JP2018104928A - Manhole renovation structure and construction method of manhole renovation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an earthquake performance in a manhole renovation structure.SOLUTION: A manhole renovation structure 20 comprises a regenerative material 21 regenerating a manhole 10 communicated with an existing pipe 11, a fitting 22 provided to the regenerative material 21, and a new pipe 23 arranged in the existing pipe 11 and fitted to the fitting 22.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a manhole rehabilitation structure for rehabilitating a manhole used in, for example, a sewage pipe, an agricultural waterway, and the like, and a construction method thereof.

  2. Description of the Related Art Conventionally, there has been known a human hole described in, for example, Patent Document 1 below, which communicates with an existing pipe. This type of manhole uses rehabilitated materials to rehabilitate strength (strength) and seismic performance when aging or corroding.

JP2015-74965A

  However, in the human hole rehabilitation structure using the conventional rehabilitation material, there is room for improvement in the seismic performance at the portion where the rehabilitation material and the existing pipe are connected.

  This invention is made | formed in view of the situation mentioned above, Comprising: It aims at improving the seismic performance in a human-hole renovation structure.

In order to solve the above problems, the present invention proposes the following means.
The human hole rehabilitation structure according to the present invention includes a rehabilitation material for rehabilitating a human hole with which an existing pipe communicates, a joint provided in the rehabilitation material, a new pipe disposed in the existing pipe and fitted to the joint. And comprising.

In this case, a new pipe is fitted into the joint. Therefore, for example, when an earthquake occurs, it is possible to restrict relative displacement of the joint and the new pipe along the radial direction of the joint. Thereby, for example, it can be suppressed that the new pipe is detached from the rehabilitation material.
On the other hand, since the new pipe is simply fitted to the joint, for example, when ground deformation such as subsidence due to liquefaction occurs, the fitting form between the joint and the new pipe is changed according to the ground deformation. Can be easily followed. That is, for example, in a state where the joint and the new pipe are fitted to each other, the fitting portion between the joint and the new pipe can be bent, or the fitting portion between the joint and the new pipe can be expanded and contracted.
From the above, the seismic performance in the human-hole rehabilitation structure can be improved.

Here, a joint is provided on the rehabilitated material. Therefore, before arranging the rehabilitation material in the human hole, it becomes possible to fix the joint to the rehabilitation material on the ground such as a factory, and the degree of fixation between the rehabilitation material and the joint can be accurately controlled. .
A new pipe is fitted into the joint. Therefore, for example, the degree of fitting between the joint and the new pipe can be managed with high accuracy by adjusting the dimensions of the joint and the new pipe.
As described above, both the degree of fixation between the rehabilitated material and the joint and the degree of fitting between the joint and the new pipe can be managed with high accuracy. Thereby, the seismic performance between the rehabilitated material and the new pipe can be managed with high accuracy. Therefore, for example, the seismic performance between the rehabilitated material and the new pipe can be easily designed so as to satisfy the predetermined seismic performance. As a result, for this seismic performance, for example, standards that have been publicly established for the connection between manholes and pipes (for example, "Guidelines and explanations for seismic facilities for sewerage facilities-2014 edition-(Japan Sewerage Association) The reliability of the seismic performance between the rehabilitated material and the new pipe can be ensured by using a fiber reinforced resin pipe (hereinafter referred to as “FRPM pipe”). By adopting the same structure as the joint (receiving port) in the field of JIS (for example, the field of reinforced plastic composite pipes defined in JIS A 5350: 2006), the technical idea about the seismic performance confirmed in the field Can also be incorporated into the rehabilitation structure.
Furthermore, by accurately managing both the degree of fixation between the rehabilitation material and the joint and the degree of fitting between the joint and the new pipe, for example, the strength against the stress generated by the horizontal earth pressure due to the vertical earth pressure, etc. It can be managed with high accuracy. Thereby, it becomes possible to ensure the reliability of the strength as well as the above-mentioned seismic performance, and for example, it is possible to use the technical idea about the external pressure performance and the external water pressure performance in the field of the FRPM pipe.

  You may further provide the partition wall which is installed between the said existing pipe and the said new pipe, and connects the said existing pipe and the said new pipe.

