JP2985110B2 - Construction method of steel roof - 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 of constructing a large and heavy steel roof such as a dome shape.

[0002]

2. Description of the Related Art For example, Japanese Unexamined Patent Publication No. Hei 3-290550 discloses that a dome frame (dome-shaped roof) composed of a large number of arched steel trusses is installed on a lower structural body.
An erecting gantry is placed at the center of the erection area (center of the dome), and one or more steel trusses are erected between the erection gantry and the lower structure frame from the end of the erection area, and the erecting steel trusses are joined together. By sequentially rotating and moving around the gantry, a large number of steel trusses are radially arranged to construct a lower dome frame (child roof), and then the steel truss at the end of the dome frame is used for a work stage. A construction method is described in which an upper-layer dome frame (parent roof) is erected by the same operation procedure as that of the dome frame.

[0003]

However, this method has the following problems. The construction of the lower dome frame (child roof) is performed on the erection gantry and the lower structure frame, and the construction of the upper dome frame (parent roof) is performed using the lower dome frame as a work stage after the construction of the lower dome frame. The construction period is the sum of the construction period of the lower structural frame and the construction period of the lower dome frame, and further includes the construction period of the upper dome frame, resulting in an extremely long overall construction period.

[0004] Regarding the construction of the upper dome frame (parent roof), the workability and economy are good because the lower dome frame (child roof) can be used as a work stage. At the center of the range, that is, at the center of the dome with the highest height, build a erection gantry with a height equivalent to the height of the dome center at the time of completion, and install the lower framing unit at a high place between this erection gantry and the lower structure skeleton. The assembling requires a high erection gantry and a plurality of work stages at a high place between the erection gantry and the substructure, resulting in high construction cost.

[0005] The steel truss must be assembled by lifting a steel truss divided body (steel truss unit) on a high erection gantry and a work stage at a high place with a crane, and work at high places is not only poor in workability but also dangerous. It is expensive and requires a large crane.

[0006] The horizontal thrust load from the steel truss is dealt with by supporting each steel truss unit via a roller at each work stage. There is a danger that it may move due to the bearing, and since the assembly is originally at a high place, special consideration is required for work and equipment, and there is a problem that the danger is further increased.

[0007] An object of the present invention is to make it possible to assemble a roof with a steel truss on the ground (so-called framing) in parallel with the construction of a substructure, and in a stable state in which the horizontal thrust load of the steel truss is reduced. The object of the present invention is to significantly shorten the construction period, improve workability and safety. Also,
It is possible to lift a grounded steel roof up to a lower structural frame in a stable state with a simple lift-up device without using heavy equipment such as a large crane.

[0008]

According to the present invention, a steel truss assembling step of assembling each steel truss on the ground while supporting the traverse on a laterally movable rail on a temporary mast capable of lateral movement, and combining the assembled steel truss with the temporary mast. A steel roof is laid by sequentially repeating a horizontal movement process of moving a predetermined amount along the horizontal movement rail and a joining process of joining the steel trusses together, and then the steel roof is laterally moved and a temporary mast. And the steel roof is re-mounted on the lower structure frame by moving the rail on the rail for lateral movement.

[0009] In the case of a curved steel truss, a temporary mast is supported from the lower side at the left or right intermediate two positions at or near the point where the horizontal thrust loads on the left and right portions of the truss are offset by the reaction force due to its own weight. assemble.

[0010] As a preferred lift-up method, the lateral moving rail is supported on left and right lifting yokes that respectively move up and down along a tower built on the ground, and after a steel roof is grounded, a lifting yoke by a lifting jack is used. The lifting of the lifting yoke in a stepwise manner by alternately repeating the lifting of the predetermined stroke of each stroke and the stacking of the pistons supporting the load of the lifting yoke, thereby lowering the steel roof together with the lateral moving rail and the temporary mast. Lift up to the height of

In the case of an openable roof, a reinforced steel roof is installed on a trolley that can travel on the lower structural body.

[0012] The steel truss is preferably connected laterally by wires or the like and laterally moved and lifted up while the left and right horizontal thrust loads are offset each other.

