Counter-force frame for cable saddle incremental launching construction

Abstract

The utility model discloses a counter-force frame for cable saddle incremental launching construction. The counter-force frame and a grid embedded in a main tower are of a split structure. When the cable saddle is subjected to incremental launching construction, the counter-force frame is fixed on the side span side of the main tower and is matched with the grating; the counter-force frame is provided with a box-type base body and a plurality of groups of counter-force seats, a plurality of groups of through holes are formed in the box-type base body, and the groups of counter-force seats are connected to a rear end plate of the box-type base body side by side at intervals and are of an integral structure with the box-type base body; when the side span side of the main tower is fixed, the front end plate of the box type base body is close to the side span side tower wall of the main tower, all the penetrating holes in the box type base body and all the tensioning channels in the main tower form a one-to-one corresponding matching relation, and all the prestress tensioning assemblies penetrating out of the corresponding tensioning channels in the main tower are anchored at the position of the rear end plate of the box type base body. According to the utility model, the overall structural strength is high, the anchoring stress acted by the prestress tension assembly can be reliably diffused, the local stress is prevented from being too large, and the main tower is relatively friendly to a concrete structure forming the main tower.

Description

Technical Field

[0001] The utility model relates to a supporting structure for cable saddle jacking construction of a suspension bridge, in particular to a reaction frame for cable saddle jacking construction. Background Art

[0002] In a suspension bridge structure, the saddles supported on the main towers (or piers, hereinafter the same) are key load-bearing components that support and steer the main cables. To ensure reliable and long-term support from the main towers, steel gratings are pre-embedded in the main towers. During the construction of a suspension bridge, to ensure that the main towers supporting the main cables maintain a balanced load as the bridge's assembly load changes, the saddles (usually the main cable saddles) supported by the gratings are initially pre-deflected a certain distance toward the side spans. As the bridge's assembly load changes, the saddles are progressively pushed upwards on the gratings toward the mid-span to balance the forces acting on the main cables on the side and mid-spans. This prevents the main towers from bending toward the mid-span beyond the design requirements in the later stages of bridge construction or after completion. The industry refers to this step-by-step displacement of the saddles on the gratings from the side spans to the mid-spans as jacking construction or jacking operations.

[0003] In order to meet the requirements of the jacking construction of the cable saddle on the grid, a jacking support reaction frame needs to be formed at the side end of the side span of the grid. Figure 1 As shown, the reaction frame A is formed as an integral structure at the side span end of the grid B. The lower part of the reaction frame A protrudes downward from the bottom of the grid B and is used to sit on the bracket C (i.e., reaction support, the same below) on the side span side wall of the main tower. The upper part of the reaction frame A protrudes upward from the top of the grid B and is used to arrange the hydraulic jack for pushing the cable saddle. Figure 1 The combined structure of the reaction frame and grille shown in the figure shows that the reaction frame is actually composed of three integrated parts: one is the horizontal extension of the side span end of the box-type structure grille from the side span side tower wall; one is the upward-protruding support structure at the top of the grille side span extension end; and the other is the downward-protruding support structure at the bottom of the grille side span extension end. After the saddle jacking construction is completed, the reaction frame portion of the grille with a reaction frame needs to be cut away along the edge of the main tower (that is, the part of the grille side span extending from the main tower) along the edge of the main tower. In other words, the reaction frame on the grille is not a permanent structure, but only a temporary structure for jacking construction.

[0004] Since the box-type structural grille supporting the cable saddle on the main tower is a large steel structure, the integral formation of the reaction frame on the grille further increases the structural volume and weight of the grille. This poses technical difficulties for the grille as a large structure in the manufacturing, transportation and installation processes, especially the transportation process. In order to solve such technical problems, the industry has designed various split and combined grilles, which include separating the reaction frame from the grille. For example, the Chinese patent document disclosed the name "Prestressed jacking structure of the main cable saddle of the suspension bridge", publication number CN 210066498 U, publication date February 14, 2020, and the name "Reaction frame assembly", publication number CN117947702 A, publication date April 30, 2024, etc. The technology of separating the reaction frame from the grille allows for the grille to be embedded in the top of the main tower during construction. A tensioning channel is then formed on the main tower below the grille. The reaction frame is then secured through prestressed tensioning components installed within the tensioning channel, allowing it to mate with the grille embedded in the main tower. The separate molding of the reaction frame and the grille significantly reduces the size of the grille, which not only reduces the technical difficulty of manufacturing and transporting the grille and reaction frame, but also reduces the technical difficulty of removing the reaction frame from the main tower after the jacking construction is completed. The reaction frame can even be made into a universal component that can be used with different grilles multiple times in different construction environments (of course, the compatibility of the grilles in different construction environments should be considered), resulting in significant economic benefits.

