JP2859163B2 - Rotary erection method for bridges with high piers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary erection method particularly effective for bridges having high piers such as mountain bridges.

[0002]

2. Description of the Related Art In a method of erection of a superstructure and a substructure of a bridge in which the height of a pier exceeds 10 m, a vent type in which a superstructure is assembled with a crane while supporting a bridge girder with a vent support installed between piers. Crane erection method, vent-type traveler crane erection method and mobile crane assembly method There are the cable crane erection method and the hand erection method that pushes or pulls out the bridge girder with the hand girder attached to the tip of the bridge girder.

[0003]

However, in the conventional construction methods described above, the work efficiency is low because the superstructure such as a bridge girder is horizontally erected after completion of the vertical construction of the pier. In addition, many work yards were required, the construction period was long, and the cost was high.
In addition, as the height of the pier increases, the construction period is extended,
The danger associated with working at height also tended to increase.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to greatly reduce the construction period and the construction cost when installing a bridge having a high pier. It is still another object of the present invention to provide a method of erection of a bridge having a high pier which can significantly reduce work at a high place.

[0005]

According to the present invention, after a pier is constructed at a pier installation position, a bridge girder whose center portion is supported on the pier is vertically assembled along the pier, and this assembling is performed. It is characterized in that the bridge girder is rotated about the upper part of the pier as a fulcrum so as to be horizontally erected. The bridge girder that has been placed in the horizontal direction due to the rotation is slid in the horizontal direction as necessary and fixed at a predetermined position.

For the construction of the piers and the vertical assembly of the bridge girders, a jack-up construction method in which jack-up and addition of unit blocks are sequentially repeated, or a crane construction method by stacking unit blocks is employed.

[0007] The rotation of the bridge girder is performed by a winch and a wire rope by utilizing the height of the pier.

The center of gravity of the bridge girder assembled vertically is set slightly above, and the rotation of the bridge girder is suppressed by a wire rope arranged on the lower side, or the bridge girder is arranged on the upper and lower sides. The bridge girder is rotated by controlling the rotation and rotation with the wire rope.

[0009]

In the above construction, the pier is pre-constructed, the bridge girder is assembled vertically using the completed pier, and then the vertical center of the bridge girder becomes the center of rotation and the winch and the wire. The bridge girder is rotated by the rope, and the bridge is placed horizontally. At the pier installation position, both the pier construction and the bridge girder can be performed, so that the work efficiency is greatly improved and the work space can be minimized.

[0010] Further, since the bridge girder is vertically assembled by the jack-up method or the jib crane method, work at heights can be reduced as compared with the case of assembling the bridge girder in the horizontal direction. Further, if the jack-up method is adopted, Both the pier and bridge girder can be built and assembled on the ground, greatly reducing work at height.

Further, the jack-up equipment or the crane can be shared for the construction of the pier and the assembly of the bridge girder,
The construction cost can be reduced. In addition, the joining work of the bridge girder blocks can be performed in the same posture as the joining work of the pier blocks, thereby improving work efficiency and the like.

The rotation of the bridge girder is performed with the central portion of the bridge girder as a fulcrum, so that it can be easily performed with a winch and a wire rope. Further, since the left and right imbalance weight is small, the rotation control is limited to a small diameter of about the wire. The rotation can be controlled with a wire rope.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention. This is an example of a rotary erection method in which a steel bridge pier is constructed by a jack-up method and a steel bridge girder is assembled by a jack-up method and then rotated and erected in a mountain bridge. FIG. 1 shows an outline of a rotary erection method using a jack-up method according to the present invention.
4 shows a jack-up facility for a pier, FIG. 4 shows a jack-up apparatus, and FIGS. 5 to 8 show a jack-up facility for a bridge girder. 9 and 10 show an example of a bridge according to the present invention.
FIG. 13 shows a rotary erection method using the jack-up method according to the present invention in the order of steps.

As shown in FIGS. 9 and 10, the bridge 1 mainly comprises two high piers 2 having a steel structure and a three-span continuous bridge girder 3 having a steel structure. The high pier 2 is made of a thick steel pipe 4
The book comprises a pillar 2A, a leg 2B, a horizontal structural member 2C, and a diagonal member 2D. The bridge girder 3 is composed of four main girders 3A parallel to the bridge axis direction and a horizontal structure 3B connecting these main girders 3A. After being erected horizontally, a PC floor slab 3C is installed on the main girder 3A. You.