  In this case, the new pipe is fitted into the joint, and the partition wall connects the existing pipe and the new pipe. Therefore, for example, a new pipe can be connected to a rehabilitated material or an existing pipe without using a so-called inner band whose long-term service life is not guaranteed. Further, for example, the new pipe can be connected to the rehabilitated material or the existing pipe without performing the FRP lamination bonding operation at the construction site. Here, FRP lamination adhesion may cause an unexpected influence on connection quality due to interface peeling. In addition, the FRP lamination bonding work at the construction site requires special skills, and therefore, variations in quality are likely to occur among workers. In addition, special skills are required in this way, and for example, when there is internal water or groundwater in existing pipes, the work period is affected by the construction environment, so the work period may be delayed. Therefore, in order to connect the new pipe and the rehabilitated material or the existing pipe, instead of performing the FRP lamination bonding work at the construction site, the members can be fitted with each other at the construction site, for example. In addition to implementing good quality control, the construction period can be stabilized.

  You may further provide the stopper provided in the said joint, and restrict | limiting that the said new pipe moves toward the rehabilitation material side along the axial direction of the said joint.

  In this case, the stopper restricts the new pipe from moving toward the reclaimed material side along the axial direction of the joint. Therefore, it is possible to prevent over-insertion when connecting a new pipe to the rehabilitated material, and for example, the stopper can be effectively used as an index for construction management.

  You may further provide the elastic seal arrange | positioned between the said coupling and the said new pipe.

  In this case, since the elastic seal is disposed between the joint and the new pipe, the water resistance can be effectively improved.

  You may further provide the backfilling material filled between the said human hole and the said rehabilitation material.

  In this case, since the backfilling material is filled between the manhole and the rehabilitation material, the earthquake resistance can be effectively improved.

  The method for constructing a manhole rehabilitation structure according to the present invention is a method for constructing a manhole rehabilitation structure for constructing the manhole rehabilitation structure, wherein the existing joint is formed on the joint of the rehabilitation material disposed in the manhole. The new pipe arranged in the pipe is fitted.

  In this case, since the new pipe arranged in the existing pipe is fitted to the joint of the rehabilitation material arranged in the human hole, the work can be simplified and the workability can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, the seismic performance in a manhole rehabilitation structure can be improved.

It is the top view in the manhole rehabilitation structure which concerns on one Embodiment of this invention, Comprising: It is the figure which looked at the joint and the new pipe from the top. It is the longitudinal cross-sectional view in the human-hole renovation structure shown in FIG. It is a top view of the principal part containing the rehabilitation material and joint in the human-hole renovation structure shown in FIG. It is a longitudinal cross-sectional view of the principal part containing the rehabilitation material and joint in the human-hole renovation structure shown in FIG. It is a longitudinal cross-sectional view explaining the effect | action of the elasticity and the flexibility of the fitting part of the joint in the human-hole renovation structure shown in FIG. It is a flowchart explaining the construction method of the human-hole renovation structure shown in FIG. It is a figure explaining the new pipe arrangement | positioning process in the construction method of the human-hole renovation structure shown in FIG. 6, Comprising: It is a figure equivalent to the top view shown in FIG. It is a figure explaining the new pipe arrangement | positioning process in the construction method of the human hole renovation structure shown in FIG. 6, Comprising: It is a figure corresponded to the longitudinal cross-sectional view shown in FIG. It is a figure explaining the rehabilitation material arrangement | positioning process in the construction method of the human hole renovation structure shown in FIG. 6, Comprising: It is a figure equivalent to the top view shown in FIG. It is a figure explaining the rehabilitation material arrangement | positioning process in the construction method of the human hole renovation structure shown in FIG. 6, Comprising: It is a figure corresponded to the longitudinal cross-sectional view shown in FIG. It is a figure explaining the fitting process in the construction method of the human-hole renovation structure shown in FIG. 6, Comprising: It is a figure equivalent to the top view shown in FIG. It is a figure explaining the fitting process in the construction method of the human-hole renovation structure shown in FIG. 6, Comprising: It is a figure corresponded to the longitudinal cross-sectional view shown in FIG. It is a figure explaining the installation process in the construction method of the human hole renovation structure shown in FIG. 6, Comprising: It is a figure equivalent to the top view shown in FIG. It is a figure explaining the installation process in the construction method of the human hole renovation structure shown in FIG. 6, Comprising: It is a figure corresponded to the longitudinal cross-sectional view shown in FIG.

