CN204098059U - For the electric power pylon basis of high-strength bolt - Google Patents

Abstract

The utility model relates to transmission line structure design field, disclose a kind of electric power pylon for high-strength bolt basis, comprise base plate, column and stone bolt, described column is connected on base plate, described embedding anchor bolts is in column, described column is the batter post with vertical direction with angle, and described stone bolt is positioned on vertical direction, and described column width B meets formula: in this electric power pylon basis, because stone bolt is vertically arranged, so fire song need not be carried out to it, solve the high-strength foundation bolt such as 42CrMo and forbid the problem that fire is bent, simultaneously, utilize inclined column foundation vertical load can offset the advantage of the moment of flexure that part of horizontal load produces, reduce column reinforcing bar and the base plate size by pressure-controlled, save engineering quantity.

Description

For the electric power pylon basis of high-strength bolt

Technical field

The utility model relates to transmission line structure design field, especially a kind of electric power pylon basis.

Background technology

Power transmission tower is the strong point of overhead wire, because electric power pylon column foot tilts, can certain level load be produced to iron tower foundation and form moment of flexure, for reducing the impact that moment of flexure produces iron tower foundation, at present, power transmission tower basis generally adopts eccentric manner as several in Fig. 1-4:

1, basic stand column adopts batter post; This kind of basis is when adopting stone bolt, and stone bolt needs fire song or adopts batter post oblique top mode.Inclined column foundation adopts batter post oblique top mode, and the rainwater on steel tower will flow down along main material and converge in steel tower center, unfavorable to column foot draining, and basic end face is inclined-plane, and for the execution conditions of transmission line of electricity, construction quality is difficult to ensure.

2, basic stand column adopts right cylinder, stone bolt eccentric manner; This kind of base form easy construction, difficulty of construction is minimum.Owing to adopting stone bolt eccentric manner, cause basic stand column section to increase, increase engineering quantity thus.

3, the overall eccentric manner of basic stand column; This kind of basic stand column is arranged and is constructed more convenient, but construction of bottom plates controls very difficult, and on base plate plane steel bar meter and binding very difficult.Meanwhile, due to the restriction by base plate flakiness ratio 2.5, after column skew, base plate side boom width increases, and need increase base plate thickness.

Wherein, common inclined column foundation is as shown in Figure 1 power transmission tower base case the most frequently used at present, the program utilizes inclined column foundation can offset the moment of flexure of part of horizontal load generation, wherein, the setting direction that stone bolt is arranged in basic stand column is consistent with the incline direction of column, therefore, fire song must be carried out to stone bolt, so that the installation of steel tower, but, along with the development of power construction, transmission line of electricity needs the capacity of conveying increasing, conductor cross-section is increasing, load is caused to increase thus, iron tower foundation active force increases, stone bolt adopts original Q235 steel, 35# steel certainly will cause appearance 8 stone bolt or 12 stone bolt situations.The high-strength foundation bolt such as 42CrMo material are generally adopted in the current steel pipe pole larger at load, 500kV multiple-circuit on same tower, 800kV DC engineering, 1000kV alternating current circuit engineering, this material advantage is that intensity is high, shortcoming is that poor toughness, solderability are poor, so adopt the high strength material stone bolt such as 42CrMo to forbid, fire is bent, inclined column foundation adopts and is restricted.

Utility model content

The high-strength foundation bolt such as technical problem to be solved in the utility model is to provide a kind of electric power pylon for high-strength bolt basis, solution 42CrMo are forbidden fire song and cannot be used for the problem of inclined column foundation.

Electric power pylon for high-strength bolt basis disclosed in the utility model, comprise base plate, column and stone bolt, described column is connected on base plate, described embedding anchor bolts is in column, described column is the batter post with vertical direction with angle, described stone bolt is positioned on vertical direction, on described column, end face is positioned on horizontal plane, anchor slab is provided with bottom described stone bolt, described column external surface is enclosed with topping, four stone bolt are provided with in described column, described four stone bolt are with square arrangement, main muscle is enclosed with in described column, described column width B meets following formula:

$B\≥2(S/2+L\·i+\sqrt{2}b/2+C+d)$

Wherein, B is column width, and S is adjacent anchor bolt pitch, and L is foot bolt fastening length, and b is anchor slab width, and C is protective layer thickness, and d is main muscle diameter, and i is the column front gradient.

Described stone bolt material is for being 42CrMo.

