Counter-force frame for cable saddle incremental launching construction

Abstract

The invention 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. The overall structural strength is high, the anchoring stress acted by the prestress tensioning assembly can be reliably diffused, the situation that local stress is too large is avoided, and the main tower is relatively friendly to a concrete structure forming the main tower.

Description

Technical Field

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

[0002] In the suspension bridge structure, the saddle supported on the main tower (or pier, the same below) is a key load-bearing component for supporting and steering the main cable. In order to ensure the reliable and long-term support of the saddle by the main tower, a steel structure grid is pre-embedded on the main tower. During the construction of the suspension bridge, in order to make the main tower supporting the main cable tend to be balanced with the change of the bridge assembly load, the saddle supported by the grid (usually the main saddle) needs to be pre-biased by a certain amount of travel on the side span side in the early stage. As the bridge assembly load changes, the saddle is pushed step by step on the grid toward the middle span side to adapt to the balance of the force on the main cable on the side span side and the middle span side, so as to prevent the main tower from bending toward the middle span side in the later stage of bridge construction or after completion, which exceeds the design technical requirements. The industry calls the step-by-step displacement process of the saddle on the grid from the side span side to the middle span side as jacking construction, or jacking operation.

[0003] In order to meet the requirements of the jacking construction of the cable saddle on the grid, a reaction frame for jacking support 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 end of the side span of the grid B. The lower part of the reaction frame A is formed by protruding downward from the bottom of the grid B and is used to be seated on the side wall of the main tower side span (i.e., the reaction support, the same below). The upper part of the reaction frame A is formed by protruding upward from the top of the grid B and is used to arrange the hydraulic jack for pushing the cable saddle. Figure 1 It can be seen from the combined structure of the reaction frame and the grille that the reaction frame is actually composed of three integrated parts, one part is the horizontal extension of the side span side end of the box-type structure grille from the side span side tower wall of the main tower, one part is the support structure protruding upward at the top of the side span side extension end of the grille, and the other part is the support structure protruding downward at the bottom of the side span side extension end of the grille. For this kind of grille with a reaction frame, after the jacking construction of the saddle is completed, the reaction frame part of the grille (that is, the part of the grille extending from the main tower on the side span side) needs to be cut and removed along the edge of the main tower. In other words, the reaction frame on the grille is not a permanent structure, but only a phased 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 forming of the reaction frame on the grille further increases the structural volume and weight of the grille. This brings technical difficulties to 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, such as the Chinese patent document named "Prestressed jacking structure of main cable saddle of 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. The technology of separating the reaction frame from the grille is that during construction, the grille is first pre-buried at the top of the main tower, and a tensioning channel is formed on the main tower below the grille. The reaction frame is then fixed through the prestressed tensioning components installed in the tensioning channel, so that the reaction frame matches the grille pre-buried in the main tower. The reaction frame and the grille are formed separately, which greatly reduces the forming structure of the grille, which is not only conducive to reducing the technical difficulty of manufacturing and transporting the grille and the reaction frame, but also helps to reduce the technical difficulty of removing the reaction frame from the main tower after the top-pushing construction is completed. It can even make the reaction frame a universal component and match different grilles multiple times in different construction environments (of course, the matching of the grilles in different construction environments should be considered), with 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 a 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 assembly, an anchor seat is also welded at the position of the forming perforation on the rear side of the end plate, and 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 the grid on the main tower, a 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 bond 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 force relatively limited and is also easy to cause damage to the concrete structure constituting the main tower.

[0006] Therefore, the reaction frame forming structure that forms a separate structure with the grille needs to be improved. Summary of the invention

[0007] The technical purpose of the present invention is to provide a reaction frame for cable saddle jacking construction that can diffuse the anchoring stress applied 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 deficiencies of the prior art.

[0008] The technical purpose of the present invention is achieved by the following technical solution: a reaction frame for cable saddle jacking construction, wherein the reaction frame and the grid embedded on the main tower are separate structures; 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; The reaction frame has a box-shaped base and multiple groups of reaction seats. The box-shaped base is provided with multiple groups of through holes that match the tensioning channels on the main tower. The reaction seats are connected side by side at intervals on the rear end plate of the box-shaped base and form an integral structure with the box-shaped base. 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 passing through the corresponding tensioning channels on the main tower are anchored at the rear end plate of the box-type base respectively.

[0009] The above technical measures are aimed at the separate structure of the reaction frame and the grid, and the particularity of fixing 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 anchor seat of an additional structure. Not only does the overall structural strength of the reaction frame have high strength and can bear a large moment, but the box-type base itself is used as an anchor seat to install the prestressed tensioning component, which can reliably diffuse the anchor stress applied by the prestressed tensioning component to avoid excessive local stress, thereby being able to bear a larger tensioning force. It 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.

