Grouting system for undercrossing railway

Abstract

The utility model relates to a grouting system for undercrossing a railway, the grouting system for undercrossing the railway comprises a first grouting assembly, a second grouting assembly and a plurality of monitors, the first grouting assembly comprises a plurality of inclined sleeve-entering valve pipes, and the inclined sleeve-entering valve pipes are distributed on the two opposite sides of the railway in the first direction; the first grouting assembly comprises a supporting pipe fitting and a plurality of pipe fitting sleeve valve pipes, the supporting pipe fitting is arranged on one side of the railway underground soil layer in a penetrating mode in the first direction, the plurality of pipe fitting sleeve valve pipes are arranged on the side wall of the supporting pipe fitting, and the plurality of pipe fitting sleeve valve pipes are arranged on the side wall of the supporting pipe fitting. The multiple pipe sleeve valve pipes are annularly arranged on the peripheral side of the supporting pipe and form a second grouting area, the monitors are arranged on the side, in the first direction, of the railway, the multiple monitors are distributed in the extending direction of the railway at intervals, and the first direction intersects with the extending direction of the railway. According to the method, the adverse effect on the existing operation railway foundation in the construction process can be reduced, and the subway construction safety is improved.

Description

Technical Field

[0001] The present application relates to the technical field of underground space construction, and in particular to a grouting system for underpasses of railways. Background Art

[0002] With the rapid development of urban rail transit, subway construction usually needs to pass under existing operating railways (railway lines that have been built and put into use) around the city. In order to reduce the impact on existing operating railways, the construction of subway tunnels crossing existing operating railways has very high requirements.

[0003] However, the subway construction technology used in related techniques cannot meet the need to protect the railway when crossing the existing operating railway, and the protection measures for the existing operating railway need to be strengthened during the construction process. Summary of the invention

[0004] Based on this, it is necessary to provide a grouting system for underpasses, so as to improve the strength of existing operating railways, reduce the adverse effects of the construction process on the foundation of existing operating railways, and improve the safety of subway construction.

[0005] According to one aspect of the present application, a grouting system for underpass railway is provided, and the grouting system for underpass railway comprises:

[0006] A first grouting assembly includes a plurality of oblique sleeve valve pipes, the plurality of oblique sleeve valve pipes are distributed on opposite sides of the railway along a first direction, and the oblique sleeve valve pipes extend into a first grouting area located in an underground soil layer of the railway to inject grout into the first grouting area;

[0007] A second grouting assembly includes a supporting pipe and a pipe sleeve valve pipe, wherein the supporting pipe is inserted into the underground soil layer of the railway along the first direction, a plurality of the pipe sleeve valve pipes are arranged on the side wall of the supporting pipe, and the plurality of the pipe sleeve valve pipes are arranged around the supporting pipe to form a second grouting area; and

[0008] A plurality of monitoring devices, wherein the monitoring devices are arranged on one side of the railway along the first direction, and the plurality of monitoring devices are distributed at intervals along the extension direction of the railway;

[0009] Wherein, the first direction intersects with the extension direction of the railway.

[0010] In one embodiment, the dimension L of the first grouting area along the first direction satisfies: 52.9m≤L≤74.9m; the dimension W along the extension direction of the railway satisfies: 46.7m≤W≤70.5m, the dimension H along the second direction is 30.92m, and the first grouting area is 3m away from the side of the railway along the second direction from the support pipe;

[0011] Wherein, the first direction, the second direction and the extending direction of the railway intersect pairwise.

[0012] In one embodiment, the second grouting area is outside the support pipe fitting and within a range of 3 m from the outer side wall of the support pipe fitting.

[0013] In one embodiment, along the first direction and in the direction pointing from the middle of the railway to the edge, all the inclined sleeve valve pipes form a plurality of sequentially arranged inclined sleeve valve pipe groups. Each sleeve valve pipe group includes a plurality of first inclined sleeve valve pipes and a plurality of second inclined sleeve valve pipes. The plurality of first inclined sleeve valve pipes and the plurality of second inclined sleeve valve pipes are alternately arranged along the extending direction of the railway;

[0014] The included angle N1 between the extending direction of the first inclined sleeve valve pipe and the ground where the railway is located satisfies: 15° ≤ N1 ≤ 45°, and the included angle N2 between the extending direction of the second inclined sleeve valve pipe and the ground where the railway is located satisfies: 50° ≤ N2 ≤ 80°.

