JP2006104709A - Pier and construction method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pier which can be constructed in a short period of time, and a construction method of the pier. <P>SOLUTION: Firstly, an abutment 7 is constructed on one bank, and three main girders 4a about twice longer than a span are elongated in a river crossing direction from the abutment 7 in such a manner that the abutment 7 serves as a base point. Next, a material guiding girder 2a is temporarily held in the central section of the main girder 4a (refer to Fig. 6(a)). Subsequently, after the temporarily held girder 2a is fixed, a material guiding girder 2b is temporarily held at the leading end of the main girder 4a, and fixed. Two main girders 4b about twice longer than the span are further elongated in the river crossing direction from the girder 2a in such a manner as to lay astride the girder 2b. A material guiding girder 2c is temporarily held at the leading end of the main girder 4b (refer to Fig. 6(c)). After that, the above operations are repeated. This enables the pier to be constructed in a short period of time. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a jetty and a construction method thereof.

Conventionally, various temporary piers are used in rivers and valleys. For example, when construction is performed on the opposite shore in a river, a temporary pier is constructed as a temporary bridge. And the construction on the opposite shore is smoothly performed by using the temporary pier. This type of temporary pier is described in Patent Document 1.
JP 2001-115421 A

  In the construction of the temporary pier, first, a plurality of beams are projected from the base of the temporary pier in the direction of the temporary pier. Then, temporary piles are placed at the tip portions of the overhanging beams, and the beams are supported by the upper ends of the placed temporary piles. Next, a plurality of pillars are driven using each supported beam as a base, and a horizontal girder, a bracelet, a main girder, a lining plate, etc. are attached to the upper part of each pillar. And each beam is sent out in the construction direction of the temporary pier, and then the above steps are repeated to construct the temporary pier.

By the way, since a temporary pier is constructed as a temporary bridge and construction is performed using the temporary pier, construction or the like cannot be performed unless the temporary pier is constructed. Therefore, it is desirable that the temporary pier be constructed in a short period of time.
However, in the construction of the above-mentioned temporary pier, since beams and temporary piles are used, the number of processes is increased, and as a result, the period until the construction is increased.

  The present invention has been made based on such a background, and an object thereof is to provide a pier that can be constructed in a short period of time and a construction method therefor.

  The invention described in claim 1 for achieving the above object comprises a plurality of conductive girders (2) provided parallel to a direction orthogonal to the erection direction and at a predetermined interval in the erection direction, The upper part is fixed to the conductive material girder so as to support the conductive material girder, and the lower part is spanned between a plurality of steel piles (3) driven into the ground and between the conductive material girder and the conductive material girder. A main girder (4) extending in the erection direction, and the guide girder is an upper girder (21) connected in parallel with a gap through which the two steel pipes (211) can be inserted. The steel pile is inserted vertically downward from the gap between two channel steels constituting the upper girder of the conductive material girder, the lower part is driven into the ground, and the upper part is against the upper girder The pier (1) is fixed so as not to move up and down.

The invention according to claim 2 is characterized in that the conductive material beam (2) includes an auxiliary beam (22) extending in parallel with the upper beam below the upper beam (21), the upper beam and the auxiliary beam. The pier (1) according to claim 1, further comprising a plurality of braces (23) to be connected, wherein the steel pile (3) is inserted via the auxiliary girder.
The alphanumeric characters in parentheses represent corresponding components in the embodiments described later. The same applies hereinafter.

