CN110747739B - Clip type anchorage device of spherical universal mechanism and construction method thereof - Google Patents

Abstract

The invention provides a spherical universal mechanism clamping piece type anchorage and a construction method thereof.A detachable saddle is arranged on a tower frame of a cable-stayed bridge or a short-tower cable-stayed bridge, and steel strands can be independently inserted and distributed in a round steel pipe so as to eliminate the compressive stress and fretting fatigue between the steel strands in the detachable saddle and obviously reduce the stress concentration on the tower frame of the bridge. A conical steel strand inserting hole is formed in the spherical joint, the steel strand is easy to insert through the connecting nut, the spherical universal joint and the wedge-shaped joint structure, the steel strand is easy to install, and the working efficiency is improved; in the construction process of part of the prior art, high-density Polyethylene (PE) on the surface of the stay cable steel strand needs to be removed, and the length of the removed high-density polyethylene is equivalent to the length of the cable saddle steel pipe.

Description

Clip type anchorage device of spherical universal mechanism and construction method thereof

Technical Field

The invention relates to an improvement of bridge cable product technology, in particular to a technology for installing a spherical universal (Ball Joint Cardan) clip type anchorage device on a wire separating tube type cable Saddle (Saddle) on a main tower of a cable-stayed bridge or a short-tower cable-stayed bridge to resist sliding and anchor. The invention provides a technology for carrying out inhaul cable anti-sliding anchoring by utilizing a spherical universal joint principle and a clamping piece type anchorage and a related construction method. The present application claims the benefit of korean patent application No. 10-2018-0147049, filed on 26.11.2018, the entire contents of which are incorporated herein by reference.

Background

In highway bridges and railway bridges, a large number of cable-stayed bridges or short-tower cable-stayed bridges (ED bridges) are designed in the form of cable-stayed bridges or short-tower cable-stayed bridges, which are connected with a main bridge tower and a bridge deck by arranging bridge cables and bridge decks at a certain angle and in sequence, bear part of the weight of a bridge deck box Girder (Girder) by the cables, and transmit various dynamic and static loads to the bridge towers.

As one of the load-bearing members of a cable system for transmitting static and dynamic loads of a bridge deck on a main tower of a cable-stayed bridge or a short-tower cable-stayed bridge, a cable Saddle (Saddle) is widely used, the cable Saddle structure is mounted at the middle tower top position of an anchoring end of the cable system to play a role in supporting and stress transmission, and a steel strand is generally used as a stay cable in the cable system adopting the cable Saddle.

Fig. 1 is a picture of an exemplary conventional short tower cable-stayed bridge, i.e., an ED cable-stayed bridge, fig. 1a) is an ED cable-stayed bridge, fig. 1b) is an ED cable-stayed bridge, and a cable saddle is installed at a main tower position.

As shown in fig. 1a), the ED cable-stayed bridge is a new bridge type combining the advantages of the ordinary box girder bridge and the cable-stayed bridge, and has the characteristics of lighter weight and larger span compared with the ordinary PSC box girder bridge. Compared with a common cable-stayed bridge, the variation range of the stress borne by the stay cable is small, the main tower of the bridge can be made very low, and the construction performance and the economical efficiency of the bridge with the span of 250-400 m are obviously superior to those of the common cable-stayed bridge. The guy cable system of such an ED cable-stayed bridge usually comprises; the cable, the cable saddle and the anchor are three core components. In addition, the ED cable-stayed bridge is classified into 2 types of saddle-equipped and saddle-free configurations. Fig. 2 is a structural view of a general ED cable-stayed bridge cable system.

As shown in fig. 2, the system of ED cable-stayed bridge comprises; the main structures of the main tower (11), a cable saddle (12), an anti-skid anchoring device (13), a guy cable (14), an anchoring tool (15), a bridge deck box girder (16) and the like.

The cable saddle (12) of the ED cable-stayed bridge plays a role in transmitting static load and dynamic load transmitted by the cable (14) to the main tower (11), the cable (14) can generate unbalanced dynamic load force on two sides of the main tower (11) when transmitting the dynamic load and the static load force, and anti-sliding anchoring needs to be carried out at the tower end to prevent the cable (14) from sliding (Slip). According to the difference of the anti-sliding anchoring mode, the cable saddle is divided into two main modes, namely an integral cable saddle mode that an integral cable bundle passes through a larger steel pipe together and an integral cable saddle mode that a guyed steel Strand (Strand) passes through a separated thinner independent steel pipe respectively, namely a split-wire tube type cable saddle mode. The cable saddle is designed into the form of the wire separating pipe, and the main purpose is to reduce the splitting stress of the main tower and avoid the phenomena of compressive stress and friction fatigue generated between the steel strands of the stay cable. Specifically, before concrete pouring of the upper part (design position) of a main tower of a Cable-stayed bridge or an ED Cable-stayed bridge, a Cable saddle which is manufactured according to design and has a certain curvature and a specific shape is placed at the design position, then concrete pouring is carried out to embed the Cable saddle, then a Cable (Cable) is penetrated and installed in the subsequent process, after the Cable is penetrated and installed through the Cable saddle, two ends of the Cable are connected to anchoring tools positioned on a box girder, and then tensioning and anchoring are carried out according to the designed Cable force, so that the main construction content of Cable installation is completed.

During construction, single or bundled cables of the bridge are led out from the two sides of the main tower through the inside of the cable Saddle (Saddle) steel pipes, the two ends of the cables penetrate through the bridge floor at the beam end through the pre-buried pipes pre-buried on the bridge floor box beam and then the anchoring tools are installed at the tail ends of the cables,

a) and b) in FIG. 3 are shown; an outer pipe (21) is embedded in the main tower and is an arc pipe with certain curvature requirement, an opening at the end part of the outer pipe (21) is consistent with the outer end face of the main tower, and an inner pipe (22) penetrates into the outer pipe (21).

Inside 1 above-mentioned inner tube (22), insert and install several cable steel strand wires (23), the inside anticorrosive, anti-skidding grouting material (24) of pouring into of inner tube (22), cable steel strand wires (23) combine into an organic whole through grouting material (24) each other, counterbalance the effect of cable horizontal component through the frictional force that forms between grouting material (24) and cable steel strand wires (23). The stay steel strand (23) is generally formed by twisting and stranding a plurality of steel wires, and is often in the form of an epoxy resin-coated steel strand.

