KR101282243B1 - A construction method using the column cap for permanent beam form - Google Patents

Abstract

The present invention is the structure of the pillar cap for joining the PC pillar and the permanent pillar, and using the pillar cap to install the deck plate on the permanent pillar bonded to the PC pillar to complete the underground structure by batch concrete pouring The method relates to a construction method, wherein the pillar cap connects between a rectangular plate-shaped lower frame and a rectangular plate-shaped upper frame corresponding to the shape of the lower frame, and the lower frame and the upper frame, which are placed on an upper portion of the PC pillar. It is made of a plate-shaped blocking member, the outer edges of the lower frame and the upper frame has a larger or at least the same size than the cross section of the PC pillar, the lower opening of the size smaller than the cross section of the PC pillar inside the lower frame And an upper opening having a size equal to or smaller than the cross section of the PC pillar in the upper frame, and among the four side surfaces of the blocking member. At least one is characterized in that the security insertion surface is formed in the lower frame to form a permanent insertion die is formed in the insertion hole.

Description

A construction method using the column cap for permanent beam form}

The present invention relates to an accessory for installing beams on PC pillars in the construction of underground structures such as underground parking lots, and a method for constructing the main structural parts of underground structures using the same, particularly in factories such as metal permanent formwork and deck plates. The present invention relates to a method for constructing underground structures using an attached device that can use a manufactured lightweight member and couple them safely and easily to a PC column.

PC concrete members are capable of thorough quality control, and they can be shortened by simply assembling them in the field, and can be used in construction sites because they have many advantages, such as shortening the air and saving the provisional equipment and labor costs.

In particular, in the construction of underground structures such as underground parking lots, the construction site is narrow, so it is much more economical to use dry concrete method using PC concrete member than conventional wet method. Research and development.

As a method of constructing underground structures using PC concrete members, construction methods mainly used up to now include: ⒜ installing a PC pillar; 하프 installing a half PC beam on the upper surface of the PC pillar, ⒞ between the half PC beams. The step consists of installing a half PC slab and curing the concrete by placing concrete on the upper surface of the half PC beam and the half PC slab. The conventional technology is that the half PC beam and the half PC slab is very heavy, so it is not possible to lift by conventional tower crane for the ground structure installation, so a large capacity special crane must be used, and thus equipment usage is additionally generated. Since the PC slab needs a lot of temporary materials to support the half PC beams placed there, there was a problem that the increase of temporary materials cost and the risk of construction also increased.

In order to improve the above problems, the 'PC-complexing method of underground parking lot and the PC pillar-beam joint structure of Janspan PC beam' used for the application of Patent Application No. 10-2005-0077681 filed Aug. 24, 2005 is proposed. There is a bar. As shown in FIG. 1, the improvement technique is (a) digging at the location where the underground parking lot is to be constructed, placing the bottom concrete 10 to a predetermined thickness, and then installing the retaining wall formwork 30 and reinforcing bars 32. Step) and then installing a plurality of PC columns 20 according to the structural plan; (b) Extruding portions are formed at both lower ends on the upper surfaces of the plurality of PC pillars 20, and fixedly install the end PC beams 42 having a U-shaped cross section, and protrude at both upper ends between adjacent end PC beams 42. Installing a central PC beam 44 having a portion formed and having a U-shaped cross section; (c) installing a half PC slab (50) on top of the PC beams (42, 44) and placing reinforcing bars on the slab (50); (d) placing concrete 60 on the slab 50 and on the retaining wall 30 at the same time, wherein step (b) includes reinforcing rods 21 of the PC column 20 end PC beams 42 Penetrate the sleeve (23) pre-embedded in the end PC beam (42) so as to penetrate, and fill the mortar with cement mortar in the sleeve (23), and then tighten the nut to connect the end PC beam (42) to the column (20). It is characterized in that it is installed and filled with non-shrink mortar over the upper end portion of the central PC beam 44 in the lower end portion of the adjacent end PC beam 42. As a result, the unit loads of the half beams and the half slab decreased, but the work load increased significantly, such as the number of loads increased, and the load of the half beams in which the overall half slab was placed was maintained as it was. There is no improvement in the means compared to the prior art.