  Hereinafter, with reference to FIG. 1 to FIG. 14, a manhole rehabilitation structure 20 and a construction method thereof according to an embodiment of the present invention will be described. The human hole rehabilitation structure 20 rehabilitates the human hole 10 (manhole) with which the existing pipe 11 communicates.

The manhole 10 is used, for example, in a sewage pipeline, an agricultural channel, or the like. The human hole 10 is an existing vertical hole extending downward from the ground surface. The human hole 10 is made of, for example, concrete.
The existing pipe 11 is formed of, for example, a steel pipe. The existing pipe 11 is formed in a cylindrical shape or a rectangular cylindrical shape. A plurality of existing pipes 11 are provided. The existing pipe 11 extends in the horizontal direction from the human hole 10. A pair of existing pipes 11 are provided with the human hole 10 sandwiched in the horizontal direction. The existing pipe 11 may be provided on one side (one side) in the horizontal direction with respect to the human hole 10. Moreover, instead of the steel pipe, for example, a concrete pipe, a box culvert, a ceramic pipe, a ductile cast iron pipe or the like can be adopted as the existing pipe 11.

  As shown in FIGS. 1 to 4, the human hole rehabilitation structure 20 includes a rehabilitation material 21 (human hole rehabilitation material), a joint 22 (receiving port collar), a new pipe 23 (manhole short pipe), and a stopper 24 ( A stopper rubber ring), an elastic seal 25, a partition wall 26 (wife frame), and a backfill material 27. The rehabilitation material 21, the joint 22 and the new pipe 23 are all formed of a fiber reinforced resin pipe (hereinafter referred to as “FRPM pipe”).

As shown in FIGS. 1 and 2, the rehabilitation material 21 rehabilitates the human hole 10. The rehabilitation material 21 is formed in a cylindrical shape (cylindrical shape) extending in the vertical direction. The rehabilitation material 21 is disposed coaxially with the human hole 10.
The joint 22 is provided on the rehabilitated material 21. A plurality (a pair) of joints 22 are provided corresponding to the existing pipe 11. As shown in FIGS. 3 and 4, the joint 22 is formed in a cylindrical shape (cylindrical shape) and fixed (fixed) to the rehabilitation material 21. The joint 22 is disposed coaxially with the corresponding existing pipe 11. The joint 22 has a smaller diameter than the corresponding existing pipe 11.

  The rehabilitation material 21 has a mounting hole 28 in which the joint 22 is mounted. The mounting hole 28 penetrates the regenerated material 21 in the horizontal direction. The mounting hole 28 is arranged coaxially with the corresponding existing pipe 11. The mounting hole 28 is formed in the same shape as the joint 22 (a circular shape having the same diameter in the illustrated example) in a front view as viewed from the axial direction. The joint 22 is fitted in the mounting hole 28.

The joint 22 and the rehabilitation material 21 are fixed to each other via a fixing portion 29. The fixing part 29 fixes the outer peripheral surface of the joint 22 to the outer peripheral surface or inner peripheral surface of the rehabilitated material 21 over the entire periphery. The fixing portion 29 includes an outer fixing portion 30 and an inner fixing portion 31.
The outer fixing portion 30 fixes the outer peripheral surface of the joint 22 and the outer peripheral surface of the rehabilitated material 21. The outer fixing part 30 includes an outer adhesive layer 30a. The outer adhesive layer 30 a is bonded to both the outer peripheral surface of the joint 22 and the outer peripheral surface of the rehabilitated material 21. The outer adhesive layer 30a is formed by FRP lamination work.

