JP2013011119A - Construction method of multi-layer building and lifting device for continuous layer foothold used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce construction costs of a building by attaining compression of temporary construction costs by disassembling a tower crane on early stage and to facilitate work for ganging down a continuous layer foothold after the end of exterior work.SOLUTION: According to a construction method of a building 1 for constructing a skeleton 2 using a tower crane 35, a continuous layer foothold 30 composed of a plurality of foothold units 31 which can be divided in a horizontal direction is assembled along the outer periphery of a lower-layer part of the building 1, and when the continuous layer foothold 30 is moved upward in accordance with the progress of exterior work, the tower crane 35 is used. After the skeleton 2 is constructed, a dividable mobile lifting device 10 is installed on a roof floor 1a of the building 1, and when the foothold units 31 are moved downward after the end of the exterior work in an uppermost layer part of the building 1, the lifting device 10 is used to thereby make earlier the timing to disassemble the tower crane 35.

Description

  The present invention relates to a method for constructing a multi-story building that uses a tower crane to construct a frame and push up a multi-story scaffold, and a lifting device for a multi-story scaffold used therefor.

  When building a building, a scaffold is assembled so as to surround the outer periphery of the building, and the scaffolding and exterior construction of the outer periphery of the building are performed using this scaffold. Scaffolds are generally installed on the ground, foundation structures, or on the lower floors that have already been built and used as a back-up. (For example, Patent Documents 1, 2) Reference) may be used.

  By the way, a tower crane is often used in the construction of a high-rise building, and in the invention of Patent Document 2, a plurality of scaffold units are horizontally arranged so that a multi-layer scaffold can be pushed up (sliding up) by the tower crane. Connected in the direction to form a multi-layered scaffold.

JP-A-9-137603 Japanese Patent Laid-Open No. 11-343729

  However, the multi-story scaffold lifted by the tower crane as described in Patent Document 2 is not necessary after finishing the exterior construction of the top layer of the building. It is necessary to suspend each scaffold unit to the ground with a crane. Therefore, the dismantling time of the tower crane is almost always the dismantling time of the multi-story scaffolding. In addition, the weight of the scaffold unit is usually around 2t, and the need for using a large tower crane is low. In other words, at present, large-scale tower cranes that are expensive and uneconomical for suspending multi-story scaffolds are being continuously installed, which is a factor in raising the cost of temporary construction costs.

  Here, in order to avoid lengthening of construction period and increase in cost due to the use of a tower crane at the time of rearranging (uplifting) the multi-layered scaffold, a multi-layered self-raising type with a winch and a guide member provided integrally Scaffolds and the like have also been proposed (see JP 2003-27740 A). When the multi-layer scaffold is lowered to the ground after the exterior work is completed, the multi-layer scaffold in the upper layer part is added to each tower crane. Use the to go down to the ground. Further, since the guide member is provided on the housing, the multi-layered scaffold can be lifted and supported, so that it can be removed as each scaffold unit is lowered, but it takes time and effort.

  The present invention has been made in view of such a background, and the tower crane is dismantled at an early stage so as to reduce the temporary construction cost, thereby reducing the construction cost of the building, and the multi-layer scaffold after the completion of the exterior work Its main purpose is to facilitate the hanging work.

  In order to solve the above-mentioned problem, the present invention is a construction method of a multi-layer building (1) that constructs a frame (2) using a tower crane (35), and is a plurality of scaffold units that can be divided in the horizontal direction Assembling a multi-layered scaffold (30) comprising (31) along the outer periphery of the low-rise part of the multi-story building; and moving the multi-story scaffold upward by the tower crane in accordance with the progress of exterior construction; , After constructing the frame, dismantling the tower crane and installing a movable lifting device (10) that can be divided on the roof (1a) of the multi-layer building; and the uppermost layer of the multi-layer building And moving the scaffold unit downward by the lifting device after finishing the exterior work at the section.