According to the structural characteristics of a bridge, a cable saddle section of a bridge cable with a cable saddle structure not only has the structural characteristics of resisting horizontal unbalanced component force generated on two sides of a bridge tower, but also has the structural characteristics of corrosion prevention and protection, and the friction fatigue (slipping) phenomenon is avoided, and the integral structure can meet the requirement that one or more cables are replaced singly during pulling.

When the filling material filled for resisting horizontal component force and corrosion is cracked under the action of horizontal stress and the like, the corrosion resistance of the stay cable is reduced, the corrosion problem of the stay cable is caused, and the steel strand stay cable which generates the corrosion phenomenon needs to be replaced.

As described above, in the prior art of the so-called double-tube type cable saddle having the outer tube (21) and the 1 inner tube (22) installed in the inner tube thereof, when a problem occurs in the corrosion prevention system portion of the cable saddle and replacement of a single or limited number of stay wires is required, the system cannot support single replacement and replacement of the entire cable bundle is required.

The above-mentioned case of the wire-separating tubular cable saddle is the same; the stay cable steel strands are separately inserted and installed in the steel pipe in a dispersed mode, so that the friction Fatigue (freezing Fatigue) phenomenon caused by mutual compression between the steel strands in the cable saddle can be eliminated, and the splitting stress harmful to the main tower structure is obviously reduced. At present, the cable saddle in the form of the branched pipe mainly comprises modes of V-shaped steel pipe friction anti-sliding, round steel pipe attached with anti-sliding keys (Key Tape), round steel pipe added with epoxy mortar for fixing and the like.

The high-density polyethylene PE anti-corrosion protective layer of the stay cable steel strand inside the cable saddle section in the form of a cable saddle fixed by adding epoxy mortar to the round steel pipe is in a stripped state, the anti-corrosion grouting state of the stay cable steel strand is difficult to confirm, and the cable replacement of a single stay cable steel strand cannot be carried out, so that the steel cable anti-corrosion protective layer has great defects. In the cable saddle form of circular steel pipe plus anti-skidding Key (Key), the anti-skidding Key need carry out the uniform configuration at the front and back both ends of main tower, and the load of the resistance unbalance cable force that actually provides is half of corresponding cable quantity, and only 50% cable force can be utilized promptly, and the requirement is higher, more to the cable force design of cable and the quantity of cable steel strand wires. The principle of the V-shaped steel pipe mode is that after a high-density polyethylene protective layer of a stay cable steel strand of a cable saddle section is completely removed, an exposed part of the steel strand is pressed into a V-shaped groove of a steel pipe, and anti-sliding anchoring is carried out by means of generated friction force. The cable saddle has the disadvantages that the steel strand of the stay cable is fixed in the groove by the cable force of the stay cable, and when the position of the cable saddle and the anchoring point at the beam end generate errors with the design scheme, the stress concentration phenomenon is generated at the outlet of the cable saddle, so that the fatigue damage is generated to influence the service life of the stay cable. In addition, the high-density Polyethylene (PE) protective layers of the stay cable steel strands in the cable saddle section are all stripped, so that the anti-corrosion function of the stay cable is reduced, and the cable saddle has the defect of high manufacturing cost.

In conclusion, the cable saddle and the anchoring anti-skid device can adapt to errors generated in the construction of a bridge and a cable system, overcome the stress concentration phenomenon at the cable saddle caused by unbalanced load at the front and the rear of a main tower of the bridge and reduce cable fatigue, so that the development of the cable saddle and the anchoring anti-skid device for prolonging the service life of a cable of the bridge has strong practical necessity.

Patent document 1, korean registered patent No.: no. 10-1150352 (application date: 3/24/2010), entitled "saddle structure and tension cable";

patent document 2, japanese laid-open patent No.: 2011-162942 (published: 2011, 8/25), entitled "saddle structure and tension cable";

patent document 3, korean registered patent No.: no. 10-1873363 (please date: 2018, 4, month, 26), the invention discloses a permanent magnet linkage symmetrically-configured hydraulic circuit inhaul cable shock absorber and an inhaul cable vibration control method using the same;

patent document 4, japanese registered patent number: no. 4728262 (please date: 2007, 1, 15), title of the invention: "cable saddle structure";

patent document 5, japanese registered patent number: 4663563 (application date: 2006, 3, and 22), the invention provides a bridge saddle structure;

patent document 6, korean registered patent No.: no. 2014-146838 (published: 12/29 2014) discloses a cable saddle for a main bridge tower and a cable construction method using the cable saddle.

Disclosure of Invention

In view of the above, the invention provides a clip type anchorage device of a spherical universal mechanism and a construction method thereof, which are used for solving the problems in the prior art.

In order to solve the defects of the prior art, the invention aims to solve the technical problems; through at the cable-stay bridge, install the anti-skidding anchor device who has the spherical universal joint function on the branch silk tubular cable saddle on the short tower cable-stay bridge king-tower, the cable steel strand wires can adapt to the installation error of cable anchor point automatically, insert respectively independently through anchor device and install and carry out anti-skidding anchor in the cable saddle steel pipe, cable steel strand wires dispersion is installed in independent circular steel pipe separately, eliminate the compressive stress and the friction Fatigue phenomenon (free Fatigue) that produce between the steel strand wires, obviously reduce the splitting stress that cable and cable saddle steel pipe applied main tower concrete structure.

The defects of the prior art can be overcome by utilizing the spherical universal clip type anchorage and the corresponding construction method.

One of the problems to be achieved by the present invention is; by processing a conical (Taper) anchor hole with a certain angle on the spherical anchor, the stay cable steel strand can easily pass through the anchor hole to reach the other side of the bridge tower. The above functions can be realized by utilizing the structure combining the spherical universal joint principle and the clip type anchorage device and the corresponding construction method.

One of the problems to be achieved by the present invention is; one of the main anticorrosion means of the stay cable steel strand is to extrude a layer of high density Polyethylene (PE) on the surface of the stay cable steel strand, which is different from other prior art methods that the polyethylene protective layer of the stay cable steel strand of the main tower section needs to be completely removed.

