CN115710841A - Method for treating bearing layer pulverization diseases of ballastless track of operating high-speed rail - Google Patents

Abstract

The invention discloses a method for treating chalking diseases of a supporting layer of an ballastless track of an operating high-speed rail, which comprises the following steps: dividing a powdered section supporting layer into a plurality of small units along the line direction according to the distance between sleepers; polishing the exposed concrete pulverization surface layer of each small unit supporting layer by a certain thickness, wherein the polished supporting layer meets the requirement of resilience strength; cutting or chiseling a pulverized supporting layer in a certain range on the lower outer side of a ballast bed plate or a track plate until the pulverized supporting layer is flush with the surface of a polished supporting layer on an exposed surface, and cutting the outer side of the ballast bed plate into a chamfer; coating an anti-stripping agent on the surface of the support layer after cutting, chiseling and polishing, and erecting a mould on the outer side of the support layer and pouring an early-strength cement-based material; polymer mortar is used for plastering slopes on the surface of the hardened early strength cement-based material, and the outer side of the track bed slab is fully filled with the chamfer angles. The invention not only solves the problem of concrete pulverization of the exposed supporting layer in a targeted manner, but also covers the parts which are easy to pulverize and difficult to treat in a certain range outside the lower supporting layer with the ballast bed plate or the track plate, thereby improving the durability of the repairing layer.

Description

Method for treating bearing layer pulverization diseases of ballastless track of operating high-speed rail

Technical Field

The invention relates to the technical field of treatment of pulverized diseases of ballastless track supporting layers, in particular to a method for treating pulverized diseases of ballastless track supporting layers of an operating high-speed rail.

Background

The ballastless track mainly adopts a supporting layer structure on a roadbed section, the supporting layer is positioned between a surface layer of a roadbed and a track bed plate and plays a role in bearing and transmitting loads of the track bed plate and a train, the ballastless track adopts a C15 low-strength low-elasticity-modulus hydraulic material and belongs to a plain concrete structure, and the ballastless track is easy to damage in the service process due to the special material and structural design. Particularly, when the high-speed rail is in a severe cold area, repeated freezing and thawing effects cause great harm to the normal service state of a bearing layer concrete structure, and investigation finds that the pulverization phenomenon of concrete of a certain high-speed rail bearing layer is mainly manifested as surface concrete peeling, concrete pulverization, steel bar bare corrosion and the like; at present, the pulverization degree of concrete is still aggravated, the durability of a concrete structure is obviously reduced, and broken stones, fragments and the like which are pulverized and dropped by the concrete splash and smash the train, so that the train running safety is damaged.

Although scholars at home and abroad make some researches on the powdering disease treatment technology of the ballastless track supporting layer in severe cold regions and obtain certain research results, some problems still exist: (1) low construction efficiency: the treatment requirement of the remediation material on the concrete base surface is high, the workload of concrete foundation treatment is large, large-scale equipment cannot be constructed on line, and only small-scale equipment or manual treatment can be adopted; (2) the comprehensive cost is high: the concrete pulverization treatment cycle is long, the labor cost is high, and the price of the treatment material of the multi-coating system is expensive; (3) the long-acting effect of the treatment effect is poor: after the concrete is pulverized and renovated, the early effect is good, but after complete freeze-thaw cycle and high-temperature rainy season inspection, the renovation material is invalid; (4) the difficulty of repairing construction in the skylight is large: the maintenance and repair of the high-speed rail in operation need to be completed in a skylight period, the ideal repair effect needs to be achieved after 3-4 hours of operation, and the repair effect on the day cannot be influenced by the factors such as dynamic load of the high-speed train, temperature change, sunlight irradiation, rainwater, strong wind and the like.

However, although the prior patent CN211645779U discloses a durable flexible structure for treating a waterproof sealing layer of a high-speed railway foundation, which includes a protective layer, the construction method includes: cleaning the original concrete base surface, spraying a flexible treatment layer, spreading rubber chips to form an elastic isolation layer, and spreading and compacting asphalt sand to form a weather-resistant waterproof layer. But the construction process is complex, the material is complicated, and the construction method is not suitable for skylight construction; and is not suitable for dusting handling on both sides of the support layer.

