JP2004169381A - Method for repairing existing railway track - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of maintaining and repairing ballast and a track in a labor-saving manner by using a nozzle bit developed by the present inventor, the method intending not only to reinforce ground having a roadbed built thereon while maintaining the ballast and the track fixed to sleepers as they are, but also to reinforce the railway track by injecting cement milk into the ballast, and combining the ballast with the sleepers having the track fixed thereto, the injection of the cement milk into the ballast laid on the roadbed conventionally assumed tube difficult due to heavy pressure of the track applied to the ballast. <P>SOLUTION: According to the method, conical disk structures are formed in the ground in multiple stages along the railway track on the railway roadbed which has been compacted, by using the nozzle bit which has a desired number of injection holes formed therein. Each injection hole tilts at a downward angle θ1 with respect to an insertion direction into the ground and a lead angle θ2 in a lead angle direction with respect to a rotating direction. Then the nozzle bit is operated in the ballast laid on the roadbed similarly to the operation of forming the conical disk structures, and the permeable cement milk is force-fitted in gaps in the ballast, whereby the ballast and the sleepers having the rail firmly laid thereon are hardened in one body to obtain a foundation floor. In this manner, the foundation floor is successively extended in a railway track direction. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
In the present invention, a ballast is laid on a roadbed for constructing a railway subjected to compaction work at a predetermined height in the extension direction of the roadbed, sleepers are arranged at a predetermined interval on the ballast, and both sides of the sleepers are arranged. The present invention relates to a method for repairing an existing railway track on which rails are laid and fixed in parallel.
[0002]
[Prior art]
The above-mentioned railway track crushes a ballast laid on a roadbed or shifts a ballast by the load of a train running on a rail, and further sinks a roadbed on which a railway track is constructed together with a ballast. Upside down sleepers and rails. In order to restore the balance between the sleepers and the rails, a railway track maintenance work for restoring the balance between the sleepers and the rails by taking measures to replenish the ballast has heretofore been performed.
[0003]
On the other hand, recently, the track laid on the compacted roadbed is removed together with the ballast, and as shown in FIG. 3, the foundation floor 12 is formed on the aforementioned roadbed 11 with concrete, asphalt, and other materials. Construction work is performed, a concrete frame 13 is constructed on the foundation floor 12, a cushioning material 14 is laid in the concrete frame 13, and the cushioning material 14 is interposed, and blocks 15 of a direct connection track type are arranged. A construction method of laying the rail 16 thereon has come to be adopted.
Also, as a reinforcing means different from the above-mentioned means, not shown, as a means for reinforcing the ballast, together with the sleeper, remove the rail fixed thereto, dig up a ballast corresponding to the track width in the track laying direction, After laying glass mats, sheets, etc. in the excavated places along the direction in which sleepers are arranged, laying ballasts inside them, arranging sleepers, and surrounding sleepers with the glass mats, sheets, etc. together with ballasts Pour cement milk into the inside of the enclosure, turn the sleepers into concrete boards that are hardened together with ballasts, lay and fix the rails on the sleepers, thereby preventing ballast crushing, preventing ballast slippage, Construction methods have been developed and are being implemented to prevent imbalances.
All of these construction methods are based on the idea of strengthening the railway track, ignoring that the foundation ground of the roadbed must first be strengthened in order to prevent the imbalance of sleepers and rails.
[0004]
By the way, the load of the running train on the railway track is not applied on the sleepers constituting the railway track on average, but on both sides of the sleeper to which the rail is fixed.
In other words, a greater load is applied to both sides where the rail is fixed than to the center of the sleeper. That is, land subsidence occurs on both sides of the sleeper from the center of the sleeper.
Therefore, a larger load is applied to both sides than the center of the sleeper, and extreme crushing of ballast and displacement of ballast occur on both sides of the sleeper from the center of the sleeper, resulting in cracking of the concrete board and foundation floor. Become.
[0005]
In addition, the roadbed on which the railway was constructed is not built on the ground with the same properties over the entire length, but in some places it is built on soft ground. The roadbed that has been compacted also changes over time depending on the construction location, and there are places where the land subsidence phenomenon is likely to occur.
[0006]
In reality, the railway track that was subjected to the repair without taking these things into consideration, actually cracked the foundation floor laid on the roadbed, poured cement milk into the ballast and solidified the sleepers and ballast The fact is that cracks occur in the concrete boards that have been constructed, making it impossible to restore them, and the fact is that they are struggling to take countermeasures.
