Roof construction method

Abstract

To assemble a roof skeleton of a large space structure with high accuracy and efficiency by utilizing a slide construction method without being affected by the shape of a roof.SOLUTION: A method of constructing a roof for assembling a roof skeleton of a large space structure in which a succeeding block assembled in a succeeding manner is connected to the rear of a preceding block assembled in a preceding manner and a sliding operation is sequentially repeated along a wall body supporting the preceding block and the succeeding block comprises the steps of: connecting a succeeding block disposed above the wall body via a plurality of telescopic devices to a preceding block deformed while being supported on the wall body; and shortening the telescopic device to support the succeeding block connected to the preceding block on the wall body. The succeeding block is connected to the preceding block after being deformed into a shape corresponding to the deformation of the preceding block by controlling the expansion amount for each of the plurality of telescopic devices.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a method for constructing a roof for constructing a roof of a large - space structure.

Background Art

[0002] When constructing large - space structures such as gymnasiums and factory buildings, a sliding method may be adopted as a construction method for constructing a roof. For example, Patent Document 1 discloses a method for constructing a steel - framed roof by a sliding method.

[0003] Specifically, a scaffold is assembled on one end side of a previously constructed reinforced - concrete structure, and using this scaffold, on the upper part of one end side of the structure, one unit of a steel - frame truss constituting the roof is assembled. Next, the assembled steel - frame truss is slid by one unit width toward the other end side of the structure.

[0004] After that, on the upper part of the one - end side of the structure where space has been left, the next steel - frame truss is assembled as one unit, added to the previously assembled steel - frame unit, and then slid by one unit width. The operations of assembling one unit of the steel - frame unit, adding it to the preceding steel - frame truss, and sliding these are repeated to construct a roof on the structure.

[0005] According to the sliding method as disclosed in Patent Document 1, a scaffold capable of assembling one unit of a steel - frame truss may be provided on the upper part of one end side of the structure, and the assembly work of the steel - frame unit can be carried out in a fixed and space - saving manner. In addition, since the work of constructing the roof and the work under the roof can be carried out in parallel and simultaneously, it can contribute to shortening the construction period and reducing the construction cost.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] In the sliding method, generally, when a steel frame unit for one unit is supported by a pair of wall bodies constituting a building structure, it is known that vertical descent due to its own weight and spreading in the span (the distance between the pair of wall bodies) direction occur, causing the structure to bend vertically. For this reason, when assembling the steel frame unit, it is bent to prevent the steel frame unit from bending when supported by the paired wall bodies.

[0008] However, when there is a protrusion at the end of the roof in the sliding direction, if a steel frame unit for one unit including this protrusion is assembled and then supported by a pair of wall bodies, deformation in the sliding direction or the vertical direction may occur. In such a deformed state, it is impossible to add subsequent steel frame units, and it is not easy to correct the deformed steel frame unit so that addition is possible. Therefore, when adopting a roof with a protrusion for a large space structure, it has been difficult to apply the sliding method.

[0009] In view of such problems, the main object is to efficiently construct the roof of a large space structure with high precision using the sliding method without being affected by the shape of the roof.

