JP2019167738A - Connection structure of steel sheet pile, and steel sheet pile structure - Google Patents

Abstract

To provide a connection structure of steel sheet piles enlarging clearance between components on design, in connecting steel sheet piles with each other in a longer direction by engagement of ridges extending in a width direction of steel sheet piles.SOLUTION: A connection structure 20 for connecting first steel sheet pile 10A and second steel sheet pile 10B in a longer direction comprises: first connection member 21A attached to a side face of the first steel sheet pile 10A; second connection member 21B attached to a side face of the second steel sheet pile; an intermediate connection member 22 in which second ridge portion 222 engaging with first ridge portion 212 which is formed respectively in the first and second connection member and which extends in a width direction of the first and the second steel sheet pile is formed; and an insertion member 23B which can be inserted between stress transmission faces according to size of clearance between the stress transmission face of each of the first and the second ridge portion.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a steel sheet pile connection structure and a steel sheet pile structure including the connection structure.

  Steel sheet piles are widely used to construct steel sheet pile walls for earth retaining and water stopping in civil engineering construction work. For example, when there is a restriction on the height of the construction space with respect to the required steel sheet pile length, such as under a bridge girder, a plurality of steel sheet piles are connected in the longitudinal direction and placed on the ground. However, when joining steel sheet piles by on-site welding as in the past, the time required for the welding process is long, resulting in a problem that the entire construction period becomes long.

  Thus, in Patent Document 1 and the like, a technique for mechanically connecting steel sheet piles in the longitudinal direction has been proposed. Specifically, Patent Document 1 discloses a longitudinal connection structure of a hat-shaped steel sheet pile in which a first hat-shaped steel sheet pile and a second hat-shaped steel sheet pile are butted against each other at end faces in the axial direction. A first locked portion that protrudes outward from the side surface of the first hat-shaped steel sheet pile; a second locked portion that protrudes outward from the side surface of the second hat-shaped steel sheet pile; A longitudinal connection structure of a hat-shaped steel sheet pile is described, which includes a locking portion and a construction portion locked to each of the second locked portions.

International Publication No. 2017/038629

  In the technique described in Patent Document 1 described above, when the end faces of the steel sheet piles are abutted with each other, the distance between the locked portions that are joined in advance to the side surfaces of the steel sheet piles by welding or the like is determined. Since this distance varies depending on the finished state of the end face of the steel sheet pile, each locked portion and the erection portion for locking them are designed with a predetermined clearance. If this clearance can be further expanded, not only can the various finished states of the end face of the steel sheet pile be handled, but also the construction when locking the locked portion at the erection portion becomes easy.

  Therefore, the present invention is new and improved, which can increase the design clearance between members when connecting steel sheet piles in the longitudinal direction by engagement of ridges extending in the width direction of the steel sheet pile. It aims at providing the connection structure of a steel sheet pile, and the steel sheet pile structure containing a connection structure.

According to an aspect of the present invention, there is a connection structure for connecting the first steel sheet pile and the second steel sheet pile in the longitudinal direction, the first connection member attached to the side surface of the first steel sheet pile, A second connecting member attached to a side surface of the second steel sheet pile, and a first ridge formed on the first and second connecting members and extending in the width direction of the first and second steel sheet piles, respectively. Inserted between the stress transmission surfaces according to the size of the gap between the intermediate coupling member formed with the engaging second ridges and the stress transmission surfaces of the first and second ridges. A steel sheet pile connection structure comprising a possible insertion member is provided.
According to the above configuration, even when the designed clearance between the first and second coupling members and the intermediate coupling member is enlarged, the stress transmission surface is in accordance with the size of the gap between the stress transmission surfaces. Since the insertion member is inserted between the two, reliable transmission of stress through the insertion member becomes possible.

  In the steel sheet pile connection structure, the insertion member may have a rectangular cross section including sides facing each of the stress transmission surfaces. Alternatively, in the steel sheet pile connection structure described above, each of the stress transmission surfaces may be formed with a groove portion having an arcuate cross section, and the insertion member may have a circular cross section whose radius is equal to or less than the radius of curvature of the arcuate cross section. . In addition, the steel sheet pile connection structure may further include a locking member attached to the insertion member and abutted against the first and second connection members and the side surfaces of the intermediate connection member.

