JP4343615B2 - Mounting structure and mounting method of pile head base plate to steel pipe pile in bolt connection structure of steel pipe pile and column - Google Patents

Description

  The present invention relates to a mounting structure and a mounting method of a pile head base plate to a steel pipe pile in a bolt connection structure of a steel pipe pile and a column in which a pile head base plate on a steel pipe pile side and a base plate on a column side are jointed with bolts.

  In a structure in which the steel pipe pile and the column are connected by connecting the pile head base plate on the steel pipe pile side and the base plate on the column side with bolts, the steel pipe pile will be driven eccentrically in the horizontal direction from the predetermined driving position. Therefore, the mounting of the pile head base plate to the steel pipe pile is generally performed in the field after the steel pipe pile is driven into the ground.

  In this case, as a method of attaching the pile head base plate to the steel pipe pile, for ease of installation, a pile head base plate having a through hole of a size suitable for the outer periphery of the pile head of the steel pipe pile is used, and the steel pipe pile is installed in the through hole. A method is adopted in which the periphery of the through hole is welded from the upper surface side of the pile head base plate to the outer periphery of the pile head of the steel pipe pile through the pile head.

  In order to absorb the horizontal misalignment of the steel pipe pile driven into the ground by the position of the through hole formed in the pile head base plate, the direction and size of the steel pipe pile driven into the ground is Measure at the site, determine the processing position of the through hole for the pile head base plate based on the measurement results, drill the through hole in the pile head base plate at the factory, and attach it to the steel pipe pile at the site as described above Is done.

  However, if the horizontal displacement of the steel pipe pile driven into the ground is absorbed by the method described above, it takes a lot of time from hitting the steel pipe pile to attaching the pile head base plate to the pile. There was a problem of need.

  In view of the above problems, the present invention can significantly reduce the time from hitting a steel pipe pile to attaching a pile head base plate to the pile, in the steel pipe pile and column bolt connection structure. It is an object of the present invention to provide a mounting structure and a mounting method of a pile head base plate to a pile.

The above problem is a mounting structure of a pile head base plate to a steel pipe pile in a bolt connection structure of a steel pipe pile and a column in which a pile head base plate on a steel pipe pile side and a base plate on a column side are jointed with bolts,
A sub-plate having a through hole of a size that fits the outer periphery of the pile head of the steel pipe pile is passed through the through hole so that the pile head of the steel pipe pile protrudes upward from the sub plate, and the surrounding part of the through hole is the sub-plate. Welded to the outer periphery of the pile head of the steel pipe pile on the upper surface side of the plate,
The pile head base plate is provided with a through-hole of a size larger than the pile head outer periphery size of the steel pipe pile,
The pile head base plate is piled up on the sub plate with the pile head extra length projecting from the through hole so that the bolt hole is aligned with the bolt hole of the column side base plate, It is solved by the mounting structure of the pile head base plate to the steel pipe pile, which is welded to the upper surface portion of the steel pipe.

  In this mounting structure, the pile head base plate is provided with a through hole with a size larger than the outer circumference of the steel pipe pile. Therefore, even if the steel pipe pile is misaligned in the horizontal direction, It does not hinder the matching of the bolt holes in the base plate and the bolt holes in the column side base plate. For this reason, the through holes are processed in advance in the pile head base plate regardless of the horizontal misalignment of the steel pipe pile. be able to. Therefore, after the steel pipe pile is driven into the ground at the site, a sub plate is attached to the pile head of the steel pipe pile, and the pile head base plate is placed on the sub plate so that the bolt holes of the pile head base plate and the bolt holes of the column side base plate match. If it piles up, the core shift | offset | difference in the horizontal direction of a steel pipe pile will be absorbed, and the time after attaching a pile head base plate to this pile after striking a steel pipe pile can be shortened significantly.

  Moreover, the sub plate is of a size that fits the outer periphery of the pile head of the steel pipe pile, and is passed through the through hole so that the pile head of the steel pipe pile protrudes upward from the sub plate. Since the periphery of the through hole has a structure that is welded to the outer periphery of the pile head of the steel pipe pile on the upper surface side of the subplate, the subplate and the steel pipe pile can be easily welded downward. In addition, the pile head base plate has a structure in which the pile head surplus length part is protruded from the through hole and is superimposed on the sub plate, and the periphery of the through hole is joined to the upper surface portion of the sub plate by welding. Welding between the head base plate and the sub-plate can be easily performed downward. In this way, it is possible to easily attach the pile head base plate to the steel pipe pile by welding while using the sub-plate.

