JPH0390703A - Spanning technique for horizontal member used for both revolution and semi-manual extension - Google Patents

Abstract

PURPOSE:To enable execution of a work, e.g. assembly and overhead construction of a horizontal member, revolution, installation of a wire for providing reaction force, and draw off of the horizontal member, only in one spot, to save a site, and to rationalize a work by a method wherein spanning of the horizontal member is effected in a specified stay spot. CONSTITUTION:The given number of stays 1 are aligned along boundary lines (a) and (a) one both sides of a side A and to the outside thereof at a distance (b) therefrom and at intervals of a given distance (c), and the adjoining stays 1 of each of stay trains I and I' are intercoupled through a beam 2 in the direction of a girder. Elevatable temporary pedestals 6 are respectively temporarily erected to the stay 1 of the stay train I on the one side and to the inner side part of the column head of a stay 1'' on the other side positioned facing a stay 1' located approximately in the middle of the stays 1. A horizontal member 3 from the one end of which a half- manual extender 4 is extended is spanned on the temporary pedestals 6 by means of a crane vehicle. Further, the lateral spanning material 3 from which the half-manual extender 4 is extended is revolved in a 90 deg. arc, a wire 13 for providing reaction force is connected to an earth anchor 14, and a wire 15 of a winch 10 for drawing off the lateral spanning material 3 is bounded to the tip of the half-manual extender 4.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to turning when constructing structures such as artificial ground on roads, railway lines, waterways, etc. with heavy traffic, where shoring cannot be installed between the supports. This relates to a method of constructing horizontal members using semi-hand-stretched construction.

[Prior art and problems to be solved by the invention] Conventionally, construction methods for constructing bridges on heavily trafficked roads, railway lines, waterways, etc., where shoring cannot be installed between the supports, include the erection girder construction method, the cantilever type 1 method, Drawer type 1 method and the like are known.

However, the above-mentioned conventional construction method has problems such as the cost of temporary construction for construction being large and the need to secure a fairly large adjacent construction site.

The present invention provides a construction method that can efficiently construct structures such as artificial ground on roads, railroad tracks, waterways, etc. with heavy traffic, in a narrow site, as an aid to alleviation of land M in urban areas. It was done for the purpose of

[Means to solve the problem]

In order to achieve the above object, the present invention installs column rows consisting of mutually opposing columns on both sides of the site at sites where shoring cannot be installed in the middle, and uses girder beams in the girder direction between the columns on each side. a step of connecting, a step of mounting a horizontal member with an extended hand rolling machine on top of the column head along the − side column row, and a step of mounting the horizontal member with a raised hand rolling machine on top of the column head along the column on the negative side; As a result, the raising hand rolling machine side is turned in the direction of the supporting column on the other side facing the raising hand rolling machine, and the side of the horizontal member opposite to the raising hand rolling machine is rotated to take a reaction force with a wire. The process involves removing the second-half manual rolling machine that has been pulled out in the direction of the columns and supporting both ends of the horizontal beams, and sending the horizontal beams in the direction of the girder, and sequentially applying the horizontal beams to each of the opposing columns in the rows of columns on both sides. It is characterized by a method of constructing horizontal members using a combination of turning and raw potato rolling, which is constructed through a process of erection.

[For production]

The horizontal members to be erected are initially placed on top of the column heads along the column rows, and then rotated in the direction of erection, making it possible to assemble and erect the horizontal members in a narrow construction site, and to make the installation easier after the upper structure is rotated. Since the horizontal members are in the air, they do not impose any restrictions on objects on the ground that are below the height of the pillars.

If the horizontal member is pulled out in the direction of the opposite pillar on the other side, and the tip of the hand-raising machine is supported by the pillar on the other side, the horizontal member will be stabilized by the pillars on both sides in the same state as when it is supported at both ends. Supported. Until the tip of the raising hand rolling machine reaches the support on the other side, the center of gravity moves from the fulcrum of the horizontal member as the horizontal member is pulled out, and an overturning moment is generated in the horizontal member. is balanced by the reaction force of the wire.

Since the length of the horizontal member is extended by the raising hand stretching machine, the distance over which it is necessary to take up the reaction force with the cutting wire is small.

After the tip of the hand-raising machine reaches the column on the other side, continue to pull out the horizontal member, and when both ends of the horizontal member are supported by the pillars on both sides, remove the hand-raising machine and remove the horizontal member. The horizontal members are sent in the girder direction, and the above steps are repeated to sequentially erect the horizontal members on the opposing columns of the column rows on both sides.

