Methods and operating systems for high-speed railway subgrade settlement repair

Abstract

The present invention discloses a method and an operating system for repairing settlement of a high-speed railway subgrade, the repair method comprising: determining a target high-speed railway subgrade section to be repaired including a plurality of base plates, and dividing the target high-speed railway subgrade section into a plurality of sections; formulating a repair work schedule, wherein the repair time schedule is divided into a plurality of preset preparation time periods and repair time periods; in the preparation time period, a plurality of lifting points are equidistantly arranged on both sides of a base plate of a section, a grouting point is respectively arranged between two adjacent lifting points, a lifting mechanism is arranged at each lifting point, and a first grouting mechanism is arranged at each grouting point; in the repair time period, the base plate of the corresponding section is lifted from a predetermined height of the high-speed railway subgrade by the lifting mechanism, and the first grouting mechanism is used to pour a first mortar into a gap formed between the base plate of the section and the high-speed railway subgrade, and each lifting mechanism is removed after the first mortar reaches the initial setting strength, thereby completing the repair work of the corresponding section.

Description

Technical Field

[0001] The present invention relates to the technical field of railway roadbed repair, and in particular to a repair method and an operation system for roadbed damage of an existing railway line. Background Art

[0002] High-speed railway is an important symbol of railway modernization and a complex system engineering. Since the opening of the first high-speed railway in my country, the Beijing-Tianjin Intercity Railway, in 2008, the current high-speed railway operating mileage has reached about 7,000 km. It is estimated that by 2020, the high-speed railway with a speed of 200 km or more will exceed 18,000 kilometers, accounting for more than half of the world's total high-speed railway mileage. The advantages of high-speed railways such as large capacity, high speed and fast speed have greatly facilitated people's travel. Only when the high-speed railway line meets high smoothness, high stability and high precision can the safety, stability and comfort of high-speed and uninterrupted operation of trains be guaranteed.

[0003] After several years of operation, the subsidence of some high-speed rail lines in my country has caused the upper base plate, track plate and rail surface to sink. For some sections with serious settlement (more than 10cm), the adjustment range of rail fasteners has reached its limit and cannot meet the current track elevation requirements. In order to ensure driving safety, some sections have to take speed limit measures, which seriously affects the operation quality of the line. To completely solve the problem, the high-speed rail base plate must be raised to the specified height, and then the filler must be filled in the cavity to eliminate the settlement and restore the track to its original elevation.

[0004] However, at present, the process of lifting the high-speed railway base plate and restoring it to the current track elevation has the defect of high construction intensity, and generally requires blocking the existing railway for construction, restricting the passage of railway vehicles, and the construction period is relatively long.

[0005] For example, Chinese patent application No. 201310382596.1 discloses a grouting and lifting rapid repair technology for sinking ballastless track. The repair technology includes grouting materials, equipment and tooling, and related construction processes and steps. The repair technology specifically uses high-pressure grouting equipment to inject a quick-setting and quick-hardening grouting material into the graded gravel at the bottom of the ballastless track bed through a grouting pipe pre-installed in the grouting hole in a certain grouting sequence and grouting rhythm under certain grouting equipment process parameters such as grouting pressure, temperature and flow. During the grouting process, a precise measuring device such as an electronic level is used to monitor the track structure elevation in real time to achieve accurate lifting of the upper structure of the ballastless track. However, the invention still has the following shortcomings or deficiencies: (1) only the gaps in the graded gravel at the bottom of the ballastless track bed as the base bed are filled and reinforced, and the gaps between the base plate and the base bed are not reinforced; (2) the grouting slurry has high temperature requirements and complex processes, which increases the difficulty of construction and prolongs the construction period.