[0015] In one embodiment, along the first direction, the plurality of first inclined sleeve valve pipes of the plurality of inclined sleeve valve pipe groups are evenly spaced from each other, and along the first direction, the plurality of second inclined sleeve valve pipes of the plurality of inclined sleeve valve pipe groups are evenly spaced from each other.

[0016] In one embodiment, the support pipe fitting includes a plurality of pipe segment ring groups sequentially connected along the first direction. Each pipe segment ring group includes a plurality of mounting blocks. The plurality of mounting blocks are sequentially connected end to end around an axis parallel to the first direction to form the pipe segment ring group. Along the direction from the center of the pipe segment ring group to the circumference, at least one through hole is provided on each mounting block. The through hole is configured to be able to be used for hoisting the mounting block and for the pipe fitting sleeve valve pipe to pass through.

[0017] In one embodiment, the plurality of mounting blocks include three standard blocks, two connecting blocks and one capping block that are sequentially connected end to end around an axis parallel to the first direction;

[0018] Along the direction from the center of the pipe segment ring group to the circumference, three through holes are provided on the standard block, three through holes are provided on the connecting block, and one through hole is provided on the capping block.

[0019] In one embodiment, the distance X between two adjacent monitors satisfies: 10 m ≤ X ≤ 15 m.

[0020] In one embodiment, the plurality of monitors include a plurality of first monitors and a plurality of second monitors, the plurality of first monitors are arranged at intervals along the extension direction of the railway, and the distance X1 between two adjacent first monitors is 10m, and the plurality of second monitors are respectively arranged on both sides of the plurality of first monitors along the extension direction of the railway, and the distance X1 between two adjacent second monitors is 15m.

[0021] In one embodiment, the grouting system under the railway further includes a column monitor and a water level monitor, wherein the column monitor is arranged on the contact network columns around the railway to monitor the settlement, displacement and inclination of the contact network columns;

[0022] The water level monitor is arranged in the underground soil layer around the railway and is used to monitor the underground water level.

[0023] The grouting system for underpass railway of the present application forms the first grouting area and the second grouting area respectively through the first grouting assembly and the second grouting assembly, performs double reinforcement protection on the railway, and monitors the railway in real time through multiple monitoring instruments, thereby improving the controllability of railway safety. That is, the present application can improve the strength of existing operating railways, reduce the adverse effects of the construction process on the foundation of existing operating railways, and improve the safety of subway construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of a grouting system for underpass of a railway in one embodiment of the present application.

[0025] Figure 2 It is a side cross-sectional view of a grouting system for passing under a railway according to an embodiment of the present application.

[0026] Figure 3 It is a side sectional view of the second grouting assembly in one embodiment of the present application.

[0027] Figure 4 It is a schematic diagram of the distribution of monitoring instruments in one embodiment of the present application.

[0028] Description of Figure Numbers:

[0029] 10. Grouting system under the railway;

[0030] 100, first grouting assembly; 110, first grouting area; 120, oblique sleeve valve pipe group; 121, first oblique sleeve valve pipe; 122, second oblique sleeve valve pipe;

[0031] 200, second grouting assembly; 210, supporting pipe fittings; 211, segment ring assembly; 212, standard block; 213, connecting block; 214, capping block; 220, pipe fitting sleeve valve pipe; 230, second grouting area;

[0032] 300, Monitoring component; 310, Monitor; 311, First monitor; 312, Second monitor; 320, Column monitor; 330, Catenary column

[0033] 20, Tunnel; 30, Railway

[0034] F1, First direction; F2, Second direction Detailed implementation manners

[0035] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0036] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present application.