According to these structures, the pier is provided with the conducting material girder, and the conducting material girder has the upper girder, the auxiliary girder, and the breath. For example, if a conducting girder is assembled in advance in a factory and the conducting girder is used in the field, the steps for constructing the pier can be reduced, and the pier can be constructed in a short period of time.
Invention of Claim 3 is a method of constructing a pier (1) using a conducting material girder (2), Comprising: As for the said conducting material girder, two channel steels (211) are steel piles (3 ) With the upper girder (21) connected in parallel with a gap for inserting the first main girder (4a) in the erection direction from the abutment (7) provided at the base of the pier. Temporarily hold the tip side with a temporary pile, and temporarily hold the first guide beam (2a) provided parallel to the direction perpendicular to the erection direction at the substantially central portion of the first main beam in the horizontal direction. After inserting the steel pile vertically downward from the gap between the two channel steels constituting the upper girder of the first conducting girder temporarily held above, and driving the lower part of the inserted steel pile into the ground, The upper part is fixed to the upper girder, and a second conductor girder (2b) fixed by a steel pile is attached to the tip of the first main girder in the same manner as described above. The second main girder (4b) extending across the second conducting girder supported by the steel pile and extending from the first conducting girder further forward in the erection direction is attached. The construction method of the jetty is characterized in that a plurality of conducting girders (2c, 2d) are sequentially attached in the same procedure as the conducting girders.

According to a fourth aspect of the present invention, the guide beam (2) includes an auxiliary girder (22) extending in parallel with the upper girder below the upper girder (21), the upper girder and the auxiliary girder. It has a plurality of braces (23) to connect, and the steel pile (3) is inserted through the auxiliary girder, The construction method of the pier (1) according to claim 3 characterized by things.
According to these methods, the pier can be constructed in a short period of time. For example, if a conductor girder is assembled in advance in a factory and the conductor girder is used in the field, the steps for constructing a pier can be reduced.

Further, since the main girder is extended forward in the erection direction so as to straddle the conductive material girder, the number of main girder used for the pier is reduced, and the pier can be constructed in a shorter period of time.
In addition, since the guide girders are fixed after being temporarily held at the tip of the main girder, it is possible to shorten the time from temporarily holding the guide girders until they are fixed, and the construction period of the entire pier Can be shortened.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a plan view showing a pier 1 according to an embodiment of the present invention, FIG. 2 is a view seen in the direction of arrow A in FIG. 1, and FIG. 3 is a view seen in the direction of arrow B in FIG. It is.
The pier 1 is constructed so as to cross the river, and the installation direction is the river crossing direction, and the direction perpendicular to the installation direction is the river flow direction.

  The pier 1 includes a plurality of conductor girders 2 that extend in parallel to the river flow and are provided at regular intervals in the river transverse direction, and a plurality of steel piles that support the respective conductor girders 2. 3, a plurality of main girders 4 extending in the cross-river direction spanning between the respective guide girders 2, and extending on the main girders 4 so as to extend parallel to the river flow and straddle the main girders 4 A plurality of horizontal girders 5 and a plurality of lining plates 6 laid on each of the cross girders 5 are provided.

FIG. 4 is a diagram showing in detail the configuration of the conductive material beam 2, and FIG. 4A is a plan view of the conductive material beam 2. 4B is a diagram viewed in the direction of arrow C in FIG. 4A, and FIG. 4C is a diagram viewed in the direction of arrow D in FIG. 4B.
The conductive material girder 2 includes a long upper girder 21, a long auxiliary girder 22 extending below the upper girder 21 in parallel with the upper girder 21, and a plurality of connecting the upper girder 21 and the auxiliary girder 22. The breath 23 is provided.

FIG. 5 is a perspective view showing a part of the upper girder 21 in detail, and shows the joining state between the channel steel 211 and the partition member 212 in detail.
The upper girder 21 includes a pair of elongated steel bars 211 extending parallel to each other, and a plurality of partition members disposed between the pair of channel steels 211 and joined to the respective steel grooves 211. 212.

The grooved steel 211 is a member having a substantially U-shaped cross section, a substantially rectangular plate-shaped main surface 211a, and a pair of flanges that protrude from both ends in the width direction of the main surface 211a in a direction orthogonal to the main surface 211a. 211b.
The partition member 212 is a member having a substantially I-shaped cross section, and has a substantially rectangular main surface 212a orthogonal to the main surface 211a of the channel steel 211, and both ends of the main surface 212a so as to be orthogonal to the main surface 212a. And a pair of flanges 212b provided.

  The pair of channel steels 211 are parallel to each other so that their flanges 211b face outward and their main surfaces 211a face each other. The flange 212b of each partition member 212 is in close contact with the inner surface of the main surface 211a of each channel steel 211, and the main surface 211a and the flange 212b are fixed with bolts, nuts, etc. Each partition member 212 is fixed.