[0005] As for the technologies of the above-mentioned publication numbers CN 210066498 U and CN 117947702 A, the reaction frame is composed of an end plate (or mounting plate) and a plurality of vertical ribs and a plurality of transverse ribs welded on the rear side of the end plate; at the same time, in order to adapt to the installation and connection of the prestressed tensioning components, an anchor seat is also welded on the rear side of the end plate used for forming perforations. The anchor seat is composed of two upper and lower transverse support plates welded on the rear side of the end plate, and an anchor plate welded at the end of the transverse support plate. However, due to the gravity of the reaction frame and the stress characteristics of its matching grid on the main tower, huge tensioning force is required to fix it on the main tower. In this way, the force exerted on the end plate by each set of prestressed tensioning components through the corresponding anchor seat is huge. In addition, it is almost difficult for the end plate to form a 100% surface connection on the side span side tower wall of the main tower, so that there is excessive local stress in the end plate area facing each anchor seat, that is, there is excessive local stress around the end plate used for installing the prestressed tensioning components, which makes its load-bearing capacity for tensioning relatively limited and is also prone to damage to the concrete structure constituting the main tower.

[0006] Therefore, the reaction frame forming structure that forms a separate structure with the grid needs to be improved. Utility Model Content

[0007] The technical purpose of the present utility model is to provide a reaction frame for cable saddle jacking construction that can diffuse the anchoring stress exerted by the prestressed tensioning assembly, can bear large tensioning forces, and is relatively friendly to the concrete structure constituting the main tower, in view of the particularity of the separated structure of the reaction frame and the grid and the fixation of the reaction frame on the main tower, as well as the shortcomings of the existing technology.

[0008] The technical purpose of the utility model is achieved through the following technical solutions: a reaction frame for cable saddle jacking construction, wherein the reaction frame and the grid embedded on the main tower are separate structures;

[0009] When the cable saddle supported by the grid is pushed forward, the reaction frame is fixed to the side span of the main tower through the prestressed tensioning assembly and cooperates with the grid embedded in the main tower;

[0010] The reaction frame comprises a box-shaped base and a plurality of reaction seats. The box-shaped base is provided with a plurality of through holes that match the tensioning channels on the main tower. The reaction seats are connected side by side to the rear end plate of the box-shaped base and form an integral structure with the box-shaped base.

[0011] When the reaction frame is fixed on the side span of the main tower, the front end plate of the box-type base is close to the side span tower wall of the main tower, and the through holes on the box-type base form a one-to-one corresponding matching relationship with the tensioning channels on the main tower. The prestressed tensioning components that pass through the corresponding tensioning channels on the main tower are respectively anchored at the rear end plate of the box-type base.

[0012] The above technical measures are aimed at the special features of the separated structure of the reaction frame and the grid, and the fixation of the reaction frame on the main tower. The reaction frame is composed of a box-type structure base and a plurality of reaction seats integrally formed on the box-type base. The box-type base itself is used as an anchor seat for installing the prestressed tensioning component, and there is no need to form an additional anchor seat. Not only does the overall structural strength of the reaction frame be high and the moment it can bear be large, but the box-type base itself is used as an anchor seat to install the prestressed tensioning component, which can reliably diffuse the anchoring stress applied by the prestressed tensioning component to avoid excessive local stress, thereby being able to bear greater tensioning force. It is also relatively friendly to the concrete structure constituting the main tower. Under the action of large tensioning force, the box-type base is not likely to cause damage to the concrete structure constituting the main tower.