[0010] 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; The supporting contact surface of the transition support plate is smaller than the front end plate surface of the box-shaped base, and holes matching the through holes on the box-shaped base are formed on the transition support plate; 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 passing through the corresponding tensioning channels on the main tower respectively pass through the corresponding holes on the transition support plate.

[0011] The above technical measures are based on the current situation that it is almost impossible for the front end plate of the box-type base to form 100% surface bonding on the side span walls 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 walls 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 walls of the main tower, so that the anchoring stress acting at each prestressed tensioning component installation location is more effectively diffused to avoid excessive local stress, thereby providing better protection for the concrete structure constituting the main tower.

[0012] Furthermore, the transition support plate is welded and fixed to the front end plate of the box-shaped base, and a protruding structure is formed from the front end plate. This technical measure can make the transition support plate firmly combined with the reaction frame under the premise of satisfying the transition support, which is conducive to reducing the technical difficulty during on-site construction, especially eliminating the alignment and positioning operations between the transition support plate and the reaction frame.

[0013] 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 at intervals 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 at intervals along the height direction; The vertical ribs of the base are arranged at least at the place where the box-shaped base is used to connect the corresponding reaction seat; The base transverse ribs are arranged at least at the box-shaped base for connecting the corresponding reaction seats and for forming the perforations; 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 two base transverse rib plates arranged in upper and lower positions.

[0014] 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 high-reliability anchor seat for installing prestressed tensioning components with its own molding structure.

[0015] As one of the preferred technical solutions, the box-type base body has multiple groups of through holes for inserting the prestressed tensioning components, and these through holes are arranged symmetrically in the horizontal width direction of the box-type base body.

[0016] Furthermore, the through holes on the box-shaped base body for inserting the prestressed tensioning components are partially arranged at the part of the box-shaped base body for connecting the reaction seat, and are within the coverage range of the corresponding reaction seat; An operation hole corresponding to the covered perforation is provided on the vertical rib plate of the reaction seat for external operation.

[0017] The above technical measures can reliably guarantee the stability of the prestressed anchoring of the reaction frame on the main tower, so as to ensure the reliability of the jacking reaction force support. As one of the preferred technical solutions, the reaction seat has a jacking end plate protruding at the top of the rear end plate of the box-type base, multiple groups of seat body vertical ribs arranged side by side at intervals at the rear end plate of the box-type base and the jacking end plate along the horizontal width direction, and multiple groups of seat body transverse ribs arranged side by side at intervals between the corresponding seat body vertical ribs and the jacking end plate and / or the rear end plate of the box-type base along the height direction.

[0018] Furthermore, the reaction seat also has a sealing plate arranged at the rear end and / or the bottom of the vertical ribs of the seat body and the transverse ribs of the seat body.

[0019] 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.

[0020] 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 is conducive to enhancing the flexibility of anchoring and installing the reaction frame on the main tower, and is not limited to a specific prestressed tensioning structure.

[0021] The beneficial technical effect of the present invention is as follows: the above-mentioned technical measures are aimed at the separate structure of the reaction frame and the grid, and the particularity of fixing the reaction frame on the main tower. The reaction frame is composed of a base body of a box-type structure and a plurality of groups of reaction seats integrally formed on the box-type base body. The box-type base body itself is used as an anchor seat for wearing 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 is large, but also the box-type base body itself is used as an anchor seat to wear the prestressed tensioning component, which can reliably diffuse the anchor 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 a larger 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 body is not easy to cause damage to the concrete structure constituting the main tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a reference diagram of the usage status of the existing reaction frame used in the saddle jacking construction.

[0023] Figure 2 A reference diagram of a use state of the present invention Figure 3 for Figure 2 A top view of the coordination between the reaction frame and the grille.

[0024] Figure 4 for Figure 2 Enlarged view of the reaction frame in .

[0025] Figure 5 for Figure 4 Left view of .

[0026] Figure 6 for Figure 5 Half-section view (where 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).

[0027] Figure 1 The meaning of the Chinese codes: A—reaction frame; B—grille; C—corbel.

[0028] Figures 2 to 6 Meaning of the 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—thrust 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 assembly; 8—cable saddle. DETAILED DESCRIPTION

[0029] The present invention relates to a support structure for cable saddle jacking construction of a suspension bridge, specifically a reaction frame for cable saddle jacking construction. The main technical solution of the present invention is specifically described below in combination with multiple embodiments. Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The technical solution of the present invention is explained clearly and in detail; although other embodiments are not separately drawn with drawings, their main structures can still refer to the drawings of embodiment 1.