[0037] In addition, if these terms "first" and "second" appear, these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0038] In this application, unless otherwise clearly defined and limited, if terms such as "installed", "connected", "linked", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] In this application, unless otherwise clearly defined and limited, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath", and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0040] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0041] With the rapid development of urban construction, urban rail transit has greatly shortened the commuting time of citizens in the city, and to some extent, shortened the spatial distance of the city, accelerating the construction of urban integration. The construction of subways is gradually showing a trend of expanding from the central city to the suburbs, and subway tunnels will pass under the existing operating railways (railway lines that have been built and put into use) around the city. The environment around the existing operating railways in the suburbs is complex, and when the tunnel passes under the subgrade of the existing operating railway, relevant measures often need to be taken to protect the subgrade, rails, etc. of the existing operating railway.

[0042] At the same time, the construction of subway tunnels crossing existing operating railways has high requirements. The operation requires that the settlement of the rail surface of the existing operating railway does not exceed 5 mm. Secondly, the relevant approval procedures and processes for subway construction involving existing operating railways are cumbersome, and the time and economic costs are relatively high. A safe and reliable protection measure for existing operating railways is needed to ensure that the subway tunnel can pass through safely.

[0043] Based on this, the present application provides a grouting system for underpasses, which can improve the strength of existing operating railways, facilitate the safe crossing of subway tunnels through existing operating railways, and perform protective construction on the roadbed of existing operating railways before a shield tunnel (a tunnel constructed using a shield machine) passes under the existing operating railway, thereby reducing the adverse effects of the construction process on the foundation of the existing operating railway, and enabling timely reinforcement during the shield crossing process to ensure the safety of shield subway construction.

[0044] See also Figure 1 As shown, Figure 1 The schematic diagram of the structure of the grouting system 10 for underpass railway in one embodiment of the present application. The grouting system 10 for underpass railway provided by the present application comprises a first grouting assembly 100, a second grouting assembly 200 and a plurality of monitoring instruments 310, wherein the first grouting assembly 100 comprises a plurality of oblique sleeve valve pipes, which are distributed on opposite sides of the railway 30 along a first direction, and the oblique sleeve valve pipes extend into a first grouting area 110 located in the underground soil layer of the railway 30, and are used for grouting into the first grouting area 110 to improve the strength of the soil layer below the railway 30. The second grouting assembly 200 includes a support pipe 210 and a pipe sleeve valve pipe 220. The support pipe 210 is arranged in the underground soil layer of the railway 30 along a first direction. A plurality of pipe sleeve valve pipes 220 are arranged on the side wall of the support pipe 210. The plurality of pipe sleeve valve pipes 220 are arranged around the support pipe 210 to form a second grouting area 230 to improve the soil layer strength around the support pipe 210. The first direction intersects with the extension direction of the railway 30.

[0045] The monitoring device 310 is arranged on one side of the railway 30 along the first direction, and a plurality of monitoring devices 310 are spaced apart along the extension direction of the railway 30 so as to be able to perform real-time and comprehensive monitoring of the railway 30. In this way, the construction risk of the tunnel 20 crossing the railway 30 can be reduced and the construction safety can be improved.

[0046] The grouting system 10 for underpass railway of the present application forms the first grouting area 110 and the second grouting area 230 respectively through the first grouting assembly 100 and the second grouting assembly 200, and provides double protection for the railway 30. The railway 30 is monitored in real time through multiple monitoring instruments 310, and the grouting system can be adjusted accordingly according to the monitoring, thereby improving the controllability of the safety of the railway 30. That is, the present application can improve the strength of the existing operating railway 30, reduce the adverse effects of the construction process on the foundation of the existing operating railway 30, and improve the safety of subway construction.

