Crossbeam structure and method for rapid in-situ treatment of railway tunnel floor defects

Abstract

The present invention discloses a crossbeam structure and method for rapid in-situ treatment of railway tunnel floor disease, and relates to the technical field of railway tunnel floor disease treatment. The key points of the technical solution are: including multiple grouting holes at equal intervals on both sides of the track; a grouting body is arranged in the grouting hole; multiple crossbeams are arranged at equal intervals at the bottom of the track, and the crossbeams are fixed between the track and the end of the grouting body. The crossbeam structure uses the general technology of "tunnel bottom structure anchoring + crossbeam integration" to overhead fix the operating railway track without moving the original railway track, so as to facilitate the rapid treatment of railway tunnel bottom structure sinking, tunnel bottom mud and other diseases; the method is fast and efficient, can be constructed using maintenance skylights, and does not affect the normal operation of trains. It can not only accurately adjust the deviation of the track structure, but also can thoroughly treat the relevant tunnel bottom diseases in situ, and has strong applicability, especially suitable for situations where the tunnel bottom disease is large in scale and traffic interruption is not allowed, and has great practical application value.

Description

Technical Field

[0001] The invention relates to the technical field of railway tunnel floor disease treatment, and more specifically, to a beam structure and method for rapid in-situ treatment of railway tunnel floor disease. Background Art

[0002] In recent years, with the large-scale construction and operation of my country's railways, due to the combined influence of natural factors, construction quality and operating environment, and under the long-term repeated action of large axle-load train loads, coupled with groundwater erosion and hydraulic scouring effects, the fine particles in the weak interlayer of the tunnel bottom are lost, the tunnel bottom structure is hollowed out, and the concrete bottom plate is cracked and damaged, resulting in tunnel bottom sinking, mud oozing and other diseases, or the track is uplifted and deformed due to stress adjustment, which poses a serious threat to the driving safety of trains. In particular, ballastless tracks have high requirements for the quality of the lower structures such as tunnel inverts and bottom plates. Local quality defects in the tunnel bottom plate will seriously affect the overall quality of the railway project and must be thoroughly rectified to ensure the safety of railway operations.

[0003] At present, there is a lack of systematic and scientific theoretical research on the formation mechanism of railway tunnel floor diseases, and there is also a lack of mature complete technology for rapid treatment measures for railway tunnel floor diseases. In particular, for the sinking of the bottom structure of operating railway (ordinary, passenger and freight and heavy-load) tunnels, the mud and mud at the bottom of the tunnel have a great impact on the smoothness of the track, the stability of train driving, and the driving safety of trains and the durability of railway tunnels. Due to the limitations of existing railway tunnels such as short skylight time, limited operating space, harsh construction environment, and harsh speed limit conditions, higher and higher requirements are put forward for the general treatment technology of railway tunnel bottom diseases that is fast and efficient and does not affect driving.

[0004] The present invention aims to propose a set of rapid remediation methods for railway tunnel floor diseases during operation based on a systematic analysis of the characteristics of railway tunnel diseases and a large amount of engineering practice experience, which has a strong reference and guiding significance for the treatment of railway tunnel floor diseases. Summary of the invention

[0005] The purpose of the present invention is to provide a crossbeam structure and method for rapid in-situ treatment of railway tunnel floor defects. The crossbeam structure can, on the basis of not moving the original railway track, use the general technology of "tunnel bottom structure anchoring + crossbeam integration" to overhead fix the operating railway track, thereby facilitating rapid treatment of defects such as insufficient overall strength of the railway tunnel bottom, structural damage to the tunnel roadbed or invert and filling layer, bulge, sinking or slurry and mud oozing of the tunnel bottom. The method is rapid and efficient, can utilize maintenance skylights for construction, and does not affect the normal operation of trains. It can not only accurately adjust the track structure deviation, but also can thoroughly treat tunnel bottom related defects in-situ. It has strong applicability, and is particularly suitable for situations where the tunnel bottom defects are large in scale and traffic interruption is not allowed, and has great practical application value.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a beam structure for rapid in-situ remediation of railway tunnel floor defects, comprising a plurality of grouting holes located on both sides of the track and drilled at equal intervals; a grouting body formed by slurry is arranged in the grouting hole, and the top surface of the grouting body is located in the same plane as the top of the grouting hole; a plurality of beams for suspending the track line are arranged at equal intervals at the bottom of the track, the beams are fixed between the track and the end of the grouting body, and the end of the grouting body is fixedly connected to the beam.

