JP2002038421A - Erection method of structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contrive work cost reduction and construction period reduction without producing excessive temporary member related cost by enhancing safety without bringing secondary additional load on a structure during the erection work of new provision and repair. SOLUTION: In the erection method of a structure tensed to be mounted on the top part of a tower 2 and supporting a structure element member on a cable 3 connecting both-end anchor member 13 on the anchorage connection fitting 12 of an anchorage 5, the plural same number of cable fixing means 11, 12, 13 provided on each cable fixing part including the top part of the tower 2 and the anchorage 5 of both the ends are provided in same structure, a plurality of the cable fixing means are juxtaposed on the same cable fixing part in arrangement mutually approaching in the vertical direction and the horizontal direction so that a deviation amount is zero or the minimum.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure using a cable as a structural member for supporting a structural element member such as a girder, wherein a plurality of cable fixing means provided at a cable fixing point are provided; By setting the amount of eccentricity to be zero or a minimum amount, it is possible to omit an erecting member during erecting, or to reduce an additional load on the structure, thereby facilitating installation of the structure. The present invention relates to a method of erection of a structure.

[0002]

2. Description of the Related Art A conventional construction method using a suspension bridge in a structure using a cable as a structural member will be described below with reference to FIGS. The suspension bridge is well known,
A pair of left and right cables 3 are respectively extended between the tops of a pair of towers 2 erected on a base 1 realized by an abutment, and both ends are fixed to an anchorage 5, respectively.
A horizontal girder 4 horizontally disposed between the lower portions of the towers 2 is suspended and supported by suspension cables 6 suspended from a pair of cables 3 on the left and right sides.
Reinforcement reduces the number of piers, and
Since the design load is shared by the cable 3, the cross-sectional shape of the horizontal girder 4 can be reduced. For this reason, a feature is provided in which the concentrated load can be dispersed and alleviated by any deformation of the cable 3 and supported.

In the case of a new suspension bridge, the tower 2 laid horizontally on the abutment 1 is raised by a crane or the like (see FIG. 10 (a)) and supported and installed by a stay rope 7 (FIG. 10).
Then, as shown in FIG. 10C, the cables 3 are respectively extended between the tops of the towers 2 and both ends thereof are fixed to the anchorage 5 and installed. Subsequently, a temporary tower 8 and a temporary cable (sometimes using a temporary rope) 9 are installed as shown in FIG.
The floor framing and the suspension cables 6 each having the horizontal girder 4 as an element are installed using the cable crane 10 suspended from the shore, and then the temporary tower 8 and the temporary cables 9 are removed to complete the suspension bridge (FIG. 10 ( E)).

In such a conventional erection method, a fixing member 41 (commonly referred to as a saddle, see FIGS. 11 (a) to 11 (d)) provided at the top of the tower 2 and an anchorage connecting fitting 42 (FIG. 12) (A) and (b)) have a structure in which only the main cable 3 can be fixed.
However, there is a problem that the cost of the temporary members and the cost of the temporary construction are required.

On the other hand, in the case of an existing suspension bridge, when the upper structural member including the cable 3 is damaged due to corrosion and fatigue deterioration, a repair work for replacing the damaged member with a new structural member is performed. With reference to the above, a temporary tower 8 and a temporary cable 9 are temporarily installed, a floor assembly and a suspension cable 6 are temporarily received on the temporary tower 8, and then a damaged member, for example, the existing cable 3 is removed and replaced with a new cable 3. is there.

[0006] In such a conventional repair method, there is a problem that a temporary member cost and a temporary construction cost related to the temporary tower 8 are generated. In addition, in the conventional method, the floor assembly, the suspension cable 6 and the like are temporarily suspended by an existing tower or a temporary member reinforced with an anchoring member added to the anchorage. There was also a problem in that the eccentricity was large, and a secondary additional load was generated, resulting in a disadvantage in terms of strength.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in order to solve such a problem, and therefore, an object of the present invention is to provide a method for constructing a new or refurbished structure. It is an object of the present invention to provide a new construction method of a structure that can increase the safety without causing a secondary additional load and can reduce the construction cost and shorten the construction period without generating excessive temporary member related costs. .

