A method for repairing damage to a ballastless track

Abstract

The application relates to the field of rail transit operation and maintenance technology, and particularly discloses a broken section repairing method for a ballastless track, which marks a broken section to form a marking area, and repairs the broken section according to the damage degree and position of the broken section of the ballastless track; when the broken section is slightly damaged, a protective material is brushed on the surface of the broken section for repairing treatment; when the broken section is moderately or severely damaged, a reinforcing bar is planted, a new isolation layer is arranged, a formwork is supported, a repairing slurry is poured, and the protective material is brushed. The application can effectively repair the broken ballastless track caused by the out-of-position construction of the isolation layer, so that the ballastless track can meet the design requirements, the influence on the safety of the ballastless track structure is avoided, and the risk of high-speed rail operation is reduced.

Description

Technical Field

[0001] This invention relates to the field of rail transit operation and maintenance technology, and more specifically, to a method for repairing damaged ballastless track. Background Technology

[0002] Ballastless track is an important component of high-speed railway systems and the basic structure that supports the operation of high-speed trains. The structural integrity and service condition of ballastless track directly affect the operating quality and driving safety of high-speed trains.

[0003] Due to poor construction quality control during the construction phase, a large number of defects and damages have appeared in the double-block ballastless track of the high-speed railway bridge section, and the number and severity of the defects are showing an increasing trend.

[0004] Due to poor construction quality control of the isolation layer between the track slab and the isolation layer, the isolation layer was not fully laid at the corners of the base plate and some corresponding corners of the track slab. After long-term use, damaged areas will appear at the corners of the base plate and some corresponding corners of the track slab. The damaged areas have a wedge-shaped structure, and some cracks even have exposed steel bars. The exposed steel bars have rusted and are gradually spreading into the interior of the ballastless track. If continued use continues, it will seriously affect the structural safety of the ballastless track in the long run, making the operation of high-speed trains risky. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method for repairing damage to ballastless tracks;

[0006] The solution adopted by this invention to solve the technical problem is:

[0007] A method for repairing damaged ballastless track involves marking the damaged area to form a marked zone, and then repairing the track according to the degree of damage and location of the damaged area.

[0008] When the damage is minor, a protective material can be applied to the surface of the damaged area for repair.

[0009] When the damage is moderate or severe, the following steps are taken: rebar installation, setting up a new isolation layer, formwork support, pouring repair grout, and applying protective materials.

[0010] In some possible implementations,

[0011] The term "minor damage" refers to a damage area where the length and width of the damaged surface are both ≤5cm and the damage depth is ≤2cm.

[0012] The term "moderate damage" specifically refers to damage to the base plate or track bed plate of the ballastless track, wherein the length and width of the damaged surface are both greater than 5cm, and the depth of the damage is greater than 2cm.

[0013] The severe damage specifically refers to damage to both the base plate and the track bed plate of the ballastless track, wherein the length and width of the damaged surface are both greater than 5cm, and the depth of the damage is greater than 2cm.

[0014] In some possible implementations,

[0015] When the base plate or track slab of ballastless track suffers moderate damage, the specific steps include:

[0016] Step A1: Remove and clean the damaged area of ​​the base plate or track bed plate, exposing the original insulating layer inside the track bed plate and base plate on the side closest to the damaged area.

[0017] Step A2: The damaged area of ​​the base plate or track bed plate has been roughened and reinforced with rebar after chiseling.

[0018] Step A3: Install a new isolation layer at the corresponding location of the damaged base plate or track bed plate, and splice the new isolation layer with the original isolation layer.

[0019] Step A4: Install templates at the damaged parts of the base plate or track bed plate;

[0020] Step A5: Pour repair grout into the damaged area of ​​the base plate or track bed slab to form the corresponding repair body;

[0021] Among them, after the damaged part of the base plate is completed, a base plate repair body is formed; after the damaged part of the track bed plate is completed, a track bed plate repair body is formed.

[0022] Step A6: Smooth the surface and apply a protective material to the outside of the restoration.