[0047] In some embodiments, see Figure 1 , combined with reference Figure 2 As shown, Figure 2 for Figure 1The side cross-sectional view of the grouting system 10 for passing under the railway in the illustrated embodiment. The dimension L of the first grouting area 110 along the first direction satisfies: 52.9m≤L≤74.9m. In some embodiments, the first grouting area 110 may extend 3m beyond the outside of the railway 30 along the first direction. The dimension W of the first grouting area 110 along the extension direction of the railway 30 satisfies: 46.7m≤W≤70.5m. In this way, the first grouting area 110 has a wider extension range, can provide stable support for the railway 30, and reduce the adverse effects of the subway tunnel 20 passing under the railway 30 on the railway 30. The dimension H of the first grouting area 110 along the second direction is 30.92m, wherein the first direction, the second direction and the extension direction of the railway 30 intersect each other. It can be understood that the dimension H of the first grouting area 110 along the second direction is the dimension of the first grouting area 110 penetrating into the land below the railway 30, or the height of the first grouting area 110. The first grouting area 110 is 3 m away from the support pipe 210 along the second direction. Thus, the support pipe 210 is located within the first grouting area 110 , and the first grouting area 110 can provide reinforcement support for the support pipe 210 .

[0048] In some embodiments, the support pipe 210 is 26.52 meters deep underground, that is, the top of the support pipe 210 is 26.52 meters from the ground. The support pipe 210 is a tubular structure with a diameter of 6.4 meters, and the tubular structure extends along the first direction. In this way, the bottom of the first grouting area 110 is 35.92 meters deep underground, that is, the bottom of the first grouting area 110 is 35.92 meters from the ground. Correspondingly, the top of the first grouting area 110 is 5 meters from the ground. The present application uses the first grouting area 110 set up as above to grout the lower layer of the railway 30, and can also grout the surrounding side of the support pipe 210 supporting the tunnel 20.

[0049] In some embodiments, the second grouting area 230 is outside the support pipe 210 and within 3 m from the outer wall of the support pipe 210. That is, the second grouting area 230 is an annular columnar structure, which is arranged outside the support pipe 210 to provide stable and uniform reinforcement for the support pipe 210.

[0050] It can be understood that the second grouting area 230 at least partially overlaps with the first grouting area 110, so that the strength of the surrounding side of the supporting pipe 210 can be further strengthened through the second grouting area 230. The two reinforcement measures of the first grouting area 110 and the second grouting area 230 greatly improve the reinforcement strength of the soil layer around the supporting pipe 210. Grouting through the pipe sleeve valve pipe 220 can play a role in reinforcing the entire grouting area, reducing the risk of uneven settlement of the railway 30 during the shield crossing the railway 30.

[0051] In some embodiments, continue to refer to Figure 2As shown, along the first direction and the direction from the middle of the railway 30 towards the edge, all the inclined sleeve valve pipes form a plurality of inclined sleeve valve pipe groups 120 arranged in sequence. Setting a plurality of inclined sleeve valve pipe groups 120 can improve the grouting speed of the first grouting area 110, facilitate uniform grouting of the first grouting area 110, and is conducive to improving the strength of the first grouting area 110. And in some embodiments, the sleeve valve pipes on both sides of the railway 30 along the first direction are symmetrically arranged. In this way, the uniform distribution of the sleeve valve pipes in the first grouting area 110 can be further improved, and thus it is conducive to improving the strength of the first grouting area 110.

[0052] Each sleeve valve pipe group includes a plurality of first inclined sleeve valve pipes 121 and a plurality of second inclined sleeve valve pipes 122. The plurality of first inclined sleeve valve pipes 121 and the plurality of second inclined sleeve valve pipes 122 are alternately arranged along the extension direction of the railway 30. The included angle N1 between the extension direction of the first inclined sleeve valve pipe 121 and the ground where the railway 30 is located satisfies: 15° ≤ N1 ≤ 45°, and the included angle N2 between the extension direction of the second inclined sleeve valve pipe 122 and the ground where the railway 30 is located satisfies: 50° ≤ N2 ≤ 80°. The above distribution design of the sleeve valve pipes in the present application is conducive to the uniform and staggered arrangement of the sleeve valve pipes in the first grouting area 110, conducive to having staggered sleeve valve pipes everywhere in the first grouting area 110, and conducive to improving the grouting uniformity and grouting strength of the first grouting area 110.