[0007] By adopting the above technical scheme, in the process of repairing railway tunnel defects, multiple grouting holes drilled at equal intervals on both sides of the track are used to facilitate grouting and anchoring to ensure the stability of the foundation; multiple equally spaced crossbeams are used to facilitate overhead fixing of the track in the defective section of the railway tunnel floor, thereby facilitating rapid repair of the railway tunnel floor defects; the grouting body formed by the slurry injected into the grouting hole is convenient for fixing the crossbeam; the end of the grouting body is fixedly connected to the crossbeam, so as to ensure the stability of the track during the process of the crossbeam overhead track line; the method for rapid in-situ repair of railway tunnel floor defects is used. The crossbeam structure can, on the basis of not moving the original railway track, use the general technology of "tunnel bottom structure anchoring + crossbeam integration" to fix the operating railway track overhead, thereby facilitating the rapid remediation of defects such as insufficient overall strength of the railway tunnel bottom, structural damage to the tunnel roadbed or invert and filling layer, tunnel bottom uplift, sinking or mud bubbling. Maintenance skylights can be used for construction without affecting the normal operation of trains. It can not only accurately adjust the track structure deviation, but also thoroughly treat the relevant tunnel bottom defects in situ. It has strong applicability, especially for situations where the tunnel bottom defects are large in scale and traffic interruption is not allowed, and has great practical application value.

[0008] The present invention is further configured as follows: the depth of the grouting hole is greater than or equal to 2.0 m or penetrates into a relatively stable soil layer by not less than 0.3 m, and the depth of the grouting hole meets the anchoring length of the hollow grouting anchor head.

[0009] By adopting the above technical solution, the depth of the grouting hole is greater than or equal to 2.0m or penetrates into the relatively stable soil layer by not less than 0.3m, and the depth of the grouting hole meets the anchoring length of the hollow grouting anchor head, so as to ensure the anchoring stability of the grouting body formed by the slurry injected into the grouting hole.

[0010] The present invention is further configured as follows: the spacing between the grouting holes located on the same side of the track is set to 1.2 to 1.5 m.

[0011] By adopting the above technical solution, according to the situation of railway tunnel floor defects, the spacing between the grouting holes on the same side of the track is set to 1.2 to 1.5 m, so that the longitudinal spacing between the multiple beams inserted between the bottom of the track and the end of the grouting body can meet the construction needs of rectifying the railway tunnel floor defects.

[0012] The present invention is further configured as follows: the cross beam is an I25 I-beam, and the spacing between the cross beams is 1.2 to 1.5 m.

[0013] By adopting the above technical solution, the crossbeam adopts I25 I-beam, which makes the crossbeam have strong rigidity, so as to ensure the stability of the overhead fixed rail line; the spacing between the crossbeams is 1.2 to 1.5m, which is convenient for stably overhead fixing the rail line while meeting the construction needs of rapid remediation of railway tunnel floor diseases.

[0014] The present invention is further configured such that: the end of the grouting body is fixedly connected to the cross beam by an expansion bolt.

[0015] By adopting the above technical solution, the end of the grouting body and the crossbeam are fixedly connected by expansion bolts, so that the end of the grouting body and the crossbeam can be stably fixed, ensuring the stability of the crossbeam overhead fixed track and ensuring the stable fixation of the track.

[0016] The present invention is further configured as follows: a gasket for calibrating the elevation and smoothness of the track is provided between the top of the crossbeam and the bottom of the track.

[0017] By adopting the above technical solution, it is convenient to calibrate the elevation and smoothness of the track through gaskets.

