CN110565457A - Method for renovating exposed reinforcing steel bars of ballastless track base and repairing structure - Google Patents
Method for renovating exposed reinforcing steel bars of ballastless track base and repairing structure Download PDFInfo
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- CN110565457A CN110565457A CN201910773254.XA CN201910773254A CN110565457A CN 110565457 A CN110565457 A CN 110565457A CN 201910773254 A CN201910773254 A CN 201910773254A CN 110565457 A CN110565457 A CN 110565457A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
- E01B1/002—Ballastless track, e.g. concrete slab trackway, or with asphalt layers
- E01B1/004—Ballastless track, e.g. concrete slab trackway, or with asphalt layers with prefabricated elements embedded in fresh concrete or asphalt
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
- E01B29/005—Making of concrete parts of the track in situ
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
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- Working Measures On Existing Buildindgs (AREA)
Abstract
the embodiment of the application provides a method for renovating the exposed reinforcing steel bars of a ballastless track base, which comprises the steps of chiseling the concrete at the periphery of the exposed reinforcing steel bars to form a repair cavity; cutting off the longitudinal steel bar in the repair cavity according to the reserved length to form a first reserved end; longitudinally arranging first reinforcing steel bars in the repair cavity, wherein the first reinforcing steel bars are connected with the first reserved end, and the height of at least part of the first reinforcing steel bars is lower than that of the first reserved end; and pouring concrete into the repair cavity to form a repair base. The problem of longitudinal reinforcement of ballastless track base exposes is solved. The embodiment of the application also provides a repairing structure for the exposed reinforcing steel bars of the ballastless track base, which is formed by the renovating method and has the same beneficial effects as the renovating method.
Description
Technical Field
the application relates to the technical field of maintenance of ballastless tracks of railways, in particular to a method for renovating the exposure of reinforcing steel bars of a ballastless track base and a repairing structure.
Background
the ballastless track comprises a base, a track plate and a steel rail, wherein the track plate is located above the base, and the steel rail is located above the track plate. The base comprises transverse reinforcing steel bars, longitudinal reinforcing steel bars positioned on the upper side and the lower side of the transverse reinforcing steel bars and concrete poured on the peripheries of the transverse reinforcing steel bars and the longitudinal reinforcing steel bars, and the base is influenced by the quality of the concrete, a construction process, train vibration and weather, particularly under the influence of freeze-thaw cycles in winter, the concrete of the base is easy to crack, pulverize and fall off, so that the longitudinal reinforcing steel bars are exposed, the exposed longitudinal reinforcing steel bars are corroded, and the durability of a ballastless track structure is seriously influenced.
disclosure of Invention
In view of this, an embodiment of the present application is expected to provide a method for repairing exposed reinforcing steel bars of a ballastless track base and a repair structure, so as to solve the problem that longitudinal reinforcing steel bars of the ballastless track base are exposed, and to solve the above technical problem, a technical scheme of the embodiment of the present application is implemented as follows:
An embodiment of the application provides a method for renovating the exposed reinforcing steel bars of a ballastless track base, which comprises the following steps:
Chiseling the concrete at the periphery of the exposed reinforcing steel bars to form a repair cavity;
Cutting off the longitudinal steel bar in the repair cavity according to the reserved length to form a first reserved end;
Longitudinally arranging first reinforcing steel bars in the repair cavity, wherein the first reinforcing steel bars are connected with the first reserved end, and the height of at least part of the first reinforcing steel bars is lower than that of the first reserved end;
And pouring concrete into the repair cavity to form a repair base.
Further, chiseling the concrete around the exposed steel bars to form a repair cavity, comprising: and chiseling concrete in the range of 0.2-0.5 m respectively in front of and behind the exposed longitudinal steel bar along the longitudinal direction.