[0053] In some embodiments, as Figure 2 shown, along the first direction, the plurality of first inclined sleeve valve pipes 121 of the plurality of inclined sleeve valve pipe groups 120 are evenly spaced from each other, and along the first direction, the plurality of second inclined sleeve valve pipes 122 of the plurality of inclined sleeve valve pipe groups 120 are evenly spaced from each other. In this way, it is beneficial to uniformly inject the slurry into the first grouting area 110, and thus it is conducive to improving the reinforcement strength of the first grouting area 110.

[0054] In some embodiments, as Figure 1 and 2 shown, along the first direction and the direction from the middle of the railway 30 towards the edge, seven inclined sleeve valve pipe groups 120 can be sequentially arranged. The seven inclined sleeve valve pipe groups 120 include those sequentially arranged along the first direction and the direction from the middle of the railway 30 towards the edge as Figure 2The first oblique sleeve valve tube 121a, the first oblique sleeve valve tube 121b, the first oblique sleeve valve tube 121c, the first oblique sleeve valve tube 121d, the first oblique sleeve valve tube 121e, the first oblique sleeve valve tube 121f and the first oblique sleeve valve tube 121g shown in the figure. The angle N1 between the first oblique sleeve valve tube 121a, the first oblique sleeve valve tube 121b, the first oblique sleeve valve tube 121c, the first oblique sleeve valve tube 121d, the first oblique sleeve valve tube 121e, the first oblique sleeve valve tube 121f and the first oblique sleeve valve tube 121g and the ground all satisfies: 15°≤N1≤45°, and they are all evenly spaced along the first direction.

[0055] Meanwhile, the seven oblique sleeve valve tube groups 120 include a second oblique sleeve valve tube 122a, a second oblique sleeve valve tube 122b, a second oblique sleeve valve tube 122c, a second oblique sleeve valve tube 122d, a second oblique sleeve valve tube 122e, a second oblique sleeve valve tube 122f and a second oblique sleeve valve tube 122g (not shown) which are sequentially arranged along the first direction and from the middle of the railway 30 to the edge. The angles N2 between the second oblique sleeve valve tube 122a, the second oblique sleeve valve tube 122b, the second oblique sleeve valve tube 122c, the second oblique sleeve valve tube 122d, the second oblique sleeve valve tube 122e, the second oblique sleeve valve tube 122f and the second oblique sleeve valve tube 122g (not shown) and the ground all satisfy: 50°≤N2≤80°, and are evenly spaced along the first direction.

[0056] And if Figure 2 As shown in , the unnecessary first oblique sleeve valve tube 121 or the second oblique sleeve valve tube 122 can be adjusted and removed according to actual needs to adapt to different working conditions, such as Figure 2 The embodiment does not have the second oblique sleeve valve tube 122g (not shown) of the oblique sleeve valve tube group 120 at the edge, and will not be described in detail here.

[0057] In some embodiments, the grouting system 10 for underpass of railway in the present application further includes a shield machine, which includes the above-mentioned support pipe 210 and a shield system. It can be understood that the shield system excavates to form a tunnel 20, or in other words, the shield system is used to drill a receiving channel for the support pipe 210 to pass through along a first direction. The support pipe 210 acts as a shield to provide temporary support for the excavated tunnel 20 section that has not been lined, withstand the pressure of the surrounding soil layer, and block groundwater when necessary.

[0058] In some embodiments, Figure 3 As shown, Figure 3It is a side cross-sectional view of the second grouting assembly 200 in one embodiment of the present application. The supporting pipe 210 includes a plurality of segment ring groups 211 connected in sequence along a first direction, each segment ring group 211 includes a plurality of mounting blocks, and the plurality of mounting blocks are connected end to end in sequence around an axis parallel to the first direction to form the segment ring group 211. In the direction of the circumference along the center of the segment ring group 211, each mounting block is provided with at least one through hole, and the through hole is configured to be used for hoisting the mounting block, so as to facilitate the assembly of the segment ring group 211. The through hole can also be used for the pipe sleeve valve tube 220 to pass through. A segment ring group 211 is formed by assembling multiple mounting blocks, and a support pipe 210 is formed by connecting multiple segment ring groups 211 in sequence along a first direction. It can be understood that the support pipe 210 is used to support the tunnel 20 and is hollow. A plurality of through holes are provided on the side wall of the support pipe 210, so that the corresponding pipe sleeve valve tube 220 can pass through the through holes, and then a second grouting area 230 can be formed around the support pipe 210, thereby improving the reinforcement strength around the support pipe 210.

