KR102082965B1 - Continuous equipment for expansion joint of bridge, and bridge construction method using the same - Google Patents

Abstract

The present invention provides an expansion joint continuation apparatus and a bridge construction method using the same. The expansion joint continuation apparatus comprising a curved support, an embedded reinforcing bar, a concrete block, and a sealant is installed and constructed to prevent noise and impacts created by steps on conventional mechanical expansion joints. Also, the curved support is formed to contract and extend in accordance with a temperature change of a bridge, thereby forming an expansion joint apparatus by a non-joint method without using a conventional water-blocking material. In addition, a manufacturing method and materials of an expansion joint apparatus are simplified to alleviate a problem of function loss caused by damage to partial components such as bolt separation, damage to rubber sealing materials, support beam detachment, and rail damage occurring in mechanical expansion joints, and to be advantageous in maintenance and repair aspects.

Description

Expansion joint sequencing device and bridge construction method using the same {CONTINUOUS EQUIPMENT FOR EXPANSION JOINT OF BRIDGE, AND BRIDGE CONSTRUCTION METHOD USING THE SAME}

The present invention relates to a expansion joint of a bridge, and more particularly, to a bridge construction method using a expansion joint continuity device to form a step that generates noise and impact as a joint-free repair method that requires no mechanical expansion joint. will be.

In general, the bridge can be divided into the upper structure and the lower structure, the upper structure is stretched by load load, temperature change, concrete creep, dry shrinkage, natural disaster, prestressing and the like. In order to allow the expansion and contraction of such an upper structure smoothly, the bridge slab (top plate) is cut and installed to an appropriate length so as to leave a stretching interval of 2-3 cm between unit sections.

However, when rainwater enters the gap between the unit sections or foreign substances such as soil and sand are interposed, the stretching action of the unit concrete section is excessive. In particular, in winter, snow plows, such as calcium chloride, are sprayed on the road, so that snow melted water flows through the gaps to not only corrode the bridges, but also flow down to the bridges to pollute the exterior.

In addition, there is a discontinuity due to the expansion and contraction formation, such a discontinuity is a major obstacle to the running of the vehicle, and thus an expansion joint (Expansion Joint) is installed in the discontinuity of the bridge.

1 is a view showing a bridge formed with a stretch joint according to the prior art.

Specifically, as shown in Figure 1, the bridge 10 is an alternating 11 is installed on both sides; A pier 12 installed at regular intervals between the shifts 11; A mold 14 installed horizontally on the support 13 installed at the point where the alternating or pier 12 meets; And a slab 15 connected to each other in the longitudinal direction by the expansion joint so as to be elastically adapted to the deformation of the mold according to the temperature change at the upper end or one end of the mold 14. At this time, the block out part of the end portion between the slab 15 and the alternating portion 11 and the slab 15 and the slab 15 shown by the reference numeral A is removed. Out) A space is formed for the installation of expansion joints.

As shown in FIG. 1, the expansion joint of the bridge 10 according to the related art connects them between the slab 15 and the slab 15, and installs the expansion joint in this block-out space. The futa ash concrete 17 is poured as embedding material for it.

Such bridge expansion joints include, for example, rubber products such as new monocell joints, monocell joints, NBs, transplexes, and ace joints, and new finger joints, new monocell joints, and new wave fingers. There are steel products such as joints, ultra roadway joints, wave flexible joints, freshness joints, steel finger joints, and rail joints.

2 is a view showing that the expansion joint member is installed in the expansion joint section between the slab and the slab of the bridge according to the prior art, Figure 2a) is a plan view, Figure 2b is a side view.

As shown in a) of FIG. 2, most of the slab 15 of the bridge is covered with an ascon layer to form a paving section, and the futabu concrete 17 is poured into the block-out space to form a connecting section. In addition, the expansion joint member 18 having the finger portion 18a extends to the outside of the space between the slabs 15 arranged at predetermined intervals to cover the gap between the slabs 15 to form a expansion joint section.

