CN212375729U - Frame type construction system in existing railway temporary bridge construction - Google Patents

Frame type construction system in existing railway temporary bridge construction Download PDF

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Publication number
CN212375729U
CN212375729U CN202021990649.XU CN202021990649U CN212375729U CN 212375729 U CN212375729 U CN 212375729U CN 202021990649 U CN202021990649 U CN 202021990649U CN 212375729 U CN212375729 U CN 212375729U
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China
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construction
frame type
temporary
steel
type construction
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CN202021990649.XU
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Inventor
李传琳
车文庆
张敦宝
姚志国
孙希望
张煜
樊则飞
梁俊雄
夏德俊
彭勃
罗廷斌
蒋永联
余阳
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CREEC Kunming Survey Design and Research Co Ltd
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CREEC Kunming Survey Design and Research Co Ltd
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Abstract

The utility model discloses a frame construction system in existing railway temporary bridge construction, including frame-type construction passageway (1), stake formula pier (2), bent cap (3), railway D type just roof beam (4), interim buttress (5), temporary bridge abutment buttress (6), larsen steel sheet pile (7), telescopic interim protective wall (8), top push back wall (9), steel shotcrete (10). The utility model provides a highway, municipal traffic engineering when guaranteeing to wear existing railway under the railway uninterrupted operation and the assurance railway safety condition, adopt and dig the hole sheet pile and protect, the sheet pile engineering volume is big, need jump the stake excavation, construction cycle is long, to the long problem of existing railway operation influence time, do not adopt the manual work to dig the hole sheet pile and form the construction passageway as the construction safeguard measure of railway temporary bridge pier, the excavation volume reduces, and structural dimension is little, saves the engineering volume, practices thrift the engineering expense, and is economical and reasonable.

