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Inclined strut device for bridge tower column construction and mounting structure

A technology for installing structures and bridge pylons, which is applied to bridges, bridge construction, bridge parts, etc., can solve the problems of heavy workload, low work efficiency, and high cost, and achieve good construction quality of bridge pylons, low time cost, and economic benefits Good results

Active Publication Date: 2021-09-07
GUANGXI UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are three traditional methods for controlling the stress of bridge tower columns: one is the full house support method, which has a large workload, low work efficiency and greater danger; the other is to set horizontal horizontal braces. Although this method reduces the workload, However, it cannot overcome the deformation and lateral displacement of the bridge tower column due to its own weight; the third is to use jacks to change the passive support in method 2 into active support. Although this method improves the shortcomings of the above two methods, the horizontal brace structure The horizontal bracing is relatively long, and the efficiency of horizontal bracing is low. In order to ensure the stability of the force, a large cross-section is adopted, resulting in a large weight. Therefore, the existing horizontal cross bracing is difficult, expensive, time-consuming and poor in reliability.
Especially when the bridge tower column is high and the slope is large, it is necessary to set up multiple horizontal horizontal braces or combine the above-mentioned solutions, and the disadvantages of the existing technology and equipment are becoming more and more prominent.

Method used

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  • Inclined strut device for bridge tower column construction and mounting structure
  • Inclined strut device for bridge tower column construction and mounting structure
  • Inclined strut device for bridge tower column construction and mounting structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment one: tension force F=200kN, bridge pylon column are subjected to the height h=28m of horizontal transverse force, change α angle (from small to large), calculate the lateral stress σ of f transverse and bridge pylon column root, And verify that the structure is safe.

[0058] Table 2

[0059]

[0060]

[0061] It can be seen from Table 2 that when F and h are constant, the smaller the α angle, the f 横向 The larger the , the stress σ generated by the self-weight of the pylon column 10 can be effectively offset. From the data in Table 2, it can be seen that when the α angle is within 45°, the stress σ of the concrete outside the 10 roots of the bridge tower column does not exceed 1MPa; when the α angle is less than 1°, the σ 钢筋 It is 201.377MPa, which exceeds the yield stress of the steel bar ([σ]=145MPa), so the α angle should not be less than 1°. To sum up, the value range of α angle should be 2°-45°.

Embodiment 2

[0062] Embodiment two: tension force F=400kN is set, the height h=28m of bridge pylon column 10 being subjected to horizontal transverse force, changes α angle (from small to large), calculates and obtains f 横向 and the external stress σ at the root of the bridge tower column 10, and verify whether the structure is safe.

[0063] table 3

[0064]

[0065]

[0066] It can be seen from Table 3 that when F and h are constant, the smaller the α angle is, the larger the lateral f of the diagonal bracing member 21 will be, which can effectively offset the stress σ generated by the self-weight of the pylon column 10. From the data in Table 2, it can be seen that when the α angle is within 45°, the stress σ of the concrete outside the 10 roots of the bridge tower column does not exceed 1MPa; when the α angle is less than 1°, the σ 钢筋 It is 201.377MPa, which exceeds the yield stress of the steel bar ([σ]=145MPa), so the α angle should not be less than 1°. To sum up, the value ra...

Embodiment 3

[0067] Embodiment three: tension force F=200kN is set, the height h=32m of bridge pylon column 10 being subjected to horizontal transverse force, changes α angle (from small to large), calculates and obtains f 横向 and the stress σ outside the root of the pylon column, and verify whether the structure is safe.

[0068] Table 4

[0069]

[0070]

[0071] It can be seen from Table 4 that when F and h are constant, the smaller the α angle, the larger the lateral f of the diagonal bracing member 21, which can effectively offset the stress σ generated by the self-weight of the pylon column 10. From the data in Table 2, it can be seen that when the α angle is 40°, the stress σ of the concrete outside the 10 roots of the pylon column exceeds 1 MPa; when the α angle is less than 1°, the σ 钢筋 It is 197.618MPa, which exceeds the yield stress of the steel bar ([σ]=145MPa), so the α angle should not be less than 1°. To sum up, the value range of α angle should be 2°-35°.

[0072] C...

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Abstract

The invention relates to the field of bridge tower construction, and discloses an inclined strut device for bridge tower column construction and a mounting structure. The device is characterized in that the the inclined strut device is manufactured, bridge tower columns are constructed step by step, the inclined strut device is mounted between the two tower columns in the construction process, and finally tension force is applied to the inclined strut device, so that the two tower columns are supported in the transverse bridge direction. A plurality of triangular cone inclined struts are adopted, and downward vertical force is applied to the top end of the inclined strut device, so that a plurality of horizontal thrusts in the transverse bridge direction are decomposed to act on the bridge tower columns, and tension strain generated by self weight and construction load on the outer sides of the bottoms of the bridge tower columns and the outer sides of the bridge tower columns at the first inclined strut is reduced. The method for applying the vertical force by the inclined strut device is simple, the internal force is adjustable, and the efficiency is high; under the requirement of the same supporting effect, the inclined strut device can remarkably reduce the number of temporary horizontal cross braces, compared with a traditional multi-channel horizontal cross brace, the cross section of a inclined strut component has the advantages of being small in cross section, light in weight, convenient and fast to construct and the like, and the inclined strut device has remarkable engineering significance and economic and social benefits.

Description

technical field [0001] The invention belongs to the field of bridge construction, and in particular relates to a diagonal bracing device and an installation structure for bridge tower and column construction. Background technique [0002] Most of the towers, towers, and cross bridges are designed as inclined structures, the purpose of which is to express the personality and visual effects of the towering bridge towers. The overall shape of the bridge reflects the architect's pursuit of aesthetics and cultural expression. More importantly, the design of the bridge tower column must be suitable for the arrangement of the stay cable or the main cable, the force transmission should be simple and clear, and under the action of the dead load, the bridge tower column should be in the state of axial compression as much as possible. Generally speaking, the layout of the bridge tower column has several types such as single column, A-shaped, inverted Y-shaped and H-shaped. Among them,...

Claims

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Application Information

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IPC IPC(8): E01D21/00E01D19/14
CPCE01D21/00E01D19/14
Inventor 龙夏毅王龙林杨涛郝天之黄海峰卓小丽
Owner GUANGXI UNIV
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