Method for realizing subject

As a method for realizing the technical problem, the spherical universal clip type anchorage is suitable for a cable-stayed bridge or a short-tower cable-stayed bridge when the spherical universal clip type anchorage is used for preventing the sliding and anchoring of the stay cable

The cable saddle is used for installing an ED cable-stayed bridge and penetrates through the front and the rear of the main tower; when the spherical universal clamping piece type anchorage is installed, one side of the anchorage base is connected with the end part of the wire dividing pipe cable saddle, and the other end of the anchorage base is provided with threads; the main body of the spherical universal clamping piece type anchorage device consists of an upper flange, a lower flange and a spherical anchorage device, wherein the lower part of the lower flange is connected with a spherical universal mechanism base, and the spherical anchorage device is arranged between the lower flange and the upper flange to form a spherical anchorage device assembly; a threaded sleeve designed and manufactured for realizing the displacement of the spherical anchor assembly is arranged between the spherical universal mechanism base and the spherical anchor assembly; the anti-skid anchoring part of the spherical universal clip type anchorage device comprises a fixed disc, a clip fixing spring and a clip pressure adjusting bolt, wherein the clip is inserted into an anchor hole for installing the spherical anchorage device according to the designed depth, a plurality of stay cable steel strands are inserted into the anchor hole for installation, and the clip is compressed to realize anti-skid anchoring.

The fixed disc, the upper flange, the lower flange, the spherical anchorage and the like are connected or fixed through bolts, and the wire-dividing pipe cable saddle transmits the compressive stress and the splitting stress transmitted by the stay cable steel strand inserted into the round steel pipe to the bridge tower in a dispersing manner.

The steel strand of the inhaul cable is normally arranged in the spherical universal clip type anchorage device, in order to keep the tensile force applied to the steel strand of the inhaul cable, the threaded sleeve is combined with the threaded part of the base of the spherical universal clip type anchorage device, and the locking bolt is screwed in the locking bolt hole of each threaded part to prevent the threaded sleeve from loosening and the change of the cable force caused by the loosening.

When the single change is carried out to cable steel strand wires to needs, above-mentioned locking bolt can be demolishd, loosens the rotation of above-mentioned threaded sleeve, can break away from the centre gripping anchor state with above-mentioned cable steel strand wires that are in the anchor state by the clamping piece centre gripping to carry out single change of cable steel strand wires.

The spherical anchorage device is provided with a plurality of bolt holes for connecting bolts of a fixed disc, the fixed disc is provided with a plurality of bolt holes for fixing, and the spherical anchorage device is connected with the fixed disc; the lower flange of the spherical universal clip type anchorage is connected with the base through the threaded sleeve; a plurality of conical stay cable steel strand insertion through holes are processed on two surfaces of the spherical anchorage device, the spherical anchorage device is clamped between an upper flange and a lower flange through the installation and combination of the upper flange and the lower flange to form an assembly of the spherical anchorage device, and the stay cable steel strands penetrate through the spherical anchorage device assembly through the conical through holes.

The spherical universal clip type anchorage has the following characteristics: the fixing and pressing clamping pieces are fixed disks in a targeted manner; the clamping piece is used for anchoring the independent stay cable steel strands and inserted into the conical anchor hole of the spherical anchor by a certain depth; before anchoring the stay cable steel strand, the clamping piece is opened for a certain angle, and the clamping piece fixing spring is arranged on the large end side of the clamping piece;

the hollow pressure adjusting bolt aims at anchoring the stay cable steel strand and compresses the clamping piece to clamp the stay cable steel strand so as to realize the anchoring anti-skidding function. When the stay cable steel strand penetrates from the side of the fixed disc or the other side of the corresponding spherical anchorage device, namely the other side of the bridge tower, the spring on the clamping piece opens the clamping piece inserted into the anchor hole of the spherical anchorage device by a certain depth to a certain angle, so that the steel strand smoothly penetrates through the clamping piece.

The friction force between the inner surface of the round steel pipe of the wire-dividing pipe cable saddle and the surface of the stay cable steel strand, which can be independently installed, is larger, so that the anti-sliding and anchoring of the stay cable are facilitated, and the friction material can be coated on the inner surface of the steel pipe to increase the friction force.

The outer surfaces of the inhaul cable steel strands are respectively provided with a high-density Polyethylene (PE) protective layer which is extruded, and in order to protect the reduction of the corrosion resistance of the inhaul cable steel strands, the proper PE protective layer of the inhaul cable steel strands can be cut off only at the anchoring points anchored by the spherical universal clamping pieces.

As means for achieving the technical subject, the anti-skid cable anchoring device using the spherical universal clip type anchorage and the fixed disk assembly of the invention and the construction method thereof are a) arranging cable saddles in configuration of independent round steel pipes separated from each other on the top of a bridge tower of a cable-stayed bridge or an ED bridge, and making a plurality of cable steel strands penetrate through the independent cable saddle round steel pipes; b) installing a base of a spherical universal clip type anchorage device at the end part of each independent separated steel pipe, and installing the spherical anchorage device between a lower flange and an upper flange on the other surface of the base to form the spherical universal clip type anchorage device; c) a threaded sleeve for providing a telescopic function is arranged between the base and the spherical universal mechanism; d) the spherical anchorage device in the spherical universal anchorage device is provided with a stay cable steel strand insertion opening and an inserted stay cable steel strand; e) the clamping piece which is connected with the fixed disc through the hollow pressure adjusting bolt and is opened at a certain angle is inserted into the anchor hole of the spherical anchor by a certain depth, so that the stay cable steel strand with the polyethylene anticorrosion and retention layer can pass through without obstacle; f) screwing the pressure adjusting bolt, pressing the clamping pieces tightly, and respectively anchoring the stay cable steel strands clamped in the respective clamping pieces so as to maintain the cable force of the stay cable steel strands; and g) after the stay cable steel strand is normally installed in the clamping piece, in order to keep the stay cable force not to be changed due to external stress, the stop bolt is installed on the stop bolt holes respectively processed and formed on the threaded sleeve and the base. The spherical universal clip type anchorage device is characterized in that a plurality of stay cable steel strands are inserted into the separated steel pipe cable saddle, the stay cable steel strands are separated into independent units, and the round steel pipes transmit and disperse the compressive stress borne by the stay cable steel strands and the splitting stress generated by the concrete structure of the induced bridge tower.

