Freezing method contact channel thaw collapse grouting construction method

Abstract

The invention discloses a thaw collapse grouting construction method for a connection channel through a freezing method. The method comprises the following steps that S1, freezing reinforcement is conducted, specifically, freezing reinforcement is conducted within the set range of the peripheral side of the connection channel to be excavated between two tunnels, and a frozen soil body is formed; s2, a connecting channel is excavated, specifically, the connecting channel is excavated to communicate the two tunnels, and a supporting and reinforcing device is constructed on the inner side of the connecting channel; s3, thaw collapse grouting is conducted, specifically, grouting is conducted in sequence from inside to outside in the frozen soil body to form multiple circles of grouting soil bodies connected in sequence, and after the inner circle of grouting soil body is solidified, grouting is conducted on the outer circle of grouting soil body; and each circle of grouting soil body is formed by synchronously and symmetrically grouting two sides from bottom to top in a segmented manner, and the upper section is grouted after the lower section is solidified. According to the freezing method connection channel thaw collapse grouting construction method, the grouting range is convenient to control, grouting material waste is not prone to being caused, stress is balanced, structural deformation is avoided, and grout diffusion uniformity and structural durability are improved.

Description

Technical Field

[0001] The invention relates to the technical field of underground engineering, and in particular to a freezing method for melting and sinking grouting construction of a connecting channel. Background Art

[0002] With the increasing number of underground tunnel projects being constructed in soft soil areas, the freezing method of excavation and construction is becoming increasingly common to minimize construction risks. While this method effectively addresses the issue of controlling surrounding rock deformation during underground tunnel excavation, its drawbacks are also becoming increasingly apparent. After the freezing method is completed, the frozen soil will thaw and settle, which can easily cause soil flow and settlement, leading to ground subsidence and pipeline damage, compromising the safety of surface structures. The traditional melting and sinking grouting reinforcement process generally forms a circle of grouting soil by melting and sinking grouting into the frozen soil at one time, and the grouting position is set arbitrarily, which has the following disadvantages: first, the grouting range cannot be controlled, which easily leads to waste of grouting materials, and excessive grouting can easily cause damage to surrounding underground structures; second, the grouting force is unbalanced, and tunnel structures such as connecting passages are prone to structural deformation due to one-side bias of grouting; third, the grouting slurry spreads unevenly, and the thawed soil cannot form a uniformly solidified surrounding rock system, thereby affecting the durability of tunnel structures such as connecting passages; fourth, during the melting and sinking grouting operation, grouting pipe holes are prone to gushing, causing underground soil loss; fifth, after the melting and sinking grouting is completed, the grouting pipe is exposed on the surface of the structure, affecting the durability and appearance of the structure. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a freezing method for connecting channel melting grouting construction that is easy to control the grouting range, is not prone to waste of grouting materials, has balanced forces, avoids structural deformation, and improves slurry diffusion uniformity and structural durability.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: A freezing method for connecting channel melting grouting construction includes the following steps: S1. Freezing and reinforcement: Freezing and reinforcement are performed within a set range around the connecting passage to be excavated between the two tunnels to form frozen soil. S2. Excavation of a connecting passage: Excavate a connecting passage to connect the two tunnels, and construct support and reinforcement devices on the inner side of the connecting passage; S3. Thaw-settlement grouting: Grouting is performed from the inside to the outside of the frozen soil to form multiple circles of grouting soil connected in sequence. After the inner circle of grouting soil solidifies, the outer circle of grouting soil is grouted. Each circle of grouting soil is formed by synchronous grouting from bottom to top on both sides, and after the lower section solidifies, the upper section is grouted.

[0005] As a further improvement of the above technical solution: In S3, each circle of the grouting soil includes a bottom layer segment, a lower left segment, a left middle segment, an upper left segment, a top layer segment, an upper right segment, a right middle segment and a lower right segment connected in sequence at the first layer. The lower left segment and the lower right segment are symmetrically arranged, the left middle segment and the right middle segment are symmetrically arranged, and the upper left segment and the upper right segment are symmetrically arranged. The bottom layer segment is formed by synchronous grouting on both sides, the lower left segment and the lower right segment are formed by synchronous grouting, the left middle segment and the right middle segment are formed by synchronous grouting, the upper left segment and the upper right segment are formed by synchronous grouting, and the middle of the top layer segment is formed by grouting.

[0006] The grouting soil body is provided with at least three circles.

