Method for lifting steel plate-concrete module using weight

Abstract

The present invention relates to a method for lifting a steel plate-concrete module using a weight, the method comprising: a step for horizontally arranging a guide frame positioned on an upper portion of the steel plate-concrete module, connected to the steel plate-concrete module by a plurality of first cables, and connected to a crane by a second cable, wherein the guide frame includes the weight; a step for measuring the tension of each of the plurality of first cables by pre-lifting the guide frame; a step for identifying the center of gravity of the steel plate-concrete module on the basis of the measured tensions; and a step for adjusting the position of the weight in the guide frame according to the identified center of gravity and lifting the steel plate-concrete module.

Description

Lifting method of steel plate-concrete modules using weights

[0001] The present invention relates to a lifting method for safely lifting a heavy steel plate-concrete module using a weight.

[0002] Steel Plate Concrete (SC) structures are a structural method that simply replaces the complex rebar and formwork of conventional reinforced concrete structures with steel plates; it involves manufacturing SC modules in advance at a factory and assembling and constructing them on-site.

[0003] To transport and install large SC structural modules assembled at the on-site factory, it is necessary to lift and move the heavy SC modules using a large crane.

[0004] However, since SC structural modules are hollow before concrete pouring, deformation may occur due to unbalanced loads during lifting and transportation; therefore, a lifting method is required to prevent this.

[0005] Therefore, the objective of the present invention is to provide a lifting method for safely lifting a heavy steel plate-concrete module using a weight.

[0006] The objective of the present invention is achieved by a method for lifting a steel plate-concrete module using a counterweight, comprising the steps of: positioning a guide frame horizontally, which is located above the steel plate-concrete module, connected to the steel plate-concrete module by a plurality of first cables, and connected to a crane via a second cable, wherein the guide frame includes a counterweight; pre-lifting the guide frame to measure the tension of each of the plurality of first cables; determining the center of gravity of the steel plate-concrete module based on the measured tension; and adjusting the position of the counterweight within the guide frame according to the determined center of gravity and performing the final lifting.

[0007] The guide frame further comprises a frame body; and a rail coupled to the upper part of the frame body, and the weight may be coupled to the rail so as to be movable along the rail.

[0008] The above steel plate-concrete module comprises: a first steel plate and a second steel plate facing each other with a receiving space in between; a steam outlet formed in the first steel plate and the second steel plate; and a first lifting lug connected to the first steel plate and the second steel plate using a connecting bolt through the steam outlet, wherein a plurality of first cables may be connected to the first lifting lug.

[0009] The first lifting lugs are provided in plurality, and each first lifting lug comprises: a first part connected to the first steel plate and extending in a vertical direction; a second part facing the first part, connected to the second steel plate and extending in a vertical direction; a third part located outside the receiving space, connected to the first part and the second part and arranged in a horizontal direction; and a first connecting ring connected to the third part, and the plurality of first cables may be connected to each of the first connecting rings.

[0010] The above steel plate-concrete module comprises: a first steel plate and a second steel plate facing each other with a receiving space in between; a tie bar connecting the first steel plate and the second steel plate, at least a portion of which is positioned horizontally within the receiving space; and a plurality of second lifting lugs connected to the tie bar, wherein a plurality of first cables may be connected to each of the second lifting lugs.

[0011] The above tie bar includes a first protrusion protruding to the outside of the first steel plate; and a second protrusion protruding to the outside of the second steel plate, and the second lifting lug may be connected to the first protrusion and the second protrusion and coupled to the first steel plate and the second steel plate.

[0012] The second lifting lug comprises a plate-shaped lug body extending in a horizontal direction; and a second connecting ring coupled to the lug body, wherein the plurality of first cables may be connected to each of the second connecting rings.

[0013] Depending on the shape and size of the above steel plate-concrete module, a plurality of the above guide frames can be combined and used.

[0014] A contact detection sensor and a fluid injection device are installed on the side of the above steel plate-concrete module, and in the above-mentioned portion, if a collision risk is detected through the contact detection sensor, fluid can be injected through the fluid injection device to adjust the position of the above steel plate-concrete module.

[0015] The contact detection sensor and the fluid injection device may be coupled to the steam outlet.