Means for Solving the Problems

[0010] To achieve such an object, the method for constructing a roof of the present invention is Support the roof on a pair of wall bodies facing each other in the span direction a method for constructing a roof of a large space structure, Support on a plurality of telescopic devices on a work stage provided between the pair of wall bodies, above the wall bodies after assembling a preceding block in advance, moving the assembled preceding block Support on the wall body by shortening the telescopic device and sliding it along the wall body, and behind the slid preceding block, Support on the telescopic device, above the wall body assembling a subsequent block, connecting the assembled subsequent block behind the preceding block, and after moving the connected subsequent block Support on the wall body by shortening the telescopic device sliding the preceding block and the subsequent block along the wall body, Assemble the rear-side block above the wall body by supporting it on the telescopic device behind the slid rearward block, connect the assembled rear-side block behind the rearward block, and support the connected rear-side block on the wall body by shortening the telescopic deviceIt is for assembling a roof body that constitutes the roof, and the preceding block On the front side in the direction of sliding along the wall body has a projection at its end, and After assembling with a curvature anticipating the vertical downward deflection that occurs when supported on the wall body, shorten the telescopic device and support it on the wall body, at the time of sliding along the wall body is in a state of being deformed in the sliding direction and the vertical direction. The assembled succeeding block controls the elongation amount for each of the plurality of the expansion and contraction devices, The shape in which the deformation generated in the sliding direction and the vertical direction of the leading block and the trailing block is eliminated when the leading block is connected and then the telescopic device is shortened and supported on the wall body deforms it to

[0011] and is characterized by connecting to the preceding block.

[0012] According to the method for constructing a roof of the present invention described above, since the preceding block assembled in advance includes a projection, when the preceding block in a state supported by a wall body is deformed, the succeeding block is forcibly deformed using an expansion and contraction device so as to cope with this deformation. As a result, the preceding block and the succeeding block can be easily connected, and even for a roof having a projection, the roof body can be assembled with high accuracy and efficiency using a sliding method, and it becomes possible to construct a roof of a large space structure.

Effects of the Invention

[0013] According to the present invention, it becomes possible to construct a roof of a large space structure with high accuracy and efficiency using a sliding method without being affected by the shape of the roof.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiment for Carrying Out the Invention

[0015] The present invention is a method of constructing a roof of a large - space structure by adopting a sliding construction method to assemble a roof framework. In particular, it is a method suitable for the case where there is a projecting part on the roof. Hereinafter, the details of the roof construction method will be described with reference to FIGS. 1 to 8.

[0016] As shown in FIG. 1(a), the large - space structure 1 is a building in which a roof 5 as an upper structure is supported by a wall 2 as a lower structure provided on the outer peripheral part. The roof 5 includes a roof framework 3 and a roof finishing material 4.

[0017] As shown in FIG. 1(b), the roof framework 3 adopts a steel - frame truss structure and is divided into a front block 3a having a projection 31, an intermediate block 3b, and a rear block 3c in the extending direction (sliding direction) of the wall 2. Also, the divided front block 3a, intermediate block 3b, and rear block 3c are respectively connected via connecting steel - frames 10. And as shown in FIG. 1(c), the roof framework 3 is assembled horizontally with respect to the pair of walls 2 constructed with an interval.

[0018] The roof finishing material 4 may be any member provided on the roof body 3 as long as it can cope with rain, snow, etc. In the present embodiment, the roof finishing material 4 provided on the upper chord member side of the roof body 3 is taken as an example, but for example, a soffit panel or the like may be provided on the lower chord member side of the roof body 3.

[0019] ≪≪Roof construction method≫≫ The construction method of the roof 5 of such a large - space structure 1 will be described with reference to FIGS. 2 to 8. The general procedure is as follows.

[0020] First, as shown in FIG. 2(b), the front - side block 3a is assembled above one end side of the wall body 2 and slid along the wall body 2 to a predetermined position. Next, as shown in FIG. 5(a), the intermediate block 3b is assembled at the position where the front - side block 3a is assembled.

[0021] The assembled intermediate block 3b is connected to the rear end of the front - side block 3a via the steel frame 10. Then, the connected intermediate block 3b and front - side block 3a are slid along the wall body 2 to a predetermined position as shown in FIG. 8(a). After that, the rear - side block 3c is assembled at the position where the front - side block 3a is assembled and connected to the rear end of the intermediate block 3b via the steel frame 10 as shown in FIG. 8(b). In the present embodiment, the roof body 3 is divided into three blocks, but when the roof body 3 is long, it is divided into three or more blocks and the above operations are repeated.

