Anchor pressure-resistant and wear-reducing cable saddle and cable strand anchoring method

Abstract

The present invention discloses a method for anchoring a pressure-resistant and wear-reducing cable saddle and a cable strand, the device comprising: a saddle body providing support for the entire cable saddle, the saddle body comprising a base arranged at the bottom, a plurality of longitudinal ribs arranged on the base, and transverse ribs arranged between the plurality of longitudinal ribs; a saddle head arranged on the saddle body, the saddle head comprising a saddle groove arranged on the saddle body and a partition arranged in the saddle groove; an anchoring piece arranged on the saddle head, the anchoring piece comprising a steel bracket arranged on the side wall of the saddle groove and an anchor head arranged at one end of the steel bracket. Part of the cable strands are disconnected at the top of the cable saddle groove and cross-anchored to the anchor beam on the opposite side, which increases the force transmission path of the cable strands, and turns the side wall of the saddle groove into a direct load-bearing component of the cable force, so that the force of the cable saddle is more uniform, which is beneficial to reducing the unbalanced force of the main cables on both sides of the cable saddle, and can improve the nominal friction coefficient and anti-slip safety factor of the main cable, thereby improving the anti-slip stability performance between the cable saddles.

Description

Technical Field

[0001] The invention belongs to the technical field of main cable erection of suspension bridges, and more specifically, relates to a cable saddle with pressure resistance and wear reduction for anchoring and a cable strand anchoring method. Background Art

[0002] In the design of long-span bridges, suspension bridges are widely adopted due to their simple structure, clear force, low unit cost, and beautiful appearance. In general, a suspension bridge is supported and turned by two parallel or nearly parallel main cables on the main tower to bear the dynamic and static loads of the bridge. When the main cable anchorage space is limited, there are other technical requirements for bridge stiffness, and the overall landscape design requirements of the bridge are encountered in the construction of the suspension bridge, the main cables on both sides of the saddle will produce unbalanced forces, and the saddle will slip due to the force difference. And it will cause the outer groove wall of the main cable saddle groove to bear a huge force, which is especially prominent when the arc-shaped turning angle of the main cable of the suspension bridge in the lateral direction (i.e., the width direction of the suspension bridge) is large, which will pose a higher technical challenge to the force strength and force stability of the main cable saddle.

[0003] The commonly used technical means on the market at present is to arrange two saddle heads with two-dimensional saddle grooves on the same base at a specific angle. Each saddle head can support and guide the main cable in the three dimensions of length, height and width of the suspension bridge by using the bottom as the main force-bearing surface. The Chinese patent with publication number CN110029578A discloses a main cable saddle for a space cable suspension bridge, including a saddle head 1 and a saddle head 2 arranged on the same base, and the saddle head 1 has a saddle groove 1 with a concave structure and a curved bottom along the length direction of the saddle head 1, which is used to support the main cable, and the saddle head 2 has a saddle groove 2 with a concave structure and a curved bottom along the length direction of the saddle head 2, which is used to support the main cable, and the upper extension line of the width center line of the saddle groove 1 and the upper extension line of the width center line of the saddle groove 2 form an acute angle.

[0004] The Chinese patent with publication number CN110029578A can support and guide the main cable in the three dimensions of length, height and width of the suspension bridge, and has good force strength and force stability. However, the device only adds one dimension of arrangement and steering in the width direction of the bridge, and does not fundamentally change the force on the saddle. It does not make too many changes in the pressure condition of the device, and still cannot cope with higher pressure and reduce lateral displacement. Therefore, there is an urgent need for a pressure-resistant saddle to solve the problem of slippage of the main cable due to unbalanced force. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a method for anchoring a pressure-resistant and wear-reducing cable saddle and a cable strand, by adding a steel anchor beam to the side wall of the saddle groove, replacing part of the cable strands with a pair of back cables, and cross-anchoring them to the anchor beam on the opposite side. Compared with the traditional cable saddle structure, the pair of anchored cable saddles increases the force transmission path of the cable strands, and turns the side wall of the saddle groove into a direct load-bearing component of the cable force, so that the force on the saddle is more uniform, which is beneficial to reducing the unbalanced force of the main cable on both sides of the saddle, and can increase the nominal friction coefficient and anti-skid safety factor of the main cable, thereby improving the anti-skid stability performance between the cable saddles; at the same time, a sliding friction pair of a slide plate with excellent pressure resistance and a modified polyformaldehyde wear-reducing layer is arranged between the upper and lower bearing plates, which can improve work efficiency and structural reliability during jacking construction.