[0007]
[Problems to be solved by the invention]
As described in the section of the prior art, any of the current railway track repair methods, in carrying out the repair work, first work to remove the track laid on the roadbed, Work must be performed according to each method.
Therefore, the construction according to the above construction method is a large-scale construction.
Moreover, the above-mentioned construction method is based on the premise that the foundation ground of the roadbed on which the railway is constructed satisfies the conditions of the roadbed construction. The inconvenience as described in the section is caused.
[0008]
The present invention solves the above-mentioned inconvenience of the current railway track repair method by using a small-scale device equipped with a nozzle bit developed by the present inventor to construct a railway roadbed, ballast, and sleepers. With the track consisting of fixed rails as it is, it is laid on the roadbed under the heavy pressure of the track along with strengthening the ground where the track was built, and it is said that it is difficult to inject cement milk as it is The aim is to inject cement milk into the ballast, integrate the ballast and the railroad tie, and strengthen the railway track, thereby providing a labor-saving repair method for ballast track maintenance.
[0009]
[Means for Solving the Problems]
A desired number of holes are formed as the opening of the injection hole of the nozzle bit attached to the rod of the excavator as an obliquely downward angle θ1 with respect to the direction of insertion into the ground, and as an advance angle θ2 in the advance angle direction with respect to the rotation direction. A ballast is laid at a predetermined height in the extension direction of the roadbed on which a compacted railroad is to be constructed using the nozzle bit formed by the above, and sleepers are arranged at a predetermined interval on the extension. Then, along the both sides of the existing railroad track on which the rails were laid and fixed in parallel on both sides of the sleeper, the permeable cement milk was inserted at a predetermined depth in the ground under the roadbed while rotating at a high speed. After forming the first permeable umbrella-shaped disc-shaped structure by spraying from the injection hole of the nozzle bit, the permeable umbrella-shaped disc-shaped structure is formed while pulling out the nozzle bit to a predetermined depth. At times, the operation of adjusting the rotation speed and the amount of cement milk supply is performed to inject cement milk, and the permeable umbrella-shaped disc-shaped structure formed first and the permeable umbrella-shaped disc-shaped structure formed next are formed. The same operation as that of forming the column in the drawing hole until reaching the position where it is drawn to a predetermined depth, which is the forming point, and forming the column, and then forming the first permeable umbrella-shaped disc-shaped structure described above. To form a second-stage permeable umbrella-shaped disc-shaped structure, and after shaping this, penetrate the permeable umbrella-shaped disc-shaped structure in a multi-stage by repeating the above operation a desired number of times. After constructing the pile, the same operation was performed when the permeable umbrella-shaped disc-shaped structure was formed in the ballast laid on the roadbed, and the permeable cement milk was pressed into the ballast gap and pressed into the ballast. Ballast and Les by cement milk Renovation method of railway track of the existing constructing laying fixed sleepers Le sequentially railway track direction baseplate which solidified together.
[0010]
【Example】
The present invention is basically based on the invention of Japanese Patent No. 1784926 described in Japanese Patent Publication No. 4-72925 previously developed by the present inventor as a method for realizing the ground stabilization (hereinafter referred to as the patent method). This is an invention that utilizes a nozzle bit developed to implement the present invention.
[0011]
The outline of the above-mentioned patented invention utilized for carrying out the present invention will be described.
The configuration of the nozzle bit 1 used to carry out the above-described patented invention has a special structure shown in FIGS. 1 (a) and 1 (b).
The specific structure of the nozzle bit 1 is described in the above-mentioned patent publication in order to make the injection power of cement milk strong, "The nozzle bit 1 for forming the structure of the present invention has a jet power of cement milk. When the cement milk squirts in the ground, a sufficient amount of cement milk is forcibly pressed into the tearing area at the same time as the soil and sand tearing function to form an umbrella-shaped disc-shaped structure. By making full use of the input, it is possible to supply a sufficient pressure on the surface side of the umbrella-shaped disc-shaped structure so as to exhibit a split vein phenomenon. As shown in FIG. be one having a, wherein a is made from the ejection hole 10 in the corner theta ₁ downwards with respect to the vertical direction, and said to those having lead angle theta ₂ in the rotation direction. "configuration Have been.