Furthermore, the transverse width of the repair cavity is 150-300 mm, and the vertical depth is less than or equal to 100 mm.
further, the upper end face of the repair base is flush with the upper end face of the base;
Or the transverse gradient of the upper end surface of the repair base is more than or equal to 2%.
further, after the step of pouring concrete into the repair cavity to form the repair base, the renovation method comprises the step of arranging a waterproof layer on the upper end surface of the repair base.
further, before the step of pouring concrete into the repair cavity to form a repair base, the renovation method comprises the following steps:
And cutting the exposed transverse steel bar according to the reserved length to form a second reserved end, transversely arranging a second steel bar in the repair cavity, and connecting the second steel bar with the second reserved end to fix the second steel bar.
further, the step of longitudinally arranging a first steel bar in the repair cavity, wherein the first steel bar is connected with the first reserved end, and the height of at least part of the first steel bar is lower than that of the first reserved end includes: the auxiliary reinforcement is arranged, one end of the auxiliary reinforcement is connected with one end of the first reinforcing steel bar, the other end of the auxiliary reinforcement is connected with the first reserved end, and the first reinforcing steel bar is connected with the first reserved end through the auxiliary reinforcement.
further, the length of the first reserved end is greater than or equal to 250 mm.
Further, the connection length between the auxiliary rib and the first reserved end is C, wherein C is more than or equal to 160mm and less than or equal to 250 mm.
on the other hand of the embodiment of this application provides an exposed restoration structure of ballastless track base reinforcing bar, includes: the first steel bar and the first reserved end of the longitudinal steel bar are connected, and at least part of the first steel bar is lower than the first reserved end.
according to the method for renovating the ballastless track base reinforcing steel bar exposure, the longitudinal reinforcing steel bar in the repair cavity is cut, the first reinforcing steel bar is longitudinally arranged in the repair cavity and connected with the first reserved end, and the height of at least part of the first reinforcing steel bar is lower than that of the first reserved end, namely, at least part of the first reinforcing steel bar is located below the first reserved end. In addition, the height of at least part of the first steel bars is lower than that of the first reserved end, so that the height and the thickness of the concrete layer above the repaired first steel bars meet the requirements of construction specifications, the thickness of the concrete layer above the first steel bars can be larger than that of the concrete layer above the longitudinal steel bars, and meanwhile, the height of the concrete layer above the first steel bars can be equal to or smaller than that of the concrete layer above the longitudinal steel bars. The embodiment of the application also provides a repair structure for the exposed reinforcing steel bars of the ballastless track base, which is formed by the renovation method and has the same repair effect as the renovation method.
Drawings
Fig. 1 is a flowchart of a method for remedying the exposed reinforcing steel bars of a ballastless track base in the embodiment of the application;
Fig. 2 is a cross-sectional view of a ballastless track in an embodiment of the present application;
Fig. 3 is a flowchart of another method for remedying the exposed reinforcement of the ballastless track base in the embodiment of the application;
Fig. 4 is a flowchart of another method for remedying the steel bar exposure of the ballastless track base in the embodiment of the application;
Fig. 5 is a side view of a first rebar, a second rebar, and a longitudinal rebar structure in an embodiment of the present application;
fig. 6 is a top view of fig. 5.
Description of the reference numerals
A base 100; repairing the base 200; a reinforcing bar 10; transverse reinforcing steel bars 11; longitudinal reinforcing bars 12; a first reserved port 12 a; a first reinforcing bar 20; and auxiliary ribs 30.
Detailed Description
It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.
In the description of the present application, "m" represents international unit meter, "mm" represents international unit millimeter, "upper", "lower", "inner", "outer", "front", "rear" orientation or positional relationship is based on the orientation of the ballastless track, "longitudinal" is the extending direction of the ballastless track, and "transverse" is the orientation or positional relationship of fig. 2. It is to be understood that such directional terms are merely for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application.
An embodiment of the present application provides a method for renovating an exposed reinforcing steel bar of a ballastless track base, please refer to fig. 1 and 2, and the method includes:
S01, chiseling the concrete around the exposed steel bar to form a repair cavity;
S02, cutting off the longitudinal steel bar in the repair cavity according to the reserved length to form a first reserved end;
s03, longitudinally arranging first steel bars in the repair cavity, wherein the first steel bars are connected with the first reserved end, and the height of at least part of the first steel bars is lower than that of the first reserved end;
And S04, pouring concrete into the repair cavity to form a repair base.
Various detailed embodiments of the method for renovating the exposed reinforcing steel bars of the ballastless track base provided by the embodiment of the application are specifically described below, and it should be noted that the detailed embodiments can be selected according to different requirements of construction.