[0018] A method for rapidly treating railway tunnel floor defects in situ comprises the following steps:

[0019] S1. Conduct preliminary detection and disease assessment of railway tunnel floor defects. Use advanced detection technology and computational analysis technology to conduct qualitative and quantitative assessments of the soil layer distribution, disease conditions and stability of the railway tunnel floor. Also test the elevation and smoothness of the railway track structure and evaluate track deformation.

[0020] S2, according to step S1, one of the sections of the railway tunnel floor disease section is used as a test section, and then grouting is tested on both sides of the track of the test section, and the spacing of the grouting holes drilled on both sides of the track and the longitudinal spacing of the crossbeams placed at the bottom of the track are determined according to the diffusion range of the grout in the soil layer, the working space required for the disease treatment, and the properties and scale of the disease;

[0021] S3, drilling and grouting, according to the spacing of the grouting holes determined in step S2, grouting holes are drilled at intervals on both sides of the track, and the depth of the grouting holes is greater than or equal to 2.0m or penetrates into the bedrock by not less than 0.3m, so as to ensure the stability of the foundation, and the depth of the grouting holes meets the anchoring length of the hollow grouting anchor head; then, a micro-expansive slurry is injected into the grouting holes on both sides of the track to form a grouting body;

[0022] S4. The end of the grouting body exposed from the grouting hole is chiseled flat. When the strength of the grouting body formed by the slurry injected into the grouting hole meets the requirements, the surface covering soil or surface concrete around the grouting hole is chiseled off, and the ends of the grouting body exposed from the ballast on both sides of the track are chiseled flat, and a space is reserved between the track and the exposed end of the grouting body for the placement of the crossbeam;

[0023] S5, fixing the line overhead by means of beams, fixing multiple beams in sequence between the bottom of the track and the end of the grouting body according to the longitudinal spacing described in step S2, the beams being I25 I-beams with relatively strong rigidity; then, according to the test results of the elevation and smoothness of the railway track structure in step S1, calibrating the elevation and smoothness of the track by setting gaskets at the contact between the bottom of the track and the top of the beams, so that the beams can fix and lift the track at the defective part as a whole;

[0024] S6. Remove the defects, backfill or reinforce by grouting. In the track section where the crossbeam is suspended and fixed, remove the tunnel ballast or invert and filling layer with defects, reinforce the cavities or weak positions by grouting, and construct the base concrete structure layer to connect the base concrete structure layer and the grouting filling layer into one;

[0025] S7. Backfill ballast or install track bearing blocks. For ballasted track, remove multiple beams in sequence, backfill ballast and install fixed sleepers; for ballastless track, install concrete track bearing blocks.

[0026] The present invention is further configured such that during the construction of the concrete track bearing block in step S7, the cross beam may not be removed and may be used as a rigid reinforcement in the constructed concrete track bearing block for integral casting if the elevation of the track is met.

[0027] The present invention is further configured as follows: in step S5, the cross beam and the end of the grouting body are fixed by expansion bolts.

[0028] The method is used to treat railway tunnel floor defects, making the defect treatment process fast and efficient. The repair skylight can be used for construction without affecting the normal operation of the train. Not only can the track structure deviation be accurately adjusted, but also the tunnel floor-related defects can be thoroughly treated in situ. It has strong applicability, especially when the tunnel floor defects are large in scale and traffic interruption is not allowed, and has great practical application value.

[0029] In summary, the present invention has the following beneficial effects: through multiple grouting holes drilled at equal intervals on both sides of the track, it is convenient to inject grouting anchors into the grouting holes to ensure the stability of the foundation; through multiple equal-interval crossbeams, it is convenient to overhead and fix the track of the defective section of the railway tunnel floor, so as to facilitate the rapid treatment of the railway tunnel floor disease; through the grouting body formed by the slurry injected into the grouting hole, it is convenient to fix the crossbeam; the end of the grouting body is fixedly connected to the crossbeam, so as to ensure the stability of the track during the process of the crossbeam overhead track line; through the crossbeam structure for rapid in-situ treatment of railway tunnel floor diseases, On the basis of not moving the original railway track, the general technology of "tunnel bottom structure anchoring + crossbeam integration" can be used to fix the operating railway track overhead, so as to facilitate the rapid remediation of defects such as insufficient overall strength of the railway tunnel bottom, structural damage of the tunnel roadbed or invert and filling layer, tunnel bottom uplift, sinking or mud bubbling. The maintenance skylight can be used for construction without affecting the normal operation of the train. Not only can the track structure deviation be accurately adjusted, but also the relevant tunnel bottom defects can be thoroughly treated in situ. It has strong applicability, especially suitable for situations where the tunnel bottom defects are large in scale and traffic interruption is not allowed, and has great practical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of the planar structure between the track and the beam structure in Embodiment 1 of the present invention;

