KR100788000B1 - A construction method and structure for tower crane cross beam - Google Patents

Abstract

A construction method and structure for a tower crane cross beam are provided to remarkably increase a resistance strength and a support effect against a horizontal force (horizontal load) of a cross beam. A construction structure for a tower crane cross beam includes a burying unit, a bracket, a cross beam, and a turn buckle(25). The burying unit has projection rods projecting from both surfaces of a flat body. The bracket is fastened to the projection rod formed at one side of the burying unit, and has a support plate(15b) projecting outward from a lower end of the body. The cross beam includes a horizontal bean(17), and vertical beams(18B). The horizontal bean is mounted on the bracket. The vertical beams are connected to the bracket installed at a core wall. The turn buckle connects fixed pins(24) mounted on the side surface of the cross beam and the core wall to distribute a horizontal load of the tower crane to the core wall.

Description

A construction method and structure for tower crane cross beam

1a to 8b is a detailed view for explaining the step structure and the construction method of the tower crane installation according to the invention step by step,

1A and 1B are schematic perspective and cross-sectional views illustrating a state in which a buried unit is mounted in a core wall;

Figure 2a to 2c is a perspective view and a cross-sectional view showing a state in which the bracket is fastened to the buried unit,

3A and 3B are perspective views showing a state in which a cross beam consisting of a single horizontal beam and a pair of vertical beams is installed;

4A to 4C are perspective views illustrating main parts in which a fastening plate is mounted at a predetermined position of the crossbeam;

5A and 5B are perspective views showing a state where a fixing piece is installed on a crossbeam and a core wall;

6 is a perspective view illustrating main parts of a connecting bar mounted between a pair of longitudinal beams constituting a crossbeam;

7A and 7B are a perspective view and a plan view showing a state in which a turnbuckle is bound to each fixing piece;

8A and 8B are a perspective view and a plan view showing a state where a steel frame beam for tower crane is mounted on a cross beam.

<Description of the symbols for the main parts of the drawings>

10: core wall 11A, 11B: formwork

12: embedded unit 12a: flat plate

13a, 13b: protrusion bar 13c: flange

14: auxiliary unit 15: bracket

15a: body 15b: base plate

15c: Bolting hole 16: auxiliary plate

17: horizontal beam 18A, 18B: vertical beam

19: crossbeam 20: finishing bracket

21: Fastening bolt 22a, 22b: Fastening plate

23a, 23b: connecting bar 24: fixing piece

25: Turnbuckle 50: Steel Beam

The present invention increases the strength and supporting effect against the vertical force and the lateral load generated by the tower crane in installing a cross beam for mounting a steel beam for a normal tower crane on a core wall forming an elevator passage when constructing a high-rise building. The present invention relates to a beam structure for installing a tower crane and a method of constructing the same, which can easily perform repetitive installation and dismantling operations according to each interlayer construction process.

In general, a tower crane is a construction machine that can perform hoisting and swinging motions when constructing a building or a structure, and it is possible to lift various heavy materials high and its working radius is wide, so that the high-rise building construction of a large city It is widely used in, and recently used for various purposes such as plant, steel tower construction or port unloading.

In general, when building a high-rise building, various kinds of luggage are moved to the work space by using the tower crane installed on the site.In this case, it is necessary to consider external conditions such as load or wind pressure depending on the surrounding environment, However, consideration should be given to securing the dead zone of the lifter and the driver, minimizing mutual interference, the maximum lift radius according to the member weight, and the position to minimize the jib interference of the tower crane and counter.

As the construction method of the tower crane, the mast is fixed to the floor and extends sequentially to raise the tower crane body and the climbing type in which the mast and the tower crane body are lifted up according to the rising construction of the frame. (Climbing Type) is an example.

The freestanding type is a method of installing a tower crane after fixing an anchor fixed to the ground with a concrete block, and is mainly used when steel cannot support the tower crane during construction of apartments and steel structures. This method is inevitably required to form mast fixtures on the outer wall or slab of the building as the structure of the building is extended and used to extend the mast, which is a vertical member of the tower crane. It is mainly used for low-rise building or apartment construction work because cost is generated and interference occurs in exterior wall finishing work.

On the other hand, the climbing type supports tower crane inside the core when there is no space to install tower crane outside the steel frame or building construction, or to remove extra mast loss cost and low-rise tower crane interference in high-rise buildings and to perform high-rise construction smoothly. It is a way to raise. In other words, this method is widely used to build high-rise buildings by minimizing the interference between the air due to the effective operation of heavy lifting equipment and securing economic efficiency and safety.

