Temporary cable saddle device on the top of the tower that can quickly unload prestressed

Abstract

The present invention relates to the technical field of bridge rotation construction, and in particular to a temporary cable-stayed saddle device for a tower top capable of rapidly unloading prestressed structures. The device comprises a limiting seat, symmetrically arranged cable saddles within the limiting seat, and slidingly arranged along the length direction of the limiting seat. A tensioning structure is provided through the lower portions of the two saddles, and a temporary tensioning structure is provided on the upper portions of the opposite and distant ends of the two saddles. A limiting structure is provided between the limiting seat and the two saddles. The tensioning structure comprises tensioning bolts provided through the lower portions of the two saddles, and the temporary tensioning structure comprises a temporary stay cable provided through the upper portions of the opposite and distant ends of the two saddles. The present invention facilitates the rapid unloading of the temporary stay cable, improves construction efficiency and safety, and reduces construction costs. It overcomes the shortcomings of existing temporary stay cable saddles, which have the characteristics of large overhead work load, slow unloading speed, and high construction cost.

Description

Technical Field

[0001] The invention relates to the technical field of bridge rotation construction, in particular to a temporary tower top tension cable saddle device capable of quickly unloading prestressed material. Background Art

[0002] Bridge rotation construction technology is a relatively mature and widely applicable bridge construction technique, with horizontal rotation being the most widely used. Bridge rotation construction is widely used in bridges spanning deep valleys, rapids, difficult-to-install river channels, and overpasses. It minimizes impacts on traffic below the bridge, reduces lifting costs, and offers safety, reliability, and excellent integrity.

[0003] In the horizontal rotation construction method of a rotating bridge, a rotation scheme that sets up temporary cable towers on the top of the beam pier to form a "temporary cable-stayed bridge" is more convenient for maintaining the overall alignment of the bridge than the currently widely used double-cantilever rotation construction. In this construction method, temporary cable stays are symmetrically tensioned on the saddles at the top of the temporary cable towers. After construction is completed, the temporary cable stays need to be unloaded and removed. Therefore, after construction is completed, it is necessary to unanchor the cable saddles at the top of the temporary cable towers. This requires repeated mobilization of specialized equipment such as jacks and construction personnel, which prolongs the construction period and reduces construction efficiency. At the same time, the workload of high-altitude operations is large. The high-altitude hoisting and high-altitude welding operations at the top of the tower have a significant impact on the operational safety of the nearby railway, increasing construction risks and costs. Summary of the Invention

[0004] The purpose of the present invention is to provide a temporary tower top cable saddle device that can quickly unload prestressed material to solve the above problems. It is convenient for quickly unloading temporary inclined cables, improves construction efficiency and safety, and reduces construction costs. It overcomes the shortcomings of existing temporary cable saddles, such as large amount of high-altitude operations, slow unloading speed of temporary inclined cables, and high construction costs.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A temporary tensioning saddle device for a tower top capable of quickly unloading prestressed material comprises a limiting seat, wherein saddles are symmetrically arranged in the limiting seat, and the saddles are slidably arranged along the length direction of the limiting seat, a tensioning structure is passed through the lower parts of the two saddles, a temporary tensioning structure is provided on the upper parts of the ends of the two saddles that are opposite and far away from each other, and a limiting structure is provided between the limiting seat and the two saddles;

[0007] The tensioning structure includes tensioning bolts passing through the lower parts of the two cable saddles, and the temporary tensioning structure includes a temporary inclined cable passing through the upper parts of the ends of the two cable saddles that are opposite and far away from each other.

[0008] Preferably, the limiting structure includes a plurality of limiting bolt mounting holes opened on the front and rear side walls of the limiting seat, and the plurality of limiting bolt mounting holes are divided into two groups. The two groups of limiting bolt mounting holes are symmetrically arranged along the center line of the limiting seat, and the front and rear side walls of the opposite ends of the two saddles are provided with a plurality of limiting bolt through holes, and the limiting bolt through holes are arranged corresponding to the limiting bolt mounting holes, and limiting bolts are passed through the limiting bolt through holes and the limiting bolt mounting holes.

[0009] Preferably, at least two tension screw holes are opened on the outer end surface of the saddle, and the tension bolts are passed through the tension screw holes.

[0010] Preferably, both ends of the tension bolt are threadedly connected with adjusting nuts, and two arc-shaped gaskets are sleeved on both ends of the tension bolt. The two arc-shaped gaskets are located inside the adjusting nut, and the arc-shaped surfaces of the arc-shaped gaskets are in contact with the end of the saddle.

[0011] Preferably, steel strand anchor holes are provided on opposite sides of the upper portions of the two saddles, ribs are provided inside opposite sides of the upper portions of the saddles, and the temporary stay cables are passed through the steel strand anchor holes.