The finger portion 18a maintains the road surface of the bridge as a whole even though the gap between the slabs 15 is at the same level as the bridge road surface, and the unevenness of the fingers 18a of the adjacent expansion joint members 18 is uneven. The parts constituting the interlocking parts are engaged with each other to prevent the wheels of the traveling vehicle from falling into the gap between the slabs 15.

At this time, the uneven length of the finger portion 18a is formed in consideration of the thermal expansion length of the slab 15 during the season. For example, in the summer when the slab 15 expands and the engagement period between the unevenness increases in summer, the slab 15 may still have a small gap G between the uneven portion and the convexity. The convex and convex lengths of the adjacent expansion joints between the joints are determined so that the gap is not exposed.

As shown in b) of FIG. 2, the bridge expansion joint according to the prior art, the expansion joint member 18 in the removal portion, that is, the block-out space made on the upper end of the slab longitudinal direction in the traveling direction of the traveling vehicle ) Is installed in the required position, and then, after assembling the formwork and the reinforcing rods concrete 17 is placed and cured in the field is constructed.

 Since the expansion joint member 18 has an anchor 19a attached to its rear surface, the anchor 19a is fixed to the rebar 19b exposed from the slab 15, and then, one side of the expansion joint member 18 is provided. The futajae concrete 17 is poured into the expansion joint member 18 can be integrated with the slab 15. At this time, some of the body of the expansion joint member 18, such as anchor 19a is embedded in the futajae concrete (17).

As described above, expansion joints for joint bridges are used for the purpose of smoothly accommodating expansion and contraction due to temperature changes, expansion and contraction due to creep and dry shrinkage of concrete, and girder deformation of live loads. However, such expansion joints are repeatedly subjected to wheel loads, and are subjected to amplified impact loads by forming discontinuities between the superstructure and the alternating structure of the bridge.

Existing mechanical expansion joints cause breakage of futa ash and expansion joints due to such impact loads, forming a step. This reduces vehicle driving, and causes noise and shock, causing civil complaints. Requires replacement. In addition, there is a problem that the function due to damage to some parts, such as bolt dropping, rubber sealing material damage, support beam detachment, rail breakage that occurred in the mechanical expansion joint may be lost.

On the other hand, as a related art, the Republic of Korea Patent No. 10-1761476 discloses the invention named "replacement construction method for rapid construction of joint bridge expansion joints in a jointless manner", it will be described with reference to FIG. .

3 is a view for explaining a replacement construction method for rapidly constructing a bridge expansion joint according to the prior art in a jointless manner, Figure 3a) is a side view, Figure 3b) unit fiber reinforced precast A perspective view showing a block.

As shown in Figure 3a), a replacement construction method for rapidly constructing a bridge expansion joint according to the prior art in a jointless manner, a) breaker after removing the pavement surface using a road cutter or surface excavator Demolishing the expansion joint device (31) by crushing the concrete layer using; b) installing the leveling plate 33 on both sides so that the same horizontal surface comes out after pouring the superscopy mortar on both bottom surfaces of the dismantlement expansion portion in which the expansion joint device 31 is removed; c) The unit fiber reinforcement precast block 20 precast made of reinforcing fibers and concrete is installed on the upper surface of the leveling plate 33 to have a unit size that can be stored in the demolition expansion portion and to increase tensile force and suppress cracks. Letting it stand; And d) the outer waterproof elastic sealing material 32 is brought into close contact with both ends of the unit fiber reinforcement precast block 20 in the width direction, and the outer waterproof elastic sealing material 32 and the empty space of the dismantlement expansion portion are formed. Filling the non-contraction concrete 40 is made.

In addition, as shown in b) of FIG. 3, the unit fiber reinforcement precast block 20 has a width, a height, and a predetermined length that is smaller than the width and height of the demolition expansion portion, and the steel fiber, glass fiber, A block body 21 in which at least one selected from among carbon fibers, synthetic chemical fibers, and natural fibers is mixed with reinforcing fibers; A sliding ground plate (22) made of steel or hard plastic and synthesized on the lower surface of the block body (21) via a shear connecting material to be in sliding contact with the leveling plate (33) in consideration of friction; The fixing body at both ends in the width direction at regular intervals in the longitudinal direction in the block body 21 is embedded so that a predetermined amount protrudes from the block body 21 and buried in the non-contraction concrete 40 elastically contracted and stretched according to the temperature change of the bridge. Elastic bar 23 is installed in a continuous or discontinuous excellent excellent strain at low strength; And a non-attachment tube which wraps a predetermined section of the elastic bar 23 to have a predetermined non-attachment section between the block body 21 and the elastic bar 23, wherein the lower side block of the block body 21 At the end of the out part, a backing material 25 made of high-foam polyethylene resin or made of high-performance sponge material is installed.