[0030] It should be noted that the drawings of the present invention are schematic, and unnecessary details have been simplified to clarify the technical purpose of the present invention, so as to avoid blurring the technical solution of the present invention that contributes to the prior art. In addition, the expressions "approximately", "substantially" and the like regarding quantity or matching relationship in the following text mean that reasonable assembly errors and processing errors in the industry are allowed to exist, and do not literally express absolute quantities or matching relationships.

[0031] Example 1 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. When the cable saddle 8 supported by the grid 6 is pushed, the reaction frame is fixed to the side span tower wall of the main tower 4 through the prestressed tensioning assembly 7, and cooperates with the grid 6 embedded in the main tower 4, and the cable saddle 8 is pushed and displaced on the grid 6 by the hydraulic jack.

[0032] The reaction frame has a box-shaped base, namely a box-shaped base 1 and two groups of reaction seats 2.

[0033] Specifically, the box-type base 1 has a front end plate 11 and a rear end plate 12 arranged at intervals, and multiple groups of base vertical ribs 13 arranged side by side between the front end plate 11 and the rear end plate 12 at intervals along the horizontal width direction, and multiple groups of base transverse ribs 14 arranged side by side between the front end plate 11 and the rear end plate 12 at intervals along the height direction. Among them, each group of base vertical ribs 13 can be a whole steel plate, or multiple steel plates arranged in the same row; the vertical straight edges on both sides of each group of base vertical ribs 13 are vertically welded with 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 with the corresponding front end plate 11 and the rear end plate 12, and also vertically welded with the adjacent base vertical ribs 13.

[0034] In this way, a box-type structure is formed by the front plate 11, the rear plate 12, and the multiple groups of base vertical ribs 13 and multiple groups of base transverse ribs 14 arranged therebetween. On the base of the box-type structure, i.e., the box-type base 1, multiple groups of through holes 15 are provided, which are matched one by one with each tensioning channel 41 on the main tower 4, and each group of through holes 15 is formed on the front plate 11 and the rear plate 12 of the box-type base 1. In order to ensure the stability of the fixing and stressing of the reaction frame on the main tower 4, the multiple groups of through holes 15 on the box-type base 1 for inserting the prestressed tensioning components 7 are basically arranged symmetrically in the horizontal width direction of the box-type base 1.

[0035] In the molding structure of the above-mentioned box-type base 1, in order to ensure the connection structural strength of the reaction seat 2, it is required that part of the multiple groups of base vertical ribs 13 should be arranged at least at the box-type base 1 used for connecting the corresponding reaction seat 2, and it is required that part of the multiple groups of base transverse ribs 14 should be arranged at least at the box-type base 1 used for connecting the corresponding reaction seat 2 and at the molding perforations 15. As the best choice, the arrangement positions of the groups of base vertical ribs 13 and the groups of base transverse ribs 14 constituting the box-type base 1 between the front and rear end plates are preferably basically formed in a left-right symmetrical arrangement along the horizontal width direction of the front end plate 11 / the rear end plate 12. To ensure that it can withstand large tensioning 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 holes 15 are arranged at a relatively small interval, and are basically symmetrically arranged in the upper and lower positions with the axial direction of the through holes 15 as the center.

[0036] 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.

[0037] Each group of reaction seats 2 has a protruding push end plate 22 formed at the top of the rear end plate 12 of the box-type base 1, multiple groups of seat body vertical ribs 23 arranged side by side at intervals at the rear end plate 12 of the box-type base 1 and the push end plate 22 along the horizontal width direction, multiple groups of seat body transverse ribs 24 arranged side by side at intervals 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. Among them, each group of seat body vertical ribs 23 can be a whole steel plate or multiple steel plates arranged in the same row; the front straight edges of each group of seat body vertical ribs 23 are respectively vertically welded with the rear end plate 12 and the push end plate 22 of the box-type base; the rear straight edges of each group of seat body vertical ribs 23 are respectively vertically welded with the sealing plate 21. Each set of transverse ribs 24 of the seat body can be a whole steel plate or multiple steel plates arranged in the same row; the four edges of each set of transverse ribs 24 of the seat body are vertically welded with the rear end plate 12 or the top push end plate 22 of the box-shaped base 1, vertically welded with the sealing plate 21, and also vertically welded with the adjacent vertical ribs 23 of the seat body. The sealing plate 21 at the bottom of the vertical ribs 23 of the seat body is an inclined structure.