  Moreover, according to another viewpoint of this invention, the steel sheet pile structure containing the connection structure of one of said steel sheet piles is provided.

It is a perspective view which shows a part of steel sheet pile wall containing the connection structure which concerns on the 1st Embodiment of this invention. It is the II-II line expanded sectional view of FIG. In the example of FIG. 2, it is a figure which shows the case where a clearance gap has arisen between the end surfaces of a steel sheet pile. In the example of FIG. 2, it is a figure which shows the case where a clearance gap further arises between the end surfaces of a steel sheet pile. It is sectional drawing which shows the other example of the connection structure which concerns on the 1st Embodiment of this invention. It is a figure which shows the process of inserting an insertion member in the example of FIG. It is a figure which shows the example which attached the slip prevention member to the insertion member in the example of FIG. It is sectional drawing of the connection structure which concerns on the 2nd Embodiment of this invention. It is sectional drawing of the connection structure which concerns on the 2nd Embodiment of this invention. It is a figure which shows the example which attached the locking member to the insertion member in the 2nd Embodiment of this invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present specification and drawings, components having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted.

(First embodiment)
FIG. 1 is a perspective view showing a part of a steel sheet pile wall including a connection structure according to the first embodiment of the present invention. As shown in FIG. 1, a steel sheet pile wall 1 which is an example of a steel sheet pile structure joins a plurality of hat-shaped steel sheet piles 10 in the longitudinal direction (z direction in the drawing) by abutting the end faces. At the same time, the joints formed on both sides are joined together in the width direction (x direction in the figure). Each steel sheet pile 10 includes a flange 12, a web 13 and an arm 14. In the following description, the surface of the steel sheet pile 10 constituting each part, specifically, the surface facing the wall thickness direction (y direction in the drawing) of the steel sheet pile wall 1 in the flange 12 and the arm 14 is referred to as a steel sheet pile. Also referred to as 10 side surfaces. Similarly, the surface facing the longitudinal direction of the steel sheet pile 10 is also referred to as the end surface of the steel sheet pile 10. In the present embodiment, the steel sheet piles 10 are connected in the longitudinal direction using the connecting structure 20. The connection structure 20 includes a connection member 21 that is attached to the side surface of the flange 12 at each longitudinal end of the steel sheet pile 10 to be connected, an intermediate connection member 22 that engages the connection members 21 with each other, and an insertion member that will be described later. Including. The intermediate connecting member 22 can be fitted to the connecting member 21 by sliding in the width direction of the steel sheet pile 10 as shown in FIG.

  2 is an enlarged sectional view taken along line II-II in FIG. In the example shown in FIG. 2, the connection structure 20 includes a connection member 21A (first connection member) attached to the side surface of the flange 12 at the end of the steel sheet pile 10A (first steel sheet pile), and a steel sheet pile 10B. The connecting member 21B (second connecting member) attached to the side surface of the flange 12 at the end of the (second steel sheet pile), the intermediate connecting member 22 engaged with each of the connecting members 21A and 21B, and the inserting member 23A Including. Each of the connecting members 21A and 21B protrudes from the main body 211 and the main body 211 that are joined to the side surface of the flange 12 by welding or the like, and extends in the width direction (x direction in the drawing) of the steel sheet piles 10A and 10B. Part 212 (first ridge). On the other hand, the intermediate connecting member 22 includes a main body 221 and a ridge 222 (second ridge) protruding from the main body 221. Such connecting members 21A, 21B and intermediate connecting member 22 are formed by, for example, hot extrusion, cutting, cutting or rolling of steel materials, casting, or the like.

  Here, the ridges 222 of the intermediate coupling member 22 are engaged with the ridges 212 of the coupling members 21A and 21B. In other words, the ridges 222 of the intermediate connection member 22 are fitted between the ridges 212 of the connection members 21A and 21B. Alternatively, the ridges 212 of the connecting members 21 </ b> A and 21 </ b> B are fitted between the ridges 222 of the intermediate connecting member 22. In a state where the connecting structure 20 connects the steel sheet piles 10A and 10B, the ridges 212 of the connecting members 21A and 21B and the ridges 222 of the intermediate connecting member 22 both extend in the width direction of the steel sheet piles 10A and 10B. The intermediate connecting member 22 can be fitted to the connecting members 21 </ b> A and 21 </ b> B by sliding in the width direction of the steel sheet pile 10.