[0013] As one of the preferred technical solutions, when the reaction frame is fixed on the side span side of the main tower, a transition support plate is provided between the front end plate of the box-type base and the side span side tower wall of the main tower;

[0014] The supporting contact surface of the transition support plate is smaller than the front end plate surface of the box-shaped base, and the transition support plate is provided with holes matching the through holes on the box-shaped base;

[0015] One side surface of the transition support plate abuts against the side span tower wall of the main tower, and the other side abuts against the front end plate of the box-type base. The prestressed tensioning components that pass through the corresponding tensioning channels on the main tower pass through the corresponding holes on the transition support plate respectively.

[0016] The above technical measures are based on the current situation that the front end plate of the box-type base is almost difficult to form 100% surface bonding on the side span tower wall of the main tower. A transition support plate with a smaller effective surface is supported between the front end plate of the box-type base and the side span tower wall of the main tower, and prestressed tensioning components are installed, thereby forming a gasket characteristic similar to that of a bolt connection between the front end plate of the box-type base and the side span tower wall of the main tower, so that the anchoring stress acting at each prestressed tensioning component installation point is more effectively diffused to avoid excessive local stress, thereby better protecting the concrete structure constituting the main tower.

[0017] Furthermore, the transition support plate is welded to the front end plate of the box-shaped base, forming a protruding structure from the front end plate. This technical measure can ensure that the transition support plate is firmly attached to the reaction frame while meeting the transition support requirements, which helps reduce the technical difficulty during on-site construction, especially eliminating the need for alignment and positioning between the transition support plate and the reaction frame.

[0018] As one of the preferred technical solutions, the box-shaped base has a front end plate and a rear end plate arranged at intervals, and multiple groups of base vertical ribs arranged side by side between the front end plate and the rear end plate along the horizontal width direction, and multiple groups of base transverse ribs arranged side by side between the front end plate and the rear end plate along the height direction;

[0019] The vertical ribs of the base are arranged at least at the location of the box-shaped base that is used to connect the corresponding reaction seats;

[0020] The base transverse ribs are arranged at least at the box-shaped base for connecting corresponding reaction seats and for forming perforations;

[0021] The through holes on the box-shaped base body for inserting the prestressed tensioning components are formed on the front end plate and the rear end plate between the two base body transverse ribs arranged in the upper and lower positions.

[0022] The box-type base structure of the above technical measures has high strength. While enhancing the overall structural strength of the reaction frame, it can form a highly reliable anchor seat for installing prestressed tensioning components with its own molding structure.

[0023] As one of the preferred technical solutions, there are multiple groups of through-holes on the box-type base body for installing prestressed tensioning components, and these through-holes are arranged symmetrically in the horizontal width direction of the box-type base body.

[0024] Furthermore, the through holes on the box-shaped base for inserting the prestressed tensioning components are partially arranged at the portion of the box-shaped base for connecting the reaction seat, and are within the coverage range of the corresponding reaction seat;

[0025] An operation hole corresponding to the covered perforation for external operation is provided on the vertical rib of the reaction seat.

[0026] The above technical measures can reliably guarantee the stability of the prestressed anchoring of the reaction frame on the main tower, thereby ensuring the reliability of the jacking reaction force support. As one of the preferred technical solutions, the reaction seat has a jacking end plate that is protruding and formed on the top of the rear end plate of the box-type base, multiple sets of seat body vertical ribs spaced side by side along the horizontal width direction at the rear end plate of the box-type base and the jacking end plate, and multiple sets of seat body transverse ribs spaced side by side along the height direction between the corresponding seat body vertical ribs and the jacking end plate and / or the rear end plate of the box-type base.

[0027] Furthermore, the reaction seat also has a sealing plate arranged at the rear end and / or bottom of the vertical ribs of the seat body and the transverse ribs of the seat body.

[0028] The reaction seat structure of the above technical measures has high strength, and while enhancing the overall structural strength of the reaction frame, it can reliably bear the thrust reaction force of a large moment.

[0029] As one of the preferred technical solutions, the prestressed tensioning assembly is a steel rod structure, a steel strand structure, or a finished cable structure. This technical measure helps to enhance the flexibility of the reaction frame anchoring installation on the main tower and is not limited to a specific prestressed tensioning structure.