However, when constructing the tower crane in this climbing type, in order to support the load of the tower crane in a balanced manner, the steel beam for the tower crane is correctly positioned in a state where the vertical and horizontal angles of the fixing anchor are set correctly. Although it is difficult to find the exact mounting position of the tower crane during the construction of the fixing anchor, it is practically dependent on the manual operation by the operator when constructing the fixing anchor or the steel beam.

In addition, when an error occurs in the anchor position due to the vibration generated when the concrete is poured into the formwork, it has to be reconstructed, so that the efficiency of the workers is reduced and the construction cost and material cost are high.

In consideration of such problems of the prior art, the construction method disclosed in Korean Patent No. 444831 discloses a base member in which a connection position with a tower crane is preset in a form for forming a core wall in a high-rise building. After mounting the anchor member on the base member, and embedded in concrete, and configured to bind the steel beam of the tower crane to the anchor body.

However, in the case of this construction method, the load is transmitted to the site where the anchor body on the core wall and the steel beam of the tower crane are fastened as it is, and the shear stress acts intensively. Since the center of the steel beam is maintained in the space and the operator must be fastened by bolting to the anchor body has a problem that the work itself is very difficult.

In addition, if a construction error occurs in the gap between the core wall is not provided at all, there is an unreasonable point to re-produce the steel beam itself, there is usually a surface of the base member is exposed on the core wall as it is The problem was that the appearance of the finish was greatly damaged.

The present invention has been made in consideration of the above points, and an object of the present invention is the tower crane as well as the shear strength of the vertical force according to the total load of the tower crane is installed on the core wall to build each inter-layer structure of high-rise building The present invention provides a beam structure for installing a tower crane and a construction method thereof that can greatly increase the resistance strength and supporting effect against the horizontal force (lateral load) of the cross steel beam maintaining the molten steel beam.

In addition, the present invention can easily perform the repeated installation and dismantling work of the cross beam according to each interlayer construction process and at the same time for the tower crane installation that can be finished so that the landfill unit is not exposed from the core wall even after the cross beam is dismantled It is to provide a beam structure and its construction method.

The present invention for achieving the above object, as a structure for mounting a steel beam on the core wall on the passage to be installed the tower crane according to the construction stage of the high-rise building, protruding rods are formed on each side of the flat plate and the core A buried unit which is installed to face each other via an auxiliary plate when the wall is constructed, a bracket having a support plate which is fastened to a lower end of the body while being fastened by a protruding rod formed on one side of the buried unit, and mounted on the bracket Cross beam consisting of a horizontal beam fixedly installed, including a closing bracket, and a vertical beam connected to the bracket installed on the other core wall from the horizontal beam, and fixing pieces mounted on the side portions of the cross beam and the core wall. It consists of turnbuckles for dispersing the lateral loads of the tower crane to the core wall by connecting them together. It is characterized by.

In addition, at least one connecting bar is mounted between the pair of longitudinal beams.

In addition, the present invention is a method for mounting a steel beam on the core wall on the passage to be installed tower crane according to the construction stage of a high-rise building, the buried bar is formed integrally with each other protruding rods on both sides based on the flat plate Mounting the unit as a fastening bolt at a predetermined position on the inner surface of the formwork, placing concrete into the form to cure the core wall, and then dismantling the formwork so that the flat body of the landfill unit is exposed from the core wall on the passage; And mounting the brackets on the buried unit by fixing the bolts through the brackets to the protrusions of the flat plate, and fastening a single horizontal beam on the one side bracket and then using a pair of the horizontal beams. Fastening and fixing the vertical beam on a bracket installed on the other core wall, the horizontal beam and three It characterized by further comprising: a beam installing the turnbuckle in the mounted state between the core wall, including those beams, comprising the steps of fixing to the mounting steel beam for the hypothesis of the tower crane on the vertical beam.

Here, in the process of mounting the buried unit to the formwork may further include a step of closely fixing the gap between the plate and the formwork so as not to form a gap.

In addition, the horizontal beam is first fastened in a state seated on the bracket is characterized in that the second mounting by mounting the closing bracket on the upper end of the horizontal beam.

The method may further include mounting one or more connecting bars between the pair of longitudinal beams, and further including post-processing the buried unit so as not to be exposed from the core wall in a state in which the horizontal beams and the longitudinal beams are disassembled.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1A to 8B are diagrams for explaining a tower crane installation beam structure and a construction method thereof according to the present invention, the tower crane is installed on the core wall 10 on the elevator passage in the step of building a conventional high-rise building (shown It is possible to assemble the steel beam 50 of the most easily and safely, as well as to be configured to repeatedly use the various components according to each inter-layer construction.

First, the embedding unit 12 is mounted in a state in which one side is exposed in the core wall 10 cured in the dies 11A and 11B, and the embedding unit 12 is centered on the flat body 12a. Protruding rods 13a and 13b are formed on both sides thereof, and a flange 13c is formed at the end of the buried side protruding rod 13a. Unit 14 may be mounted at the same time.

