JP6346847B2 - Anchor cable fixing structure - Google Patents

Description

  The present invention relates to a structure for fixing an oblique cable that is formed on the upper part of a main tower of a cable-stayed bridge, which is one type of bridge, and that supports and supports a bridge girder.

  A cable-stayed bridge is one in which an oblique cable is stretched diagonally downward in the axial direction of the bridge girder (hereinafter referred to as the bridge axis direction) from the upper part of the main tower standing on the pier, and the girder is suspended and supported by this oblique cable. . In most cases of large cable-stayed bridges, a plurality of diagonal cables are stretched from the main tower to both the front and rear in the direction of the bridge axis to support the bridge girder extending on both sides of the pier. In such a cable-stayed bridge, cables from both sides in the bridge axis direction are fixed on the upper portion of the main tower, and a plurality of diagonal cables are arranged and fixed in the vertical direction. In particular, in the cable-stayed bridge, which is generally called the extradosed type, the height of the main tower is small and the distance between the cables in the vertical direction is small. It is fixed by. For this reason, a large tensile force is transmitted from a plurality of oblique cables to a small range in the upper part of the main tower. Also, between the two cables stretched on both sides, the tensile force is transmitted between each other, canceling out the horizontal component of the tensile force, so that a large horizontal force does not act on the entire main tower. Yes.

  An oblique cable fixing structure having such a structure is disclosed in, for example, Patent Document 1 or Patent Document 2.

In Patent Document 1, a box-shaped steel shell portion is installed on the upper part of the main tower so that diagonal cables are fixed from both sides in the bridge axis direction, and the steel shell portion is stretched in both directions in the bridge axis direction. A structure for transmitting the tensile force of a diagonal cable between each other is described.
In the fixing structure of the oblique cable described in Patent Document 2, two steel side plates are arranged in the bridge axis direction, and a concrete member is formed so as to wind around these. The oblique cable stretched in both directions in the bridge axis direction is fixed to the concrete member through a positioning plate made of steel between the two steel side plates. And the horizontal component of the tensile force of the slant cable stretched on both sides is transmitted between the slant cables via the concrete member and the steel side plate integrated with the concrete member. .

JP 2002-348813 A JP 2007-51432 A

  In the fixing structure of the oblique cable described in Patent Document 1, since a steel member formed in a box shape is used in a portion where the oblique cable is fixed, the weight of the steel material increases and welding is performed for the formation of the steel member. A lot of processing such as is required. Further, in the fixing structure of the oblique cable described in Patent Document 2, the oblique cable is fixed to the concrete member, and a tensile force is applied from the concrete member to the steel side plate via a stud gibber provided on the outer surface of the two steel side plates. Is to be transmitted. For this reason, the dimension of a concrete member becomes large and in order to reinforce a concrete member, arrangement | positioning of a complicated reinforcing bar is needed.

  The present invention has been made in view of the above problems, and its purpose is to facilitate the construction of the oblique cable fixing portion in the upper part of the main tower and to reduce the size of the oblique cable fixing portion. It is to provide a fixing structure of the oblique cable.

  In order to solve the above-mentioned problem, the invention according to claim 1 is provided at the upper part of the main tower of the cable-stayed bridge, and one side and the other in the axial direction of the cable-stayed bridge (hereinafter referred to as the bridge axis direction) from the main tower. A plurality of oblique cable fixing structures that are suspended obliquely downward on both sides and support a bridge girder, wherein the upper end portion of the oblique cable that is extended on one side in the bridge axis direction is fixed; A second concrete block that is provided adjacent to the first concrete block at an interval in the bridge axis direction and to which an upper end portion of the oblique cable stretched on the other side in the bridge axis direction is fixed. Two steel plates arranged in close contact with both side surfaces of the first concrete block and the second concrete block and connecting the two concrete blocks; the two steel plates and the first concrete block; A plurality of tension members that penetrate through the second block or the second concrete block, and are tightened so that the two steel plates sandwich the first concrete block or the second concrete block when tension is introduced. Fixing of an oblique cable in which the first concrete block, the second concrete block and the steel plate are supported on the bridge girder or the leg of the main tower standing on the pier supporting the bridge girder Provide structure.