[0008]

According to a first aspect of the present invention, there is provided a girder having a cable mounted on a top of a tower and stretched and having anchor members at both ends connected to anchorage connecting fittings of an anchorage. In the method of erection of a structure used as a structural member for supporting a structural element member such as the above, the cable fixing means provided at each cable fixing point including the anchorage at the top and both ends of the tower is the same for each. A plurality of the same number of cable fixing means are provided at the same cable fixing point, and a plurality of cable fixing means are juxtaposed in the vertical and vertical directions or the horizontal direction in the left and right directions so that the amount of eccentricity is zero or minimal. This is a method of erection of structures.

According to a second aspect of the present invention, there is provided a method for erection of a structure according to the first aspect, wherein a cable fixing means at the top of the tower is provided with a saddle member fixed to the top and a cable for each cable. A fixing member composed of a plurality of pressing plate members which are juxtaposed on the upper surface of the saddle member and fastened by bolting is used for holding, and a semicircle for receiving the cable is provided on the upper surface of the saddle member. Grooves are recessed to extend at positions close to each other on both the left and right sides with respect to a vertical plane parallel to the stretching direction of the cable, and on the lower surface of each holding plate member, each semicircle of the saddle member is provided. A semicircular groove forming a pair with the groove extends to a corresponding position and is recessed.

According to a third aspect of the present invention, there is provided a method for erection of the structure according to the first aspect, wherein the cable fixing means at the top of the tower is fastened to the saddle member and the upper surface thereof by bolting. A fixing member having substantially the same structure as a pair of a holding plate member and vertically stacked and fixed on the top is used, and a semi-circular groove for receiving the cable is formed on the upper surface of each saddle member. A semi-circular groove forming a pair with the semi-circular groove of the saddle member is provided at a corresponding position on the lower surface of each holding plate member so as to extend at a position intersecting with a vertical plane parallel to the stretching direction. It is characterized in that it is configured to extend and be recessed.

According to a fourth aspect of the present invention, there is provided a method for erection of a structure according to the first, second, or third aspect, wherein a plurality of the cable anchoring means in the anchorage have a plurality of projections provided on the anchorage. An anchorage connecting member made of a thick plate material and a fixing member including an eye bar as an anchor member attached to an end of the cable are used.The anchorage connecting member has a structure in which the thick plate material is perpendicular to a plate surface. A plurality of pin holes through which pins used for connecting the eye bar are inserted vertically are provided on the anchorage so as to be opposed to each other in parallel while maintaining an interval at which the eye bar can be inserted. It is characterized in that it is configured to be drilled at predetermined intervals in the direction.

According to a fifth aspect of the present invention, there is provided a method of erection of a structure according to the first, second or third aspect, wherein the cable anchoring means in the anchorage has a thickness protruding from the anchorage. An anchorage connection fitting made of a plate material, an eye bar as the anchor member attached to the cable end, and a relay connection fitting made of a thick plate material for relay connection between the eye bar and the anchorage connection fitting. A fixing member is used, and the anchorage connecting metal fitting is provided on the anchorage with the plate surface vertical, and a pin hole for inserting a connecting pin of the relay connecting metal fitting at a tip end side. Has been drilled,
The thick plate material forms a fan-shaped plate, and a pin hole through which a pin for connecting the anchorage connection fitting is inserted is formed in a main portion of the fan, and a connection of the eye bar is formed in a fan tip portion. A plurality of pin holes through which a plurality of pins are inserted are formed at predetermined intervals.

According to the present invention, since the cable is used as a structural member for supporting a structural element member such as a girder, the cable is erected, so that the load of the structure at the time of erection can be dispersed and relaxed by the cable. It is possible to avoid the shift load.

