CN214280784U - Large-span space truss type high-voltage cable bridge - Google Patents
Large-span space truss type high-voltage cable bridge Download PDFInfo
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- CN214280784U CN214280784U CN202120447895.9U CN202120447895U CN214280784U CN 214280784 U CN214280784 U CN 214280784U CN 202120447895 U CN202120447895 U CN 202120447895U CN 214280784 U CN214280784 U CN 214280784U
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Abstract
The utility model relates to a high tension cable crane span structure, especially a large-span space truss-like high tension cable crane span structure, its structural feature lies in, including a plurality of standards span, adjacent two standards span passes through flange fixed connection, every standard span all includes by preceding vertical truss, back vertical truss, the four sides cylinder structure that upper horizontal truss and lower horizontal truss are constituteed, the length of upper horizontal truss is greater than lower horizontal truss length, the length difference is the product value of lower horizontal truss length and cable crane span structure disturbance degree limit value, and the upper horizontal truss is the arc structure of upwards arching. The utility model has the advantages that: the pre-arching treatment of the bridge is realized, the requirement of the normal use limit state of deformation of the large-span bridge is met, and the arrangement of the buttresses is reduced or cancelled, so that the engineering quantity is reduced, and the construction difficulty and the construction cost are reduced.
Description
Technical Field
The utility model relates to a high tension cable crane span structure, especially a large-span space truss-like high tension cable crane span structure.
Background
The high-voltage cable bridge is generally built above rivers (rivers) and roads, spans the rivers (rivers) and the roads, and is supported and processed by adopting vertical rods in the middle additionally arranged on the vertical rods in the upper and lower parallel direction. However, such a solution has the following problems: firstly, the passage of a river channel and a road is influenced, for the river channel, the arrangement of the buttress can influence the water passing section of the river channel, particularly the river channel with navigation requirements, and for the road, the arrangement of the buttress can influence the passage width and the passage safety on the road; secondly, the engineering quantity is large, the investment cost is high, and particularly, the difficulty of building a buttress foundation in the middle of a river channel is high.
Disclosure of Invention
An object of the utility model is to provide a reduce the current influence, reduce the engineering volume, reduce the construction degree of difficulty and construction cost's large-span space truss-like high tension cable crane span structure to river course and road according to prior art's weak point.
The purpose of the utility model is realized through the following ways:
the utility model provides a large-span space truss-like high tension cable crane span structure, its structural feature lies in, including a plurality of standard spans, two adjacent standard spans pass through flange fixed connection, every standard span all includes by preceding vertical truss, back vertical truss, the four sides cylinder structure that upper horizontal truss and lower horizontal truss constitute, the length of upper horizontal truss is greater than lower horizontal truss length, the length difference is the product value of lower horizontal truss length and cable crane span structure disturbance degree limit value, and the upper horizontal truss is the arc structure of upwards arching.
The utility model discloses a small length difference of horizontal truss about setting up, this small length difference is about 0.2% -0.5% of horizontal truss down. Therefore, after each standard span section is connected end to end, the whole bridge frame forms a micro-arch structure in an upward arc shape due to the accumulated length difference between the upper horizontal truss and the lower horizontal truss, thereby realizing the pre-arch treatment of the bridge frame, greatly reducing the vertical deformation of the middle section of the bridge frame, meeting the requirement of the normal use limit state of the deformation of the large-span bridge frame, reducing or canceling the arrangement of buttresses, reducing the engineering quantity and lowering the construction difficulty and the construction cost.
The utility model discloses can further specifically do:
the flange is including flange board and the stiffening rib that distributes on the flange board, and the flange board is the slope gradient structure of by a lateral opposite side thickness gradual change in the axial, and the slope gradient is cable testing bridge disturbance degree limit value.
When the standard span sections are connected, the connecting flange with the gradient structure can be matched with the radian and the gradient of the standard span sections to be fixedly connected, so that the fitting degree and the stability of the joint of the two standard span sections are ensured.