In this oblique cable fixing structure, the tensile force of the oblique cable is transmitted to the first concrete block and the second concrete block, respectively. And since two steel plates are arrange | positioned so that two concrete blocks may be pinched | interposed and it is clamp | tightened by the tension material, a steel plate and a concrete block are integrated firmly, and the tensile force of a diagonal cable is transmitted to a steel plate. Since the two steel plates connect the two concrete blocks to each other, the tensile force of the diagonal cable stretched in both directions in the bridge axis direction is transmitted from the concrete block to the other via the two steel plates. The horizontal component is almost canceled out.
Further, since the concrete block is sandwiched and tightened with a steel plate having a high rigidity, the compressive force acts on the concrete block in a wide range, and the generation of tensile stress in the concrete block can be effectively suppressed. Therefore, the concrete block can be sufficiently reinforced with a small amount of reinforcing bars, the workability is improved, and the structure part that transmits the tensile force of the diagonal cable stretched on both sides to each other has a simple shape and small dimensions. It can be.

  The invention according to claim 2 is the fixing structure of the oblique cable according to claim 1, wherein both of the two steel plates are divided into a plurality of parts arranged in the vertical direction. 1 pair or plural pairs of the diagonal cable to one side and the diagonal cable to the other side are fixed, and the first concrete block and the second concrete block are It is assumed that the concrete is cast so as to be continuous over the upper and lower boundaries of the respective divided portions of the steel plate.

  In this fixing structure of the slant cable, the weight of each divided part can be reduced by dividing the steel sheet into a plurality of parts, and the work of installing these steel sheets by lifting them on the upper part of the main tower Is facilitated. In addition, the diagonal cable to one side and the diagonal cable to the other side which are paired are not affected by the horizontal component of the tensile force being transmitted by the steel plate continuous in the horizontal direction and by dividing the steel plate. On the other hand, the vertical component of the tensile force acting on the diagonal cable is transmitted to the bridge girder or pier by the concrete block that is continuous up and down, and it is not necessary to transmit the vertical force at the boundary between the divided steel plates, such as welding No need to join by.

  The invention according to claim 3 is the fixing structure of the oblique cable according to claim 1 or 2, wherein the region of the steel plate in close contact with the first concrete block and the second concrete block is prevented from slipping. A member is fixed and embedded in the concrete, and the slip prevention member is inserted into a plurality of plate-like ribs fixed to protrude from the steel plate, and through holes provided in each of the ribs, And a steel pipe filled with a reinforcing bar or mortar continuous over a plurality of the ribs.

  In this oblique cable fixing structure, the steel plate and the concrete block are firmly integrated by the slip prevention member. In addition, the slip prevention member has a plurality of plate-like ribs, and the rigidity of the steel plate is increased. Therefore, when it is tightened with a tendon, it is possible to suppress the generation of tensile stress in the concrete block by introducing compressive stress more widely distributed in the concrete block.

  The invention according to claim 4 is the oblique cable fixing structure according to any one of claims 1 to 3, wherein the first concrete block and the second concrete block are arranged so as to sandwich the first concrete block and the second concrete block. An outer concrete part is provided so as to be in close contact with the outer surface of the steel sheet, and the tension material is fixed to the outer concrete part.

  In this oblique cable fixing structure, since the tension material is fixed to the outer concrete portion that is in close contact with the outer surface of the steel plate, the force of tightening the steel plate by the tension material is transmitted to the steel plate through the outer concrete portion, and is more nearly equal. It is distributed in the state and acts on the steel sheet. Further, by fixing to the outer concrete portion, it becomes easy to embed the fixing portion of the tendon material in the concrete, and corrosion of the fixing portion is suppressed.

  As explained above, in the fixing structure of the oblique cable according to the present invention, the size of the upper part of the main tower can be reduced, and a structure with good workability can be obtained.

1 is a schematic side view showing an extradosed type cable-stayed bridge in which an oblique cable fixing structure according to an embodiment of the present invention can be preferably employed. It is the main tower of the cable-stayed bridge shown in FIG. 1, Comprising: It is the side view and front view of a main tower which employ | adopted the fixing structure of the diagonal cable which is one Embodiment of this invention. It is the plane sectional view and standing sectional view which show the fixing structure of the diagonal cable which is acting on the upper part of the main tower shown in FIG. They are the plane sectional view of the structure using the other example of the slip prevention member provided in the part which a steel plate and a concrete block closely_contact | adhere, and a schematic perspective view which shows this slip prevention member. FIG. 4 is a cross-sectional plan view showing an example in which an exterior is applied to the main tower shown in FIGS. 2 and 3. It is a plane sectional view which shows the fixing structure of the diagonal cable which is other embodiment of this invention. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic side view showing an extradosed type cable-stayed bridge in which the fixing structure of the present invention can be suitably employed.
This cable-stayed bridge is composed of a bridge girder 3 laid over the abutment 1 and the pier 2, a main tower 4 raised on the pier 2, and an axial direction of the bridge girder 3 from the upper part of the main tower 4. It has a plurality of diagonal cables 5 and 6 that are stretched obliquely downward and support the bridge girder 3 in an oblique direction.
The extradosed type cable-stayed bridge has a relatively large bending rigidity of the bridge girder 3 and a small height of the main tower 4, and the inclination angles of the oblique cables 5 and 6 are small.