[0007] Grouting devices are provided at positions corresponding to the supporting and reinforcing devices and the sections of the grouting soil body. In S3, grouting is performed on each section of the grouting soil body through the corresponding grouting device.

[0008] The grouting device includes a grouting pipe, a water stop ring and a valve. The grouting pipe is buried in the grouting device, and one end of the grouting pipe extends into the frozen soil body corresponding to the innermost circle grouting soil body. The valve is connected to the other end of the grouting pipe and is located in the communication channel. The water stop ring is arranged on the outer periphery of the grouting pipe and buried in the supporting reinforcement device.

[0009] In S3, each section of each circle of grouting soil is grouting through a grouting channel passing through a grouting pipe.

[0010] The grouting channel is formed by drilling with a drilling rig.

[0011] In S3, the grouting pipes corresponding to both sides of the bottom section are symmetrically arranged and connected through the first slurry supply pipeline, the grouting pipes corresponding to the lower left section and the lower right section are symmetrically arranged and connected through the second slurry supply pipeline, the grouting pipes corresponding to the left middle section and the right middle section are symmetrically arranged and connected through the third slurry supply pipeline, and the grouting pipes corresponding to the upper left section and the upper right section are symmetrically arranged and connected through the fourth slurry supply pipeline.

[0012] The other end of the grouting pipe is located in the support and reinforcement device. The freezing method connecting channel melting and grouting construction method also includes step S4, plugging: removing the valve, adding a plugging cap to the other end of the grouting pipe, and using sealing material to cover the external space of the plugging cap so that the sealing material is flush with the inner surface of the support and reinforcement device.

[0013] In S2, the support and reinforcement device includes an initial support and a secondary lining, and the secondary lining is supported on the inner side of the initial support.

[0014] Compared with the prior art, the advantages of the present invention are: The freezing method communication channel melting grouting construction method of the present invention adopts the method of "grouting into the frozen soil from the inside to the outside in sequence to form multiple circles of grouting soil bodies connected in sequence, and grouting the outer circle of grouting soil body after the inner circle of grouting soil body solidifies; each circle of grouting soil body is formed by synchronous grouting from bottom to top in a segmented and symmetrical manner on both sides, and grouting the upper section is performed after the lower section solidifies." In the first aspect, each circle of grouting soil body is formed by synchronous grouting from bottom to top in a segmented and symmetrical manner on both sides, that is, the lower section is grouted first, and the upper section is grouted after solidification. The lower section structure provides support and limitation for the upper section structure, and grouting is performed circle by circle from the inside to the outside, which is convenient for Controlling the grouting range will prevent waste of grouting materials and damage to surrounding underground structures due to excessive grouting. Second, each circle of grouting soil is formed by synchronous symmetrical grouting from bottom to top on both sides. That is, each circle of grouting soil is formed by synchronous grouting from bottom to top on both sides, so that the forces on both sides of the connecting channel are balanced, which is beneficial to avoid structural deformation due to biased pressure on one side of the grouting. Third, the combination of segmented symmetrical grouting and circle-by-circle grouting improves the uniformity of slurry diffusion, so that the frozen soil after thawing forms a uniformly solidified surrounding rock system, thereby improving the durability of the peripheral structure of the connecting channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the longitudinal structure of the construction support reinforcement device of the freezing method communication channel melting sinking grouting construction method of the present invention.

[0016] Figure 2 It is a schematic cross-sectional structure diagram of the construction support and reinforcement device of the freezing method communication channel melting and grouting construction method of the present invention.

[0017] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0018] Figure 4 It is a structural schematic diagram of the present invention's freezing method communication channel melting grouting construction method when drilling the grouting channel.

[0019] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure at point B in the middle.

[0020] Figure 6 This is a schematic diagram of the cross-sectional structure of the first circle of grouting soil after the freezing method communication channel melting grouting construction method of the present invention is completed.

[0021] Figure 7 It is a schematic cross-sectional structural diagram of the second circle of grouting soil construction in the freezing method connecting channel melting grouting construction method of the present invention.

[0022] Figure 8It is a schematic cross-sectional structure diagram of the second circle of grouting soil after the freezing method communication channel melting grouting construction method of the present invention is completed.

[0023] Figure 9 It is a schematic cross-sectional structure diagram of the third circle of grouting soil after completion of the freezing method communication channel melting and grouting construction method of the present invention.