The present invention is to improve the problems with the prior art, while significantly reducing the load of the half PC beam and the half PC slab before placing concrete, so that the tower crane for ground structure construction can be carried out as it is, the beam The purpose is to reduce the number of temporary materials to support, to make the construction safer and more efficient, and to provide a construction method for underground structures that can be subjected to high quality control.

In order to achieve the above object, the present invention is characterized in that the construction of the underground structure by installing a permanent formwork on the PC pillar through a special accessory device, placing the deck plate on the permanent formwork and then placing concrete There is this.

According to the present invention, there is provided the above-mentioned accessory device, which includes a rectangular plate-shaped lower frame placed on an upper portion of the PC pillar, a rectangular plate-shaped upper frame corresponding to the shape of the lower frame, and a plate connecting the lower frame and the upper frame. Consists of a blocking member of the lower frame and the outer edge of the upper frame has a size greater than or at least the same as the cross section of the PC pillar, the inner side of the lower frame to form a lower opening smaller than the cross section of the PC pillar And an upper opening having a size equal to or smaller than the cross section of the PC pillar, and at least one of the four side surfaces at which the blocking member is positioned, a insertion hole is formed to settle the permanent mold. Secure landing surface is characterized by using a pillar cap for permanently formed formwork formed on the lower frame.

In another aspect, the present invention further has a feature of forming a fitting portion of a square tube shape on the bottom of the lower frame of the pillar cap, or further forming a bolt hole in each corner of the lower frame.

In another aspect, the present invention is another feature to form a stiffener reinforcement on one surface of the blocking member of the pillar cap.

In another aspect, the present invention has another feature to further form a connection bracket for coupling with the permanent formwork on the left and right sides of the pillar insertion port insertion hole.

The present invention uses a PC member, a permanent permanent mold made of metal, and a pillar cap manufactured under a high quality control, and in the field, it is assembled only to perform concrete pouring, so that quality is improved and mechanized construction is possible, thereby improving the performance. In addition, the use of temporary materials such as copper barks and heavy equipment, the labor force on site can be greatly reduced, and the air can be shortened, so it can be expected to have an economical and effective effect of reducing the risk of safety accidents.

1 is a perspective view showing the construction method of an underground structure according to the prior art.
Figures 2a to 2d is a first embodiment of the present invention pillar cap modified according to the use position.
Figure 3 is a second embodiment of the present invention pillar cap.
Figure 4 is a perspective view of the shape of the pillar cap of the present invention coupled to the PC pillar.
Figure 5a, 5b is an embodiment of the means for coupling the column cap of the present invention with a PC column.
6a to 6e are perspective views showing each step of constructing the underground structure using the pillar cap of the present invention.
Figure 7 is an embodiment showing a case of coupling to the column cap by forming a cobell on the PC pillar of the present invention.
8 is an embodiment in which the connecting bracket and the permanent bog die attached to the pillar cap of the present invention by fastening with a connection nut.
9 is a perspective view showing the shape of the connection nut for fastening the connection bracket and the permanent bobbin.

Hereinafter, with reference to the accompanying drawings an embodiment of the present invention will be described in detail. However, in describing the present invention, when the technical concept of the present invention is obscured or obscured by describing the known configuration in detail, the description of the known configuration will be omitted.

The present invention is the structure of the pillar cap 200 for coupling the PC pillar 100 and the permanent bobbin 400, and the permanent bobbin 400 coupled to the PC pillar 100 using the pillar cap 200 After installing the deck plate 500) relates to a construction method of completing the underground structure by batch concrete pouring. Of course, it can be said that the PC pillar 100 may be replaced with reinforced concrete or steel reinforced concrete at the site, thereby replacing it with those skilled in the art.

The pillar cap 200 for coupling the PC pillar 100 and the permanent formwork 400 maintains the overall shape of the lower frame 210 and the pillar cap 200 placed on the upper portion of the PC pillar 100. The main frame is formed between the upper frame 220 and the lower frame 210 and the upper frame 220 and a blocking member 230 that serves as a formwork when placing concrete. 2A to 2D show various embodiments according to the use position of the pillar cap 20, that is, the coupling position with the permanent formwork.