[0059] In some embodiments, the through holes on the mounting block are evenly spaced apart from each other, so that grouting around the support pipe 210 can be evenly performed, thereby further improving the reinforcement strength around the support pipe 210 .

[0060] In some embodiments, continue to refer to Figure 3 As shown, the multiple installation blocks include three standard blocks 212, two connecting blocks 213 and a capping block 214 connected end to end in sequence around an axis parallel to the first direction, and along the center of the segment ring group 211 pointing to the circumference, the standard block 212 is provided with three through holes, the connecting block 213 is provided with three through holes, and the capping block 214 is provided with one through hole. The three through holes on the standard block 212 are evenly spaced and arranged, and the three through holes on the connecting block 213 are also evenly spaced and arranged, and the multiple through holes of the segment ring group 211 are evenly spaced and arranged, so that the grouting in the second grouting area 230 is uniform, which is conducive to improving the reinforcement strength around the supporting pipe 210.

[0061] In some embodiments, see Figure 4 As shown, Figure 4 The distribution diagram of the monitoring instrument 310 in one embodiment of the present application. The grouting system 10 for underpass railway of the present application also includes a monitoring component 300, which includes a plurality of monitoring instruments 310, a column monitor 320 and a water level monitor. The monitoring component 300 is used to monitor the railway 30 in real time, which is beneficial to improve the construction safety and reduce the construction risk.

[0062] In some embodiments, the monitor 310 is used to monitor information such as the settlement of the ballast track structure of the railway 30, the settlement of the subgrade, the uplift of the subgrade, the horizontal displacement of the ballast track structure, and the track geometry state parameters. Among them, the track geometry state parameters include parameters such as the gauge, level, alignment, track direction, and cross-level of the railway 30 track.

[0063] In some embodiments, referring to Figure 4 As shown, the spacing X between two adjacent monitors 310 satisfies: 10m ≤ X ≤ 15m. That is, a plurality of monitors 310 are arranged on one side of the track, and along the extension direction of the track, the plurality of monitors 310 are arranged at intervals, so as to be able to monitor the track parameters at intervals, thereby improving the safety of the track during the construction stage.

[0064] In some embodiments, as Figure 4 As shown, the plurality of monitors 310 include a plurality of first monitors 311 and a plurality of second monitors 312. The plurality of first monitors 311 are arranged at intervals along the extension direction of the railway 30, and the spacing X1 between two adjacent first monitors 311 is 10m. The plurality of second monitors 312 are respectively arranged on both sides of the plurality of first monitors 311 along the extension direction of the railway 30, and the spacing X1 between two adjacent second monitors 312 is 15m. It can be understood that it can be set at a position relatively close to the excavation tunnel 20 on the railway 30 track. For example, the first monitor 311 with a spacing of 10m is set at the track monitoring section, and the second monitor 312 with a spacing of 15m is set at a position relatively far from the excavation tunnel 20. In this way, the spacing of the monitor 310 can be reasonably adjusted to monitor the railway 30 track in a timely manner, and the monitor 310 can be saved and the cost can be saved.

[0065] In some embodiments, 8 first monitors 311 can be set, and 6 second monitors 312 with a spacing X2 of 15m from each other are set. The 8 first monitors 311 are spaced X1 of 10m from each other. The 6 second monitors 312 are distributed on both sides of the 8 first monitors 311 along the extension direction of the railway 30, that is, 3 of them are arranged on one side of the 8 first monitors 311 along the extension direction of the railway 30, and the other 3 are arranged on the other side of the 8 first monitors 311 along the extension direction of the railway 30. In this way, the monitors 310 are evenly arranged on one side of the railway 30 to improve the monitoring effect on the railway 30.