[0023] In some possible implementations, when constructing a new isolation layer, the new isolation layer is adhered to the side of the base plate repair body or track bed slab repair body closest to the isolation layer, and the new isolation layer is spliced ​​with the original isolation layer.

[0024] In some possible implementations, when severe damage occurs, the specific steps include:

[0025] Step S1: Clean the inside of the damaged area and expose the original isolation layer located between the track bed plate and the base plate on the side closest to the damaged area;

[0026] Step S2: The damaged area has been roughened by chiseling and rebar has been installed;

[0027] Step S3: Install the template at the damaged part of the base plate, pour the repair grout, and form a base plate repair body; wherein, the top surface of the base plate repair body is 1-2mm lower than the top surface of the base plate;

[0028] Step S4: Apply a new isolation layer on top of the base plate repair body, and then splice the new isolation layer with the original internal isolation layer;

[0029] Step S5: Install templates at the damaged section of the track bed slab and pour repair grout to form the base plate repair body;

[0030] Step S6: Correct and smooth the surface, and apply protective material to the outside of the repaired area of ​​the track bed plate and base plate.

[0031] In some possible implementations, when roughening the surface of the damaged area, loose material and residue are removed from the damaged area, and the exposed reinforcing bars are treated with rust prevention.

[0032] In some possible implementations, when installing rebar, the rebar is in an L-shaped structure, the installation depth is 10cm, and the spacing between two adjacent groups of rebar is 8-10cm.

[0033] In some possible implementations, step S4 specifically refers to attaching the new isolation layer to the base plate repair body and splicing the new isolation layer with the original internal isolation layer.

[0034] In some possible implementations, the new isolation layer is a geotextile with a unit area mass of 700 g / m² and a thickness of 4 mm.

[0035] In some possible implementations, the repair grout is any one of epoxy resin mortar, polymer mortar, or early-strength grout.

[0036] In some possible implementations, the thickness of the protective material is 0.3-0.8 mm, and the protective material is either a polyurethane coating or an epoxy coating, and the coating is applied at least three times.

[0037] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0038] This invention can effectively repair damage to ballastless tracks caused by inadequate construction quality of the isolation layer, enabling the ballastless tracks to meet design requirements, avoiding any impact on the structural safety of the ballastless tracks, and reducing the risks of high-speed rail operation. Attached Figure Description

[0039] Figure 1 This is a schematic diagram illustrating the application of the present invention in the repair of a base plate that has suffered moderate damage;

[0040] Figure 2 This is a schematic diagram illustrating the application of the present invention in the repair of track slabs when they suffer moderate damage;

[0041] Figure 3 This is a schematic diagram illustrating the application of the present invention in the repair of severely damaged surfaces;

[0042] The components are: 1. Track slab; 2. Base plate; 3. Bridge deck; 4. Reinforcing steel; 5. Track slab repair body; 6. New isolation layer; 7. Base plate repair body. Detailed Implementation

[0043] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "a" or "one," etc., do not indicate a quantity limitation, but rather indicate the existence of at least one. In the implementation of this application, "and / or" describes the association relationship of related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more. For example, multiple positioning posts refer to two or more positioning posts. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] The present invention will now be described in detail.

[0045] Example 1:

[0046] A method for repairing damaged ballastless track involves marking the damaged area to form a marked zone, and then repairing the track according to the degree of damage and location of the damaged area.

[0047] It should be noted that when marking, the marked area should be 5 to 10 cm larger than the actual damaged area.

[0048] When the damage is minor, meaning the length and width of the damaged area are both ≤5cm and the depth is ≤2cm, the repair method is as follows:

[0049] Use a steel shovel or grinder to remove debris and loose attachments from the concrete surface, and remove dust, oil, and other harmful substances and contaminants that are not conducive to the impregnation of protective materials, so as to ensure that the concrete surface is clean and dry and exposes the hard concrete substrate.