  The partition member 212 is paired with two partition members 212 in the longitudinal direction of the upper girder 21 at a predetermined interval, and the space between them is an insertion space 213 into which the steel pile 3 can be inserted. Six pairs of partition members 212 are arranged at a predetermined interval in the longitudinal direction of the upper beam 21. Thereby, six insertion spaces 213 are formed at predetermined intervals in the longitudinal direction of the main beam 21 (see FIG. 4).

Referring again to FIG. 4, the auxiliary girder 22 is provided with a pair of elongated auxiliary steels 221 extending in the longitudinal direction of the conductive material girder 2.
The auxiliary steel 221 has a substantially L-shaped cross section and has substantially the same length as the upper girder 21. The pair of auxiliary beams 221 are opposed to each other with a predetermined interval.
And the auxiliary girder 22 also has the structure for fixing the steel pile 3 inserted and the insertion space of the steel pile 3 substantially the same as the upper girder 21.

  The brace 23 is a longitudinal bar-like member, and two braces 23 are combined in an X shape to form a pair, and the upper part of the paired brace 23 is formed of one channel steel 211 of the upper girder 21. It is joined to the lower end, and its lower part is joined to the upper end of one auxiliary steel 221 of the auxiliary girder 22, thereby connecting one channel steel 211 and one auxiliary steel 221. In the longitudinal direction of the conductive material beam 2, five pairs of breaths 23 are arranged at predetermined intervals.

  Although not shown in FIG. 4B, similarly, the upper part of the paired brace 23 is joined to the lower end of the other grooved steel 211 of the upper girder 21 and the lower part is the other of the auxiliary girder 22. By joining to the upper end of the auxiliary steel 221, the other channel steel 211 and the other auxiliary steel 221 are connected. In the longitudinal direction of the conductive material beam 2, five pairs of breaths 23 are arranged at predetermined intervals. That is, the conducting material girder 2 has a truss structure.

In addition, the conducting material girder 2 has a length of about 12 m or less and a height of about 2.4 m or less, for example.
Again referring to FIGS. 1 to 3, for example, H-section steel is used for the steel pile 3. And the steel pile 3 is inserted in the six insertion spaces 213 of each conducting material girder 2, respectively. The steel pile 3 inserted into the insertion space 213 of the guide girder 2 has its upper part fixed to the upper girder 21 and auxiliary girder 22 by a pile fixing device 55 described later, and its lower part is driven into the river bottom. Yes. Thereby, each conducting material girder 2 is supported at a predetermined height by the steel pile 3.

For example, H-shaped steel is used for the main girder 4, and five main girders 4 are spanned and fixed between the conductive material girders 2. Although not shown in FIG. 1 to FIG. 3, the main girder 4 spanned between the respective conducting girders 2 has a length between the conducting girders 2 serving as a span, as will be described later. Is almost twice as long.
For the cross beam 5, for example, H-section steel is used. Further, the horizontal beam 5 is arranged on each main beam 4 so as to be substantially parallel to the flow of the river, and is fixed to each main beam 4. A plurality of cross beams 5 are arranged at predetermined intervals in the crossing direction of the river.

The lining plate 6 has a substantially rectangular shape in plan view, and a plurality of lining plates 6 are spread on the cross beam 5. The upper surface of the lining plate 6 is the road surface of the pier 1.
FIG. 6 is a diagram schematically illustrating the construction procedure of the pier 1. 7, 8, and 9 are views specifically showing how to use the crane 53, and (a) is a side view and (b) is a plan view, respectively. Hereinafter, the construction method of the pier 1 will be described with reference to FIGS. In FIG. 6, the back side is assumed to be the front, the front side is assumed to be the rear, and in FIGS. 7 to 9, the left side is assumed to be the rear and the right side is assumed to be the front.