The insertion member 23 </ b> A is a bar-shaped member having a rectangular cross section that is inserted into a gap between the ridge 212 of the coupling members 21 </ b> A and 21 </ b> B and the ridge 222 of the intermediate coupling member 22. In the state where the end faces 15A and 15B in the longitudinal direction of the steel sheet piles 10A and 10B are abutted with no gap as in the illustrated example, the connecting members 21A and 21B have a designed clearance on the side opposite to the end faces 15A and 15B. It is attached to the steel sheet piles 10A and 10B so that the corresponding gap _C0 is generated. In this case, a gap is generated between the stress transmission surface 212A of the ridge 212 of the coupling members 21A and 21B and the stress transmission surface 222A of the ridge 222 of the intermediate coupling member 22, but in this embodiment, After the intermediate connecting member 22 is fitted to the connecting members 21A and 21B, the insertion member 23A is inserted into the gap. Since the rectangular cross section of the insertion member 23A includes sides facing the stress transmission surfaces 212A and 222A, when the insertion member 23A comes into contact with both the stress transmission surfaces 212A and 222A, a reliable stress can be obtained via the insertion member 23A. Communication is possible.

FIG. 3 is a diagram illustrating a case where a gap is generated between the end faces of the steel sheet piles in the example of FIG. 2. For example, steel sheet pile 10A, the end surface 15A of the 10B, depending on the state of the finish 15B, in the portion where the connection structure 20 is disposed, there is a case where the gap _{G 1} is created between the end faces 15A, 15B. In this case, the steel sheet pile 10A, the connecting member 21A which is attached respectively to 10B, also the distance between 21B, becomes far only minute gap _{G 1,} the gap end face 15A, and 15B occurs on the opposite side _C 1 (C ₁ <C ₀ ). In this case, the insertion member 23B is inserted into the gap between the ridges 212 of the connecting members 21A and 21B and the ridges 222 of the intermediate connecting member 22. The insertion member 23B is a rod-shaped member having a rectangular cross section like the insertion member 23A, but the thickness is smaller than that of the insertion member 23A. As described above, even if the size of the gap changes by using the insertion member 23B having a size corresponding to the size of the gap between the connecting members 21A and 21B and the intermediate connecting member 22, the example of FIG. Similarly, reliable transmission of stress through the insertion member 23B becomes possible.

FIG. 4 is a diagram illustrating a case where a gap is further generated between the end faces of the steel sheet piles in the example of FIG. 2. In the illustrated example, the maximum allowable gap G ₂ (G ₂ > G ₁ ) is generated between the end faces 15A, 15B of the steel sheet piles 10A, 10B. In this case, the distance between the connecting members 21A and 21B attached to the steel sheet piles 10A and 10B is further increased, and the gap between the connecting members 21A and 21B and the intermediate connecting member 22 is substantially zero. When this gap is 0, the stress transmission surface 212A of the ridge 212 of the coupling members 21A and 21B and the stress transmission surface 222A of the ridge 222 of the intermediate coupling member 22 are in contact with each other with no gap between them. Therefore, it is not necessary to insert the insertion member 23A.

  As described above, in the first embodiment, the connection structure 20 is formed between the stress transmission surface 212A of the ridge 212 of the connection members 21A and 21B and the stress transmission surface 222A of the ridge 222 of the intermediate connection member 22. As insertion members that can be inserted in accordance with the size of the gaps, insertion members 23A and 23B having a rectangular cross section are included. Thus, even when the designed clearance between the connecting members 21A and 21B and the intermediate connecting member 22 is increased, the size of the gap generated between the connecting members 21A and 21B and the intermediate connecting member 22 is increased. Accordingly, the stress can be reliably transmitted by inserting the insertion members 23A and 23B and contacting the stress transmission surfaces 212A and 222A indirectly or directly. Note that the insertion members 23A and 23B do not necessarily have to be in contact with the stress transmission surfaces 212A and 222A when they are inserted. For example, the insertion members 23A and 23B may be in contact with each other when tensile stress is applied to the steel sheet piles 10A and 10B. In the above example, two types of insertion members 23A and 23B are prepared. However, one type or three or more types of insertion members may be prepared according to the range of gaps that may occur.