[0066] In some embodiments, as Figure 2 and Figure 4As shown, the grouting system 10 under the railway further includes a column monitor 320 and a water level monitor. The column monitor 320 is arranged on the catenary column 330 around the railway 30 to monitor the settlement, displacement and inclination degree of the catenary column 330. The water level monitor is arranged in the underground soil layer on the periphery of the railway 30, that is, the water level monitor is arranged underground around the railway 30 and can penetrate into the slightly weathered rock surface 0.5 m underground for monitoring the underground water level.

[0067] The construction process of using the grouting system 10 under the railway of the present application to cross the existing operating railway 30 to form the subway tunnel 20 is as follows:

[0068] S1. Before grouting and strengthening the first grouting area 110 with the first grouting assembly 100, arrange the monitoring assembly 300 to complete the corresponding arrangement of multiple monitors 310, the column monitor 320 and the water level monitor.

[0069] S2. When the subway tunnel 20 crosses under the railway 30 in the first direction, use the first grouting assembly 100 to obliquely grout and strengthen the first grouting area 110 under the railway 30, and start to use the monitoring assembly 300 to monitor the railway 30 before grouting and strengthening. Among them, the grouting construction of the first grouting area 110 can be carried out in two phases. For example, if inclined sleeve valve pipe groups 120 need to be set on both sides of the railway 30 along the first direction, in one phase of the two phases, the inclined sleeve valve pipe group 120 on one side of the railway 30 along the first direction can be set first and grouted, and in the other phase of the two phases, the inclined sleeve valve pipe group 120 on the other side of the railway 30 along the first direction can be set and grouted to form the entire first grouting area 110.

[0070] S3. Carry out shield construction to cross under the railway 30 to form the tunnel 20, set the support pipe fitting 210 to penetrate through the tunnel 20 to support the soil layer, set the pipe fitting sleeve valve pipe 220 on the through hole of the support pipe fitting 210, and grout into the second grouting area 230 through the pipe fitting sleeve valve pipe 220. It can be understood that at least part of the second grouting area 230 coincides with the first grouting area 110. In this way, grouting through the pipe fitting sleeve valve pipe 220 can play a role in reinforcing and strengthening the entire grouting area, reducing the risk of uneven settlement of the railway 30 during the shield crossing the railway 30 and improving the construction safety.

[0071] The support pipe fitting 210 of the present application can be prepared in advance, or can also be formed by modifying the existing support pipe fitting 210 before construction. A corresponding through hole is arranged on the existing support pipe fitting 210, and a suitable pipe fitting sleeve valve pipe 220 is prepared. In this way, the cost can be saved and the existing support pipe fitting 210 can be reasonably utilized.

[0072] When shield construction is carried out to pass under the railway 30 to form a tunnel 20, the monitoring component 300 is used to monitor and feedback the shield construction excavation parameters and data in real time, and the pipe sleeve valve pipe 220 is used for grouting according to the monitoring conditions during the shield construction excavation process to further strengthen the reinforcement strength of the second grouting area 230, and the construction is fed back in real time according to the monitoring conditions, and emergency measures are prepared.

[0073] The grouting system 10 for underpass of the railway of the present application forms a first grouting area 110 and a second grouting area 230 respectively through a first grouting assembly 100 and a second grouting assembly 200, performs double reinforcement protection on the railway 30, and monitors the railway 30 in real time through a plurality of monitors 310, thereby improving the controllability of the safety of the railway 30. That is, the present application can improve the strength of the existing operating railway 30, reduce the adverse effects of the construction process on the foundation of the existing operating railway 30, reduce the construction risk of the shield tunnel crossing the railway 30, and improve the safety of subway construction.

[0074] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A grouting system for passing under a railway, characterized in that, The grouting system for underpass railway comprises: A first grouting assembly includes a plurality of oblique sleeve valve pipes, the plurality of oblique sleeve valve pipes are distributed on opposite sides of the railway along a first direction, and the oblique sleeve valve pipes extend into a first grouting area located in an underground soil layer of the railway to inject grout into the first grouting area; A second grouting assembly includes a supporting pipe and a pipe sleeve valve pipe, wherein the supporting pipe is inserted into the underground soil layer of the railway along the first direction, a plurality of the pipe sleeve valve pipes are arranged on the side wall of the supporting pipe, and the plurality of the pipe sleeve valve pipes are arranged around the supporting pipe to form a second grouting area; and A plurality of monitoring devices, wherein the monitoring devices are arranged on one side of the railway along the first direction, and the plurality of monitoring devices are distributed at intervals along the extension direction of the railway; Wherein, the first direction intersects with the extension direction of the railway.