According to the replacement construction method for rapidly constructing a bridge expansion joint according to the prior art in a jointless manner, the rapid expansion of the bridge expansion joint in a jointless manner reduces maintenance costs and minimizes traffic restriction time. have. In addition, the unit fiber reinforced precast block and the non-concrete concrete is formed in the same plane and is unjointed to the connection portion of the existing bridge so that noise and vibration are not generated near the alternating side when the vehicle passes. In addition, the outer waterproof elastic sealing material is installed between the unit fiber reinforced precast block and the non-concrete concrete, and when the bridge is stretched, the unit fiber reinforced precast block side elastic bar contracts and stretches due to the non-bonding section. It can absorb the amount of stretching. In addition, when deformation occurs beyond the shrinkage allowed by the outer waterproof elastic seal material, additional shrinkage absorption may occur due to the inner waterproof elastic seal material to correspond to the stretching of the bridge.

However, in the replacement construction method of rapidly constructing the bridge expansion joint according to the conventional art in a jointless manner, in the case of the unit fiber reinforced precast block 20, the block body 21, the sliding ground plate 22, elastic The bar 23, the non-attachment tube and the backing material 25, and the elastic bar 23 embedded in the non-shrink mortar 40 is excellent in low strength so that the shrinkage and extension behavior in accordance with the temperature change of the bridge Is formed of an elastic material, there is a problem that the shrinkage and elongation due to the temperature change of the bridge is not easy, the rigidity is reduced in the rear part.

Republic of Korea Patent No. 10-1761476 (filed date: July 28, 2015), the title of the invention: "Replacement construction method for rapid construction of joint bridge expansion joints in a jointless manner" Republic of Korea Patent No. 10-1457386 (application date: January 7, 2014), the title of the invention: "High toughness joint joint device to prevent leakage and its construction method" Republic of Korea Patent Publication No. 2010-26917 (published: March 10, 2010), the title of the invention: "Bridge and construction method installed expansion joint device" Republic of Korea Patent No. 10-1498512 (filed September 5, 2014), the title of the invention: "Guard for securing space for induction drainage" Republic of Korea Patent Application Publication No. 2018-0125846 (published: November 26, 2018), the title of the invention: "Construction method of connecting slab joint between the alternating side and the bridge side using a non-perforated anchoring reinforcing bar" Japanese Patent Application Laid-open No. 2007-32057 (published: February 8, 2007), title of the invention: "Expansion and expansion method of bridge joint part and bridge joint method"

The technical problem to be solved by the present invention to solve the above problems, by installing the expansion joint continuity device consisting of a curved support, reinforcing bars, concrete blocks and sealant, which was previously caused by the step in the mechanical expansion joint It is to provide an expansion joint sequencing device and a bridge construction method using the same that can prevent noise and impact.

Another technical problem to be achieved by the present invention, by forming a curved support so that the shrinkage and elongation behavior according to the temperature change of the bridge, the expansion and contraction, which can form a expansion joint device in a joint-free manner without using the existing index material It is to provide a sound continuous device and a bridge construction method using the same.