[0022] In the method of assembling the roof body 3 by adopting such a sliding method, the front - side block 3a, the intermediate block 3b, and the rear - side block 3c are all assembled at the same place on one end side of the wall body 2. Therefore, as shown in FIG. 2(a), the work stage 7 may be provided in a fixed space - saving area of the building space S, which is economical and enables the building space S to be efficiently used for other operations. Also, since the work areas of the operations carried out in these building spaces S and the assembly work of the roof body 3 do not interfere with each other, both operations can be carried out in parallel and simultaneously.

[0023] By the way, in the roof body 3 assembled by the above procedure, the front block 3a, the intermediate block 3b, and the rear block 3c are all known to cause vertical deflection due to their own weight when they are only supported by the wall body 2, such as vertical descent due to their own weight or expansion in the span direction (the direction of the arrangement interval of the wall bodies 2).

[0024] Furthermore, since the front block 3a has the overhang 31 at its end, deformation caused by this overhang 31 occurs. The deformation caused by the overhang 31 includes deformation occurring in the slide direction and the vertical direction. Therefore, in the method of constructing the roof, the roof body 3 is assembled while coping with these deformations, and the roof 5 of the large space structure 1 is constructed. The procedure will be described below.

[0025] ≪Preliminary Preparation≫ When adopting the slide method, as shown in Fig. 2(a), a work stage 7 is provided on one end side of the wall body 2 in the building space S, and a guide rail 21 is provided at the top end of the wall body 2.

[0026] On the guide rail 21, moving supports 6 such as sliding supports and rolling supports are arranged to support the front block 3a, the intermediate block 3b, and the rear block 3c respectively while traveling. In this embodiment, the guide rail 21 is formed on a trench with respect to the top end of the wall body 2, but it is not necessarily limited to this. Also, the moving support 6 may be self-propelled, or for example, a traction device may be provided on the wall body 2 to cause the moving support 6 to travel by traction.

[0027] The work stage 7 is supported by a plurality of temporary support stands 8 erected in the building space S. In this embodiment, a total of 12 stands, 3 in the span direction and 4 in the slide direction, are arranged, but the quantity is not limited in any way. And a plurality of telescopic devices 9 are placed on the work stage 7.

[0028] The telescopic device 9 is arranged to expand and contract in the vertical direction and is constituted by, for example, a hydraulic jack, and supports the front block 3a, the intermediate block 3b, and the rear block 3c of the steel truss structure when assembling them. Therefore, when constructing the front block 3a, etc. in advance, as shown in FIG. 2(b), the positions of the nodes N1 and N2 to which the lower chord members are connected are grasped.

[0029] Then, each of the plurality of telescopic devices 9 is arranged so as to be positioned directly below the node N2 located inside in the span direction among the nodes N1 and N2 of the front block 3a, etc. A movable support 6 is arranged directly below the node N1 located outside in the span direction among the nodes N1 and N2 of the front block 3a, etc.

[0030] ≪Assembly and Slide of Front Block 3a≫ First, as shown in FIG. 2(b), the front block 3a is assembled in advance on the work stage 7. The front block 3a is assembled in a state of being supported by the telescopic device 9 in a state where it has been extended by a predetermined amount in advance, as shown in FIG. 3(a).

[0031] The telescopic device 9 not only supports the front block 3a so as to be positioned above the wall body 2, but also, as shown in FIG. 3(b), the extension amount of each is controlled so as to be cambered. As described above, when the front block 3a is supported only by the wall body 2 by jacking down, a vertical deflection occurs.

[0032] Therefore, a camber value for causing a camber that is warped in the direction opposite to the deflection is calculated in advance in view of this deflection. Since the camber value is set for each telescopic device 9 that supports the front block 3a, based on this, the extension amount of each telescopic device 9 is controlled and managed.