Referring to fig. 2, the reinforcing bars 10 in the base 100 include transverse reinforcing bars 11 and longitudinal reinforcing bars 12 disposed at upper and lower sides of the transverse reinforcing bars 11, and after the exposed longitudinal reinforcing bars 12 are corroded, the corroded longitudinal reinforcing bars 12 need to be removed, and the corroded longitudinal reinforcing bars 12 need to be replaced with new reinforcing bars, thereby ensuring the structural strength and durability of the base. Therefore, in the embodiment of the present invention, the concrete around the exposed reinforcing bars 10 is first chiseled by using an electric pick or a pneumatic pick, etc., to form a repair cavity (not shown). It can be understood that the inner wall of the repair cavity is a rough new interface, and in the chiseling process, concrete which is loose in the range and not firmly connected can be chiseled, so that the structural stability of the subsequent repair base can be maintained conveniently. The longitudinal bars 12 in the base are positioned at the upper sides of the transverse bars 11, and after the concrete around the exposed bars is chiseled, the longitudinal bars and the transverse bars, which are not corroded, are exposed for construction work.
The longitudinal reinforcement 12 in the repair cavity is cut off by a device such as an angle grinder according to the reserved length to form a first reserved end (not shown). That is, the middle section of the longitudinal reinforcing bar 12 in the repair cavity is cut off according to the reserved length, and the remaining reserved length of the longitudinal reinforcing bar 12 is the first reserved end 12a (see fig. 5).
And longitudinally arranging first reinforcing steel bars 20 in the repair cavity, wherein the first reinforcing steel bars 20 are new reinforcing steel bars, the first reinforcing steel bars 20 are connected with the first reserved end 12a, and the height of at least part of the first reinforcing steel bars 20 is lower than that of the first reserved end 12 a. It should be noted that the "height" in the embodiment of the present application is taken as a reference plane, that is, at least a portion of the first reinforcing bar 20 is located below the first reserved end 12 a. Since the height of at least a portion of the first rebars is lower than the height of the first reserved end, the thickness of the concrete layer above the first rebars 20 can be greater than the thickness of the concrete layer above the longitudinal rebars 12, and the height of the concrete layer above the first rebars 20 can be equal to or less than the height of the concrete layer above the longitudinal rebars 12. Therefore, the problem that liquid cannot be discharged along the upper end face of the repair base due to the fact that the height of the concrete layer above the first steel bars 20 is too high can be avoided; the problem that the concrete layer above the first steel bar 20 is easy to crack, pulverize and fall off again due to the fact that the thickness of the concrete layer above the first steel bar 20 is too thin can be avoided.
It can be understood that, if the height of the first steel bar 20 is higher than the height of the first reserved end 12a, in the construction process, in order to ensure that the thickness of the concrete layer above the first steel bar 20 meets the relevant specification requirements, and to avoid the thickness of the concrete layer above the first steel bar 20 being too thin, the height of the concrete layer above the first steel bar 20 is easily caused to be too high, that is, the height of the upper end surface of the repairing base 200 is higher than the height of the upper end surface of the base 100, such a structure will cause liquid to be unable to be discharged along the upper end surface of the repairing base 200, and there is a problem of liquid accumulation on the side of the repairing base 200 close to the track slab. If the height of the upper end surface of the repair base 200 is equal to or less than the height of the upper end surface of the base 100, the thickness of the concrete layer above the first steel bar 20 is too thin, and the concrete layer above the first steel bar 20 is likely to crack, pulverize, and fall off again. Therefore, in the embodiment of the present application, the height of at least a portion of the first rebars is lower than the height of the first reserved end, so that the thickness of the concrete layer above the first rebars 20 may be greater than the thickness of the concrete layer above the longitudinal rebars 12, and meanwhile, the height of the concrete layer above the first rebars 20 may be equal to or less than the height of the concrete layer above the longitudinal rebars 12.