The prior patent CN106320114A discloses a method for repairing concrete damage of a base plate of a high-speed railway, which includes: cleaning the base plate concrete pulverization layer, and exposing the surface of the base plate concrete; brushing an interface agent on the concrete surface of the exposed base plate, and erecting a template on the outer side of the base plate; adopting a repairing material to trowel and repair the base plate to the original design height of the base plate, and setting 3% -5% of drainage slopes; removing the original asphalt caulking materials in the expansion joint of the base plate, and sealing the expansion joint of the base plate by adopting flexible sealing materials; and filling and sealing gaps between the base plates by using a filling material. But its presence is unclear as to the extent of the disposal of the powdering layer; the interface agent cannot effectively treat concrete below the pulverized layer, cannot achieve the purpose of strengthening base concrete below the pulverized layer, only treats the exposed part, and cannot effectively repair the covered base plate.

Therefore, a method for treating the pulverization diseases of the supporting layer of the ballastless track of the high-speed rail is urgently needed.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a method for treating the pulverization disease of the support layer of the ballastless track of the operating high-speed rail, which greatly enhances the strength, compactness and durability of the support layer of the ballastless track structure and effectively improves the service performance of the support layer of the ballastless track.

The invention discloses a method for treating chalking diseases of a supporting layer of an ballastless track of an operating high-speed rail, which comprises the following steps:

s1, determining a pulverized section of a supporting layer, and dividing the supporting layer of the pulverized section into a plurality of small units along a line direction according to the distance between sleepers;

step S2, polishing the exposed concrete pulverization surface layer of the supporting layer in each small unit to a certain thickness respectively, and enabling the polished supporting layer to meet the requirement of resilience strength;

s3, cutting or chiseling the pulverized supporting layer in a certain range of the lower outer side covered by the track slab or the track slab in each small unit until the pulverized supporting layer is flush with the surface of the supporting layer polished on the exposed surface, and cutting the outer side of the track slab into a chamfer;

s4, coating a non-film-forming concrete surface anti-stripping agent on the surfaces of the cut or chiseled supporting layer and the polished supporting layer, and erecting a template with a certain height on the outer side of the supporting layer;

s5, pouring self-leveling quick-hardening early-strength cement-based materials into a pouring groove formed between the template and the track bed slab;

and S6, after the self-leveling quick-hardening early-strength cement-based material is hardened, smearing a drainage slope on the surface of the hardened early-strength cement-based material by adopting polymer mortar, and filling the outer chamfer position of the track bed board fully.

As a further improvement of the present invention, in the step S1, the plurality of small units are divided according to the powdered ground section supporting layer along the line direction according to the 3 sleeper intervals;

and the chalking damage of the supporting layer is treated as a small unit by interval crossing in a length range not exceeding 3 sleeper intervals.

As a further improvement of the present invention, in the step S2, the rebound strength is greater than 15MPa.

As a further improvement of the present invention, in the step S3, the pulverized supporting layers are cut or chiseled in a range that the supporting layers on both sides of the line are deep into the bottom of the ballast bed slab by a depth of not less than 5 cm;

the height of the cutting edge of the outer side chamfer of the ballast bed plate is not less than 8mm, and the depth of the cutting edge of the outer side chamfer of the ballast bed plate is consistent with the depth of the supporting layer cutting or chiseling deep into the ballast bed plate.

As a further improvement of the invention, in the step S4, the composition of the concrete surface antistripping agent comprises 5-30 parts of water glass or silica sol, 60-90 parts of water, 0.1-2 parts of surfactant, 0.5-5 parts of reaction retarder and 0.1-1 part of defoaming agent; the reaction retarder comprises sodium hexametaphosphate and EDTA-2Na;

the grain diameter of active ingredients in the concrete surface anti-stripping agent is not more than 200nm.