[0006] To achieve the above-mentioned purpose, an embodiment of the present invention provides a cable saddle for anchor pressure resistance and wear reduction, characterized in that it comprises:

[0007] A saddle body providing support for the entire saddle, the saddle body comprising a base disposed at the bottom, a plurality of longitudinal ribs disposed on the base, and transverse ribs disposed between the plurality of longitudinal ribs;

[0008] A saddle head disposed on the saddle body, the saddle head comprising a saddle groove disposed on the saddle body and a partition disposed in the saddle groove;

[0009] An anchor piece is arranged on the saddle head, and the anchor piece includes a steel corbel arranged on the side wall of the saddle groove and an anchor head arranged at one end of the steel corbel. The saddle body is provided with two symmetrical grooves. The saddle head and the anchor piece are arranged in pairs on the saddle body and are symmetrically distributed in the grooves to withstand the tension of the suspension cable or the inclined cable, increase the force transmission path of the cable strand, and make the force on the cable saddle more uniform.

[0010] Further, the anchor head comprises:

[0011] an anchor beam provided at one end of the steel corbel;

[0012] And the anchor holes are arranged on the anchor beam, part of the strands in the main cable are replaced by paired back cables, which are cross-anchored on the anchor beam on the opposite side.

[0013] Furthermore, a reinforcing rib is provided between the anchor beam and the anchor head bottom plate, and a connecting plate is provided at one end;

[0014] The other end of the anchor beam is provided with a vertical plate, and a hole is opened on the plate to form an anchor hole.

[0015] Furthermore, the upper end of the steel corbel is a flat edge, and the bottom is an arc edge with the same arc as the saddle groove, and is fixed thereto as a whole.

[0016] Furthermore, the pommel also includes:

[0017] a pressure plate disposed on the partition;

[0018] And a transverse steel pull rod arranged on the saddle groove.

[0019] Furthermore, an adjustment plate is provided on the bottom plate of the pressure plate, and both ends of the adjustment plate are inclined surfaces, and adjustment blocks are provided on the inclined surfaces, and the adjustment blocks are connected by long bolts.

[0020] Furthermore, a notch is provided on the adjusting block of the pressure plate, and the transverse steel pull rod is pressed into the notch of the adjusting block.

[0021] Furthermore, it also includes a load-bearing plate arranged at the bottom of the base, and the load-bearing plate includes:

[0022] An upper bearing plate disposed at the bottom of the base;

[0023] and the lower deck located on the top of the bridge tower.

[0024] Furthermore, the upper bearing plate and the lower bearing plate are both provided with a wear-reducing plate with modified polyformaldehyde, forming a friction pair with each other.

