SU804813A1 - Foundation of ferroconcrete power transmission line support - Google Patents

Description

(54) FOUNDATION OF REINFORCED CONCRETE SUPPORT OF ELECTRICAL TRANSMISSION LINES

I

The invention relates to the construction, in particular to the construction of pylons of power transmission lines.

Known pylon transmission lines, in which the base is made using a spatial stand, the lower and upper tier of which is attached to the support pillar clamps 1.

From the bending of the rack in both the Saxis of both Rus, there are forces of both compression and stretching. Compressed along with tightly adjoins through the clamp to the rack, forming an unyielding connection, and stretched detaches the clamp from the rack and forms a compliant mate. As a result, stretched over is underloaded, and compressed is overloaded. This leads to the need to increase the carrying capacity of all the supports, since, depending on the bending direction of the rack, any of the supports can be either compressed or stretched.

A known construction in which, in order to reduce tensile stresses in the rods of the upper row of the stand, increases: its dimensions are in terms of the plan - this enhances the compression of the upper yoke from the action of the self-weight of the support 2.

However, such a stand has a large excess weight due to the aforementioned disadvantages associated with fastening the rack with clamps.

The closest to the present invention is the base of a reinforced concrete support of the Transmission Research Institute, which includes an upward-expanding cup, the bottom diameter of which is smaller than the stand diameter, and through holes in the upper part of the cup walls through which the fasteners 3 are passed.

The disadvantages of such a support are the bending of the glass and the plate by the maximum moment bending the stand, in connection with which they are uneconomical and. t yellow. And in order not to exceed the possible load-carrying capacity of the mechanisms working on the line, such foundations can be made prefabricated for only small, lightweight supports.

Fasteners installed in the upper part of the glass exert a concentrated pressure on the thin walls of the racks, necessitating the inclusion of individual steel mortgage parts (i.e., a departure from the unification of the racks). The purpose of the invention is to increase the economy of the support. This goal is achieved by the fact that the base of the reinforced concrete support of the transmission line, which includes an expanding cup for supporting the rack and the fixture, is equipped with a clip made in the form of a grid element with upper and lower elements themselves, braces and struts, and which is filled with concrete, and the bottom is made rod-shaped and is located at the bottom of the rack. FIG. 1 shows the base of the transmission line pylon; in fig. 2 - plan of the lower rus of the base of the support; in fig. 3base support (scale doubled) cross section. The base of the power transmission line support is made in the form of a lattice element and is fixed on the rack 1 and the foundations 2 (in the rock). The base is fastened to the stand with bottom-leg glasses and the tip, and to the foundations with anchor bolts 3. The side surface of the 4 glasses of the bottom wheel is made of sheet steel, forming a truncated cone, the bottom diameter of which is smaller than the diameter of the rack. The bottom of the glass serves kerchief 5, combine ;; The one rigid knot is the lower one along with the eyes: the ogp-raskos 6 and 7 and the spacers 8. The lateral faces of the base O are made in rod elements 9. The upper side with the 9 bases is joined by spacers K) of sheet steel, and the bottom of the glass diaphragm 11. made of sheet steel, in which the support stand with the aid | and wedge 12 is fixed. To the upper glass it hangs from the table that the weight (5.2 m X 2.5 t / m 3 t) does not allow placing it under dacha support, and precast reinforced concrete foundations). 7t (available for cargo 1. Vod ..:. Tp linear mechanisms) will not have sufficient bearing capacity. The cost of the base of the pylon 342 and. against 612 r, i.e. 1.8 times cheaper. Save on 1 km of power lines will be 1.0 thousand. rub. Since almost all 35-220 kV transmission lines are built on reinforced concrete

footholds, a nationwide proposal can have a significant economic effect.

Claims (1)

Invention Formula The base of the reinforced concrete pylon of the power line, including a stack of arms that has been stretched upwards to support the rack and fasteners, is characterized in that with. Using an economical -: - support, with the lower one with the help of rods 13. On the upper rusa, they are fastened with braces 14, the space between the base plates 15 and the foundation, as well as the sinuses of the glasses are filled with concrete 6. In order to adhere to concrete in the conical surface 4, a steel ring 17 is attached. Fix the base of the supports as follows. A space stand is installed on foundations 2. Through the opening P of the diaphragm 11, the rack 1 is passed and installed on the layer of solution 16 in the bottom glass, where its position is fixed in the conical walls 4 (here the rack is wedged by its own weight). The rack is fixed in the top cup by means of a wedge 12 driven into the gap between the stand 1 and the diaphragm 11 (the centrifugal cylindrical stands currently are made very precisely Tii, the gap may be of a small width). The rack 1 thus fixed in the lattice structure of the base is installed vertically by adjusting the gap between the plates 15 and the foundations 2 (as is the usual steel cantilever support)} by ha ha (k on the bolts 3. zo. Mcii; aM oeroiu ::. / Zopo shallow. L,;; P) of the MS / KDU space with plates 15 and foundations 2 and the sinuses in the glasses, the fixing of the support ends. metrically uprights on the rock at the same nagruzka.ch.