[0033] After assembling the front block 3a in this way, lower it using a jack and move the front block 3a via the moving support 6 to support it on the paired wall bodies 2 as shown in Fig. 4(a). Then, due to the vertical descent caused by its own weight, the deflection of the front block 3a as shown in Fig. 3(b) decreases, and it assumes a state of maintaining horizontal on the wall body 2.

[0034] However, since the front block 3a has the protrusion 31 at the front end, it is in a state of being deformed in the sliding direction and the vertical direction as shown in Fig. 4(b) near the center in the span direction. Fig. 4(b) illustrates a state where the rear end floats at the center in the span direction. While allowing such deformation, move the moving support 6 along the guide rail 21 toward the other end side of the wall body 2 and slide the front block 3a to a predetermined position.

[0035] The sliding amount of the front block 3a is set in consideration of the size of the connecting steel frame 10 provided between the front block 3a and the intermediate block 3b to be connected next. As a result, the upper part of the telescopic device 9 is released, and the intermediate block 3b is assembled using the telescopic device 9.

[0036] ≪Assembly and forced deformation of the intermediate block 3b≫ As shown in Fig. 5(a), assemble the intermediate block 3b on the work stage 7. Similar to the assembly of the front block 3a, calculate the camber value in advance so as to cause a camber that is bent in the direction opposite to the expected downward deflection in the vertical direction. Then, as shown in Fig. 5(b), control and manage the elongation amount of each telescopic device 9 based on this camber value.

[0037] After assembling the intermediate block 3b, connect it to the preceding front block 3a. As described above, the front block 3a is in a state where deformation in the sliding direction is allowed. Therefore, as shown in Fig. 5(c), force the intermediate block 3b to deform so as to correspond to the deformed preceding front block 3a, and then connect the two using the connecting steel frame 10.

[0038] The forced deformation of the intermediate block 3b is carried out by adjusting the extension amount of the telescopic device 9 to adjust and lower the intermediate block 3b. Specifically, the front block 3a supported by the wall 2 is surveyed to grasp the deformed shape at the position where the connection of the connecting steel frame 10 is planned. Next, the deformed shape of the intermediate block 3b corresponding to this deformed shape is estimated. Then, the extension amount of each telescopic device 9 that realizes the estimated deformed shape is calculated, and the telescopic device 9 in the state of supporting the intermediate block 3b is controlled and managed so as to obtain the calculated extension amount. Keep it.

[0039] ≪Connection between the front block 3a and the intermediate block 3b≫ After forcibly deforming the intermediate block 3b in this way, as shown in Fig. 6(a), the intermediate block 3b is connected to the front block 3a via the connecting steel frame 10. At the time of connection, it is advisable to adjust the distance between the intermediate block 3b and the front block 3a as necessary. The distance adjustment can be easily performed by running the moving support 6 that supports the front block 3a along the guide rail 21.

[0040] As shown in Fig. 6(b), by forcibly deforming the intermediate block 3b corresponding to the deformed shape of the front block 3a, the centers of the bolt holes provided in the connecting steel frame 10 accurately coincide with the bolt holes provided in each of the front block 3a and the intermediate block 3b. Therefore, it becomes possible to efficiently perform the bolt fastening work of the connecting steel frame 10.

[0041] After the front block 3a and the intermediate block 3b are connected, jack-down is performed to support the intermediate block 3b only on the wall 2 via the moving support 6. Then, as shown in Figs. 7(a) and 7(b), the front block 3a and the intermediate block 3b are in a state where the deformation in the vertical direction and the slide direction is eliminated.

[0042] ≪Installation and slide of the roof finishing material 4≫ After that, the roof finishing material 4 is installed on the front block 3a, the connecting steel frame 10, and the intermediate block 3b.

[0043] After that, the moving support 6 is run along the guide rail 21 toward the other end side of the wall body 2, and the connected front block 3a and the intermediate block 3b are slid to a predetermined position. The sliding amount is set in consideration of the size of the connecting steel frame 10 provided between the intermediate block 3b and the rear block 3c to be connected next.