[0012]
The method for stabilizing the ground according to the patent invention using the nozzle bit 1 having the above configuration is performed as follows.
First, a control mechanism having a function of inserting the nozzle bit 1 of the above-described configuration into the underground of the nozzle bit and a function of rotating the nozzle bit at a high speed under the ground, and pressure-feeding the cement milk to the nozzle bit 1 Conventionally mounted on a rod of a conventional device (not shown) provided with a supply control mechanism. By operating the apparatus, the nozzle bit 1 having the above-mentioned configuration is inserted into the ground to a predetermined depth as in the related art.
At the insertion position, while the nozzle bit 1 is rotated at a high speed in the conventional manner, a cement milk mixed with a water permeable agent (hereinafter simply referred to as a water permeable cement milk) is continuously fed to the nozzle bit 1 under pressure. The pumped water-permeable cement milk is continuously injected from the injection hole 10 of the nozzle bit 1.
This water-permeable cement milk is a cement milk for producing a water-permeable umbrella-shaped disc-shaped structure formed in the ground by the nozzle bit 1.
The amount of cement milk injected using the nozzle bit varies depending on the stratum structure at the location where the building foundation is constructed, but the water content of the soil, the porosity of the umbrella-shaped disc-shaped structure formed in the ground, etc. It is a guide to decide.
[0013]
A procedure for constructing an umbrella-type structure underground using the nozzle bit 1 will be described. Since the injection hole 10 of the nozzle bit 1 has the above-described structure, the cement milk mixed with the water-permeable agent that is continuously pumped while being rotated at a high speed in the ground has an obliquely downward inclination angle θ1, In addition, the fuel is strongly injected from the injection hole 10 formed at a lead angle θ2 with respect to the rotation direction. Since the nozzle bit 1 has the above-described structure, the jetting force exerts a strong jetting force to jet the water-permeable cement milk in a conical shape. With this powerful jetting force, the underground ground is cut into a conical shape, and permeable cement milk is pressed into the cut locations. The water-permeable cement milk pressed into the conically-sliced area consolidates the soil at the point where the water-permeable cement milk is injected, and a water-permeable umbrella-shaped disc-shaped structure obtained by kneading the underground soil. Will be modeled.
[0014]
The permeable umbrella-shaped disc-shaped structure formed by the above-described operation is formed as the following structure. That is, the water-permeable cement milk injected from the above-mentioned nozzle bit 1 is formed into a water-permeable umbrella-shaped disc-shaped structure, and the cut ground is converted into a water-permeable umbrella-shaped disc-shaped structure. Demonstrate the function of holding inside.
By the above operation, the soil buried inside the permeable umbrella-shaped disc-shaped structure formed in the ground does not find the surrounding geology that constructs the permeable umbrella-shaped disc-shaped structure, as it is Is kept in the above-mentioned permeable umbrella-shaped disc-shaped structure in a state where it is inevitably compressed to maintain the water permeability while maintaining the geological condition.
[0015]
After forming the permeable umbrella-shaped disc-shaped structure at a predetermined depth position in the ground, the supply amount of the permeable cement milk to be pumped to the nozzle bit 1 and the rotation speed of the nozzle bit 1 are adjusted. Alternatively, while the rotation of the nozzle bit 1 is stopped, water-permeable cement milk is injected, and the nozzle bit 1 is pulled up to a predetermined position in the ground while filling the insertion hole of the nozzle bit 1 with the water-permeable cement milk.
[0016]
After the nozzle bit 1 is pulled up to a predetermined position in the ground, the pulling operation is stopped, and the operation of forming the permeable umbrella-shaped disc-shaped structure is resumed at the stopped position.
[0017]
By repeating the above-mentioned operation a plurality of times, permeable umbrella-shaped disc-shaped structures are arranged in the ground in multiple stages, and these are penetrated by columns of permeable structure, and umbrella-shaped discs arranged in multiple stages are arranged. A pile having a water-permeable structure in which the soil between the umbrella-shaped structure and the umbrella-shaped disk-shaped structure is also compacted (hereinafter, the above-described structure is simply referred to as a stake) is constructed.