  According to the present invention, the tower crane is used when moving the multi-layer scaffold upward, but when the scaffold unit is moved downward after finishing the exterior work, the lifting device is used without using the tower crane. Therefore, the tower crane dismantling work can be started without waiting for the completion of the exterior construction and the downward movement of the multi-story scaffolding. Moreover, the work of moving the scaffold unit downward after the exterior work is completed can be easily performed by the lifting device. In addition, since the lifting device is a movable type that can be divided, it is easy to move between the scaffold units, and since the divided members can be transported by a main elevator or the like, installation and removal work is also easy.

  According to another aspect of the present invention, the method further includes a step of disassembling the scaffold unit moved downward by the lifting device after being moved by the mobile crane (38) installed on the ground. be able to.

  In this way, it is not necessary to use the outer periphery of the building as a work area during the dismantling work period of the scaffold unit, so that the state where the building entrance is closed and other work such as interior work cannot be continued. Can be prevented. In addition, since the construction of outer grooves around the building can be started early, the process can be shortened.

  Moreover, according to one aspect of the present invention, the lifting device includes a plurality of brackets (11) that are detachably fixed to the housing, and a main body portion that is detachably connected to a housing inner portion of each bracket ( 17), and in the step of moving the scaffold unit downward, while the main body is connected to one of the plurality of brackets and the scaffold unit is moved downward, the other scaffold unit is moved downward. As a preparation for moving to, at least another one of the plurality of brackets can be fixed to the housing.

  In this way, during the hanging work of the multi-layered scaffold, the work of fixing the bracket to the frame of the multi-layered scaffold to be lowered later can be performed, and the working time can be shortened.

  Moreover, in order to solve the said subject, after finishing exterior construction in the uppermost layer part of a multi-story building (1), this invention is the several scaffold which comprises the continuous-layer scaffold (30) which can be divided | segmented horizontally. A lifting device (10) installed on the roof (1a) of the multi-story building to move the unit (31) downward, further projecting outward from the outer peripheral surface of the housing (2) and the housing A bracket (11) having a pulley (12) in the vicinity of the tip, and a main body (removably connected to the inner part of the bracket). 17), and the main body is moved to the outside by a main body pedestal (18) having a moving wheel (19), a weight (20) divided into a plurality and placed on the main body gantry. To the main frame Vignetting, is configured with a winch (21) for raising and lowering a wire (27) which is suspended from the pulley.

  According to the present invention, the bracket and the main body can be detached and the weight can be divided, so that it can be transported by a built-in elevator installed in a multi-layered building, and is easily lifted on the building roof. Equipment can be installed and removed. Therefore, the dismantling work of the tower crane can be started without waiting for the suspension of the multistory scaffold. In addition, since the main frame is equipped with moving wheels, it is easy to move the main frame even when weights are placed on it. Will also be easier. Furthermore, if you prepare multiple brackets with different shapes in consideration of the shape of the frame and the position of piping equipment etc. set on the roof of the multi-layer building, the installation area of the lifting device will not be limited, It can be applied to various buildings.

  In addition, according to one aspect of the present invention, it is possible to further include fixing means (L-shaped member 13) for detachably fixing the bracket to the housing.

According to this configuration, fixed in advance precursor easy bracket handling, body mount laden c Eito can perform easily positioned by coupling to the bracket. If a plurality of brackets are prepared, the bracket can be fixed to a scaffold unit to be suspended later during the suspension of one scaffold unit, and the working time can be shortened. On the other hand, if the brackets have different shapes, the lifting device can be installed while avoiding interference with the foundations and piping of the equipment installed on the roof of the multi-layer building.

  As described above, according to the present invention, the multi-layer scaffold can be easily suspended after the exterior construction is completed, and the tower crane is disassembled at an early stage to reduce the temporary construction cost, thereby reducing the construction cost of the building. be able to.

Sectional drawing of the principal part of the building under construction by the method according to the present invention The principal part top view of the building under construction by the method concerning the present invention Explanatory drawing which shows the procedure of the construction method of the building which concerns on this invention Explanatory drawing which shows the procedure of the construction method of the building which concerns on this invention Explanatory drawing which shows the procedure of the construction method of the building which concerns on this invention Explanatory drawing which shows the procedure of the construction method of the building which concerns on this invention Explanatory drawing which shows the procedure of the construction method of the building which concerns on this invention Explanatory drawing which shows the procedure of the construction method of the building which concerns on this invention The side view which shows the installation state of the lifting apparatus shown in FIG. The top view which shows the installation state of the lifting apparatus shown in FIG. Side view of a lifting device equipped with a bracket different from that shown in FIG.