[0006] Another example is a grouting and lifting rapid repair method for a sunken ballastless track disclosed in Chinese patent application No. 201410410235.8, which includes grouting materials, equipment and tooling, and construction technology. Specifically, after determining the lifting amount of the ballastless track, high-pressure grouting equipment is used to inject quick-setting and quick-hardening grouting materials into grouting bags that are pre-placed horizontally under the base of the ballastless track and in the surface layer of graded gravel through a grouting pipe under a certain grouting pressure in a certain order. During the grouting process, an electronic level precision measuring device is used to monitor the elevation change of the upper track structure in real time. When the design elevation is approached or reached, the grouting and lifting is stopped, and then the high-fluidity, quick-setting and quick-hardening grouting material is directly injected into the gap between the lifted base and the graded gravel layer. The grouting material is quickly filled and solidified, and the lifted base and the graded gravel layer are bonded together to achieve precise lifting and firm positioning of the ballastless track. However, the invention still has the following disadvantages or shortcomings: (1) it is necessary to place grouting bags for grouting, which has a complicated process and high construction cost; (2) the construction process is complicated and requires the use of normal railway running time.

[0007] Therefore, it has become an urgent problem to be solved in the industry to provide a high-speed railway subsidence repair method and operation system that does not occupy the railway driving space and can not only reinforce the gap between the base plate and the roadbed, but also reinforce the roadbed surface to a depth of tens of meters below the roadbed. Summary of the invention

[0008] The purpose of the present invention is to provide a high-speed railway subsidence repair method and operation system, which does not occupy the railway driving space and does not affect the normal railway driving. The subgrade is constructed through skylight points on the track during the driving interval, effectively ensuring the smooth operation of the train.

[0009] The first object of the present invention is to provide a method for repairing high-speed railway subgrade settlement, which comprises the following steps: (1) determining a target high-speed railway subgrade section to be repaired including a plurality of base plates, and dividing the target high-speed railway subgrade section into a plurality of sections based on the length of a base plate; (2) formulating a repair work schedule according to the skylight time of the target high-speed railway subgrade section, wherein the repair time schedule is divided into a plurality of cross-set preparation time periods and repair time periods, wherein the repair time period is defined as a skylight time of at least 1 hour; (3) in the preparation time period, setting a plurality of lifting points at equal intervals on both sides of the base plate of a section, and setting the lifting points at equal intervals on both sides of the base plate of the section, respectively. A grouting point is set between adjacent lifting points, and a lifting mechanism is arranged at each lifting point, and a first grouting mechanism is arranged at each grouting point; (4) During the repair period, the lifting mechanism is used to lift the base plate of the corresponding section away from the predetermined height of the high-speed railway subgrade, and the first grouting mechanism is used to pour the first mortar into the gap formed between the base plate of the section and the high-speed railway subgrade, and each lifting mechanism is removed after the first mortar reaches the initial setting strength to complete the repair work of the corresponding section; and (5) In another section adjacent to the section where the repair work is completed, steps (3) and (4) are repeated until the repair work of the entire target high-speed railway subgrade section is completed.

[0010] Preferably, in step (1), a geological radar SIR20 host and a 400MHz antenna produced by GSSI of the United States may be used to arrange survey lines on site to detect the target high-speed railway foundation section to be repaired.

[0011] Preferably, in step (3), four lifting points are equidistantly arranged on both sides of the base plate of one section.

[0012] Optionally, the first mortar includes component A and component B in a volume ratio of 1:1, wherein component A contains the following components in parts by weight: 100 parts by weight of epoxy resin, 10 to 25 parts by weight of organic acid, 0.1 to 0.5 parts by weight of catalyst, 0.1 to 0.5 parts by weight of inhibitor, and 90 to 130 parts by weight of diluent; component B contains the following components in parts by weight: 38 to 55 parts by weight of acrylic compound, 5 to 10 parts by weight of toughening agent, 6.0 to 9.0 parts by weight of initiator, and 0.5 to 1.0 parts by weight of accelerator.