As a further improvement of the present invention, in the step S5, the self-leveling rapid-hardening early-strength cement-based material has an expansion degree of more than 260mm, and the bonding strength of the self-leveling rapid-hardening early-strength cement-based material is more than 2MPa.

As a further improvement of the invention, the self-leveling quick-hardening early-strength cement-based material comprises 350-450 parts of quick-hardening cement, 650-550 parts of sand, 0.3-0.5 part of early strength admixture, 0.5-1 part of retarder and 0.1-0.3 part of thickener.

As a further improvement of the present invention, in the step S6, the polymer mortar is a high thixotropic high toughness polymer mortar;

the high thixotropic high-toughness polymer mortar comprises 380-500 parts of quick-hardening cement, 600-500 parts of sand, 2-4 parts of fiber, 3-10 parts of fiber attapulgite and 5-10 parts of polymer emulsion or 2-5 parts of rubber powder.

As a further improvement of the invention, the drainage slope is formed by smearing polymer mortar on the surface of the hardened self-leveling quick-hardening early-strength cement-based material to two sides of the supporting layer, and the slope of the drainage slope is 4-15%.

As a further improvement of the invention, the method also comprises the following steps:

s7, on the basis of keeping the original expansion joint of the supporting layer, when the distance between the original expansion joints exceeds 5m, the expansion joints are additionally arranged, so that the distance between the expansion joints does not exceed 3 sleeper distances;

and the expansion joint is flexibly filled with polyurethane, modified asphalt or silicone.

Compared with the prior art, the invention has the following beneficial effects:

the method solves the problem of pulverization of concrete on the exposed supporting layer in a targeted manner, and covers the parts which are easy to pulverize and difficult to treat in a certain range outside the lower supporting layer with the roadbed plate or the track plate;

according to the invention, the supporting layer of the pulverized section is divided into a plurality of small units along the line direction according to the distance between sleepers, and the pulverized diseases of the supporting layer in each small unit are treated in an interval crossing manner, so that the stability of the track structure is not influenced, the small unit construction is ensured to meet the requirements of a skylight period, and a plurality of small units can be constructed simultaneously and are not influenced;

during actual construction, the required tooling equipment is small and light, is convenient for workers to carry and operate, and greatly improves the treatment efficiency of the support layer pulverization diseases.

Drawings

FIG. 1 is a schematic plane diagram of division of a support layer unit of a pulverized section disclosed in a method for treating pulverized diseases of a support layer of a ballastless track of a high-speed rail in operation according to an embodiment of the invention;

FIG. 2 is a schematic cross-sectional view of a support layer of a pulverized section disclosed in the method for treating pulverized diseases of the support layer of the ballastless track of the high-speed rail in the embodiment of the invention;

fig. 3 is a schematic diagram of a grinding range of a support layer of a pulverized section and a cutting chamfer of a track bed slab, which are disclosed by the operation of the method for treating the pulverized diseases of the support layer of the ballastless track of the high-speed rail in the embodiment of the invention;

FIG. 4 is a schematic diagram of the non-film-forming concrete surface anti-stripping agent coated and disclosed by the method for treating the powdering disease of the support layer of the ballastless track of the high-speed rail in the embodiment of the invention;

FIG. 5 is a schematic diagram of a poured self-leveling quick-hardening early-strength cement-based material disclosed by the method for treating the powdering disease of the supporting layer of the ballastless track of the high-speed rail in the embodiment of the invention;

fig. 6 is a schematic diagram of a drainage slope toe on the surface of an early strength cement-based material, which is disclosed by the method for treating the pulverization disease of the support layer of the ballastless track of the high-speed rail in the embodiment of the invention.