Specifically, the first reinforcing bar 20 is connected with the first reserved end 12a, and the first reinforcing bar 20 is fixed, and the first reinforcing bar 20 may be overlapped with the first reserved end 12a, and the overlapped part of the first reinforcing bar 20 and the first reserved end 12a is welded to fix the first reinforcing bar 20. In order to further fix the first reinforcing bars 20, a portion of the first reinforcing bars 20 may be closely attached to the transverse reinforcing bars 11, and the contact portions of the first reinforcing bars 20 and the transverse reinforcing bars 11 may be welded or tied by using binding wires or tying reinforcing bars. It can be understood that, if the first reinforcing bar 20 directly overlaps the first reserved end 12a, the portion of the first reinforcing bar 20 close to the first reserved end 12a is bent toward the first reserved end 12a, that is, the portion of the first reinforcing bar 20 close to the first reserved end 12a is S-shaped, and the height of the portion of the first reinforcing bar 20 not connected to the first reserved end 12a is lower than the height of the first reserved end 12 a.
and pouring concrete into the repair cavity to form the repair base 200. Specifically, the interfacial agent is prepared in proportion and is uniformly sprayed on the inner wall of the repair cavity. Preparing concrete according to the calculated amount and the set proportion, adding water and stirring uniformly, pouring into the repair cavity, vibrating by a vibrating bar and a flat plate vibrator, and trowelling to form the repair base 200. Concrete curing agents can be sprayed on the upper end face of the repairing base 200, cotton quilts cover the upper end face of the repairing base 200 to preserve heat if necessary, the concrete of the repairing base 200 is polished and repaired by an angle grinder, the surface of the repairing base 200 is smooth and tidy, and the surface of the repairing base 200 can be blown clean by a blower.
In order to completely cut off the exposed longitudinal steel bars 12 and facilitate the subsequent setting and construction of the first steel bars 20, in an embodiment of the present application, please refer to fig. 1, S01, and the step of chiseling the concrete around the exposed steel bars to form a repair cavity includes: and chiseling concrete in the range of 0.2-0.5 m away from the exposed longitudinal steel bars in the longitudinal direction. It is understood that "front" is the longitudinal extension direction of the ballastless track, and "rear" is the opposite direction of "front".
In order to facilitate subsequent construction, in an embodiment of the present application, the transverse width of the repair cavity is 150mm to 300mm, and the vertical depth is less than or equal to 100 mm.
In an embodiment of the present application, please refer to fig. 2, an upper end surface of the repair base 200 is flush with an upper end surface of the base 100. The upper end surface of the repair base 200 is prevented from being higher than the upper end surface of the base 100, so that liquid is prevented from accumulating around the repair base 200.
in an embodiment of the present application, please refer to fig. 2, a transverse gradient of an upper end surface of the repair base 200 is greater than or equal to 2%. This design facilitates more easy drainage of the fluid on the upper end surface of the prosthetic base 200.
In order to prevent the liquid on the upper end surface of the repair base 200 from penetrating into the repair base 200, in an embodiment of the present application, referring to fig. 3, after the step of pouring concrete into the repair cavity to form the repair base, the renovation method includes S05, and disposing a waterproof layer on the upper end surface of the repair base.
Specifically, the waterproof layer (not shown) is made of a waterproof material to prevent liquid from penetrating. In a specific embodiment, the step of disposing a waterproof layer on the upper end surface of the repair base includes: cleaning the upper end surface of the repair base, and treating the local defect surface and the wet surface of the repair base. Firstly, uniformly painting sealing paint on the upper end surface of the cleaning and repairing base. And uniformly coating the primer and the finish after the sealing paint is completely dried or at intervals of 24 hours. And after the bottom surface paint is dried or at intervals of 24 hours, uniformly brushing the surface paint. The surface paint is dried or after 24 hours, a waterproof layer is formed. And subsequently, the surface and the thickness of the waterproof layer can be checked according to the field condition, and the waterproof layer can be coated if necessary.
The sealing paint seals and repairs the upper end surface of the base, plays a role in isolation and sealing, and can adopt epoxy resin sealing paint. The primer is used to improve the adhesion of the topcoat. The topcoat is a water-repellent paint for preventing water from penetrating into the primer, for example, a polyurethane topcoat. It is understood that the waterproof layer formed by the sealer, the primer and the topcoat is an example of the waterproof layer in the embodiment of the present application, and the waterproof layer may also be formed by waterproof materials such as modified asphalt.
it can be understood that if the waterproof layer is arranged on the upper end surface of the repair base, the upper end surface of the waterproof layer is flush with the upper end surface of the base. Or the transverse gradient of the upper end surface of the waterproof layer is more than or equal to 2 percent.