[0013] Optionally, the epoxy resin is bisphenol A epoxy resin or bisphenol F epoxy resin; the organic acid is glacial acetic acid, acrylic acid or oxalic acid; the catalyst is benzyltriethylammonium chloride or tetrabutylammonium bromide; the inhibitor is 2,6-di-tert-butylhydroquinone, 2,6-dinitro-p-cresol, hydroquinone, p-tert-butylcatechol or p-hydroxyanisole; the diluent is methyl methacrylate, butyl methacrylate or trimethylolpropane triacrylate; the toughening agent is butyl rubber, butyl rubber or chloroprene rubber; the initiator is ammonium persulfate, potassium persulfate, or hydrogen peroxide; and the accelerator is sodium bisulfite, sodium sulfite, sodium thiosulfate, ferrous chloride or stannous chloride.

[0014] Optionally, before step (3), the method further includes: in a preparation time period, setting a plurality of drilling points at equal intervals along the longitudinal direction of the base plate on both sides of the base plate of a section of the target high-speed railway subgrade section, and arranging a drilling mechanism and a second grouting mechanism at each drilling point; in a repair time period, using the drilling mechanism to obliquely drill a plurality of filling holes along the longitudinal direction of the base plate, so as to obliquely insert the holes into the high-speed railway subgrade, and using the second grouting mechanism to inject a second chemical slurry into the gaps of the high-speed railway subgrade through the filling holes to fill the gaps of the high-speed railway subgrade.

[0015] Preferably, six drilling points are arranged at equal intervals along the longitudinal direction of the base plate.

[0016] Preferably, the angle of the filling hole is in the range of 40 to 50 degrees, more preferably 45 degrees.

[0017] Optionally, the second mortar includes the following components in parts by weight: 10-20 parts of sulphoaluminate cement, 10-20 parts of silicate cement, 50-80 parts of inorganic filler, 5-8 parts of expansion agent, 6-10 parts of dispersant, 0.5-1.5 parts of water reducing agent, and 1-2 parts of setting regulator.

[0018] Preferably, the inorganic filler is one or more combinations of fly ash, slag powder, talcum powder or ultrafine silica ash, and the particle size of the inorganic filler is 0.15 to 0.20 microns.

[0019] Optionally, the expansion agent is a mixture of a calcium sulfoaluminate expansion agent and a magnesium oxide expansion agent in a weight ratio of 1:1-2.

[0020] Preferably, the calcium sulfoaluminate expansion agent is prepared by grinding bauxite and limestone in a certain proportion, forming balls, calcining at high temperature, grinding and then mixing with a certain proportion of natural anhydrite. The expansion agent is a low-alkali expansion agent, and the alkali content is lower than that of calcium oxide, alunite and ordinary UEA expansion agents. The light-burned magnesium oxide expansion agent is a magnesium oxide obtained by calcining periclase or magnesite at 800-1000°C and then grinding.

[0021] Preferably, the dispersant is polyacrylamide.

[0022] Preferably, the water reducer is a polycarboxylate water reducer, a naphthalene-based high-efficiency water reducer or an aminosulfonate high-efficiency water reducer;

[0023] Preferably, the coagulant is one or more of sodium gluconate, sodium pyrophosphate or sodium sulfate.

[0024] The second object of the present invention is to provide an operating system adopting the above-mentioned high-speed railway subgrade settlement repair method, which includes: a lifting mechanism, a first grouting mechanism, a drilling mechanism, and a second grouting mechanism, wherein the lifting mechanism includes: a connecting component fixedly connected to the base plate at each lifting point, a lifting component connected to the connecting component, a hydraulic lifting component arranged between the high-speed railway subgrade and the lifting component, a hydraulic distribution device connected to each hydraulic lifting component through a hydraulic pipeline, and an automatic control device for controlling the hydraulic distribution device to provide a preset hydraulic pressure to each hydraulic lifting component to lift the base plate from a predetermined height of the high-speed railway subgrade; the first grouting mechanism is used to pour the first mortar into the gap formed between the base plate and the high-speed railway subgrade through a slurry pipeline to support the base plate after the first mortar solidifies; the drilling mechanism is used to drill a plurality of filling holes at equal intervals along the longitudinal direction of the base plate; the second grouting mechanism is used to pour the second mortar into the filling holes through the slurry pipeline to fill the gaps in the high-speed railway subgrade.