[0050] Repair the damaged area by applying protective material to the surface; use a roller or brush to apply the protective material so that the outer surface of the protective material is on the same surface as the concrete surface of the outer side of the base plate 2 or track bed slab 1, and the application range extends more than 10cm beyond the damaged area.

[0051] Protective materials should be applied continuously from bottom to top for no less than three coats, with each two coats applied perpendicular to each other.

[0052] When the damage is moderate or severe, the following steps are taken: rebar installation, setting up a new isolation layer, formwork support, pouring repair grout, and applying protective materials.

[0053] Furthermore, the new isolation layer 6 is a geotextile with a unit area mass of 700g / ㎡ and a thickness of 4mm;

[0054] The repair grout is any one of epoxy resin mortar, polymer mortar, or early-strength grout.

[0055] The thickness of the protective material is 0.3-0.8 mm, and the protective material is either a polyurethane coating or an epoxy coating, and it is applied at least three times.

[0056] Example 2:

[0057] like Figure 1 , Figure 2 As shown, where Figure 1 The base plate 2 of the ballastless track suffered moderate damage. Figure 2 When the track slab 1 of the ballastless track suffers moderate damage;

[0058] When the base plate 2 or track slab 1 of the ballastless track suffers moderate damage, moderate damage specifically refers to damage to the base plate 2 or track slab 1 of the ballastless track, wherein the length and width of the damaged surface are both greater than 5cm, and the depth of the damage is greater than 2cm; the specific steps include:

[0059] Step A1: Remove and clean the damaged area of ​​the base plate 2 or the track bed plate 1, so that the original isolation layer inside the track bed plate 1 and the base plate 2 is exposed on the side near the damaged area.

[0060] Specifically, tools such as electric hammers can be used to remove loose concrete from the damaged area to ensure that fresh concrete is exposed and there are no loose stones.

[0061] Step A2: The damaged area of ​​base plate 2 or track bed plate 1 has been roughened and reinforced with rebar after chiseling.

[0062] For example: use an electric hammer to roughen the original concrete surface in the repair area, and use a blower to clean the repair area to ensure that there is no floating dust or residue on the concrete base surface, and remove rust from the exposed steel bar 4; when installing the steel bar, the steel bar 4 is in an L-shaped structure, the installation depth is 10cm, and the spacing between two adjacent sets of steel bars 4 is 8-10cm.

[0063] Ribbed steel bars 4 are inserted vertically to the base surface, with a spacing of 8-10cm and a depth of 10cm. The exposed length should be such that the protective layer thickness is greater than 3cm. The tail of steel bar 4 is pre-formed into an L-shape to strengthen the connection.

[0064] Step A3: Install a new isolation layer 6 at the corresponding position of the damaged area of ​​the base plate 2 or the track bed plate 1, and splice the new isolation layer 6 with the original isolation layer; through the new isolation layer 6, and splice the new isolation layer 6 with the original isolation layer; this completely isolates the track bed plate 1 from the base plate 2;

[0065] During splicing, silicone sealant is applied to the splicing joints to ensure complete isolation between the track bed slab 1 and the base plate 2;

[0066] Specifically, when the base plate 2 is damaged, a new isolation layer 6 will be attached to the bottom of the track bed plate 1 at the position corresponding to the damage of the base plate 2, and the new isolation layer 6 will be spliced ​​with the original internal isolation layer;

[0067] When the track bed slab 1 is damaged, a new isolation layer 6 will be attached to the top surface of the base plate 2 at the position corresponding to the damage to the track bed slab 1, and the new isolation layer 6 will be spliced ​​with the original isolation layer;

[0068] Step A4: Install templates at the damaged parts of base plate 2 or track bed plate 1;

[0069] After the damaged area is repaired, a 12mm plywood board is used as a template to fix the shape, ensuring that the repaired shape is basically consistent with the original size.

[0070] Step A5: The repair grout at the damaged area of ​​the base plate 2 or the damaged area of ​​the track bed slab 1 is poured to form the corresponding repair body; wherein, after the damaged area of ​​the base plate 2 is completed, the base plate repair body 7 is formed, and after the damaged area of ​​the track bed slab 1 is completed, the track bed slab repair body 5 is formed.