[0012] Preferably, the bottom of the saddle is provided with an inner support point and an outer support point, the outer support point is located at the bottom of two opposite sides of the saddle, and the outer support point is located in the middle of the bottom surface of the saddle.

[0013] Preferably, a partition rib is provided on the inner side of the inner end surface of the saddle, and the partition rib is located between the two tension bolts.

[0014] The present invention has the following technical effects:

[0015] The present invention uses a temporary inclined cable to make the two saddles move relative to each other to achieve rapid unloading of the cable saddle, without the need for professional equipment such as jacks and personnel to unload the anchor, thus saving construction costs and construction time;

[0016] The main components of the present invention are all connected by bolts, which makes installation and disassembly easy during construction, improves construction speed, and has low processing costs, saving construction costs;

[0017] After the rotation construction is completed, the main components of the present invention can be dismantled and recycled, saving construction materials, further reducing construction costs, and being economical and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the top view of the structure of the present invention;

[0021] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of AA;

[0022] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure of the middle BB;

[0023] Figure 5 This is a schematic diagram of the main structure of the present invention during prestress unloading;

[0024] Figure 6 This is a schematic diagram of the top view of the structure of the present invention when prestressing is unloaded;

[0025] Figure 7 for Figure 2 Schematic diagram of the cross-sectional structure of DD;

[0026] Figure 8 for Figure 6 Schematic diagram of the cross-sectional structure of EE;

[0027] Figure 9 for Figure 1 Schematic diagram of the cross-sectional structure of CC;

[0028] Figure 10 This is a schematic diagram of the tension bolt structure of the present invention;

[0029] Figure 11 This is a diagram of the structural components of the saddle of the present invention;

[0030] Figure 12 It is a structural schematic diagram of the limit seat of the present invention.

[0031] Among them, 1. Saddle; 101. Temporary stay cable; 102. Steel strand anchor hole; 103. Rib; 104. Limit bolt through hole; 105. Outer end face of saddle; 1051. Tension screw hole; 106. Inner end face of saddle; 1061. Partition rib; 107. Inner support point; 108. Outer support point; 2. Limit seat; 201. Limit bolt; 202. Limit bolt mounting hole; 3. Tension bolt; 301. Adjusting nut; 302. Arc-shaped gasket. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Reference Figure 1-12 As shown, the present invention provides a temporary tensioning saddle device for a tower top capable of quickly unloading prestress, comprising a limiting seat 2, symmetrically provided with saddles 1 in the limiting seat 2, the saddles 1 being slidably arranged along the length direction of the limiting seat 2, a tensioning structure being provided at the lower portion of the two saddles 1, a temporary tensioning structure being provided at the upper portion of one end of the two saddles 1 that is opposite and away from each other, and a limiting structure being provided between the limiting seat 2 and the two saddles 1;

[0035] The tensioning structure includes tensioning bolts 3 passing through the lower parts of the two saddles 1 , and the temporary tensioning structure includes temporary inclined cables 101 passing through the upper parts of the ends of the two saddles 1 that are opposite and far away from each other.

[0036] A further optimization scheme is provided, in which the limiting structure includes a plurality of limiting bolt mounting holes 202 provided on the front and rear side walls of the limiting seat 2, and the plurality of limiting bolt mounting holes 202 are divided into two groups. The two groups of limiting bolt mounting holes 202 are symmetrically arranged along the center line of the limiting seat 2, and a plurality of limiting bolt through holes 104 are provided on the front and rear side walls at the opposite ends of the two saddles 1. The limiting bolt through holes 104 are arranged corresponding to the limiting bolt mounting holes 202, and limiting bolts 201 are passed through the limiting bolt through holes 104 and the limiting bolt mounting holes 202.

[0037] According to a further optimized solution, the outer end surface 105 of the saddle 1 is provided with at least two tension screw holes 1051 , and the tension bolts 3 are passed through the tension screw holes 1051 .

[0038] To further optimize the solution, the two ends of the tension bolt 3 are threadedly connected with an adjusting nut 301, and two arc-shaped gaskets 302 are sleeved on both ends of the tension bolt 3. The two arc-shaped gaskets 302 are located on the inner side of the adjusting nut 301, and the arc-shaped surface of the arc-shaped gasket 302 is in contact with the end of the saddle 1.

[0039] According to a further optimization scheme, steel strand anchor holes 102 are provided on the upper opposite sides of the two saddles 1 , ribs 103 are provided inside the upper opposite sides of the saddles 1 , and temporary inclined cables 101 are installed through the steel strand anchor holes 102 .

[0040] According to a further optimized solution, an inner support point 107 and an outer support point 108 are provided at the bottom of the saddle 1 . The outer support point 108 is located at the bottom of two opposite sides of the saddle 1 , and the outer support point 108 is located in the middle of the bottom surface of the saddle 1 .

