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Suspension bridge with bearing cable having X-shaped curve

A suspension bridge and cable technology, applied in the field of bridge structure, can solve the problems of unable to increase the rise-span ratio, insufficient lateral stability, unable to improve the lateral stability, etc., and achieve the effect of improving the lateral stability and large lateral rise-span ratio

Inactive Publication Date: 2012-12-05
张志新
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Luo Xiheng, Xiao Rucheng, and Xiang Haifan provided a suspension bridge in which the mid-span load-bearing cables have a horizontal curve shape in the article "Analysis of the Main Cable Line Shape of Space Cable Suspension Bridge", such as figure 1 , figure 2 As shown, the load-bearing cable with two main cables separated and with a horizontal curve shape can provide lateral tension, thereby increasing lateral stability, but when the bridge span is large, the lateral rise-span ratio of the load-bearing cable (curve rise and span ratio) is small, providing insufficient lateral stability
[0003] At present, the load-bearing cables of self-anchored suspension bridges often adopt the shape of space curves with vertical and horizontal curves, which is equivalent to figure 1 , figure 2 The shape of the half bridge is limited by the span and the width of the carriageway girder, the rise-span ratio cannot be increased, and the lateral stability cannot be improved

Method used

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  • Suspension bridge with bearing cable having X-shaped curve
  • Suspension bridge with bearing cable having X-shaped curve
  • Suspension bridge with bearing cable having X-shaped curve

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Such as image 3 , Figure 4 As shown, the suspension bridge of the X-shaped curve load-bearing cable of the present invention is made of bridge tower 1, load-bearing cable 2, carriageway beam 3, anchorage 4, and load-bearing cable is made of two main cables, is respectively placed on bridge tower 1 top. On the two saddles, both ends are anchored on the anchorage 4, and the load-bearing cable is anchored on the carriageway beam 3 at the middle point of the mid-span, and the two main cables cross between the bridge tower and the anchor point to form an X shape. There are struts 21 between the main cables; wherein, there are hoops 241 on the struts 21, the distance between the main cables is controlled by the length of the struts 21, and the number of struts 21 is determined by calculation according to the overall stability and force requirements; The load-bearing cable 2 is provided with a ferrule 241 at the middle point of the span, and a connecting piece 22 is arrange...

Embodiment 2

[0040] Such as Figure 5 As shown, the two main cables between the pylon and the anchor point are fixed close to each other to form an X shape with a tension device 24 .

[0041] Such as Figure 8 As shown, the two main cables forming the load-bearing cables are composed of two cables respectively, and the cables are combined by a clamp 23 , the clamp has a suspension point of the sling 5 , and the sling 5 is suspended on the clamp 23 .

[0042] Such as Figure 9 As shown, the tension device 24 is composed of two hoops 241 and two tie rods 242, the length of the tie rods is less than 1 / 5 of the distance between the two saddles on the pylon, and two hoops are respectively connected to the two ends of the tie rods 242 241. The inner cavity of the hoop matches the cross-sectional shape of the main cable.

[0043] In the second step above, in addition to installing the braces or fixing the load-bearing cables with temporary support rods, the tension device 24 should also be ins...

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Abstract

The invention relates to a suspension bridge with a bearing cable having an X-shaped curve, belonging to the field of bridge engineering. The suspension bridge comprises a carriageway beam, a bridge tower, an anchor span and a bearing cable, wherein a middle point of the bearing cable on a mid-span is anchored on the carriageway beam; and two main cables form an X shape between the bridge tower and the anchor point by crossing the two main cables or by shortening the horizontal distance of the two main cables at the certain part between the bridge tower and the anchor point, wherein a bearingpull device is arranged between the main cable at the certain part; and a stay bar is arranged between the two main cables. During construction, the main cables are mounted to be in a free overhang state and the shapes of the main cables are adjusted by using a supporting and pulling device; the stay bar or a temporary support rod is arranged for fixing, so that the bearing cable forms the X shape and finally a carriageway beam section is hoisted. The suspension bridge disclosed by the invention provides greater transverse rise to span ratio when the suspension bridge has the same span, so that the integral transverse stability of the bridge is improved.

Description

technical field [0001] The invention relates to a bridge structure, in particular to a suspension bridge structure with load-bearing cables having horizontal curves. Background technique [0002] A suspension bridge is a long-span bridge. Known suspension bridge structure is made of bridge pylon, anchorage, load-bearing cable, driveway beam and sling, load-bearing cable is vertical curve, two ends are fixed on the anchorage, is connected load-bearing cable and driveway beam by sling. Luo Xiheng, Xiao Rucheng, and Xiang Haifan provided a suspension bridge in which the mid-span load-bearing cables have a horizontal curve shape in the article "Analysis of the Main Cable Line Shape of Space Cable Suspension Bridge", such as figure 1 , figure 2 As shown, the load-bearing cable with two main cables separated and with a horizontal curve shape can provide lateral tension, thereby increasing lateral stability, but when the bridge span is large, the lateral rise-span ratio of the l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D11/02E01D19/16E01D21/00
Inventor 张志新
Owner 张志新