Description

Frame type construction system in existing railway temporary bridge construction
Technical Field
The utility model belongs to the technical field of railway, highway, municipal traffic engineering, specifically a frame-type construction system in existing railway temporary bridge construction.
Background
With the development of economy in China, railway and highway traffic is improved continuously, the construction of a road network is enlarged continuously, the situation that a highway and a municipal road are crossed with an existing busy railway often occurs, and in order to meet the connection of front and rear road sections, meanwhile, the influence on the railway is minimized, investment is saved, and the highway and the municipal road are selected to pass through the existing busy railway frequently. The railway is a transportation aorta, and is not allowed to be broken, so in order to ensure the smoothness of the railway, a temporary bridge is generally erected on the existing railway by adopting a temporary bridge, a newly-built structure is constructed under the temporary bridge, the construction of the temporary bridge is all constructed under the existing railway, and the transportation safety of the existing railway is influenced, wherein the construction of the bridge pier of the temporary bridge is difficult, and the general treatment method is to protect by adopting a hole digging sheet pile to form a temporary bridge pier construction channel.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the not enough that exists among the above-mentioned prior art, provide one kind and solve highway, municipal traffic engineering when guaranteeing that the railway does not break up the operation and guarantee to wear existing railway under the railway safety condition, adopt to dig hole sheet pile and protect, sheet pile engineering volume is big, needs the jumping pile excavation, and construction period is long, to the long problem of existing railway operation influence time. The utility model discloses can guarantee the railway operation, it digs deeply for a short time, therefore the frame size is less, the engineering volume is little, and can prefabricate frame-type construction passageway simultaneously when doing interim temporary suspension, adopt telescopic interim protecting wall to carry out the soil body protection in the top pushes away, the stroke that advances at every turn increases, save the construction cycle of construction passageway, and in the later stage construction, constructor is in the frame, safety can obtain guaranteeing, consequently, frame-type construction passageway is solved the highway in adopting existing railway suspension bridge construction, municipal traffic wears existing railway busy railway under and builds the most economical and feasible scheme of suspension bridge pier.
In order to solve the above problems, the utility model adopts the following technical scheme to realize: the frame type construction system in the existing railway temporary bridge construction comprises a frame type construction channel, pile column type piers, a capping beam, a railway D-shaped temporary beam, temporary buttresses, temporary bridge abutment buttresses, Larsen steel sheet piles, telescopic temporary protection walls, a back wall after jacking and steel supports; the frame type construction channel is arranged below a D-shaped temporary beam of the railway, telescopic temporary protective walls are arranged at the top and two sides of the frame type construction channel, a steel support is arranged at a bottom plate close to the front end in the frame type construction channel, and a pile pier construction hole with the diameter larger than that of a pile pier is formed in a top bottom plate;
the pile pier is connected with the capping beam and supports a railway D-shaped temporary girder together with the temporary bridge abutment buttress to form a railway temporary bridge; the Larsen steel sheet piles are positioned on two sides of a side slope at an entrance and an exit of the frame type construction channel; the back wall is located at the rear end of the frame type construction channel.
Preferably, the frame type construction channel is of an integrally cast concrete structure, the clear height is not less than 6m, the clear width is not less than 4.5m, the left side wall and the right side wall are 80cm thick, and the top plate and the bottom plate are 60cm thick.
Preferably, the steel support is I20a I-steel.
Preferably, the telescopic temporary protective wall is connected with the frame type construction channel by adopting a steel rail slideway and can be subjected to telescopic operation.
Preferably, the telescopic temporary protective wall consists of a top plate and lateral steel plates, wherein the top plate is rectangular, the length of the top plate is the sum of S1 and S2, S1 can be 3.18m, S2 can be 2.32m, and the width of the top plate can be the outer width of the frame type construction channel increased by 2 cm; the side steel plates are in a combination of rectangular and trapezoidal shapes, and the widths S3 and S3 of the rectangular shapes can be 3.5 m.
Preferably, the telescopic temporary protection wall adopts I20a I-steel to set up a vertical stiffening rib at the front end of side steel sheet rectangle section apart from edge 25cm, hug closely the welding with the slide end, I-steel one side welding is on telescopic temporary protection wall curb plate steel sheet, the upper end welding is on telescopic temporary protection wall roof, the lower extreme is 23cm apart from the bottom of telescopic temporary protection wall curb plate steel sheet, adopt 60 type rail to connect left and right sides curb plate slide respectively in the position of hugging closely vertical stiffening rib, the end welds with the slide, form the frame and support.