Here, the stop bolt in the stage g) may be temporarily removed when the single steel strand cable needs to be replaced, and then the fixing bolt between the fixing disc and the spherical anchor is removed, so that the threaded sleeve is rotated and loosened to the maximum extent, and the universal spherical anchor for anchoring the steel strand cable is moved to open the clamping piece at a certain angle again, thereby releasing the anchoring and replacing the single steel strand cable.

The invention has the following effects: the product of the invention is used as a wire-splitting tubular cable saddle and an anchorage device which are arranged on a main tower of a cable-stayed bridge or a short-tower cable-stayed bridge, and the guy cable steel strands are respectively and independently inserted and arranged in a circular steel pipe in a dispersing way, so that the guy cable steel strands in the cable saddle are mutually isolated, the pressure stress and the friction Fatigue phenomenon (freezing Fatigue) between the steel strands are avoided, and the splitting stress which is generated by the main tower of the bridge due to the stress concentration effect of the steel strands and induces the splitting of the concrete of the main tower can be obviously reduced and dispersed. The anchor with the universal joint function can automatically adapt to the radial deviation of the inhaul cable caused by the installation position deviation generated by the cable saddle and the beam end anchoring point on the tower, so that the radial shear stress generated by the anchor and acting on the inhaul cable can be eliminated.

The invention processes Taper (Taper) hole on the anchor hole of the spherical anchor, which makes the insertion and installation operation of the stay cable steel strand very simple. The anchor base, the threaded sleeve, the spherical universal anchor and the combination mode of using the clamping piece structure enable the insertion installation operation of the stay cable steel strand and the anti-sliding anchoring operation of the stay cable to be convenient and easy, thereby improving the operation efficiency.

When the stay cable steel strand is anchored, the part of the high-density Polyethylene (PE) protective layer on the surface of the stay cable steel strand, which is positioned at the anchoring section, is only required to be cut off, and the high-density polyethylene of the whole bridge tower section is not required to be completely cut off, so that the anti-corrosion function of the stay cable steel strand can be protected to the maximum extent.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1a-1b are diagrams of a typical short tower cable-stayed bridge, i.e. an ED cable-stayed bridge.

Fig. 2 is a structural view of a cable system of an ED cable-stayed bridge, which is a general short-tower cable-stayed bridge.

Fig. 3a-3b are prior art cable saddle mounting diagrams.

FIG. 4 is an exploded view of the spherical universal clip type anchorage device utilizing the principle of spherical universal mechanism and anti-skid anchoring by clips.

FIGS. 5a-5c are schematic structural views of the spherical universal clip type anchor, the split-tube type cable saddle, and the spherical universal clip type anchor main body according to the present invention.

FIG. 6 is a schematic view of the bridge deck universal clip type anchor of the present invention when the universal clip type anchor main body is installed on the base when the cable steel strand is anchored.

FIGS. 7a to 7c are schematic views of a spherical universal clip anchor according to the present invention, in which the main body is mounted to a base via a threaded sleeve.

FIG. 8 is a schematic view of a spherical universal clip anchor according to the present invention with the body mounted on a stationary plate.

FIG. 9 is a schematic top view of a spherical universal clip anchor according to the present invention.

Fig. 10 is a cross-sectional view C-C indicated in fig. 9.

Fig. 11 is an enlarged schematic view of a region D in fig. 10.

FIG. 12 is a schematic view of a spherical universal clip anchor according to the present invention in a sequential manner during construction.

In the figure:

100: spherical universal clip type anchorage

110 cable Saddle with split thread tube (Saddle)

120 anchor Base (Cardan Base)

130 spherical anchor assembly

140 fixed disk assembly

150 fixing bolt

160 Stop Bolt (Stop Bolt)

170 threaded sleeve

121: screw part

122 stop bolt hole

131 lower flange

132 upper flange

133 spherical anchor

141 fixed disk

143 clip fixing spring

210 stay cable steel strand

142 clip (Wedge)

144 pressure adjusting bolt

211, a cable steel strand lead-in port

Detailed Description

The embodiment of the invention provides a clip type anchorage device of a spherical universal mechanism and a construction method thereof, which are used for solving the problems in the prior art.

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to explain the invention in more detail, the following describes a clip type anchorage device of a spherical surface universal mechanism and a construction method thereof in detail with reference to the accompanying drawings.

The present invention will be described in detail so that a person having ordinary skill in the art can easily understand and practice the present invention by referring to the following drawings, but the present invention is not limited to the illustrated examples in view of its various configurations. In the drawings, for the purpose of clearly explaining the principle and structure of the present invention, portions which are not necessary for the explanation and the explanation of the present invention are omitted, and all the similar portions are given similar symbols by the detailed description.

When a certain element is described in the specification as being "included" in a certain portion, unless a claim for specifically objecting to the description is made, the element is not excluded, but the element may be additionally included.

Fig. 4 is an exploded view of the spherical universal clip type anchor for anti-sliding anchorage of a guy cable according to the present invention, and fig. 5 is a diagram of the spherical universal clip type anchor and a split-wire tubular cable saddle according to the present invention.

Referring to fig. 4 and 5, the spherical universal clip type anchor (100) for anti-sliding anchorage of a guy cable comprises a wire-separating tube type cable saddle (110), an anchor Base (Cardan Base; 120), a spherical anchor assembly (130), a fixed disc assembly (140), a fixing bolt (150), a stop bolt (160) and a threaded sleeve (170).

As shown in a diagram of fig. 5, the split-tube cable saddle (110) is a type in which the stay steel strands (210) are inserted and dispersed in a dispersed manner, and is mainly installed on the pylons of a cable-stayed bridge and a pylon-stayed bridge (ED bridge) to penetrate both sides of the pylon, in such a manner that compressive stress generated between the stay steel strands (210) and induced splitting stress generated by the stay to the concrete structure of the main pylon of the bridge are dispersed harmlessly. In other words, the split-tube cable saddle (110) is installed inside a circular steel pipe of the cable saddle by separately inserting the guy cable steel strands, and disperses the compressive stress generated between the plurality of guy cable steel strands (210) and the splitting stress of the guy cable system to induce splitting generated in the concrete structure of the main tower of the bridge. In addition, the friction force can be increased by coating a certain thickness of friction material on the inner surface of the round steel pipe of the wire-separating pipe type cable saddle (110) or the surface of the inhaul cable steel strand.