2. The grouting system for crossing under a railway according to claim 1, characterized in that, The dimension L of the first grouting area along the first direction satisfies: 52.9m≤L≤74.9m; the dimension W along the extension direction of the railway satisfies: 46.7m≤W≤70.5m, the dimension H along the second direction is 30.92m, and the first grouting area is 3m away from the support pipe at one side of the second direction away from the railway; The first direction, the second direction and the extension direction of the railway intersect each other.

3. The grouting system for underpass railway according to claim 1, characterized in that: The second grouting area is outside the supporting pipe and within a range of 3 m from the outer side wall of the supporting pipe.

4. The grouting system for crossing under a railway according to claim 1, characterized in that, Along the first direction and from the middle of the railway to the edge, all the oblique sleeve valve pipes form a plurality of oblique sleeve valve pipe groups arranged in sequence; Each of the sleeve valve tube groups comprises a plurality of first oblique sleeve valve tubes and a plurality of second oblique sleeve valve tubes, and the plurality of first oblique sleeve valve tubes and the plurality of second oblique sleeve valve tubes are alternately arranged along the extension direction of the railway; The angle N1 between the extension direction of the first oblique sleeve valve tube and the ground where the railway is located satisfies: 15°≤N1≤45°, and the angle N2 between the extension direction of the second oblique sleeve valve tube and the ground where the railway is located satisfies: 50°≤N2≤80°.

5. The grouting system for underpass railway according to claim 4, characterized in that: Along the first direction, the first oblique sleeve valve tubes of the plurality of oblique sleeve valve tube groups are evenly spaced apart from each other, and along the first direction, the second oblique sleeve valve tubes of the plurality of oblique sleeve valve tube groups are evenly spaced apart from each other.

6. The grouting system for crossing under a railway according to claim 1, characterized in that, The supporting pipe fitting includes a plurality of segment ring groups connected in sequence along a first direction, each of the segment ring groups includes a plurality of mounting blocks, and the plurality of mounting blocks are connected end to end in sequence around an axis parallel to the first direction to form the segment ring group. In the direction pointing to the circumference from the center of the segment ring group, each of the mounting blocks is provided with at least one through hole, and the through hole is configured to be able to be used for hoisting the mounting block and to allow the sleeve valve tube of the pipe fitting to pass through.

7. The grouting system for crossing under a railway according to claim 6, characterized in that, The plurality of mounting blocks include three standard blocks, two connecting blocks and a capping block which are sequentially connected end to end around an axis parallel to the first direction; Along the direction pointing from the center of the segment ring group to the circumference, the standard block is provided with three through holes, the connecting block is provided with three through holes, and the capping block is provided with one through hole.

8. The grouting system for crossing under a railway according to claim 1, characterized in that, The distance X between two adjacent ones of the monitors satisfies: 10m ≤ X ≤ 15m.

9. The grouting system for underpass railway according to claim 8, characterized in that: The multiple monitors include multiple first monitors and multiple second monitors. The multiple first monitors are arranged at intervals along the extension direction of the railway, and the distance X1 between two adjacent first monitors is 10m. The multiple second monitors are respectively arranged on both sides of the multiple first monitors along the extension direction of the railway, and the distance X1 between two adjacent second monitors is 15m.

10. The grouting system for crossing under a railway according to claim 1, characterized in that, The grouting system for the railway underpass also includes a column monitor and a water level monitor. The column monitor is arranged on the catenary column around the railway to monitor the settlement, displacement and inclination degree of the catenary column. The water level monitor is arranged in the underground soil layer on the periphery of the railway for monitoring the underground water level.

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