And a cable channel and an overhaul channel are arranged in the standard span, wherein the cable channel comprises a support vertical limb plate and a support angle steel horizontal limb connected with the support vertical limb plate through a support node plate, and the support vertical limb plate is welded and connected with a web member in the front vertical truss or the rear vertical truss.
The bridge frame adopts an open structure, and the limb plates for cable laying are directly welded on the side truss so as to reduce the dead weight of the bridge frame.
The upper surface of the lower horizontal truss in the standard span is paved with a figured steel plate, and the upper part of the upper horizontal truss is paved with a sun shield.
The flower steel plate is used for cable maintenance, ensures cable normal operating, and the sunshading board then is used for preventing the influence of sunshine irradiation to cable current-carrying capacity.
To sum up, the utility model provides a large-span space truss-like high tension cable crane span structure, it is poor with the length of lower horizontal truss through setting up the horizontal truss, and make the horizontal truss be the structure of encircleing a little, thereby the structure of crane span structure is handled with the mode of encircleing in advance, after (cable laying finishes) the crane span structure can not appear downwarping deformation after reaching loading vertical load, solve the problem that the crane span structure is difficult to control vertical deformation under the vertical load effect, the normal use extreme condition requirement that large-span crane span structure (span exceeded 30M) warp has been satisfied, reduce or cancel the setting of buttress, thereby engineering volume has been reduced, construction degree of difficulty and construction cost have been reduced.
Drawings
Fig. 1 is a schematic front view of a standard span in a large-span space truss type high-voltage cable bridge of the present invention;
fig. 2 is a schematic plan view of a flange between standard spans according to the present invention;
fig. 3 is a schematic sectional structure view of the long-span space truss type high-voltage cable bridge of the present invention;
fig. 4 is a schematic front view of the large-span space truss-type high-voltage cable bridge of the present invention.
The present invention will be further described with reference to the following examples.
Detailed Description
The best embodiment is as follows:
referring to the attached drawings 1-4, the large-span space truss type high-voltage cable bridge comprises a plurality of standard spans, wherein two adjacent standard spans are fixedly connected through flanges, each standard span comprises a four-face cylinder structure consisting of two vertical trusses 3 (a front vertical truss and a rear vertical truss) and two horizontal trusses (an upper horizontal truss 1 and a lower horizontal truss 2), the upper horizontal truss 1 and the two vertical trusses 3 share two upper chords, and the lower horizontal truss 2 and the two vertical trusses 3 share two lower chords. The vertical truss bears the vertical load (such as the dead weight of a cable and a structure) of the cable bridge, the horizontal truss bears the horizontal load (such as the wind load) of the cable bridge, and the four trusses form a spatial integral type stress system. The chord members (the upper chord member and the lower chord member) and the web members of each truss are welded by hot-rolled square steel pipes and steel plates. The standard span can be manufactured in a factory, the steel pipe flanges are spliced on site, and the number of sections can be determined according to the site span.
The length of the upper horizontal truss 1 is greater than that of the lower horizontal truss 2, the length difference is the product value of the length K of the lower horizontal truss 2 and the cable bridge deflection limit value f, and the upper horizontal truss 1 is in an upwards arched arc structure. For example, each standard span length is K =6 m, each cable tray may be composed of n standard spans, and the lower horizontal truss 2 has a length of 6000mm, a disturbance factor limit value f =1/300, and a length difference δ = K × f =20 mm. Therefore, the crane span structure adopts the mode of arching in advance to handle the structure to reaching behind the vertical load of loading (after cable laying finishes) the crane span structure downward bending deformation can not appear, arching the length difference of mode about adjusting the crane span structure in advance and realizing.
The flange is a square flange adapted to a hot-rolled square steel pipe, as shown in fig. 1-2, and comprises a flange plate 10 and stiffening ribs 11 distributed on the flange plate 10, wherein the flange plate 10 is of a gradient structure with the thickness gradually changed from one side to the other side in the axial direction, the gradient is a cable bridge deflection limit value, and the gradient of the flange surface slope is matched with the length difference of an upper chord and a lower chord so as to achieve the purpose that the standard cross flanges can be tightly attached. When mounting, the side with large thickness is on the upper side. The size and the number of the bolts on the flange plate 10 are determined according to actual engineering calculation.