In the above mounting structure, the outer peripheral shape of the sub-plate has an oval shape that connects the ends of a pair of semicircles,
The through-hole opened in the sub-plate is a circular hole and is provided eccentrically so as to be concentric with either one of the outer peripheral semicircular parts,
The through hole of the pile head base plate may be a circular hole having a diameter smaller than the diameter of the outer semicircular portion of the sub plate.

  In this case, the horizontal direction of the steel pipe pile is determined by directing the sub-plate in the anti-centered direction at the outer periphery of the steel pipe pile against the horizontal deviation of the steel pipe pile and overlapping the pile head base plate on it. Can be absorbed by the sub-plate having a small plane size, and the plane size of the pile head base plate can also be kept small. Moreover, with the pile head base plate overlaid on the sub plate, the periphery of the through hole of the pile head base plate can be located on the upper surface of the sub plate over the entire circumference, ensuring the welded portion of the pile head base plate to the sub plate. Is easy.

Moreover, the receptacle which receives a subplate from the lower part is provided in the pile head outer peripheral part,
The sub plate may have an outer peripheral portion welded to a lower surface portion of the pile head base plate.

  In this case, attachment can be performed as follows. That is, after driving the steel pipe pile into the ground, the sub plate is passed through the through hole so that the pile head of the steel pipe pile protrudes upward from the sub plate, and the lower surface side of the sub plate is received by the receiver. Next, the pile head base plate is overlaid on the upper surface portion of the sub plate so that the pile head surplus portion protrudes from the through hole, and the through hole peripheral portion of the pile head base plate is welded to the upper surface portion of the sub plate. This welding can be easily performed downward. Next, the pile head base plate and the sub plate are turned upside down, and the outer peripheral portion of the sub plate is welded to the upper surface portion of the pile head base plate. This welding can be easily performed downward, and the pile head base plate and the sub plate can be firmly joined together with the first welding. Subsequently, the pile head base plate and the sub plate are further turned upside down, the sub plate is received by the receiver, and the peripheral portion of the through hole of the sub plate is welded to the outer periphery of the pile head on the upper surface side of the sub plate. This welding can also be easily performed downward. In this way, by providing the support, the pile head base plate can be easily attached to the steel pipe pile by welding, and the pile head base plate and the sub plate can be firmly joined.

  In addition, when the pile head base plate is filled with a filler such as non-shrink mortar, the pile head base plate is bent and compressed by the filler while the through hole size of the pile head base plate is larger than the outer periphery size of the steel pipe pile. A wide area is ensured, and a joint structure that is strong against bending can be realized.

In addition, the above-described problem is a method of attaching a pile head base plate to a steel pipe pile in a bolt connection structure of a steel pipe pile and a column in which a pile head base plate on a steel pipe pile side and a base plate on a column side are jointed with bolts,
A sub-plate that has a through hole of a size that fits the outer periphery of the pile head of the steel pipe pile, and is welded to the outer periphery of the pile head;
A pile head base plate that has a through-hole that is larger than the pile head outer periphery size of the steel pipe pile and is welded to the sub-plate,
After driving the steel pipe pile into the ground,
The sub plate is installed in the steel pipe pile through the through hole so that the pile head of the steel pipe pile protrudes upward from the sub plate,
The pile head base plate is placed on the upper surface of the sub-plate with the pile head extra length protruding from the through hole so that the bolt hole matches the bolt hole of the column side base plate. It can also be solved by the mounting method of the pile head base plate.

  In this mounting method, because the pile head base plate provided with a through hole of a size larger than the pile head outer periphery size of the steel pipe pile is used, even if the steel pipe pile is misaligned in the horizontal direction, It does not hinder the bolt hole of the pile head base plate and the bolt hole of the column side base plate to be aligned, so that a through hole should be formed in the pile head base plate in advance regardless of the horizontal misalignment of the steel pipe pile. Therefore, after the steel pipe pile is driven into the ground at the site, a sub-plate is attached to the pile head of the steel pipe pile, and the pile head base plate is adjusted so that the bolt hole of the pile head base plate and the bolt hole of the column side base plate match. If it is stacked on the sub-plate, the horizontal misalignment of the steel pipe pile will be absorbed, and the time from hitting the steel pipe pile to attaching the pile head base plate to the pile It can be significantly reduced.

