JP3318133B2 - How to build artificial ground - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing an artificial ground, for example, over a track or a road.

[0002]

2. Description of the Related Art As is well known, when constructing artificial ground that straddles a track, a road, or above an existing facility, according to the prior art, when a span to be bridged is small, beams are collectively collected from outside the site using a large crane. And suspended it.

[0003]

However, when the span is large, the beam weight is large and construction is often impossible even with a large crane. In this case, a temporary support is set up and The divided beams were spanned, the beam joints were bolted to integrate the beams, and the lower temporary struts were removed to complete the beams. For this reason, traffic and existing buildings were greatly hindered, and both the construction period and construction cost were large.

[0004] The present invention has been made in view of the above circumstances, and has as its object to provide a method of constructing an artificial ground which is easy to construct and can be economically performed in a short construction period.

[0005]

According to a first aspect of the present invention, there is provided a method of constructing an artificial ground, comprising: constructing an artificial ground supported by a large span truss beam above a ground surface; A support structure for supporting both ends of the truss beam, a temporary beam extending in a direction orthogonal to the support structure and straddling the installation target position, and running along the temporary beam. A first carriage to be provided, and a temporary gantry is provided outside the support structure on an extension of the temporary beam, and a second trolley running on the extension of the temporary beam is provided on the temporary gantry. Is provided, the unit truss beams in a form in which the truss beams are divided in the length direction are assembled on the temporary gantry, and the front end thereof is supported by the first bogie and the rear end is formed by the second bogie. Support them first, second The unit truss beam is sent to the tip side by running the bogie, and another unit truss beam is connected to the rear end of the unit truss beam that has been sent out and further sent out, so that the truss beam is extended over the entire length. The truss beam assembled is bridged between the support structures, and the truss beam is sent forward and bridged above the erection target position. The truss beams are bridged above the installation target position by connecting to the truss beams, and a floor that becomes an artificial ground is provided above the truss beams sent to the installation target position. is there.

According to a second aspect of the present invention, in the method of constructing an artificial ground according to the first aspect, a unit truss beam is assembled on the temporary gantry and another unit truss is provided below the temporary gantry. After assembling the beams, sending out the unit truss beams assembled on the temporary gantry to the tip side, lifting other unit truss beams assembled below the temporary gantry, placing them on the temporary gantry, and sending the tip of the unit The present invention is characterized in that the unit truss beams are connected to the rear end of the truss beams and the connected unit truss beams are further fed out.

Further, according to a third aspect of the present invention, in the method of constructing an artificial ground according to the first aspect, a unit truss beam is assembled on the temporary gantry, and at the same time, another unit is provided beside the temporary gantry. After assembling the truss beams and sending out the unit truss beams assembled on the temporary gantry to the front end side, slide the other unit truss beams assembled on the side of the temporary gantry horizontally and horizontally and place them on the temporary gantry, The leading end is connected to the rear end of the sent unit truss beams, and the connected unit truss beams are further sent out.

[0008]

In the method of constructing an artificial ground according to the first aspect, a unit truss beam having a form in which a truss beam is divided in a longitudinal direction is assembled on a temporary gantry, and a tip end thereof is supported by a first bogie. Support the rear end to the second carriage,
By running the first and second bogies, the unit truss beam is sent out to the front end side, and another unit truss beam is connected to the rear end of the unit truss beam that has been sent out and further sent out. Assembling the truss beams over the entire length, bridging the assembled truss beams between the support structures, sending out the truss beams forward and bridging above the erection target position, and repeating the above procedure. The truss beams are connected to the rear of the truss beams and then sent out, so that the truss beams are bridged above the erection target position, and a floor serving as an artificial ground is provided above the truss beams sent to the erection target position.

In the method of constructing an artificial ground according to a second aspect, a unit truss beam is assembled on the temporary gantry, and another unit truss beam is assembled below the temporary gantry, and the unit truss is assembled on the temporary gantry. After sending out the beam to the tip side, another unit truss beam assembled below the temporary gantry is lifted and placed on the temporary gantry, and its tip is connected to the rear end of the sent unit truss beam and connected to them. Send out more unit truss beams.

Further, in the method of constructing an artificial ground according to claim 3, the unit truss beam is assembled on the temporary gantry, and another unit truss beam is assembled on the side of the temporary gantry, and the unit is assembled on the temporary gantry. After the truss beam has been sent out to the front end, the other unit truss beams assembled on the side of the temporary gantry are slid horizontally and horizontally, and placed on the temporary gantry. And further send out the connected unit truss beams.