[0030] The beneficial technical effect of the present invention is that the above-mentioned technical measures are aimed at the special characteristics of the separated structure of the reaction frame and the grid, and the fixation of the reaction frame on the main tower. The reaction frame is composed of a base of a box-type structure and a plurality of reaction seats integrally formed on the box-type base. The box-type base itself is used as an anchor seat for installing the prestressed tensioning component, and there is no need to form an anchor seat of an additional structure. Not only is the overall structural strength of the reaction frame high and the moment it can bear large, but the box-type base itself is used as an anchor seat to install the prestressed tensioning component, which can reliably diffuse the anchoring stress applied by the prestressed tensioning component to avoid excessive local stress. This is especially excellent with the cooperation of the transition support plate, so that it can bear greater tensioning force and is relatively friendly to the concrete structure constituting the main tower. Under the action of large tensioning force, the box-type base is not easy to cause damage to the concrete structure constituting the main tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a reference diagram of the usage status of the existing reaction frame used in cable saddle jacking construction.

[0032] Figure 2 A reference diagram of the use state of the utility model

[0033] Figure 3 for Figure 2 Top view of the coordination between the reaction frame and the grille.

[0034] Figure 4 for Figure 2 Enlarged view of the reaction frame in .

[0035] Figure 5 for Figure 4 Left view of .

[0036] Figure 6 for Figure 5 Half-section view (wherein the left half is a vertical section view at the box-type base, and the right half is a vertical section view at the reaction seat).

[0037] Figure 1 The meaning of the Chinese code: A—reaction frame; B—grille; C—corbel.

[0038] Figures 2 to 6 Meaning of the Chinese codes: 1—box-type base; 11—front end plate; 12—rear end plate; 13—vertical ribs of base; 14—transverse ribs of base; 15—perforation; 2—reaction seat; 21—sealing plate; 22—jacking end plate; 23—vertical ribs of base; 24—transverse ribs of base; 25—operating hole; 3—transition support plate; 4—main tower; 41—tensioning channel; 5—corbel; 6—grating; 7—prestressed tensioning component; 8—cable saddle. DETAILED DESCRIPTION

[0039] The present invention relates to a support structure for the saddle push construction of a suspension bridge, specifically a reaction frame for the saddle push construction. The main technical solution of the present invention is described in detail below with reference to a number of embodiments. Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 The technical solution of the present invention is clearly and in detail explained; although other embodiments are not separately drawn with drawings, their main structures can still refer to the drawings of embodiment 1.

[0040] It should be noted that the drawings of the present invention are schematic and have been simplified to clarify the technical objectives of the present invention, without necessarily obscuring the technical contribution of the present invention over the prior art. Furthermore, expressions such as "approximately" and "substantially" regarding quantities or fitting relationships below are intended to allow for reasonable assembly and processing errors within the industry, and do not literally represent absolute quantities or fitting relationships.

[0041] Example 1

[0042] See also Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the reaction frame of the present invention is a separate structure from the grid 6 embedded in the main tower 4. During the jacking construction of the cable saddle 8 supported by the grid 6, the reaction frame is fixed to the side span side tower wall of the main tower 4 via prestressed tensioning components 7. In conjunction with the grid 6 embedded in the main tower 4, the cable saddle 8 is pushed and displaced on the grid 6 using hydraulic jacks.

[0043] The reaction frame has a box-type base, namely a box-type base 1 and two groups of reaction seats 2.

[0044] Specifically, the box-type base 1 has a front end plate 11 and a rear end plate 12 arranged at intervals, as well as a plurality of groups of base vertical ribs 13 arranged side by side at intervals along the horizontal width direction between the front end plate 11 and the rear end plate 12, and a plurality of groups of base transverse ribs 14 arranged side by side at intervals along the height direction between the front end plate 11 and the rear end plate 12. Each group of base vertical ribs 13 can be a whole steel plate or multiple steel plates arranged in the same column; the vertical straight edges of each group of base vertical ribs 13 are vertically welded to the corresponding front end plate 11 and the rear end plate 12. Each group of base transverse ribs 14 can be a whole steel plate or multiple steel plates arranged in the same row; the four peripheral edges of each group of base transverse ribs 14 are vertically welded to the corresponding front end plate 11 and the rear end plate 12, and also to the adjacent base vertical ribs 13.