Preferably, 4 channels of 60-shaped steel are arranged on the inner side of the steel plate on the side surface of the telescopic temporary protective wall to serve as sliding rails.
Preferably, a steel slide way is embedded at the position, corresponding to the inner side sliding track of the steel plate on the side face of the telescopic temporary protective wall, of the front end of the frame type construction channel, the steel slide way is correspondingly matched with the sliding track, the width of the steel slide way is enlarged by 3-5 mm, and a bridge tail with the length of 20cm is arranged at the rear end of the frame type construction channel and transits to the outside of the side wall of the frame.
Preferably, the length of the Larsen steel sheet pile is determined according to the height of the side slope, the shortest length is not less than 4m, and the ratio of the exposed side slope part to the embedded side slope part is 1: 1.5.
A construction method for constructing a frame type construction system in the construction of an existing railway temporary bridge comprises the following steps:
(1) reinforcing the existing railway line by adopting 3-5-5-3 rail beam;
(2) performing accurate lofting, constructing temporary buttresses and temporary abutment buttresses, prefabricating a telescopic temporary protective wall in a factory, flattening and filling a foundation on line, constructing a frame type construction channel and a back wall after pushing, and pre-burying a steel slide way and a steel support when constructing the frame type construction channel;
(3) erecting a railway D-shaped temporary beam on the temporary buttress;
(4) and installing a telescopic temporary protective wall at the front end of the prefabricated frame type construction channel, and installing pushing equipment.
(5) Excavating an existing embankment by about 20cm, starting small pushing equipment at the front end, and pushing the telescopic temporary protective wall to extend forwards;
(6) repeatedly digging and pushing the telescopic temporary protection wall until the telescopic temporary protection wall extends out by 2 m;
(7) stopping front end excavation, starting a pushing device at the rear end of the frame type construction channel, performing jacking construction on the frame type construction channel, moving the frame type construction channel forwards, slowly contracting the telescopic temporary protection wall until the distance of jacking reaches 2m, and stopping jacking operation;
(8) continuously repeating the steps of 5-7 until the frame type construction channel reaches the designed position;
(9) removing the pushing equipment and the telescopic temporary protective wall;
(10) constructing Larsen steel sheet piles for protection, and flattening channels on two sides;
(11) forming holes in the frame type construction channel according to the positions of the reserved holes;
(12) constructing a pile foundation of the pile-type pier, the pier and the capping beam in the frame-type construction channel;
(13) the movable railway D-shaped temporary beam is erected on the temporary bridge abutment buttress and the cover beam, and a hole railway D-shaped temporary beam is added to complete temporary bridge erection construction;
(14) and excavating soil under the temporary bridge according to the design, removing the frame type construction channel, constructing a temporary bridge design project, removing the railway D-shaped temporary beam after construction, recovering the existing line, and finishing construction.
Compared with the prior art, the utility model has the advantages of it is following:
(1) the frame type construction system and the construction method in the existing railway temporary bridge construction can ensure the railway safe operation, and can form a construction channel without adopting manual hole digging sheet piles as the construction protection measures of the railway temporary bridge pier, so that the excavation amount is small, the structure size is small, the engineering amount is saved, the construction channel can be prefabricated outside a line, the jacking construction is fast, the construction time is shortened, and the influence on the railway operation safety is reduced.
(2) The frame type construction method has the advantages that hole digging piles are not adopted, danger caused by manual hole digging is avoided, the frame type is adopted, it is guaranteed that construction personnel are not injured by falling objects, safety of the construction personnel is guaranteed, the frame body is coordinated with front and rear roads, and the appearance effect is good.
(3) The construction can be implemented more safely, the construction period is short, the construction cost is saved, the method is economical and reasonable, and the technology is innovative.
Drawings
FIG. 1 is a schematic diagram of a vertical section layout of a pier construction channel of a temporary bridge;
FIG. 2 is a schematic plan view of a bridge pier construction channel;
FIG. 3 is a schematic view of a temporary bridge arranged in a bridge-forming elevation;
FIG. 4 is a schematic plan view of a temporary bridge;