Since the lower frame 210 is a rectangular plate-like member, while the function as a configuration for coupling with the PC pillar 100 should form a secure mounting surface 240 that can be placed in the permanent formwork 400, The outer end surface of the lower frame 210 is most preferably formed to be somewhat larger than the cross section of the PC pillar 100, as shown in Figures 2a to 2d, the width of the permanent formwork 400 is sufficient without cross-sectional loss of the column To be seated. However, as shown in FIG. 3, the outer end surface of the lower frame 210 may be aligned with the cross section of the PC pillar 100 to remove the protruding portion that inhibits the appearance of the pillar.

Meanwhile, a lower opening 290 is formed inside the lower frame 210 to ensure the integrity of the concrete 600 to be poured in the future. The size of the lower opening 290 is smaller than the cross section of the PC pillar 100 so that the PC pillar 100 does not penetrate the lower opening 290, but the specific size is the width of the permanent mold 400 is seated and Determine the location of column reinforcement. Figure 4 shows the lower frame 210 of the pillar cap 200 is placed on the upper edge of the PC pillar 100,

The upper frame 220 is also formed of a rectangular plate-like member corresponding to the lower frame 210. The upper frame 220 is coupled to the upper end of the blocking member 230 to be described later so that the overall shape of the pillar cap 200 can be maintained as it is during the construction process. An upper opening portion 300 is formed inside the upper frame 220 similarly to the lower frame 210, and the concrete 600 is poured through the upper opening portion 300. Unlike the lower frame 210, the upper frame 220 does not need to protrude to the inside of the blocking member 230, so that the size of the upper opening 300 matches the inner surface of the blocking member 230 so that the upper portion of the upper frame 220 may be disposed. It may be desirable to eliminate the possibility of voids in the lower portion of the frame 220. However, as shown in FIG. 3, when the outer end surface of the lower frame 210 coincides with the cross section of the PC pillar 100, the upper edge 220 should also coincide with the cross section of the PC pillar 100. The upper frame 220 will have a shape protruding into the blocking member 230.

The lower frame 210 and the upper frame 220 are connected by a plate-shaped blocking member 230, whereby the pillar cap 200 has an overall hexahedral shape. The blocking member 230 functions as a formwork for the concrete 600 that is poured into the pillar cap 200, which prevents the entire blocking member 230 'and one part blocking the entire surface. Member 230 ". The front blocking member 230 'is used for the surface where the beam is not installed, and the partial blocking member 230" is the surface for forming the beam insertion hole 250 for installing the beam. Used for At least one stiffener reinforcement 280 connected to the lower frame 210 and the upper frame 220 is attached to one surface, preferably an outer surface of the front blocking member 230 ′, so as to be filled by side pressure during concrete pouring. prevent.

At least one of the four side surfaces in which the blocking member 230 is positioned is formed with the insertion hole 250, the lower frame 210 positioned below the insertion hole 250 forms a security wear surface 240. . The insertion hole 250 may be located in the center of the side or may be positioned in any one side. At this time, the portion of the upper frame 220 forming the upper boundary of the insertion hole 250 may be removed to have an open shape. In this case, the blocking members 230 forming the other side are not opened or soiled. A separate means may be required to maintain the vertical shape without change.

It is preferable to further attach a connection bracket 260 for coupling with the permanent pompom 400 on the left and right sides of the beam insertion opening (250). The connection bracket 260 is provided with at least one fastening hole 270, and the corresponding fastening hole 270 is also provided on the side of the corresponding permanent bore 400.

The lower surface of the lower frame 210 may further include a fitting portion 310 for coupling with the PC pillar 100, as shown in Figure 5a. The fitting portion 310 has a square tube shape so that the head of the PC pillar 100 can be inserted. On the other hand, as shown in Figure 5b, by forming the bolt hole 320 in each corner of the lower frame 210 may not have a configuration of the fitting portion 310. The bolt hole 320 is bolted to the buried hardware 110 is pre-installed on the head of the PC pillar (100). In addition, the pillar cap 200 may be coupled to the PC pillar 100 by welding the lower frame 210 to the buried hardware 110 pre-installed on the head of the PC pillar 100, in the case of using such a coupling method It will be apparent to those skilled in the art that the lower frame 210 need not be provided with the fitting portion 310 or the bolt hole 320.

Hereinafter, a preferred embodiment of constructing an underground structure by using the pillar cap 200 and the permanent mold 400 will be described. The following embodiment is an example of using the PC pillar 100 manufactured in the factory, but is also applicable to the concrete pillars that are placed in place of the PC pillar 100 as described above. .