Be provided with cable channel and maintenance passageway in the standard span section, wherein cable channel includes support vertical limb board 5 and the horizontal limb 6 of support angle steel that is connected with support vertical limb board 5 through support gusset plate 7, support vertical limb board 5 and preceding vertical truss or the web member welded connection in the vertical truss of back. The vertical limb plates 5 of the bracket are made of steel plates, and bolt holes with the diameter phi of 17.5 and the interval of 80 are formed in the vertical limb plates, so that the vertical interval of the bracket can be adjusted, and the cable laying requirements of different diameters can be met.
In order to facilitate the cable maintenance and the normal operation of the cable, the pattern steel plate 9 is laid on the upper surface of the horizontal truss below the bridge, so that the maintenance personnel can walk conveniently, and the sun shield 8 is laid on the top of the bridge, namely the upper part of the horizontal truss, so that the influence of sunlight irradiation on the current-carrying capacity of the cable is prevented.
The part of the utility model which is not described is the same as the prior art.
Claims (4)
1. The utility model provides a large-span space truss-like high tension cable crane span structure, a serial communication port, including a plurality of standard spans, two adjacent standard spans pass through flange fixed connection, every standard span all includes the four sides cylinder structure of constituteing by preceding vertical truss, back vertical truss, upper horizontal truss and lower horizontal truss, the length of upper horizontal truss is greater than lower horizontal truss length, the length difference is the product value of lower horizontal truss length and cable crane span structure degree of interference limit value, and the upper horizontal truss is the arc structure of upwards arching.
2. The large-span spatial truss type high-voltage cable tray as claimed in claim 1, wherein the flanges comprise flange plates and stiffening ribs distributed on the flange plates, the flange plates are of an inclined slope structure with gradually changed thickness from one side to the other side in the axial direction, and the inclined slope is a cable tray deflection limit value.
3. The large-span space truss type high-voltage cable bridge stand of claim 1, wherein a cable channel and an access channel are arranged in the standard span, wherein the cable channel comprises a support vertical limb plate and a support angle steel horizontal limb connected with the support vertical limb plate through a support node plate, and the support vertical limb plate is welded with a web member in the front vertical truss or the rear vertical truss.
4. The large-span space truss type high-voltage cable tray as claimed in claim 1, wherein a figured steel plate is laid on the upper surface of the lower horizontal truss in the standard span, and a sunshade is laid above the upper horizontal truss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120447895.9U CN214280784U (en) | 2021-03-02 | 2021-03-02 | Large-span space truss type high-voltage cable bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120447895.9U CN214280784U (en) | 2021-03-02 | 2021-03-02 | Large-span space truss type high-voltage cable bridge |
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| CN214280784U true CN214280784U (en) | 2021-09-24 |
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| CN202120447895.9U Active CN214280784U (en) | 2021-03-02 | 2021-03-02 | Large-span space truss type high-voltage cable bridge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114123064A (en) * | 2021-11-22 | 2022-03-01 | 浙江华云电力工程设计咨询有限公司 | Cable bridge frame shading device capable of being integrally assembled and easy to maintain and application |
| CN114825219A (en) * | 2022-06-09 | 2022-07-29 | 江苏丛森机电科技有限公司 | Integral ultra-large span bridge and manufacturing method thereof |
-
2021
- 2021-03-02 CN CN202120447895.9U patent/CN214280784U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114123064A (en) * | 2021-11-22 | 2022-03-01 | 浙江华云电力工程设计咨询有限公司 | Cable bridge frame shading device capable of being integrally assembled and easy to maintain and application |
| CN114123064B (en) * | 2021-11-22 | 2024-03-29 | 浙江华云电力工程设计咨询有限公司 | Integral assembled cable bridge sunshade device easy to overhaul and application |
| CN114825219A (en) * | 2022-06-09 | 2022-07-29 | 江苏丛森机电科技有限公司 | Integral ultra-large span bridge and manufacturing method thereof |
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