In addition, in the steel pipe pile and the bolt connection structure of the column where the pile head base plate on the steel pipe pile side and the base plate on the column side are jointed with bolts, the pile head base plate is attached to the steel pipe pile,
A subplate having a through hole of a size that fits the outer periphery of the pile head of the steel pipe pile;
A pile head base plate having a through hole of a size larger than the pile head outer periphery size of the steel pipe pile;
Using the subplate receiver,
After driving the steel pipe pile into the ground,
Pass the sub-plate through the through hole so that the pile head of the steel pipe pile protrudes upward from the sub-plate, and receive the lower surface side of the sub-plate on the receiver of the outer periphery of the pile head,
The pile head base plate is overlaid on the upper surface of the subplate so that the pile head extra length protrudes from the through hole, and the periphery of the through hole of the pile head base plate is welded to the upper surface of the sub plate.
The pile head base plate and the sub plate are turned upside down, the outer periphery of the sub plate is welded to the upper surface of the pile head base plate,
Pile head base plate and sub plate are further turned upside down, the sub plate is received by the receiver, and the periphery of the through hole of the sub plate is welded to the outer periphery of the pile head on the upper surface side of the sub plate. It is good also as the attachment method of the pile head base plate to the.

  In this case, furthermore, the welding of the sub-plate and the base plate and the welding of the steel pipe pile and the sub-plate can all be easily performed downward, and the sub-plate and the pile head base plate are welded from both the front and back sides. Can be joined firmly.

  According to the present invention, the time from hitting a steel pipe pile to attaching the pile head base plate to the pile can be greatly shortened.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  In the first embodiment shown in FIGS. 1 to 3, 1 is a steel pipe pile, 2 is a column, the steel pipe pile 1 is a circular steel pipe, the column is a square steel pipe, and the steel pipe pile 1 and the column 2 are steel pipes. A plan view rectangular pile head base plate 3 provided on the pile 1 side and a plan view square column side base plate 4 provided on the column side are joined and connected by bolts. In this embodiment, the column base plate 4 is attached to the lower end of the column 2 by welding.

  In the above bolt connection structure, the pile head base plate 3 is attached to the pile head of the steel pipe pile 1 with the following structure.

  That is, 6 is a subplate, and the subplate 6 has a circular through hole 6a of a size that fits the outer periphery of the pile head of the steel pipe pile 1, and the pile head of the steel pipe pile 1 is inserted into the through hole 6a. 6, the through hole surrounding portion is welded to the outer periphery of the pile head 1 of the steel pipe pile 1 on the upper surface side of the sub-plate 6 over the entire circumference (first welding portion W1).

  The pile head base plate 3 is provided with a circular through hole 3a having a size larger than the pile head outer periphery size of the steel pipe pile 1, and the pile head base plate 3 is connected to the bolt holes 3b. A pile head surplus length portion is projected on the through hole 3a so as to coincide with the hole 4b, and is superimposed on the subplate 6, and the periphery of the through hole is welded to the upper surface portion of the subplate 6 over the entire circumference (first). 2, the pile head base plate 3 is attached to the steel pipe pile 1 via the sub-plate 6.

  Furthermore, in this embodiment, the receiving part 7 which receives the subplate 6 from the lower part is provided in the pile head outer peripheral part of the steel pipe pile 1, and the subplate 6 is received by this receiving part 7, and the outer peripheral part is a perimeter. The pile head base plate 3 is welded (third welded portion W3) to the lower surface portion of the pile head base plate 3, and the pile head base plate 3 and the sub plate 6 are joined by both the second welded portion W2 and the third welded portion W3.