FIG. 5 is a schematic representation of a pier of a temporary bridge in a front view;
FIG. 6 is a schematic diagram of the jacking of a construction channel of a pier of the temporary bridge;
FIG. 7 is a schematic cross-sectional view of a retractable temporary protective wall;
in the figure: the construction method comprises the following steps of 1-frame type construction channel, 2-pile type pier, 3-capping beam, 4-railway D-shaped temporary beam, 5-temporary buttress, 6-temporary abutment buttress, 7-Larsen steel plate pile, 8-telescopic temporary protective wall, 9-top-push back wall and 10-steel support.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
As shown in fig. 1-5, a frame type construction channel 1 of a frame type construction system in the existing railway temporary bridge construction is arranged below a temporarily arranged railway D-shaped temporary beam 4, is prefabricated outside an on-line mode, and is quickly jacked to be constructed in place. The clear height is 6m, the clear width is 4.5m, the left and right side walls are 80cm thick, the top and bottom plates are 60cm thick, the position of the pile type pier 2 after the frame type construction channel 1 is pushed in place is determined through calculation, when the frame type construction channel 1 is prefabricated, a construction hole of the pile type pier 2 is reserved in the top and bottom plates, the diameter of the hole is larger than that of the pile type pier 2, and the periphery of the hole is reinforced by reinforcing steel bars. The number and the span of the hole span of the railway D-shaped temporary beam 4 are set according to the arrangement condition of an offline project, the temporary bridge needs to be erected twice, when the temporary bridge pier 2 is constructed, the temporary bridge pier 2 needs to be temporarily supported in an overhead mode according to the arrangement condition of a temporary bridge, the temporary bridge pier is arranged on the temporary buttress 5, the temporary buttress 5 is of a concrete structure with the length of 5m, the width of 2m and the height of 1m, the temporary buttress 5 is constructed after a line is reinforced by adopting a 3-5-5-3 track beam, the structural size and the construction method of the temporary buttress 6 are the same as those of the temporary buttress 5, after the construction of the temporary bridge pier 2 and the cover beam 3 is finished, the arrangement of the railway D-shaped temporary beam 4 is adjusted, the temporary buttress 5 is adjusted to the tops of the temporary buttress 6 and the cover beam 3, and the railway D-shaped temporary beam 4 is added, and the temporary bridge erection is finished.
As shown in fig. 6-7, a telescopic temporary protective wall 8 is installed at the front end of a frame-type construction channel 1 of a frame-type construction system in existing railway temporary bridge construction, and is connected with the frame-type construction channel 1 by a steel rail slideway and can be operated in a telescopic mode. The telescopic temporary protection wall 8 is arranged at the top and two sides of the frame type construction channel 1 by adopting steel plates with the thickness of 1cm and is welded at the top. The top plate is rectangular, the length is the sum of S1 and S2, the length of S1 is 3.18m, the length of S2 is 2.32m, and the width is the outer width of the frame type construction channel increased by 2 cm; the side surface is in a combined form of rectangle and trapezoid. The rectangular width S3 and S3 are 3.5m, 1m of the rectangular width S3 and S3 is always wrapped at the front end of the frame type construction channel, 2m of the rectangular width S3 and 2m of the rectangular width S3 can stretch along the track, the total shrinkage condition is exposed by 0.5m, the total extension condition is exposed by 2.5m, the height is 4cm of the total height of the frame type construction channel, the thickness of a top plate of the frame type construction channel is 1cm, the bottom surface of the frame type construction channel exceeds 3cm of the frame, the frame type construction channel is made into an oblique opening, 4 lines of 60 steel rails are arranged on the side surface and welded on the inner side of a steel plate, the steel rails are used as sliding tracks and stiffening ribs for reinforcing the steel plate, the length of the steel rails is S1= S3-0.3m, the center of the lowest rail is arranged at a position 0.15m higher than the top plate of the frame type construction channel, the center of the upper rail is flush with the bottom, the embedded slideway L1 is 3m, the bridge tail with the length of 20cm is arranged at the rear end and transits to the outside of the side wall of the frame type construction channel, a vertical stiffening rib is arranged at the position 25cm away from the edge at the front end of the rectangular section of the side plate by adopting I20a I-steel, the I-steel is tightly adhered and welded with the end of the slideway, one surface of the I-steel is welded on the side plate, the upper end of the I-steel is welded on the top plate, the lower end of the I-steel is 23cm away from the bottom of the side plate, the positions close to the vertical stiffening rib at the front ends of the upper rail and the lower; the front end of each side plate is in an inverted trapezoid shape, the distance between the trapezoid and the bottom of each side plate is H2, H2 is 1.6m, the right-angle side of each trapezoid is aligned with a rectangle, the upper bottom of each trapezoid is H1, H1 is 1.5m, the lower bottom of each trapezoid is H2 m reduced in height of the rectangular section, the height of each trapezoid is 2m, steel rails are welded at the positions, corresponding to the slideways, of the trapezoid, and serve as stiffening ribs, the distance between each steel rail and the front end of each trapezoid is 0.3m, I20a I-steel is adopted at the position, 25cm away from the edge, of the front end of each trapezoid, each I-steel is provided with a broken line stiffening rib, the broken line stiffening ribs are welded with the ends of the track of the left side plate and the right side plate in a clinging mode, one side steel is welded on the side plates, the upper ends of the vertical stiffening ribs.