Further, according to the present invention, since a plurality of the same number of cable fixing means are provided in each cable fixing point with the same structure, a new installation member for the temporary cable is not required. Also, by providing a plurality of cable fixing means at the same cable fixing point so that the amount of eccentricity becomes zero or a minimum amount, the cable fixing means at the time of erection and repair is reduced.
Subsequent load is hardly generated.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a method of erection of a suspended structure according to a first embodiment of the present invention in (a) to (e) in elevation order, and FIG. The main part of the tower in the suspension structure shown in FIG. 1 is shown in (a) as a front view, and the main part of the tower and the anchorage are similarly shown in (b) as a side view. FIG. 3 is a structural view of the tower top in the suspension structure shown in FIG. 1, (a) is a perspective view, (b) is a side view,
(C) is a plan view, and (d) is a front view.
Further, FIG. 4 shows the structure of the cable fixing means of the anchorage in the suspension structure shown in FIG. 1 in (a), a separated perspective view, (b) in a side view, and (c) in a front view. It is.

The erection method according to the present invention shown in FIGS. 1A to 1E is an example in which a suspension bridge, which is a suspension structure, is newly constructed, and the anchorage 5 at the top and both ends of the tower 2 is used. The specific structure of the cable anchoring means at each cable anchoring point including the following will be described later. The cable anchoring means includes two cable bodies of the main cable 3 and the temporary cable 9 similar thereto. The feature lies in that fixing can be performed simultaneously on the anchors 2 and the anchorages 5 at both ends.

A temporary cable 9 is stretched between the anchorages 5 at both ends in a relaxed state, and then the temporary cable 9 is fixed to the top of the tower 2 laid horizontally on the abutment 1. 1 and temporarily fixed (see FIG. 1 (a)). The temporary cable 9 is tensioned with a pulling tool 32 such as a chill hole while raising the tower 2 by a crane or the like (not shown), and both ends of the temporary cable 9 are fixed to the anchorage 5. The tower 2 and the temporary cable 9 are fixed by fixing them to one fixing portion of the member 11 and fixing a predetermined portion of the intermediate portion to the fixing member 11 (see FIG. 1 (b)).

Next, a cable crane 10 is attached to the temporary cable 9 and suspended, and the main cable 3 is stretched between the tops of the towers 2 as shown in FIG. Both end portions are fixed to the anchorage 5 respectively, and a predetermined portion of the intermediate portion is fixed to the fixing member 11 and installed in full scale. Subsequently, using the cable crane 10, a floor group including the horizontal girder 4 as an element and a suspension cable 6 are installed (see FIG. 1 (d)), and then the temporary cable 9 is removed to complete the suspension bridge. (See FIG. 1 (e)).

In the process of the erection method, the temporary cable 9 and the main cable 3 are fixed in parallel to the top of the tower 2 and the concrete anchorage 5, for example, respectively, as shown in FIGS. ), The top of the tower 2 is located at a symmetrical position close to the left and right sides with respect to a vertical plane passing through the center axis of the tower 2 and parallel to the stretching direction of the main cable 3. The anchor is set so that the amount of eccentricity with respect to the central axis becomes a minimum amount, while the anchor member 13 at the end of the main cable 3 in the anchorage 5
(Not shown) is fixed in an up-down relationship such that the amount of eccentricity becomes zero so that, for example, the temporary cable 9 becomes lower in the vertical plane.

An example of the structure of the cable fixing means at the top of the tower 2 will be described below with reference to FIGS. This cable fixing means is formed by one saddle member 14 and two pressing plate members 15. Saddle member 14
Is a pedestal 14 to be fixed to the top of the tower 2 as a base.
A, a pair of legs 14 integrally raised from the base 14A
B, a saddle portion 14C mounted on and integrally fixed to the leg portion 14B. The saddle portion 14C is formed in a curved plate which is gently curved in the axial direction of the main cable 3 and has an upper surface on which the main Two semi-round grooves 16 for receiving the substantially lower half of the cable 3 are parallel to the direction in which the main cable 3 is stretched, including the central axis of the tower 2 when mounted on the top of the tower 2. It is recessed on both left and right sides with respect to the vertical plane so as to extend in the bending direction at symmetrical positions as close as possible due to structural restrictions. In the saddle portion 14C, for example, a total of 16
A plurality of holes for bolt insertion are formed.