The bridge girder 3 has a column head horizontal girder (not shown) immediately above the pier 2, and the bridge girder 3 and the pier 2 continuously form a rigid frame structure. And the said main tower 4 is integrally started up on the position in which the column head horizontal girder of the bridge girder 3 was provided.
The bridge girder 3 has a box-shaped cross section made of prestress and concrete, but the structure of the bridge girder 3 is not limited to such a structure, and is a composite structure of concrete and steel. Other types of bridge girders may be used such as a web using a precast plate or a truss structure. Moreover, the box girder etc. which were formed with steel may be sufficient.

FIG. 2 is a side view and a front view of the main tower 4 of the cable-stayed bridge shown in FIG. FIG. 3 is a cross-sectional plan view and a vertical cross-sectional view in the bridge axis direction of the oblique cable fixing portion of the main tower 4.
The main tower 4 includes a leg portion 7 continuously raised from the bridge girder 3 integrated with the pier 2 and a cable fixing portion 8 provided on the leg portion. The first concrete block 11 and the second concrete block 12 to which the oblique cables 5 and 6 are fixed, the two steel plates 13 and 14 provided so as to connect the concrete blocks, and the steel plates 13 and 14 And a tension member 15 for fastening the concrete blocks 11 and 12 to each other.

The leg portion 7 has a reinforced concrete structure, is continuous with the bridge girder 3, and transmits a vertical force acting from the oblique cables 5 and 6 to the pier 2 via the bridge girder 3.
The two concrete blocks 11 and 12 provided in the cable fixing portion 8 are arranged with a gap in the bridge axis direction, and the oblique cable 5 stretched to one side is fixed to the first concrete block 11 and to the other side. The oblique cable 6 to be stretched is fixed to the second concrete block 12. The flat cross-sectional shape of each concrete block 11 and 12 is substantially rectangular, and continuous steel plates 13 and 14 are connected to both sides of the concrete blocks 11 and 12 so as to connect the concrete blocks 11 and 12. It is fixed. That is, the steel plates 13 and 14 are fixed in close contact with a vertical plane substantially parallel to the bridge axis direction of the concrete blocks 11 and 12, and a predetermined range from one end edge in the bridge axis direction is the first concrete block 11. A predetermined range from the other edge is fixed to the second concrete block 12. And such steel plates 13 and 14 are provided on both side surfaces of the concrete blocks 11 and 12, and as shown in FIG. 3 (a), two steel plates 13, 14, the two concrete blocks 11 and 12 arrange | positioned at intervals in the bridge-axis direction are fixed so that it may pinch | interpose.

The diagonal cables 5 and 6 have spaces in which upper ends penetrate the first concrete block 11 or the second concrete block 12 and are surrounded by the two concrete blocks 11 and 12 and the two steel plates 13 and 14. 16 is fixed to the concrete blocks 11 and 12. A pipe member 17 is embedded at a position where the oblique cables 5 and 6 of the concrete blocks 11 and 12 penetrate, and an upper end portion of the oblique cables 5 and 6 is inserted into the pipe member 17 to obtain a predetermined tension force. Is fixed by the fixing tool 18 in a state in which is introduced.
A plurality of the same number of diagonal cables are fixed to each of the first concrete block 11 and the second concrete block 12, and the inclination angle gradually increases from the diagonal cable fixed to the upper stage to the cable fixed to the lower stage. So that it is stretched. The diagonal cable 5 fixed to the first concrete block 11 and the diagonal cable 6 fixed to the second concrete block 12 are each paired, and a steel plate is placed between these pair of diagonal cables. A tensile force is transmitted through

The steel plates 13 and 14 have a thickness of 22 mm and have sufficient strength to transmit the horizontal component of the tensile force of the pair of diagonal cables 5 and 6 to each other. In the vertical direction, as shown in FIGS. 2 (a) and 3 (b), it is divided into a plurality of parts by horizontal dividing lines 19, and one or two or more pairs of diagonal cables 5 are provided in each part. , 6 transmit a tensile force. In the vertical direction, at the boundary between the divided parts, the lower edge of the upper divided part and the upper edge of the lower divided part are opposed to each other but separated, and the vertical force It is not intended to communicate. Therefore, precise processing is not performed on the opposed lower edge and upper edge.
In addition, after each of the divided portions is arranged at a predetermined position, the lower end edge of the upper divided portion and the upper end edge of the lower divided portion may be joined by welding or the like.