[0071] Repair grout is poured into the cavity formed by the template to form the corresponding repair body; wherein, the upper surface of the base plate repair body 7 is 1-2mm lower than the original concrete surface; the bottom surface of the track bed slab repair body 5 is on the same plane as the bottom surface of the track bed slab 1.

[0072] Step A6: Correct and smooth the surface, and apply protective material to the outside of the repair body (base plate repair body 7 or track bed plate repair body 5).

[0073] Specifically, after the repair is completed, water is sprayed on the area for curing. After it is fully cured, the surface of the repair (base plate repair 7 or track bed plate repair 5) is ground smooth with an angle grinder.

[0074] The protective material is applied using a roller or brush. The application process is the same as that for minor damage and will not be described in detail here.

[0075] Furthermore, when the base plate 2 suffers moderate damage, during the rebar installation, the rebar 4 can be inserted into the base plate 2 and the bridge deck 3 used to install the base plate 2, respectively.

[0076] When the track bed slab 1 is moderately damaged, the reinforcing bar 4 should not be inserted into the track bed slab 1 during the rebar installation.

[0077] Example 3:

[0078] like Figure 3 As shown:

[0079] When severe damage occurs, severe damage specifically refers to damage to both the base plate 2 and the track bed plate 1 of the ballastless track, wherein the length and width of the damaged surface are both greater than 5cm and the depth of the damage is greater than 2cm.

[0080] Specifically, the following steps are included:

[0081] Step S1: Clean the inside of the damaged area and expose the original isolation layer located between the track bed slab 1 and the base plate 2 on the side closest to the damaged area;

[0082] Specifically, tools such as electric hammers can be used to remove loose concrete from the damaged area to ensure that fresh concrete is exposed and there are no loose stones.

[0083] Step S2: The damaged area has been roughened by chiseling and rebar has been installed;

[0084] For example: use an electric hammer to roughen the original concrete surface in the repair area to form a base surface, and use a blower to clean the repair area to ensure that there is no floating dust or residue on the concrete base surface, and remove rust from the exposed steel bar 4; when installing the steel bar, the steel bar 4 is in an L-shaped structure, the installation depth is 10cm, and the spacing between two adjacent sets of steel bars 4 is 8-10cm.

[0085] Ribbed steel bars 4 are inserted vertically to the base surface, with a spacing of 8-10cm and a depth of 10cm. The exposed length should be such that the protective layer thickness is greater than 3cm. The tail of steel bar 4 is pre-formed into an L-shape to strengthen the connection.

[0086] Step S3: Install the template at the damaged part of the base plate 2, pour the repair grout to form the base plate repair body 7, and make the top surface of the base plate repair body 7 1-2mm lower than the top surface of the base plate 2;

[0087] Step S4: Construct a new isolation layer 6 on top of the base plate repair body 7, and splice the new isolation layer 6 with the original isolation layer;

[0088] By attaching the new isolation layer 6 to the base plate repair body 7 and splicing the new isolation layer 6 with the original isolation layer, the track bed slab 1 and the base plate 2 are completely isolated.

[0089] During splicing, silicone sealant is applied to the splicing joints to ensure complete isolation between the track bed slab 1 and the base plate 2;

[0090] Step S5: Install templates at the damaged section of track slab 1 and pour repair grout to form track slab repair body 5; wherein, the bottom surface of track slab repair body 5 is on the same plane as the bottom surface of track slab 1;

[0091] Step S6: Correct and smooth the surface. Apply protective material to the outer side of the track bed slab repair body and the base plate repair body 7. The correction, smoothing and application process is the same as that in Example 2.

[0092] In the case of severe damage, by sequentially constructing the base plate repair body 7, the new isolation layer 6, and the track bed plate repair body 5, the newly constructed isolation layer 6 can be effectively supported, thereby enabling the track bed plate 1 and the base plate 2 to be completely isolated.