[0031] Figure 2 is a schematic diagram of the cross-sectional structure between the track and the beam structure in Embodiment 1 of the present invention;

[0032] Figure 3 is a schematic diagram of the longitudinal section structure between the track and the beam structure in Embodiment 1 of the present invention;

[0033] Figure 4 is a schematic diagram of a cross-sectional structure in which a gasket is installed between the beam structure as specified in Embodiment 1 of the present invention;

[0034] Figure 5 This is a flow chart of Embodiment 2 of the present invention.

[0035] In the figure: 1. track; 2. grouting hole; 3. grouting body; 4. crossbeam; 5. expansion bolt; 6. gasket. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-5 The present invention is described in further detail.

[0037] Example 1: A crossbeam structure for rapid in-situ treatment of railway tunnel floor defects, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes a plurality of grouting holes 2 drilled at equal intervals on both sides of the track 1. Grouting bodies 3 formed by slurry are injected into the grouting holes 2, and the top surface of the grouting body 3 is located in the same plane as the top of the grouting hole 2. A plurality of cross beams 4 for suspending the line of the track 1 are placed at equal intervals at the bottom of the track 1, and the cross beams 4 are fixed between the track 1 and the end of the grouting body 3, and the end of the grouting body 3 is fixedly connected to the cross beam 4.

[0038] In this embodiment, during the process of repairing the railway tunnel defects, multiple grouting holes 2 are drilled at equal intervals on both sides of the track 1, so that grouting and anchoring can be performed in the grouting holes 2 to ensure the stability of the foundation. Multiple equally spaced crossbeams 4 are used to facilitate the overhead fixing of the track 1 in the defective section of the railway tunnel floor, thereby facilitating the rapid repair of the railway tunnel floor defects. The grouting body 3 formed by the slurry injected into the grouting hole 2 facilitates the fixing of the crossbeam 4. The end of the grouting body 3 is fixedly connected to the crossbeam 4, so that the stability of the track 1 can be ensured during the process of the crossbeam 4 overheading the track 1 line. Through the crossbeam structure for rapid in-situ treatment of railway tunnel floor defects, the operating railway track 1 can be fixed overhead by adopting the general technology of "tunnel bottom structure anchoring + crossbeam 4 integration" without moving the original railway track 1, so as to facilitate rapid treatment of defects such as insufficient overall strength of the railway tunnel bottom, structural damage of the tunnel roadbed or invert and filling layer, bulge, sinking or slurry and mud overflowing of the tunnel bottom. The maintenance skylight can be used for construction without affecting the normal operation of the train. Not only can the structural deviation of the track 1 be accurately adjusted, but also the relevant tunnel bottom defects can be thoroughly treated in-situ. It has strong applicability, especially suitable for situations where the tunnel bottom defects are large in scale and traffic interruption is not allowed, and has great practical application value.

[0039] The depth of the grouting hole 2 is greater than or equal to 2.0 m or penetrates into a relatively stable soil layer by not less than 0.3 m, and the depth of the grouting hole 2 meets the anchoring length of the hollow grouting anchor head.

[0040] In this embodiment, the depth of the grouting hole 2 is greater than or equal to 2.0m or penetrates into a relatively stable soil layer by not less than 0.3m, and the depth of the grouting hole 2 meets the anchoring length of the hollow grouting anchor head, so as to ensure the anchoring stability of the grouting body 3 formed by the slurry injected into the grouting hole 2.