In the figure:

1. a road bed plate; 2. a support layer; 3. a powdering layer; 4. polishing the treatment area; 5. chamfering; 6. an anti-stripping agent for the concrete surface; 7. a template; 8. self-leveling quick-hardening early-strength cement-based material; 9. high thixotropic high toughness polymer mortar.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

The invention is described in further detail below with reference to the attached drawing figures:

aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows:

1. the construction efficiency is low, namely the freeze-thaw pulverization degree of the concrete is serious, the pulverization area is large, the treatment requirement of the remediation material on the concrete base surface is high, the workload of concrete foundation treatment is large, large-scale equipment cannot be constructed on line, and the concrete can be treated only by small-scale equipment or manpower within the skylight time;

2. the comprehensive cost is high: the concrete pulverization and remediation period is long, the labor cost is high, and the remediation materials of multi-coating systems such as acrylic acid, polyurethane, fluorocarbon and the like are expensive;

3. the long-acting effect of the treatment is poor: after the concrete is pulverized and renovated, the early effect is good, but after complete freeze-thaw cycle and high-temperature rainy season inspection, the renovation material is invalid, and the problems of cracking, breakage, falling and the like occur;

4. the repair construction difficulty in the skylight is large: the maintenance and repair of the high-speed rail in operation need to be completed in a skylight period, the ideal repair effect needs to be achieved after 3-4 hours of operation, and the repair effect on the day cannot be influenced by the factors such as dynamic load of the high-speed train, temperature change, sunlight irradiation, rainwater, strong wind and the like. Meanwhile, the repaired concrete needs to resist freeze-thaw damage and temperature deformation for a long time and also needs to keep long-term effectiveness under the high-frequency vibration action of a high-speed train. The early research results show that the existing concrete freezing and thawing damage repairing technology is difficult to be competent.

As shown in fig. 1 to 6, the invention provides a method for treating a pulverization disease of a supporting layer of an ballastless track of an operating high-speed rail, which comprises the following steps:

s1, determining a pulverization section of a supporting layer 2, and dividing the supporting layer 2 of the pulverization section into a plurality of small units along a line direction according to sleeper intervals;

as shown in fig. 1-2, a plurality of small units in the invention are divided according to the distance of 3 sleepers along the line direction of a pulverized section supporting layer 2; after division is completed, the length range not exceeding 3 sleeper intervals is used as a small unit to perform interval cross treatment on the 2 chalking diseases of the supporting layer, so that full construction tasks are guaranteed, the safety and stability of the track structure are guaranteed, meanwhile, the small unit construction meets the requirements of a skylight period, and the small units can be constructed simultaneously and do not affect each other.

During actual construction, the distance between three sleepers can be 1 small unit, for example, 6 continuous small units, the 1 st, 3 rd and 5 th small units of one skylight are constructed, and the 2 nd, 4 th and 6 th small units of the next skylight are constructed, so that the construction requirement in the skylight period is met, and the normal passing of trains is not influenced.

Step S2, polishing the concrete pulverization layer 3 exposed out of the support layer 2 in each unit to a certain thickness respectively, and enabling the polished support layer 2 to meet the requirement of resilience strength;

the method specifically comprises the following steps:

s21, polishing and removing all the exposed concrete pulverized surface layers 3 of the supporting layers 2 in each unit;

s22, when the supporting layer 2 is polished to a certain thickness, a rebound tester is used for carrying out rebound test, and if the strength of the supporting layer 2 after polishing and removal meets the requirement, namely the rebound strength of the supporting layer 2 after polishing and removal is larger than 15Mpa, polishing of the supporting layer 2 can be stopped; and if the rebound strength does not meet the requirement, continuously grinding and removing the powdering layer 3 of the supporting layer 2 until the powdering layer 3 of the supporting layer 2 is completely ground and cleaned.

S3, cutting or chiseling the pulverized supporting layer 2 in a certain range of the lower outer side of the track bed plate 1 or track plate covering in each unit to be flush with the surface of the supporting layer 2 with polished exposed surfaces, and cutting the outer side of the track bed plate 1 into a chamfer 5 to form a polishing treatment area 4, as shown in figure 3;

the method specifically comprises the following steps:

the range of cutting or chiseling the powdered supporting layers 2 is the depth of the supporting layers 2 at the two sides of the line penetrating into the bottom of the ballast bed plate 1 to be not less than 5 cm;

furthermore, the height of the cutting edge of the outer chamfer of the track bed plate 1 is not less than 8mm, and the depth of the cutting edge of the outer chamfer 5 of the track bed plate 1 is consistent with the depth of the support layer 2 cutting or chiseling deep into the track bed plate 1.