[0013]

According to the present invention, the steel truss is supported on the temporary mast and assembled on the ground, and the assembled steel truss is laterally moved along the rail for lateral movement together with the temporary mast while being supported by the temporary mast. It is joined with a steel truss assembled in the same way, and the steel roof is laid by repeating this. Therefore, all the work of assembling the steel frame roof can be performed on the ground, and at the same time, the work of constructing the substructure skeleton can be performed. Then, while supporting the laid steel roof on the temporary mast, the rails for lateral movement are lifted up to the height of the lower structure frame, and the entirety is laterally moved along the rails for lateral movement to perform the lateral movement. By re-transferring from the rail to the lower structure, the entire steel roof can be installed on the lower structure at once. The temporary mast may be removed at the time of reprinting or after the reprinting is completed.

When the steel truss is curved, a horizontal component of the weight of the steel truss acts on the left and right temporary masts. Then, the left and right component forces become opposite horizontal reaction forces to the steel truss, and the horizontal thrust load generated by the curved steel truss is canceled by the horizontal reaction force from the left and right temporary masts. Will be.

Therefore, if the right and left support points of the steel truss by the left and right temporary masts are appropriately selected, the horizontal thrust load generated from the steel truss can be increased by the horizontal reaction force acting as a reaction of the own weight of the steel truss on the temporary mast. Theoretically, they can be canceled out, and even if they cannot be completely canceled out, it is possible to make a state where only a very small horizontal thrust load remains.

The lift of the grounded steel roof is performed by alternately repeating the lifting of the lifting yoke by a push-up jack by a predetermined stroke and the stacking of the pistons supporting the load of the lifting yoke, so that the lifting yoke moves along the tower. Since the steel roof is increased stepwise, it can be safely and efficiently performed in a stable state even with a large and heavy steel roof.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the present embodiment, for example, three types of steel roofs, that is, a curved parallel roof that opens and closes by moving back and forth in parallel on the lower structure skeleton 1 on the lower structure skeleton 1 on which the audience seats and the like are provided as shown in FIG. In the construction of an open / close dome-type stadium provided with a rotating roof 3 that rotates and opens and closes and a spherical fixed roof 4 fixed on the lower structural frame 1, a parallel roof (steel frame roof) 2 is used. The case of erection on the lower structural body 1 will be described.

The parallel roof 2 is assembled on the ground and mounted on the left and right walls 5 of the lower structural frame 1 so as to be straddled. FIG. 2 is a plan view showing the layout of the assembling work, and a temporary support for supporting the material stock yard 6 and the steel truss from a place far from the lower structural frame 1 on the ground in front of or below the lower structural frame 1 under construction. Temporary mast framing area 7 for mast framing, left and right truss block framing areas 8.9 for truss block framing as elements of steel truss, joint of steel truss framing and steel truss Move horizontally to get a parallel roof 2
To secure a roof framing area 10.

In the roof framing area 10, firstly, a pair of towers 11 are vertically set on the ground (four pairs for each of the left and right sides in the example in the figure) at a plurality of front and rear portions on the left and right along parallel left and right lines. Tower 11 before and after each
The lateral movement rail 12 is installed horizontally as described later. Further, with respect to the front and rear ends of the lateral movement rail 12, assuming that the far side with respect to the lower structural frame 1 is the start end and the near side is the end, as shown in FIG. 2 and FIG. As shown in FIG. 4, a pair of front and rear assembling vents 1 are arranged on the ground at the center position between the start ends of the left and right lateral movement rails 12 in order to assemble one set (one span) at a time.
Stand 4 vertically in close proximity. Further, a pair of left and right mast receiving tables 15 are respectively installed on the left and right outside of the starting end of the left and right horizontal moving rails 12, and a pair of front and rear assembling auxiliary tables 16 are further installed on the left and right sides thereof. A pair of front and rear transverse carriages 17 is installed on each of the movable rails 12. FIG. 17 is a schematic plan view showing the first such installation state.