One end of the spherical universal clip type anchorage base (120) is combined with the end of the wire separating pipe type cable saddle (110), and the outer surface of the other side cylinder is provided with a threaded part (121), and as shown in figure 6, the threaded part (121) of the cylinder is provided with a stop bolt hole (122).

The spherical anchorage assembly (130) mainly comprises a lower flange (131), an upper flange (132) and a spherical anchorage (Ball Joint:133), wherein the lower flange (131) is connected with an anchorage base (120) of the spherical universal clip-type anchorage body, and the spherical anchorage (133) is arranged between the lower flange (131) and the upper flange (132) to form an integral component.

Specifically, as illustrated in b) of fig. 5, a plurality of fixing holes for fixing the bolts (150) are formed on the lower flange (131) of the universal clip-type spherical anchor assembly (130). A threaded sleeve (170) is connected to the anchor mount (120). Meanwhile, the upper flange (132) of the spherical anchor assembly (130) is also provided with a plurality of threaded holes used when corresponding fixing bolts (150) are fixed. The anchorage is integrated by the connecting and fixing action of the fixing bolt (150) and is connected with the cable saddle through the lower flange (131). A conical (Taper) anchor hole corresponding to the guy cable steel strand introducing port (211) is processed on the spherical anchor (133) on the spherical anchor assembly (130), and the spherical anchor is installed between the lower flange (131) and the upper flange (132) and forms an integrated part with the upper flange and the lower flange.

The threaded sleeve (170) is arranged between the universal clip type anchorage base (120) and the universal clip type spherical anchorage assembly (130), and the up-and-down telescopic function of the whole anchorage is realized through the relative movement of the lower flange (131). The fixed disk assembly (140) is composed of a fixed disk (141), a clamping piece (142), a clamping piece fixing spring (143) and a pressure adjusting bolt (144), wherein the clamping piece (142) is partially inserted and installed on a conical anchor hole of the spherical anchor assembly (130) on the side of the upper flange (132) to anchor a guy cable steel strand penetrating through the conical anchor hole. The inhaul cable steel stranded wires (210) are respectively covered with a high-density Polyethylene (PE) protective layer, and in order to reduce the damage to the anticorrosion function of the inhaul cable steel stranded wires (210) during the anchoring construction, the polyethylene layer of the inhaul cable steel stranded wires (210) is stripped at the position of the fixed disc assembly (140) during the construction, and then the anchoring operation is carried out.

As shown in c) of fig. 5, the anchor plate (141) of the anchor plate assembly (140) is provided with a hollow bolt capable of fixing the clip (142) to the spherical anchor assembly (130) at a specific position and a specific depth. The clip (142) installed on the fixed disk assembly (140) is inserted into the guy cable steel strand introducing port (211) of the spherical anchorage device (133) before the guy cable steel strand (210) is respectively anchored. The clip fixing spring (143) on the fixing plate assembly (140) fixes the clip (142) after the clip is opened by a certain angle, and the angle is changed along with the depth of the clip entering the anchor hole. The purpose of anchoring the stay cable steel strand (210) is achieved by adjusting the pressure adjusting bolt (144) on the fixed disc assembly (140) to press the clamping piece (142). When the stay cable steel strand (210) passes through the fixed disc assembly (140) and the clamping piece (142) from any side of the bridge tower, the position form is that the clamping pieces are separated by a certain angle by the fixed clamping piece fixing spring (143), the steel strand is guided to smoothly enter the anchor hole on the spherical anchor (133), and the hole on the other side of the bridge tower is also in a state that the steel strand can smoothly pass through.

The fixing bolt (150) is used for connecting and fixing the fixed disc assembly (140), the fixed disc (141) and the lower flange (131) of the spherical clamping piece type anchorage.

And the stop bolt (160) is arranged in the stop bolt hole (122) on the threaded sleeve (170) and the threaded part (121) of the universal clip type anchorage base (120), and is used for keeping the input cable force from changing due to the action of external force after the cable steel strand (210) on the fixed disk assembly (140) is installed. On the other hand, when the single steel strand (210) of the inhaul cable needs to be replaced, the stop bolt (160) can be temporarily detached, the threaded sleeve (170) is rotated after the bolt fixing bolt is detached to separate and release the anchoring state of the fixing disc assembly (140), and then the steel strand (210) of the inhaul cable is individually released and the single steel strand replacing rope is carried out.

The cable saddle shape of the wire separating pipe in the prior art usually realizes the anti-skid anchoring of the inhaul cable by means of the friction force generated by the steel pipe for wire separation or the anti-skid device arranged on the end surface of the cable saddle, and has the problems of difficult single cable replacement or insufficient arrangement of the front and rear unbalanced forces for resisting the bridge tower and the like;

when the spherical universal clamping piece type anchorage device (100) is used for installing the inhaul cable, the inhaul cable steel strand (210) is inserted into the anchorage device and tensioned, and the clamping piece (142) is pushed into the anchor hole deeper and pressed tightly by simply screwing the pressure adjusting bolt (144) on the fixed disk assembly (140), so that the inhaul cable can be subjected to anti-sliding anchoring. Because the product is provided with the telescopic threaded sleeve (170) which can release the anti-sliding anchoring state, the cable replacement requirements caused by errors and quality problems in the construction process can be easily solved.

FIG. 6 is a partial oblique view of the spherical universal clip type anchor of the present invention installed on an anchor base by connection, FIGS. 7a to 7c are illustrations of the spherical universal clip type anchor installed on the anchor base by connection with a threaded sleeve, FIGS. 7a and 7B are sectional views in the line A-A direction indicated in FIG. 6, and FIG. 7c is a detailed view of the area B in FIG. 7 a.

As shown in FIG. 6, in the spherical universal clip type anchor (100) of the present invention, a spherical universal clip type spherical anchor assembly (130) may be installed on the universal clip type anchor base (120), and a threaded sleeve (170) having a telescopic adjustment function is installed between the anchor base (120) and a lower flange (131) of the spherical universal clip type spherical anchor assembly (130) to perform a stress transmitting function.