In the bridge 1 having such a configuration, according to the present invention, as shown in FIG.
Using a jack-up stand 11 for the pier with 0
Jack up unit pier block 2- _{n on} the ground
The pier 2 is constructed from the upper part to the lower part on the ground by sequentially repeating the extension. Next, the jack-up device 1 is used while using the pre-constructed pier 2.
The bridge girder 3 is moved along the pier 2 by sequentially repeating the jack-up and extension of the unit bridge girder blocks 3- _n on the ground in the same manner by using the jack-up gantry 12 for bridge girder where 0 is installed and the upper guide support device 13. After assembling in the vertical direction, the bridge girder 3 is rotated in the vertical plane by the winch 70 and the wire rope 71 with the vertical center portion of the bridge girder as the center of rotation, and is placed in the horizontal direction.

The bridge girder 3 is located approximately at the center of the center span.
Each of the partial bridge girders 3-1 and 3-2 is designed so that the central portion thereof is located at the supporting position of each of the piers 2-1 and 2-2. Further, when the vertical assembly of the bridge girder 3 is completed, the center of the bridge girder 3 is designed to be located on the top of the pier 2. Here, the bridge girder 3-2 of the shorter pier is slightly slid in the horizontal direction after the horizontal erection, so that the ends of the bridge girder 3-1 and 3-2 are closed.

The foundation 4 of the pier 2, as shown in FIG. 2, etc. made concrete foundation 4A and piles 4B which supports it, pier foundation portion 2 ₀ is embedded by projecting the upper concrete foundation 4A . After completion of the jack-up piers, the lower portion of the unit pier block 2 _-1 at the top of the pier foundation portion 2 ₀ the pier bottom is joined by welding or the like in the steel pillar 2A. Piers for jacking up the gantry 11 on such a concrete foundation 4A is installed so as to surround the pier foundation portion 2 _0.

As shown in FIGS. 2 and 3, the pier jack-up gantry 11 has a rectangular frame shape in plan view surrounding a rectangular pier 2 in plan view, and has a unit pier block height (lifting). (Stroke) plus a top support portion. A plurality of jack-up devices 10 are installed on the upper surface of the jack-up gantry 11, and a carry-in entrance 14 through which the unit pier block 2- _n can pass is formed on a side surface in the bridge axis direction.

Further, on the base face from the side of the jack-up platform 11 until pier foundation portion 2 _0, are installed support base 16 having a rail 15, the unit pier block 2 _-n is traveling carriage from the side of the jack-up platform 11 through the entrance 14 is carried into the jack-up platform 11, and is capable positioned above the pier foundation portion 2 ₀ by 17.

The jack-up devices 10 are respectively arranged at the positions of the pillars 2A of the jack-up pedestal 11 for bridge piers, and the respective pillars 2A of the unit pier blocks 2- _n are respectively connected via lifting rings 30 to be described later. The unit pier block 2- _n is supported and jacked up with a predetermined lifting stroke.

As shown in FIG. 4, the jack-up device 10 mainly includes a pair of jacks 20 which are installed on the upper surface of a jack-up base 11 so as to be vertically expandable and contractible.
It consists of a lifting rod (step bar) 21 hanging down from this jack 20. The lower ends of the pair of jacks 20 are connected by a lower connecting member 22, and the upper ends are connected by an upper connecting member 23. The lifting rod 21 is located at a central portion between the pair of jacks 20 and penetrates the lower connecting member 22 and the upper connecting member 23 so as to be vertically movable.

Further, the lifting rod 21 has a large number of pin holes 24 formed at equal intervals in the axial direction on the center axis thereof. On the other hand, the lower connecting member 22 and the upper connecting member 23 are provided with a lower clamp pin 25 and an upper clamp pin 26 so as to be able to be inserted into and removed from the pin hole 24, respectively. Thereby, the lifting rod 21 can be fixed to the lower connecting member 22 or the upper connecting member 23. These pins 25 and 26 can be automatically inserted and removed by a pin attaching / detaching cylinder 27.

Such a jack-up device 10 includes:
A pair of jacks 20 and a pin attaching / detaching moving cylinder 27
Lift hydraulic unit and control panel 2 for driving and controlling the machine
8 (see FIG. 2), and the jack-up device 10 is operated by the lift-up hydraulic unit / control panel 28 as follows.