[0016] According to the present invention, a lifting method is provided for safely lifting a heavy steel plate-concrete module using a weight.

[0017] FIG. 1 is a flowchart of a lifting method for a steel plate-concrete module according to a first embodiment of the present invention, and

[0018] FIG. 2 is a perspective view showing the positional relationship between a steel plate-concrete module, a guide frame, and a cable in a first embodiment of the present invention, and

[0019] FIGS. 3 and 4 illustrate the change in the position of a weight within a guide frame in the first embodiment of the present invention, and

[0020] FIGS. 5 to 7 show a first lifting rug in a first embodiment of the present invention, and

[0021] FIGS. 8 and 9 illustrate the change in the position of a weight within a guide frame in a second embodiment of the present invention, and

[0022] FIGS. 10 and 11 show a second lifting rug in a second embodiment of the present invention, and

[0023] FIGS. 12a, FIGS. 12b, and FIGS. 12c illustrate the combined use of guide frames in the present invention.

[0024] Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0025] To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0026] In addition, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, so the present invention is not necessarily limited to what is illustrated.

[0027] A lifting method according to the first embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

[0028] FIG. 1 is a flowchart of a lifting method for a steel plate-concrete module according to a first embodiment of the present invention, FIG. 2 is a perspective view showing the positional relationship between the steel plate-concrete module, the guide frame, and the cable in the first embodiment of the present invention, FIG. 3 and FIG. 4 show the change in position of a weight within the guide frame in the first embodiment of the present invention, and FIG. 5, FIG. 6 and FIG. 7 show a first lifting lug in the first embodiment of the present invention.

[0029] First, place the guide frame and connect the cable (S100).

[0030] As shown in FIG. 2, a guide frame is placed on top of a steel plate-concrete module. The guide frame may correspond to the shape of the upper surface of the steel plate-concrete module to be lifted, but is not limited thereto. The guide frame may be made of a steel structure or the like, and may be in a grid shape as shown in FIG. 2. In other embodiments, the guide frame may be various, such as a straight type or a ladder type, and may have various shapes through assembly and disassembly.

[0031] A plurality of first cables are connected between the steel plate-concrete module and the guide frame. A crane for lifting (not shown) is connected to the guide frame via a second cable. More specifically, as shown in FIGS. 3 and 4, the second cable is connected to a crane hook, and the crane can be connected to the crane hook.

[0032] Next, the center of gravity is determined through preliminary lifting (S200).

[0033] In preliminary lifting, a crane is used to separate the entire steel plate-concrete module from the ground, and the separation distance is minimized. As shown in FIGS. 3 and 4, the guide frame is provided with a tension measuring part capable of measuring the tension of each first cable.

[0034] When preliminary lifting is performed, the tension of each first cable, that is, the load burden of each first cable, can be measured through the tension measuring unit. The center of gravity of the steel plate-concrete module is calculated using the measured tension data for each first cable. This process can be performed using a computer and communication equipment. To this end, the tension data transmitted by the tension measuring unit includes identification information of the corresponding tension measuring unit (location information, coordinate information, or serial number of the tension measuring unit, etc.).

[0035] Through this process, the center of gravity is determined as shown in Fig. 3.

[0036] Afterward, the position of the weight is changed according to the identified center of gravity (S300).

[0037] The weight is located within the guide frame.

[0038] As shown in FIG. 3, a rail (not shown) is installed on the guide frame, and the weight moves and is fixed along the rail. The weight can be moved via a separate drive device, and the drive device can be controlled remotely.

[0039] Once the center of gravity located on the left side of the steel plate-concrete module is identified as in Fig. 3, the position of the weight is changed to match the identified center of gravity as in Fig. 4.

[0040] That is, the position of the weight is calculated such that the resultant force of the total vertical cable load and the rotational moment caused by the weight becomes zero, and the weight moves along the rail attached to the guide frame to maintain the horizontal alignment of the steel plate-concrete module.

[0041] Finally, the steel plate-concrete module is moved to the desired location using the self-amount (S400).

[0042] Since the main lifting is performed from the center of gravity of the steel-concrete module, the lifting is carried out stably, and deformation of the steel-concrete module is minimized.