[0044] ≪Assembly of the rear block 3c≫ As shown in Fig. 8(a), assemble the rear block 3c on the work stage 7 released by moving the connected front block 3a and the intermediate block 3b.

[0045] Similar to the assembly of the front block 3a and the intermediate block 3b, calculate the camber value in advance so as to generate a warp in the direction opposite to the expected vertically downward deflection for the rear block 3c. Moreover, control and manage the elongation amount of each of the telescopic devices 9 based on this camber value.

[0046] After assembling the rear block 3c by supporting it with the telescopic device 9, as shown in Fig. 8(b), lower it by jacking down and support it on the wall body 2 via the moving support 6. At this time, since no deformation in the sliding direction has occurred in the intermediate block 3b, there is no need to perform the operation of adjusting and lowering to forcibly deform the rear block 3c.

[0047] After that, connect the rear block 3c to the intermediate block 3b via the connecting steel frame 10. Also, install the roof finishing material 4 on the rear block 3c and the connecting steel frame 10. Through these operations, as shown in Fig. 1(a), the roof 5 is constructed on the wall body 2 of the large - space structure 1.

[0048] As described above, according to the method for constructing a roof, since the front-side block 3a assembled in advance includes the projection 31, when the front-side block 3a is deformed in the sliding direction, the intermediate block 3b is forcibly deformed by adjusting and lowering using the expansion and contraction device 9 so as to correspond to this deformed shape. Thereby, the front-side block 3a and the intermediate block 3b can be easily connected, and the roof body 3 can be assembled efficiently with high precision, making it possible to construct the roof 5 of the large-space structure 1.

[0049] The method for constructing a roof of the present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present invention.

Explanation of Signs

[0050] 1 Large-space structure 2 Wall body 21 Guide rail 3 Roof body 31 Projection 3a Front-side block (preceding block) 3b Intermediate block (succeeding block) 3c Rear-side block 4 Roof finishing material 5 Roof 6 Moving support 7 Work stage 8 Temporary support stand 9 Expansion and contraction device 10 Connecting steel frame (connecting member) S Building space N1 Node (outer side) N2 Node (inner side)

Claims

1. A method for constructing a roof of a large - space structure in which a roof is supported by a pair of wall bodies facing each other in the span direction, comprising: After assembling a leading block above the wall body by supporting it on a plurality of telescopic devices on a work stage provided between the pair of wall bodies, and leading ahead of the leading block, the assembled leading block is supported on the wall body by shortening the telescopic devices, and is slid along the wall body. Behind the slid leading block, by supporting it on the telescopic devices, a trailing block is assembled above the wall body. The assembled trailing block is connected behind the leading block, and after the connected trailing block is supported on the wall body by shortening the telescopic devices, the leading block and the trailing block are slid along the wall body. Behind the slid trailing block, by supporting it on the telescopic devices, a rear - side block is assembled above the wall body. The assembled rear - side block is connected behind the trailing block, and after the connected rear - side block is supported on the wall body by shortening the telescopic devices, a roof framework constituting the roof is assembled. The leading block has a protrusion at the front - side end in the sliding direction along the wall body, and is assembled with a curvature anticipating the vertical downward deflection occurring when supported on the wall body. Then, by shortening the telescopic devices and supporting it on the wall body, at the time of sliding along the wall body, it is in a state of being deformed in the sliding direction and the vertical direction. The assembled trailing block controls the elongation amount for each of the plurality of telescopic devices. After connecting to the leading block and then shortening the telescopic devices to support it on the wall body, the trailing block is deformed into a shape such that the deformation occurring in the sliding direction and the vertical direction between the leading block and the trailing block is eliminated, and then is connected to the leading block. A method for constructing a roof is characterized by this.

2. In the method for constructing a roof according to Claim 1, A method for constructing a roof, characterized in that the leading block and the trailing block are connected via a connecting member.

Images