When the upper clamp pin 26 is inserted into the pin hole 24 while the pair of jacks 20 are contracted, and the pair of jacks 20 are extended, the upper connecting member 23 and the lifting rod 21 rise, and then the lower clamp When the pin 25 is inserted into the pin hole 24 and the upper clamp pin 26 is pulled out from the pin hole 24 to contract the pair of jacks 20, only the upper connecting member 23 is lowered. By repeating the above, the lifting rod 21 is lifted in a measuring manner. The same procedure can be used for lowering.

The lower part of the lifting rod 21 is
As shown in FIG. 2 and FIG.
0 is detachably connected to the upper and lower parts of the unit pier block 2- _n . The lifting ring 30 is a rectangular frame having a shape surrounding the unit pier block 2- _{n in} plan view, and is attached to the connection piece 31 protruding from the outer surface of the box column 2A and the inner surface of the lifting ring 30. The bracket 32 is connected to the unit pier block 2- _n by bolts (see FIG. 3).

As shown in FIG. 3, brackets 30a are integrally formed on the outer surfaces of the lifting rings 30 at positions corresponding to the lifting rods 21, respectively.
The lifting rod 21 is connected to the bracket 30a. If the lifting rings 30 are attached to the upper and lower portions of the unit pier block 2- _n , and the jack-up devices 10 are driven synchronously, the unit pier block 2- _n rises in a tapered manner. Further, on the outer surface of the lifting ring 30 of the upper and lower stages, a plurality of guide rollers 34 in contact with the guide rail 35 erected on the inner side of the jack-up platform 11 is rotatably mounted, the unit piers raised blocks 2 _- Guides and supports _n .

A load cell 33 (see FIG. 2) is provided between each jack-up device 10 and the jack-up stand 11.
To detect the suspended load of the jack-up device 10. Each jack-up device 10 is controlled by the lift-up hydraulic unit / control panel 28 based on this detection signal. Thereby, the pier 2 can be safely jacked up.

Next, for jacking up the bridge girder 3, FIG.
As shown in FIG. 1, a jack-up gantry 12 for bridge girders and an upper guide support device 13 are used. The jack-up gantry 12 for the bridge girder is installed on the side of the pier 2 in the bridge axis direction by using the lower part of the pier 2 already constructed. Two pillar portions 2A on one side of the pier 2 are used as pillars of the jack-up gantry 1 for the bridge girder. The upper guide support device 13 is attached to the pier 2B so as to protrude horizontally from the pier 2B of the pier 2 and to be located above the jack-up gantry 12 for the bridge girder.

The jack-up pedestal 12 for the bridge girder is, like the bridge pier, a loading port 4 through which the unit bridge girder block 3- _n can pass.
0 is formed, and the unit bridge girder block 3- _n is carried into the bridge girder jack-up stand 12 by the traveling carriage 42 traveling on the rail 41.

As shown in FIGS. 5 and 6, a plurality of jack-up devices 10 are used on the upper surface of the jack-up rack 12 for bridge girders. The jack 20 is disposed at the position of the main girder 3A at both ends in the direction perpendicular to the bridge axis, and the lower end of the lifting rod 21 is
It is directly connected to the main girder 3A via a connection bracket 45. At the lower end of the lifting rod 21, a load cell 46 is interposed to detect the lifting load of the jack-up device 10 as in the case of the pier, and the jack-up device 10 is controlled by the lift-up hydraulic unit / control panel 28. I do.

As shown in FIG. 7B, a plurality of guide rollers 4 are provided on the upper part of the jack-up stand 12 for the bridge girder.
7 is installed to guide and support the ascending bridge girder 3. The guide roller 47 is composed of a roller that rolls on the outer surface of the flange of each main girder 3A and a roller that comes into contact with the end surface of the flange.

As shown in FIG. 7A, the upper guide and support device 13 has a frame 50 having a shape surrounding the cross section of the bridge girder 3.
And a plurality of guide rollers 51 installed on the frame 50. The guide roller 51 is a guide roller 47
In the same manner as described above, the main girder 3A is composed of a roller that rolls on the outer surface of the flange and a roller that comes into contact with the end surface of the flange.