First, the conductive material beam 2 is assembled in advance at a factory, for example. And the assembled conducting material girder 2 is conveyed to the spot. At the site, the pier 1 is stretched from one shore to the other shore so as to cross the river. Specifically, first, an abutment 7 is constructed on one bank.
And the temporary pile 51 is driven in the cross direction front of a river. Next, the temporary pile 51 is provided with a temporary receiving material 52 that can receive the main girder 4. Next, the crane 53 crosses the river from the abutment 7 to the three main girders 4 (hereinafter, the main girder 4 is referred to as the main girder 4a) having a length approximately twice as long as the span. It extends in the direction and hangs on the temporary receiving material 52.

  After that, a conducting material girder temporary holding member 54 is provided at the center of the three main girders 4a, and the conducting material girder temporary holding member 54 provides a conducting material girder 2 (hereinafter this conducting girder 2 is referred to as a conducting material girder 2a. Is temporarily held so as to maintain the horizontal state (see FIG. 7A). In this state, the guide beam 2a is arranged such that its longitudinal direction is parallel to the direction of the river flow, and the three main beams 4a are arranged in the direction of the river flow. And in the center (see FIG. 6A).

  And the steel pile 3 is each inserted in each insertion space 213 of the conducting material girder 2a temporarily hold | maintained, and the lower part of the steel pile 3 is driven into the river bottom (refer FIG.7 (b)). Next, the steel pile 3 protruding upward from the conductive material girder 2a is cut out in a state where the conductive material girder 2a is kept horizontal, and the upper part of the steel pile 3 after the part is cut off is a pile fixing device. By 55, it fixes to the conducting material girder 2a. Such work is performed by a worker. A stand 56 is hooked in front of the guide beam 2a so that the worker can easily perform the above work (see FIGS. 7A and 7B).

Thereby, the conducting material girder 2a is fixed so that the longitudinal direction thereof is parallel to the river flow while maintaining the horizontal state. Thereafter, the conductive material girder temporary holding member 54 temporarily holding the conductive material beam 2a is removed from the main beam 4a, the conductive material beam 2a and the main beam 4a are fixed, and the temporary pile 51 is extracted.
Next, the next conductor girder 2 b is temporarily held by the conductor girder 2 a and the steel pile 3 using the conductor girder temporary holding member 54 at the front end of the main girder 4 whose central portion in the length direction is fixed. And the steel pile 3 is driven in by the crane 53, and the driven steel pile 3 and the conducting material girder 2b are fixed by the steel pile fixing device 55 (refer Fig.8 (a), (b)).

  Thereafter, between the three main girders 4a, two main girders 4s having a half length of the main girders 4a are hung so as to connect the abutment 7 and the conductive material girders 2a (see FIG. 6B). . And the cross beam 5 is provided between the abutment 7 and the conducting material girder 2a, and also the covering board 6 is spread on the cross beam 5 (refer FIG.8 (b)) (In addition, in FIG. In order to avoid complications, the cross beam 5 and the lining plate 6 are not shown).

  Next, the two main girders 4 (hereinafter, the main girder 4 is referred to as the main girder 4b) having a length approximately twice as long as the span are spanned across the conducting girder 2b with the conducting girder 2a as a base point. And extend in the river crossing direction. In this state, the main girders 4b are arranged alternately with the main girders 4a in the river flow direction. In addition, the conducting material girder 2 (hereinafter referred to as the conducting material girder 2c) is temporarily held at the tip of the main girder 4b extending in the crossing direction of the river in the same manner as the conducting material girder 2b. (See FIG. 6 (c)).

  Then, in the same manner as described above, the steel piles 3 are inserted into the respective insertion spaces 213 of the temporarily held conducting material girders 2c, the lower portions of the steel piles 3 are driven into the river bottom, and the upper portions of the steel piles 3 are introduced into the conducting material. By fixing to the girder 2c, the conductive material girder 2c is fixed. Thereafter, the conductive material beam 2c and the main beam 4b temporarily holding it are fixed. And the cross beam 5 is provided between the conductive material beam 2a and the conductive material beam 2b, and the covering board 6 is spread on the horizontal beam 5 (refer FIG. 9 (a), (b)).