The construction method of the underground structure according to the present invention, as shown in Figure 6a to 6e, bringing the PC column 100 to the site to combine the pillar cap 200 (see Figure 6a), pillar cap 200 Fixed installation of the combined PC column 100 on the foundation or floor concrete (see Fig. 6b), the step of integrally coupling the permanent formwork 400 to the beam insertion hole 250 of the pillar cap 200 ( 6c), the deck plate 500 is installed on the permanent bobbin 400 (see FIG. 6d), and the concrete 600 is poured into the permanent bobbin 400 and the deck plate 500 After curing it is made to complete the underground structure (see Figure 6e).

The PC pillar 100 is to be installed in advance in the head of the PC pillar 100 in the factory before the carry-on to the site. The buried hardware 110 has a different structure depending on the coupling method with the pillar cap 200. For example, in the case of the fitting method, it would be desirable to have the buried hardware 110 to have a rectangular border shape surrounding the four sides of the head of the PC pillar 100 to facilitate the close fitting (see FIG. 5A). In the case of using the PC pillar 100, each of the corners of the head hole using a buried hardware 110 is formed (see Fig. 5b), or anchor bolt formed buried hardware 110 may be used (not shown) ), In the case of the welding method, it is preferable to have the same shape as the lower frame 210 to facilitate the welding of the pillar cap 200 with the lower frame 210.

To the head of the PC pillar 100 brought into the field, as shown in Figure 6a, prior to installing the PC pillar 100 is coupled to the pillar cap 200 above. As described above, the coupling between the PC pillar 100 and the pillar cap 200 welds the embedded steel 110 and the lower frame 210 of the pillar cap 200 to each other in advance. Or, to fix the PC pillar 100 in which the rectangular rim embedded hardware 110 is inserted into the fitting portion 310 of the column cap 200, or the embedded steel 110 formed with a bolt hole of the PC pillar 100 And it may be made to fasten the bolt hole 320 provided at each corner of the lower frame 210 of the pillar cap 200 with a bolt.

Meanwhile, the pillar cap 200 coupled to the PC pillar 100 may use an outer end surface of the lower frame 210 coinciding with the cross section of the PC pillar 100, as shown in FIG. 3, but in FIGS. 2A to 2D. As shown, using a larger than the cross section of the PC pillar 100 can be said to be structurally safe and easy to construction by preventing cross-sectional defects. However, the lower frame 210 protruding from the outer surface of the column is not so good in appearance, so if necessary, if the outer surface of the lower frame 210 is formed larger than the main surface of the PC pillar 100 PC pillar 100 The cross section of the head may solve the above problem by forming a corbel 710 to coincide with the protruding outer end surface of the lower frame 210. FIG. 7 illustrates a shape in which a cobell is formed on the head of the PC pillar 100 to couple the PC cap 200.

PC column 100 coupled to the column cap 200 is fixed to the foundation or floor concrete using a crane. 6b shows a state in which the PC pillars 100 are installed at respective positions of the floor concrete. The PC pillar 100 is installed vertically using anchor bolts, etc., which are pre-buried in the floor concrete, and are completely fixed by filling with non-contraction mortar therebetween.

When the installation of the PC pillar 100 is completed, as shown in FIG. 6C, the step of mounting the permanent mold 400 on the pillar cap 200 coupled to the head of the PC pillar 100 is performed.

The permanent formwork 400 is brought into the field in the state of being manufactured by pre-assembling the reinforcing bars of the beam in the factory as a metal material. The permanent formwork 400 is not only need to be demoulded in the future, there is an advantage that can be sufficiently lifted only by the crane for ground water construction because the weight is much lighter than the half PC beam.

Imported permanent mold 400 is inserted into the insertion hole 250 of the column cap 200 is mounted on the security surface 240, the end of the permanent mold 400 is the inner surface of the security surface 240 Permanent formwork 400 to be matched to be securely mounted on the secure landing surface 240, but the mounting width of the at least 50mm or more would be preferable in terms of structural safety. When the mounting of the permanent bobbin 400 is completed, the fastening holes 270 of the connecting bracket 260 provided on the left and right sides of the bor insertion hole 250 and the fastening holes provided on the left and right sides of the permanent bobbin 400 are bolted. By fastening the pillar cap 200 and the permanent formwork 400 to be fixed integrally. 8 shows that the permanent formwork 400 is bolted after being inserted into the insertion hole 250 of the column cap 200.