On the other hand, the holding plate member 15 is
The saddle portion 14C of the saddle member 14 for holding
The semi-circular groove 17 which is formed in a curved plate corresponding to the above-mentioned and extends in a corresponding position on the lower surface and is recessed. In addition, a total of 16 bolt insertion holes, for example, 4 holes each having a total of 16 bolts are formed at both left and right sides of the semi-circular groove 17 so as to correspond to the respective holes of the saddle portion 14C.

Such a cable fixing means is shown in FIG.
As shown in (a), each pair of semi-circular grooves 16, 17
Each holding plate member 15 is attached to the saddle portion 14C while the main cable 3 and the temporary cable 9 are sandwiched by each other, and the bolt 20 is inserted into each of the bolt insertion holes to tighten the nut. As a result, the saddle member 14
And the holding plate member 15 are fastened to fix predetermined portions of the main cable 3 and the temporary cable 9. At this time, by providing the two semi-circular grooves 16 as close as possible and distributing them to the left and right from the center line of the saddle member 14, the eccentricity of the installed main cable 3 and the provisional cable 9 is minimized. It is possible to hardly generate an additional load.

Next, an example of the structure of the cable fixing means in the anchorage 5 will be described with reference to FIGS. This cable fixing means is formed by an anchorage connection fitting 12 protruding from the anchorage 5 and an anchor member 13 attached to the ends of the main cable 3 and the temporary cable 9. As the anchor member 13, an eye bar having a well-known structure in which a donut plate portion having a pin hole is integrally provided at a tip of a shaft body portion is used. On the other hand, the anchorage connecting fitting 12 has a majority part embedded in the anchorage 5 made of concrete, and a tip end part of the anchorage fitting 5.
Two thick plate materials 21A of the same shape protruding from and protruding from
21B.

The anchorage connecting fitting 12 is composed of two thick plate members 21A and 21B which are arranged in parallel to each other with their plate surfaces arranged vertically so that the donut plate portions of the eye bar 13 can be inserted at an appropriate interval. The projection is provided on the anchorage 5. Further, two pin holes 23 through which the pins 22 used for connecting the eye bar 13 are inserted are formed in the two thick plates 21A and 21B in a pairwise relationship at a predetermined interval in the vertical direction. I have.

Such a cable fixing means is shown in FIG.
As shown in (a) to (c), the eye bar 13 and the thick plates 21A and 21B are connected by pins and assembled.
Each end of the main cable 3 and the temporary cable 9 can be fixed to the anchorage 5. That is, the eye bar 13 of the temporary cable 9 is inserted between the two thick plate members 21A and 21B, and is connected by the pin 22 using the lower pin hole 23, and is fixed by screwing with the nut 24 while fixing. Cable 3
The eye bar 13 is inserted between the two thick plate members 21A and 21B, connected by the pin 22 using the upper pin hole 23, and fixed by screwing with the nut 24. Thus, the main cable 3 and the temporary cable 9 can be simultaneously fixed to the anchorage 5 without using another fixing member. At this time, since the fixing point is in the vertical direction, the amount of eccentricity of each fixing member is, of course, zero or substantially equal to zero.

FIG. 5 is a perspective view showing the structure of the tower top in the suspension structure according to the embodiment of the present invention.
(B) is a plan view, (c) is a front view, and FIG. 6 is a perspective view showing the structure of a cable fixing means of an anchorage in a suspension structure according to an embodiment of the present invention. Indicated by

Referring to FIG. 5, the cable fixing means at the top of the tower according to this embodiment is similar to the cable fixing means shown in FIG. 3, and corresponding members are denoted by the same reference numerals. The individual description is omitted. The configuration characterized by this cable fixing means is the saddle member 1
4 is that the interval between the semi-circular grooves 16 is narrower, and the pressing plate member 15 is correspondingly formed in a split type, that is, the saddle member 14 is on the center side. The holes for bolt insertion in four rows of 2
In order to tighten the two semi-circular grooves 16, two halves are used, and the interval between the semi-circular grooves 16 is compared with the form shown in FIG. It has become more narrow. On the other hand, as the holding plate member 15 for each cable, two holding pieces 15A and B of the same shape are formed respectively, and in order to alternately use the bolt insertion holes of four rows in the center side, As shown in the figure, the saddle members 14 are attached to each other in an alternately staggered arrangement.