The buried unit 12 exposed to the core wall 10 is equipped with a bracket 15 having a support plate 15b protruding outward from the lower end of the body 15a, and these brackets 15 are elevator doors (not shown). 3 is installed on the open core wall 10, and two are installed on the inner core wall 10, and are configured in different shapes, but the detailed description thereof will be omitted.

In addition, in the state of removing the auxiliary plate 16 disposed between the buried unit 12 and the bracket 15 can be fastened directly, of course, the bolt fastening hole formed in the bracket (15) 15c) is preferably configured to be processed in the form of a long hole to absorb construction errors.

On the other hand, a cross beam 19 consisting of a single horizontal beam 17 and a pair of vertical beams 18A, 18B is mounted on the bracket 15, and a plurality of fastening bolts are mounted in a state where the closing bracket 20 is seated. It is maintained by the (21) to be fixed to each other.

In the case of the cross beam 19, a pair of longitudinal beams 18A, 18B is applied to the other core wall 10 from the horizontal beam 17 in a state where the horizontal beam 17 is first bound to the bracket 15. It can be connected to the installed bracket 15, it is possible to be assembled to each other via the plate-shaped fastening plates (22a, 22b) on the upper and side connection portions of these beams (17, 18A, 18B).

In addition, by mounting one or more connecting bars 23a and 23b between the pair of longitudinal beams 18A and 18B constituting the crossbeam 19, both vertical beams 18A and 18B are balanced and at the same time, the torsional force is increased. It is possible to block the operation, by binding the turnbuckle 25 to the side portion of the crossbeam 19 including the auxiliary unit 14 mounted to the core wall 10 via the fixing piece 24. It is comprised so that the lateral load of tower crane may be disperse | distributed to the core wall 10. As shown in FIG.

Next, the construction process of the tower crane installation beam structure according to the present invention will be described in detail.

First, as shown in FIGS. 1A and 1B, the reinforcing rods are formed in the buried unit 12 in which the protruding rods 13a and 13b having different lengths are integrally formed on both sides of the flat body 12a. After the mounting bolts 21 are mounted at the set positions of the side molds 11A, respectively, the concrete is cast into both molds 11A and 11B to cure the core wall 10.

Subsequently, by disassembling the molds 11A and 11B, one of the flat bodies 12a of the buried unit 12 is exposed from the core wall 10 on the passage.

In addition, the auxiliary unit 14, which is about half the size of the landfill unit 12, is separately fixed to the required portion of the core wall 10 in the same manner, and the landfill unit 12 is mounted on the formwork 11A. By interposing an auxiliary plate 16 made of plywood or styropole between the flat plate 12a and the formwork 11A in order to prevent a gap between the landfill unit 12 and the formwork 11A during concrete placement. Can be fixed tightly.

Next, as shown in FIG. 2A, the fastening bolt 21 is inserted into the protruding rod 13a in a state where the bracket 15 is interposed between the flat body 12a of the buried unit 12 exposed to the core wall 10. By mounting the brackets 15 to each embedded unit 12 is mounted.

At this time, as shown in FIG. 2B, the bracket 15 may be directly mounted between the flat plate 12a and the bracket 15 through the auxiliary plate 16 or with the auxiliary plate 16 removed as shown in FIG. 2C. It may be.

3A and 3B, a single horizontal beam 17 constituting the cross beam 19 is fastened on the one side bracket 15, and then a pair of vertical beams are formed from the horizontal beam 17. 18A and 18B are fastened to the bracket 15 installed on the other core wall 10 to fix the horizontal beam 17 and the vertical beams 18A and 18B on the bracket 15. It is preferable to mount the closing bracket 20 on these upper ends and then fasten it for convenience, but both beams 17, 18A, and 18B may be seated on the bracket 15 in an assembled state.

In addition, as shown in FIGS. 4A to 4C, the fastening plates 22a and 22b in the form of flat plates are firmly fixed to the connection portions of the upper end and side surfaces of the horizontal beam 17 and the vertical beams 18a and 18b. You can do it.

5A and 5B, the side portions of both beams 17, 18A, and 18B including the auxiliary unit 14, which are pre-attached to the core wall 10 in the state where the crossbeam 19 is mounted, as shown in FIGS. The fixing piece 24 is attached.

Thereafter, as shown in FIG. 6, two connecting bars 23a and 23b are provided between the pair of longitudinal beams 18A and 18B, and the horizontal beam 17 as shown in FIGS. 7A and 7B. And a plurality of fixing pieces 24 provided on the core wall 10 including the longitudinal beams 18A and 18B to maintain the mutual balance by installing the turnbuckles 25.