  The inner fixing portion 31 fixes the outer peripheral surface of the joint 22 and the inner peripheral surface of the rehabilitated material 21. The inner fixing part 31 includes a filling part 31a and an inner adhesive layer 31b. The filling part 31 a fills the gap between the outer peripheral surface of the joint 22 and the inner peripheral surface of the rehabilitated material 21. The filling portion 31 a extends continuously along the circumferential direction of the joint 22. The filling portion 31 a extends over the entire circumference of the outer peripheral surface of the joint 22. The filling portion 31 a closes a gap that is slightly formed between the inner peripheral edge of the mounting hole 28 and the outer peripheral surface of the joint 22. The inner adhesive layer 31 b covers the filling portion 31 a from the inside of the rehabilitated material 21. The inner adhesive layer 31 b is bonded to both the outer peripheral surface of the joint 22 and the inner peripheral surface of the renovated material 21. The inner adhesive layer 31b is formed by FRP lamination work.

As shown in FIGS. 1 and 2, the new pipe 23 is arranged in the existing pipe 11. The new pipe 23 communicates the renovated material 21 and the existing pipe 11. The new pipe 23 is fitted (joined or connected) to the joint 22. By fitting (joining or connecting) the new pipe 23 to the joint 22, it is possible to improve the earthquake resistance when the rehabilitated material 21 and the existing pipe 11 are communicated.
A pair of new pipes 23 are provided in the horizontal direction on the existing pipe 11. Each new pipe 23 is fitted (joined or connected) in each joint 22. The new pipe 23 protrudes from the joint 22 along the axial direction (horizontal direction) of the joint 22 to the opposite side of the rehabilitated material 21 (hereinafter, referred to as “the outside in the axial direction”). Thereby, in this embodiment, a pair of new tube 23 protrudes from the rehabilitation material 21 to the both sides of a horizontal direction. For example, when the existing pipe 11 is provided only on one side (one side) in the horizontal direction with respect to the human hole 10, the new pipe 23 is provided on the one side in the horizontal direction with respect to the rehabilitated material 21. It may be provided only in the case, or may protrude only from the rehabilitation material 21 to the one side.

  As shown in FIGS. 3 to 5, the stopper 24 restricts the new pipe 23 from moving toward the rehabilitation material 21 along the axial direction of the joint 22 (hereinafter referred to as “inner side in the axial direction”). . The stopper 24 is provided on the joint 22. The stopper 24 is formed in an annular shape and is fixed to the inner peripheral surface of the joint 22. The inner diameter of the stopper 24 is equal to the inner diameter of the new tube 23. When the new tube 23 is inserted into the joint 22 toward the inner side in the axial direction, the end surface of the new tube 23 abuts against the stopper 24, whereby further movement of the new tube 23 is restricted. The stopper 24 is formed of an elastic body such as rubber.

  The elastic seal 25 is disposed between the tip of the joint 22 and the new tube 23. The elastic seal 25 is formed in an annular shape and is fixed to the inner peripheral surface of the joint 22. The elastic seal 25 is formed of an elastic body such as rubber. The elastic seal 25 is positioned outside the stopper 24 in the axial direction. In a state where the new pipe 23 is fitted in the joint 22, the elastic seal 25 is compressed and deformed between the inner peripheral surface of the joint 22 and the outer peripheral surface of the new pipe 23. The water stoppage between the outer peripheral surface of the pipe 23 is enhanced. At this time, the relative movement between the joint 22 and the new pipe 23 is effectively restricted based on the elastic restoring force of the elastic seal 25.

  As shown in FIGS. 1 and 2, the partition wall 26 is installed between the existing pipe 11 and the new pipe 23, and connects the existing pipe 11 and the new pipe 23. The partition wall 26 is installed at the outer end of the new pipe 23 in the axial direction. The partition wall 26 is formed in an annular shape by, for example, cement brick. The partition wall 26 extends continuously over the entire circumference of the new tube 23 in the circumferential direction. The partition wall 26 closes the space between the existing pipe 11 and the new pipe 23 from the outside in the axial direction.

  The backfill material 27 is filled between the manhole 10 and the rehabilitation material 21. The backfill material 27 is also filled between the existing pipe 11 and the new pipe 23. The backfill material 27 is formed of a filler such as air mortar.

Next, the construction direction of the human hole renovation structure 20 as shown in the flowchart of FIG. 6 will be described.
In addition, the rehabilitation material 21 and the joint 22 are fixed (adhered) in advance before the execution method of the human hole rehabilitation structure 20 is performed. This operation is performed on the ground such as a factory. Thereby, compared with the case where the said operation | work is implemented at a construction site, the stable quality can be ensured.