  In this embodiment, the outer peripheral shape of the sub-plate 6 is an oval shape in which the ends of the pair of semicircles 8 and 8 are connected by straight lines 9 and 9, and the circular passage of the sub-plate 6 is also performed. The hole 6a is provided eccentrically so as to be concentric with any one of the outer peripheral semicircular portions 8. Further, the through hole 3a of the pile head base plate 3 has a diameter of the outer peripheral semicircular portions 8, 8 of the sub-plate 6. It consists of a circular hole with a smaller diameter. In addition, the length dimension of the straight lines 9 and 9 is designed assuming the maximum misalignment dimension of the steel pipe pile 1.

  In the above mounting structure, when the steel pipe pile 1 is driven into the ground without horizontal misalignment, the sub-plate 6 is installed on the outer periphery of the pile head of the steel pipe pile 1 as shown in FIG. The pile head base plate 3 is arranged so that the bolt holes 3b thereof coincide with the bolt holes 4b of the column side base plate 4, that is, the through holes 3a of the pile head base plate 3 are concentric with the through holes 6a of the sub-plate 6. What is necessary is just to arrange | position on the subplate 6 so that it may become. In that case, the sub-plate 6 may be oriented in any direction in the horizontal direction.

  On the other hand, when the steel pipe pile 1 is displaced in the horizontal direction and driven into the ground, the following is performed. That is, as shown in FIG. 4 (a), when the steel pipe pile 1 is driven into the column 2 with a misalignment on the right side of the drawing, the sub-plate 6 is placed on the outer periphery of the pile head of the steel pipe pile 1. It is installed so as to face the left side of the drawing, which is the anti-centering direction, that is, to protrude to the left side of the drawing, which is the anti-centering direction. Then, the pile head base plate 3 is arranged on the sub-plate 6 so as to be eccentric to the left side in the anti-centering direction so that the bolt holes 3b coincide with the bolt holes 4b of the column side base plate 4. Thereby, even if the steel pipe pile 1 is driven into the ground with such a misalignment, the pile head base plate 3 is attached by absorbing the misalignment of the steel pipe pile 1 so as to coincide with the base plate 4 on the column side.

  In addition, as shown in FIG. 4 (b), when the steel pipe pile 1 has been driven into the column with a misalignment on the diagonal upper right side of the drawing, the sub-plate 6 is attached to the outer periphery of the pile head of the steel pipe pile 1. It is installed so that it faces the diagonally lower left side of the drawing, which is the anti-centering direction. Then, the pile head base plate 3 is arranged on the sub-plate 6 so as to be eccentric to the lower left side of the drawing in the anti-centering direction so that the bolt holes 3b coincide with the bolt holes 4b of the column side base plate 4. To do. Thereby, even if the steel pipe pile 1 is driven into the ground with such a misalignment, the pile head base plate 3 is attached by absorbing the misalignment of the steel pipe pile 1 so as to coincide with the base plate 4 on the column side.

  Thus, in the above structure, the pile head base plate 3 is provided with the through holes 3a having a size larger than the pile head outer peripheral size of the steel pipe pile 1, so that even if the steel pipe pile 1 is misaligned in the horizontal direction, The through holes 3a do not hinder the bolt holes 3b of the pile head base plate 3 and the bolt holes 4b of the column side base plate 4 from being aligned with each other. Irrespectively, the through hole 3a can be processed in the pile head base plate 3 in advance. Therefore, after the steel pipe pile 1 is driven into the ground at the site, the sub-plate 6 is attached to the pile head of the steel pipe pile 1, and the pile head base plate 3 is stacked on the sub-plate 6, so that the horizontal core of the steel pipe pile 1 is obtained. The displacement is absorbed, and the time from hitting the steel pipe pile 1 to attaching the pile head base plate 3 to the pile 1 can be greatly shortened.

  Further, in the present embodiment, the outer peripheral shape of the sub-plate 6 has an oval shape in which the ends of the pair of semicircles 8 and 8 are connected by the straight portions 9 and 9, and is exposed to the sub-plate 6. The through hole 6a is a circular hole and is eccentrically provided so as to be concentric with any one of the outer peripheral semicircular portions 8. The through hole 3a of the pile head base plate 3 has a diameter of the outer peripheral semicircle 8 of the sub plate 6. Since it is composed of a circular hole with a smaller diameter, the sub-plate 6 is directed in the anti-center misalignment direction at the outer periphery of the steel pipe pile 1 with respect to the horizontal misalignment of the steel pipe pile 1, and the pile head base plate 3 is placed thereon. By making it pile, the core shift | offset | difference in the horizontal direction of the steel pipe pile 1 can be absorbed with the subplate 6 of small plane size. Moreover, since the periphery of the through hole 3a of the pile head base plate 3 can be positioned on the upper surface of the sub plate 6 over the entire circumference in a state where the pile head base plate 3 is superimposed on the sub plate 6, the pile head base plate 3 The entire circumference of the periphery of the through hole 3 a can be welded to the upper surface of the sub-plate 6.