Referring to FIG. 6, the cable fixing means of the anchorage 5 according to this embodiment is similar to the cable fixing means shown in FIG. 4, and corresponding members have the same reference numerals. Is attached. The configuration characterized by this cable fixing means is that the anchorage connecting fitting 12 is made of a single thick plate material 21C having substantially the same shape as that of the conventional one, and a relay-shaped connecting piece is made of a fan-shaped plate for connecting the eye bar 13. That is, the connection metal fitting 18 is used.

The anchorage connecting member 12 made of one thick plate material 21C is projected from the anchorage 5 with its plate surface vertical, and the relay connecting member 18 is provided at the tip end side.
One pin hole 27 through which the connecting pin 26 is inserted is formed.

The connecting metal fitting 18 is a fan-shaped plate 2
Formed of a plurality of thick plate materials 25,
One pin hole 28 for inserting the connecting pin 26 of the anchorage connecting fitting 12 is formed on the fan main part side, and the connecting pin 29 of the eye bar 13 is inserted on the fan tip side. In this configuration, two pin holes 30 are formed at predetermined intervals.

As shown in FIG. 6, such a cable fixing means easily fixes each end of the main cable 3 and the temporary cable 9 to the anchorage 5 by using the relay connecting metal 18 as a relay member. be able to. That is, first, the two thick plate members 25 of the relay connection bracket 18 are sandwiched between the thick plate members 21C of the anchorage connection bracket 12 on the main part of the fan, and the pin holes 27 and the pin holes 28 which are aligned with each other are inserted into the pin holes 27. And the nut 31 is screwed into both ends thereof, thereby connecting the anchorage connection fitting 12 and the relay connection fitting 18. Next, the donut-shaped plate portion of the eye bar 13 fixed to the end of the temporary cable 9 is inserted between the two thick plate materials 25 so that the pin hole and the lower pin hole 30 are aligned, and the through hole is formed. Insert pin 29 and insert nuts 3
By screwing 1, the eye bar 13 of the temporary cable 9 is connected to the relay connection fitting 18.

According to the same mounting procedure, the eye bar 13 of the main cable 3 and the connecting metal fitting 18 are connected using the pin hole 30 on the upper side.
Further, each end of the temporary cable 9 can be fixed to the anchorage 5 by the relay connecting metal 18 provided in the form of a joint between both eyes. In the case of this embodiment, it is possible to simultaneously fix the main cable 3 and the temporary cable 9 to the anchorage 5 using the conventional anchorage connection fitting 12 without using another fixing member. At this time, since the fixing point is in the vertical direction, the amount of eccentricity of each fixing member is zero or substantially equal to that of the example shown in FIG.

FIG. 7 shows the structure of the cable fixing means at the tower top in the suspension structure according to the embodiment of the present invention.
(A) is a perspective view, and (B) is a front view.
This embodiment is similar to the embodiment shown in FIG. 3, and corresponding members are denoted by the same reference numerals.

The cable fixing means according to the embodiment shown in FIG. 7 is characterized in that the saddle member and the pressing plate member fastened to the upper surface thereof by bolting are two sets of substantially the same structure. The fixing member is provided in a vertically stacked manner in a stacked manner, whereby a special effect is exhibited particularly in the erection method for replacing the main cable 3.

The above-mentioned cable fixing means is composed of two sets of fixing members having substantially the same structure which are stacked in a vertical arrangement comprising a saddle member 14 and a pressing plate member 15 fastened to the upper surface thereof by bolting. 11, a single semi-circular groove 16 for receiving the main cable 3 is provided on the upper surface of each saddle member 14 through the center axis of the tower 2 in the direction in which the cable 3 is stretched. A single semi-circular groove 17 that is paired with the semi-circular groove 16 of the saddle member 14 is provided on the lower surface of each holding plate member 15 so as to extend and recess at a position intersecting with the parallel vertical surface. It is recessed and extends to the corresponding position.