[0024] Figure 10 It is a schematic diagram of the longitudinal structure after the third circle of grouting soil is completed in the freezing method communication channel melting and sinking grouting construction method of the present invention.

[0025] Figure 11 It is a schematic cross-sectional structure diagram of the freezing method communication channel melt-sinking grouting construction method after plugging.

[0026] Figure 12 yes Figure 11 Schematic diagram of the enlarged structure at point C in the middle.

[0027] The numbers in the figure represent: 1. Tunnel; 2. Connecting passage; 3. Support and reinforcement device; 31. Primary support; 32. Secondary lining; 4. Frozen soil; 5. Grouting soil; 51. Bottom section; 52. Lower left section; 53. Left middle section; 54. Upper left section; 55. Top section; 56. Upper right section; 57. Right middle section; 58. Lower right section; 6. Grouting device; 61. Grouting pipe; 611. Plug cap; 612. Sealing material; 62. Water stop ring; 63. Valve; 7. Grouting channel; 8. Drilling rig; 9. First slurry supply pipeline; 91. Second slurry supply pipeline; 92. Third slurry supply pipeline; 93. Fourth slurry supply pipeline. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as limiting the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0031] In the present invention, unless otherwise expressly specified or limited, terms such as "assemble," "connect," "connect," and "fix" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] Figures 1 to 12 An embodiment of the present invention's method for constructing a connecting channel by melting and grouting using a freezing method is shown. The method comprises the following steps: S1, Freeze reinforcement: Freeze and reinforce the surrounding area of the connecting passage 2 to be excavated between the two tunnels 1 to form a frozen soil body 4, such as Figure 1 and Figure 2 As shown; S2, excavation of connecting channel 2: excavation of connecting channel 2 to connect the two tunnels 1, and construction of support reinforcement device 3 inside the connecting channel 2, such as Figures 1 to 3 As shown; S3, thawing grouting: Grouting is sequentially injected into the frozen soil 4 from the inside to the outside to form multiple circles of grouting soil 5 connected in sequence, and after the inner circle of grouting soil 5 solidifies, the outer circle of grouting soil 5 is injected; each circle of grouting soil 5 is formed by synchronous grouting from bottom to top in sections, and after the lower section solidifies, the upper section is injected. Figures 4 to 10 shown.

[0033] The present freezing method communication channel melting grouting construction method adopts the method of "grouting into the frozen soil 4 from the inside to the outside in sequence to form multiple circles of grouting soil 5 connected in sequence, and grouting the outer circle of grouting soil 5 after the inner circle of grouting soil 5 solidifies; each circle of grouting soil 5 is formed by synchronous grouting from bottom to top on both sides, and grouting the upper section after the lower section solidifies." On the one hand, each circle of grouting soil 5 is formed by synchronous grouting from bottom to top on both sides, that is, the lower section is grouted first, and the upper section is grouted after solidification. The lower section structure provides support and limitation for the upper section structure, and grouting is done circle by circle from the inside to the outside, which is convenient for control The grouting range is controlled, which is not easy to cause waste of grouting materials and damage to surrounding underground structures due to excessive grouting; secondly, each circle of grouting soil 5 is formed by synchronous segmented symmetrical grouting from bottom to top on both sides, that is, each circle of grouting soil 5 is formed by synchronous segmented grouting from bottom to top on both sides, so that the forces on both sides of the connecting channel 2 are balanced, which is conducive to avoiding structural deformation due to biased pressure on one side of the grouting; thirdly, the combination of segmented symmetrical grouting and circle-by-circle grouting improves the uniformity of slurry diffusion, so that the frozen soil 4 after thawing forms a uniformly solidified surrounding rock system, thereby improving the durability of the peripheral structure of the connecting channel 2.