Further, the chamfer 5 in the present invention may be a bevel chamfer or an arc chamfer.

Step S4, brushing a non-film-forming concrete surface anti-stripping agent 6 on the surfaces of the cut or chiseled support layer 2 and the polished support layer 2, and erecting a template 7 with a certain height on the outer side of the support layer 2, as shown in figure 4;

the method specifically comprises the following steps:

s41, cleaning dust at the grinding position of the supporting layer 2 by using tools such as a high-pressure air gun or a hot air blower;

s42, brushing a non-film-forming concrete surface anti-stripping agent 6 on the surfaces of the cut or chiseled support layer 2 and the polished support layer 2;

furthermore, the active substances in the concrete surface antistripping agent 6 in the invention can penetrate into the supporting layer 2 concrete and generate physical or chemical reaction with the chemical substances contained in the supporting layer 2 concrete, so that the surface strength and compactness of the supporting layer 2 are enhanced in a non-film-forming state, namely the concrete surface antistripping agent 6 in the invention is not adhered to the concrete surface in a film-forming or layered form, and the influence on the bonding strength of the repair mortar can be effectively avoided.

Further, in step S42, the composition (mass ratio) of the concrete surface antistripping agent 6 includes 5 to 30 parts of water glass (sodium silicate) or silica sol (silica), 60 to 90 parts of water, 0.1 to 2 parts of a surfactant, 0.5 to 5 parts of a reaction retarder, and 0.1 to 1 part of a defoaming agent; the reaction retarder comprises sodium hexametaphosphate and EDTA-2Na;

furthermore, the particle size of active ingredients in the concrete surface anti-stripping agent 6 is not more than 200nm, the active ingredients can produce hydration products with alkali in concrete, the pores in the concrete are filled, the strength of the concrete is improved by 2MPa, the impermeability is improved by 20%, and the freeze-thaw cycle resistance of the concrete is improved by more than 50%.

Further, the height of the formwork 7 in the invention is based on the requirement of the self-leveling fast-hardening early-strength cement-based material 8 and the pouring thickness, so as to avoid the self-leveling fast-hardening early-strength cement-based material 8 from being left to the outer side of the supporting layer 2.

S5, pouring a self-leveling quick-hardening early-strength cement-based material 8 into a pouring groove formed between the template 7 and the track bed slab 1, as shown in FIG. 5;

the method specifically comprises the following steps:

s51, measuring the cleaning area and the thickness of the cut or chiseled supporting layer 2 and the polished supporting layer 2, and calculating the using amount of a pouring material of the self-leveling quick-hardening early-strength cement-based material 8;

and S52, after the anti-stripping agent 6 on the concrete surface is condensed, stirring a certain amount of the self-leveling quick-hardening early-strength cement-based material 8, and pouring the material into a pouring groove to finish pouring of the self-leveling quick-hardening early-strength cement-based material 8.

Furthermore, the expansion degree of the self-leveling quick-hardening early strength cement-based material 8 is larger than 260mm, the bonding strength of the self-leveling quick-hardening early strength cement-based material 8 is larger than 2MPa, and the self-leveling quick-hardening early strength cement-based material 8 can be polymer mortar or resin mortar.

Furthermore, the self-leveling quick-hardening early strength cement-based material 8 comprises 350-450 parts of quick-hardening cement, 650-550 parts of sand, 0.3-0.5 part of early strength admixture, 0.5-1 part of retarder and 0.1-0.3 part of thickener.

And S6, after the self-leveling quick-hardening early-strength cement-based material 8 is hardened, smearing a drainage slope on the surface of the hardened early-strength cement-based material 8 by adopting polymer mortar, and filling the position of the outer chamfer 5 of the track bed slab 1 fully, as shown in figure 6.