  In the present specification, the fact that the insertion member can be inserted according to the size of the gap means that the insertion member having different dimensions according to the size of the gap, as in the example shown in FIGS. 2 and 3 above. It means that the member is selectively inserted. Also, whether the insertion member can be inserted according to the size of the gap determines whether or not the insertion member is inserted according to the size of the gap, as in the example shown in FIG. In that meaning. Therefore, in a state where the steel sheet piles are connected to each other, the connection structure does not necessarily include the insertion member that is actually inserted. Specifically, in the case of the example shown in FIG. 4, the insertion members 23A and 23B are prepared as components of the connection structure 20, but are inserted in the connection structure 20 when the steel sheet piles 10A and 10B are connected. The members 23A and 23B are not inserted.

Further, for the sake of simplicity, the case where the intermediate connecting member 22 is disposed at a neutral position between the connecting members 21A and 21B so as to generate an equal gap on each side of the connecting members 21A and 21B has been described. However, it is also possible to arrange the intermediate connecting member 22 so as to be shifted to either one of the connecting members 21A and 21B. For example, when biasing the intermediate connecting member 22 on the side of the connecting member 21A in the example shown in FIG. 3, one connecting member 21A of the stress transfer surface in the side 212A, is twice the gap C ₁ between 222A generated Thus, no gap is generated between the stress transmission surfaces 212A and 222A on the connecting member 21B side. In this case, it is only necessary to insert an insertion member twice as thick as the insertion member 23B between the stress transmission surfaces 212A and 222A only on the connecting member 21A side.

  FIG. 5 is a sectional view showing another example of the connection structure according to the first embodiment of the present invention. In the example shown in FIGS. 2 to 4, the stress transmission surface 212A of the ridge portion 212 of the connecting members 21A and 21B and the stress transmission surface 222A of the ridge portion 222 of the intermediate connecting member 22 are both steel sheet piles 10A, In contrast to the inclination of 10B in the longitudinal direction (z direction in the figure), in the example shown in FIG. 5, the stress transmission surfaces 212A and 222A are both in the longitudinal direction of the steel sheet piles 10A and 10B. Almost vertical. Also in this case, the insertion member 23 is inserted into the gap between the ridges 212 of the coupling members 21A and 21B and the ridges 222 of the intermediate coupling member 22 as in the above example. As described above, the cross-sectional shapes of the connecting members 21A and 21B and the intermediate connecting member 22 can be variously configured including, for example, an example described in International Publication No. 2017/038629.

  FIG. 6 is a diagram illustrating a process of inserting the insertion member in the example of FIG. In a state where the connecting structure 20 connects the steel sheet piles 10A and 10B, the ridges 212 of the connecting members 21A and 21B and the ridges 222 of the intermediate connecting member 22 are both in the width direction of the steel sheet piles 10A and 10B (in the drawing). Therefore, the insertion member 23 is also inserted in the width direction of the steel sheet piles 10A and 10B.

  FIG. 7 is a view showing an example in which a detachment prevention member is attached to the insertion member in the example of FIG. As described above, since the insertion member 23 is not necessarily in contact with the stress transmission surfaces 212A and 222A when inserted, the insertion member 23 may slide in the width direction of the steel sheet piles 10A and 10B and fall off. In the illustrated example, the locking members 231 and 232 are attached to both sides of the insertion member 23, respectively. For example, the insertion member 23 is inserted into the gap between the coupling members 21 </ b> A and 21 </ b> B and the intermediate coupling member 22 in a state where the one locking member 231 is attached to the insertion member 23 in advance. At this time, the detachment preventing member 231 is brought into contact with the side surfaces of the coupling members 21A and 21B and the intermediate coupling member 22, whereby the insertion member 23 can be easily inserted to an appropriate insertion depth. After that, by attaching the anti-separation member 232 on the opposite side, the insertion member 23 is prevented from falling off on either side in the width direction of the steel sheet piles 10A and 10B.