  Hereinafter, a construction method of a multi-story building (hereinafter simply referred to as a building 1) according to the present invention and an embodiment of a lifting device 10 used therefor will be described in detail with reference to the drawings.

  First, the multistory scaffold 30 used when building the building 1 is demonstrated with reference to FIG. 1 and FIG. In this embodiment, for example, when a high-rise building having 30 floors or more is constructed, a multi-layer scaffold 30 supported by the frame 2 of the building 1 instead of the ground G is used as an external scaffold surrounding the outer periphery of the building 1. Note that the frame 2 is a part mainly responsible for strength excluding joinery, construction, finishing, and equipment, and refers to pillars, beams, walls (including parapets), floors (including fences), and the like.

  The multi-layer scaffold 30 has a plurality of scaffolds (scaffold plates 30a) arranged in the vertical direction so as to have a height of about three levels of the building 1, and transmits the load to the chassis 2 (reaction force from the chassis 2). It is an external suspension scaffold that is installed in a floating state outside the building. The multi-layered scaffold 30 is formed into an annular shape by connecting a plurality of scaffold units 31 formed in a length of about 4 to 5 m (horizontal length along the frame 2) in the horizontal direction.

  Each scaffold unit 31 has a plurality of locking tools 32 for locking to the housing 2, and is fixed by locking the locking devices 32 to the housing 2, so that a load can be transmitted to the housing 2. it can. The multi-layer scaffold 30 is used while being pushed up according to the progress of the frame construction and the exterior construction. A tower crane 35 is installed at the construction site for building work and the like, and the multi-layer scaffold 30 is sequentially slid upward for each scaffold unit 31 using the tower crane 35. When the multi-layer scaffold 30 is moved upward, the anchor unit 32 is released from being locked by the locking tool 32 in a state where the scaffold unit 31 is suspended by the tower crane 35, and the scaffold unit 31 is moved to one level of the building 1. After lifting upwards, the locking tool 32 is locked and fixed to the housing 2 again. Then, the above-described procedure is repeated for all the scaffold units 31 to connect the scaffold units 31 to each other, whereby the integral multi-layer scaffold 30 surrounding the outer periphery of the building 1 is completed.

  Next, an outline of the construction procedure of the building 1 will be described with reference to FIGS. First, as shown in FIG. 3, after building the foundation 3 including the pile 4, the footing 5, the foundation beam 6, and the like, the tower crane 35 is installed. The tower crane 35 may be an internal building installed through the slab in the building 1 or an external building installed outside the building 1. In addition, the tower crane 35 may be configured such that the crane main body 36 rises along the crane mast 37 (post) in accordance with the progress of the frame construction. May be raised.

  Next, as shown in FIG. 4, the multi-layer scaffold 30 is assembled so as to surround the outer periphery of the building 1. At this stage, since the frame 2 is not constructed, the multi-layer scaffold 30 is supported by the ground G, not the frame 2, and is in a self-supporting state. The assembly of the multi-layer scaffold 30 may be performed using the tower crane 35 installed previously, or may be performed without using the tower crane 35.

  When the frame 2 is constructed in order from the lower floor, the multi-layer scaffold 30 is pushed up one by one by the tower crane 35 as shown in FIG. At this time, as described above, the multi-layer scaffold 30 is unlocked to the housing 2 by the locking device 32 for each scaffold unit 31, lifted (lifted by the tower crane 35), and locked to the housing 2 by the locking device 32. Is done. In the multi-layer scaffold 30, the frame work is performed in the upper layer part, and the exterior work is performed in the lower layer part. By repeating this procedure, the multi-layer scaffold 30 moves to the uppermost layer of the building 1 as shown in FIG.

  In the state shown in FIG. 6, the building work has been completed, and equipment and piping materials to be installed on the rooftop 1a of the building 1 are also sequentially carried into the rooftop 1a. The lifting work by the crane 35 is completed. Thereafter, the dismantling work of the tower crane 35 is started.