[0043] A contact detection sensor and a fluid injection device are installed on the side of the steel plate-concrete module. During the main lifting process, the contact detection sensor detects whether there is a risk of collision between the steel plate-concrete module and adjacent modules, surrounding facilities, or structures. If there is a risk of collision, the fluid injection device is used to spray fluid, thereby moving the steel plate-concrete module in the opposite direction of the fluid injection to prevent the collision. The fluid injection device may be an air pressure injection device.

[0044] The contact detection sensor and fluid injection device may be coupled to the steam outlet of the steel plate-concrete module described below.

[0045] The lifting method according to the first embodiment described above requires a plurality of second cables, and since a majority of the second cables are in an inclined state, it can be applied in an external environment where there are preferably no interfering structures on the upper part of the guide frame or in an indoor environment with a high floor height.

[0046] In the above lifting method, the first cable is connected to the first lifting lug of the steel plate-concrete module.

[0047] Hereinafter, the first lifting rug will be described with reference to FIGS. 5 to 7. FIG. 5 is a side view of the first lifting rug, FIG. 6 is a top view of the first lifting rug, and FIG. 7 is a cross-section of the first lifting rug.

[0048] The first lifting lug is integrally connected to the steel plate-concrete module.

[0049] The steel plate-concrete module includes a first steel plate and a second steel plate that face each other and form an accommodating space (future, a concrete pouring space).

[0050] Each steel plate has studs extending into a receiving space, and each steel plate has steam vents installed at regular intervals to minimize the effect of pressure acting on the plate due to moisture evaporation from the concrete in the event of a fire. The steam vents may be formed in a matrix shape as shown in Fig. 5. In addition, tie bars connect the two steel plates.

[0051] The first lifting lug includes a first part and a second part connected to a steam outlet via a connecting bolt. The first part and the second part are located within the receiving space, extend vertically, and are in close contact with each steel plate. The first part and the second part may each be connected to a plurality of steam outlets.

[0052] The third part is provided in the form of a long flat plate outside the receiving space, and a first connecting ring is provided on the upper part. The first cable is connected to the first connecting ring. The third part is connected to the first and second parts through reinforcing members and bolt connections, etc.

[0053] The first lifting lug can be removed from the steel plate-concrete module once the lifting is completed.

[0054] Hereinafter, a lifting method according to a second embodiment of the present invention will be described with reference to FIGS. 8 to 11.

[0055] FIGS. 8 and 9 show the position change of a weight within a guide frame in the second embodiment of the present invention, and FIGS. 10 and 11 show the second lifting lug in the second embodiment of the present invention.

[0056] In the second embodiment, the second cable is provided as a single unit and is connected to the center of the frame body.

[0057] In the second embodiment, the first cable is connected to the second lifting lug. FIG. 10, which shows the second lifting lug, is a view of the second lifting lug from above, and FIG. 11 shows a cross-section of the second lifting lug.

[0058] The second lifting lug is coupled to a tie bar connecting the first steel plate and the second steel plate. In the second embodiment, the tie bar protrudes outside the receiving space to form a first protrusion and a second protrusion. The second lifting lug includes a plate-shaped lug body, and the lug body is positioned parallel to the outside of the receiving space. The lug body also protrudes outside the receiving space, and the lug body is coupled to the protrusion of the tie bar.

[0059] A second connecting ring is located on the upper part of the lug body, and the first cable is connected to the second connecting ring.

[0060] The second lifting lug can be removed from the steel plate-concrete module once the lifting is completed.

[0061] Since the lifting method according to the second embodiment does not have an inclined cable among the second cables, it can be applied even in indoor environments where there is an interfering structure on the upper part of the guide frame or where the floor height is not high.

[0062] The shape of the lifting lug according to the first and second embodiments described above can be selected depending on whether the steam outlet and tie bar are arranged at the first cable connection location, etc.

[0063] In the present invention, the guide frame is provided as a unit guide frame of a certain size and can be combined with one another as needed. FIGS. 12a, 12b, and 12c illustrate the combination of unit guide frames according to the size and shape of the steel plate-concrete module. If a unit guide frame corresponding to one module is provided as in FIG. 12a, two or three unit guide frames can be connected and used for two modules as in FIG. 12b and three modules as in FIG. 12c, respectively.