Next, the three main girders 4 (hereinafter, the main girders 4 are referred to as main girders 4c) having substantially the same length as the main girders 4b are arranged so as to straddle the conducting girders 2c. It extends in the river crossing direction. In this state, the main girders 4c alternate with the main girders 4b in the river flow direction.
In addition, a conducting girder 2 (hereinafter, this conducting girder 2 is referred to as a conducting girder 2d) is temporarily held at the tip of the main girder 4c extending in the crossing direction of the river in the same manner as the conducting girder 2b. (See FIG. 6D).

  Then, in the same manner as described above, the steel piles 3 are respectively inserted into the insertion spaces 213 of the temporarily held conductor girders 2d, the lower portions of the steel piles 3 are driven into the river bottom, and the upper portions of the steel piles 3 are introduced into the conductor. By fixing the girder 2d, the conductive material girder 2d is fixed. Thereafter, the conductive material beam 2d and the main beam 4c temporarily holding it are fixed. And the cross beam 5 is provided between the conductive material girder 2b and the conductive material beam 2c, and the covering board 6 is spread on the horizontal beam 5.

  Next, two main girders 4 having a length substantially equal to that of the main girders 4b (hereinafter, the main girders 4 are referred to as main girders 4d) are placed across the conducting girders 2d so as to cross the conducting girders 2c. It is further extended in the crossing direction of the river, and its tip reaches the opposite bank. In this state, the main girders 4d alternate with the main girders 4c in the river flow direction (see FIG. 6E). And the cross beam 5 is provided between the conductive material girder 2c and the conductive material beam 2d, and the covering board 6 is spread on the horizontal beam 5.

  Thereafter, the three main girders 4t having approximately half the length of the main girder 4d are extended from the conducting material girder 2d to the opposite bank, and their tips reach the opposite bank. In this state, the main girders 4t alternate with the main girders 4d in the river flow direction (see FIG. 6F). The pier 1 is completed by providing the cross beam 5 between the guide beam 2d and the opposite bank, and further laying the lining board 6 on the cross beam 5 (see FIGS. 1 to 3).

As described above, in this embodiment, the pier 1 is provided with the conductive material beam 2. And if the conducting material girder 2 is assembled in advance and the conducting material girder 2 is used in the field, the steps for constructing the pier 1 can be reduced, and the pier 1 can be constructed in a short period of time.
In addition, since the main girders 4a to 4d having almost twice the length of the span are used for the construction of the jetty 1, the number of main girders used for the construction of the jetty 1 is reduced, and the jetty 1 can be used for a shorter period of time. Can be built with.

Moreover, since the conducting material girder 2 is temporarily fixed at the front end portion of the main girder 4, it is fixed, so the time from temporarily holding the guiding material beam 2 to fixing it can be shortened, and the entire pier 1 can be shortened. The construction period can be shortened.
FIG. 10 is a diagram showing in detail the configuration of the conductive material girder temporary holding member 54.
The temporary girder temporary holding member 54 has a vertically long vertical body 541 extending in the vertical direction, a horizontal body 542 integrally provided on the top of the vertical body 541, and a contact provided at the center of the vertical body 541. A member 543 and a holding member 544 provided at the lower end of the vertical body 541 are provided.

The horizontal body 542 intersects with the vertical body 541 and extends in the horizontal direction while being provided on the vertical body 541. Further, the horizontal body 542 has flanges formed at the upper and lower ends thereof.
The contact member 543 has a shape projecting from the vertical body 541 by a predetermined dimension in the horizontal direction.

The holding member 544 has a substantially U-shaped cross section, and protrudes in the horizontal direction from the vertical body 541 so that the U-shaped tip portion faces downward.
Then, the flange at the upper end of the horizontal body 542 is fastened to the flange at the upper end of the main girder 4 with a clamp 55, and the conductive material girder temporary holding member 54 is attached to the main girder 4. Next, the guide member 2 is brought into contact with the contact member 543 and the holding member 544 of the guide member temporary holding member 54, and in this state, the upper part of the upper member 21 of the guide member 2 and the main beam 4 The lower end flange is fastened with a clamp 55, and the lower part of the auxiliary girder 22 of the conductive material girder 2 and the tip of the holding member 544 are fastened with the clamp 55.