[0025] According to a second aspect of an embodiment of the present invention, there is provided a cable strand anchoring method, comprising the following steps:

[0026] S100, fixing the lower deck to the position to be installed on the top of the bridge tower, fixing the upper deck to the bottom plate of the base, and transporting the two halves of the saddle with the upper deck fixed to the hanging position below the bridge tower;

[0027] S200. Use a crane to lift the cable saddles onto the top of the bridge tower in turn, push the cable saddles to the designed installation position using the friction pair composed of modified polyoxymethylene wear-reducing plates, fix the two halves of the cable saddle into a whole with bolts, and fix them at the designed position using the fixing seat on the saddle body;

[0028] S300, replace some strands in the main cable with paired back cables, and after the main cable is hoisted in the saddle groove, anchor both ends to the ground, and the anchor heads are bolted to both ends of the steel brackets. Then, hoist eight back cables to the installation position, install them oppositely on the saddle groove, and fix the ends in the opposite anchor holes. After completion, anchor the other end to the ground;

[0029] S400, fine-tune the position of each main cable in the saddle groove. After reaching the optimal position, install the pressure plate according to the site conditions and fix it with the transverse steel tie rod. After all the pressure plates are installed, install other transverse steel tie rods. Adjust the tightness between the main cables to the optimal state through the nuts on the pressure plate and at both ends of the steel tie rod.

[0030] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0031] 1. The present invention provides a pair of anchored pressure-resistant and wear-reducing saddles and a cable strand anchoring method, which adds a steel anchor beam to the side wall of the saddle groove, replaces part of the cable strands with a pair of back cables, and cross-anchors them to the anchor beams on the opposite side. Compared with the traditional saddle structure, the pair of anchored saddles increases the force transmission path of the cable strands, and turns the side wall of the saddle groove into a direct load-bearing component of the cable force, so that the force on the saddle is more uniform, which is beneficial to reducing the unbalanced force of the main cables on both sides of the saddle, and can improve the nominal friction coefficient and anti-skid safety factor of the main cable, thereby improving the anti-skid stability performance between the cable saddles.

[0032] 2. The present invention provides a method for anchoring a pressure-resistant and wear-reducing cable saddle and cable strand, wherein a multi-layer partition is arranged in the middle of the saddle groove to separate the main cables installed between the saddle grooves, thereby increasing the friction between the main cable and the saddle groove, bearing the tension and pressure transmitted by the main cable, ensuring the safety and stability of the bridge, avoiding sliding, displacement or deformation when bearing tension, maintaining the stability of the main cable, and facilitating maintenance and inspection, thereby ensuring the safety and efficiency of construction and maintenance, and enhancing the rigidity of the saddle groove, making it less likely to deform when bearing pressure, thereby improving the rigidity of the entire system.

[0033] 3. The present invention provides a method for anchoring a pressure-resistant and wear-reducing cable saddle and cable strand, wherein a pressure plate is arranged between the partition and the transverse steel tie rod, and the height of the adjustment block on the adjustment plate is changed by adjusting the adjustment bolt on the pressure plate, thereby adjusting the compression degree of the main cable in the partition, and together with the transverse steel tie rod, adjusting the stress condition of the main cable, thereby ensuring the safety and stability of the bridge and avoiding sliding, displacement or deformation when subjected to tension.

[0034] 4. The present invention provides a method for anchoring a pressure-resistant and wear-reducing cable saddle and cable strand. A sliding friction pair with a modified polyformaldehyde wear-reducing layer and excellent pressure resistance is set between the upper and lower bearing plates, so that the cable saddle can be easily moved to the designed position on the bridge tower for installation without causing damage to other parts of the device. The friction of the cable saddle during installation and position adjustment is effectively reduced, so that the cable saddle can be smoothly transported to the predetermined position, the operating efficiency of the cable saddle installation is improved, the probability of cable saddle wear during installation is reduced, and the cable saddle is avoided from being transported on the bridge tower, thus ensuring the safety of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the overall structure of a pressure-resistant and wear-reducing cable saddle for anchors according to an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of a saddle body structure of a cable saddle for anchor pressure resistance and wear reduction according to an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the structure of a saddle head and an anchoring piece of a cable saddle for anchor pressure resistance and wear reduction according to an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of a pressure plate structure for an anchor pressure-resistant and wear-reducing saddle according to an embodiment of the present invention;

[0039] Figure 5 A schematic diagram comparing the stress conditions of an anchor pressure-resistant and wear-reducing saddle and a traditional saddle according to an embodiment of the present invention;

[0040] Figure 6 The figure is a schematic diagram of specific steps of a cable strand anchoring method according to an embodiment of the present invention.