As shown in FIG. 3, the steel truss 13 is provided with a temporary mast 18 on each of the laterally moving carts 17 (FIG. 18).
Indicates the state at this time), and the left and right halves are respectively supported by the left and right temporary masts 18 around the assembly vent 14 set in the center. That is,
A truss block composed of steel members in a truss structure in the left and right truss block framing areas 8.9 is a crane 19 (Fig. 5).
The right and left sides of the pair of front and rear assembling vents 14 (FIG. 6) and the right and left sides respectively extend from the assembling vents 14 to the assembling auxiliary table 16 and furthermore, a temporary mast 18 is provided.
Then, the left and right intermediate parts are sequentially connected so as to be supported from below, and the one-span steel truss 13 is assembled in an arch shape. In this case, the assembling vent 14 and the assembling auxiliary table 16 are used.
Is used as a temporary support only when assembling the steel trusses 13 one by one. FIGS. 3, 4, 6, and 19 show the state at this time.

Each of the left and right temporary masts 18 is a main mast 18 which is supported vertically at a lower end on a laterally moving carriage 17.
a, an inclined auxiliary mast 18b extending obliquely toward the assembly vent 14, and a horizontal auxiliary mast 18c extending horizontally from the carriage 17 to the mast receiving base 15. These three masts 18a, 18b,. The tip of 18c is pin-joined to the lower chord of the steel truss 13, and the load of the steel truss 15 is supported mainly from below by the main mast 18a.

Therefore, the weight of the assembled steel truss 13 is mainly applied to the left and right main masts 18a at the intermediate portions of the left and right, and the main masts 18a are
Since the steel truss 13 has an arch shape, a horizontal component force also acts. The left and right component forces become opposite horizontal reaction forces to the steel truss 13, and the horizontal thrust load generated from the steel truss 13 due to the formation of the arch forms a horizontal reaction force from the main mast 18 a. It will be canceled by power.

Therefore, the left and right main masts 18a
If you choose the right and left support points of the steel truss 18 appropriately,
The horizontal thrust load generated from the steel truss 13 can be theoretically offset by the horizontal reaction force acting as a reaction of the weight of the steel truss 13 against the main mast 18a. It is possible to leave only a load, and the above-mentioned left and right support points are selected at positions where such a state can be achieved by design.

The steel truss 13 has only a slight horizontal thrust load by being supported on the left and right temporary masts 18 as described above. However, the remaining horizontal thrust load is offset on the left and right sides by each other. Both ends are connected by a horizontal thrust load processing wire 20.
In this example, a wire 20 is stretched in parallel to the front and rear of each steel truss 13, and each wire 20 is tensioned by a tensioning device 21.

FIG. 7 shows an example of the tensioning device 21. The tensioning device 21 is provided with a left and right connecting tool 22 for turning a buckle 23.
The left and right wires 20 are connected to the left and right connectors 22 respectively, and the ends of these wires are connected to both ends of the steel truss 13 respectively. To moderate tension.

8 to 10 show another example of the tensioning device 21. FIG. The tensioning device 21 includes a hydraulic cylinder 24, a fixed collet chuck 25 fixed to a base end of the cylinder body 24a, and a movable collet chuck 26 fixed to a distal end of a hollow biston rod 24b. A wire 20 having a continuous frustoconical node 20a is provided.
The wire 20 is made to penetrate the movable collet chuck 26, the hydraulic cylinder 24, and the fixed collet chuck 25. In this tensioning device 21, the piston rod 24 b is held while the wire 20 is clamped by the fixed collet chuck 25.
8 and 9, the wire 20 is clamped by the movable collet chuck 26, and then the piston rod 24b is contracted as shown in FIG. Is pulled toward the fixed collet chuck 25, and by repeating this, the wire 20 can be tensioned.

Arch-shaped steel truss 1 that has been assembled
In order to assemble the next steel frame truss and to join the same, the steel truss 13 is moved along the horizontal rail 12 and the steel truss 13 is supported by the left and right erection masts 18 so that the steel truss 13 is supported by the lower structural frame. Move to the side 1 and remove it from the assembly vent 14, the mast receiving table 15, and the assembly auxiliary table 16. In this case, two wires 20 around the front and back are stretched in parallel on the steel truss 13 for horizontal thrust load processing as described above, and the center of the steel truss 13 is a pair of front and rear assembly vents 14 during assembly. Because they are provisionally accepted,
When the steel truss 13 is moved laterally, the wire 20 interferes with the assembly vent 14. Therefore, in order to avoid this, the retreat operation of the assembly vent 14 is performed as follows.