  On the other hand, as shown in FIG. 7, the lifting device 10 according to the present invention is installed on the roof 1 a of the building 1 in accordance with the end of the exterior work using the multi-layer scaffold 30. Note that the lifting device may be carried into the roof 1a using the tower crane 35 when the tower crane 35 remains, and provided as a permanent installation in the building 1 as in the unloading operation described later. You may carry out using the produced elevator. After completion of the exterior construction, the multi-layer scaffold 30 is moved downward using the lifting device 10 and disassembled.

  Specifically, the lifting apparatus 10 is positioned in front of the scaffold unit 31 to be lowered, and a single pipe or the like is installed in the scaffold unit 31 as a guide means for lowering as necessary. Next, in a state where the scaffold unit 31 is suspended by the lifting device 10, the locking tool 32 for the housing 2 is released, and an operator is arranged at a predetermined level as the scaffold unit 31 descends, and interferes with the building 1. The operator suspends the scaffold unit 31 and hangs it on the lower floor. At this time, if the guide pipe or the like is installed in a mode of projecting downward from the scaffold unit 31, it is removed before the guide pipe hits the ground G.

  Then, as shown in FIG. 8, the scaffold unit 31 is suspended on the mobile crane 38 arranged on the ground (on the ground G) and moved to the dismantling yard, and the scaffold unit 31 is dismantled in the dismantling yard. .

  After the suspension of one scaffold unit 31 is completed, the lifting device 10 is moved on the rooftop 1a, and this operation is repeated for each scaffold unit 31, so that the multiple layers installed in the uppermost layer of the building 1 The scaffold 30 can be lowered without using the tower crane 35. When the scaffold unit 31 is moved downward, a plurality of brackets 11 of the lifting device 10 that are detachably fixed to the housing 2 are prepared, and one of them is the main body portion 17 of the lifting device 10. The other bracket 11 may be fixed to the housing 2 as a preparation for moving the other scaffold unit 31 downward while the scaffold unit 31 is moved downward by connecting the two.

  Here, since the main body 17 of the lifting apparatus 10 is a mobile type equipped with wheels 19 as will be described later, the movement of the main body 17 between the scaffold units 31 on the roof 1a of the building 1 uses a crane or the like. This can be done easily with human power. Further, since the lifting device 10 can be divided (disassembled) as will be described later, the suspended lifting device 10 is lowered to the ground floor by a main elevator after the suspended work of the multi-layer scaffold 30 is suspended. Can be taken out of the building 1.

  As described above, the tower crane 35 is used when the multi-layer scaffold 30 is moved upward. However, when the scaffold unit 31 is moved downward after finishing the exterior work, the lifting device is used without using the tower crane 35. 10 can be used, the dismantling work of the tower crane 35 can be started without waiting for the completion of the exterior work and the downward movement of the multi-layer scaffold 30. Also, the lifting device 10 can easily perform the work of moving the scaffold unit 31 downward after the exterior construction is completed.

  In addition, the scaffold unit 31 moved downward by the lifting device 10 is lifted by the mobile crane 38 installed on the ground, moved to the dismantling yard, and then dismantled, so that the dismantling work period of the multistory scaffold 30 is achieved. Since it is not necessary to use the outer periphery of the building 1 as a work area, it is possible to prevent the entrance of the building 1 from being closed and preventing other work such as interior work from continuing. Moreover, since the outer groove construction around the building 1 can be started at an early stage, the process can be shortened.

  Furthermore, by preparing a plurality of brackets 11 of the lifting device 10, it is possible to fix the bracket 11 to the housing 2 with respect to the scaffold unit 31 to be lowered later while the one scaffold unit 31 is suspended. The working time can be shortened.

  Next, the lifting device 10 will be described in detail with reference to FIGS. 9 and 10. The lifting device 10 includes a bracket 11 having a pulley 12 in the vicinity of the distal end thereof, and a main body 17 that is detachably coupled to the proximal end side of the bracket 11 and is installed on a slab S on the roof floor of the building 1. Is done. The main body 17 includes a movable main body base 18 having wheels 19, a weight 20 placed on the main body base 18, and an electric endless winch 21 attached to the main body base 18.