The method comprises the steps that a telescopic temporary protection wall is arranged at the front end of a frame type construction channel, 2 steel supports 10 are arranged at the proper position, close to the front end, of a bottom plate inside the frame type construction channel, the length of a soil body at the front end of an excavation is about 20cm, a small pushing device is adopted to use the steel supports 10 as backs, the telescopic temporary protection wall 8 is pushed to advance, temporary protection is carried out on the excavated space, circulation is carried out, the telescopic temporary protection wall is pushed forward to reach 2m when the pushing device is pushed, the frame type construction channel 1 is started, the rear end pushing device is used to push the back wall 9 as a support, the frame type construction channel is pushed forward for 2m, circulation is carried out, the pushing is carried out until the frame.
And a steel support 10 is arranged on a front end bottom plate of the frame type construction channel and is used as a jack support for jacking construction of the telescopic temporary protective wall 8. The steel supports are arranged at a position 1.5m away from the front end of the frame type construction channel, I20b I-steel with the length of 80cm is embedded into the bottom plate of the frame type construction channel by 40cm, the leg surfaces of the I-steel face forward, the back surface of the frame type construction channel is obliquely supported by another I-steel according to 45 degrees and is embedded into the bottom plate of the frame type construction channel, the bottom of the frame type construction channel is flush with the vertical member, two steel supports are horizontally arranged, and the distance between each steel support and the side wall is 1 m.
The embodiment of the utility model provides a main construction steps and method as follows:
(1) reinforcing the existing railway line by adopting 3-5-5-3 rail beam;
(2) performing accurate lofting, constructing a temporary buttress 5 and a temporary abutment buttress 6, prefabricating a telescopic temporary protective wall 8 in a factory, flattening and filling a foundation outside on line, constructing a frame type construction channel 1 and a pushing back wall 9, and embedding a steel slide way and a steel support 10 when constructing the frame type construction channel 1;
(3) erecting a railway D-shaped temporary beam 4 on the temporary buttress 5;
(4) and a telescopic temporary protective wall 8 is arranged at the front end of the prefabricated frame type construction channel 1, and pushing equipment is arranged.
(5) Excavating the existing embankment by about 20cm, starting small pushing equipment at the front end, and pushing the telescopic temporary protective wall 8 to extend forwards;
(6) repeatedly digging and pushing the telescopic temporary protective wall 8 until the telescopic temporary protective wall 8 extends out by 2 m;
(7) stopping front end excavation, starting a pushing device at the rear end of the frame type construction channel 1, performing jacking construction on the frame type construction channel, moving the frame type construction channel forwards, slowly contracting the telescopic temporary protection wall 8 until the distance of jacking reaches 2m, and stopping jacking operation;
(8) continuously repeating the steps of 5-7 until the frame type construction channel reaches the designed position;
(9) removing the pushing equipment and the telescopic temporary protective wall;
(10) constructing Larsen steel sheet piles 7 for protection, and flattening channels on two sides;
(11) forming holes in the frame type construction channel according to the positions of the reserved holes;
(12) constructing a pile foundation of a pile column type pier 2, a pier and a capping beam 3 in the frame type construction channel;
(13) the movable railway D-shaped temporary beam 4 is erected on the temporary bridge abutment buttress 6 and the cover beam 3, and a hole railway D-shaped temporary beam is added to complete the construction of temporary bridge erection;
(14) and excavating soil under the temporary bridge according to the design, removing the frame type construction channel, constructing a temporary bridge design project, removing the railway D-shaped temporary beam after construction, recovering the existing line, and finishing construction.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The utility model provides a frame type construction system in existing railway temporary bridge construction which characterized in that: the construction method comprises a frame type construction channel (1), pile column type piers (2), capping beams (3), railway D-shaped temporary beams (4), temporary buttresses (5), temporary abutment buttresses (6), Larsen steel sheet piles (7), telescopic temporary protection walls (8), pushing back walls (9) and steel supports (10);