[0034] Furthermore, in this embodiment, in S3, each circle of grouting soil 5 includes a bottom section 51, a lower left section 52, a left middle section 53, an upper left section 54, a top section 55, an upper right section 56, a right middle section 57 and a lower right section 58 connected in sequence on the first layer. The lower left section 52 and the lower right section 58 are symmetrically arranged, the left middle section 53 and the right middle section 57 are symmetrically arranged, and the upper left section 54 and the upper right section 56 are symmetrically arranged. The bottom section 51 is formed by synchronous grouting on both sides, the lower left section 52 and the lower right section 58 are formed by synchronous grouting, the left middle section 53 and the right middle section 57 are formed by synchronous grouting, the upper left section 54 and the upper right section 56 are formed by synchronous grouting, and the middle of the top section 55 is formed by grouting. Specifically, the bottom section 51 is located on the lower side of the communication channel 2, the lower left section 52, the left middle section 53 and the upper left section 54 are located on the left side of the communication channel 2, the upper right section 56, the right middle section 57 and the lower right section 58 are located on the right side of the communication channel 2, and the top section 55 is located on the top side of the communication channel 2. After the bottom section 51 is formed by synchronous grouting on both sides (synchronous grouting on both sides or both ends of the bottom section 51), synchronous grouting is then performed to form the lower left section 52 and the lower right section 58. After the lower left section 52 and the lower right section 58 are formed by synchronous grouting (synchronous grouting into the lower left section 52 and the lower right section 58), synchronous grouting is performed to form the left middle section 53 and the right middle section 57. After the left middle section 53 and the right middle section 57 are formed by synchronous grouting (synchronous grouting into the left middle section 53 and the right middle section 57), synchronous grouting is performed to form the upper left section 54 and the upper right section 56. After the upper left section 54 and the upper right section 56 are formed by synchronous grouting (synchronous grouting into the upper left section 54 and the upper right section 56), grouting is performed in the middle (grouting from the middle of the top section 55 to the top section 55) to form the top section 55. The use of a method of simultaneous grouting on both sides of the bottom, simultaneous symmetrical grouting on both sides, and grouting in the middle of the top is, on the one hand, more conducive to controlling the grouting range, on the other hand, conducive to ensuring the force balance on both sides of the connecting channel 2 and avoiding structural deformation due to bias on one side of the grouting. Thirdly, it is conducive to improving the uniformity of slurry diffusion.

[0035] Preferably, each bottom section 51 overlaps up and down, each lower left section 52 overlaps from the inside to the outside, and the top surfaces are flush, each left middle section 53 overlaps from the inside to the outside, and the bottom surfaces are flush, and the top surfaces are coplanar, each upper left section 54 overlaps from the inside to the outside, and the bottom and top surfaces are coplanar, each top section 55 overlaps up and down, each upper right section 56 overlaps from the inside to the outside, and the bottom and top surfaces are coplanar, each right middle section 57 overlaps from the inside to the outside, and the bottom surfaces are flush, and the top surfaces are coplanar, and each lower right section 58 overlaps from the inside to the outside, and the top surfaces are flush.

[0036] Furthermore, in this embodiment, the grouting soil body 5 is provided with at least three circles. Taking three circles as an example, from the inside to the outside, they are sequentially designated as the first circle of grouting soil body 5, the second circle of grouting soil body 5, and the third circle of grouting soil body 5. After the first circle of grouting soil body 5 is fully grouted, the second circle of grouting soil body 5 is then grouted. After the second circle of grouting soil body 5 is fully grouted, the third circle of grouting soil body 5 is then grouted.

[0037] Furthermore, in this embodiment, if Figures 4 to 10 As shown, the support and reinforcement device 3 is provided with a grouting device 6 at a position corresponding to each section of the grouting soil body 5. In S3, each section of the grouting soil body 5 is grouted by the corresponding grouting device 6. That is, the support and reinforcement device 3 is provided with a grouting device 6 at a position corresponding to the bottom section 51, the lower left section 52, the left middle section 53, the upper left section 54, the top section 55, the upper right section 56, the right middle section 57, and the lower right section 58. The bottom section 51, the lower left section 52, the left middle section 53, the upper left section 54, the top section 55, the upper right section 56, the right middle section 57, and the lower right section 58 are all formed by grouting the corresponding grouting device 6.

[0038] Furthermore, in this embodiment, if Figure 3 As shown, the grouting device 6 includes a grouting pipe 61, a water stop ring 62 and a valve 63. The grouting pipe 61 is buried in the grouting device 6, and one end of the grouting pipe 61 extends to the frozen soil 4 corresponding to the innermost circle grouting soil 5. The valve 63 is connected to the other end of the grouting pipe 61 and is located in the connecting channel 2. The water stop ring 62 is provided on the outer periphery of the grouting pipe 61 and is buried in the supporting reinforcement device 3. Preferably, the valve 63 is threadedly connected to the grouting pipe 61 for easy removal. More preferably, each section of the grouting soil 5 corresponds to a plurality of grouting devices 6, and the grouting devices 6 can be arranged in multiple rows along the axial direction of the connecting channel 2. The interval between adjacent grouting devices 6 is set according to actual needs, generally not exceeding three meters.