[0011]

1 to 7 show an embodiment of the present invention.
This will be described with reference to FIG. Here, a case will be described in which an artificial ground 3 supported by large span truss beams 2 supported by columns (supporting structures) 1 illustrated in FIG. First, as shown in FIG. 2, a foundation for permanent construction receiving the artificial ground 3 is made, and pillars 1 are built. Until the truss beams 2 are rigidly joined to the upper part, the pillars 1 are built as cantilevers from the ground, so that the columns 1 are made to work well against lateral forces. Then, slide rail receiving beams 11, 11 are hung on the upper portions of the columns 1, and rails 12, 12 are installed. The temporary beams 15, orthogonal to the rails 12, 12, are provided so as to straddle the installation target position of the artificial ground 3. 15 is arranged.

The temporary beam 15 is desirably a box beam to improve stability when the main truss beam 2 is suspended. Further, since it is only necessary to support the weight of the steel frame of the truss beam 2, the truss beam 2 is very light in comparison with the truss beam 2, and may be suspended by a crane at once or used for bridge construction. It may be bridged by a so-called hand-rolling method.

As shown in FIG. 3, a rail 16 is provided on the temporary beams 15, 15, and a first carriage 17 is arranged on the rail 16. And the temporary beams 15, 1
A temporary gantry 21 for assembling the truss beams 2 is provided on the extension of the column 5 outside the pillars 1... A rail 22 is also provided on the temporary gantry 21 in its longitudinal direction, and a second carriage 23 is also arranged on the rail 22. I do. When assembling the truss beam 2 that supports the artificial ground 3 on the temporary gantry 21, the truss beam 2 is assembled into a unit truss beam 25 in the form of a unit truss beam 25 divided in the length direction. The first carriage 17 is supported via a front jack (not shown), and the rear end is supported on the second carriage 23 via a jack (not shown).

When one unit truss beam 25 is assembled, as shown in FIG. 4, the first bogie 17 and the second bogie 23
, The unit truss beam 25 is sent out to the tip side. Further, by connecting another unit truss beam 25 to the rear end of the sent unit truss beam 25 and further sending it out, the truss beam 2 was assembled and assembled over the entire length as shown in FIG. The truss beam 2 is bridged between the columns 1..., And the first bogie 17 and the second bogie 2
The truss beam 2 is lowered on the slide rail 12 by lowering the jack arranged at 3. At this time, the second carriage 23 is the pillar 1
The temporary jaw 27 is attached to the last part of the truss beam 2 and removed when the jack-down is completed. Then, the truss beam 2 is sent forward and is bridged above the installation target position.

The above procedure is repeated to assemble other truss beams 2, and a small beam is put between the truss beam 2 and the truss beam 2 that has been slid in advance, and connected to the rear, and further sent out. The truss beam 2 is bridged above the installation target position. After setting all the truss beams 2 to support the artificial ground 3, the temporary beams 15, 1
5 and the like, pillars 1... And truss beams 2... Are rigidly connected at the column caps to form a portal frame, and as shown in FIG. Complete.

According to the method of constructing an artificial ground according to this embodiment,
By adopting the temporary beams 15 and 15 and sliding in two directions, it is possible to construct a large-span artificial ground without standing any pillars at the bottom, so that traffic and operations below are not hindered. There is no problem with existing buildings. Further, the front end of the permanent truss beam 2 is supported by the first bogie 17 on the temporary beam 15, and the rear end is supported by the second bogie 23 on the temporary gantry 21.
Therefore, the load applied to the temporary beam 15 is half of the weight of the permanent truss beam 2, and the temporary beam 15 can be simplified. Further, since the truss beam 2 is divided and assembled, a large crane is not required.

Since the jacks are incorporated in the first bogie 17 and the second bogie 23 for moving the unit truss beams 25, it is very easy to adjust the level when assembling the truss beams 2 and to lift the truss beams 2 when moving. Work efficiency is improved.

In the above embodiment, the temporary gantry 2 is located at the end of the position where the artificial ground is to be constructed, that is, at the position A shown in FIG.
Although the case where 1 is provided has been described as an example, it may be provided at, for example, position B according to the situation around the construction site. In this case, the truss beam 2 that has been slid only in the right direction in FIG. 7 is slid in both the left and right directions. Thus, the position of the work space is not limited, and the depth of the work space can be reduced.

