JPH11301973A - Crane for tower execution and stage lifintg up execution method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce costs and to shorten the period of execution by eliminating a long and large crane mast rising from the ground of a tower crane and foundation work only for the crane mast, reducing a large number of mast members and replacements thereof and the time and labor of demolition, and constructing an internal structure during frame body execution. SOLUTION: Upper first stage 7 and lower second stage 8 used for the construction of a skelton are supported by built steel frames 2 and 19 and an executed skelton 3, skeltons are sequentially built upward by consecutive stepping up, a tower crane 9 necessary for execution is supported by the first and second stages 7 and 8, and a timing is set corresponding to the stepping up of both stages 7 and 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tower construction crane and a stage lift-up construction method.

[0002]

2. Description of the Related Art In recent years, various designs have been adopted for a super high-rise tubular concrete structure (hereinafter referred to as a tower), and in many cases, it cannot be constructed by a conventional slip-form method or the like. In addition, when assembling a scaffold and a crane from the ground, the construction period is inevitably prolonged, and the danger is increased. In view of such a point, the present applicant has previously developed a climbing stage method (Japanese Patent Application Laid-Open No. 6-146578). In this construction method, a plurality of work stages are arranged up and down inside the tower to be built, and these work stages are raised one by one, while performing necessary construction work on these work stages. , Building up the tower gradually and eventually,
The used work stage is fixed on the upper part of the tower as a permanent member. By the way, in this climbing stage method, a tower crane is used in the implementation. This tower crane is mounted on the upper end of a crane mast that stands from the ground inside a tower body to be built, and the crane mast is extended upward in accordance with the progress of the construction work, and the crane is sequentially raised. And
Finally, dismantle and remove them all.

[0003]

However, since this tower crane requires a long crane mast that rises from the ground, foundation work that is unnecessary only for the crane mast, which is unnecessary for the tower itself, is required. A large number of mast members are required, it takes time and effort to replace, and it is not easy to dismantle and remove. The internal structure cannot be built during construction of the frame. There are problems. The present invention aims to solve such problems by eliminating such a crane mast, and at the same time, to reduce costs and shorten the construction period.

[0004]

In order to achieve the above object, an invention according to claim 1 is a steel frame or an already-constructed frame constructed by constructing an upper first stage and a lower second stage to be used for construction work of the frame. Parts, and successively step up to build a frame sequentially upwards. Also, the tower crane required for construction is supported by the first stage and the second stage, and both stages are stepped up. It is characterized by climbing correspondingly.

According to a second aspect of the present invention, the upper first stage, on which the hanging scaffold is suspended, is supported by a section of steel frame that has been constructed.
A lower second stage disposed below the first stage,
The supported skeleton under the steel frame is supported, and the tower crane required for the construction is penetrated and inserted into the first stage with a gantry to be supported on the second stage. Using a tower crane and the first
The stage is stepped up several times with small pitches together with the suspended scaffolds to perform several layers of required concrete work. Then, the tower crane is used to climb the first stage by using the reaction force, and the second stage is enlarged. Step up at the pitch and support it again on the second stage. Then, use the tower crane to construct the next section of steel frame, and then repeat these steps to build a frame sequentially upward. It is characterized by the following.

[0006] The invention of claim 3 is claim 1 or claim 2.
The step-up of the first stage is performed by a first chain block temporarily installed on the upper end of the steel frame constructed, and the step-up of the second stage is performed. And the step-up of the tower crane is carried out by equipping the crane with the climbing means by a climbing means provided on the crane so that the crane can move up and down. .

According to a fourth aspect of the present invention, there is provided the tower construction crane and the stage lift-up construction method according to any one of the first, second, and third aspects, wherein the steel frame is assembled to the outer wall surface of the frame to be constructed. Use pre-cast semi-finished concrete slabs, perform required concrete work using on-site assembled formwork on the inner wall surface, and fix the first stage and the second stage to the building as permanent members at the upper limit of step-up. To make it happen.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (1) to (13) of FIGS.
An embodiment of the invention according to claims 1 to 4, wherein a super-high-rise chimney having a "diaper" shape (FIG. 4) whose planar shape is a substantially equilateral triangle and each side bulges in an arc shape. FIG. 3 illustrates a series of steps for constructing (FIG. 3).
Hereinafter, this will be described in detail in order.