Fig. 7a is a sectional view taken along a line a-a in fig. 6, which shows a connection state between the lower flange (131) and the anchor base (120) when the bridge cable and the anchor are normally installed and tensioned with a certain cable force, and fig. 7b is a sectional view taken along a line a-a in fig. 6, when a single cable steel strand (210) needs to be replaced, the stop bolt (160) and the fixing bolt are removed, the threaded sleeve (170) is rotated to a limit position, the fixing disc assembly (140) is loosened from a stressed state, and then the steel strand can be released and replaced with a specific steel strand. FIG. 7c is a detailed cross-sectional view taken along line B-B of FIG. 7a, showing a stop bolt (160) installed in a stop hole in a threaded portion of anchor base (120). The joint between the sleeve and the flange, which ensures free rotation of the sleeve, is designated 134.

FIG. 8 is a side view of the mounting position of the pressure adjusting bolt and clip of the spherical universal clip anchor of the present invention.

As shown in figure 8, the spherical anchorage device in the spherical anchorage device assembly (130) of the spherical universal clip type anchorage device (100) is provided with an anchorage hole which is corresponding to the guide inlet (211) of the stay cable steel strand and through which the steel strand can pass, when the stay cable is anchored, the stay cable steel strand (210) is inserted and installed in the anchorage hole, and the depth of the clip (142) is adjusted by a device on the fixed disc assembly (140), so that the pressure for clamping the stay cable steel strand (210) is adjusted, and the purpose of anti-sliding anchoring is achieved.

In order to enable the steel strand to smoothly pass through the anchoring part in the forward and reverse directions, conical (Taper) shapes are processed at two ends of an anchor hole on the spherical anchor (133), and the size of a guy cable steel strand introducing port (211) can enable the steel strand with a polyethylene protective layer to smoothly pass through, so that the guy cable steel strand (210) can pass through the anchoring section without obstacles for installation.

The basic situation of the prior art short tower cable-stayed bridge, namely the ED cable saddle, is as follows: if the cable saddle section on its tower adopts clip formula ground tackle to carry out the antiskid anchor, because cable steel strand wires (210) of cable saddle section are shorter, need change cable steel strand wires (210) and loosen tension to the cable when hanging cable construction or later stage maintenance at the bridge, cable steel strand wires can't provide abundant elongation, and then the clip is hardly pulled out the anchor eye to the change to the cable causes the difficulty. And the tension exceeding the designed tension value of the steel strand is used for forcibly stretching the steel strand so as to pull out the clamping piece, so that irreversible influence and damage can be generated on the bridge tower. In view of this, the present invention contemplates providing a telescopic threaded sleeve (170) between the spherical anchor assembly (130) and anchor base (120) to allow for the removal of clamping pressure by telescopic action if desired. The Stop Bolt (Stop Bolt:160) fixing the threaded sleeve (170) is removed, the threaded sleeve (170) is rotated by using a special Tool (Tool) to move towards the anchor base (120), and if necessary, the threaded sleeve is screwed to the end point of the threaded part (121), and the clamping piece (142) is separated from the inhaul cable steel strand (210) clamped by the clamping piece by a certain distance and space, so that the steel strand is easy to replace.

FIG. 9 is a top view of the spherical universal clip type cable anchor of the present invention, showing the combination of the anchor mounting plate and the hollow pressure adjusting bolt, FIG. 10 is a cross-sectional view taken along section line C-C of FIG. 9, and FIG. 11 is a detailed view of area D indicated in FIG. 10. Fig. 11 a) shows the position and shape of the clip before the steel strand is introduced into the installation and tensioning, and b) shows the position and shape of the clip when the clip is compressed for anchoring after the stay cable steel strand is tensioned.

As shown in fig. 11a, the clip 142 mounted on the fixed tray assembly 140 is mounted on the fixed tray assembly by the clip fixing spring 143 being opened at a certain angle by a certain distance, that is, as shown in fig. 10; even if the inhaul cable steel strand (210) enters and exits from the inhaul cable steel strand from the opposite direction, no obstacle exists in the inserting process. The steel strand will pass through the anchoring part in a state that the lower clip (142) is opened at a certain angle and distance under the support of the clip fixing spring (143).

In summary, in the product structure of the invention, the steel strands can be separately and separately penetrated into the circular steel pipe in a dispersed manner, and can pass through the anchoring part without obstacles, so as to form a new-type wire-separating pipe type cable saddle, and as with other prior art wire-separating pipe cable saddles, the pressure stress and friction Fatigue phenomena (free Fatigue) between the steel strands do not exist, and the influence of the stress concentration on the bridge main tower for inducing the concrete structure to split can be greatly reduced and dispersed.

The application also includes a method of construction using a cable saddle fitted with a spherical universal clip anchor.

FIG. 12 shows a construction method and a process for constructing a cable saddle with a spherical universal clip anchor.

With reference to fig. 12, the operation of the cable saddle with the spherical universal clip type anchorage is as follows; firstly, a prefabricated split-wire tubular cable saddle (110) is installed on a bridge tower of a cable-stayed bridge or a short-tower cable-stayed bridge (ED bridge), then, the anchorage device and other accessory parts of the invention are pre-installed in a non-fastening installation mode, and then, the stay cable steel stranded wires (210) are independently dispersed and penetrated through the split-wire tubular cable saddle (110) (S110), the mode can avoid the mutual compression stress generated after the stay cable steel stranded wires (210) penetrating through the split-wire tubular cable saddle (110) are tensioned, and can disperse and induce the splitting stress of bridge tower concrete splitting, namely, the form of cable saddle supports that the stay cable steel stranded wires (210) are independently and dispersedly inserted into a saddle-mounted circular steel pipe.

Next, fixing bolts of the anchor base (120) pre-installed at the end of the split-tube type cable saddle (110) are locked and fixed, and then a spherical anchor assembly (130) composed of a lower flange (131), an upper flange (132) and a spherical anchor (133) is fixed on the threaded side of the anchor base (120) (S120). Two ends of an anchor hole of the spherical anchor (133) on the spherical anchor assembly (130) are provided with conical (Taper) anchor holes which can enable the stay cable steel strand (210) to smoothly pass through without obstacles and correspond to the stay cable steel strand introducing port (211).