[0041] According to a further optimized solution, a partition rib 1061 is provided on the inner side of the inner end surface 106 of the saddle 1 , and the partition rib 1061 is located between the two tension bolts 3 .

[0042] The quick disassembly method of the present invention is as follows:

[0043] 1) Fix the installation limit seat 2 to the top of the temporary inclined tower, and fix the saddle 1 on one side with the limit bolt 201 to form a limit slideway;

[0044] 2) The tension bolt 3 passes through the reserved tension screw hole 1051, and the adjusting nut 301 and the arc-shaped washer 302 are installed on the two free ends of the tension bolt 3;

[0045] 3) Tighten the limit bolt 201 on the limit seat 2, tighten the adjusting nut 301, merge the left and right saddles 1, and install the device on the top support of the temporary inclined tower;

[0046] 4) Tensioning the temporary stay cables 101, followed by construction of the rotating bridge;

[0047] 5) After the rotation construction is completed, remove the limit bolt 201 of the limit seat 2, loosen the adjusting nut 301 on the tension bolt 3, and separate the left and right saddles 1. First, the left and right saddles 1 move in opposite directions on the horizontal slide of the limit seat 2, and the left and right saddles 1 separate horizontally; when the left and right saddles 1 move relative to each other for a certain distance, the outer support points 108 of the left and right saddles 1 slide into the inclined slide part, while the inner support point 107 remains in the horizontal slide, and the left and right saddles 1 tilt outward and separate. The temporary inclined cable 101 is easier to relax at a large angle, realizing the rapid unloading of the tension saddle;

[0048] 6) The saddle 1, the tension bolt 3, the limit bolt 201 and the limit seat 2 can all be disassembled for reuse.

[0049] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A temporary cable saddle device on the top of the tower that can quickly unload prestressed material, characterized in that: It comprises a limiting seat (2), wherein a saddle (1) is symmetrically arranged in the limiting seat (2), and the saddle (1) is slidably arranged along the length direction of the limiting seat (2), a pulling structure is passed through the lower parts of the two saddles (1), and a temporary tensioning structure is provided on the upper parts of the ends of the two saddles (1) that are opposite and far away from each other, and a limiting structure is provided between the limiting seat (2) and the two saddles (1); The tensioning structure comprises tensioning bolts (3) passing through the lower parts of the two cable saddles (1), and the temporary tensioning structure comprises a temporary inclined cable (101) passing through the upper parts of the ends of the two cable saddles (1) that are opposite and far away from each other; The outer end surface (105) of the saddle (1) is provided with at least two tension screw holes (1051), and the tension bolts (3) are passed through the tension screw holes (1051); The bottom of the saddle (1) is provided with an inner support point (107) and an outer support point (108), wherein the outer support point (108) is located at the bottom of two opposite sides of the saddle (1), and the outer support point (108) is located in the middle of the bottom surface of the saddle (1).

2. The temporary tower top tension cable saddle device capable of quickly unloading prestress according to claim 1 is characterized in that: The limiting structure comprises a plurality of limiting bolt mounting holes (202) provided on the front and rear side walls of the limiting seat (2), the plurality of limiting bolt mounting holes (202) being divided into two groups, the two groups of limiting bolt mounting holes (202) being symmetrically arranged along the center line of the limiting seat (2), a plurality of limiting bolt through holes (104) being provided on the front and rear side walls at opposite ends of the two saddles (1), the limiting bolt through holes (104) being provided corresponding to the limiting bolt mounting holes (202), and limiting bolts (201) being passed through the limiting bolt through holes (104) and the limiting bolt mounting holes (202).

3. The temporary tower top tension cable saddle device capable of quickly unloading prestress according to claim 1 is characterized in that: The two ends of the tension bolt (3) are threadedly connected with an adjusting nut (301), and two arc-shaped washers (302) are sleeved on the two ends of the tension bolt (3). The two arc-shaped washers (302) are located on the inner side of the adjusting nut (301), and the arc-shaped surfaces of the arc-shaped washers (302) are in contact with the end of the saddle (1).

4. The tower top temporary tension cable saddle device capable of quickly unloading prestress according to claim 1 is characterized in that: Steel strand anchor holes (102) are provided on the opposite sides of the upper parts of the two cable saddles (1), ribs (103) are provided inside the opposite sides of the upper parts of the cable saddles (1), and the temporary inclined cables (101) are arranged through the steel strand anchor holes (102).

5. The temporary tower top tension cable saddle device capable of quickly unloading prestressed material according to claim 1 is characterized in that: A partition rib (1061) is provided on the inner side of the inner end surface (106) of the saddle (1), and the partition rib (1061) is located between the two tension bolts (3).

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