JP2005097865A - High-rise horizontal member jack-down method, and jack to be used for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-rise horizontal member jack-down method which jacks down a high-rise horizontal member to the height of a bearing portion on a column by alternately holding the high-rise horizontal member by jack 2 groups which are each formed by piling up small jack link groups with safety nuts in multiple stages, and gradually lowering the height of the small jack link groups when out of the bearing, and to provide a jack to be used for the method. <P>SOLUTION: According to the jack-down method, the two jack 2 groups 2A, 2B are formed by piling up the small jack link groups 3' with the safety nuts on the column 1 in multiple stages, and the jack groups then function as a conventional stand saddle, a temporary bearing saddle, and a lowering jack. The jacks 2 of the first and second groups 2A, 2B are alternately lowered or elevated, and the jack 2 is removed beginning from the small jack link group 3' in an upper stage at the time of jack-down operation, while the jack bears the high-rise horizontal member at the time of jack-up operation. Thus by repeatedly carrying out the jack-down and jack-up operations, the high-rise horizontal member is lowered to the bearing portion 5 on the column 1, and then the high-rise horizontal member is borne by the bearing portion 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a high-rise horizontal object (bridge girder, bridge, etc.) that is mounted indirectly on a jack installed on a column via a horizontal feed device, or a high-rise horizontal object that is mounted directly on a jack installed on a column. The present invention relates to a jack down method for lowering a dome or a roof frame of a large warehouse to a column support and a jack used in the method.

Conventionally, bridge girders and bridges are assembled in a local yard. Then, it is fed above the column by the function of a horizontal feeding device installed on a stand sander stacked in a cross-beam shape on a peer (column) or bend (column).
The jackdown for supporting the bridge girder, bridge and other erected bodies on the shoe on the column is performed in the following procedure.
(1) Jack up the descent jack 200 installed on the platform sanddle 100 to support the erection body 300 such as a bridge girder and a bridge so that the horizontal feeding device B can be removed, and then to the column 300 in the erection body 300 column 1 The horizontal feeding device B is removed using the temporary receiving sandals 400 stacked in a shape (FIGS. 11 and 12).
(2) The lowering jack 200 is jacked down so that the installation body 300 is supported by the temporary receiving sanddle 400, and then the lowering jack 200 is once moved from the table sander 100, and then the upper stage table sander 100 is moved. And the descent jack 200 is installed again on the lowered stand sandal 100.
(3) Jack the descent jack 200 up to support the erected body 300, and remove the temporary receiving sander 400 at this time.
Thereafter, the steps (2) and (3) are repeated, and the installation body 300 is lowered while gradually lowering the heights of the stand sanddle 100 and the temporary receiving sanddle 400 (FIG. 13), and the shoe (scorpio) ) Is lowered to 5, the erected body 300 is supported by the shoe (scorpio) 5, and finally the lowering jack 200 is removed (FIG. 14).
The roof frame of a dome or a large warehouse is also installed by lifting it directly onto a jack for descent on a platform sanddle that is assembled at a local yard and stacked in a column shape on a column, using the crane (2) (3 In the same manner, the roof frame is lowered to the support part on the column, the roof frame is supported by the support part, and finally the lowering jack is removed.
The existence of prior art documents relating to the jackdown of the above-mentioned high-rise horizontal structure is unknown to the applicant.

By the way, the above-described sanddle used for the table and the temporary holder has a fixed size, and an adjustment plate, a wedge, or the like is used for the intermediate height. Therefore, height adjustment and removal are very troublesome and cumbersome, which is also very dangerous because it is a work at a high place.
Moreover, since the jack for a descent mentioned above is the structure which receives the weight of the high-rise horizontal object on a column with 1 or 2 units | sets, a large sized thing is required. The operation of moving this in a narrow space is difficult.
In addition, when the weights of the stand sandals, the temporary receiving sandals, and the lowering jacks are added, the weight becomes very heavy, and the burden on the column supporting the weight becomes large.