[0018]
Since the above-mentioned pile is constructed as the above-mentioned structure, to date, in order to improve soft ground, concrete piles driven into the ground, concrete columns formed in the ground, load-bearing functions of sand columns Not the ratio of In addition, concrete piles, concrete columns, and sand pillars, which had been adopted for improvement on the soft ground, so far, the construction method of railways, which could not be achieved by the construction method, was used to implement the above-mentioned patented invention. It was found that the constructed pile exhibited excellent running load capacity.
[0019]
The results of the present inventor performing the above-described patented invention to prevent ground subsidence in place of the conventional pile driving method will be described. The work is performed at an average of about 5 minutes per day, connecting about 8 vehicles on average, and integrally forming a permeable wall between the railway bridge and Chiba that operates at a speed of about 80 to 100 km per hour. The pile forming operation of the permeable umbrella-shaped disc-shaped structure having four layers was performed during 1 to 3 hours during the midnight train suspension period. Approximately 8400 liters of fast-setting cement milk mixed with the water-permeable agent used at that time. 70 liters were used to make one of the umbrella-shaped disc-like structures integrally formed with a water-permeable wall. The above-mentioned pile was formed along the rails of the railway track in parallel at a distance of 15 meters at intervals of 1 meter.
[0020]
It is natural that the concrete pile driven into the ground by the conventional method cannot be made into a ground reinforced by compressing and squeezing the soil without excavating the soil around the driven concrete pile. . On the other hand, a pile having an umbrella-shaped disk-shaped structure with a multi-stage structure in the ground by applying the method of carrying out the above-mentioned patented invention is an umbrella-shaped disk in which each wall of the multi-stage structure formed on the pile is integrated. Umbrella-shaped disc-shaped structure in which the wall is integrated with an umbrella-shaped disc-shaped structure in which the wall is integrated with the inside and outside of the umbrella-shaped disc-shaped structure in which the wall is integrated The soil between them is tightened. As a result, the ground around the pile is strengthened by the pile, and the ground strengthened by the pile is arranged at predetermined intervals, so that the patented invention is more effective than a concrete pile driven by the conventional method. The results show that even if the piles are short, they can function sufficiently as a measure against ground subsidence.
[0021]
It should be noted that the construction method of the above-mentioned patented invention is notable in place of the conventional method of driving a pile as a countermeasure against ground subsidence of a railway line that operates a train under the above-described conditions. However, it has been demonstrated that it has demonstrated the ability to withstand the subsidence of railway boards where vibrations with directionality due to the running of the train up and down as well as rolling occur, around the pile strengthened by the pile The formed ground functioned as an architectural foundation that would not be destroyed not only by vertical vibrations caused by train operation but also by directional vibrations caused by rolling. This means that the conventional pile driving method also exhibited functions that were not expected. Therefore, the generation of the wave due to the ground vibration is also prevented.
[0022]
The feature of the present invention is that, in performing the repair work on the existing railway track, first, in order to strengthen the foundation ground of the roadbed on which the railway track is laid, the above-described multi-stage by implementing the patented invention in the ground of the foundation ground After constructing a pile composed of a umbrella-shaped disk-shaped structure, the sleeper is formed by spraying water-permeable cement milk into a conical ballast in a ballast in which sleepers are arranged using the nozzle bit 1 according to the invention. Together with the ballast.
[0023]
That is, according to the present invention, the injection of the water-permeable cement milk from the nozzle bit 1 shown in FIG. 1 and a newly developed nozzle bit 1A shown in FIG. 2 to be described later is limited to injection into the ground of the ground on which the roadbed is constructed. It is characterized in that it involves ballast laid in the shape of a roadbed.
This is shown in FIG.
[0024]
The above-mentioned patented invention is implemented to construct a pile 24 in which umbrella-shaped disc-shaped structures 23 are arranged in a multi-stage shape in the ground of a foundation ground 22 of a roadbed 21 on which a compacted railroad is constructed.
The ballast 25 is laid on the roadbed 21 while maintaining a predetermined height. On the ballast 25, sleepers 27 to which rails 26 are fixed on both sides are laid so as to bite into the ballast 25 at predetermined intervals. Accordingly, the ballast 25 originally serves to prevent the shift of the sleeper 27 to which the rail 26 is fixed, and also exhibits a buffer function against the running pressure of the train running on the railway track. 25 is laid in a state where it is pressed against the roadbed 21 in a state where deviation is prevented by the railroad track by the sleeper 27 to which the rail 26 is fixed.