As shown in FIGS. 5 and 11, the front and rear assembly vents 14 are provided with lateral V through which the front and rear wires 20 pass.
The wire truss 13 is provided with a
Is closed by the cover plate 28 so that the wire 20 does not come off from the wire penetrating concave portion 27 until the wire is moved laterally. And
When moving laterally, open the cover plate 28 as shown in FIG.
The wire 20 is made to come out of the wire through recess 27. At this time, the wire 20 is guided by the lid 28.

As shown in FIG. 5, the front and rear assembly vents 1
4, the lower structure skeleton 1 side includes a moving winch 2.
By winding the moving wire 30 at 9, the moving wire 30 can be moved back and forth on the rail 31 laid on the ground, and can be lifted off the rail 31. Therefore, this one side assembly vent 1
13 is moved to the lower structural skeleton 1 side as shown in FIG. 13 until it comes off the steel truss 13, the assembling vent 14 is lifted by the crane 19, and in this state, the steel truss 13 is moved from FIG. Then, the assembling vent 14 is suspended and returned to the original position as shown in FIG.

When the assembled steel truss 13 is laterally moved in this way, as shown in FIG. 20, a joint truss 32 having a simple structure is subsequently assembled and installed, and the next steel truss 13 is mounted in the same manner as described above. 17 and 18, the front and rear steel trusses 13 are joined to each other via the joining truss 32. Hereinafter, the same operation is repeated until the final steel truss 13 is assembled as shown in FIG.
The parallel roof 2 joined sequentially through the ground is laid.

The laid parallel roof 2 is lifted up as a whole together with the left and right lateral moving rails 12. In this embodiment, the following lift device is used as a lift-up device. As shown in FIGS. 25 and 26, each pair of towers 1
1 is provided.

In FIG. 26, each tower 11 is provided with an elevating plate 34 which moves up and down along two climbing guide rails 33 which are pillars thereof, and a lifting yoke is provided between the opposing elevating plates 34 of both towers 11. 3
5 are installed. Then, as shown in FIG. 25, the left lateral movement rail 12 is mounted on the lifting yokes 35 of a plurality of pairs of towers 11 disposed on the left and front, and the right lateral movement rail 12 is On the right side, it is mounted on the lifting yokes 35 of a plurality of pairs of towers 11 arranged in front and rear.

As shown in FIG. 26, for each climbing guide rail 33, a push-up jack 36 is provided at the lower end, and a piston supply guide 37 and a lock plate guide rail 38 are provided on the side. Piston supply guide 37
The guide guides the separated pistons 39 one by one into the climbing guide rails 33 so that a plurality of pistons 39 can be set on the piston supply guide table 37 in a line. Has become. The lock plate guide rail 38 guides a separately prepared lock plate 40 into and out of the climbing guide rail 33.

The lifting yoke 35 is lifted up by simultaneously performing the following operations on the opposing tower 11. As shown in FIG. 27, at the first stage, the lift head 41 of the lifting jack 36 is lowered at each climbing guide rail 33, and the lock plate 40 is pulled out from the climbing guide rail 33. In this state, one piston 39 is inserted into the climbing guide rail 33 and rests on the lift head 41.

The lifting jack 41 is extended, the lift head 41 is raised by a predetermined stroke, and the lifting plate 34 is pushed up through the piston 39, whereby the lifting yoke 35 is lifted up by one stage. Next, as shown in FIG. 28, after the lock plate 40 is inserted into the climbing guide rail 33, the push-up jack 36 contracts and the lift head 41 is lowered as shown in FIG. The load is supported by the lock plate 40 via the piston 39.

Next, a new piston 39 is inserted into the climbing guide rail 33 as shown in FIG.
After the lifting yoke 35 is pulled out from the inside, the lifting jacks 36 are extended again and the lift head 41 is raised by a predetermined stroke, so that the lifting yoke 35 is further lifted up by one step. Hereinafter, the lifting yoke 35 can be lifted up one step at a time by repeating such an operation and stacking the pistons 39 one by one.