Further, the polymer mortar in the invention is high thixotropic high toughness polymer mortar 9;

furthermore, the drainage slope is formed by smearing slopes to two sides of the supporting layer 2 on the surface of the hardened self-leveling quick-hardening early-strength cement-based material 8 by adopting high-thixotropy high-toughness polymer mortar 9, the slope of the drainage slope is 4% -15%, and the positions of the chamfers 5 on two sides of the track bed board 1 are filled fully by the high-contact high-toughness polymer mortar 9, so that a triangular water retaining slope is formed favorably on one hand, the slope is prevented from being small or an inward reverse slope is prevented from being formed, and rainwater is accumulated on the supporting layer 2 or enters the interlayer between the supporting layer 2 and the track slab or the track bed board 1; on the other hand, the repaired new interface and the repaired old interface are positioned in the chamfer 5 at the lower part of the track bed board 1, and moisture is more difficult to enter the ballastless track along the new interface and the old interface, so that the durability of the ballastless track is improved.

Further, the high thixotropic high toughness polymer mortar 9 comprises 380-500 parts of quick hardening cement, 600-500 parts of sand, 2-4 parts of fiber, 3-10 parts of fiber attapulgite and 5-10 parts of polymer emulsion or 2-5 parts of rubber powder, and as the high thixotropic high toughness polymer mortar 9 contains the fiber or attapulgite needle-shaped fiber component, the high thixotropic high toughness polymer mortar has good shape retention capacity after pouring, and when the forming surface has a gradient of 4%, the gradient retention capacity is 100%; when the forming surface has a gradient of 15%, the gradient holding capacity is over 95%; the bonding strength after hardening is more than 2MPa, the strength in 1 hour is more than 5MPa, and the mass loss of single-side salt freezing resistance for 100 times is not more than 500g/m ² 。

S7, on the basis of keeping the original expansion joint of the supporting layer 2, when the original expansion joint distance exceeds 5m, the expansion joint is additionally arranged, so that the expansion joint distance does not exceed 3 sleeper distances;

furthermore, the expansion joint is flexibly filled with polyurethane, modified asphalt or silicone, so that reasonable rail acceptance and driving safety can be effectively ensured.

The invention has the advantages that:

the method solves the problem of concrete pulverization of the exposed supporting layer 2 in a targeted manner, and covers the ballast bed board 1 or the track board on the outer side of the lower supporting layer 2 within a certain range, so that pulverization is easy to occur and parts which are difficult to treat are treated together;

according to the invention, the pulverized section supporting layer is divided into a plurality of small units along the line direction according to the distance between sleepers, and the pulverized diseases of the supporting layer 2 in each small unit are treated in an interval crossing manner, so that the stability of the track structure is not influenced, the small unit construction is ensured to meet the requirements of a skylight period, and a plurality of small units can be constructed simultaneously and are not influenced;

during actual construction, the required tooling equipment is small and light, is convenient for workers to carry and operate, and greatly improves the treatment efficiency of the support layer pulverization diseases.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A method for treating pulverization diseases of a supporting layer of an ballastless track of an operating high-speed rail is characterized by comprising the following steps:

s1, determining a pulverized section of a supporting layer, and dividing the supporting layer of the pulverized section into a plurality of small units along a line direction according to the distance between sleepers;

s2, polishing the concrete pulverization surface layer exposed out of the support layer in each small unit to a certain thickness respectively, and enabling the polished support layer to meet the requirement of resilience strength;

s3, cutting or chiseling the pulverized supporting layer in a certain range of the lower outer side covered by the track slab or the track slab in each small unit until the pulverized supporting layer is flush with the surface of the supporting layer polished on the exposed surface, and cutting the outer side of the track slab into a chamfer;

s4, coating a non-film-forming concrete surface anti-stripping agent on the surfaces of the cut or chiseled supporting layer and the polished supporting layer, and erecting a template with a certain height on the outer side of the supporting layer;

s5, pouring self-leveling quick-hardening early-strength cement-based materials into a pouring groove formed between the template and the track bed slab;

and S6, after the self-leveling quick-hardening early-strength cement-based material is hardened, smearing a drainage slope on the surface of the hardened early-strength cement-based material by adopting polymer mortar, and filling the outer chamfer position of the track bed board fully.