  The steel plates 13 and 14 are provided with openings through which the tension members 15 penetrate at predetermined positions, and a plurality of stud dowels 21 as attachment members are attached to the surfaces in close contact with the concrete blocks 11 and 12. By embedding these sitd gibels 21 in the concrete, the steel plates 13 and 14 and the concrete blocks 11 and 12 are firmly fixed so as not to deviate from each other.

The first concrete block 11 and the second concrete block 12 are formed by placing concrete at the site where the main tower 4 is constructed. The concrete blocks 11 and 12 can be formed as follows.
The steel plates 13 and 14 on both sides are installed at predetermined positions, and between them, a rebar embedded in concrete, a sheath through which a tension material is inserted, and a pipe member 17 through which an oblique cable is inserted, and both ends in the bridge axis direction Assemble the formwork that forms the surface. In addition, a mold that forms the fixing surface of the oblique cable is assembled between the two steel plates 13 and 14. The concrete blocks 11 and 12 that are integrated with the steel plates 13 and 14 can be formed by placing concrete in close contact with the steel plates 13 and 14. The concrete is placed so as to be continuous over the upper and lower sides of the dividing line 19 of the steel plates 13 and 14.
In addition, the positioning steel plate joined so that the two steel plates 13 and 14 may be connected can also be used for the formwork which forms the fixing surface of the diagonal cables 5 and 6. The positioning steel plate has a shape corresponding to the fixing surface perpendicular to the axis of the oblique cables 5 and 6 disposed at an inclination, and an opening is provided at the fixing position of the oblique cables 5 and 6, and is placed. A part of the fixing portion is formed integrally with the concrete.

  A steel rod is used as the tension member 15 and penetrates through an opening provided in the steel plates 13 and 14 and a sheath embedded in the concrete block, and both end portions protrude from the side surfaces of the steel plates 13 and 14, respectively. Then, after the concrete placed between the two steel plates 13 and 14 is hardened and becomes concrete blocks 11 and 12 having sufficient strength, a tension force is introduced, and the bearing plates 22 and nuts 23 are used to apply the tension to the steel plates 13 and 14. It has been established. A plurality of tension members 15 are arranged around the positions where the oblique cables 5 and 6 of the concrete blocks 11 and 12 are fixed, and a compressive force is introduced into the concrete blocks 11 and 12 in a state of being nearly equal. Yes.

In such an oblique cable fixing structure, the concrete blocks 11 and 12 to which the oblique cables 5 and 6 are fixed are reinforced by the compressive force introduced by the tension of the tension member 15 and the embedded reinforcing bars, and the steel plate 13. , 14 can transmit the tensile force acting from the oblique cables 5, 6 to the contact portion. Further, the contact portion between the concrete blocks 11 and 12 and the steel plates 13 and 14 is strong both due to the stud gibber 21 as a detent member being embedded in the concrete blocks 11 and 12 and the tension of the tension material 15. By being press-contacted, it is firmly joined and the tensile force acting from the oblique cables 5 and 6 is transmitted. The horizontal component of the tensile force between the diagonal cable 5 fixed to the first concrete block 11 and the diagonal cable 6 fixed to the second concrete block 12 acts on the steel plates 13 and 14 in the opposite direction. As a result, they cancel each other, and no large horizontal force acts on the main tower 4. Further, the vertical component of the tensile force transmitted from the oblique cables 5 and 6 is transmitted downward by the concrete blocks 11 and 12 that are continuous in the vertical direction, and the bridge pier 2 through the bridge girder 3 from the leg 7 of the main tower. The upper part of the main tower to which the oblique cables 5 and 6 are fixed is supported.
On the other hand, since the concrete blocks 11 and 12 to which the oblique cables 5 and 6 are fixed are joined so as to be firmly sandwiched between the two steel plates 13 and 14, a strong structure without increasing the cross-sectional dimension of the cable fixing portion. can do. Further, the shape of the concrete blocks 11 and 12 is simple, and the workability is also good.