The frame 5 of the upper guide and support device 13
As shown in FIGS. 7 and 8, a fulcrum pin 60 for rotating the bridge girder 3 is installed on 0. The fulcrum pins 60 are attached to a support bracket 61, and a plurality of the fulcrum pins 60 are provided so as to face each main girder 3A. On the other hand, on the bridge girder 3 side, a connecting bracket 62 is protrudingly provided at the end of each main girder 3A on the fulcrum pin side. A position at the center of the bridge girder 3 in the bridge girder direction in the main girder 3A is reinforced by a stiffener, and the connecting bracket 62 is attached to this position. When the vertical assembly of the bridge girder 3 is completed, the connecting bracket 62
Is attached and connected to the support bracket 61 of the frame body 50 via the fulcrum pin 60. As a result, the assembled bridge girder 3 is supported rotatably in the vertical direction.

In order to rotate the bridge girder 3 as shown in FIG. 1 or FIG.
1 is used. In the case of FIG. 1, a winch 70A for rotational drive is installed on the abutment 5, and a winch 70B for rotation suppression is installed on the foundation 4 of the pier 3. The wire ropes 71A and 71B are connected to the bridge girder 3 after fixing one end, for example.
Around the sheaves 72A and 72B attached to both ends of the. The side span side of the bridge girder 3 is rotated down by the winch 70A, and the rotation rise of the center span side is suppressed by the winch 70B.

In the case of FIG. 13, a winch 70C is installed on the ground at an intermediate portion between the center spans, and a wire rope 71C having one end fixed to the center span side end of the bridge girder 3 is towed, thereby obtaining the center. The span side is rotated upward, and after rising to some extent, a winch 70D and a wire rope 71D are added to suppress the rotational rise.

A load cell (not shown) is interposed between the bridge girder 3 and the wire rope 71, and the wire rope 7
1 is detected. The winch 70 is controlled by the control device based on the tension detection signal, so that the rotation control of the bridge girder 3 is performed in a state where a predetermined tension is applied to the wire rope 71.

In the above configuration, the bridge is erected as follows in accordance with the flowchart of FIG. 11 (see FIGS. 12 and 13).

(1) As shown in FIG.
The foundations 4 are built at the installation positions of the piers, and the jack-up pedestals 11 for piers are assembled on the respective foundations 4. The jack-up device 10 is installed on the pier jack-up gantry 11.

[0039] (2) by the traveling carriage 17 units pier block 2 _-5 uppermost loaded into the piers jack-up platform 11, connecting the lifting ring 30 of the lift-up device 10 in units of the pier block 2 _-5 , Rise by the height of the unit pier block. The lower unit pier block 2 _-4 is carried into the lower part of the raised unit pier block 2 _{-5 by} the traveling trolley 17, and the lower part of the unit pier block 2 _-5 and the unit pier block 2 are transported.
_-4 is welded or bolted to the upper part of the column by the pillar 2A.
The lifting ring 30 which is connected to the unit piers block 2 _-5 is lowered to connect the bottom of the unit pier block 2 _-4. Thereafter, ascending by one block height, carrying in the next unit pier block, joining the upper and lower blocks, and connecting the lifting ring to the lower block are sequentially repeated.

(3) The pier 2 is constructed from the upper part to the lower part,
When the unit pier block 2 _-1 lowermost is carried on pier foundation portion 2 _0, after welding or bolting the units pier blocks _2-2 at the top and bottom units pier block 2 _-1,
Slightly lowered by welding or bolting the lower portion of the bottom unit pier block 2 _-1 at the top of the pier foundation portion 2 _0. Thus, the pier 2 is completed as shown in FIG.

(4) As shown in FIG. 12 (iii), the jack-up gantry 11 for bridge piers is dismantled and removed, and the jack-up gantry 12 for bridge girders is assembled. The jack-up device 10 is installed on the upper surface of the bridge girder jack-up gantry 12, and, like a pier, is raised by one block height, the next unit girder block is carried in, the upper and lower blocks are joined, and the lower block is lifted. The bridge girder 3 is assembled by sequentially repeating the connection of the rods.

(5) As shown in FIG. 13 (i), the bridge girder 3 is supported by the jack girder for bridge girder 12 and the upper guide support device 13 in an assembled state, and is supported by the pier 2. The center of bridge girder 3 and the top 2B of pier 2
Are connected via a fulcrum pin 60.

(6) As shown in FIG.
In this state, the jack-up gantry 12 for bridge girder and the upper guide support device 13 are disassembled and removed. To a horizontal erection state. As shown in FIG. 13 (ii), the bridge girder 3-1 of the longer pier becomes a regular erection position in a horizontal state,
It is supported on the pier 2-1 and the abutment 5 via a supporting device. The bridge girder 3-2 of the shorter pier is provided with a slide roller 80 between its center and the upper surface of the pier 2, and is slid toward the bridge girder 3-1 by a hydraulic jack 81 for sliding provided on the abutment 5 side. And close the ends together. The closed end is welded or bolted to form a continuous girder, a PC floor slab 3C or the like is installed, the wire rope 71 is removed, and the bridge 1 is completed as shown in FIG. 13 (iii).