[0045] Thus, a box-type structure is formed by the front plate 11, the rear plate 12, and the multiple sets of base vertical ribs 13 and base transverse ribs 14 arranged therebetween. The base of this box-type structure—the box-type base 1—is provided with multiple sets of through-holes 15, each corresponding to each tensioning channel 41 on the main tower 4. Each set of through-holes 15 is formed on the front plate 11 and the rear plate 12 of the box-type base 1. To ensure the stability of the reaction frame's fixation and stress-bearing on the main tower 4, the multiple sets of through-holes 15 on the box-type base 1, used to receive the prestressed tensioning components 7, are arranged substantially symmetrically across the width of the box-type base 1.

[0046] In the molded structure of the aforementioned box-shaped base 1, to ensure the structural strength of the connection to the reaction seat 2, it is required that at least a portion of the multiple sets of base vertical ribs 13 be arranged on the box-shaped base 1 at locations connected to the corresponding reaction seat 2, and that at least a portion of the multiple sets of base transverse ribs 14 be arranged on the box-shaped base 1 at locations connected to the corresponding reaction seat 2 and at locations used for forming the through-holes 15. As an optimal choice, the arrangement positions of the various sets of base vertical ribs 13 and various sets of base transverse ribs 14 constituting the box-shaped base 1 between the front and rear end panels are preferably substantially bilaterally symmetrical along the transverse width of the front end panel 11 / rear end panel 12. To ensure that it can withstand large tensile moments, the through-holes 15 on the box-type base 1 for installing the prestressed tensioning components 7 are formed on the front end plate 11 and the rear end plate 12 between the two base transverse ribs 14 arranged in the upper and lower positions. The two base transverse ribs 14 arranged in the upper and lower positions of the through-hole 15 are arranged with a relatively small spacing, and are basically symmetrically arranged in the upper and lower positions with the axial direction of the through-hole 15 as the center.

[0047] The two groups of reaction seats 2 are connected side by side on the rear end plate 12 of the box-type base 1 along the horizontal width direction, basically forming a left-right symmetrical arrangement in the horizontal width direction of the box-type base 1. The two groups of reaction seats 2 are welded to the box-type base 1 to form an integral structure.

[0048] Each set of reaction seats 2 has a protruding push end plate 22 formed at the top of the rear end plate 12 of the above-mentioned box-type base 1, multiple sets of seat body vertical ribs 23 spaced side by side at the rear end plate 12 of the box-type base 1 and the push end plate 22 along the horizontal width direction, multiple sets of seat body transverse ribs 24 spaced side by side between the corresponding seat body vertical ribs 23 and the push end plate 22 and the rear end plate 12 of the box-type base 1 along the height direction, and a sealing plate 21 connected to the bottom and rear side of the seat body vertical ribs 23. Each set of seat body vertical ribs 23 can be a whole steel plate or multiple steel plates arranged in the same row; the front straight edge of each set of seat body vertical ribs 23 is respectively welded vertically to the rear end plate 12 and the push end plate 22 of the box-type base; the rear straight edge of each set of seat body vertical ribs 23 is respectively welded vertically to the sealing plate 21. Each set of transverse ribs 24 can be a single piece of steel plate or multiple plates arranged in a row. The perimeter of each set of transverse ribs 24 is vertically welded to the rear end plate 12 or the push end plate 22 of the box-shaped base 1, to the sealing plate 21, and to the adjacent vertical ribs 23. The sealing plate 21 at the bottom of the vertical ribs 23 is an inclined structure.

[0049] The two sets of reaction seats 2 of the above-mentioned structure are welded to the left and right sides of the rear end plate of the box-shaped base body 1. In the case where there are a large number of through-holes 15 on the box-shaped base body 1, some of the through-holes 15 on the box-shaped base body 1 are located at the portion of the box-shaped base body 1 used for connecting the reaction seats 2, that is, within the coverage area of ​​the corresponding reaction seats 2. Based on the molding structure of the above-mentioned reaction seat 2, in order to ensure the operability of the covered through-holes 15 when installing the prestressed tensioning assembly 7, an operation hole 25 is opened on the adjacent vertical rib 23 of the base body to allow external operation of the corresponding covered through-holes 15.