  The present invention has been made in view of the above-described conventional circumstances, and its technical problem is that a small jack can be obtained by alternately changing a high-rise horizontal object in two groups of jacks formed by stacking small jack connection groups with safety nuts in multiple stages. It is to jack down the high-rise horizontal object to the height of the support part on the column while gradually decreasing the height of the connection group.

  The technical means taken in order to solve the above-mentioned problem is that the jack (2) in the jack-down method for a high-rise horizontal object supported directly or indirectly via a horizontal feeding device to a jack installed on a column. Is composed of a plurality of groups of small jacks connected in a horizontal direction to a plurality of small jacks with safety nuts, and the jacks (2) consisting of the plurality of small jacks are alternately jacked down. Dividing into two groups to be jacked up and supporting a high-rise horizontal object, jacking down the two groups of jacks (2A) (2B) alternately, jacking up and jacking them down (2A) (2B) Is removed from the upper-stage small jack connection group, and the work of supporting the high-rise horizontal structure is repeated during jackup, and the high-level horizontal structure is removed to the support on the column. Tassels by a jack-down method of tall lateral bridging material, characterized in that to support the high-rise lateral bridging material at the supporting portion (claim 1). Here, as an example of the high-rise horizontal structure, a bridge girder or a bridge can be cited. And the support part in that case becomes a shoe (scorpio) (Claim 2).

The above means that the small jacks 2 groups (2A) (2B) formed by stacking small jack connection groups with safety nuts on the column in multiple stages function as conventional stand sandals, temporary receiving sandles, and descending jacks. Let
That is, when a high-level horizontal object is supported by the jack (2A) (first group), the upper stage of the jack (2B) (second group) (the upper stage of the small jack connection group) is removed, and this time Jack up the lowered jack (2B) (second group), support the high-rise horizontal object, and change it. Then, remove the upper stage of the jack (2A) (first group) (the upper stage of the small jack connection group), and this time, the lower jack (2A) (first group) will support and hold the high-rise horizontal object. . The steps are repeated to gradually lower the height of each of the jacks 2 group (2A) (2B), and the high-rise horizontal object is lowered to the column support part height.

  In addition, the jack used in the method is composed of a plurality of groups of small jacks connected in a horizontal direction to a plurality of small jacks connected with a plurality of small jacks with safety nuts. 2) is alternately jacked down and jacked up to divide it into two groups that directly or indirectly support high-rise horizontal objects on the column. Jacks (2A) and (2B) of each group are jacked down. Sometimes it is removed from the upper-stage small jack connection group, and a high-rise horizontal object is supported when jacking up.

In the present invention, as described above, the high-level horizontal structure is alternately changed in the two groups of the jacks configured by stacking the small jacks with the safety nuts stacked in a multi-stage shape in a multi-stage shape. This is a jack-down method for jacking up a high-rise horizontal object to the height of the support on the column while gradually reducing the height, and the jack used in that method. The height adjustment is easy, and it is much easier than the conventional one that can not be removed unless specialized workers rely on it, such as a sanddle that is stacked in a cross-beam shape and intervenes adjustment plates and wedges etc. Is improved and it is very safe.
In addition, the jack composed of the multi-stage stacked small jack connection group of the present invention is configured to be removable from the upper stage while serving as the conventional stand sanddle, temporary receiving sanddle, and descent jack. Therefore, when lowering the high-rise horizontal structure gradually, it is not necessary to waste the labor of moving the jack for descent by using the narrow space between the high-rise horizontal structure and the stand sander, and further workability is improved. As a result, the jack-down work can be significantly shortened.
In addition, the two groups of jacks are extremely light compared to the total weight of conventional stand sandals, temporary receiving sandals, and descending jacks, and are practically effective in that they do not concentrate stress on the columns that support them. Is.

BEST MODE FOR CARRYING OUT THE INVENTION

  A jack installed on a column and supporting a high-rise horizontal structure is composed of a plurality of groups in which a plurality of small jacks having safety nuts connected in a horizontal direction are stacked in a multi-stage manner.