Next, FIG. 14 shows an example in which the pier 2 and the bridge girder 3 are both constructed and assembled by the jib crane method. The bridge is erected as follows.

(1) A jib crane 100 is set up on the foundation 4 of the pier 2 in advance, and the unit pier blocks 2 _-1 , 2 _-2 are stacked in order using this jib crane and welded or joined by bolts or the like. Then, build the bridge pier from bottom to top. (2) Jib crane 100 on the pier 2
01 is supported via a high crane heights by replenishing-JiNoboru mast unit bridge beam block 3 _-1, 3 _-2
… Are assembled in order from the bottom. At this time, the lower unit bridge girder block is supported by the pier 2 via the stay 102. The subsequent steps are the same as the jack-up method described above.

In the case of the rotary erection method using the jack-up method or the jib crane method as described above, and a pier and a bridge girder having a steel structure, the construction cost is lower than the conventional method using a combination of a concrete pier and a PC bridge. 10-15
% And the site construction period is expected to be reduced by 40-50%.

Although the above description has been given of a mountain bridge, the present invention is not limited to this, and a continuous girder having a certain height may be used.
The present invention can be applied to any terrain capable of rotating this continuous girder. The pier height can be applied to about 50 to 120 m. In addition, we explained steel piers,
The present invention can be applied to a case where a bridge pier is constructed by stacking concrete blocks.

[0048]

According to the present invention, there is provided a method for erection and rotation of a bridge,
With the above configuration, the following effects can be obtained.

(1) The pier is pre-constructed, the pier is assembled vertically using the pier that has been completed, and then the pier is rotated by a winch and a wire rope so that the pier is horizontally installed. In this case, both the construction of the bridge pier and the assembly of the bridge girder can be performed, the work efficiency can be greatly improved, and the construction period can be significantly reduced. In addition, the working space and construction road can be significantly reduced as compared with the conventional construction method.

(2) Since the bridge girder is vertically assembled by the jack-up method or the jib crane method, work at heights can be reduced as compared with the case of assembling the bridge girder in the horizontal direction. Both the pier and the bridge girder can be built and assembled on the ground, greatly reducing work at heights.
Work can be speeded up, and safe erection work can be performed.

(3) The jack-up equipment or the crane can be used for the pier and the bridge girder, so that the equipment cost can be reduced, and the construction time can be reduced and the work space can be reduced. Can be planned.

(4) The joining work of the bridge girder blocks can be performed in the same posture as the joining work of the pier blocks, which facilitates the work and improves the work efficiency. Further, in the case of welding and joining, since the work is performed in the same posture, improvement in welding quality and the like can be achieved.

(5) Since the rotation of the bridge girder is performed using the central portion of the bridge girder as a fulcrum, the bridge girder can be easily performed with a winch and a wire rope. Also, since the left and right imbalance weights are small, the rotation control is restricted by a wire The rotation can be controlled with a small-sized wire rope.

[Brief description of the drawings]

FIG. 1 is a side view schematically showing a rotary erection method using a jack-up method according to the present invention.

FIG. 2A is a side view and FIG. 2B is a front view showing the jack-up equipment for a pier according to the present invention.

FIG. 3 is a sectional view taken along line III-III in FIG.

4A is a front view showing a jack-up device, FIG.
(B) is a side view.

FIG. 5 is a side view showing a jack-up facility for a bridge girder according to the present invention.

FIG. 6 is a front view showing a jack-up facility for a bridge girder according to the present invention.

FIG. 7 is a sectional view taken along line VII-VII in FIG. 5;

8 is a partial enlarged view of the upper guide support device in FIG. 7A, FIG. 8A is a plan view, and FIG. 8B is a side view.

FIG. 9 is a side view showing a structural example of a bridge according to the present invention.

FIG. 10 shows an example of the structure of a pier according to the present invention, and (a)
Is a side view, and (b) is a front view.

FIG. 11 is a flowchart of a jack-up rotary erection method according to the present invention.

FIG. 12 is a side view showing a jack-up rotary erection method (1) according to the present invention in the order of steps.