As a means for achieving the above technical problem, the expansion joint sequencing device according to the present invention, a) manufacturing a curved bearing in consideration of the clearance between the upper slab of the bridge; b) reinforcing the embedded rebar to be embedded by futa ash; And c) installing formwork for concrete block formation and pouring concrete; And d) expansion joints installed in the expansion joint between the expansion joint between the slab of the bridge manufactured by the method of manufacturing the expansion joint continuity device by hardening the pour concrete. striking,
A semi-circular steel material bent in a curve, comprising: a curved support having elasticity to accommodate an amount of stretching of the slab; A buried rebar having one end embedded in the concrete block and the other end disposed to protrude from the concrete block; Concrete blocks are respectively cast on both ends of the curved support; And a sealant injected into an upper portion of the curved support between the concrete blocks, wherein the curved support, the buried rebar, the concrete block, and the sealant are installed in a non-joint manner, and the concrete blocks are formed at both ends of the curved support. One end of the reinforcing reinforcement is formed by pouring concrete, so that the backing material is placed so that the reinforcing bars of the expansion joint continuity device is embedded directly on the back.

Here, the curved support and the sealant injection portion accommodates the amount of expansion and contraction of the slab of the bridge, and can minimize the impact due to malfunction and step due to foreign matter in the bridge expansion joint.

Here, the reinforcing bar is a reinforcing bar, one end of which is embedded in the concrete block, the other end is embedded by the futa material serves to integrate the concrete block with the futa material.

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According to the present invention, it is possible to prevent the noise and impact caused by the step in the conventional mechanical expansion joint by installing and installing the expansion joint continuity device consisting of a curved support, buried rebar, concrete block and sealant.

According to the present invention, it is possible to form the expansion joint device in a jointless manner without using a conventional index material by forming a curved support to shrink and stretch according to the temperature change of the bridge.

According to the present invention, by simplifying the material and the manufacturing method of the expansion joint device, the problem of loss of function due to damage to some components such as bolt dropout, rubber sealing material damage, support beam detachment, rail breakage, etc. occurred in the mechanical expansion joint, By improving, it is advantageous in terms of maintenance.

1 is a view showing a bridge formed with a stretch joint according to the prior art.
2 is a view showing that the expansion joint member is installed in the expansion joint section between the slab and the slab of the bridge according to the prior art.
3 is a view for explaining a replacement construction method for rapidly constructing a bridge expansion joint according to the prior art in a jointless manner.
4 is a cross-sectional view showing a bridge in which the expansion joint continuity device according to the embodiment of the present invention is installed.
5 is a plan view illustrating a bridge in which the expansion joint continuity device according to the embodiment of the present invention is installed.
6 is a cross-sectional view showing the expansion joint sequencing device according to an embodiment of the present invention.
7 is an operation flowchart showing a method of manufacturing an expansion joint sequencing device according to an embodiment of the present invention.
8A to 8C are views for explaining in detail the manufacturing method of the expansion joint sequencing device shown in FIG.
9 is an operation flowchart showing a bridge construction method using the expansion joint sequencing device according to an embodiment of the present invention.
10A to 10C are views for explaining in detail the bridge construction method using the expansion joint sequencing device shown in FIG.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, except to exclude other components unless otherwise stated.

[Expansion joint serializer 140]

4 is a cross-sectional view illustrating a bridge in which an expansion joint continuity device is installed according to an embodiment of the present invention, and FIG. 5 is a plan view illustrating a bridge in which the expansion joint continuity device is installed according to an embodiment of the present invention.

As shown in Figure 4 and 5, the expansion joint sequencing device 140 according to an embodiment of the present invention is the upper slab of the bridge 100 supported by the bridge support 120 installed on the bridge 110 Installed between the 130, as shown by the reference, C, is installed in a jointless manner.

In the case of the expansion joint sequencing device 140 according to the embodiment of the present invention, as a device that can replace the existing mechanical expansion joint, as shown in Figure 6 simplifies the road surface while simplifying the material and manufacturing process It is designed to.

6 is a cross-sectional view showing the expansion joint sequencing device according to an embodiment of the present invention.

Referring to FIG. 6, the expansion joint sequencing device 140 according to the embodiment of the present invention includes a curved support 141, a buried rebar 142, a concrete block 143, and a sealant 144. The curved support 141, the buried rebar 142, and the concrete block 143 are precast, and the installation of the expansion joint sequencing device is completed by injecting the sealant 144 in the field.

The curved support 141 is a semi-circular steel material that is bent in a curve and is formed to have elasticity to accommodate the amount of expansion and contraction of the slab 130.