(Second Embodiment)
8 and 9 are cross-sectional views of the connection structure according to the second embodiment of the present invention. In this embodiment, the connection structure 40 used to connect the steel sheet piles 10A and 10B in the longitudinal direction includes the connection member 41A attached to the side surface of the flange 12 at the end of the steel sheet pile 10A, and the end of the steel sheet pile 10B. The connection member 41B attached to the side surface of the flange 12, the intermediate connection member 42 engaged with each of the connection members 41A and 41B, and the insertion members 43A and 43B are included. In addition, since this embodiment is the same as that of said 1st Embodiment except the structure of the connection structure 40 shown in figure, the overlapping description is abbreviate | omitted.

In the illustrated example, the ridges 212 of the connecting members 41A and 41B and the ridges 222 of the intermediate connecting member 42 have the same cross-sectional shape as in the example shown in FIG. Furthermore, in the present embodiment, grooves 213 and 223 having arcuate cross sections are formed on the stress transmission surface 212A of the ridge 212 and the stress transmission surface 222A of the ridge 222, respectively. In the example shown in FIG. 8, the connecting member 41A, 41B and a gap between the intermediate connecting member 42 is _{C 0,} they are fitted is inserted member 43A into the groove 213 and 223. In the example shown in FIG. 9, the gap between the connecting members 41 </ b> A and 41 </ b> B and the intermediate connecting member 42 is C ₁ (C ₁ <C ₀ ), and the insertion member 43 </ b> B is fitted in the grooves 213 and 223. Yes.

The insertion members 43A and 43B are rod-shaped members having a circular cross section, and the diameter of the insertion member 43A is larger than the diameter of the insertion member 43B. 8 and 9, the radius of curvature of the cross section of the groove portions 213 and 223 corresponds to the radius of the insertion member 43A inserted when the gap is maximum (C ₀ ). Therefore, in the example shown in FIG. 8, the insertion member 43A and the grooves 213 and 223 are in surface contact. On the other hand, in the example shown in FIG. 9, since the radius of the insertion member 43B is smaller than the radius of curvature of the cross section of the groove portions 213 and 223, the insertion member 43B and the groove portions 213 and 223 are in line contact. Stress transmission is possible even with such line contact. That is, in this embodiment, the radius of the circular cross section which insertion member 43A, 43B has is below the curvature radius of groove part 213,223 formed in stress transmission surface 212A, 222A.

  Thus, in 2nd Embodiment, the connection structure 40 contains insertion member 43A, 43B of circular cross section as an insertion member which can be inserted according to the magnitude | size of the clearance gap between stress transmission surfaces. As a result, similarly to the first embodiment, the insertion members 43A and 43B are inserted in accordance with the size of the gap generated between the connection members 41A and 41B and the intermediate connection member 42, and the stress transmission surface 212A. , 222A indirectly or directly, stress can be reliably transmitted. Note that the insertion members 43A and 43B do not necessarily have to be in contact with the stress transmission surfaces 212A and 222A when they are inserted. For example, the insertion members 43A and 43B may be in contact with each other when tensile stress is applied to the steel sheet piles 10A and 10B. In the above example, two types of insertion members 43A and 43B are prepared. However, one type or three or more types of insertion members may be prepared according to the range of gaps that may occur. Also in this embodiment, examples of the cross-sectional shapes of the ridges 212 of the connecting members 41A and 41B and the ridges 222 of the intermediate connecting member 42 are described in, for example, International Publication No. 2017/038629. Various configurations are possible, including

  Also in the present embodiment, as shown in FIG. 10, the stopper members 431 and 432 can be attached to the insertion member 43. Since the insertion member 43 is a rod-shaped member having a circular cross section, for example, a thread groove may be processed at an end portion, and the locking members 431 and 432 may be fixed by nuts 433 screwed into the thread groove. Alternatively, the nut 433 itself may be used as a stopper member. In addition, a separate locking member may be made unnecessary by processing thread grooves in both the insertion member 43 and the groove portions 213 and 223 and screwing the insertion member 43 into the groove portions 213 and 223.