  In this construction method, first, as shown in FIG. 7 and FIG. 8, a new pipe placement step of placing the new pipe 23 in the existing pipe 11 is performed (S11). At this time, the operator carries the new pipe 23 into the human hole 10 and temporarily places it in the existing pipe 11.

  Next, as shown in FIG. 9 and FIG. 10, a rehabilitation material placement step of placing the rehabilitation material 21 in the human hole 10 is performed (S12). At this time, when the operator carries the rehabilitated material 21 into the manhole 10, the joint 22 fixed to the rehabilitated material 21 is also carried in integrally. At this time, the rehabilitation material 21 is positioned in the human hole 10.

  Next, as shown in FIGS. 11 and 12, a fitting step for fitting the new pipe 23 to the joint 22 is performed (S13). At this time, the new pipe 23 is fitted into the joint 22, and the new pipe 23 is inserted in the axial direction until the movement is restricted by the stopper 24. In this process, the elastic seal 25 is compressed and deformed between the joint 22 and the new pipe 23. Thereby, the rehabilitation material 21 and the new pipe 23 are connected.

Next, as shown in FIGS. 13 and 14, an installation process for installing the partition wall 26 is performed (S14). At this time, the partition wall 26 is installed between the existing pipe 11 and the new pipe 23. Thereby, the existing pipe 11 and the new pipe 23 are connected, and the space between the existing pipe 11 and the new pipe 23 is closed from the outside in the axial direction.
Next, as shown in FIGS. 1 and 2, a filling step for filling the backfill material 27 is performed (S15). At this time, the backfill material 27 is integrally filled between the manhole 10 and the rehabilitated material 21 and between the existing pipe 11 and the new pipe 23. Note that the inflow of the backfill material 27 into the existing pipe 11 is restricted by the partition wall 26.
The construction of the human hole rehabilitation structure 20 is thus completed.

As explained above, according to the human hole rehabilitation structure 20 according to the present embodiment, the new pipe 23 is fitted to the joint 22. Therefore, for example, when an earthquake occurs, the joint 22 and the new pipe 23 can be prevented from being relatively displaced along the radial direction of the joint 22. Thereby, for example, it is possible to suppress the new tube 23 from being detached from the rehabilitated material 21.
On the other hand, since the new pipe 23 is simply fitted to the joint 22, for example, when ground deformation such as subsidence due to liquefaction occurs, the fitting form of the joint 22 and the new pipe 23 is changed to the ground. It can be easily followed according to the deformation. That is, for example, in a state where the joint 22 and the new pipe 23 are fitted to each other, the fitting portion between the joint 22 and the new pipe 23 is bent (see arrow A1 shown in FIG. 5), or the joint 22 and the new pipe 23 can be expanded and contracted (see arrow A2 shown in FIG. 5).
From the above, the seismic performance in the human hole rehabilitation structure 20 can be improved.

Here, the joint 22 is provided on the rehabilitated material 21. Therefore, before arranging the rehabilitation material 21 in the human hole 10, it becomes possible to fix the joint 22 to the rehabilitation material 21 on the ground such as a factory, and the degree of fixation between the rehabilitation material 21 and the joint 22 is determined with accuracy. It can be managed well.
A new pipe 23 is fitted into the joint 22. Therefore, for example, by adjusting the dimensions of the joint 22 and the new pipe 23, the degree of fitting between the joint 22 and the new pipe 23 can be managed with high accuracy.
As described above, both the degree of fixation between the rehabilitated material 21 and the joint 22 and the degree of fitting between the joint 22 and the new pipe 23 can be managed with high accuracy. Thereby, the seismic performance between the rehabilitation material 21 and the new pipe 23 can be managed with high accuracy. Therefore, for example, the seismic performance between the rehabilitated material 21 and the new pipe 23 can be easily designed to satisfy a predetermined seismic performance. As a result, for this seismic performance, for example, standards that have been publicly established for the connection between manholes and pipes (for example, "Guidelines and explanations for seismic facilities for sewerage facilities-2014 edition-(Japan Sewerage Association) ), The reliability of the seismic performance between the rehabilitated material 21 and the new pipe 23 can be ensured, and as the joint 22, for example, the field of the FRPM pipe (for example, JIS A 5350: By adopting the same structure as the joint 22 (receiving port) in the field of reinforced plastic composite pipes defined in 2006), the technical idea about seismic performance confirmed in the same field is applied to the human-hole rehabilitation structure 20 Can also be incorporated.
Furthermore, by managing both the degree of fixation between the rehabilitation material 21 and the joint 22 and the degree of fitting between the joint 22 and the new pipe 23 with high accuracy, for example, the stress generated by horizontal earth pressure due to vertical earth pressure It is possible to manage the strength with respect to the accuracy. Thereby, it becomes possible to ensure the reliability of the strength as well as the above-mentioned seismic performance, and for example, it is possible to use the technical idea about the external pressure performance and the external water pressure performance in the field of the FRPM pipe.

