CN216184636U - Horizontal web member formula prestressed concrete contact net cantilever pillar - Google Patents

Abstract

The utility model discloses a transverse web member type prestressed concrete contact net cantilever support, which comprises an I-shaped concrete support body and prestressed tendons arranged in the support body; the middle of the I-shaped concrete pillar body is provided with a web plate, and the two ends of the I-shaped concrete pillar body are provided with flanges; pedal holes are arranged at the middle upper part of the web plate of the strut body at intervals; a plurality of vertical prestressed support ribs are arranged in the flange; the width of pillar body parallel line direction is 354mm, and edge of a wing thickness is 70mm, and its prestressing steel is the flange part of arranging in exploring the web in double row, and the row's prestressing steel number of keeping away from the web is not less than the row's prestressing steel number of being close to the web. The utility model has the advantages that under the conditions of small volume and dead weight increase and low-cost manufacture, the bending moment in the direction of the parallel line is more than 32KN.m, and the requirements of railways in coastal and inland gale areas can be well met.

Description

Horizontal web member formula prestressed concrete contact net cantilever pillar

Technical Field

The utility model relates to electrified railway contact net facilities, in particular to a transverse web member type prestressed concrete contact net cantilever support.

Background

At present, the selection of a cross web member type contact net cantilever support for the electrified railway adopts a railway industry standard TB/T2286-2020 prestressed concrete support of an electrified railway contact net, as shown in figures 1, 2, 3 and 4, 3 is a prestressed reinforcement, 2 is a web plate, 1 is a flange and 4 is a circular pedal hole; pillar length is 12200mm, the length of the perpendicular line direction of column bottom is 705mm, the width B of parallel lines direction is 291mm, edge of a wing thickness is 50mm, its prestressing steel is the single row and arranges, not only arrange the both ends on the edge of a wing, and in having deepened the edge of a wing that the web extends, can't reach stronger support dynamics to the weak position in edge of a wing, it is little to lead to the parallel railway line direction support dynamics of pillar, easily produce the bending, wherein the nominal capacity of cantilever pillar is 60 KN.m, 78KN.m, model pillars such as 93KN.m, its parallel lines direction bending moment is maximum 21 KN.m. The strut has the problems of insufficient bending moment in the direction of a parallel line and weak wind resistance under the conditions of coastal and inland gale areas in China. At present, no contact net support with nominal capacity of 80 KN.m and 100 KN.m models exists at home and abroad, and the research on the novel contact net support with the nominal capacity of 80 KN.m and 100 KN.m ensures that the bending moment in the direction of a parallel line is more than 32KN.m, so that the requirement of railways in coastal and inland gale areas is very necessary.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems in the prior art, and provides a transverse web member type prestressed concrete contact net cantilever support which has a bending moment greater than 32KN.m in the direction parallel to a railway line under the conditions of small volume and dead weight increase and low cost manufacture, and can well meet the railway requirements of coastal and inland gale areas.

In order to achieve the purpose, the technical solution of the utility model is as follows: a transverse web member type prestressed concrete contact net cantilever support column comprises an I-shaped concrete support column body and prestressed tendons arranged in the support column body; the middle of the I-shaped concrete pillar body is provided with a web plate, and the two ends of the I-shaped concrete pillar body are provided with flanges; pedal holes are arranged at the middle upper part of the web plate of the strut body at intervals; a plurality of vertical prestressed support ribs are arranged in the flange; the support is characterized in that the width of the support body parallel to the railway line direction is 354mm, the thickness of a flange is 70mm, the prestressed reinforcements are arranged on the flange part extending out of the web in a double-row mode, and the number of the rows of the prestressed reinforcements far away from the web is not less than that of the rows of the prestressed reinforcements close to the web.

Further preferably, the number of the row of prestressed steel bars far away from the web plate is 2, and the number of the row of prestressed steel bars close to the web plate is 1-2.