When the parallel roof 2 is completed as described above (FIG. 21), the towers 11 arranged on the left, right, front and rear are added to the required height as shown in FIG. The yoke 35 is simultaneously lifted up one step at a time by the above-described operation, and the laid parallel roof 2 is moved together with the left and right lateral movement rails 12 to the height of the left and right walls 5 of the lower structural frame 1 as shown in FIG. Lift up. On the other hand, on the lower structure skeleton 1 side, for example, a bogie 42 as shown in FIG.

Next, the parallel roof 2 is laterally moved to the lower structure skeleton 1 along the left and right lateral movement rails 12, and only the tip of the parallel roof 2 is placed on the left and right wall portions 5 as shown in FIG. The steel truss 13 at the tip is connected to both ends of the steel truss 13 and the bogies 42 on the left and right sides. Next, as shown in FIG. 23, the steel truss 1 having been connected to the bogies 42 is finished.
3 After removing the left and right temporary masts 18, the parallel roof 2
Is further advanced along the left and right lateral movement rails 12 on the left and right wall portions 5, and the same operation is repeated to install the entire parallel roof 2 so as to be able to move in parallel between the left and right wall portions 5 as shown in FIG. 24. I do. The removal of the horizontal thrust load processing wire 20 may be performed simultaneously with the removal of the left and right erection masts 18 or before or after that.

FIGS. 34 and 35 show another embodiment. In this case, the arched steel frame truss 13 is assembled by directly supporting the left and right ends on the lateral movement carriage 17 without using the temporary mast 18 as in the above-described example. Then, the assembled steel truss 13 is laterally moved along the lateral movement rails 12 at the left and right ends to assemble the next steel truss 13, and the steel trusses 13 are joined to each other. This is repeated to repeat the dome-shaped steel roof 2a. To lay the ground. Thereafter, the lifting yoke 35 supporting the lateral movement rail 12 is pushed up one step at a time in the same manner as described above, so that the steel roof 2
a is lifted up to the level of the lower structure skeleton (not shown) together with the left and right lateral movement rails 12, and the steel roof 2 a is laterally moved along the left and right lateral movement rails 12 so as to be positioned on the lower structure skeleton. Reprinted in

[0040]

According to the present invention, the following effects can be obtained. All the work of assembling the steel frame roof can be performed on the ground, and at the same time, the work of constructing the substructure skeleton can be performed simultaneously, so that the construction period can be significantly reduced.

After the steel roof is laid, it is lifted up and installed on the lower structural body, so that a work stage or a large crane for work at a high place is not required, so that construction costs can be reduced and workability is good.

Since each steel truss is assembled and lifted up while being supported by the temporary mast, the horizontal thrust load can be reduced, the horizontal thrust load processing device can be simplified, and the steel roof can be erected with less risk. And can be installed on the substructure frame. It is even better to assemble and lift up the steel truss while supporting it with the temporary mast at the right and left intermediate two positions near or at the point where the horizontal thrust load is offset by the reaction force due to its own weight.

The lift of the grounded steel roof is alternately repeated by pushing up the lifting yoke by a push-up jack by a predetermined stroke and stacking pistons supporting the load of the lifting yoke, so that the lifting yoke is moved along the tower. If it is raised stepwise, it can be safely and efficiently performed in a stable state even with a large and heavy steel roof.

[Brief description of the drawings]

FIG. 1 is a perspective view of an open / close dome stadium showing an application example of the method of the present invention.

FIG. 2 is a schematic plan view of an example of a work layout for implementing the method of the present invention.

FIG. 3 is a front view showing an assembling mode of a steel truss in the method of the present invention.

FIG. 4 is a side view of the same.

FIG. 5 is an enlarged side view of the same.

FIG. 6 is an enlarged front view showing only a left half of FIG. 4;

FIG. 7 is a front view of an example of a tensioning device that tensions a horizontal thrust processing wire.

FIG. 8 is a schematic sectional view of another example of the tensioning device.