(1) Start A steel frame 2 of the first section is constructed on a foundation 1 and a steel reinforced concrete frame 3 corresponding to the steel frame is constructed. For the construction of the skeleton part 3, a framed scaffold temporarily provided on the ground (not shown)
Concrete construction of four layers is carried out by using a plurality of permanent jaws 4 for supporting the second stage at various places on the inner surface of the first and fourth layers.
In the concrete work of each layer, a semi-finished precast concrete slab (hereinafter, referred to as Pcf) 5 of the outer wall of the skeleton is incorporated into the steel frame 2 and a formwork 23 for on-site assembly is provided corresponding to the inner wall, Reinforcement is provided in the formwork, concrete is cast and spliced, and after the cast concrete has a predetermined strength, the form is dismantled and removed. However, the dismantling and removal of the form 23 of the fourth layer is described in (3) below.
It may be performed in a process. A plurality of temporary jaws 6 for supporting the first stage are attached to various places on the inner surface of the upper part of the remaining steel frame 2 (column),
The first stage 7 is supported by these temporary jaws 6. Further, the second stage 8 is supported by the plurality of permanent jaws 4 via the receiving beam 10. On the second stage 8, the gantry 11 of the tower crane 9 having the stanchion 13 erected from the gantry 12 is placed on the gantry 12, and the stanchion 13 of the gantry 11 penetrates into the first stage 7. And the climbing device 14
The crane 15 having the is lifted and lowered by the climbing device 14. Then, a hanging scaffold 16 is erected from the wall of the first stage 7. This hanging scaffold 16
An under-scaffold frame 17 is suspended via a rigid suspension member (not shown) suspended from the first stage 7, and a plurality of layers of frame scaffolds 18 are assembled and formed on the under-scaffold frame. Further, a plurality of second chain blocks 26 for the second stage step-up are temporarily suspended from appropriate positions of the under-scaffold frame 17 of the suspended scaffold 16. Note that the first stage 7 and the second stage 8 are formed by laying a scaffold plate (a permanent floor material may be used) on a steel frame which is finally fixed as a permanent member.

(2) Steel frame construction A steel frame 19 of the second section is constructed on the steel frame 2 of the first section. On this steel frame 19, projecting beams 20 are temporarily provided at several places (column tops) at the upper end, and first chain blocks 21 for the first stage step-up are respectively temporarily suspended from the projecting beams, and these first chains are suspended. The hanging chains 22 of the blocks are each mechanically linked to the first stage 7.

(3) First Stage Lifting and Concrete Work (Pcf Installation, Formwork, Reinforcement) Each first chain block 21 for the first stage is operated to move the first stage 7 to the second section steel frame. Step up by one step of small pitch suitable for the first layer concrete work in 19, a plurality of the temporary jaws 6 are replaced with the appropriate positions on the inner surface of the steel frame 19 of the second section, and the temporary jaws 6 are placed in the first stage. 7 is supported. Further, the tower crane 9 is operated to lift various members, and the hanging scaffold 16 is used to attach the Pcf of the outer wall of the first layer of the second section to the steel frame 19 of the second section.
5 is attached, and then the formwork 23 on the inner wall surface is assembled, and reinforcement is provided in the formwork. At this time, the formwork 23 of the first section and the fourth layer is also dismantled and removed.

(4) Concrete Work (Concrete Casting) and Formwork Removal Concrete 24 of the second section and first layer is cast into the formwork 23 and is joined to the first section and fourth layer of concrete. .

(5) First stage ascent and concrete work (Pcf installation, formwork, reinforcement) Each first chain block for the first stage again
By operating the tower crane 9 and using the suspension scaffold 16, the first stage 7 is stepped up and supported in the same manner as in (3), and the steel frame 19 of the second section is operated.
Then, Pcf5 on the outer wall surface of the second section and the second layer is attached, the formwork 23 on the inner wall surface is assembled, and reinforcement is provided in the formwork. On this occasion,
Section 2 Demolition and removal of the formwork 23 of the first layer.

(6) Concrete work (concrete casting) and formwork removal As in the case of (4), concrete 24 of the second section and second layer is poured into the formwork 23 and Transfer to one layer of concrete.

(7) First Stage Lift and Concrete Work (Pcf Installation, Formwork, Reinforcement) As in the cases of (3) and (5), each first chain block 21 for the first stage is again mounted. The first stage 7 is stepped up and supported, the tower crane 9 is operated, and the hanging scaffold 16 is used to attach the second section steel frame 19 to the outer wall of the second section third layer. Attach Pcf5,
A formwork 23 for the inner wall surface and a plurality of permanent jaws 4 for supporting the second stage is assembled, and a required reinforcing arrangement is provided inside the formwork. At this time, the mold 23 of the second layer and the second layer is also dismantled and removed.

(8) Concrete work (concrete casting), formwork removal and girder removal As in the cases of (4) and (6), concrete 24 of the second section and third layer is placed in the formwork 23. Pour in and transfer to concrete of section 2 second layer concrete. Further, the respective projecting beams 20 at the upper end of the steel frame 18 are removed together with the respective first chain blocks 21.

(9) Climbing device set The climbing device 14 of the tower crane 9 is placed on the receiving beam 25 previously arranged at an appropriate position on the first stage 7, and the climbing device is supported by the first stage 7.

(10) Second stage chain block set and pedestal lift The suspension chains 27 of each second chain block 26 for the second stage are mechanically connected to the second stage 8, respectively. By operating the climbing device 14 of the tower crane 9, a reaction force is applied to the first stage 7 to raise the gantry 11 sufficiently.

(11) Second Stage Ascent The second stage blocks 26 for the second stage are operated to step up the second stage 8 at a large pitch. It is supported via the beam 10.

(12) Mounting the gantry The climbing device 14 of the tower crane 9 is operated in reverse to lower the gantry 11 slightly, and the gantry is set on the second stage 8 again.