  The small jacks are divided into two groups that are alternately jacked down and jacked up to support a high-rise horizontal object.

  Supporting unit on the column by repeatedly jacking up and jacking up the two groups of jacks and removing the jack from the upper-level small jack connection group and supporting the high-rise horizontal object when jacking up The high-level horizontal object is lowered until the high-level horizontal object is supported by the support portion.

  FIGS. 1-10 has shown the jackdown method of the high-rise horizontal object of this invention, and the embodiment of the jack used for the method. In this description, a case where the high-rise horizontal structure is a bridge girder (main girder) will be described.

  The column 1 is a peer or a bend (temporary support), and the bend is set up next to the peer and a jack 2 is installed on the column 1.

  This jack 2 is composed of a plurality of groups in which small jack connection groups 3 'for connecting a plurality of small jacks 3 with safety nuts 13 in the horizontal direction are stacked in a multistage manner.

  As shown in FIG. 5, the small jack 3 includes a safety nut 13 that is screwed onto a screw 33 on the outer peripheral surface of the piston rod 23, and the safety nut 13 is fastened to the cylinder 43 so that it does not loosen when jacking up or jacking down. The cylinder 43 has a pedestal 53, and a top plate 63 is provided at the tip of the piston rod 23.

  The small jack 3 stacks a plurality of small jack stages formed by releasably connecting a plurality of adjacent pedestals 53 to each other and stacks the upper pedestal 53 and the lower upper plate 63 between the stages. Are connected in a releasable manner to constitute the jack 2 (in detail, a plurality of groups).

As shown in FIG. 5, the connecting member 4 includes a base 53, bolts 34 that pass through the mounting holes 14, 14 that are opened at the same position of the upper plate 63, nuts 44, and a pair of connecting plates 24, 24. A pair of connecting plates 24, 24 are assigned from above and below across the pedestal 53 adjacent to each stage and the upper plate 63, and the bolts 34 are inserted through the mounting holes 14, 14 and the pair of connecting plates 24, 24. By fastening the nuts 44 so as to be relaxed, the pedestal 53 and the upper plate 63 are connected to each other and the adjacent pedestals 53 and 53 and the upper plates 63 and 63 are connected to each other between the respective steps. doing.
In addition, it is preferable that the pedestals 53 and 53 adjacent to each other in the lowermost small jack connection group 3 ′ are releasably connected to increase the integrated strength of the jack 2.

  The jacks 2 are installed on the left and right sides of each column 1 for the second group, and the main girder A to be assembled in the local yard on the uppermost plate 63 group of the uppermost jack 2 of either one of the two groups on the left and right sides. A horizontal feeding device B that feeds above each column 1 is supported. At the time of feeding, a hand-roller a is attached to the leading end of the main beam A, and the guide function of the hand-roller a is used (see FIGS. 1 and 2).

  As described above, the jack 2 is jacked down so that the main girder A fed across the columns 1 by the horizontal feeding device B is supported by the support portion (shoe) 5. Below, the jack 2 is divided into the first group 2A and the second group 2B, and the jack-down process will be described.

(1) Jack the second group 2B that does not support the horizontal feeding device B, jack up the main beam A, and then remove the horizontal feeding device B (see FIG. 6).
(2) Jack up first jack group 2A to support main girder A, then jack down jack second group 2B and connect small jack connection group 3 'at the upper stage of jack second group 2B Is released and removed (FIGS. 7 and 8).
(3) Jack 2nd group 2B whose overall height has been lowered is jacked up to support main girder A, jack 1st group 2A is jacked down, and a small jack connected to the upper stage of jack 1st group 2A The group 3 ′ is disconnected and removed (FIG. 9).
Subsequently, (2) and (3) are repeated to jack down to the support part (shoe) 5, the main girder A is supported by the support part (shoe) 5, and finally the small jack connection group 3 'in the lower stage is connected. Is released and removed (FIG. 10).
That is, when the jack is down in the total stroke range in which the main girder A can be supported again by the first group 2A and the second group 2B of the jack whose overall height is lowered when the jack is raised, the jacks of the first group A and the second group 2B The upper stage small jack connection group 3 ′ is removed, and the main girder A is alternately switched between the first group 2A and the second group 2B of the jack, and the main girder A is jacked down to the support portion (shoe) 5 on the column 1. It is. FIG. 3 shows an intermediate process at the time of jackdown, and FIG. 4 shows a final process in which the lower small jack connection group 3 ′ is removed.