  In the above mounting structure, the through hole 3a of the pile head base plate 3 is filled with a filler 10 such as a non-shrink mortar, and the size of the through hole 3a of the pile head base plate 3 is larger than the outer peripheral size of the steel pipe pile 1. In particular, a wide area on the bending compression side is secured by the filler 10, and a connection structure strong against bending can be realized. Reference numeral 11 denotes an inner diaphragm.

  The pile head base plate 3 can be attached to the steel pipe pile 1 as follows. That is, after driving the steel pipe pile 1 into the ground and cutting the pile head at a predetermined height position, the predetermined height position of the outer periphery of the pile head of the steel pipe pile 1 is shown in FIGS. The sub-plate 6 is passed through the through-hole 6a so that the pile head of the steel pipe pile 1 protrudes upward from the sub-plate 6, and the sub-plate 6 is attached to the receiver 7 on the outer periphery of the pile head. 6 receives the lower surface side. Next, the pile head base plate 3 is overlaid on the upper surface of the sub-plate 6 so that the pile head surplus portion protrudes into the through hole 3a, and as shown in FIG. The portion is welded to the upper surface portion of the sub-plate 6 (second welded portion W2). Next, as shown in FIG. 6 (e), the pile head base plate 3 and the sub-plate 6 are removed from the steel pipe pile 1 and turned upside down, and temporarily placed on the steel pipe pile 1, for example, as shown in FIG. As shown in FIG. 2, the outer peripheral portion of the sub-plate 6 is welded to the upper surface portion of the pile head base plate 3 (third welded portion W3). Next, as shown in FIG. 6 (g), the pile head base plate 3 and the sub plate 6 are removed from the steel pipe pile 1 again, and further turned upside down, and the sub plate 6 is received by the receiver 7, and the through hole of the sub plate 6 is provided. The peripheral portion is welded to the outer periphery of the pile head on the upper surface side of the sub-plate 6 (first welded portion W1).

  As described above, according to the above attachment method, the welding W2 and W3 between the sub-plate 6 and the pile head base plate 3 and the welding W1 between the steel pipe pile 1 and the sub-plate 6 can all be easily performed downward, The sub-plate 6 and the pile head base plate 3 are welded from both the front and back sides so that they can be firmly joined.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above-described embodiment, an oblong outer peripheral shape is used as the subplate, and the subplate is installed in the direction opposite to the misalignment of the steel pipe pile to absorb the misalignment of the steel pipe pile. The sub-plate has a circular outer periphery, and a through hole is formed in the center of the sub plate, and a structure that absorbs the misalignment of the steel pipe pile by receiving the pile head base plate in the region between the peripheral portion of the through hole and the outer peripheral portion. Good.

  Moreover, although the case where each part was joined by all-around welding was shown in said embodiment, you may make it join by welding in the circumferential direction at intervals. Furthermore, when the steel pipe pile is driven with a misalignment, a part in the circumferential direction of the through hole of the pile head base plate may protrude outward from the outer periphery of the sub plate.

It is a disassembled perspective view which shows the structure of embodiment. FIG. 1A is a plan view of the same, and FIG. Fig. (A) is a plan view of a steel pipe pile, Fig. (B) is a plan view of a sub-plate, and Fig. (C) is a plan view of a pile head base plate. FIGS. (A) and (B) are plan views showing the attachment state of the sub-plate and the pile head base plate when the steel pipe pile is driven out of alignment. Drawing (a)-figure (d) are sectional side views which show the attachment method of a pile head base plate one by one with Drawing 6 (e)-(h). Drawing (e)-figure (H) are sectional side views which show the attachment method of a pile head base plate one by one with Drawing 5 (i)-(d).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Steel pipe pile 2 ... Pillar 3 ... Pile head base plate 3a ... Through hole 3b ... Bolt hole 4 ... Column side base plate 4b ... Bolt hole 6 ... Subplate 6a ... Through hole 7 ... Receiving 8 ... Semicircle 9 ... Straight line 10 ... Filling Material W1 ... 1st welding part W2 ... 2nd welding part W3 ... 3rd welding part