[0041] The spacing between the grouting holes 2 located on the same side of the track 1 is 1.5 to 2.0 m.

[0042] In this embodiment, according to the condition of the railway tunnel floor disease, the spacing between the grouting holes 2 located on the same side of the track 1 is set to 1.2 to 1.5 m, so that the longitudinal spacing between the multiple beams 4 placed between the bottom of the track 1 and the end of the grouting body 3 can meet the construction needs of repairing the railway tunnel floor disease.

[0043] The cross beam 4 is an I25 I-beam, and the spacing between the cross beams 4 is 1.2 to 1.5 m.

[0044] In this embodiment, the cross beam 4 is made of I25 I-beam, so that the cross beam 4 has strong rigidity, which is convenient for ensuring the stability of the cross beam 4 overhead fixing the track 1 line. The spacing between the cross beams 4 is 1.2-1.5m, which is convenient for stably overhead fixing the track 1 line and also convenient for meeting the construction needs of quickly remediating the bottom plate disease of the railway tunnel.

[0045] The end of the grouting body 3 is fixedly connected to the crossbeam 4 via an expansion bolt 5 .

[0046] In this embodiment, the end of the grouting body 3 is fixedly connected to the cross beam 4 by an expansion bolt 5, so that the end of the grouting body 3 and the cross beam 4 can be stably fixed, ensuring the stability of the cross beam 4 overhead fixing the track 1 and ensuring the stable fixation of the track 1.

[0047] like Figure 4 As shown, a gasket 6 for calibrating the elevation and smoothness of the track 1 is provided between the top of the crossbeam 4 and the bottom of the track 1 .

[0048] In this embodiment, the spacer 6 is used to facilitate calibration of the elevation and smoothness of the track 1 .

[0049] Example 2: A method for rapidly treating railway tunnel floor defects in situ, such as Figure 5 As shown, the following steps are included:

[0050] S1. Conduct preliminary detection and disease assessment of railway tunnel floor defects. Use advanced detection technology and computational analysis technology to conduct qualitative and quantitative assessments of the soil layer distribution, disease conditions and stability of the railway tunnel floor, and test the elevation and smoothness of the railway track 1 structure to evaluate the deformation of track 1.

[0051] S2. According to step S1, one of the sections of the railway tunnel floor disease section is used as a test section, and then grouting is tested on both sides of the track 1 of the test section. The spacing of the grouting holes 2 drilled on both sides of the track 1 and the longitudinal spacing of the cross beams 4 placed at the bottom of the track 1 are determined based on the diffusion range of the slurry in the soil layer, the working space required for disease remediation, and the properties and scale of the disease.

[0052] S3, drilling and grouting. According to the spacing of the grouting holes 2 determined in step S2, grouting holes 2 are drilled at the spacing on both sides of the track 1, and the depth of the grouting holes 2 is greater than or equal to 2.0m or penetrates into the bedrock by not less than 0.3m to ensure the stability of the foundation, and the depth of the grouting holes 2 meets the anchoring length of the hollow grouting anchor head. Then, a micro-expandable slurry is injected into the grouting holes 2 on both sides of the track 1 to form a grouting body 3.

[0053] S4. The end of the grouting body 3 exposed from the grouting hole 2 is chiseled flat. When the strength of the grouting body 3 formed by the slurry injected into the grouting hole 2 meets the requirements, the surface covering soil or surface concrete around the grouting hole 2 is chiseled off, and the ends of the grouting body 3 exposed from the ballast on both sides of the track 1 are chiseled flat, and a space is reserved between the track 1 and the exposed end of the grouting body 3 for the placement of the crossbeam 4.

[0054] S5, overhead fixing the line through the cross beam 4. Multiple cross beams 4 are fixed in sequence between the bottom of the track 1 and the end of the grouting body 3 according to the longitudinal spacing in step S2. The cross beam 4 is an I25 I-beam with strong rigidity. Then, according to the test results of the elevation and smoothness of the railway track 1 structure in step S1, the elevation and smoothness of the track 1 are calibrated by setting a gasket 6 at the contact point between the bottom of the track 1 and the top of the cross beam 4, so that the cross beam 4 can fix and lift the track 1 at the defective part as a whole.