[0050] When the reaction frame of the above structure is fixed to the side span of the main tower 4, the front end plate 11 of the box-type base 1 is close to the side span side tower wall of the main tower 4. The through-holes 15 on the box-type base 1 form a one-to-one correspondence with the tensioning channels 41 on the main tower 4. The prestressed tensioning components 7 that pass through the corresponding tensioning channels 41 on the main tower 4 are anchored at the rear end plate 12 of the box-type base 1. The prestressed tensioning components 7 use a steel tension rod structure.

[0051] In order to further diffuse the anchoring stress of the prestressed tensioning assembly 7 on the reaction frame and avoid excessive local stress, when the reaction frame of the above-mentioned structure is fixed on the side span side of the main tower 4, a transition support plate 3 is provided between the front end plate 11 of the box-type base 1 and the side span side tower wall of the main tower 4. The supporting contact surface of the transition support plate 3 is smaller than the surface of the front end plate 11 of the box-type base 1, which is mainly reflected in that the height is smaller than the front end plate 11, but the length in the horizontal width direction is basically the same as the front end plate 11. The transition support plate 3 is provided with holes that match the groups of through-holes 15 on the box-type base 1. The transition support plate 3 is welded and fixed to the front end plate 11 of the box-type base 1, forming a protruding structure from the front end plate 11. The through-holes on the transition support plate 3 form a one-to-one corresponding relationship with the through-holes 15 on the box-type base 1 in the axial direction. Under the connection of the prestressed tensioning components 7 of the steel tie rod structure, one side surface of the transition support plate 3 abuts against the side span tower wall of the main tower 4, and the other side naturally abuts against the front end plate 11 of the box-type base 1 due to welding. The prestressed tensioning components 7 that pass through the corresponding tensioning channels 41 on the main tower 4 pass through the corresponding holes on the transition support plate 3 respectively, and are anchored at the rear end plate 12 of the box-type base 1. The bottom of the anchored reaction frame is located on the corbel 5 (i.e., the reaction support) embedded in the main tower 4.

[0052] Example 2

[0053] The rest of this embodiment is the same as that of embodiment 1, except that:

[0054] The prestressed tensioning components adopt steel strand structure.

[0055] Example 3

[0056] The rest of this embodiment is the same as that of embodiment 1, except that:

[0057] The prestressed tensioning components adopt finished cable structure.

[0058] Example 4

[0059] The rest of this embodiment is the same as that of embodiment 1, except that:

[0060] The transition support plate and the front end plate of the box-type base are separate structures, and the two are temporarily assembled through prestressed tensioning components during on-site installation.

[0061] Example 5

[0062] The rest of this embodiment is the same as that of embodiment 1, except that:

[0063] The transition support plate is removed, and when the reaction frame is anchored to the main tower, the front end plate of the box-type base directly fits the side span side tower wall of the main tower.

[0064] Example 6

[0065] The rest of this embodiment is the same as that of embodiment 1, except that:

[0066] The number of perforations on the box-shaped base is small, and the forming position avoids the reaction seat;

[0067] There is no need to provide an operating hole on the vertical rib of the reaction seat.

[0068] Example 7

[0069] The rest of this embodiment is the same as that of embodiment 1, except that:

[0070] Remove the cover plate from the rear and / or bottom side of the reaction seat.

[0071] Of course, this embodiment will also affect the structural strength of the reaction seat.

[0072] The above embodiments are only used to illustrate the present invention, rather than to limit it.

[0073] Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the above embodiments or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the present invention.

Claims

1. A reaction frame for cable saddle jacking construction, wherein the reaction frame and the grid (6) embedded on the main tower (4) are separate structures; When the cable saddle (8) supported by the grid (6) is pushed, the reaction frame is fixed to the side span of the main tower (4) through the prestressed tensioning assembly (7) and cooperates with the grid (6) pre-buried in the main tower (4); Its characteristics are: The reaction frame comprises a box-shaped base (1) and a plurality of reaction seats (2); the box-shaped base (1) is provided with a plurality of through holes (15) that are matched one by one with the tensioning channels (41) on the main tower (4); the reaction seats (2) are connected to the rear end plate (12) of the box-shaped base (1) in parallel at intervals, and form an integral structure with the box-shaped base (1); When the reaction frame is fixed on the side span of the main tower (4), the front end plate (11) of the box-type base (1) is close to the side span tower wall of the main tower (4), and the through holes (15) on the box-type base (1) form a one-to-one corresponding matching relationship with the tensioning channels (41) on the main tower (4), and the prestressed tensioning components (7) passing through the corresponding tensioning channels (41) on the main tower (4) are respectively anchored at the rear end plate (12) of the box-type base (1).