[0041] In all the drawings, the same figure numbers represent the same technical features, specifically: 1-saddle body, 11-base, 12-longitudinal rib, 13-transverse rib, 2-saddle head, 21-saddle groove, 22-partition, 23-pressure plate, 24-transverse steel tie rod, 3-anchor, 31-steel corbel, 32-anchor head, 321-anchor beam, 322-anchor hole, 4-load-bearing plate, 41-lower bearing plate, 42-upper bearing plate. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] like Figure 1 As shown, an embodiment of the present invention provides a cable saddle for anchor pressure resistance and wear reduction, comprising a saddle body 1 that provides support for the entire cable saddle, a saddle head 2 disposed on the saddle body 1, an anchor 3 disposed on the saddle head 2, and a load-bearing plate 4 disposed between the bottom of the saddle body 1 and the top of the bridge tower. A design of using double saddle heads in parallel on the basis of a conventional single saddle head can better withstand the tension of a suspension cable or a cable-stayed cable, avoid problems such as damage or breakage that may occur in a single saddle head design, thereby improving the safety of a bridge or cable-stayed cable structure, providing better support and stability, and making the cable saddle more firmly fixed on the top of the tower, thereby reducing vibration and shaking caused by factors such as wind, and adapting to suspension cables or cable-stayed cables of different diameters and specifications, thereby facilitating the construction and maintenance of a bridge or cable-stayed cable structure. A new anchor 3 is added to the saddle head 2, and part of the cable strands are replaced by a pair of back cables, which are cross-anchored on the anchor beam on the opposite side. Compared with the traditional saddle structure, the pair of anchor saddles increases the force transmission path of the cable strands, and turns the side walls of the saddle groove into direct load-bearing components of the cable force, so that the force on the saddle is more uniform, which is beneficial to reducing the unbalanced force of the main cables on both sides of the saddle, and can increase the nominal friction coefficient and anti-skid safety factor of the main cable, thereby improving the anti-skid stability performance between the cable and the saddle groove 21.

[0044] The saddle body 1 includes a base 11 arranged at the bottom, longitudinal ribs 12 fixed on the base 11, and transverse ribs 13 installed between the longitudinal ribs 12 to strengthen the fixation thereof. The bottom of the base 11 is a square plate structure, and a plurality of vertical plates are arranged on the square bottom plate. The vertical plates are formed by opening a door-shaped hole at the bottom edge of the trapezoidal plate, and a piece of special-shaped plate is symmetrically cut off at the two top corners. The vertical plates are arranged in parallel from one edge of the bottom plate to the other edge and increase step by step. The position of the special-shaped plate cutting also increases accordingly, and a plurality of holes are opened on the top of the highest vertical plate. An inclined plate is arranged on both sides of the parallel vertical plates. The inclination of the inclined plate is the same as that of the bevel of the vertical plate, and the top is slightly higher than the bevel cut-off part of the vertical plate. The top of the inclined plate is an arc surface, which smoothly transitions between the vertical plates. The longitudinal ribs 12 are fixed on both sides of the vertical plates of the base 11, and the two sandwich the inclined plates of the base 11 in the middle, and the same special-shaped plates are cut out on the longitudinal ribs 12 with the center line of the inclined plates as the axis of symmetry to form a groove together. The height of the longitudinal ribs 12 changes with the height of the vertical plates of the base 11. The transverse ribs 13 are a layer, fixed in the gap between the longitudinal ribs 12 and the inclined plates of the base 11, and strengthen the connection strength between the base 11 and the longitudinal ribs 12. A fixing seat is set on the side of the longitudinal ribs 12, which is used to fix the cable saddle when it is installed on the bridge tower to prevent it from sliding due to external forces during later use and causing damage to the bridge. The rigidity and strength of the saddle are increased, making the saddle more stable and reliable when subjected to tension, providing additional support and stability, keeping the saddle stable under various environmental conditions, reducing vibration and deformation, reducing the wear and fatigue of the saddle during long-term use, extending its service life, making the saddle better resist the influence of wind, reducing wind vibration and wind-induced displacement, improving the wind resistance of bridges or cable-suspended structures, making the saddle more convenient and flexible during manufacturing, transportation, installation and maintenance, and improving construction efficiency and maintenance convenience.