  A beam 7 projects upward along the periphery of the building 1 on the upper surface of the slab S on the roof floor of the building 1, and the lifting device 10 is fixed to the beam 7. The beam 7 is formed with an inner protrusion 7 a that protrudes toward the inside of the building 1 at the upper end of the inner surface thereof.

  The bracket 11 has a frame shape in which an upper chord member 11a and a lower chord member 11b each made of a steel material are connected by a connecting member 11c. A pulley 12 is attached to the tip of the upper chord member 11a. The lower chord member 11b is provided with a rectangular protruding portion 11d protruding downward at the distal end portion, and an L-shaped member 13 protruding downward is provided slidably on the proximal end side. The L-shaped member 13 is provided with a fixing bolt 14 at the slide cylinder portion, and screw-type jacks 15 and 16 at positions facing the inner and lower surfaces of the inner projection 7a of the beam 7, respectively.

  The bracket 11 is configured such that the L-shaped member 13 is slid to the distal end side with the projecting portion 11d projecting further outward from the outer peripheral surface 2o of the housing 2 and the lower chord member 11b abutting on the upper surface of the beam 7. 14, the outer surface and the inner surface of the beam 7 are sandwiched between the projecting portion 11d and the L-shaped member 13, so that the beam 7 can be detachably fixed. In addition, after fixing the L-shaped member 13, the bracket 11 can be more securely fixed to the beam 7 by stretching both screw type jacks 15 and 16. In this embodiment, the bracket 11 is fixed to the beam 7. However, the bracket 11 may be fixed to a housing 2 such as a parapet, a handrail wall, or a heel.

  The main body pedestal 18 has a rectangular parallelepiped frame shape, and has a wire winder 22 on the inner front end side and a weight placing portion 23 on the inner rear end side. The wire winder 22 can wind a wire 27 having the same length as the height of the building 1. A weight 20 having a predetermined weight divided into a plurality of parts is placed on the weight placement unit 23.

  The electric endless winch 21 is installed on the upper surface of the main body gantry 18 and is fixed to the main body gantry 18 by bolts and nuts 26, and the rear end portion thereof is connected to the upper rear end of the main body gantry 18 by a retaining wire 41.

  The main frame 18 has four wheels 19 on the front, rear, left, and right, and can move on the roof 1a of the building 1 with the wire winder 22, the weight 20, and the electric endless winch 21 placed thereon. 2 is connected to the base end of the bracket 11 fixed to 2 by bolts and nuts 25. Further, four adjuster bolts 24 are provided in the vicinity of the wheel 19 of the main body gantry 18, and the adjuster bolt 24 is rotated and protruded downward, so that the wheel 19 is lifted and the main body gantry 18 is stably rooftop. It can be installed on the slab S of the floor. The installation of the adjuster bolt 24 also has the significance of increasing the frictional resistance (slip resistance against horizontal force) against the roof surface of the main body base 18 on which the weight 20 is placed. In order to prevent the lifting device 10 from falling, the rear end portion of the main body gantry 18 may be connected to a part of the housing 2 by a retaining wire 42.

  The wire 27 wound around the wire winder 22 passes through the electric endless winch 21 and then hangs down through the pulley 12, suspends the cargo handling hung on the ring 28 connected to the tip, and the electric endless winch 21 As a result, the hoisting / feeding is performed, and the cargo handling (scaffolding unit 31) is raised and lowered. A swivel 29 is interposed between the wire 27 and the ring 28 at the tip thereof so that the ring 28 (scaffolding unit 31) does not rotate due to fluctuations in the load applied to the wire 27.

  Thus, since the bracket 11 and the main body part 17 can be attached and detached, and the weight 20 can also be divided, it can be transported by a main elevator installed in the building 1, and can easily be used on the roof 1 a of the building 1. The lifting device 10 can be installed and removed. Therefore, the dismantling work of the tower crane 35 can be started without waiting for the suspension of the multistory scaffold 30. Further, since the main body gantry 18 includes the wheels 19 for movement, the main body gantry 18 can be easily moved even when the weight 20 is placed, and the plurality of scaffold units 31 are lifted on the roof 1a of the building 1 to be suspended. The work of replacing the heavy equipment 10 is also easy. Furthermore, as shown in FIG. 11, if a plurality of brackets 11 having different shapes are prepared in consideration of the shape of the housing 2 and the position of the piping equipment 8 set on the roof 1 a of the building 1, The installable area is not limited, and application to the entire circumference of the building 1 and diversion to various buildings are possible.