[0025] Optionally, the lifting mechanism includes ten or more connecting components and lifting components, such as twenty or thirty, and correspondingly includes ten or more hydraulic lifting components, such as twenty or thirty.

[0026] The beneficial effects of the present invention are as follows: (1) it does not occupy the railway driving space and does not affect the normal railway driving. The roadbed is constructed through the skylight points on the track during the driving interval, which effectively ensures the smooth operation of the train; (2) the preparation work of all lifting equipment and grouting equipment is completed in advance, and the location and quantity of equipment are prepared according to the divided sections, which not only ensures the safety of construction, but also effectively improves the construction speed; (3) it can achieve lifting while ensuring that the upper structure of the high-speed railway line (the ground structure above the bed) is not damaged and the integrity is not changed; (4) it can not only reinforce the gap between the base plate and the roadbed, but also reinforce the roadbed surface to a depth of tens of meters below the roadbed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A flow chart of the high-speed railway subgrade settlement repair method of the present invention is shown.

[0028] Figure 2 A schematic diagram showing the arrangement of the lifting points and grouting points of the present invention is shown.

[0029] Figure 3 A schematic structural diagram of the filling hole of the present invention is shown. DETAILED DESCRIPTION

[0030] Next, the high-speed railway subgrade settlement repair method and operation system of the present invention will be described in detail with reference to the accompanying drawings.

[0031] First, in order to speed up the construction progress, the geological radar SIR20 host and 400MHz antenna of GSSI Company of the United States were used to arrange the survey line on site to detect the specific location of the settlement of the target high-speed railway foundation section to be repaired. Figure 1 As shown, in step S1, a target high-speed railway foundation section to be repaired including a plurality of base plates is determined, and the target high-speed railway foundation section is divided into a plurality of sections based on the length of a base plate. Figure 2 For example, the target high-speed railway foundation section to be repaired includes four base plates 100, and the target high-speed railway foundation section is divided into four sections.

[0032] Next, in step S2, a repair work schedule is formulated according to the window time of the target high-speed railway base section. The repair time work table is divided into several staggered preparation time periods and repair time periods, wherein the repair time period is defined as a window time of at least 1 hour, such as 1 hour, 2 hours, or 3 hours, etc., which satisfies the work of smoothly and completely repairing one base plate, two base plates, or even three base plates.

[0033] Then, in step S3, during the preparation period, a number of lifting points are equidistantly arranged on both sides of the base plate of a section, a grouting point is arranged between two adjacent lifting points, a lifting mechanism is arranged at each lifting point, and a first grouting mechanism is arranged at each grouting point. Figure 2 As shown, in the present invention, four lifting points 200 and three grouting points 300 are equidistantly arranged on both sides of the base plate 100 of a section. During the preparation period, after the preparation work of a section is completed, the preparation work is transferred to the next section until the scheduled repair time is reached, and then the preparation work is stopped.

[0034] Then, in step S4, during the repair time period, the base plate of the corresponding section is lifted from the high-speed railway subgrade to a predetermined height using a lifting mechanism, and the first grouting mechanism is used to pour the first mortar into the gap formed between the base plate of the corresponding section and the high-speed railway subgrade. After the first mortar reaches the initial setting strength, each lifting mechanism is removed to complete the repair work of the corresponding section.

[0035] Finally, in the next preparation period, steps S3 and S4 are repeated in another section adjacent to the section where the repair work has been completed until the repair work of the entire target high-speed railway foundation section is completed.