In this case, as will be apparent from the description of the erection method described later, the cable 3 is removed from the fixing member 11 installed on the lower side from the viewpoint of convenience when replacing the cable 3. Saddle member 1 for ease
A spacer 19 having a predetermined thickness is provided between the holding member 4 and the holding plate member 15.
And a round groove formed by the semi-circular groove 16 and the semi-circular groove 17 is provided with a margin. In the fixing member 11 provided on the lower side, for example, the semi-circular groove 17 provided in the holding plate member 15 is formed to have a cross-sectional shape having a margin like the state where the spacer 19 is interposed. Thus, the spacer 19 can be omitted, and modifications similar to this can be included in the scope of the present invention.

The following is a description of the method of erection for replacing the main cable 3 using such a cable fixing means. In this case, it is assumed that the old main cable 3 in the existing suspension bridge has been fixed by a set of fixing members 11 in the diagram on the right side of FIG.

First, the bolt 20 of the fixing member 11 to which the old main cable 3 has been fixed is removed, and the saddle member 14 and the pressing plate member 15 thereon are separated from each other in the manner shown in FIG. A spacer 19 is interposed therebetween, and the upper saddle member 14 is placed thereon, and temporarily fixed with a long bolt 34 as necessary. Next, the new main cable 3 is placed in the semi-circular groove 16 of the upper saddle member 14, and the holding plate member 15 is put on the semi-circular groove 16, and is fixed by the bolt 34. After that, the old main cable 3 is pulled out from the round groove of the fixing member 11 on the lower side, and thus the erection method related to the repair is completed.

When the above cable fixing means is used, since the cable receiving portion of the fixing member 11 is in a vertical position in the vertical plane including the central axis of the tower 2 when replacing the cable, the eccentricity thereof is zero. Therefore, the secondary load is not generated at all during the replacement work.

FIG. 8 is a perspective view showing an embodiment of a method of erection of a suspension structure according to a second embodiment of the present invention, and FIG. ) To (e) are shown in order by elevation.

With reference to FIGS. 3, 8, and 9, a construction method according to a modification for replacing the main cable 3 will be described below. In this case, it is assumed that the old main cable 3 in the existing suspension bridge shown in FIG. 9A is fixed by the circular groove on the right side of the fixing member 11 in FIG.

From this state, the new main cable 3 on which the temporary suspension cable 35 is suspended is extended, mounted on the top of the tower 2 and stretched, and the anchor members 13 at both ends are connected to the anchorage 5.
For example, at the top of the tower 2, the fixing is performed by the circular groove on the left side of the fixing member 11, while using the pin hole 23 of the anchorage connecting metal fitting 12 shown in FIG. Then, the attachment of the new main cable 3 is completed (see FIG. 9B).

Next, as shown in FIG. 9C, the lower end portion of each temporary suspension cable 35 to which the tension member 33 such as a lever block is attached is connected to a floor set, and each temporary suspension cable 35 is connected with the tension member 33. Strain the new main cable 3 along the old main cable 3.

Subsequently, after each new suspension cable 6 is laid and attached between the new main cable 3 and the floor set, the old suspension cable 6 is removed and removed, and the old main cable 3 is set in a free state ( FIG. 9 (d)).

The old main cable 3 and the respective temporary suspension cables 35 in the free state are removed, and a series of erection methods related to the repair for replacing the main cable 3 are completed as shown in FIG. Since the amount of eccentricity of the cable fixing means at the top of the tower 2 and at the anchorage 5 at the top of the tower 2 and the anchorage 5 is extremely small through this erection method, a secondary additional load hardly occurs and the cable can be easily attached.

[0047]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The embodiment of the present invention relates to a method for erection of a structure comprising a suspension bridge as shown in FIG. 1 and has a bridge length of 50 m and a width of 2 m. The maximum design load to be loaded on the structural floor is a light vehicle, and the concentrated load of the vehicle is 1,
200 kg. At this time, the main cable 3 has a strand rope of φ40 mm, and the suspension cable 6 has a strand rope of φ10 mm. On the other hand, the concrete anchorage 5 for the main cable 3 is a concrete block having a height of 4 m, a width of 4 m, and a length of 7 m.