The bolt fastening is preferably such that one long bolt penetrates the left and right coupling surfaces of the permanent mold 400, but may be bolted individually for each coupling surface. As another embodiment, a connection nut in which female threads are formed as shown in FIG. 9 may be used. In this case, after the concrete construction is completed, it is possible to expect the effect of smoothly treating the outer surface of the beam by removing the bolts and the like fastened to the female thread line.

When the process of installing the permanent bobbin 400 to the PC pillar 100 through the pillar cap 200 is completed, the deck plate 500 pre-assembled slab reinforcement as shown in Figure 6d is permanent After placing the upper end of the formwork 400, the deck plate 500 and the upper end of the permanent formwork 400 is coupled to the spot welding. Like the permanent formwork 400, the weight of the deck plate 500 is much lighter than the half PC slab, so it is possible to safely proceed with the construction of the ground structure installation crane without using a large special crane. In addition, the number of temporary materials for supporting the lower surface of the permanent formwork 400 can be significantly reduced.

As described above, the installation of the permanent formwork 400 and the deck plate 500 is completed by placing the concrete 600 for beams and slabs at once (see Fig. 6e) to cure them to complete the underground structure.

The present invention has been described in detail above with reference to specific embodiments, but the above embodiments are merely examples for easy understanding of the present invention, and therefore, substitutions, additions, and modifications within the scope do not depart from the spirit of the present invention. Embodiments will also belong to the protection scope of the present invention as defined by the claims below.

100: PC pillar 110: embedded hardware
200: pillar cap 210: lower frame
220: upper frame 230: blocking member
230 ': front blocking member 230 ": partial blocking member
240: secure landing 250: the insertion slot
260: connection bracket 270: fastening hole
280: stiffener reinforcement 290: lower opening
300: upper opening 310: fitting portion
320: bolt hole 400: permanent formwork
500: deck plate 600: concrete
710: Kovel

Claims (12)