[0045] The saddle head 2 includes a saddle groove 21 fixed in the groove formed by the vertical plate of the bottom plate 11 and the longitudinal rib 12, a partition 22 fixed in the saddle groove 21, a pressure plate 23 provided on the partition 22 for fixing and pressing it, and a transverse steel pull rod 24 fixed on the saddle groove 21. The saddle groove 21 is an arc columnar structure with the same curvature as the vertical plate of the base 11, and the bottom is the same shape as the groove formed by the vertical plate of the bottom plate 11 and the longitudinal rib 12. The top is opened with a deep groove downward, and the bottom of the groove is a stepped arrangement with the middle low and the two sides high, and a small groove is opened along the corner edge at the bottom corner of each step. A lifting ear is fixed on the outer side of the saddle groove 21, and through holes are symmetrically opened on both sides along the top edge. The partition 22 is an arc ring plate with the same curvature as the saddle groove 21. The partition 22 is a plurality of arc ring plates, which are fixed in parallel to each other in the small groove in the saddle groove 21, and are used to separate multiple steel cables installed at the same time to reduce the friction between the steel cables. The bottom of the pressure plate 23 is a rectangular bottom plate, which contacts the top surface of the partition plate 22. An adjustment plate is fixed on the rectangular bottom plate. The two ends of the adjustment plate are inclined surfaces, and an adjustment block is provided on each inclined surface to slide along the inclined surface. The top of the adjustment block has an arc-shaped notch, and through holes are provided at both ends. The adjustment blocks on the two inclined surfaces are connected together by slender bolts, and the distance between the two adjustment blocks is adjusted by bolts. A support pier is fixed at the bottom of the saddle groove 21, and its shape is the same as its bottom profile, and its width is the same as the width of the vertical plate of the bottom plate 11. After being welded to the saddle groove 21 as a whole, it is fixed to the vertical plate of the bottom plate 11. The transverse steel tie rod 24 is a slender round rod structure, with threads at both ends, installed in the edge hole on the saddle groove 21, fixed with a nut, and the distance between the two side walls of the saddle groove 21 can be adjusted by the nut to clamp the cable strand in the middle. The pressure plate 23 is arranged between the transverse steel tie rod 24 and the partition 22. The transverse steel tie rod 24 is pressed into the arc-shaped notch on the adjustment block of the pressure plate 23. When the distance between the adjustment blocks is adjusted, the position of the adjustment block on the adjustment plate will become higher. Under the downward force of the transverse steel tie rod 24, pressure is applied to the cable strands between the partitions 22, increasing the friction between the main cable and the saddle groove 21. The bridge bears the tension and pressure transmitted by the main cable, ensures the safety and stability of the bridge, avoids sliding, displacement or deformation when bearing tension, maintains the stability of the main cable, and is easy to maintain and inspect, ensuring the safety and efficiency of construction and maintenance, and enhancing the rigidity of the saddle groove, so that the saddle groove is not easily deformed when bearing pressure, thereby improving the rigidity of the entire system.