When a cable is used for supporting a structure as shown in FIG. 1 (e), the cable can follow the deformation even when the floor set is greatly deformed during erection. Also, if a structural member breaks due to corrosion or fatigue, even if it is necessary to replace it with a new structural member, if the new structural member is easily deformed, if the floor set is deformed arbitrarily during construction, it will be deformed. It is possible to build while following.

In order to provide the same number of cable fixing means at each cable fixing point, as shown in FIG.
A plurality of saddle members 14 and two pressing plate members 15 were provided. On the other hand, as shown in FIG. 4, a concrete anchorage 5 was provided with an anchorage connecting fitting 12 made of two steel plates having a thickness of 40 mm. With such a configuration, the main cable 3 can be installed without using a temporary tower as shown in FIGS. Also, as shown in FIG. 8, a new main cable 3 can be stretched and a hanging member can be replaced with a new main cable 3 without using a temporary tower, thereby eliminating the need for a temporary tower or a temporary cable. be able to.

In each of the embodiments described above, the cable fixing means provided at each cable fixing point including the anchorage at the top and both ends of the tower are provided with the same structure and two equal numbers of cable fixing means are provided. According to the present invention, three or more equal number of the cable fixing units may be prepared in the same structure and provided in the same manner as in the above embodiments.

[0051]

According to the first aspect of the present invention,
Since the concentrated load of the structure is distributed by the cable,
It is possible to reduce the number of new load-reducing reinforcing members.
In addition, a temporary tower at the time of erection is not required, and the number of temporary members related thereto is significantly reduced, so that the construction cost can be reduced and the construction period can be shortened. Further, by providing the cable fixing means such that the amount of eccentricity is zero or a minimum amount, the secondary additional load on the structure is reduced, and a new reinforcing member is not required.

According to the second aspect of the present invention, the fixing member provided at the top of the tower can have a simple and compact structure.
In addition, the eccentricity can be minimized to improve the safety of construction. According to the invention of claim 3, the amount of eccentricity can be made zero, which is very suitable especially when replacing the main cable.

According to the fourth and fifth aspects of the present invention, the fixing member at the anchorage portion can have a simple and compact structure, and the eccentricity can be reduced to zero. According to the fifth aspect of the present invention, it is possible to easily realize the method of the present invention by using a conventional anchorage connection fitting.

[Brief description of the drawings]

FIG. 1 is an elevational view showing a method of erection of a suspension structure according to a first embodiment of the present invention in order from (A) to (E).

FIG. 2A is a front view of a main part of a tower in the suspension structure shown in FIG. 1, and FIG. 2B is a side view of the main part of the tower and an anchorage.

FIG. 3 is a structural view of a tower top in the suspension structure shown in FIG. 1, (a) is a perspective view, (b) is a side view, (c) is a plan view, and (d) is a front view.

FIGS. 4A and 4B are structural views of an anchorage cable fixing means in the suspension structure shown in FIG. 1, wherein FIG. 4A is an exploded perspective view, FIG. 4B is a side view, and FIG.

FIG. 5 is a structural view of a tower top in a suspension structure according to an embodiment of the present invention, (A) is a perspective view, (B) is a plan view,
(C) is a front view.

FIG. 6 is an exploded perspective view of an anchorage cable fixing means in the suspension structure according to the embodiment of the present invention.

FIG. 7 is a structural view of a tower top in a hanging structure according to an embodiment of the present invention, wherein (a) is a perspective view when a cable is replaced, and (b) is a front view showing before and after the cable replacement. FIG.

FIG. 8 is a perspective view illustrating an aspect of a method of erection of a suspension structure according to a second embodiment of the present invention.

FIG. 9 is an elevational view showing the method of erection of the suspension structure according to the second embodiment of the present invention in order from (A) to (E).

FIG. 10 is an elevational view showing an example of a conventional method of erection of a suspended structure in order from (A) to (E).

11 is a structural view of the top of the suspension structure shown in FIG. 10, (A) is a perspective view, (B) is a side view, (C) is a plan view, and (D) is a front view.

12 is a structural view of a cable fixing means of an anchorage in the suspension structure shown in FIG. 10, (A) is a separated perspective view, (B) is a side view, and (C) is a front view.

FIG. 13 is a perspective view illustrating another example of the construction method of the conventional suspension structure.