the frame type construction channel (1) is arranged below a railway D-shaped temporary beam (4), telescopic temporary protective walls (8) are arranged at the top and two sides of the frame type construction channel, a steel support (10) is arranged at a bottom plate close to the front end in the frame type construction channel, and a pile column type pier (2) construction hole with the diameter larger than that of the pile column type pier (2) is formed in a top bottom plate;
the pile column type pier (2) is connected with the capping beam (3) and supports a railway D-shaped temporary beam (4) together with a temporary bridge abutment buttress (6) to form a railway temporary bridge;
the Larsen steel sheet piles (7) are positioned on two sides of a side slope of an inlet and an outlet of the frame type construction channel (1);
the back wall (9) is positioned at the rear end of the frame type construction channel (1).
2. The frame type construction system in the existing railway temporary bridge construction, according to claim 1, is characterized in that: the frame type construction channel (1) is integrally cast with a concrete structure, the net height is not less than 6m, the net width is not less than 4.5m, the left side wall and the right side wall are 80cm thick, and the top plate and the bottom plate are 60cm thick.
3. The frame type construction system in the existing railway temporary bridge construction, according to claim 1, is characterized in that: the steel support (10) adopts I20a I-shaped steel.
4. The frame type construction system in the existing railway temporary bridge construction, according to claim 1, is characterized in that: the telescopic temporary protective wall (8) is connected with the frame type construction channel (1) by a steel rail slideway and can be telescopic.
5. The frame type construction system in the existing railway temporary bridge construction, according to claim 4, is characterized in that: the telescopic temporary protective wall (8) consists of a top plate and side steel plates, wherein the top plate is rectangular, the length of the top plate is the sum of S1 and S2, and the width of the top plate is 2cm larger than the outer width of the frame type construction channel (1); the side steel plate is in a combined shape of a rectangle and a trapezoid, and the rectangle is wide S3.
6. The frame type construction system in the existing railway temporary bridge construction, according to claim 5, is characterized in that: telescopic interim protecting wall (8) adopt I20a I-steel to set up a vertical stiffening rib apart from edge 25cm department at the front end of side steel sheet rectangle section, hug closely the welding with the slide end, I-steel one side welding is on telescopic interim protecting wall (8) curb plate steel sheet, the upper end welding is on telescopic interim protecting wall (8) roof, 23cm at the bottom of the lower extreme apart from telescopic interim protecting wall (8) curb plate steel sheet, adopt 60 type rail to connect about curb plate slide respectively in the position of hugging closely vertical stiffening rib, the end welds with the slide, form the frame and support.
7. The frame type construction system in the existing railway temporary bridge construction, according to claim 5, is characterized in that: 4 channels of 60-shaped steel are arranged on the inner side of the steel plate on the side surface of the telescopic temporary protective wall (8) and used as sliding rails.
8. The frame type construction system in the existing railway temporary bridge construction, according to claim 1, is characterized in that: the front end of the frame type construction channel (1) corresponds to the embedded steel slide way at the inner side sliding rail position of the steel plate on the side surface of the telescopic temporary protective wall (8), the steel slide way is correspondingly matched with the sliding rail, the width is enlarged by 3-5 mm, and the bridge tail with the length of 20cm is arranged at the rear end and transits to the outside of the side wall of the frame type construction channel (1).
9. The frame type construction system in the existing railway temporary bridge construction, according to claim 1, is characterized in that: the length of the Larsen steel sheet pile (7) is determined according to the height of the side slope, the shortest length is not less than 4m, and the ratio of the exposed side slope part to the embedded side slope part is 1: 1.5.
CN202021990649.XU 2020-09-11 2020-09-11 Frame type construction system in existing railway temporary bridge construction Active CN212375729U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021990649.XU CN212375729U (en) 2020-09-11 2020-09-11 Frame type construction system in existing railway temporary bridge construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021990649.XU CN212375729U (en) 2020-09-11 2020-09-11 Frame type construction system in existing railway temporary bridge construction

Publications (1)

Publication Number Publication Date
CN212375729U true CN212375729U (en) 2021-01-19

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Application Number Title Priority Date Filing Date
CN202021990649.XU Active CN212375729U (en) 2020-09-11 2020-09-11 Frame type construction system in existing railway temporary bridge construction

Country Status (1)

Country Link
CN (1) CN212375729U (en)

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