In the above embodiment, the truss beams 2
After all of the... Are arranged, concrete is cast on the floor (artificial ground) 3 or the like, but these may be performed at appropriate times according to the progress of the construction work and the like.

Next, a second embodiment of the artificial ground construction method of the present invention will be described with reference to FIGS. In this embodiment as well, the outline of the process is the same as that of the first embodiment described above, but it is characterized by the procedure of assembling the unit truss beams 25 on the temporary gantry. That is, FIG.
In this embodiment, as shown in FIG. 9 and FIG. 9, the temporary gantry 31 has a two-layer structure. Pillars 32 are erected, and a rail receiving beam 33 is arranged thereon to support the rail 34. Then, the bogie 23 is placed on the rail 34, the truss beam receiving girder 37 is passed over, and the jack 37 is set on the girder 37. Further, portal frames 41, 41 for lifting the unit truss beams 25 assembled in the lower layer are constructed, and center hole jacks 42, 42 are attached to the upper girders as a lifting device.

The unit truss beam 2 is provided by the temporary gantry 31.
10, the unit truss beams 25 are assembled on the temporary gantry 31 as shown in FIG. 10 and other unit truss beams 25 are assembled below the temporary gantry 31 as shown in FIG. After the unit truss beam 25 assembled above is sent out to the front end side, the unit truss beam 25 is temporarily received by jacking down, and the second bogie 23 is moved to the rear end.

Next, the other unit truss beams 25 assembled below the temporary gantry 31 are connected to the center hole jacks 42,4.
2 and lifted up and placed on the temporary gantry 31 as shown in FIG.
As shown in (1), the leading end is connected to the rear end of the fed unit truss beam 25, and the connected unit truss beam 25 is further fed. Subsequent operations are the same as those in the first embodiment described above. As shown in FIG. 13, the truss beam 2 is lowered onto slide rails 12 provided on the columns 1, and is slid.

According to the method of constructing the artificial ground shown in the second embodiment, the unit truss beams 25 to be added are pre-assembled, moved and connected to the unit artificial truss beams 25 arranged earlier. Therefore, the construction period can be made extremely short.

Next, a third embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS. This embodiment is also characterized in assembling the unit truss beams 25 on the temporary gantry. In this embodiment, when the unit truss beams 25 are assembled on the temporary gantry as shown in FIG. 14, at the same time, other unit truss beams 25 are assembled on the horizontal pulling rails 51 and 51.

Then, after the unit truss beam 25 assembled on the temporary gantry is sent out to the front end side, the horizontal pulling rails 51, 51 are added as shown in FIG. 15, and another unit truss assembled on the side of the temporary gantry is added. The beam 25 is slid horizontally and horizontally and placed on a temporary gantry. The unit truss beam 25 is slightly lifted and supported by jacks 52, 52 and bogie jacks 53, 53 as shown in FIG.
1, 51 are removed. Thereafter, the tip of the unit truss beam 25 is connected to the rear end of the unit truss beam 25 sent out, and as shown in FIG.
Send 5 out further.

According to the method of constructing an artificial ground shown in the third embodiment, the unit truss beams 25 to be added are pre-assembled, moved, and connected to the unit truss beams 25 arranged earlier. Therefore, the construction period can be made extremely short.

[0027]

According to the method of constructing an artificial ground according to the first aspect, by using a temporary beam and sliding in two directions, it is possible to construct the artificial ground having a large span without raising any pillars at the lower part. It does not hinder traffic and operations below, and there is no problem with existing buildings. In addition, the tip of the permanent truss beam is supported by the first bogie on the temporary beam, and the rear end is supported by the second bogie on the temporary gantry, so the load on the temporary beam is half of the weight of the permanent truss beam. Therefore, the temporary beam can be simplified. Since the truss beams are further divided and assembled,
Does not require a large crane.

In the method of constructing an artificial ground according to the second and third aspects, unit truss beams to be added are pre-assembled, moved and connected to the unit truss beams previously arranged. Therefore, the construction period can be made extremely short.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of an artificial ground constructed by the method of the present invention, wherein (a) is a plan view and (b) is a front view.

FIG. 2 is a perspective view showing a positional relationship between pillars (support structures) and erection beams in the artificial ground.

FIG. 3 is a front view showing a state in which unit truss beams are assembled on a temporary gantry by the method of constructing artificial ground according to the first embodiment of the present invention.