In the above construction method, the horizontal members are moved at fixed support points, so work such as assembling the horizontal members, raising them, turning them, installing loose wires, and pulling out the horizontal members can be done at one place. It can save money and streamline construction work.

〔Example〕

The construction method of the present invention will be explained in detail below based on the illustrated embodiments.

The example assumes the case where artificial ground, etc. is constructed above the overhead height limit at sites where it is not possible to install shoring between the supports, such as roads with heavy traffic, multi-track railway lines, waterways, etc. ing.

In this construction method, first, a predetermined number of columns l are set in rows at a predetermined interval C along both side boundaries a and a of the rhinoceros A, and a predetermined distance is set outside each side of the boundary line a, and a row of columns on each side is set. 1. The columns 1 of I' are connected by girder beams 2 in the girder direction. The height of the support column 1 shall be a height d that exceeds the overhead height limit of Sail-A. Then, the pillars 1... of the pillar row I, which is an example of the length range in which the half-hand stretching machine 4 is extended to the horizontal members 3 to be erected, and the pillars 1' (horizontal (The timber rack serves as the transfer position)
On the side of each inner column capital of the other column 1" facing the
A temporary pedestal 6 that can be raised and lowered by jacks 5 as shown in FIG. 0 is temporarily installed. In addition, the temporary pedestal 6' of the support 1', which serves as the transfer position for the horizontal members 3, is rotatable around the axis of its jack 3'. Also, column I on both sides.

A temporary slipway made of a material with a low friction coefficient or a rail, etc., is installed between each of the pillars 1, supported by the beams 2, at the same level as the top surface of the columns 1, and furthermore, a slipway made of a material with a low coefficient of friction, or a rail, etc. A temporary support 8 for holding the tip of the half-rolling machine 4 of the horizontal frame 3 extending from the raw sweet potato rolling machine 4 is temporarily installed at a predetermined position on the side extension line of the column ``l'', and a jack 9 and a horizontal frame 3 are attached to the head of the column.
A winch 10 for the drawer is installed.

After that, use the jack 5 to align the upper surface of the temporary pedestal 6 of each pillar 1 in the - side pillar row ■ to a plane slightly higher than the capital surface of the pillar 1... The horizontal member 3 on which the half-hand rolling machine 4 has been extended is lifted up using a crane truck or the like. At this time, the center of gravity G of the horizontal member 3 extending from the raw sweet potato rolling machine 4 is positioned on the temporary pedestal 6' of the predetermined support column 1'.

If the tip of the raising hand rolling machine 4 comes off the outermost column 1 of the column I, a temporary column 12 with a jack 11 installed at the column head is erected on the extension line of the column ■. 1
Place the tip of the hand stretching machine 4 on the 2nd jack (1st
Figures 2 and 3).

Next, except for the jack 5' of the temporary frame 6' that supports the center of gravity G of the horizontal member 3 which is an extension of the raising hand rolling machine 4, the other jacks 5.1
1 is lowered, the horizontal member 3 of the extension of the raising hand rolling machine 4 is a temporary pedestal 6.
It is supported in a horizontally balanced state with ′ as the fulcrum. Therefore, use a dragnet or the like to turn the horizontal member 3, which is an extension of the raised hand rolling machine 4, by 90', and direct the raised hand rolling machine 4 in the direction of the supporting column 1'' on the other side.
Wire wire 13 tied to the opposite side of the horizontal member 3 from the hand stretching machine
The earth anchor 14 has been driven into a predetermined position in advance.
At the same time, the wire 15 of the winch 10 for drawing out the horizontal member 3 is tied to the tip of the raising hand rolling machine 4 (Figs. 4 and 5).
figure).

Next, the wire 15 is picked up by the winch 10, and the horizontal member 3, which is an extension of the raising hand stretching machine 4, is pulled out. At this time, the upper surface of the temporary pedestal 6# of the supporting column l'' on the opposite side and the jack 9 of the temporary supporting column 8 on which the tip of the raised hand stretching machine 4 rests is raised to the same level as the temporary pedestal 6' on the supporting column 1' side. When the drawer is drawn out, the center of gravity G of the horizontal member 3 extending from the hand-raising machine 4 moves toward the drawer side, and an overturning moment is generated in the horizontal member 3 extending from the hand-raising machine 4 . The tension wire 13 is balanced by the force.An auto-reel 13a is interposed in the middle of the tension wire 13 to accommodate changes in the length of the tension wire 13 as the horizontal member 3 is pulled out.