[0055] S6. Chisel out the defects, backfill or reinforce with grouting. In the section of track 1 where the crossbeam 4 is suspended and fixed, the tunnel ballast or invert and filling layer with defects are chiseled out, the cavities or weak positions are reinforced with grouting, and the base concrete structure layer is constructed to connect the base concrete structure layer and the grouting filling layer into one.

[0056] S7, backfill ballast or construct rail bearing blocks. For ballasted track 1, multiple beams 4 are removed in sequence, ballast is backfilled and fixed sleepers are installed. For ballastless track 1, concrete rail bearing blocks are constructed.

[0057] During the construction of the concrete rail bearing block in step S7, if the elevation of the track 1 is met, the cross beam 4 may not be removed and may be used as a rigid reinforcement in the concrete rail bearing block for integral casting.

[0058] In step S5 , the cross beam 4 and the end of the grouting body 3 are fixed by expansion bolts 5 .

[0059] The method is used to treat railway tunnel floor defects, making the defect treatment process fast and efficient. The repair skylight can be used for construction without affecting the normal operation of the train. Not only can the structural deviation of track 1 be accurately adjusted, but also the relevant tunnel floor defects can be thoroughly treated in situ. It has strong applicability, especially when the tunnel floor defects are large in scale and traffic interruption is not allowed, and has great practical application value.

[0060] Working principle: In the process of repairing railway tunnel defects, multiple grouting holes 2 drilled at equal intervals on both sides of the track 1 are used to facilitate grouting and anchoring in the grouting holes 2 to maintain the stability of the foundation. Multiple equally spaced crossbeams 4 are used to facilitate overhead fixing of the track 1 in the defective section of the railway tunnel floor, thereby facilitating rapid repair of the railway tunnel floor defect. The grouting body 3 formed by the slurry injected into the grouting hole 2 facilitates fixing the crossbeam 4. The end of the grouting body 3 is fixedly connected to the crossbeam 4, which facilitates the stability of the track 1 in the process of the crossbeam 4 overheading the track 1 line. Through the crossbeam structure for rapid in-situ treatment of railway tunnel floor defects, the operating railway track 1 can be fixed overhead by adopting the general technology of "tunnel bottom structure anchoring + crossbeam 4 integration" without moving the original railway track 1, so as to facilitate rapid treatment of defects such as insufficient overall strength of the railway tunnel bottom, structural damage of the tunnel roadbed or invert and filling layer, bulge, sinking or slurry and mud overflowing of the tunnel bottom. The maintenance skylight can be used for construction without affecting the normal operation of the train. Not only can the structural deviation of the track 1 be accurately adjusted, but also the relevant tunnel bottom defects can be thoroughly treated in-situ. It has strong applicability, especially suitable for situations where the tunnel bottom defects are large in scale and traffic interruption is not allowed, and has great practical application value.

[0061] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A crossbeam structure for rapid in-situ treatment of railway tunnel floor defects, characterized by: The invention comprises a plurality of grouting holes (2) which are located on both sides of a track (1) and drilled at equal intervals; a grouting body (3) formed of slurry is arranged in the grouting hole (2), and the top surface of the grouting body (3) and the top of the grouting hole (2) are located in the same plane; a plurality of cross beams (4) which suspend the line of the track (1) are arranged at equal intervals at the bottom of the track (1); the cross beams (4) are fixed between the track (1) and the end of the grouting body (3); the end of the grouting body (3) is fixedly connected to the cross beam (4); the end of the grouting body (3) is fixedly connected to the cross beam (4) by an expansion bolt (5); and a gasket (6) for calibrating the elevation and smoothness of the track (1) is arranged between the top of the cross beam (4) and the bottom of the track (1).

2. The crossbeam structure for rapid in-situ treatment of railway tunnel floor defects according to claim 1 is characterized by: The depth of the grouting hole (2) is greater than or equal to 2.0 m or penetrates into a relatively stable soil layer by not less than 0.3 m, and the depth of the grouting hole (2) satisfies the anchoring length of the hollow grouting anchor head.