2. The treatment method for the pulverized disease of the supporting layer of the ballastless track of the operating high-speed rail according to claim 1, wherein in the step S1, the plurality of small units are divided according to the pulverized section supporting layer along the line direction according to the interval of 3 sleepers;

and the chalking damage of the supporting layer is treated as a small unit by interval crossing in a length range not exceeding 3 sleeper intervals.

3. The method for treating pulverized disease of supporting layer of ballastless track of operating high-speed railway of claim 1, wherein in step S2, the resilience strength is greater than 15MPa.

4. The method for treating pulverized diseases of supporting layers of ballastless tracks of operating high-speed rails according to claim 1, wherein in the step S3, the pulverized supporting layers are cut or chiseled in a range that the supporting layers on both sides of the line penetrate into the bottom of the ballast bed plate to a depth of not less than 5 cm;

the height of the cutting edge of the outer side chamfer of the ballast bed plate is not less than 8mm, and the depth of the cutting edge of the outer side chamfer of the ballast bed plate is consistent with the depth of the supporting layer cutting or chiseling deep into the ballast bed plate.

5. The method for treating the chalking disease of the supporting layer of the ballastless track of the operating high-speed rail as claimed in claim 1, wherein in the step S4, the composition of the concrete surface anti-stripping agent comprises 5-30 parts of water glass or silica sol, 60-90 parts of water, 0.1-2 parts of surfactant, 0.5-5 parts of reaction retarder and 0.1-1 part of defoaming agent; the reaction retarder comprises sodium hexametaphosphate and EDTA-2Na;

the grain diameter of active ingredients in the concrete surface anti-stripping agent is not more than 200nm.

6. The method for treating the powdering disease of the supporting layer of the ballastless track of the operating high-speed rail according to claim 1, wherein in the step S5, the expansibility of the self-leveling rapid-hardening early-strength cement-based material is greater than 260mm, and the bonding strength of the self-leveling rapid-hardening early-strength cement-based material is greater than 2MPa.

7. The method for treating the pulverization disease of the supporting layer of the ballastless track of the operating high-speed rail as claimed in claim 6, wherein the self-leveling quick-hardening early-strength cement-based material comprises 350-450 parts of quick-hardening cement, 650-550 parts of sand, 0.3-0.5 part of early strength admixture, 0.5-1 part of retarder and 0.1-0.3 part of thickener.

8. The method for treating chalking disease of the supporting layer of the ballastless track of the operating high-speed rail as recited in claim 1, wherein in the step S6, the polymer mortar is high thixotropic high-toughness polymer mortar;

the high thixotropic high-toughness polymer mortar comprises 380-500 parts of quick-hardening cement, 600-500 parts of sand, 2-4 parts of fiber, 3-10 parts of fiber attapulgite and 5-10 parts of polymer emulsion or 2-5 parts of rubber powder.

9. The method for treating the chalking disease of the supporting layer of the ballastless track of the operating high-speed rail according to claim 1, wherein the drainage slope is formed by smearing polymer mortar on the surface of the hardened self-leveling quick-hardening early-strength cement-based material to two sides of the supporting layer, and the slope of the drainage slope is 4% -15%.

10. The method for treating the chalking disease of the support layer of the ballastless track of the operating high-speed rail according to claim 1, further comprising:

s7, on the basis of keeping the original expansion joint of the supporting layer, when the distance between the original expansion joints exceeds 5m, the expansion joints are additionally arranged, so that the distance between the expansion joints does not exceed 3 sleeper distances;

and the expansion joint is flexibly filled with polyurethane, modified asphalt or silicone.

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