When the tip of the hand-raising machine 4 reaches the temporary pedestal 6' of the supporting column 1'' on the opposite side, the horizontal member 3 extending from the hand-raising machine 4 is supported stably at both ends, so remove the wire 13. Then, the winch 10 further winds up the wire 15, and when the tip of the horizontal member 3 reaches the opposite column 1# and the tip of the hand-raising machine 4 is supported by the jack 9 of the temporary column 8, the drawer is stopped. Therefore, the jacks 5', 5', and 9 of the support columns 1' and 1'' and the temporary support column 8 are lowered, and both ends of the horizontal member 3 are attached to the support column 1'.
.

1', and remove the raised hand rolling machine 4 (Figures 6 and 7).

The horizontal members 3 supported by the column heads of the columns 1' and 1' are moved laterally on a slipway 7 temporarily constructed on the girder 2 between each column 1, and are placed on opposite sides of the column rows r and I' on both sides. The erecting is carried out on the column head of column 1.1, but this transverse feed is carried out on both sides of column column 1.1. I
Winch 1 for cross-feeding on the column head of column 1 at the outer end of '
6 is temporarily installed, and the wire F tied to both ends of the horizontal member 3 is wound up with the winch 6 (FIG. 8).

After that, repeat the process on the ridges in the same way, and
The horizontal members 3 are erected on each of the opposing columns 1.1, and when all the horizontal members 3 have been erected, the temporary temporary mounts 6.6',
6", slipway 7, temporary supports 8, 1 of hand-raising machine 4
2. Remove the earth anchor 14, winch 16 for horizontal transport, etc. (Fig. 9). After this, construct an artificial ground by erecting small beams, arranging deck plates, pouring concrete, etc.

Note that the process order described in the examples is not limited to this, and may be changed back or forth as appropriate depending on convenience.

〔Effect of the invention〕

As described above, in a site where no shoring can be installed in the middle, the present invention installs column rows consisting of mutually opposing columns on both sides of the site, and connects the columns on each side with girder beams in the girder direction. a step of placing a horizontal member with a raised hand rolling machine on top of the column head along the - side column row; The step of rotating the raw sweet potato rolling machine side toward the supporting column on the other side opposite to it, and taking a reaction force with a sparing wire on the side of the horizontal member opposite to the raised hand rolling machine; The process involves removing the second-half manual rolling machine that has been pulled out in the direction of the columns and supporting both ends of the horizontal beams, and sending the horizontal beams in the direction of the girder, and sequentially applying the horizontal beams to each of the opposing columns in the rows of columns on both sides. It is erected through a process of erection, and the horizontal members to be erected are in a state along the column of columns when assembled, and when swiveled or pulled out, they are in the air and attached to the ground object below the height of the column. It is extremely useful for construction in urban areas where it is difficult to secure construction land without conflict. In addition, the construction work is streamlined because the bridges are moved at fixed support locations. Furthermore, since the cross-member frames are moved by extending the length of the cross-members using a hand-stretching machine and by supporting the reaction force using loose wires, it is difficult to install intermediate supports on roads or railways with heavy traffic. This provides many benefits, such as making it possible to erect large-span horizontal members even on sites such as railroads and waterways.

[Brief explanation of drawings]

Figures 1 to 9 show one embodiment of the construction method of the present invention in order according to the steps, and Figures 1, 2, 4, 6, 8, and 9 are each The plan view of the process, Figure 3 is the second
5 is a side view of FIG. 4, and FIG. 7 is a side view of FIG. 6. 1.1'...Strut row, 1.1', 1''...Strut, 3
...Horizontal member, 4...Raw potato rolling machine, 6.6', 6'...
・Temporary frame, 7... Slipway, 13... Spare wire, A... Site, G... Center of gravity. Figure 1 Figure 10 Figure 3 Fan Figure 7 Procedure amendment (method)

Claims (1)

[Claims] At sites where shoring cannot be installed in the middle, rows of columns consisting of mutually opposing columns are installed on both sides of the site,
A process of connecting the columns on each side with girder beams in the direction of the girder, a process of mounting a horizontal member with a semi-hand rolling machine on top of the column head along the column row on one side, and The frame is rotated from the side of the half-rolling machine toward the opposite column using the column that supports its center of gravity as a fulcrum, and a reaction force is applied to the opposite side of the horizontal frame from the half-roller using a wire. a step of pulling out the horizontal member in the direction of the opposite support column on the other side and removing the second half manual rolling machine with both ends of the horizontal member supported by both supports; and a step of sending the horizontal member in the direction of the girder. A method of erecting horizontal members using a combination of turning and semi-hand-stretching, which is characterized by the process of sequentially erecting horizontal members on each of the opposing columns in the rows of columns on both sides.