[Explanation of symbols]

1. Base 2. Tower 3. Cable 4. Horizontal girder
5 Anchorage 6 Suspended cable 7 Stay rope 8 Temporary tower
9 ... temporary cable 10 ... cable crane 11 ... fixing member 12 ...
Anchorage connecting bracket 13 ... Anchor member 14 ... Saddle member 14A ...
Base part 14B ... Leg part 14C ... Saddle part 15 ... Holding plate member 16 ... Semi-circular groove 17 ... Semi-circular groove 18 ... Connecting metal fittings 19 ... Spacer
Reference Signs List 20 bolt 21A, B, C thick plate 22 pin 23 pin hole 24 nut 25 thick plate 26 pin 27 pin hole
28 ... Pin hole 29 ... Pin 30 ... Pin hole 31 ... Nut 32 ... Tensioning tool 33 ... Tensioning tool 34 ... Bolt 35 ... Temporary suspension cable 41 ... Fixing member 42 ... Connecting fitting 43 ... Pin hole

Claims (5)

[Claims] A cable having an anchor member at both ends connected to an anchorage connecting fitting of an anchorage is used as a structural member for supporting a structural element member such as a girder. In the method of erection of a structure having the same structure, a plurality of the same number of cable fixing means having the same structure and provided at each cable fixing point including the anchorage at the top and both ends of the tower are provided, and at the same cable fixing point. A method of erection of a structure, wherein a plurality of cable fixing means are juxtaposed in an arrangement vertically adjacent to each other so as to have an eccentricity of zero or a minimum amount in a vertical direction or a horizontal direction. 2. A saddle member fixed to the top as a cable fixing means at the top of the tower, and a plurality of holding plates arranged side by side on the upper surface of the saddle member for holding each cable and fastened by bolting. A fixing member comprising a member and a saddle member is used, and on the upper surface of the saddle member, a semi-circular groove for receiving the cable is closely adjacent to the left and right sides with respect to a vertical plane parallel to the stretching direction of the cable. A semi-circular groove forming a pair with each semi-circular groove of the saddle member is formed on the lower surface of each holding plate member so as to extend and extend to a corresponding position. A method for erection of a structure according to 1. 3. A fixing device having substantially the same structure as a cable fixing means at the top of a tower, which is a set of a saddle member and a pressing plate member fastened to the upper surface thereof by bolting, and which is vertically stacked and fixed on the top. A member is used, and on the upper surface of each saddle member, a semi-circular groove for receiving the cable is recessed so as to extend at a position intersecting a vertical plane parallel to the stretching direction of the cable, On the lower surface of the holding plate member,
2. The method of erection of a structure according to claim 1, wherein a semi-circular groove forming a pair with the semi-circular groove of the saddle member extends to a corresponding position and is recessed. 4. The cable anchoring means in the anchorage includes an anchorage connecting fitting made of a plurality of thick plates protruding from the anchorage and an eye bar as an anchor member attached to an end of the cable. A fixing member is used, and the anchorage connection fitting is provided on the anchorage so that the thick plate is opposed to and parallel to the plate surface with the plate surface being vertical and maintaining an interval at which the eye bar can be inserted. 4. The method according to claim 1, 2 or 3, wherein a plurality of pin holes through which a pin used to connect the eye bar is inserted are formed in the plate at predetermined intervals in a vertical direction. 5. An anchorage connecting fitting made of a thick plate material protruding from the anchorage, an eye bar as the anchor member attached to a cable end, and the eye bar and the anchorage as cable fixing means in the anchorage. A fixing member is used which includes a connecting metal fitting made of a thick plate for relay connecting the connecting metal fitting, and the anchorage connecting metal fitting is provided so as to protrude from the anchorage with a plate surface vertical. A pin hole through which a connecting pin of the relay connection fitting is inserted is formed on the distal end side, and the thick plate material forms a fan-shaped plate. A pin hole for inserting the connecting pin of the college connecting fitting is formed, and a plurality of pin holes for inserting the connecting pin of the eye bar are formed on the fan tip side at predetermined intervals. What The method for erection of a structure according to claim 1, 2 or 3.