces is parallel. P FIG. 3 2 but 4