The embedded rebar 142 is disposed so that one end is embedded in the concrete block 143 and the other end protrudes from the concrete block 143. That is, the buried rebar 142 is a reinforcing bar whose one end is embedded in the concrete block 143, the other end is embedded by the futa material serves to integrate the concrete block 143 with the futa material.

The concrete block 143 is formed by pouring concrete so that both ends of the curved support 141 and one end of the buried rebar 142 are embedded. At this time, the concrete block 143 is poured on both ends of the curved support 141, respectively.

The sealant 144 is injected above the curved support 141 between the concrete blocks 143.

The expansion joint sequencing device 140 according to the embodiment of the present invention is formed in a jointless manner, the amount of expansion and contraction of the slab 130 of the bridge 100 in the curved support 141 and the sealant 144 injection unit This allows to minimize the malfunction due to foreign matter and impact due to the step in the bridge expansion joint.

[Manufacturing method of expansion joint serializer]

7 is a flowchart illustrating a method of manufacturing a stretchable joint continuity device according to an exemplary embodiment of the present invention, and FIGS. 8A to 8C are views for explaining a method of manufacturing a stretchable joint continuity device shown in FIG. 7 in detail.

Referring to FIGS. 7 and 8A to 8C, the method of manufacturing the expansion joint sequencing device according to the embodiment of the present invention may first include a curved support in consideration of the clearance between the upper slabs 130 of the bridge 100. 141) is prepared (S110). At this time, the curved support 141 can accommodate the amount of expansion and contraction of the slab 130 of the bridge 100, and also serves as a conventional index plate.

Next, the embedded rebar 142 to be embedded by the futa material 150 is placed (S120).

Next, install the formwork (143a) for forming the concrete block 143, and pours the concrete (S130). At this time, one end of the buried rebar 142 is embedded in the concrete block 143, the other end protrudes from the concrete block 143.

Next, hardening the pour concrete to complete the manufacture of the expansion joint continuity device 141 (S140).

[Bridge Construction Method using Extension Joints]

9 is an operation flowchart showing a bridge construction method using the expansion joint continuity apparatus according to an embodiment of the present invention, Figure 10a to 10c is a concrete bridge construction method using the expansion joint continuity device shown in FIG. It is a drawing for explaining.

9 and 10a to 10c, the bridge construction method using the expansion joint sequencing device 140 according to an embodiment of the present invention, first, the curved support 141, the buried rebar 142 and concrete The expansion joint sequencing device 140 consisting of blocks 143 is fixed between the upper slab 130 (S210). At this time, in case of replacing the existing expansion joint device, the expansion joint continuity device 140 is fixed after removing the expansion joint device.

Next, the sealant 144 or the sealing material is injected into the curved support 141 between the concrete block 143 of the expansion joint continuity device 140 (S220).

Next, the post-installation material 150 is directly poured so that the embedded reinforcing bar 142 is embedded in the rear surface of the concrete block 143 of the expansion joint continuation device 140 (S230). Here, the futa material 150 may be a non-shrink mortar, and is poured so that the buried reinforcing bar 142 protruded from the concrete block 143 is embedded.

Next, curing the futa material 150 to complete the construction (S240). Accordingly, the slab connection portion of the bridge can be continuous to minimize the occurrence of civil complaints from the vehicle driver by minimizing the impact and noise generated in the expansion joint section when the vehicle is driven.

Accordingly, unlike mechanical expansion joints, which require periodic replacement operations, damage to the expansion joints generated by driving the vehicle can be minimized, thereby facilitating maintenance of facility management subjects. In particular, the manufacturing and space-time simplification of the expansion joint sequencing device according to an embodiment of the present invention can reduce the maintenance cost, semi-permanent use by eliminating the source of the impact caused by the step that is the main cause of damage to expansion joints It becomes possible.

As a result, according to the embodiment of the present invention, it is possible to accommodate the amount of expansion and contraction in the curved support and sealant injection portion, thereby minimizing the impact due to the malfunction and step due to foreign matter in the expansion joint.