[0046] The anchor 3 includes a steel corbel 31 fixed on the saddle groove 21 and an anchor head 32 fixed at one end of the steel corbel 31. The steel corbel 31 is a special-shaped plate structure, with straight sides and top, and the bottom has the same curvature as the top of the saddle groove 21. The bottom is fixedly connected to the top of the saddle groove 21 and formed as a whole with its side wall. A connecting plate is welded on the side, and a plurality of through holes are opened on the connecting plate. The bottom surface of the anchor head 32 is a square plate, the width of which is the same as the width of the saddle groove 21. A side plate is symmetrically arranged on the two side edges of the bottom square plate as an anchor beam 321. A connecting plate is welded on one end of the anchor beam 321, and a plurality of through holes are opened on the connecting plate. The connecting plate is fixedly connected to the steel corbel 31 by bolts. A vertical plate is fixed on the other end. A reinforcing rib is arranged between the vertical plate and the bottom plate. At least two countersunk through holes are opened on the side of the vertical plate, and a notch is opened along the through holes to the top of the vertical plate as an anchor hole 322. Part of the steel cables in the main cable are replaced with paired back cables, wherein the back cables are half the length of the main cable, and the back cables are pulled through the saddle groove (21) to the opposite anchor head 32 and fixed in the anchor hole 322. The other steel cables in the main cable are installed in a traditional manner, which increases the force transmission path of the cable strands and converts the side walls of the saddle groove into direct load-bearing components of the cable force, making the force on the saddle more uniform, which is beneficial to reducing the unbalanced force of the main cables on both sides of the saddle, and can improve the nominal friction coefficient and anti-skid safety factor of the main cable, thereby improving the anti-skid stability performance between the cable saddles.

[0047] Preferably, the pommel 2 and the anchor 3 are used in pairs and are symmetrically fixed on the saddle body 1. The above structure is only half of the saddle structure. During installation, the two halves of the same structure are aligned and assembled together at the higher end, and then fixed with bolts to form a complete saddle, and then the main cable is anchored.

[0048] like Figure 5 As shown, a pressure-resistant and wear-reducing saddle for anchoring in an embodiment of the present invention is compared with a traditional saddle by a comparison of force analysis, thereby increasing the force transmission path of the cable strands and turning the side walls of the saddle groove into direct load-bearing components of the cable force, thereby making the force on the saddle more uniform, which is beneficial to reducing the unbalanced force of the main cables on both sides of the saddle, and can increase the nominal friction coefficient and anti-skid safety factor of the main cables, thereby improving the anti-skid stability performance between the cable saddles.

[0049] The load-bearing plate 4 includes a lower plate 41 fixed on the bridge tower and an upper plate 42 fixed on the bottom of the base 11. The lower plate 41 is a square plate structure, which is larger than the bottom plate of the base 11. The bottom surface is fixed to the position where the saddle is to be installed on the bridge tower, and a large shallow groove is opened on the top surface, in which a modified polyformaldehyde wear-reducing plate is embedded. The upper plate 42 is also a square plate structure, which is the same size as the bottom plate of the base 11. The top surface is fixed to the bottom plate of the base 11, and a large shallow groove is opened on the bottom surface, in which a modified polyformaldehyde wear-reducing plate is embedded. During installation, the saddle is easily moved to the designed position on the bridge tower for installation through the friction pair composed of the modified polyformaldehyde wear-reducing plate between the lower plate 41 and the upper plate 42, without causing damage to other parts of the device. It effectively reduces the friction of the saddle during installation and position adjustment, enables the saddle to be smoothly transported to the predetermined position, improves the efficiency of saddle installation, reduces the probability of saddle wear during installation, avoids the transportation of the saddle on the bridge tower, and ensures the safety of construction.