[0038] The two groups of reaction seats 2 of the above structure are welded on the left and right sides of the rear end plate of the box-type base 1 of the above structure. In the case where there are many through holes 15 on the box-type base 1, some of the through holes 15 on the box-type base 1 are located at the part of the box-type base 1 used for connecting the reaction seats 2, that is, they are located within the coverage range of the corresponding reaction seats 2. Based on the molding structure of the above reaction seat 2, in order to ensure the operability of the covered through holes 15 when the prestressed tensioning assembly 7 is installed, an operation hole 25 for external operation of the corresponding covered through holes 15 is opened on the adjacent seat body vertical rib plate 23.

[0039] When the reaction frame of the above structure is fixed on the side span side 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, and each through hole 15 on the box-type base 1 forms a one-to-one matching relationship with each tensioning channel 41 on the main tower 4, and each prestressed tensioning component 7 passing through the corresponding tensioning channel 41 on the main tower 4 is anchored at the rear end plate 12 of the box-type base 1. The prestressed tensioning component 7 adopts a steel tension rod structure.

[0040] 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 structure is fixed on the side span side of the main tower 4, a transition support plate 3 is arranged 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 matching the groups of through holes 15 on the box-type base 1. The transition support plate 3 is welded and fixed on the front end plate 11 of the box-type base 1, and a protruding structure is formed from the front end plate 11. The through holes on the transition support plate 3 and the through holes 15 on the box-type base 1 form a one-to-one matching relationship 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.

[0041] Example 2 The other contents of this embodiment are the same as those of Embodiment 1, except that: The prestressed tensioning components adopt steel strand structure.

[0042] Example 3 The other contents of this embodiment are the same as those of Embodiment 1, except that: The prestressed tensioning components adopt the finished cable structure.

[0043] Example 4 The other contents of this embodiment are the same as those of Embodiment 1, except that: The transition support plate and the front end plate of the box-type base are separate structures, and the two are temporarily assembled via prestressed tensioning components during on-site installation.

[0044] Example 5 The other contents of this embodiment are the same as those of Embodiment 1, except that: 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.

[0045] Example 6 The other contents of this embodiment are the same as those of Embodiment 1, except that: The number of perforations on the box-shaped base is small, and the forming position avoids the reaction seat; There is no need to open an operation hole on the vertical rib plate of the reaction seat.

[0046] Example 7 The other contents of this embodiment are the same as those of Embodiment 1, except that: Remove the cover plate from the rear and / or bottom side of the reaction seat.

[0047] Of course, this embodiment will also affect the structural strength of the reaction seat.

[0048] The above embodiments are only used to illustrate the present invention, but not to limit it.

[0049] 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 substitutions for some of the technical features therein; and these modifications or substitutions 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, the reaction frame and a grid (6) pre-buried on a main tower (4) being a separate structure; When the cable saddle (8) supported by the grid (6) is pushed forward, 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); Features: 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) which are matched one by one with the tensioning channels (41) on the main tower (4); the reaction seats (2) are connected side by side at intervals on the rear end plate (12) of the box-shaped base (1) and form an integral structure with the box-shaped base (1); When the reaction frame 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 tower wall of the main tower (4), and the through holes (15) on the box-type base (1) form a one-to-one 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 assembly (7) passing through the corresponding tensioning channel (41) on the main tower (4) passes through the corresponding holes 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), and a protruding structure is formed on 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, and a plurality of groups of base vertical ribs (13) arranged 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 at intervals along the height direction between the front end plate (11) and the rear end plate (12); 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 seat (2) and at the forming through holes (15); The through holes (15) on the box-shaped base (1) for inserting the prestressed tensioning components (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 the 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 components (7) are partially arranged at the portion of the box-shaped base (1) for connecting the reaction seat (2) and are within the coverage range of the corresponding reaction seat (2); An operating hole (25) corresponding to the covered through hole (15) for external operation is provided on the seat body vertical rib plate (23) 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) comprises a push end plate (22) protrudingly formed at the top of the rear end plate (12) of the box-shaped base (1), a plurality of groups of seat body vertical ribs (23) spaced apart and arranged side by side along the transverse width direction at the rear end plate (12) of the box-shaped base (1) and the push end plate (22), and a plurality of groups of seat body transverse ribs (24) spaced apart and arranged side by side along the height direction between corresponding seat body vertical ribs (23) and the push end plate (22) and / or the rear end plate (12) of the box-shaped base (1).

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 rib plate (23) and the seat body transverse rib plate (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.

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