FIG. 9 is a schematic cross-sectional view of the tensioning device in an extension operation state.

FIG. 10 is a schematic sectional view showing a contraction operation state of the tensioning device.

FIG. 11 is a cross-sectional view showing a part of the pair of front and rear assembly vents for temporarily receiving the center of the steel truss, through which the horizontal thrust processing wire passes.

FIG. 12 is a cross-sectional view showing a state where a cover plate is opened in the above.

FIG. 13 is a side view of a state in which one of the assembling vents is retracted in order to laterally move the assembled steel truss by a predetermined amount.

FIG. 14 is a side view of a state in which the steel truss is laterally moved.

FIG. 15 is a side view showing a state where the lateral movement of the steel truss has been completed.

FIG. 16 is a side view showing a state where the retracted assembly vent is returned to an original position.

17 to 24 sequentially show the working steps of the method of the present invention, and FIG. 17 is a schematic plan view of an initial installation step.

FIG. 18 is a schematic plan view of a temporary mast setting step.

FIG. 19 is a schematic plan view of a steel truss assembling step.

FIG. 20 is a schematic plan view of a steel truss joining step.

FIG. 21 is a schematic plan view of a final roofing process of a parallel roof using a steel truss.

FIG. 22 is a schematic plan view showing a process of lifting up a parallel roof after completion of the terrain and installing the parallel roof on a lower structural body.

FIG. 23 is a schematic plan view of a temporary mast removal process.

FIG. 24 is a schematic plan view showing a state where installation of a parallel roof is completed.

FIG. 25 is a front view of a tower for performing the lift-up and a lift-up device mounted on the tower.

FIG. 26 is a perspective view of the same.

FIG. 27 is a perspective view showing an initial stage of a lift-up operation of the lift-up device.

FIG. 28 is a perspective view of a second step of the above.

FIG. 29 is a perspective view of the third stage.

FIG. 30 is a perspective view of the fourth stage.

FIG. 31 is a front view of a state in which the tower is added to lift up a parallel roof by a steel truss.

FIG. 32 is a front view showing a state where lift-up is completed.

FIG. 33 is a schematic sectional view of a bogie having a parallel roof running on a lower structural body.

FIG. 34 is a front view showing another embodiment.

FIG. 35 is a side view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower structure frame 2 Parallel roof (steel frame roof) 11 Tower 12 Lateral movement rail 13 Steel truss 18 Temporary mast 20 Horizontal thrust load processing wire 35 Lifting yoke 36 Push-up jack 39 Piston 42 Bogie bogie

Claims (5)

(57) [Claims] 1. A steel truss assembling step of assembling each steel truss on the ground by supporting a laterally movable temporary mast on a laterally moving rail, and placing the assembled steel truss together with the temporary mast along the laterally movable rail. After sequentially repeating the lateral movement process of laterally moving the fixed amount and the joining process of joining the steel trusses together to form a steel roof, the steel roof is lifted up together with the lateral moving rail and the temporary mast, and the lateral movement is performed. A method of constructing a steel-frame roof, characterized in that only a steel-frame roof is transposed and erected on a lower structure frame by laterally moving on a rail for use. 2. The temporary mast supports each curved steel truss from the lower side at the right and left intermediate two positions near or at a point where the horizontal thrust load on both left and right portions is offset by a reaction force due to its own weight. The method according to claim 1, wherein the steel roof is assembled. 3. The rails for lateral movement are supported on left and right lifting yokes that respectively move up and down along a tower built on the ground, and a steel roof is erected. The steel roof is lifted up to the height of the lower structural body together with the lateral moving rail and the temporary mast by raising the lifting yoke stepwise by alternately repeating the lifting and the stacking of the pistons supporting the load of the lifting yoke. The method for constructing a steel roof according to claim 1 or 2, wherein the steel roof is constructed. 4. The steel roof according to claim 1, wherein the reinforced steel roof is re-installed on a trolley capable of traveling on the lower structural body. Method. 5. The steel frame according to claim 1, wherein both ends of said steel frame truss are connected by a wire or the like, and the steel truss is laterally moved and lifted up in a state where left and right horizontal thrust loads are offset. How to build the roof.