Claims (6)

A pile head base plate mounting structure to a steel pipe pile in a bolt connection structure of a steel pipe pile and a column in which a pile head base plate on a steel pipe pile side and a base plate on a column side are jointed with bolts,
A sub-plate having a through hole of a size that fits the outer periphery of the pile head of the steel pipe pile is passed through the through hole so that the pile head of the steel pipe pile protrudes upward from the sub plate, and the surrounding part of the through hole is the sub-plate. Welded to the outer periphery of the pile head of the steel pipe pile on the upper surface side of the plate,
The pile head base plate is provided with a through-hole of a size larger than the pile head outer periphery size of the steel pipe pile,
The pile head base plate is piled up on the sub plate with the pile head extra length projecting from the through hole so that the bolt hole is aligned with the bolt hole of the column side base plate, A structure for attaching a pile head base plate to a steel pipe pile, which is welded to the upper surface of the steel pipe. The outer peripheral shape of the sub-plate has an oval shape connecting the ends of a pair of semicircles,
The through-hole opened in the sub-plate is a circular hole and is provided eccentrically so as to be concentric with either one of the outer peripheral semicircular parts,
The mounting structure of the pile head base plate to the steel pipe pile according to claim 1, wherein the through hole of the pile head base plate is a circular hole having a diameter smaller than the diameter of the outer peripheral semicircular portion of the sub plate. On the outer periphery of the pile head, a receiver for receiving the sub-plate from below is provided.
The mounting structure of the pile head base plate to the steel pipe pile according to claim 1 or 2, wherein an outer peripheral portion of the sub plate is welded to a lower surface portion of the pile head base plate.   The mounting structure of the pile head base plate to the steel pipe pile according to any one of claims 1 to 3, wherein a filler such as non-shrink mortar is filled in the through hole of the pile head base plate. A method for attaching a pile head base plate to a steel pipe pile in a bolt connection structure of a steel pipe pile and a column in which a pile head base plate on a steel pipe pile side and a base plate on a column side are jointed with bolts,
A sub-plate that has a through hole of a size that fits the outer periphery of the pile head of the steel pipe pile, and is welded to the outer periphery of the pile head;
A pile head base plate that has a through-hole that is larger than the pile head outer periphery size of the steel pipe pile and is welded to the sub-plate,
After driving the steel pipe pile into the ground,
The sub plate is installed in the steel pipe pile through the through hole so that the pile head of the steel pipe pile protrudes upward from the sub plate,
The pile head base plate is placed on the upper surface of the sub-plate with the pile head extra length protruding from the through hole so that the bolt hole matches the bolt hole of the column side base plate. How to install the pile head base plate. A method for attaching a pile head base plate to a steel pipe pile in a bolt connection structure of a steel pipe pile and a column in which a pile head base plate on a steel pipe pile side and a base plate on a column side are jointed with bolts,
A subplate having a through hole of a size that fits the outer periphery of the pile head of the steel pipe pile;
A pile head base plate having a through hole of a size larger than the pile head outer periphery size of the steel pipe pile;
Using the subplate receiver,
After driving the steel pipe pile into the ground,
Pass the sub-plate through the through hole so that the pile head of the steel pipe pile protrudes upward from the sub-plate, and receive the lower surface side of the sub-plate on the receiver of the outer periphery of the pile head,
The pile head base plate is overlaid on the upper surface of the subplate so that the pile head extra length protrudes from the through hole, and the periphery of the through hole of the pile head base plate is welded to the upper surface of the sub plate.
The pile head base plate and the sub plate are turned upside down, the outer periphery of the sub plate is welded to the upper surface of the pile head base plate,
Pile head base plate and sub plate are further turned upside down, the sub plate is received by the receiver, and the periphery of the through hole of the sub plate is welded to the outer periphery of the pile head on the upper surface side of the sub plate. How to attach the pile head base plate to the head.

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