In the fixing structure of the oblique cable described above, the stud gibber 21 is used as a displacement preventing member between the concrete blocks 11 and 12 and the steel plates 13 and 14, but other structures can be adopted instead.
FIG. 4 is a plan sectional view and a schematic perspective view showing a fixing structure using another example of the slip prevention member.
This slip prevention member has a rib 31 that is fixed to a surface of the steel plate 13 that is in close contact with the concrete block 11 and extends in the horizontal direction, and a reinforcing bar 32 that is inserted through a through hole 31 a provided in the rib 31. is there. The rib 31 is obtained by welding the long side of a rectangular plate-shaped steel member that is long in the horizontal direction to the steel plate by welding, and through holes 31a are formed at predetermined intervals. Such ribs 31 are provided with a plurality of stages above and below, and the reinforcing bars 32 inserted through the through holes 31 a are inserted so as to be continuous with the through holes 31 a provided in the plurality of stages of ribs 31. The concrete block 11 and the steel plate 13 are firmly integrated by embedding the ribs 31 and the reinforcing bars 32 and placing concrete so as to be in close contact with the steel plate 13. Further, the rigidity of the steel plate 13 is increased by the ribs 31, and when the steel plate 13 is clamped so as to sandwich the concrete block 11 by the plurality of tension members 15 arranged at intervals, the steel plate 13 and the concrete block 11 are The compressive force acts in a wide range between them, and the concrete block 11 is effectively reinforced.

  Instead of the reinforcing bar 32 inserted through the through hole 31a of the rib 31, a steel pipe (not shown) filled with mortar or concrete inside may be used. Although this steel pipe may penetrate the short thing divided | segmented for every rib into a through-hole, it is desirable to make it continuous over several ribs similarly to the said reinforcing bar 31. FIG.

FIG. 5 is a plan sectional view showing an example in which the main tower 4 having the fixing structure of the oblique cable according to the present invention is provided with an exterior.
In the main tower 4 shown in FIG. 2, the fixing portion of the tension member 15 and the side surfaces of the steel plates 13 and 14 are exposed. As a result, the appearance can be improved. For example, as shown in FIG. 5A, the oblique cable fixing structure of the present invention is adopted, and the upper portion of the main tower 4 can be covered with an exterior panel 41. The exterior panel 41 is formed by molding, for example, a coated steel plate material, an aluminum plate, a stainless steel plate, a precast concrete plate or the like into a predetermined size and shape, and attaching them with bolts 42 or the like. Infiltration of rainwater or the like can be prevented by filling joint portions 43 or the like in adjacent portions of the plurality of exterior panels 41.
FIG. 5 (b) shows concrete placed as an exterior portion 44 that covers the fixing portion of the tension member 15 and the outer surfaces of the steel plates 13 and 14. The concrete of the exterior portion 44 is placed so as to embed a stud gibber or the like (not shown) fixed to the outer surface of the steel plates 13 and 14 and is integrated with the steel plates 13 and 14.

FIG. 6 is a plan sectional view showing a fixing structure of an oblique cable according to another embodiment of the present invention.
In the fixing structure, like the fixing structure shown in FIGS. 2 and 3, the first concrete block 61 and the second concrete block 62 to which the oblique cables 55 and 56 are fixed are connected to the concrete blocks. And two tension plates 65 and 64, and tension members 65 for fastening the steel plates 63 and 64 and the concrete blocks 61 and 62 to each other. The two concrete blocks 61 and 62 are arranged with a gap in the direction of the bridge axis, and the oblique cable 55 stretched to one side is fixed to the first concrete block 61 and stretched to the other side. The point that the oblique cable 56 is fixed to the second concrete block 62 is also common.

  On the other hand, in this fixing structure, the outer surfaces of the steel plates 63 and 64 disposed on both sides of the first concrete block 61 and the second concrete block 62 and connected to both the concrete blocks 61 and 62, that is, An outer concrete portion 71 is provided so as to be in close contact with the surface opposite to the surface in close contact with the concrete blocks 61 and 62. This outer concrete 71 part is provided corresponding to the area | region connected with the 1st concrete block 61 and the 2nd concrete block 62 in the bridge-axis direction of the steel plates 63 and 64, and the outer concrete part 71 and the 1st concrete are provided. Steel plates 63 and 64 are formed between the block 61 and the second concrete block 62. The tension material 65 passes through the steel plates 63 and 64 and the concrete blocks 61 and 62 and is fixed to the outer concrete portion 71. Therefore, when a tension force is introduced into the tension member 65 and fixed, the reaction force acts on the outer concrete portion 71 and is widely distributed to press the steel plates 63 and 64 against the concrete blocks 61 and 62. Thereby, the pressing force which acts on the contact surface of both the steel plates 63 and 64 and the concrete blocks 61 and 62 is introduced in a widely distributed state.