[0036] In this non-limiting embodiment, it is suitable for the case where the settlement degree of the target high-speed railway foundation section is small and only the base plate needs to be lifted for grouting. Specifically, the entire repair work is carried out during the driving interval (i.e., the skylight time), and the work is carried out in sections with the base plate as the unit. The repair work time for each section is about 1 hour. Before repairing, the preparation work of each section is carried out first, the lifting point and the grouting point are measured and positioned in advance, and various equipment and tools are prepared in advance. The repair time can be scattered driving interval time, such as 20 minutes, 30 minutes or 45 minutes, etc., and these short skylight times are used to prepare before the repair work. After the preparation work of a section is completed, if the next skylight time is less than 1 hour, the preparation work will continue for the next section. If the next skylight time is longer than 1 hour, the section for which the preparation work has been completed can be repaired. It can be seen from this that all preparatory work can be completed before the repair period between driving intervals arrives. Once the repair period arrives, construction can be started immediately. After completing the corresponding section, corresponding preparation or repair work can be carried out on the next section.

[0037] As an alternative embodiment, in step S4, the first mortar includes component A and component B, which are mixed in a volume ratio of component A: component B = 1: 1 when used. The present invention uses G-205 polymer chemical slurry from Beijing Zhongtie Ruiwei Foundation Engineering Co., Ltd. for continuous pouring. The first mortar of the present invention has a fast solidification speed and can fill the pores fully within 20 minutes to meet the compressive strength requirements.

[0038] In this non-limiting embodiment, component A of the first mortar comprises: 100 parts by weight of epoxy resin, 10 to 25 parts by weight of organic acid, 0.1 to 0.5 parts by weight of catalyst, 0.1 to 0.5 parts by weight of inhibitor, and 90 to 130 parts by weight of diluent; component B comprises: 38 to 55 parts by weight of acrylic compound, 5 to 10 parts by weight of toughening agent, 6.0 to 9.0 parts by weight of initiator, and 0.5 to 1.0 parts by weight of accelerator. Among them, the epoxy resin is bisphenol A epoxy resin or bisphenol F epoxy resin; the organic acid is glacial acetic acid, acrylic acid or oxalic acid; the catalyst is benzyltriethylammonium chloride or tetrabutylammonium bromide; the inhibitor is 2,6-di-tert-butylhydroquinone, 2,6-dinitro-p-cresol, hydroquinone, p-tert-butylcatechol or p-hydroxyanisole; the diluent is methyl methacrylate, butyl methacrylate or trimethylolpropane triacrylate; the toughening agent is butyl rubber, butyl rubber or chloroprene rubber; the initiator is ammonium persulfate, potassium persulfate, or hydrogen peroxide; the accelerator is sodium bisulfite, sodium sulfite, sodium thiosulfate, ferrous chloride or stannous chloride.

[0039] As another alternative implementation, when it is detected that the high-speed railway subgrade has a large settlement and there are gaps inside the subgrade, it is necessary to first grout the subgrade and then lift the base plate for grouting. Specifically, before step S3, in the preparation period, six drilling points are set at equal intervals along the longitudinal direction of the base plate on both sides of the base plate 100 of a section of the target high-speed railway subgrade, and a drilling mechanism and a second grouting mechanism are arranged at each drilling point. In the repair period, six filling holes 400 (such as 400 holes) are drilled obliquely along the longitudinal direction of the base plate using the drilling mechanism. Figure 3 As shown), it is obliquely inserted into the high-speed railway foundation 500 at an angle of 45 degrees, and the second chemical slurry is poured into the gaps of the high-speed railway foundation through the filling holes by a second grouting mechanism to fill the gaps of the high-speed railway foundation.

[0040] In this non-limiting embodiment, the initial setting time of the second mortar is 5 to 10 minutes, and the glue injection strength requirement can be reached after 15 minutes. It includes the following components in parts by weight: 10 to 20 parts of sulphoaluminate cement, 10 to 20 parts of silicate cement, 50 to 80 parts of inorganic filler, 5 to 8 parts of expansion agent, 6 to 10 parts of dispersant, 0.5 to 1.5 parts of water reducer, and 1 to 2 parts of setting regulator. Among them, the inorganic filler is one or more combinations of fly ash, slag powder, talcum powder or ultrafine silica ash; the expansion agent is a mixture of calcium sulphoaluminate expansion agent and magnesium oxide expansion agent in a weight ratio of 1:1 to 2; the dispersant is polyacrylamide; the water reducer is a polycarboxylic acid water reducer, a naphthalene-based high-efficiency water reducer or an aminosulfonate high-efficiency water reducer; the setting regulator is one or more of sodium gluconate, sodium pyrophosphate or sodium sulfate.