Therefore, even if an attempt is made to inject the permeable cement milk between the ballasts 25, the permeable cement milk cannot be injected into the gaps of the ballast 25 by ordinary means.
[0025]
The nozzle bit 1 used for carrying out the present invention has the above-described configuration, and as in the case where the above-mentioned patented invention is carried out, the permeable cement milk sprayed in the ground cuts the stratum. The nozzle bit 1 is pushed into the ballast 25 and rotated at a high speed, and the ballast 25 is blasted by the blasting power of the cement milk, because the blasting device exerts a function of forming an umbrella-shaped disc-shaped structure. Cement milk can be pressed into the gap. According to the present invention, by using the nozzle bit 1 having the above-described configuration, a ballast 25 can be tightened on both sides of the sleeper 27 to which the rail 26 is fixed, and the foundation roadbed 28 made of cement for fixing the sleeper 27 can be produced.
[0026]
That is, the present invention provides an umbrella-shaped disc-shaped structure composed of a cemented subbase floor 28 in which the ballast 25 is taken in at a predetermined interval and fastened to fix the sleeper 27 under both ends of the sleeper 27 constituting the railway track. This is an invention in which an object and an umbrella-shaped disk-shaped structure 24 having a multi-stage structure in which ground formed under the ground 22 on which the roadbed 21 is constructed is taken in and then tightened.
[0027]
By the way, when the existing railway track is repaired by utilizing the nozzle bit 1 used for carrying out the patented invention, the following disadvantages may occur.
That is, the nozzle bit 1 used to carry out the patented invention has only one injection hole. Therefore, the permeable cement milk sprayed from the injection hole of the nozzle bit 1 always receives a reaction force toward the opposite side of the stratum to be cut while being sprayed. Become.
When the formation is a tough clay layer from the formation and includes a mass of soil, the reaction force is large.
The injection of the permeable cement milk under the occurrence of this phenomenon does not mean that the nozzle bit 1 injects the permeable cement milk at a fixed position, but changes the injection position at all times to inject the permeable cement milk. Become.
This means that it is not possible to construct an umbrella-shaped disk-like structure having an ideal shape in the ground, or a multiple structure thereof.
[0028]
In addition, the rod equipped with the nozzle bit 1 sprays the water-permeable cement milk while the nozzle bit 1 fluctuates as described above. By rotating at a high speed while moving according to the above, the rod is rotated at a high speed while expanding the rod insertion hole. That is, the rod insertion hole becomes a large acupoint.
When this phenomenon occurs, a phenomenon occurs in which the water-permeable cement milk injected from the nozzle bit 1 in the ground is reversely injected from the rod insertion hole which has become the large acupoint.
When this phenomenon occurs, when performing the operation of constructing the above-mentioned multi-layered conical structure along the railway track, the injected permeable cement milk reversely sprays and contaminates the rails constituting the railway track. I will say.
[0029]
When the foundation ground 22 under the roadbed 21 is a formation made of tough clay or a formation containing a solid block, the nozzle bit 1 used when carrying out the patented invention is not used, and the present invention is not used. A newly developed nozzle bit 1A according to the invention previously filed as Japanese Patent Application No. 2002-325275 is used.
The configuration of the newly developed nozzle bit is such that the opening 10A of the injection hole has an angle θ1 downward with respect to the vertical direction of the nozzle bit and an advance angle θ2 with respect to the rotation direction of the nozzle bit as shown in FIG. It has a configuration in which a plurality of A's and B's are drilled in the target direction or in a three-way direction or a cross direction (not shown).
[0030]
The newly developed nozzle bit 1A has the above-described configuration. Therefore, the injection of the water-permeable cement milk from the nozzle bit 2 is always performed by the same injection force from the opening 10A of each injection hole. Become. That is, the newly developed nozzle bit 1A shown in FIG. 2 is different from the nozzle bit 1 used when carrying out the patented invention, and the water-permeable cement milk injected from each of the injection holes A 'and B' always has 1 nozzle bit. The injection is performed while suppressing the reaction force against the injection force of the water-permeable cement milk injected from the two injection holes.
[0031]
Therefore, the newly developed nozzle bit 1A shown in FIG. 2 jets the jetting direction of the water-permeable cement milk in a stable state without changing the jetting position. On the other hand, the water-permeable cement milk is sprayed without interruption, and the spraying force exerts a tearing function, thereby forming an ideal umbrella-shaped disc-shaped structure even in a stratum made of tough clay.