[0050] like Figure 1 As shown, an embodiment of the present invention provides a cable strand anchoring method, comprising the following steps:

[0051] S100, fix the lower deck 41 to the position to be installed on the top of the bridge tower, fix the upper deck 42 to the bottom plate of the base 11, and transport the two halves of the saddle with the upper deck 42 fixed to the hanging position below the bridge tower;

[0052] S200, using a crane to lift the cable saddles onto the top of the bridge tower in turn, using a friction pair composed of a modified polyoxymethylene wear-reducing plate to push the cable saddles to the designed installation position, fixing the two halves of the cable saddle as a whole with bolts, and fixing them at the designed position using a fixing seat on the saddle body 1;

[0053] S300, replace some strands in the main cable with paired back cables, and after the main cable is hoisted in the saddle groove 21, both ends are anchored to the ground, and the anchor heads 32 are bolted to both ends of the steel bracket 31, and then eight back cables are hoisted to the installation position, installed oppositely on the saddle groove 21 and the ends are fixed in the opposite side anchor holes 322, and after completion, the other end is anchored to the ground;

[0054] S400. Fine-tune the position of each main cable in the saddle groove 21. After reaching the optimal position, install the pressure plate 23 according to the site conditions and fix it with the transverse steel tie rod 24. After all the pressure plates 23 are installed, install other transverse steel tie rods 24. Adjust the tightness between the main cables to the optimal state through the nuts on the pressure plate 23 and at both ends of the steel tie rod 24.

[0055] The present invention provides a method for anchoring a pressure-resistant and wear-reducing cable saddle and cable strands. A pressure plate is provided between the partition and the transverse steel tie rod. The height of the adjustment block on the adjustment plate is changed by adjusting the adjustment bolt on the pressure plate, thereby adjusting the compression degree of the main cable in the partition. Together with the transverse steel tie rod, the stress of the main cable is adjusted, thereby ensuring the safety and stability of the bridge and avoiding sliding, displacement or deformation when subjected to tension. A sliding friction pair with a modified polyformaldehyde wear-reducing layer having excellent pressure resistance is provided between the upper and lower bearing plates, so that the saddle can be easily moved to the designed position on the bridge tower for installation without causing damage to other components of the device. The friction force of the cable saddle during installation and position adjustment is effectively reduced, so that the cable saddle can be smoothly transported to the predetermined position, the operating efficiency of the cable saddle installation is improved, the probability of cable saddle wear during installation is reduced, the cable saddle is avoided from being carried on the bridge tower, and the safety of construction is ensured.

[0056] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cable saddle for anchor pressure resistance and wear reduction, characterized in that: include: A saddle body (1) providing support for the entire saddle, the saddle body (1) comprising a base (11) arranged at the bottom, a plurality of longitudinal ribs (12) arranged on the base (11), and transverse ribs (13) arranged between the plurality of longitudinal ribs (12); A saddle head (2) disposed on the saddle body (1), the saddle head (2) comprising a saddle groove (21) disposed on the saddle body (1) and a partition plate (22) disposed in the saddle groove (21); An anchor (3) is arranged on the saddle head (2), the anchor (3) comprises a steel bracket (31) arranged on the side wall of the saddle groove (21) and an anchor head (32) arranged at one end of the steel bracket (31), the saddle body (1) is provided with two symmetrical grooves, the saddle head (2) and the anchor (3) are arranged in pairs on the saddle body (1), and are symmetrically distributed in the grooves to withstand the tension of the suspension cable or the inclined cable, increase the force transmission path of the cable strands, and make the force of the cable saddle more uniform; The saddle head (2) further comprises: a pressure plate (23) provided on the partition plate (22); and a transverse steel tie rod (24) provided on the saddle groove (21); The saddle groove (21) is an arc-shaped columnar structure with the same curvature as the vertical plate of the base (11), and the bottom is the same shape as the groove formed by splicing the vertical plate of the base (11) and the longitudinal rib (12). The top is opened with a deep groove downward, and the bottom of the groove is arranged in a stepped manner with the middle low and the two sides high, and a small groove is opened along the corner edge at the bottom corner of each step; a lifting ear is fixed on an outer side of the saddle groove (21), and through holes are opened symmetrically on both sides along the top edge; the partition plate (22) is an arc-shaped ring plate with the same curvature as the saddle groove (21), and the partition plates (22) are multiple and are fixed in parallel to each other in the small grooves in the saddle groove (21), and are used to separate multiple steel cables installed at the same time to reduce friction between the steel cables.