The beneficial effects of the utility model are: in this electric power pylon basis, because stone bolt is vertically arranged, so fire song need not be carried out to it, solve the high-strength foundation bolt such as 42CrMo and forbid the problem that fire is bent, simultaneously, utilize inclined column foundation vertical load can offset the advantage of the moment of flexure that part of horizontal load produces, reduce column reinforcing bar and the base plate size by pressure-controlled, save engineering quantity, can be calculated by the formula of column width B simultaneously, minimum column width, thus saving engineering quantity reduces costs.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of common inclined column foundation;

Fig. 2 is the schematic diagram on batter post oblique top basis;

Fig. 3 is the schematic diagram of right cylinder ground spiral shell eccentric foundation;

Fig. 4 is the schematic diagram of right cylinder column eccentric foundation;

Fig. 5 is schematic diagram of the present utility model;

Fig. 6 is the schematic diagram of column of the present utility model.

Reference numeral: 1-base plate, 2-column, 3-stone bolt, 4-anchor slab, the main muscle of 5-, 6-topping.

Detailed description of the invention

Below in conjunction with accompanying drawing, the utility model is further illustrated.

As shown in Figure 5, the disclosed basis of the electric power pylon for high-strength bolt of the utility model, comprise base plate 1, column 2 and stone bolt 3, described column 2 is connected on base plate 1, described stone bolt 3 is embedded in column 2 in advance, described column 2 is the batter post with vertical direction with angle, described stone bolt 3 is positioned on vertical direction, on described column 2, end face is positioned on horizontal plane, anchor slab 4 is provided with bottom described stone bolt 3, described column 2 external surface is enclosed with topping 6, four stone bolt 3 are provided with in described column 2, described four stone bolt 3 are with square arrangement, main muscle 5 is enclosed with in described column 2, described column 2 width B meets following formula:

$B\≥2(S/2+L\·i+\sqrt{2}b/2+C+d)$

Wherein, B is column 2 width, and S is for being adjacent to foot bolt 3 spacing, and L is stone bolt 3 anchorage length, and b is anchor slab 4 width, and C is topping 6 thickness, and d is main muscle 5 diameter, and i is the column 2 front gradient.

Column 2 is in tilted layout the moment of flexure offsetting the generation of Part horizontal load, and stone bolt 3 vertically arranges to avoid carrying out fire song to it, therefore, this electric power pylon basis, while the material of saving own, minimizing engineering quantity, solves the high-strength foundation bolt such as 42CrMo 3 and forbids the problem that fire is bent.

Because the high-strength foundation bolt such as 42CrMo 3 forbid that fire is bent, so take anchor slab 4 form to reinforce, be adjacent to foot bolt 3 interval S and namely refer to the square length of side that four stone bolt 3 are formed, above-mentioned column 2 front gradient i refers to the tangent value of column 2 and vertical direction angle at this, and namely anchorage length refers to the distance between column 2 end face to anchor slab 4.

Can calculate the minimum widith of column 2 according to above-mentioned formula, after stone bolt 3 specification is determined, anchorage length L, anchor bolt pitch S, anchor slab width b are exactly fixing; Elemental cap layer C also determines under certain circumstances, and reinforcing bar main muscle 5 diameter column 2 widths affect is little.According to basic role power and geological conditions, regulate basic stand column 2 gradient i, along with the increase of i, basic stand column 2 width increases, and column 2 reinforcing bar reduces, and lower pressure-controlled base plate 1 width reduces, thus selects most economical column 2 width.

In such scheme, because stone bolt 3 need not be fiery bent, so as preferred embodiment, described stone bolt 3 material is 42CrMo.

Claims (2)

1. for the electric power pylon basis of high-strength bolt, comprise base plate (1), column (2) and stone bolt (3), described column (2) is connected on base plate (1), described stone bolt (3) is established and is embedded in column (2), it is characterized in that: described column (2) is the batter post with vertical direction with angle, described stone bolt (3) is positioned on vertical direction, the upper end face of described column (2) is positioned on horizontal plane, described stone bolt (3) bottom is provided with anchor slab (4), described column (2) external surface is enclosed with topping (6), four stone bolt (3) are provided with in described column (2), described four stone bolt (3) are with square arrangement, main muscle (5) is enclosed with in described column (2), described column (2) width B meets following formula:

Wherein, B is column (2) width; S is for being adjacent to foot bolt (3) spacing; L is stone bolt (3) anchorage length; b is anchor slab (4) width; C is topping (6) thickness, and d is main muscle (5) diameter, and i is column (2) the front gradient.

2., as claimed in claim 1 for the electric power pylon basis of high-strength bolt, it is characterized in that: described stone bolt (3) material is 42CrMo.