Next, the threaded sleeve (170) between the anchor base (120) and the spherical anchor assembly (130) is rotated to the bottom (S130).

Next, the polyethylene protective layer of the stay cable steel strand (210) at the spherical anchor (133) position on the spherical anchor assembly (130) is peeled off, and the anchor and the sleeve are moved so that the peeled position is positioned inside the stay cable steel strand introduction port (211) (S140).

And next, the clamping piece (142) on the fixed disc assembly (140) is rotated to a proper position, and the steel strand protective layer stripping section completely enters the inhaul cable steel strand introducing port (211), so that the whole anchorage device is positioned at the position where the protective layer of the inhaul cable steel strand (210) is stripped (S150). That is, even if the stay cable steel strand is inserted in the direction opposite to the direction of the fixed tray assembly, the clip type of the clip (142) is opened at a certain angle by the clip fixing spring (143), so that the steel strand can be smoothly inserted into the anchor hole and the stay cable steel strand inlet (211) of the spherical anchor (133) without any obstacle.

Next, after the cable is stretched to the designed tension, the pressure adjusting bolt (144) on the fixed disk assembly (140) is tightened according to a specific torque to press the clamping piece (142) to enter a deeper position of the anchor hole, so that the purpose of anti-sliding anchoring of the cable steel strand (210) is achieved (S160).

Next, the stay cable steel strand (210) is normally installed on the fixed disc assembly (140), so that the stay cable steel strand can keep the tension force which is already input from being changed due to the influence of external factors.

The locking bolt (160) is tightened and locked to the locking bolt hole (122) of the threaded sleeve (170) and the threaded portion (121) of the anchor base (120) (S170). When the installed guy cable steel strand (210) needs to be replaced by a single one, the stop bolt (160) is temporarily removed, and then the threaded sleeve (170) is screwed to enable the borne tension and the borne tension of the fixed disk assembly (140) to be released, so that the single replacement operation of the guy cable steel strand (210) can be implemented.

The stay cable steel strand (210) is provided with a high-density Polyethylene (PE) anticorrosion protective layer, and in order to reduce the reduction of the anticorrosion function of the stay cable steel strand (210) as much as possible, one of the characteristics of the patent is that the polyethylene protective layer of the whole cable saddle section is not completely cut off, but only a small part of the front part and the rear part of the stay cable steel strand (210) in the fixed disc assembly (140) is cut off for anchoring. If the anticorrosion conditions allow all anticorrosion protection layers of the cable saddle section to be cut off, the treatment method of the patent is to coat friction materials on the interior of the round steel pipe of the branch wire pipe type cable saddle (110) or the exposed part of the cut steel strand anticorrosion protection layer to increase friction force and improve anchoring performance.

That is, when the product of the invention is used, only the protective layer of the guy cable steel strand (210) in the spherical universal clip type anchorage section in the integral guy cable steel strand (210) with the high-density Polyethylene (PE) anticorrosive layer needs to be cut off, so that the problem of reduced anticorrosive capability caused by the defect of the protective layer can be reduced. Meanwhile, due to the function of the spherical universal joint structure, the shearing stress borne by the inhaul cable can be greatly reduced, so that the fatigue damage phenomenon of the inhaul cable is reduced. As also previously described, the combination of the anchor mount (120), threaded sleeve (170), spherical anchor assembly (130) and retaining plate assembly (140) facilitates threading and installation of the cable strand (210) and improves operational efficiency.

The foregoing description of the present invention is provided to explain the mechanism of the present invention, and a person having ordinary skill in the art to which the present invention pertains can change the structure of the present invention into other specific forms without changing the technical idea and essential features of the present invention, and thus the above-described examples are merely to be considered as representative examples and are not limited to the examples. For example, the description of each component in a single form may be distributed. Conversely, the descriptions of the respective components in the dispersed form may be combined into a single form.

The mechanism of the present invention is clarified by the above description, but the scope of the claims is mainly defined by the following description, and all the modifications and variations of the meaning and scope of the claims including the equivalent concept are included in the scope of the interpretation of the patent.

Claims (8)

1. A spherical universal mechanism clip type anchorage device is characterized in that a plurality of stay cable steel strands (210) are separately and dispersedly penetrated into a wire-separating tubular cable saddle (110) of a cable saddle steel pipe, namely, the stay cable bridge or a short-tower cable-stayed bridge tower is penetrated, and anti-skid anchoring devices are arranged on two sides of the bridge tower;

one side of the anti-sliding anchoring device is combined with one end part of the inhaul cable steel strand splitting tubular cable saddle (110), and the combined part of the other side is an anchorage device base (120) of a spherical universal mechanism which is provided with a threaded part (121);

the spherical anchor main body consists of a lower flange (131), an upper flange (132) and a spherical anchor (133), wherein the lower flange (131) is combined with the anchor base (120), and the spherical anchor (133) is arranged between the lower flange (131) and the upper flange (132) to form a spherical anchor assembly (130);

a threaded sleeve (170) acting as a telescopic function is connected between the anchor base (120) and the lower flange (131) of the spherical anchor assembly (130);

the product component fixing disc (141), the clamping disc (142), the clamping disc fixing spring (143) and the hollow clamping disc pressure adjusting bolt (144) are combined to form a fixing disc assembly, the clamping disc (142) is installed between an upper flange (132) of the spherical anchor assembly (130) and the clamping disc fixing disc assembly (140), and after the assembly is completed, the inhaul cable steel strand (210) can be subjected to anti-sliding anchoring;

a fixed disk (141) on the fixed disk assembly (140), the upper flange (132) and the lower flange (131) are fixed by a fixing bolt (150) through a processed screw hole respectively;

after the stay cable steel strand (210) is installed on the round steel pipe of the wire-dividing pipe type cable saddle (110), the effect of transferring the stress borne by the stay cable steel strand (210) in the steel pipe and dispersing the splitting stress borne by the main tower of the bridge is achieved;

the spherical anchorage assembly (130) is assembled and fixed through a plurality of fixing bolts (150); the threaded sleeve (170) is connected with the anchor base (120) and the lower flange (131) in a combined manner; a plurality of screw holes for installing and combining the fixing bolts (150) are processed on the lower flange (131) and the upper flange (132), and the lower flange (131) and the upper flange (132) are installed and combined by the fixing bolts (150); the bolt for adjusting the clamping piece pressure is provided with a conical through hole with a certain angle, namely a steel strand leading-in hole (211), and the spherical anchor (133) is arranged between the lower flange (131) and the upper flange (132) and forms an assembly with the lower flange and the upper flange to provide the function of adjusting the stress direction.