2. The anchor pressure-resistant and wear-reducing saddle according to claim 1, characterized in that: The anchor head (32) comprises: An anchor beam (321) provided at one end of the steel corbel (31); And an anchor hole (322) provided on the anchor beam (321), which replaces part of the strands in the main cable with paired back cables, which are cross-anchored on the anchor beam (321) on the opposite side.

3. The anchor pressure-resistant and wear-reducing saddle according to claim 2, characterized in that: A reinforcing rib is provided between the anchor beam (321) and the bottom plate of the anchor head (32), and a connecting plate is provided at one end; A vertical plate is provided at the other end of the anchor beam (321), and a hole is opened on the plate to form an anchor hole (322).

4. A pressure-resistant and wear-reducing saddle for anchors according to any one of claims 1 to 3, characterized in that: The upper end of the steel bracket (31) is a flat edge, and the bottom is an arc edge with the same arc as the saddle groove (21), and is fixed thereto as a whole.

5. A pressure-resistant and wear-reducing saddle for anchors according to any one of claims 1 to 3, characterized in that: An adjustment plate is provided on the bottom plate of the pressure plate (23), and both ends of the adjustment plate are inclined surfaces, and adjustment blocks are provided on the inclined surfaces, and the adjustment blocks are connected by long bolts.

6. The anchor pressure-resistant and wear-reducing saddle according to claim 5, characterized in that: The adjusting block of the pressure plate (23) is provided with a notch, and the transverse steel pull rod (24) is pressed into the notch of the adjusting block.

7. A pressure-resistant and wear-reducing saddle for anchors according to any one of claims 1 to 3, characterized in that: It also includes a load-bearing plate (4) arranged at the bottom of the base (11), and the load-bearing plate (4) includes: An upper support plate (42) provided at the bottom of the base (11); and a lower bearing plate (41) arranged on the top of the bridge tower.

8. The anchor pressure-resistant and wear-reducing saddle according to claim 7, characterized in that: The upper bearing plate (42) and the lower bearing plate (41) are both provided with a modified polyformaldehyde wear-reducing plate, forming a friction pair with each other.

9. A cable strand anchoring method, implemented by using a cable saddle for anchor compression resistance and wear reduction according to any one of claims 1 to 8, comprising the following steps: S100, fixing the lower bearing plate (41) to the position to be installed on the top of the bridge tower, fixing the upper bearing plate (42) to the bottom plate of the base (11), and transporting the two halves of the saddle with the upper bearing plate (42) fixed to the hanging position below the bridge tower; S200, using a crane to hoist the cable saddles onto the top of the bridge tower in turn, using a friction pair composed of a modified polyoxymethylene wear-reducing plate to push the cable saddle to the designed installation position, fixing the two halves of the cable saddle into a whole with bolts, and fixing them at the designed position using a fixing seat on the saddle body (1); S300, replacing some of the strands in the main cable with paired back cables, the main cable is hoisted in the saddle groove (21) and then both ends are anchored to the ground, the anchor heads (32) are bolted to both ends of the steel bracket (31), and then eight back cables are hoisted to the installation position, installed oppositely on the saddle groove (21) and the ends are fixed in the opposite side anchor holes (322), and after completion, the other ends are anchored to the ground; S400. Fine-tune the position of each main cable in the saddle groove (21). After reaching the optimal position, install the pressure plate (23) according to the on-site conditions and fix it with the transverse steel tie rod (24). After all the pressure plates (23) are installed, install other transverse steel tie rods (24). Adjust the tightness between the main cables to the optimal state through the nuts on the pressure plate (23) and at both ends of the steel tie rod (24).

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