  The new pipe 23 is fitted into the joint 22, and the partition wall 26 connects the existing pipe 11 and the new pipe 23. Therefore, for example, the new pipe 23 can be connected to the rehabilitated material 21 and the existing pipe 11 without using a so-called inner surface band whose long-term service life is not guaranteed. Further, for example, the new pipe 23 can be connected to the rehabilitated material 21 and the existing pipe 11 without performing the FRP lamination bonding operation at the construction site. Here, FRP lamination adhesion may cause an unexpected influence on connection quality due to interface peeling. In addition, the FRP lamination bonding work at the construction site requires special skills, and therefore, variations in quality are likely to occur among workers. In addition, special skills are required in this way, and for example, when there is internal water or groundwater in the existing pipe 11, the work period is affected by the construction environment, and therefore the work period may be delayed. Therefore, in order to connect the new pipe 23 to the rehabilitated material 21 and the existing pipe 11, instead of performing the FRP lamination bonding work at the construction site, the members are fitted together at the construction site. In addition, more accurate quality control can be implemented and the construction period can be stabilized.

Further, the stopper 24 restricts the new pipe 23 from moving toward the inner side of the joint 22 in the axial direction. Therefore, it becomes possible to prevent the excessive insertion at the time of connecting the new pipe 23 to the rehabilitation material 21, and for example, the stopper 24 can be effectively used as an index of construction management.
Further, since the elastic seal 25 is disposed between the joint 22 and the new pipe 23, the water resistance can be effectively improved.
Moreover, since the backfill material 27 is filled between the manhole 10 and the rehabilitation material 21, the seismic performance can be effectively improved.

  Moreover, according to the construction method of the human hole renovation structure 20 according to the present embodiment, the new pipe 23 arranged in the existing pipe 11 is fitted to the joint 22 of the rehabilitation material 21 arranged in the human hole 10. Therefore, the work can be simplified and the workability can be improved.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, the stopper 24 and the elastic seal 25 may not be provided.
In the embodiment, the new pipe 23 is fitted to the joint 22 from the inside, but the new pipe 23 may be fitted to the joint 22 from the outside.

  In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

10 Human hole 11 Existing pipe 20 Human hole rehabilitation structure 21 Rehabilitation material 22 Joint 23 New pipe 24 Stopper 25 Elastic seal 26 Partition wall 27 Backing material

Claims (6)

Rehabilitation material that rehabilitates the human hole that the existing pipe communicates with,
A joint provided on the rehabilitation material;
A manhole rehabilitation structure comprising: a new pipe disposed in the existing pipe and fitted into the joint.   The human hole rehabilitation structure according to claim 1, further comprising a partition wall that is installed between the existing pipe and the new pipe and connects the existing pipe and the new pipe.   The human hole rehabilitation structure according to claim 1 or 2, further comprising a stopper provided on the joint and restricting the new pipe from moving toward the rehabilitation material along the axial direction of the joint.   The human-hole rehabilitation structure according to any one of claims 1 to 3, further comprising an elastic seal disposed between the joint and the new pipe.   The human hole rehabilitation structure according to any one of claims 1 to 4, further comprising a backfill material filled between the human hole and the rehabilitation material. A construction method for a human hole rehabilitation structure for constructing the human hole rehabilitation structure according to any one of claims 1 to 5,
The construction method of the human-hole renovation structure which fits the said new pipe arrange | positioned in the said existing pipe to the said joint of the said renovation material arrange | positioned in the said human hole.

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