In an embodiment of the present application, referring to fig. 4, before the step of casting concrete into the repair cavity to form the repair base at S04, the method for repairing includes:
And S06, cutting the exposed transverse steel bars according to the reserved length to form a second reserved end, transversely arranging second steel bars in the repair cavity, and connecting the second steel bars with the second reserved end to fix the second steel bars.
The transverse reinforcement 11 in the repair cavity is cut off by an angle grinder according to the reserved length to form a second reserved end (not shown). That is to say, according to reserve length, the interlude of the horizontal reinforcing bar of restoreing the intracavity is amputated, and the horizontal reinforcing bar of remaining reserve length is the second reservation end.
And a second reinforcing steel bar is transversely arranged in the repair cavity and is connected with the second reserved end to fix the second reinforcing steel bar. And the second reinforcing steel bar is lapped with the second reserved end, and the second reinforcing steel bar is welded with the lapping part of the second reserved end to fix the second reinforcing steel bar. Because the transverse steel bars are positioned at the inner sides of the longitudinal steel bars, when the transverse steel bars are exposed, the longitudinal steel bars are exposed inevitably, so that the second steel bars can be attached to the first steel bars tightly, and the contact parts of the first steel bars and the second steel bars are welded or tied up by adopting binding wires.
It should be understood that the steps S03 and S06 are not limited to the order of implementation, and if both the longitudinal steel bars and the transverse steel bars need to be repaired, the step S03 may be implemented first, or the step S06 may be implemented first.
In an embodiment of the present application, referring to fig. 1, 5 and 6, in S03, the step of longitudinally arranging a first steel bar in the repair cavity, where the first steel bar is connected to the first reserved end, and the step of setting the height of at least a portion of the first steel bar lower than the height of the first reserved end includes: the setting is assisted the muscle, and the one end of assisting the muscle is connected with the one end of first reinforcing bar, and the other end of assisting the muscle is connected with first reservation end, and first reinforcing bar is connected with first reservation end through assisting the muscle.
Specifically, set up auxiliary reinforcement 30, auxiliary reinforcement 30's one end and first reinforcing bar 20's one end overlap joint get up, with auxiliary reinforcement 30 and the welding of first reinforcing bar 20 overlap joint, auxiliary reinforcement 30's the other end and the first end 12a overlap joint of reserving, with auxiliary reinforcement 30 and the welding of first end 12a overlap joint of reserving, utilize auxiliary reinforcement 30 to be connected first reinforcing bar 20 and first end 12a of reserving. It can be understood that, since the height of at least a portion of the first reinforcing bars is lower than that of the first reserved end, one end of the reinforcing bar 30 is connected to one end of the first reinforcing bar 20, and the other end of the reinforcing bar 30 is connected to the first reserved end 12a, the reinforcing bar 30 has an S-shape, in which case, the first reinforcing bar may be a straight type, and the height of all the first reinforcing bars 20 is lower than that of the first reserved end 12a, that is, the entire first reinforcing bar is located below the first reserved end. Adopt the auxiliary reinforcement 30 to couple together first reinforcing bar 20 and first reservation end 12a, because the length of auxiliary reinforcement 30 is shorter than the length of first reinforcing bar 20, consequently, adjust or secondary operation, the construction of being convenient for to auxiliary reinforcement 30 according to the site operation demand easily.
in order to facilitate the connection between the first reinforcing bar 20 and the first reserved end 12a, so that the construction is easier, and the contact area of the welding position is larger, in an embodiment of the present application, please refer to fig. 5 and 6, the length of the first reserved end 12a is greater than or equal to 250 mm.
In order to make the connection between the auxiliary bar 30 and the first reserved end 12a more secure, in an embodiment of the present application, please refer to fig. 5 and 6, a connection length between the auxiliary bar 30 and the first reserved end 12a is C, where C is greater than or equal to 160mm and less than or equal to 250 mm.
In order to make the connection between the auxiliary bar 30 and the first steel bar 20 more secure, in an embodiment of the present application, please refer to fig. 5 and 6, a connection length between the auxiliary bar 30 and the first steel bar 20 is D, where D is greater than or equal to 160mm and less than or equal to 250 mm.