2. The reaction frame for cable saddle jacking construction according to claim 1, characterized in that: When the reaction frame is fixed on the side span side of the main tower (4), a transition support plate (3) is provided between the front end plate (11) of the box-shaped base (1) and the side span side tower wall of the main tower (4); The supporting contact surface of the transition support plate (3) is smaller than the surface of the front end plate (11) of the box-shaped base (1), and a hole matching the through hole (15) on the box-shaped base (1) is provided on the transition support plate (3); One side surface of the transition support plate (3) abuts against the side span tower wall of the main tower (4), and the other side abuts against the front end plate (11) of the box-type base (1), and each prestressed tensioning component (7) passing through the corresponding tensioning channel (41) on the main tower (4) passes through the corresponding hole on the transition support plate (3).

3. The reaction frame for cable saddle jacking construction according to claim 2, characterized in that: The transition support plate (3) is welded and fixed on the front end plate (11) of the box-shaped base (1), forming a protruding structure from the front end plate (11).

4. The reaction frame for cable saddle jacking construction according to claim 1, 2 or 3, characterized in that: The box-shaped base (1) comprises a front end plate (11) and a rear end plate (12) arranged at intervals, a plurality of groups of base vertical ribs (13) arranged side by side between the front end plate (11) and the rear end plate (12) along a transverse width direction, and a plurality of groups of base transverse ribs (14) arranged side by side between the front end plate (11) and the rear end plate (12) along a height direction. The base vertical ribs (13) are arranged at least at the box-shaped base (1) for connecting to the corresponding reaction seat (2); The base transverse ribs (14) are arranged at least at the box-shaped base (1) for connecting the corresponding reaction seats (2) and for forming the through holes (15); The perforations (15) on the box-shaped base (1) for inserting the prestressed tensioning assembly (7) are formed on the front end plate (11) and the rear end plate (12) between two base transverse rib plates (14) arranged in upper and lower positions.

5. The reaction frame for cable saddle jacking construction according to claim 1, characterized in that: The box-shaped base (1) has a plurality of groups of through-holes (15) for inserting the prestressed tensioning components (7), and these through-holes (15) are arranged in a left-right symmetrical manner in the transverse direction of the box-shaped base (1).

6. The reaction frame for cable saddle jacking construction according to claim 5, characterized in that: The through holes (15) on the box-shaped base (1) for inserting the prestressed tensioning assembly (7) are partially arranged at the portion of the box-shaped base (1) for connecting the reaction seat (2), and are within the coverage of the corresponding reaction seat (2); An operating hole (25) corresponding to the covered through hole (15) for external operation is provided on the vertical rib (23) of the seat body of the reaction seat (2).

7. The reaction frame for cable saddle jacking construction according to claim 1 or 6, characterized in that: The reaction seat (2) has a protruding push end plate (22) formed at the top of the rear end plate (12) of the box-type base (1), a plurality of sets of seat body vertical ribs (23) spaced side by side at the rear end plate (12) of the box-type base (1) and the push end plate (22) along the transverse width direction, and a plurality of sets of seat body transverse ribs (24) spaced side by side between the corresponding seat body vertical ribs (23) and the push end plate (22) and / or the rear end plate (12) of the box-type base (1) along the height direction.

8. The reaction frame for cable saddle jacking construction according to claim 7, characterized in that: The reaction seat (2) further comprises a sealing plate (21) arranged at the rear end and / or the bottom of the seat body vertical ribs (23) and the seat body transverse ribs (24).

9. The reaction frame for cable saddle jacking construction according to claim 1 or 2, characterized in that: The prestressed tensioning component (7) is a steel tie rod structure, a steel strand structure or a finished cable structure.

Images