FIG. 4 is a front view showing a state in which the unit truss beams are being sent to the tip end side.

FIG. 5 is a front view showing a state in which the assembled truss beam is suspended over a pillar.

FIG. 6 is a side view showing a state in which a floor serving as an artificial ground is being provided above the truss beams.

FIG. 7 is a plan view showing a positional relationship between a site where an artificial ground is to be provided and a temporary gantry.

FIG. 8 is a view showing a temporary gantry used for a method of constructing artificial ground according to a second embodiment of the present invention, wherein (a) is a side view,
(B) is a front view.

FIG. 9 is a side view showing the positional relationship between the temporary gantry, columns and temporary beams.

FIG. 10 is a front view showing a state where the unit truss beams are assembled.

FIG. 11 is a front view showing a state in which the unit truss beams assembled in the upper layer are sent to the tip end side.

FIG. 12 is a front view showing a state in which the unit truss beams assembled in the lower layer are lifted and the front ends thereof are connected to the rear ends of the unit truss beams sent out.

FIG. 13 is a front view showing a state where the assembled truss beam is suspended over a pillar.

FIG. 14 is a plan view showing a unit truss beam on a temporary gantry and a unit truss beam assembled on a side of the temporary gantry in the method of constructing an artificial ground according to the third embodiment of the present invention.

FIG. 15 is a plan view showing a state in which the unit truss beams assembled on the temporary gantry have been sent out to the tip end side.

FIG. 16 is a diagram showing a state where the unit truss beams assembled on the side of the temporary gantry are slid on the temporary gantry,
(A) is a plan view, and (b) is a view taken along the line CC in (a).

FIG. 17 is a plan view showing a state in which the connected unit truss beams are being sent out toward the distal end thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Column (support structure) 2 Truss beam 3 Artificial ground 15 Temporary beam 17 First bogie 21 Temporary gantry 23 Second bogie 25 Unit truss beam

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Masami Hashimoto 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Koichi Satsuki 4-18-32 Shibaura, Minato-ku, Tokyo Shares (72) Inventor Akihito Kawaguchi 4-18-32 Shibaura, Minato-ku, Tokyo In-house Tokyo Steel Bridge Works (58) Investigated field (Int.Cl. ⁷ , DB name) ) E04B 1 / 00,1 / 35 E04H 1/00

Claims (3)

(57) [Claims] 1. A method for erection of an artificial ground supported by a large span truss beam above the ground surface, comprising: a support structure for supporting both ends of the truss beam on both sides of an installation target position. A temporary beam extending in a direction orthogonal to the support structures and straddling the installation target position is provided, and a first carriage traveling along the temporary beams is provided. A temporary gantry provided on an extension of the temporary beam, a second trolley running on the extension of the temporary beam is provided on the temporary gantry, and a unit of a form in which the truss beam is divided in the length direction. Assembling the truss beams on the temporary gantry, supporting the front end of the truss beam on the first bogie, and supporting the rear end of the truss on the second bogie, and running the first and second bogies. Put the unit truss beam on the tip side By sending out and connecting another unit truss beam to the rear end of the sent unit truss beam and then sending it out, the truss beam is assembled over the entire length and the assembled truss beam is placed between the support structures. The truss beams are forwarded and sent over the erection target position, and the other truss beams assembled by repeating the above procedure are connected to the rear and further sent out, so that the truss beams are sent out. A method of constructing an artificial ground, characterized by providing a floor that becomes an artificial ground above a truss beam sent out to the installation target position. 2. The method for constructing an artificial ground according to claim 1, wherein a unit truss beam is assembled on the temporary gantry, another unit truss beam is assembled below the temporary gantry, and the unit truss is assembled on the temporary gantry. After sending out the beam to the tip side, another unit truss beam assembled below the temporary gantry is lifted and placed on the temporary gantry, and its tip is connected to the rear end of the sent unit truss beam and connected to them. A method for constructing artificial ground, characterized by further sending out unit truss beams. 3. The method according to claim 1, wherein the unit truss beam is assembled on the temporary gantry, another unit truss beam is assembled on the side of the temporary gantry, and the unit is assembled on the temporary gantry. After the truss beam has been sent out to the front end, the other unit truss beams assembled on the side of the temporary gantry are slid horizontally and horizontally, and placed on the temporary gantry. A method for constructing an artificial ground, characterized in that the connected unit truss beams are further fed to the ground.