  Since the insertion member 43 (insertion members 43A and 43B) in the present embodiment has a circular cross section, it is easy to manufacture using a ready-made material such as a steel bar, and the processing of the thread groove as described above. This is advantageous over the insertion members 23A and 23B of the first embodiment in that it is possible. On the other hand, the insertion members 23A and 23B having a rectangular cross section as in the first embodiment are advantageous in that they can stably come into surface contact with the stress transmission surfaces 212A and 222A regardless of the size of the gap.

  In addition to the embodiments described above, various embodiments are possible in the present invention. For example, in the second embodiment, a groove portion having an arcuate cross section is formed on each of the stress transmission surfaces of the ridge portions of the connecting member and the intermediate connecting member, and the insertion member having a circular cross section corresponding to the shape of the groove portion is provided. Although inserted, other similar configurations are possible when the groove has a cross-sectional shape such as a semicircular shape, a U shape, or a V shape. For example, when the groove portion has a semicircular or U-shaped cross-sectional shape, the insertion member has a circular or oval cross-sectional shape corresponding to the cross-sectional shape of the groove portion. Further, for example, when the groove portion has a V-shaped cross-sectional shape, the insertion member has a rectangular or hexagonal cross-sectional shape corresponding to the cross-sectional shape of the groove portion, and both sides are formed in a V-shape.

  Further, for example, in the above example, the insertion member is a rod-like member that penetrates the gap between the coupling member and the intermediate coupling member in the width direction of the steel sheet pile, but the insertion member is from both sides in the width direction of the steel sheet pile. It may be a wedge-shaped member inserted into the gap. In this case, the stress is transmitted by line contact between the stress transmission surface of the ridge and the insertion member at both ends in the width direction. As an advantage of the wedge-shaped member, it is possible to cope with various gap sizes by changing the insertion depth, so there are fewer types of insertion members to be prepared for the range of gaps that may occur. In addition, regardless of the size of the gap, there is a point that the stress transmission surface can be brought into contact with the insertion member when it is inserted.

  Further, in the above example, the case where the connection structure is formed on the flange of the steel sheet pile has been described. However, the connection structure may be formed on other parts of the steel sheet pile such as a web or an arm, for example, both the flange and the arm. It is also possible to form a connecting structure.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various variations and modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Steel sheet pile wall, 10 ... Steel sheet pile, 12 ... Flange, 13 ... Web, 14 ... Arm, 20, 40 ... Connection structure, 21, 21A, 21B, 41A, 41B ... Connection member, 212 ... Ridge part, 212A ... stress transmission surface, 22, 42 ... intermediate coupling member, 222 ... ridge, 222A ... stress transmission surface, 23, 43 ... insertion member, 231, 232, 431, 432 ... anti-detachment member, 433 ... nut.

Claims (7)

A steel sheet pile connection structure for connecting the first and second steel sheet piles in the longitudinal direction,
A first connecting member attached to a side surface of the first steel sheet pile;
A second connecting member attached to a side surface of the second steel sheet pile;
Intermediate connection member formed with second ridges formed on the first and second connection members, respectively, and engaged with first ridges extending in the width direction of the first and second steel sheet piles. When,
A steel sheet pile connection structure comprising: an insertion member that can be inserted between the stress transmission surfaces according to the size of the gap between the stress transmission surfaces of the first and second ridges.   The steel sheet pile connection structure according to claim 1, wherein the insertion member has a rectangular cross section including a side facing each of the stress transmission surfaces. A groove is formed in each of the stress transmission surfaces,
The steel sheet pile connection structure according to claim 1, wherein the insertion member has a cross-sectional shape corresponding to the groove. The groove has an arcuate cross section;
The said insertion member is a connection structure of the steel sheet piles of Claim 3 which has a circular cross section whose radius is below the curvature radius of the said arcuate cross section.   5. The anti-slip member according to claim 1, further comprising a locking member attached to the insertion member and abutted against a side surface of the first and second coupling members and the intermediate coupling member. Steel sheet pile connection structure.   2. The steel sheet pile connection structure according to claim 1, wherein the insertion member is a wedge-shaped member that is inserted into a gap between the stress transmission surfaces from both sides in the width direction of the first and second steel sheet piles.   The steel sheet pile structure containing the connection structure of the steel sheet pile of any one of Claims 1-6.

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