[0041] The present invention also provides an operation system using the above-mentioned high-speed railway subgrade settlement repair method. Specifically, the operation system includes: a lifting mechanism, a first grouting mechanism, a drilling mechanism and a second grouting mechanism. Among them, the lifting mechanism includes: a connecting component fixedly connected to the base plate at each lifting point, a jacking component connected to the connecting component, a hydraulic jacking component arranged between the high-speed railway subgrade and the jacking component, a hydraulic distribution device connected to each hydraulic jacking component through a hydraulic pipeline, and an automatic control device for controlling the hydraulic distribution device to provide a preset hydraulic pressure to each hydraulic jacking component to lift the base plate to a predetermined height from the high-speed railway subgrade; the first grouting mechanism is used to pour the first mortar into the gap formed between the base plate and the high-speed railway subgrade through a slurry pipeline to support the base plate after the first mortar solidifies; the drilling mechanism is used to drill a number of filling holes at equal intervals along the longitudinal direction of the base plate; the second grouting mechanism is used to pour the second mortar into the filling holes through a slurry pipeline to fill the gaps in the high-speed railway subgrade.

[0042] Although the preferred embodiments of the present invention have been described in detail herein, it is to be understood that the present invention is not limited to the specific structures and steps described and shown in detail herein, and other variations and modifications may be implemented by those skilled in the art without departing from the spirit and scope of the present invention.

Claims

1. A high-speed railway subgrade settlement repair method, characterized in that: The following steps are involved: (1) determining a target high-speed railway foundation section to be repaired including a plurality of base plates, and dividing the target high-speed railway foundation section into a plurality of sections based on the length of one base plate; (2) formulating a repair work schedule according to the window time of the target high-speed railway section, wherein the repair work schedule includes a plurality of staggered preparation time periods and repair time periods, wherein the repair time period is defined as a window time of at least 1 hour; (3) During the preparation period, a plurality of lifting points are equidistantly arranged on both sides of the base plate of one section, a grouting point is arranged between two adjacent lifting points, a lifting mechanism is arranged at each lifting point, and a first grouting mechanism is arranged at each grouting point; (4) During the repair period, the base plate of the corresponding section is lifted from the high-speed railway foundation by the lifting mechanism to a predetermined height, and the first grouting mechanism is used to pour the first mortar into the gap formed between the base plate of the section and the high-speed railway foundation. After the first mortar reaches the initial setting strength, each lifting mechanism is removed to complete the repair work of the corresponding section; and (5) Repeat steps (3) and (4) in another section adjacent to the section where the repair work has been completed until the repair work of the entire target high-speed railway foundation section is completed; Before step (3), the method further includes: During the preparation period, a plurality of drilling points are arranged at equal intervals along the longitudinal direction of the base plate on both sides of the base plate of a section of the target high-speed railway foundation section, and a drilling mechanism and a second grouting mechanism are arranged at each drilling point; During the repair period, the drilling mechanism is used to obliquely drill a plurality of filling holes at intervals along the longitudinal direction of the base plate, so as to obliquely insert the holes into the high-speed railway foundation, and the second grouting mechanism is used to pour the second mortar into the gap of the high-speed railway foundation through the filling holes to fill the gap of the high-speed railway foundation; The second mortar includes the following components in parts by weight: 10-20 parts of sulphoaluminate cement, 10-20 parts of silicate cement, 50-80 parts of inorganic filler, 5-8 parts of expansion agent, 6-10 parts of dispersant, 0.5-1.5 parts of water reducer, and 1-2 parts of setting regulator.