In addition, since the nozzle bit 1A rotates at a high speed without changing the injection position, the rod on which the nozzle bit is mounted also rotates the nozzle bit at a high speed without performing a movement for expanding the insertion hole. As a result, the insertion hole of the rod to which the nozzle bit 1A is attached is not enlarged. Therefore, it is possible to prevent the water-permeable cement milk injected from the nozzle bit in the ground from back-injecting from the enlarged insertion hole of the rod, and does not stain the periphery of the rod insertion hole.
As described above, the nozzle bit according to the invention filed earlier can exhibit the function of completely eliminating the inconvenience of the nozzle bit used when implementing the patented invention.
[0032]
【The invention's effect】
According to the present invention, the ballast 25 under both ends of the railroad tie constituting the railroad track is taken in with the sleeper 27 by a small excavator without performing large-scale construction such as removing ballasts, sleepers, and rails. A train that travels on a railway track by shaping a foundation subgrade 28 made of an umbrella-shaped disc-shaped structure to be tightened with a ground and the umbrella-shaped disc-shaped structure that takes in soil in the ground under the base and forms a multi-stage structure The ballast can be prevented from shifting and crushing due to the load of the ballast, and at the same time, the same function as a railway track constructed on a reinforced roadbed can be achieved by strengthening the foundation of the roadbed below the ballast shaped like an umbrella type disk Railway track.
Furthermore, the present invention takes advantage of the advantages of a railway track on which a ballast is laid, instead of removing the ballast on which the railroad track is laid, and provides a soft ride comfort with a ballast and vibration noise unlike a reinforced roadbed labor-saving track made of concrete or the like. Can be a labor-saving trajectory corresponding to environmental measures that have reduced environmental impact.
[Brief description of the drawings]
FIGS. 1A and 1B are conventional nozzles used for improving soft ground.
FIGS. 2A and 2B are newly developed nozzles used for improving soft ground.
FIG. 3 is a cross-sectional view when the currently employed railway track repair method is implemented.
FIG. 4 is a sectional view of a railway track embodying the present invention.
[Explanation of symbols]
21. Subbase 22. Foundation ground 23. Umbrella-shaped disc-shaped structure 24. Pile 25. Ballast 26. Rail 27. Sleepers 28. Foundation subgrade

Claims (1)

The desired number of drilling holes of the nozzle bit to be attached to the rod of the excavator are drilled at a slanting downward angle θ1 with respect to the direction of insertion into the ground, and at a leading angle θ2 with respect to the rotation direction. A ballast is laid at a predetermined height in the direction of extension of the roadbed on which a compacted railroad is to be constructed, using a nozzle bit composed of the above, and sleepers are arranged on the extension at predetermined intervals Then, along the both sides of the existing railroad track on which the rails were laid and fixed in parallel on both sides of the sleeper, the water-permeable cement milk was inserted at a predetermined depth in the ground under the roadbed and rotated at a high speed. After forming the first permeable umbrella-shaped disc-shaped structure by spraying from the injection hole of the nozzle bit, the permeable umbrella-shaped disc-shaped structure is formed while the nozzle bit is pulled out to a predetermined depth. At times, the operation of adjusting the rotation speed and the supply amount of cement milk is performed to inject the cement milk, and the permeable umbrella-shaped disc-shaped structure formed first and the permeable umbrella-shaped disc-shaped structure formed next are formed. The same operation as forming the first permeable umbrella-shaped disc-shaped structure described above after forming a pillar in a drawing hole until reaching a position where the drawing is performed to a predetermined depth, which is a forming place, and forming the pillar. To form a second-stage permeable umbrella-shaped disc-shaped structure, and after shaping it, the operation is repeated a desired number of times to penetrate the permeable umbrella-shaped disc-shaped structure in multiple stages. After constructing the pile, the same operation was performed when the permeable umbrella-shaped disc-shaped structure was formed in the ballast laid on the roadbed, and the permeable cement milk was pressed into the ballast gap and pressed into the ballast. Ballast and Les by cement milk Renovation method of railway track of existing, characterized in that to build laying fixed sleepers Le sequentially railway track direction baseplate which solidified together.

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