The above description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

100: bridge
110: bridge 120: bridge bearing
130: upper slab 140: expansion joint continuous device
150: futajae
141: curved support 142: buried rebar
143: concrete block 144: sealant

Claims (15)

a) manufacturing a curved support 141 in consideration of the clearance between the upper slab 130 of the bridge 100; b) reinforcing the embedded rebar 142 to be embedded by the futa material 150; And c) installing the formwork 143a for forming the concrete block 143 and pouring concrete; And d) is installed in the expansion joint between the slab 130 of the bridge manufactured by the method of manufacturing the expansion joint continuity device comprising the step of completing the expansion joint continuity device 141 by curing the pour concrete Expansion joint continuity device 140 is,
A semicircular steel material that is bent in a curve, the curved base 141 having elasticity to accommodate the amount of expansion and contraction of the slab 130;
A buried rebar 142 having one end embedded in the concrete block 143 and the other end disposed to protrude from the concrete block 143;
Concrete blocks 143 are respectively placed on both ends of the curved support 141; And
It includes a sealant 144 is injected into the curved base 141 between the concrete block 143,
The curved support 141, buried rebar 142, concrete block 143 and sealant 144 is installed in a jointless manner,
The concrete block 143 is formed by pouring concrete so that both ends of the curved support 141 and one end of the buried rebar 142 is embedded, the buried rebar of the expansion joint continuous device 140 directly on the back ( After the pour ash 150 is poured so that 142 is buried
Expansion joint continuous device, characterized in that. The method of claim 1,
The curved support 141 and the sealant 144 injection unit accommodates the amount of expansion and contraction of the slab 130 of the bridge 100, and minimizes the impact due to malfunction and step due to foreign matter in the bridge expansion joint Expansion joint serializer. The method of claim 2,
The curved support 141 is an expansion joint sequencing device, characterized in that it serves as an index plate. The method of claim 1,
The reinforcing bar 142 is a reinforcing bar, one end of which is embedded in the concrete block 143, the other end is embedded by the futa material and the expansion joint characterized in that it serves to integrate the concrete block 143 with the futa material. Serializer. delete delete delete delete delete Manufacturing a curved support 141 in consideration of the clearance between the upper slab 130 of the bridge 100; Reinforcing the embedded rebar 142 to be embedded by the futa material 150; And installing the formwork 143a for forming the concrete block 143 and pouring concrete; And the expansion joints installed between the expansion joints between the slab 130 of the bridge manufactured by the manufacturing method of the expansion joint continuity device, including the step of completing the expansion joint continuity device 141 by curing the poured concrete. As a bridge construction method using the joint continuity device 140,
a) fixing the expansion joint sequencing device 140 including the curved support 141, the buried rebar 142, and the concrete block 143 between the upper slab 130;
b) injecting the sealant 144 into the upper portion of the curved support 141 between the concrete blocks 143 of the expansion joint sequencing device 140;
c) placing the futa material 150 to bury the reinforcing bars 142 of the expansion joint sequencing device 140; And
d) hardening the futa material 150 to complete the construction,
The curved support 141, the buried rebar 142, the concrete block 143 and the sealant 144 of the expansion joint continuity device 140 is installed without joints,
The concrete block of step a) is formed by pouring concrete so that both ends of the curved support 141 and one end of the buried rebar 142 is embedded, and in step c) the expansion joint directly on the back After-filling 150 is poured so that the reinforcing bar 142 of the device 140 is embedded
Bridge construction method using the expansion joint sequencing device characterized in that. delete The method of claim 10,
The curved support 141 and the sealant 144 injection unit accommodates the amount of expansion and contraction of the slab 130 of the bridge 100, and minimizes the impact due to malfunction and step due to foreign matter in the bridge expansion joint Bridge construction method using expansion joint serializer. The method of claim 10,
The reinforcing bar 142 is a reinforcing bar, one end of which is embedded in the concrete block 143, the other end is embedded by the futa material and the expansion joint characterized in that it serves to integrate the concrete block 143 with the futa material. Bridge construction method using serialization device. delete A bridge structure constructed by the bridge construction method using the expansion joint sequencing device according to any one of claims 10, 12 or 13.

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