Another aspect of the embodiment of the present application provides a repair structure for exposed reinforcing steel bars of a ballastless track base, please refer to fig. 2, including: a first reinforcement bar 20 and a first reserved end 12a of the longitudinal reinforcement bar 12, the first reinforcement bar 20 being connected to the first reserved end 12a, at least a portion of the first reinforcement bar 20 having a height lower than the height of the first reserved end 12 a. In the repairing structure, the height of at least part of the first steel bars 20 is lower than that of the first reserved ends 12a, so that the height and the thickness of the concrete layer above the repaired first steel bars 20 meet the relevant specification requirements, the thickness of the concrete layer above the first steel bars 20 can be larger than that of the concrete layer above the longitudinal steel bars 12, and meanwhile, the height of the concrete layer above the first steel bars 20 can be equal to or smaller than that of the concrete layer above the longitudinal steel bars 12. The problem that liquid cannot be discharged along the upper end face of the repair base 200 due to the fact that the height of the concrete layer above the first steel bars 20 is too high can be solved; the problem that the concrete layer above the first steel bar 20 is easy to crack, pulverize and fall off again due to the fact that the thickness of the concrete layer above the first steel bar 20 is too thin can be avoided.
the various embodiments/implementations provided herein may be combined with each other without contradiction.
the above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A method for renovating the exposed reinforcing steel bars of a ballastless track base is characterized by comprising the following steps:
Chiseling the concrete at the periphery of the exposed reinforcing steel bars to form a repair cavity;
Cutting off the longitudinal steel bar in the repair cavity according to the reserved length to form a first reserved end;
Longitudinally arranging first reinforcing steel bars in the repair cavity, wherein the first reinforcing steel bars are connected with the first reserved end, and the height of at least part of the first reinforcing steel bars is lower than that of the first reserved end;
And pouring concrete into the repair cavity to form a repair base.
2. The method of claim 1, wherein the step of chiseling the exposed concrete around the perimeter of the rebar to form a repair cavity comprises: and chiseling concrete in the range of 0.2-0.5 m respectively in front of and behind the exposed longitudinal steel bar along the longitudinal direction.
3. the method of claim 1, wherein the repair cavity has a lateral width of 150mm to 300mm and a vertical depth of 100mm or less.
4. The method of remediating of claim 1, wherein an upper end surface of the repair base is flush with an upper end surface of the base;
Or the transverse gradient of the upper end surface of the repair base is more than or equal to 2%.
5. The method of claim 1, wherein after the step of casting concrete into the repair cavity to form a repair base, the method includes providing a waterproof layer on an upper end surface of the repair base.
6. The method according to any one of claims 1 to 5, wherein before the step of casting concrete into the repair cavity to form a repair base, the method comprises:
And cutting the exposed transverse steel bar according to the reserved length to form a second reserved end, transversely arranging a second steel bar in the repair cavity, and connecting the second steel bar with the second reserved end to fix the second steel bar.
7. The method as claimed in any one of claims 1 to 5, wherein a first reinforcing bar is longitudinally arranged in the repair chamber, the first reinforcing bar is connected with the first reserved end, and the step of making at least part of the first reinforcing bar have a height lower than that of the first reserved end comprises: the auxiliary reinforcement is arranged, one end of the auxiliary reinforcement is connected with one end of the first reinforcing steel bar, the other end of the auxiliary reinforcement is connected with the first reserved end, and the first reinforcing steel bar is connected with the first reserved end through the auxiliary reinforcement.
8. The method of claim 7, wherein the first reserved end has a length of 250mm or greater.
9. The method according to claim 8, wherein the length of the connection between the auxiliary bar and the first reserved end is C, wherein C is 160mm or less and 250mm or less.
10. The utility model provides an exposed restoration structure of ballastless track base reinforcing bar which characterized in that includes: the first steel bar and the first reserved end of the longitudinal steel bar are connected, and at least part of the first steel bar is lower than the first reserved end.
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| CN111827022A (en) * | 2020-07-09 | 2020-10-27 | 武汉比邻工程技术有限公司 | Quick maintenance method for double-block ballastless track |
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