(13) Crane Lifting The climbing device 14 is operated to move the crane 15 to the base 11
Up to the upper end, ie, the upper end of the support portion 13.

Thereafter, the steps (1) to (13) are repeated to sequentially build the frame upward. Note that the dismantling and removal of the mold 23 of the second layer and the third layer may be performed according to the above-described procedure in the subsequent steps. Finally, the first stage 7
And the second stage 8 is fixed as a permanent member to the frame in the frame, and the super-high-rise structure shown in FIGS. 3 and 4 is in the shape of a "diaper" in which the planar shape is substantially equilateral triangle and each side bulges in an arc shape. Complete the chimney. In FIG. 3, 28 is backfilled earth and sand. Although omitted in FIGS. 1 and 2 and the above description, a construction elevator (which can extend rails and the like in accordance with the progress of construction) and a second construction from the ground to the second stage 8 are provided. Stage 8 to 1
A temporary staircase may be used up to the stage 7. However, these elevators and stairs can be used for construction work by installing the elevators and stairs at an early stage together with the construction of the frame.

In the above embodiment, the case where a super-high-rise chimney having a planar shape "diameter" is constructed has been described. However, the present invention is not limited to this, and various towers such as cylindrical structures having various forms are provided. Of course can be applied to the construction of

[0024]

According to the present invention, there is no need for a tower crane having a long crane mast that rises from the ground. Therefore, there is no need for foundation work only for the crane mast, which is unnecessary for the tower body itself. There is no need to remove the crane mast foundation. There is no need for a large number of mast members for a long crane mast, and there is no need to replace masts or dismantle them after construction is completed. During the construction of the skeleton, the construction of the internal structure and the construction of the interior can be performed in the already constructed skeleton. In general, costs can be reduced and the construction period can be shortened. It has excellent effects.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a first half of a process showing an embodiment of a tower construction crane and a stage lift-up construction method of the present invention.

FIG. 2 is an explanatory view of the latter half of the process.

FIG. 3 is a central longitudinal side view showing a super-high-rise chimney having a planar shape “diameter” constructed by the construction method of the present invention.

FIG. 4 is an enlarged plan view of the chimney.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Foundation 2 ... Steel frame of 1st section 3 ... Body part 4 ... Main jaw 5 ... Pcf (semi-product precast concrete slab) 6 ... Temporary jaw 7 ... 1st stage 8 ... 2nd stage 9 ... Tower crane 10 ... Receiving Beams 11 ... Stands 12 ... Legs 13 ... Struts 14 ... Climbing equipment 15 ... Crane 16 ... Suspension scaffolding 17 ... Under scaffolding frame 18 ... Framework scaffolding 19 ... Second section steel frame 20 ... Girder 21 ... First chain block 22 … Hanging chains 23… forms 24… cast concrete 25… bearings 26… second chain block 27… hanging chains 28… backfilled earth and sand

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Isao Yanagisawa 8-21-1, Ginza, Chuo-ku, Tokyo Inside Takenaka Corporation Tokyo Main Store (72) Inventor Kazuya Okamoto 8-21 Ginza, Chuo-ku, Tokyo No. 1 Inside Takenaka Corporation Tokyo Main Store

Claims (4)

[Claims] An upper first stage and a lower second stage to be used for construction of a skeleton are supported by a erected steel frame or a completed skeleton, and are sequentially stepped up to sequentially move the skeleton upward. And a tower crane required for construction is supported by the first stage and the second stage, and climbing is performed corresponding to step-up of both stages. And stage lift-up construction method. 2. An upper first stage on which a hanging scaffold is suspended is supported by a section of steel that has been erected, and a lower second stage disposed below the first stage is installed under the steel frame. The tower crane required for the construction is supported by the second stage by allowing the tower crane required for the construction to pass through the first stage and to be supported by the second stage by using the hanging scaffold and the tower crane. In addition, the above-mentioned first stage is stepped up several times at a small pitch together with the suspended scaffolds to perform several layers of required concrete work, and then the tower crane is climbed by taking a reaction force to the first stage. The two stages are stepped up at a large pitch and supported by the second stage again, and then the tower crane is used to construct the next section of steel frame. A tower construction crane and a stage lift-up construction method, characterized in that a building body is built up sequentially in turn. 3. The step-up of the first stage,
Performed by the first chain block temporarily installed at the upper end of the steel frame that was erected, the step up of the second stage,
The claim 1 or claim 2, wherein the step is performed by a second chain block temporarily provided on the first stage, and the step-up of the tower crane is performed by equipping the crane with a climbing means movable up and down by a climbing means provided on the crane. Item 4. The method of lifting up a tower construction crane and stage according to Item 2. 4. A semi-finished product precast concrete slab to be assembled to the steel frame on an outer wall surface of a skeleton to be constructed, a required concrete work is performed on an inner wall surface using a formwork assembled on site, and the first stage 4. The method according to claim 1, wherein the second stage is fixed to the skeleton as a permanent member at an upper limit of step-up.