FIG. 13 is a side view showing a jack-up rotary erection method (2) according to the present invention in the order of steps.

FIG. 14 is a side view schematically showing a rotary erection method using a crane according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Bridge, 2 ... Bridge pier, 2A ... Pillar part, 2B ... Leg top part, 2
C: horizontal structure, 2D: diagonal, 2- _n : unit pier block,
3 bridge girder, 3A main girder, 3B horizontal structure, 3C PC floor slab,
3- _n : Unit bridge girder block, 4: Foundation, 4A: Concrete foundation, 4B: Pile, 5: Abutment, 10: Jack-up device, 11: Jack-up pier for bridge pier, 12: Jack-up gantry for bridge girder, 13 ... Upper part Guide support device, 14 ... Carriage entrance, 15 ... Rail, 16 ... Support base, 17 ... Traveling trolley,
Reference Signs List 20 jack, 21 lifting rod, 22 lower connecting member, 23 upper connecting member, 24 pinhole, 25 lower clamp pin, 26 upper clamp pin, 28 lift-up hydraulic unit / control panel, 30 … Lifting ring, 33… load detection load cell, 34… guide roller,
46: load cell for load detection, 47: guide roller, 51
... guide roller, 60 ... fulcrum pin, 70 ... winch, 71
... wire rope, 72 ... sheave, 80 ... slide roller, 81 ... hydraulic jack for slide, 100 ... jib crane, 101, 102 ... stay.

Continued on the front page (73) Patent holder 000002118 Sumitomo Metal Industries Co., Ltd. 4-33, Kitahama, Chuo-ku, Osaka-shi, Osaka (73) Patent holder 000001199 Kobe Steel, Ltd. 1 Wakihama-cho, Chuo-ku, Kobe-shi, Hyogo Chome 3-18 (72) Inventor Koji Ota 2-6-1-3 Otemachi, Chiyoda-ku, Tokyo Inside Nippon Steel Corporation (72) Inventor Hiromichi Anami 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel (72) Inventor Takashi Okamoto 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Osamu Hashimoto Inventor 2-2-2 Uchisaiwaicho, Chiyoda-ku, Tokyo Kawasaki Steel Incorporated (72) Inventor Mamoru Izawa 4-5-33 Kitahama, Chuo-ku, Osaka-shi, Osaka Sumitomo Metal Industries, Ltd. (72) Inventor Yoichi Kobayashi 4-5-33 Kitahama, Chuo-ku, Osaka-shi, Osaka Sumitomo Metal Industry Co., Ltd. (72) Inventor Shinon Aono 1-3-1 Wakihama-cho, Chuo-ku, Kobe City, Hyogo Prefecture No. 8 Inside Kobe Steel, Ltd. (72) Inventor Keiichi Amamori 6-2-10 Ginza, Chuo-ku, Tokyo Inside Tomoe Corporation (72) Inventor Noboru Isabata 3-4-5 Toyosu, Koto-ku, Tokyo Stock Company Tomoe Giken (56) References JP-A-3-84105 (JP, A) JP-A-8-189010 (JP, A) JP-A-63-189505 (JP, A) JP-A-4-353105 (JP, A A) JP-A-6-49809 (JP, A) JP-A-8-311818 (JP, A) JP-A-4-237773 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name ) E01D 21/00 E01D 2/00

Claims (6)

(57) [Claims] After a pier is constructed at a pier installation position, a bridge girder having a central portion supported on the pier is vertically assembled along the pier, and the assembled pier is used as a fulcrum with the upper part of the pier as a fulcrum. A method for erection of a bridge having a high pier by rotating the pier in a horizontal direction. 2. The rotary erection method for a bridge having a high pier according to claim 1, wherein the pier is constructed by a jack-up method in which jack-up and extension of a unit pier block are sequentially repeated on the ground. Construction method. 3. The rotary erection method according to claim 1, wherein the pier is constructed by a crane method by stacking unit pier blocks. 4. The rotary erection method according to claim 1, wherein the bridge girder is assembled by a jack-up construction method in which jack-up and addition of a unit bridge girder block are sequentially repeated on the ground. Rotary erection method for bridges with legs. 5. The rotary erection method according to claim 1, wherein the bridge girder is assembled by a crane method by stacking unit bridge girder blocks. . 6. A high pier according to claim 1, wherein the bridge girder is rotated by a wire rope and a winch. A method of rotating erection of bridges.