  In this embodiment, the bridge girder (main girder) has been described as an example. However, the bridge is also jacked down in the same process, and a high-rise horizontal object such as a dome or a roof frame of a large warehouse is After supporting the high-rise horizontal object in two groups directly with a crane or the like, the above (2) and (3) are repeated to jack down to the support part.

The side view which shows the state before carrying in the main girder in the jackdown method of the high-rise horizontal body of this Embodiment. The side view which shows the state which sent over the main girder on the column with the horizontal feeding apparatus, and was bridged. The side view which shows the state which removed the horizontal feeding apparatus. The side view which shows the state which supported the main girder on the shoe on a peer (column). The perspective view of a jack. The front view corresponding to FIG. 3 which supports the main girder with a jack. In the jackdown method, the first group and the second group of jacks are shown with the middle omitted in the front view showing the outline of the state in which the main girder is supported. In the same jackdown method, the first group of jacks are jacked down, the main group is supported by the second group, and the small jack connection group at the upper stage of the first group that has been jacked down is removed and shown in the middle view Omitted. In the same jackdown method, the first group of jacked-down jacks are jacked up to support the main girder, the second group is jacked down, and the upper small jack connecting group is removed in the front view. Omitted. The front view which shows the state which jacked down the height of the bridge girder and the bridge to the height of the support part in the jackdown method. The front view which shows the state which sent the bridge girder and the bridge on the column with the horizontal feeder in the conventional jackdown method. The front view which shows the state which interposed the sandal for temporary fixing. The front view which shows the state which removes alternately the sand for stand and the sandal for temporary fixing, and makes the height of the jack low. The front view which shows the state which supported the bridge girder and the bridge to the shoe.

Explanation of symbols

1: Column B: Horizontal feed device 3: Small jack 2: Jack 2A: Jack first group 2B: Jack second group A: Bridge girder (main girder) 5: Support part (shoe)
3 ': Small jack connection group

Claims (3)

  In the jack-down method of a high-rise horizontal object that is directly or indirectly supported by a jack installed on a column via a horizontal feeding device, the jack (2) includes a plurality of small jacks with safety nuts in a horizontal direction. A group of small jacks connected to each other is composed of a plurality of groups stacked in multiple stages, and the jacks (2) made up of a plurality of small jacks are divided into two groups that are alternately jacked down and jacked up. Support and jack down the two groups of jacks (2A) (2B) alternately, jack up and remove the jacks (2A) (2B) from the upper level small jack connection group when jacking down, Repeat the work of supporting the horizontal object, lower the high-level horizontal object to the support part on the column, and support the high-level horizontal object by the support part. Jack-down method of tall lateral bridging material, characterized and.   2. The method for jacking down a high-rise horizontal structure according to claim 1, wherein the high-rise horizontal structure is a bridge girder or a bridge, and the support portion is a shoe (scorpio).   A jack used in the jack-down method for a high-rise horizontal object according to claim 1 or 2, wherein a plurality of small jacks connected in a horizontal direction are connected in a multistage manner. The jacks (2) consisting of a plurality of small jacks are divided into two groups in which a high-rise horizontal object is directly or indirectly supported on a column by alternately jacking down and jacking up, The jacks used in the method of jacking down a high-rise horizontal structure, wherein the jacks (2A) and (2B) of the group are removed from the upper-stage small jack connection group when the jack is down and the high-level horizontal structure is supported when the jack is up .

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