[0093] This invention is not limited to the specific embodiments described above. The invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A method for repairing damaged ballastless track, characterized in that, The damaged areas are marked to form marked areas, and repairs are carried out according to the degree of damage and location of the damaged parts of the ballastless track. When the damage is minor, a protective material can be applied to the surface of the damaged area for repair. When the damage is moderate or severe, the following steps are taken: rebar installation, setting up a new isolation layer, formwork support, pouring repair grout, and applying protective materials. When the base plate or track slab of ballastless track suffers moderate damage, the specific steps include: Step A1: Clean and remove the damaged area of ​​the base plate or track bed plate, exposing the original insulating layer between the track bed plate and the base plate on the side closest to the damaged area; Step A2: The damaged area of ​​the base plate or track bed plate has been roughened and reinforced with rebar after chiseling. Step A3: Install a new isolation layer at the corresponding location of the damaged base plate or track bed plate, and splice the new isolation layer with the original isolation layer. Step A4: Install templates at the damaged parts of the base plate or track bed plate; Step A5: The repair grout is poured to form the corresponding repair body at the damaged area of ​​the base plate or the track bed plate. The damaged area of ​​the base plate is repaired to form a base plate repair body, and the damaged area of ​​the track bed plate is repaired to form a track bed plate repair body. Step A6: Smooth the surface and apply a protective material to the outside of the restoration.

2. The method for repairing damaged ballastless track according to claim 1, characterized in that, The term "minor damage" refers to a damage area where the length and width of the damaged surface are both ≤5cm and the damage depth is ≤2cm. The term "moderate damage" specifically refers to damage to the base plate or track bed plate of the ballastless track, wherein the length and width of the damaged surface are both greater than 5cm, and the depth of the damage is greater than 2cm. The severe damage specifically refers to damage to both the base plate and the track bed plate of the ballastless track, wherein the length and width of the damaged surface are both greater than 5cm, and the depth of the damage is greater than 2cm.

3. The method for repairing damaged ballastless track according to claim 1, characterized in that, When constructing a new isolation layer, the new isolation layer is pasted onto the side of the base plate repair body or track bed slab repair body closest to the isolation layer, and the new isolation layer is spliced ​​with the original isolation layer.

4. The method for repairing damaged ballastless track according to claim 1, characterized in that, When severe damage occurs, the specific steps include: Step S1: Clean the inside of the damaged area, exposing the original insulating layer between the track bed plate and the base plate on the side closest to the damaged area; Step S2: The damaged area has been roughened by chiseling and rebar has been installed; Step S3: Install the template at the damaged part of the base plate, pour the repair grout to form a base plate repair body; wherein, the top surface of the base plate repair body is 1-2mm lower than the top surface of the original base plate; Step S4: Apply a new isolation layer on top of the base plate repair body and splice the new isolation layer with the original isolation layer; Step S5: Install templates at the damaged section of the track bed slab and pour repair grout to form a repaired track bed slab. Step S6: Correct and smooth the surface, and apply protective material to the outside of the repaired area of ​​the track bed plate and base plate.

5. The method for repairing damaged ballastless track according to claim 4, characterized in that, Step S4 specifically refers to attaching the new isolation layer to the base plate repair body and splicing the new isolation layer with the original isolation layer.

6. The method for repairing damaged ballastless track according to claim 4, characterized in that, When roughening the surface of the damaged area, remove the floating dust and residue, and perform rust prevention treatment on the exposed steel bars after roughening.

7. The method for repairing damaged ballastless track according to claim 4, characterized in that, When installing rebar, the rebars are L-shaped, the installation depth is 10cm, and the spacing between two adjacent groups of rebars is 8-10cm.

8. The method for repairing damaged ballastless track according to claim 4, characterized in that, The new isolation layer is a geotextile with a unit area mass of 700g / ㎡ and a thickness of 4mm.

9. A method for repairing damaged ballastless track according to claim 1, characterized in that, The thickness of the protective material is 0.3-0.8 mm, and the protective material is either a polyurethane coating or an epoxy coating, and it is applied at least three times.

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