3. The crossbeam structure for rapid in-situ treatment of railway tunnel floor defects according to claim 1 is characterized by: The spacing between the grouting holes (2) located on the same side of the track (1) is 1.5 to 2.0 m.

4. The crossbeam structure for rapid in-situ treatment of railway tunnel floor defects according to claim 1 is characterized by: The cross beam (4) is an I25 I-beam, and the spacing between the cross beams (4) is 1.5 to 2.0 m.

5. A method for rapidly treating railway tunnel floor defects in situ using the crossbeam structure of claim 1, characterized in that: The following steps are involved: S1. Conduct preliminary detection and disease assessment of railway tunnel floor defects, use advanced detection technology and computational analysis technology to conduct qualitative and quantitative assessment of the soil layer distribution, disease conditions and stability of the railway tunnel floor, and test the elevation and smoothness of the railway track (1) structure to evaluate the deformation of the track (1); S2, according to step S1, one of the sections of the railway tunnel floor defect is used as a test section, and then grouting liquid is tested on both sides of the track (1) of the test section, and the spacing of the grouting holes (2) drilled on both sides of the track (1) and the longitudinal spacing of the crossbeams (4) placed at the bottom of the track (1) are determined according to the diffusion range of the grouting liquid in the soil layer, the working space required for the disease treatment, and the properties and scale of the disease; S3, drilling and grouting, according to the spacing of the grouting holes (2) determined in step S2, grouting holes (2) are drilled at the spacing on both sides of the track (1), and the depth of the grouting holes (2) is greater than or equal to 2.0m or penetrates into the bedrock by not less than 0.3m to maintain the stability of the foundation, and the depth of the grouting holes (2) meets the anchoring length of the hollow grouting anchor head; then, a slurry with micro-expansion properties is injected into the grouting holes (2) on both sides of the track (1) to form a grouting body (3); S4, the end of the grouting body (3) exposed from the grouting hole (2) is chiseled flat, and when the strength of the grouting body (3) formed by the slurry injected into the grouting hole (2) meets the requirements, the surface covering soil or surface concrete around the grouting hole (2) is chiseled off, and the ends of the grouting body (3) exposed from the ballast on both sides of the track (1) are chiseled flat, and a space is reserved between the track (1) and the exposed ends of the grouting body (3) for the placement of the crossbeam (4); S5, fixing the line overhead by means of a crossbeam (4), fixing a plurality of crossbeams (4) in sequence between the bottom of the track (1) and the end of the grouting body (3) according to the longitudinal spacing described in step S2, wherein the crossbeam (4) is an I25 I-beam with relatively strong rigidity; then, according to the test result of the elevation and smoothness of the railway track (1) structure in step S1, calibrating the elevation and smoothness of the track (1) by setting a gasket (6) at the contact point between the bottom of the track (1) and the top of the crossbeam (4), so that the crossbeam (4) can fix and lift the track (1) at the defective part as a whole; S6, chiseling out the defects, backfilling or grouting reinforcement, in the track (1) section where the cross beam (4) is suspended and fixed, chiseling out the tunnel ballast or invert and filling layer with defects, grouting reinforcement is performed on the hollow or weak positions, and a base concrete structure layer is applied to connect the base concrete structure layer and the grouting filling layer into one; S7, backfilling ballast or installing track bearing blocks. For ballasted track (1), multiple beams (4) are removed in sequence, ballast is backfilled and fixed sleepers are installed; for ballastless track (1), concrete track bearing blocks are installed.

6. The method for rapid in-situ treatment of railway tunnel floor defects according to claim 5 is characterized by: During the construction of the concrete track bearing block in step S7, if the elevation of the track (1) is met, the crossbeam (4) may not be removed and may be used as a rigid reinforcement in the concrete track bearing block for integral casting.

7. The method for rapid in-situ treatment of railway tunnel floor defects according to claim 5 is characterized by: In step S5, the cross beam (4) and the end of the grouting body (3) are fixed by expansion bolts (5).

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