Thereby, the conducting material beam 2 is temporarily held by the main beam 4 while maintaining a vertical state. Further, by removing the clamp 55, the guide beam temporary holding member 54 can be easily removed.
The present invention is not limited to the embodiment described above, and various modifications can be made within the scope of the claims.
For example, in the above description, the conductive material beam 2 has a truss structure, but may not have a truss structure.

Moreover, the length of the main girders 4a-4d should just be longer than the length of a branch, for example, may be 3 times or 4 times the length of a branch.
Moreover, the number of the conducting material girder 2 and the main girder 4 for constructing the pier 1 is not restricted to the above-mentioned thing, but can be changed variously.
Moreover, the jetty 1 is not restricted to what is built in a river, For example, you may build in a valley.

It is a top view which shows the jetty concerning one Embodiment of this invention. It is the figure seen from the arrow A direction of FIG. It is the figure seen from the arrow B direction of FIG. It is a figure which shows the structure of a conducting material girder in detail. It is a perspective view which shows a part of upper girder in detail. It is a figure which shows roughly the construction procedure of a pier. It is a figure which shows the way of the operation | work using the crane at the time of an operation | work start. It is a figure which shows the method of the operation | work in the state which the operation | work further advanced from the state shown in FIG. It is a figure which shows the method of the operation | work in the state which the operation | work further advanced from the state shown in FIG. It is a figure which shows the structure of a conductive material girder temporary holding member in detail.

Explanation of symbols

1 Pier 2 Conductor Girder 2a to 2d Conductor Girder 3 Steel Pile 4 Main Girder 4a, 4b Main Girder 7 Abutment 21 Upper Girder 22 Auxiliary Girder 23 Breath 211 Channel Steel

Claims (4)

A plurality of conductive girders provided in parallel to the direction perpendicular to the erection direction and at regular intervals in the erection direction;
To support each conductor girder, the upper part is fixed to the conductor girder and the lower part is a plurality of steel piles driven into the ground,
A main girder spanned between a conducting girder and a conducting girder and extending in the installation direction,
The conductive material girder has an upper girder in which two channel steels are connected in parallel with a gap into which the steel pile can be inserted.
The steel pile is inserted vertically downward from the gap between the two channel steels constituting the upper girder of the conductive material girder, the lower part is driven into the ground, and the upper part moves up and down with respect to the upper girder A pier characterized by being fixed so that it does not. The conducting material girder is
An auxiliary girder extending in parallel with the upper girder below the upper girder,
A plurality of braces connecting the upper girder and the auxiliary girder,
The pier according to claim 1, wherein the steel pile is inserted via the auxiliary girder. It is a method of constructing a pier using a guide girder,
The conductive material girder has an upper girder in which two channel steels are connected in parallel with a gap through which a steel pile can be inserted.
From the abutment provided at the base of the pier, extend the first main girder in the erection direction and temporarily hold the tip side with a temporary pile,
Temporarily holding in a horizontal direction a first conductive material girder provided parallel to a direction orthogonal to the erection direction at a substantially central portion of the first main girder,
Insert the steel pile vertically downward from the gap between the two channel steels that make up the upper girder of the first conducting material temporarily held above, and drive the lower part of the inserted steel pile into the ground. Is fixed to the upper digit,
Furthermore, in the same manner as described above, a second conductive material girder fixed by a steel pile is attached to the tip of the first main girder,
A second main girder extending across the second conducting girder supported by the steel pile and extending forward from the first conducting girder in the erection direction is attached.
Then, the construction method of the pier characterized by attaching a several conducting material girder sequentially in the same procedure as said 2nd conducting material girder. The conducting material girder is
An auxiliary girder extending in parallel with the upper girder below the upper girder,
A plurality of braces connecting the upper girder and the auxiliary girder,
The said steel pile is inserted through the said auxiliary girder, The construction method of the pier of Claim 3 characterized by the above-mentioned.

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