2. A high-speed railway subgrade settlement repair method as claimed in claim 1, characterized in that: In step (3), four lifting points are arranged at equal intervals on both sides of the base plate of one of the sections.

3. A high-speed railway subgrade settlement repair method as claimed in claim 1, characterized in that: The first mortar comprises component A and component B in a volume ratio of 1:1, Wherein, the component A comprises the following components in parts by weight: 100 parts by weight of epoxy resin, 10 to 25 parts by weight of organic acid, 0.1 to 0.5 parts by weight of catalyst, 0.1 to 0.5 parts by weight of polymerization inhibitor, and 90 to 130 parts by weight of diluent; The B component comprises the following components in parts by weight: 38 to 55 parts by weight of an acrylic compound, 5 to 10 parts by weight of a toughening agent, 6.0 to 9.0 parts by weight of an initiator, and 0.5 to 1.0 parts by weight of an accelerator.

4. A high-speed railway subgrade settlement repair method as claimed in claim 3, characterized in that: The epoxy resin is bisphenol A epoxy resin or bisphenol F epoxy resin; the organic acid is glacial acetic acid, acrylic acid or oxalic acid; the catalyst is benzyl triethyl ammonium chloride or tetrabutyl ammonium bromide; the inhibitor is 2,6-di-tert-butylhydroquinone, 2,6-dinitro-p-cresol, hydroquinone, p-tert-butylcatechol or p-hydroxyanisole; the diluent is methyl methacrylate, butyl methacrylate or trimethylolpropane triacrylate; the toughening agent is butyl rubber, butyl rubber or chloroprene rubber; the initiator is ammonium persulfate, potassium persulfate or hydrogen peroxide; the accelerator is sodium bisulfite, sodium sulfite, sodium thiosulfate, ferrous chloride or stannous chloride.

5. The high-speed railway subgrade settlement repair method according to claim 1, characterized in that: Six drilling points are arranged at equal intervals along the longitudinal direction of the base plate.

6. The high-speed railway subgrade settlement repair method according to claim 1, characterized in that: The angle range of the filling hole is 40 to 50 degrees.

7. The high-speed railway subgrade settlement repair method according to claim 1, characterized in that: The inorganic filler is one or more combinations of fly ash, slag powder, talcum powder or ultrafine silica ash; the expansion agent is a mixture of calcium sulfoaluminate expansion agent and magnesium oxide expansion agent in a weight ratio of 1:1-2; the dispersant is polyacrylamide; the water reducer is a polycarboxylic acid water reducer, a naphthalene-based high-efficiency water reducer or an aminosulfonate high-efficiency water reducer; the setting regulator is one or more of sodium gluconate, sodium pyrophosphate or sodium sulfate.

8. An operating system using the high-speed railway subgrade settlement repair method according to claim 1, characterized in that: The operation system comprises: a lifting mechanism, a first grouting mechanism, a drilling mechanism, and a second grouting mechanism. The lifting mechanism comprises: a connecting component fixedly connected to the base plate at each lifting point, a lifting component connected to the connecting component, a hydraulic lifting component arranged between the high-speed railway foundation and the lifting component, a hydraulic distribution device connected to each of the hydraulic lifting components through a hydraulic pipeline, and an automatic control device for controlling the hydraulic distribution device to provide a preset hydraulic pressure to each of the hydraulic lifting components to lift the base plate off the high-speed railway foundation by a predetermined height; The first grouting mechanism is used to pour the first mortar into the gap formed between the base plate and the high-speed railway foundation through a slurry pipeline, so as to support the base plate after the first mortar solidifies; The drilling mechanism is used to drill a plurality of filling holes at equal intervals along the longitudinal direction of the base plate; The second grouting mechanism is used to inject the second mortar into the filling hole through a slurry pipeline to fill the gaps in the high-speed railway foundation.

Images