[0064] Large steel plate-concrete modules are vulnerable to lateral deformation caused by horizontal loads when lifted by conventional methods. In order to prevent this, the present invention uses a guide frame in the middle to prevent horizontal loads and lateral deformation.

[0065] In the case of irregular and complex modules, it is difficult to calculate the center of gravity for maintaining the horizontal balance of the structure, so measures such as lifting analysis must be performed in advance. In this invention, a cable tension and coordinate recognition device is installed on the upper part of the first cable to automatically calculate the center of gravity without prior analysis measures, and the crane moves to the center of gravity point by reflecting this.

[0066] Through the present invention, on-site construction, such as lifting and moving large steel plate-concrete modules, can be performed safely and quickly, thereby contributing to shortened construction time and improved constructability through increased work efficiency.

[0067] The aforementioned embodiments are examples for explaining the present invention, and the present invention is not limited thereto. Since a person skilled in the art to which the present invention pertains can implement the present invention by making various modifications therefrom, the technical scope of protection of the present invention should be determined by the appended claims.

Claims

1. A method for lifting a steel plate-concrete module using a center of gravity, A step of horizontally arranging a guide frame located on the upper part of the steel plate-concrete module, connected to the steel plate-concrete module by a plurality of first cables, and connected to a crane through a second cable, wherein the guide frame includes a weight; A step of pre-lifting the guide frame and measuring the tension of each of the plurality of first cables; A step of determining the center of gravity of the steel plate-concrete module based on the measured tension; and A lifting method comprising the step of adjusting the position of the weight within the guide frame according to the identified center of gravity and lifting.

2. In Paragraph 1, The above guide frame is, Frame body; and It further includes a rail coupled to the upper part of the above-mentioned frame body, A method in which the above-mentioned weight is coupled to the rail so as to be movable along the rail.

3. In Paragraph 2, The above steel plate-concrete module is, A first steel plate and a second steel plate facing each other with a receiving space in between; Steam outlets formed in the first and second steel plates; It includes a first lifting lug connected to the first steel plate and the second steel plate using a connecting bolt through the steam outlet, and A method in which the above plurality of first cables are connected to the above first lifting lug.

4. In Paragraph 3, The above-mentioned first lifting rug is provided in multiple numbers, and Each of the above first lifting rugs is, A first part connected to the first steel plate and extending in a vertical direction; A second part facing the first part, coupled to the second steel plate, and extending in a vertical direction; and A third part located outside the above-mentioned receiving space, combined with the first part and the second part, and arranged in a horizontal direction; and It includes a first connecting ring coupled to the third part above, A method in which the plurality of first cables are connected to each of the first coupling rings.

5. In Paragraph 2, The above steel plate-concrete module is, A first steel plate and a second steel plate facing each other with a receiving space in between; A tie bar connecting the first steel plate and the second steel plate, with at least a portion of which is positioned horizontally within the above-mentioned receiving space; and It includes a plurality of second lifting lugs connected to the above tie bar, A method in which a plurality of first cables are connected to each of the second lifting lugs.

6. In Paragraph 5, The above tie bar is, A first protrusion protruding to the outside of the first steel plate; and It includes a second protrusion protruding outward from the second steel plate, The above second lifting lug is connected to the above first protrusion and the above second protrusion and is coupled to the above first steel plate and the above second steel plate.

7. In Paragraph 6, The above-mentioned second lifting rug is, A plate-shaped lug body extending in the horizontal direction; and It includes a second connecting ring coupled to the above lug body, A method in which the plurality of first cables are connected to each of the second connecting rings.

8. In Paragraph 2, A method of using a plurality of guide frames combined according to the shape and size of the above steel plate-concrete module.

9. In Paragraph 3, A contact detection sensor and a fluid injection device are installed on the side of the above steel plate-concrete module, and In the above amount, A method for adjusting the position of the steel plate-concrete module by injecting fluid through the fluid injection device when a collision risk is detected through the contact detection sensor.

10. In Paragraph 9, A method in which the above contact detection sensor and the above fluid injection device are coupled to the above steam outlet.

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