Subsequently, the cross beam 19 can be firmly installed on the core wall 10 through the above-described process as shown in FIGS. 8A and 8B, and the vertical beams 18A, constituting the cross beam 19 are formed. Since the steel frame beam (50) of the rectangular shape on the 18B) can be installed to the tower crane it is possible to perform various operations.

In addition, after dismantling each component in the state of complete construction as described above, the landfill unit 12 exposed to the core wall 10 is treated with cement or the like to finish the appearance of the core wall 10. It is possible to maintain more beautifully, and in the same manner as described above, it is possible to continuously perform the step of constructing the next layer.

The above-described embodiments are described with reference to the most preferred examples of the present invention, and the present invention is not limited thereto, and further modifications may be made without departing from the technical spirit of the present invention.

As described above, according to the tower crane installation beam structure and the construction method according to the present invention, the buried unit and the bracket having protruding rods on both sides of the flat plate on the core wall for constructing each interlayer structure of the high-rise building As the intersecting cross beam is installed, the shear strength with respect to the vertical force according to the total load of the tower crane can be greatly increased.

In addition, since one or more connecting bars and turnbuckles are installed in the cross beam for maintaining the steel beam on which the tower crane is mounted, the lateral load caused by the tower crane can be distributed to the core wall, thereby greatly increasing the resistance strength. .

In addition, the present invention can easily perform the repeated installation and dismantling operation of the cross beam according to each inter-layer construction process, as well as to cleanly finish the buried unit is not exposed from the core wall after removing the cross beam. .

Claims (7)

According to the construction stage of high-rise building, it is a structure for mounting the steel beam on the core wall on the passage where the tower crane should be installed. Buried units 12 each having protruding rods 13a and 13b formed on both sides of the flat body 12a and installed to face each other via an auxiliary plate 16 at the time of construction of the core wall 10; A bracket 15 having a support plate 15b protruding outward from the lower end of the body 15a while being fastened by a protruding rod 13b formed at one side of the buried unit 12; In the state mounted on the bracket 15 is connected to the horizontal beam 17 that is fixedly installed, including the closing bracket 20 and the bracket 15 installed on the other core wall 10 from the horizontal beam 17 A cross beam 19 consisting of vertical beams 18A, 18B, It is composed of a turnbuckle 25 for connecting the side pieces of the crossbeam 19 and the fixing pieces 24 mounted on the core wall 10 to each other to distribute the lateral load of the tower crane to the core wall 10. Tower crane mounting beam structure characterized in that. The beam structure according to claim 1, wherein at least one connecting bar (23a, 23b) is mounted between the pair of longitudinal beams (18A, 18B). As a method for mounting a steel beam on the core wall on the passage where the tower crane is to be installed according to the construction stage of a high-rise building, Mounting unit 12 having integrally formed protruding rods 13a and 13b on both sides of the flat body 12a integrally as a fastening bolt 21 at a predetermined position on the inner surface of formwork 11A and 11B. To do that, Placing concrete into the molds 11A and 11B to cure the core wall 10 and then disassembling the molds 11A and 11B causes the flat body 12a of the buried unit 12 to have the core wall 10 on the passage. To expose from) Mounting the brackets 15 on the buried unit 12 by fixing the fixing bolts 21 to the protruding rods 13a and 13b of the flat plate 12a via the fastening bolts 21; After fastening a single horizontal beam 17 on the one side bracket 15, a pair of vertical beams 18A, 18B are mounted on the bracket 15 provided on the other core wall 10 from the horizontal beam 17. Fastening and fixing, Installing a turnbuckle 25 between the horizontal beam 17 and the vertical beams 18A, 18B with the core wall 10 including these beams; Method of constructing a beam structure for a tower crane installation, characterized in that it comprises the step of mounting and fixing the steel beam (50) for the construction of the tower crane on the vertical beams (18A, 18B). The method of claim 3, wherein the step of fixing the buried unit 12 to the formwork (11A) in close contact with the plate 12a and the formwork (11A) so as not to form a gap between the plate 12a and the formwork (11A). Construction method of the beam structure body for installing the tower crane further comprising. According to claim 3 or 4, wherein the horizontal beam 17 is first fastened in a state seated on the bracket 15, and then mounted to the upper end of the horizontal beam 17, the mounting bracket 20 to the secondary Construction method of the beam structure for tower crane installation, characterized in that for fastening. The method according to claim 5, further comprising mounting at least one connecting bar (23a, 23b) between the pair of longitudinal beams (18A, 18B). The method of claim 6, further comprising post-processing the buried unit 12 so that the buried unit 12 is not exposed from the core wall 10 while the horizontal beams 17 and the vertical beams 18A and 18B are disassembled. Construction method of the beam structure for tower crane installation.

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