Because the utility model increases the width of the strut in the direction parallel to the railway line, the thickness of the web plate is half of the width according to the design structure characteristics of the strut, the thickness of the web plate is correspondingly increased, the thickness of the flange of the strut is increased to 70mm from 50mm of the existing cantilever strut, the prestressed steel bars arranged at the flange are changed from single row to double row, and are all arranged at the flange part of the extending web plate, the integral supporting strength of the flange is increased, the stress area of the strut along the line direction is increased, the stress performance of the steel bars is enhanced, the bending moment bearing capacity of the strut along the railway line direction is greatly improved, the mechanical property of the strut along the railway line direction is improved, the design requirement that the bending moment is more than 32KN.m is met, the strut can be applied to the railway line with more complex environment, such as the requirements of coastal and inland gale railway areas, and the requirements for manufacturing novel struts with the nominal capacities of 80 KN.m and 100 KN.m can be met, the standard capacity of the strut can be more satisfied with the requirements of struts with the types such as 60 KN.m, 78KN.m and 93 KN.m. The steel bars are not increased, the volume is not increased too much, the increase of the dead weight is small, and the manufacturing cost is low under the performance of increasing the bending moment in a large range.

Drawings

FIG. 1 is a front view of a prior art strut;

FIG. 2 is a cross-sectional view AA of FIG. 1;

FIG. 3 is a cross-sectional view of BB of FIG. 1;

FIG. 4 is a cross-sectional view CC of FIG. 1;

FIG. 5 is a front view of the present invention;

FIG. 6 is a cross-sectional view DD of FIG. 5;

FIG. 7 is a sectional view of EE of FIG. 5;

fig. 8 is a cross-sectional view of FF of fig. 5.

Detailed Description

The utility model is further described with reference to the following figures and specific embodiments.

As shown in fig. 5, 6, 7 and 8, the present embodiment includes an i-shaped concrete pillar body 9 and a tendon provided inside the pillar body 9. The middle of the I-shaped concrete pillar body 9 is provided with a web 6, and the two ends are provided with flanges 5. The middle upper part of the web plate 6 of the strut body 9 is provided with pedal holes at intervals. A plurality of vertical prestressed support ribs are arranged in the flange 5. The width D of the pillar body 9 in the direction parallel to the line is 354mm, the thickness of the flange 5 is 70mm, the prestressed reinforcements of the pillar body are arranged on the flange part extending out of the web 6 in double rows, and the number of the rows of the prestressed reinforcements 8 far away from the web 6 is not less than the number of the rows of the prestressed reinforcements 7 close to the web 6. Preferably, the number of the row of prestressed steel bars 8 far away from the web 6 is 2, and the number of the row of prestressed steel bars 8 close to the web 6 is 1-2; in this embodiment, the number of the row of prestressed reinforcements 8 with the flange 5 far away from the web 6 is 2, the number of the row of prestressed reinforcements 7 close to the web 6 is 1, the number of the row of prestressed reinforcements 8 with the flange 5 far away from the web 6 is 2, and the number of the row of prestressed reinforcements 7 close to the web 6 is 2; not only has low cost, but also can meet the performance requirement that the bending moment is more than 32 KN.m.

The above embodiments are preferred and illustrative only, and equivalent technical modifications may be made by those skilled in the art based on the description of the patent, which are within the scope of the patent.

Claims (2)

1. A transverse web member type prestressed concrete contact net cantilever support column comprises an I-shaped concrete support column body and prestressed tendons arranged in the support column body; the middle of the I-shaped concrete pillar body is provided with a web plate, and the two ends of the I-shaped concrete pillar body are provided with flanges; pedal holes are arranged at the middle upper part of the web plate of the strut body at intervals; a plurality of vertical prestressed support ribs are arranged in the flange; the support is characterized in that the width of the support body in the direction parallel to the line is 354mm, the thickness of the flange is 70mm, the prestressed reinforcements are arranged on the flange part extending out of the web in a double row mode, and the number of the rows of the prestressed reinforcements far away from the web is not smaller than that of the rows of the prestressed reinforcements close to the web.

2. The strut as claimed in claim 1, wherein the number of the row of prestressed reinforcements far from the web is 2, and the number of the row of prestressed reinforcements close to the web is 1 to 2.

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