delete delete delete delete delete In constructing underground structures using pillar caps,
단계 Bringing the PC pillar 100 manufactured at the factory and installed with the embedded hardware 110 on the head of the column,
판 a rectangular plate-shaped lower frame 210, a rectangular plate-shaped upper frame 220 corresponding to the shape of the lower frame 210, and a plate-shaped connecting between the lower frame 210 and the upper frame 220 Containing member 230, the outer end surface of the lower frame 210 and the upper frame 220 has a size greater than or at least the same as the cross section of the PC pillar 100, the lower frame of the 210 A lower opening portion 290 having a smaller size than a cross section of the PC pillar 100 is formed inside, and an upper opening portion 300 having a size equal to or smaller than a cross section of the PC pillar 100 is formed inside the upper frame 220. ), And at least one of the four side surfaces of the blocking member 230 is formed, the insertion hole 250 is formed so that the secure mounting surface 240 is formed on the lower frame 210 and the lower frame 210. Pillar cap 200 is formed on the bottom surface of the square tube-shaped fitting portion 310; Integrating the PC rim 100 and the pillar cap 200 by combining in a structure that is inserted into the square rim embedded hardware 110 installed in the head of the PC pillar 100,
영구 Bringing the permanent bobbin 400 made in the factory to the site and secured to the secure mounting surface 240 formed in the insertion slot 250 of the pillar cap 200, the permanent bobbin 400 and the pillar cap Integrally coupling the 200,
⒟ placing the deck plate 500 manufactured at the factory on the upper end of the permanent bobbin 400, and then coupling the upper end of the deck plate 500 and the permanent bobbin 400 by spot welding,
⒠ After pouring the beam and slab concrete 600, curing the underground structure of the underground structure using a pillar cap, characterized in that it comprises the step of curing the slab to the underground parking lot In constructing underground structures using pillar caps,
PC step of bringing the PC pillar 100, which is manufactured at the factory and installed on the head of the column, with the rectangular rim embedded hardware 110,
사각형 a rectangular plate-shaped lower frame 210 having a bolt hole 320 at each corner, a rectangular plate-shaped upper frame 220 corresponding to the shape of the lower frame 210, the lower frame 210 and It consists of a plate-shaped blocking member 230 connecting between the upper frame 220, the outer end surface of the lower frame 210 and the upper frame 220 is larger than or at least the same size as the cross section of the PC pillar (100). Has a lower opening 210 of the size smaller than the cross-section of the PC pillar 100, the inside of the lower frame 210, the inside of the upper frame 220 of the PC pillar 100 An upper opening portion 300 having a size equal to or smaller than a cross section is formed, and at least one of the four side surfaces at which the blocking member 230 is disposed is formed with an insertion hole 250, so that the secured surface 240 has the lower frame ( The pillar cap 200 formed in the 210 is placed on the head of the PC pillar 100, and the bolt hole 320 and the embedded steel of the lower frame 210 are embedded. Fastening the bolt hole of the 110 with a bolt to integrate the PC pillar 100 and the pillar cap 200,
영구 Bringing the permanent bobbin 400 made in the factory to the site and secured to the secure mounting surface 240 formed in the insertion slot 250 of the pillar cap 200, the permanent bobbin 400 and the pillar cap Integrally coupling the 200,
⒟ placing the deck plate 500 manufactured at the factory on the upper end of the permanent bobbin 400, and then combining the deck plate 500 and the upper end of the permanent bobbin 400 by spot welding,
⒠ After pouring the beam and slab concrete 600, curing the underground structure of the underground structure using a pillar cap, characterized in that it comprises the step of curing the slab to the underground parking lot In constructing underground structures using pillar caps,
PC Bringing the PC pillar 100, which is manufactured in the factory and installed with the embedded steel 110 having a bolt hole formed in the head of the column,
판 a rectangular plate-shaped lower frame 210, a rectangular plate-shaped upper frame 220 corresponding to the shape of the lower frame 210, and a plate-shaped connecting between the lower frame 210 and the upper frame 220 Containing member 230, the outer edge of the lower frame 210 and the upper frame 220 has a size larger or at least the same size as the cross-section of the PC pillar 100, the lower frame 210 ) Is formed in the lower opening 290 having a smaller size than the cross section of the PC pillar 100, the upper opening 220 of the upper frame 220 of the same or smaller size than the cross section of the PC pillar 100 Forming a 300, at least one of the four sides of the blocking member 230 is a bore insertion hole 250 is formed so that the secure mounting surface 240 is formed on the lower frame (210) ) Is placed on the head of the PC pillar 100, the embedded steel 110 and the lower frame 210 by welding each other PC pillar 100 and the pillar A step of integrating (200),
영구 Bringing the permanent bobbin 400 made in the factory to the site and secured to the secure mounting surface 240 formed in the insertion slot 250 of the pillar cap 200, the permanent bobbin 400 and the pillar cap Integrally coupling the 200,
⒟ placing the deck plate 500 manufactured at the factory on the upper end of the permanent bobbin 400, and then coupling the upper end of the deck plate 500 and the permanent bobbin 400 by spot welding,
⒠ After pouring the beam and slab concrete 600, curing the underground structure of the underground structure using a pillar cap, characterized in that it comprises the step of curing the slab to the underground parking lot The method according to any one of claims 6 to 8, wherein the means for integrally coupling the permanent formwork 400 and the pillar cap 200 of the ⒞ step, left and right of the insertion slot 250 of the permanent formwork 400 Attaching the connection bracket 260 formed with a fastening hole 270 on the surface, and forming a fastening hole on both sides of the permanent bobbin 400, the bolt fastening the fastening hole 270 and the fastening hole with a bolt Construction method of underground structure using pillar cap, characterized in that The method according to any one of claims 6 to 8, wherein at least one of the permanent formwork 400 and the deck plate 500 is made of a pre-assembled reinforcing bar in the factory using a pillar cap Construction method of underground structure 10. The method of claim 9, wherein at least one stiffener reinforcement 280 is further formed on one surface of the front blocking member 230 ′ of the blocking member 230 between the upper frame 220 and the lower frame 210. Construction method of underground structure using pillar cap The method of claim 11, wherein the outer surface of the lower frame 210 is formed larger than the main surface of the PC pillar 100, the head cross-section of the PC pillar 100 and the outer surface of the lower frame (210) To coincide, the construction method of the underground structure using a pillar cap, characterized in that the nose bell 710 is formed on the head of the PC pillar (100).

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