  Further, by further including an L-shaped member 13 that detachably fixes the bracket 11 to the housing 2, the easy-to-handle bracket 11 is fixed to the housing 2 in advance, and the body portion 17 loaded with the weight 20 is attached to the bracket 11. By connecting, positioning can be performed easily. If a plurality of brackets 11 are prepared, the bracket 11 can be fixed to the scaffold unit 31 to be lowered later during the suspension work of one scaffold unit 31, and the working time can be shortened. On the other hand, if the shape of the bracket 11 is different, the lifting device 10 can be installed while avoiding interference with the foundations of equipment and piping equipment 8 installed on the roof 1a of the building 1.

  The description of the specific embodiments is finished as described above, but the present invention is not limited to these embodiments, and can be changed as appropriate without departing from the spirit of the present invention. For example, in the above embodiment, only one lifting device 10 is prepared and the scaffold unit 31 is suspended. However, two lifting devices 10 are prepared, and the two lifting devices 10 are used to mount the scaffold unit 31. You may hang it together. In such a case, or when the scaffold unit 31 is relatively light, the plurality of scaffold units 31 may be suspended in a connected state. Moreover, not all the components of the construction method of the building 1 and the lifting device 10 according to the present invention shown in the above embodiment are necessarily essential, and at least as long as they do not depart from the spirit of the present invention. Is possible.

1 building (multi-story building)
1a Roof 2 Frame 7 Beam (frame)
10 Lifting device 11 Bracket 12 Pulley 13 L-shaped member (fixing means)
DESCRIPTION OF SYMBOLS 17 Main-body part 18 Main body mount 19 Wheel 20 Weight 21 Electric endless winch 27 Wire 30 Multi-layered scaffold 31 Scaffolding unit 35 Tower crane 38 Mobile crane

Claims (5)

A method for constructing a multi-layered building in which a tower is constructed using a tower crane,
Assembling a multi-layered scaffold composed of a plurality of scaffold units that can be divided in the horizontal direction along the outer periphery of the lower layer portion of the multi-layer building;
Moving the multi-layer scaffold upward with the tower crane according to the progress of exterior construction;
After constructing the housing, dismantling the tower crane and installing a movable lifting device that can be divided on the roof of the multi-layer building;
And a step of moving the scaffold unit downward by the lifting device after finishing the exterior construction at the uppermost layer of the multi-layer building.   The construction of a multi-story building according to claim 1, further comprising a step of dismantling the scaffold unit moved downward by the lifting device after being moved by a mobile crane installed on the ground. Method. The lifting device comprises a plurality of brackets that are detachably fixed to the housing, and a main body that is detachably coupled to the housing inner portion of each bracket.
In the step of moving the scaffold unit downward, as the preparation for moving the other scaffold unit downward while connecting the main body part to one of the plurality of brackets and moving the scaffold unit downward, The method for constructing a multi-story building according to claim 1 or 2, wherein at least another one of the plurality of brackets is fixed to the housing. After finishing the exterior construction at the uppermost layer of the multi-layer building, the lifting installed on the roof of the multi-layer building to move the plurality of scaffold units constituting the multi-layer scaffold that can be divided in the horizontal direction downward A device,
A bracket that protrudes further outward from the outer peripheral surface of the housing and is attached to the housing in such a manner that at least a part thereof is in contact with the upper surface and the inner surface of the housing, and has a pulley near the tip;
A main body part detachably connected to a housing inner part of the bracket,
The main body is attached to the main body frame so as not to move outwardly and suspended from the pulley, and a main body frame having moving wheels, a weight divided into a plurality of weights and placed on the main body frame. A lifting device comprising a winch for raising and lowering a wire.   The lifting device according to claim 4, further comprising fixing means for detachably fixing the bracket to the housing.

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