2. The spherical universal mechanism clip type anchorage of claim 1, wherein the stay wire steel strand (210) is inserted and installed on the fixed disk assembly (140), and the threaded sleeve (170) is combined with the threaded part (121) of the anchorage base (120); the two parts are provided with stop bolt holes (122) with the same size, and stop bolts (160) are arranged on the stop bolt holes to control the screw engagement not to be loosened by stress, so that the tension of the stay cable which is input into the cable force is kept not to be changed permanently.

3. The spherical universal mechanism clip type anchorage of claim 2, wherein the stop bolt (160) and the cable strand (210) are temporarily removed to release the cable force when the cable strand is replaced individually, and then the threaded sleeve (170) is rotated to separate the anchor from the fixed disk assembly (140) by a certain distance, so that the cable strand (210) is replaced individually after the integral cable bundle is separated from the anti-skid anchoring load state.

4. The spherical gimbal mechanism clip type anchor of claim 1, wherein the fixed disk assembly (140) is: a fixing plate (141) for fixing the position of the clamping piece (142); a steel strand guide hole (211), an anchoring clamping piece (142) and a spherical anchorage device (133) for installing the steel strand (210) of the inhaul cable; a spring (143) mounted on the side of the large end surface of the clip (142) for keeping the clip (142) at a certain opening angle; and the pressure adjusting bolt (144) presses the clamping piece (142) to generate anchoring force, when the stay cable steel strand (210) is inserted reversely from the other side of the two ends of the main tower of the bridge and finally the stay cable steel strand (210) is inserted into the fixed disk assembly (140), the clamping piece (142) is in a state of opening a certain angle under the action of the spring (143), so that the steel strand can smoothly pass through the fixed disk assembly (140), the spherical anchorage device (133) and the steel strand guide hole (211) on the other side.

5. The spherical universal mechanism clip type anchorage of claim 1, wherein friction is increased by coating friction material inside the steel pipe of the split-wire tubular cable saddle (110) or on the surface of the length of the stay cable steel strand cable saddle segment.

6. The clip-type anchorage of spherical surface universal mechanism according to claim 5, wherein the surface of the guy cable steel strand (210) is provided with a high density Polyethylene (PE) protective layer as an anti-corrosion barrier, and in order to reduce the damage of the anti-corrosion function of the guy cable steel strand (210) as much as possible, the anti-skid anchorage is performed after the minimum amount of the high density Polyethylene (PE) protective layer is peeled off on the guy cable steel strand (210) between the fixed disk assembly (140) and the anchorage point.

7. A method of constructing a spherical gimbal mechanism clip anchor as claimed in any of claims 1 to 6, wherein:

a) a stage of installing a steel strand wire separating tubular cable saddle (110) in a round steel pipe shape at the upper ends of main towers of the cable-stayed bridge and the short-tower cable-stayed bridge and installing a plurality of stay cable steel strands (210) in the round steel pipe of the steel strand wire separating tubular cable saddle (110);

b) an anchorage base (120) of a spherical universal clip type anchorage is arranged at the end part of the steel strand wire-dividing tubular cable saddle (110); a spherical anchorage assembly (130) for installing a spherical anchorage (133) between a lower flange (131) and an upper flange (132) of the spherical universal clip type anchorage, and a stage of installing the spherical anchorage assembly on the anchorage base (120);

c) a step of installing a threaded sleeve (170) between the anchor base (120) and the spherical anchor assembly (130) to provide a telescopic function;

d) the stage of inserting the inhaul cable steel strand into the steel strand guide hole (211) and installing the inhaul cable steel strand (210) on the spherical anchorage device (133) of the spherical anchorage device assembly (130);

e) inserting the stripped part of the polyethylene protective layer of the steel strand into the steel strand leading-in hole (211) and penetrating the steel strand by a clamping piece (142) on the fixed disc assembly (140) in a state of opening a certain angle;

f) after the tension force is applied to the inhaul cable steel strand (210), rotating a pressure adjusting bolt (144) on the fixed disk assembly (140) and applying proper pressure to the clamping piece (142) to clamp the steel strand for anti-sliding anchoring;

g) the stage of normally inserting and installing the stay cable steel strand (210) on the fixed disc assembly (140), and normally installing all the stop bolts (160) on the threaded sleeve (170), the threaded part (121) of the anchorage base (120) of the spherical universal mechanism and the stop bolt holes (122) in order to keep the certain tensile force of the stay cable from generating permanent change due to external stress;

in order to eliminate or disperse the pressure stress between the steel strand split tube type cable saddle (110) and the splitting stress for inducing the bridge tower to crack, a plurality of steel strands (210) are inserted into the round tube independently, in order to make the steel strands (210) pass through the ball anchor assembly (130) in the stage d), taper holes with certain angles are processed at the two ends of the through hole of the steel strand leading-in hole (211) and the two ends of the anchor hole of the spherical anchor (133), the clamping piece (142) in the stage e) is arranged at one side of the fixed disc assembly (140) facing the spherical anchor, and the clamping piece (142) is opened with certain angle by using a fixing spring (143) so that the steel strands (210) can be inserted into the anchor hole and the steel strand leading-in hole (211) arranged on the spherical anchor (133) smoothly, the inhaul cable steel strand (210) described in the stage e) is provided with a high-density Polyethylene (PE) protective layer, in order to prevent the reduction and the damage of the anticorrosion function of the inhaul cable steel strand (210), the high-density Polyethylene (PE) protective layer of the inhaul cable steel strand (210) is peeled off within a certain distance of the fixed disk assembly (140), and the construction method utilizing the spherical universal clip type anchorage device is characterized in that the antiskid anchoring is carried out in the stage.

8. The method of claim 7, wherein said stop bolt (160) of stage g) is temporarily removed during individual replacement of said cable strand (210), the force applied to said cable is released by rotating said threaded sleeve (170), the pressure applied to said mounting plate assembly (140) is released, and then said cable strand (210) to be replaced is released and removed for replacement.

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