  Similar to the first concrete block 61 and the second concrete block 62, a reinforcing bar (not shown) is disposed in the outer concrete portion 71. In addition, a displacement preventing member such as a stud diver is provided in a region where the outer concrete portion 71 of the outer surface of the steel plates 63 and 64 is in close contact, and the outer concrete portion 71 and the steel plates 63 and 64 are integrally coupled. It has become. Further, the fixing portion 65a of the tension material 65 can be embedded with concrete after the introduction of the tension force, and corrosion of the tension material and the fixing tool is prevented.

In addition, this invention is not limited to said embodiment, It can implement as another form within the scope of the present invention.
For example, in the present embodiment, the present invention is applied to an extradosed type cable-stayed bridge. However, the present invention is not limited to an extradosed type cable-stayed bridge. It can also be applied to. In addition, the number of diagonal cables, the angle at which the cables are arranged, and the like can be determined as appropriate, and the shape and dimensions of the main tower can be appropriately designed correspondingly.
Moreover, although the concrete block employ | adopted by the said embodiment was cast in the predetermined position which forms a main tower, it can also be formed with the concrete cast beforehand so that it may become integral with a steel plate. In addition, as the concrete, ultra high strength fiber reinforced concrete (for example, trade names: “Dactal”, “Saxsem”) can be used, and the reinforcing bars arranged in the concrete block can be omitted or reduced.

1: abutment, 2: pier, 3: bridge girder, 4: main tower, 5, 6: diagonal cable, 7: leg of main tower, 8: cable fixing part of main tower,
11, 12: Concrete block, 13, 14: Steel plate, 15: Tensile material, 16: Space surrounded by two concrete blocks and two steel plates, 17: Pipe member, 18: Fixing tool for oblique cable, 19: Steel plate dividing line,
21: Stud gibber, 22: Pressure plate, 23: Nut,
31: a rib, 31a: a through hole provided in the rib, 32: a reinforcing bar,
41: panel for exterior, 42: bolt for fixing the panel for exterior, 43: joint material, 44: exterior part made of concrete,
54: main tower, 55, 56: diagonal cable,
61, 62: Concrete block, 63, 64: Steel plate, 65: Tensile material,
71: Outer concrete part

Claims (4)

A plurality of bridges that are installed on the upper part of the main tower of the cable-stayed bridge and are suspended diagonally downward from the main tower to both one side and the other side in the axial direction of the cable-stayed bridge (hereinafter referred to as the bridge axis direction). The oblique cable fixing structure of
A first concrete block to which an upper end portion of the oblique cable stretched on one side in the bridge axis direction is fixed;
A second concrete block which is provided side by side with the first concrete block at an interval in the bridge axis direction, and an upper end portion of the oblique cable stretched on the other side in the bridge axis direction is fixed;
Two steel plates arranged in close contact with both side surfaces of the first concrete block and the second concrete block and arranged to connect both concrete blocks;
Through the two steel plates and the first concrete block or the second concrete block, a tension force is introduced so that the two steel plates sandwich the first concrete block or the second concrete block. A plurality of tension members to be tightened,
The first concrete block, the second concrete block, and the steel plate are supported on a leg portion of the main tower that is erected on the bridge girder or a pier that supports the bridge girder. Fixing structure of slant cable. Both of the two steel plates are divided into a plurality of parts arranged in the vertical direction,
One or more pairs of the diagonal cable to one side and the diagonal cable to the other side are fixed at a position along each divided portion,
2. The concrete according to claim 1, wherein the first concrete block and the second concrete block are formed by placing concrete so as to continue up and down a boundary of each divided portion of the steel plate. Fixing structure of slant cable. In the region in close contact with the first concrete block and the second concrete block of the steel plate, a slip prevention member is fixed and embedded in the concrete,
The slip prevention member is inserted into a plurality of plate-like ribs fixed so as to protrude from the steel plate, and through holes provided in each of the ribs. The slant cable fixing structure according to claim 1, further comprising: a filled steel pipe. An outer concrete portion is provided so as to be in close contact with the outer surface of the steel plate arranged so as to sandwich the first concrete block and the second concrete block;
The slant cable fixing structure according to any one of claims 1 to 3, wherein the tendon is fixed to the outer concrete portion.

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