[0039] Furthermore, in this embodiment, in S3 , each section of each circle of grouting soil 5 is grouting using the grouting channel 7 passing through the grouting pipe 61 .

[0040] Furthermore, in this embodiment, if Figure 5 As shown, the grouting channel 7 is formed by drilling a hole through a drilling rig 8. During drilling, the drill rod of the drilling rig 8 passes through the opened valve 63 and drills inward along the grouting pipe 61 until the depth of the grouting soil 5 corresponding to the circle to be grouted is reached. After the drilling is completed, the drilling rig 8 is pulled out and grouting can be performed through the valve 63 and the grouting pipe 61.

[0041] Furthermore, in this embodiment, if Figure 6As shown in S3, the grouting pipes 61 corresponding to the bottom section 51 are symmetrically arranged and connected through the first grouting pipeline 9. The grouting pipes 61 corresponding to the lower left section 52 and the lower right section 58 are symmetrically arranged and connected through the second grouting pipeline 91. The grouting pipes 61 corresponding to the left middle section 53 and the right middle section 57 are symmetrically arranged and connected through the third grouting pipeline 92. The grouting pipes 61 corresponding to the upper left section 54 and the upper right section 56 are symmetrically arranged and connected through the fourth grouting pipeline 93. The grouting pipes 61 are symmetrically arranged and connected through the corresponding grouting pipelines (specifically, the valves 63 on the grouting pipes 61 are connected through the corresponding grouting pipelines), which facilitates synchronous grouting. During melt-sinking grouting, the anti-gushing valve 63 installed at the outer end of the grouting pipe 61 prevents groundwater and soil loss.

[0042] Furthermore, in this embodiment, the other end of the grouting pipe 61 is located in the support and reinforcement device 3, and the freezing method communication channel melting and sinking grouting construction method further includes step S4, plugging: removing the valve 63, adding a plugging cap 611 to the other end of the grouting pipe 61, and using a sealing material 612 to cover the external space of the plugging cap 611, so that the sealing material 612 is flush with the inner surface of the support and reinforcement device 3, as shown in FIG. Figure 11 and Figure 12 In this way, after the grouting is completed, the outer port of the grouting pipe 61 is strictly sealed and hidden in the supporting and reinforcing device 3, without affecting the durability and aesthetics of the tunnel structure.

[0043] Furthermore, in this embodiment, in S2 , the supporting and reinforcing device 3 includes an initial support 31 and a secondary lining 32 , and the secondary lining 32 is supported on the inner side of the initial support 31 .

[0044] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A freezing method for connecting channel melting grouting construction, characterized in that: The steps include: S1, freezing reinforcement: freezing reinforcement is performed on a set range around the connecting passage (2) to be excavated between the two tunnels (1) to form a frozen soil body (4); S2. Excavating a connecting passage (2): excavating a connecting passage (2) to connect the two tunnels (1), and constructing a supporting reinforcement device (3) on the inner side of the connecting passage (2); S3, thawing grouting: Grouting is sequentially injected into the frozen soil (4) from the inside to the outside to form multiple circles of grouting soil (5) connected in sequence, and after the inner circle of grouting soil (5) solidifies, the outer circle of grouting soil (5) is injected; each circle of grouting soil (5) is formed by synchronous grouting from bottom to top in sections on both sides, and after the lower section solidifies, the upper section is injected.

2. The method for constructing a communication channel by melting and grouting using a freezing method according to claim 1, characterized in that: In said S3, each circle of said grouting soil (5) includes a bottom layer section (51), a lower left section (52), a left middle section (53), an upper left section (54), a top layer section (55), an upper right section (56), a right middle section (57) and a lower right section (58) connected in sequence at the first layer, said lower left section (52) and lower right section (58) are symmetrically arranged, said left middle section (53) and right middle section (57) are symmetrically arranged, said upper left section (54) and upper right section (56) are symmetrically arranged, said bottom layer section (51) is formed by synchronous grouting on both sides, said lower left section (52) and lower right section (58) are formed by synchronous grouting, said left middle section (53) and right middle section (57) are formed by synchronous grouting, said upper left section (54) and upper right section (56) are formed by synchronous grouting, and said top layer section (55) is formed by grouting in the middle.

3. The method for constructing a communication channel by melting and grouting by a freezing method according to claim 1, characterized in that: The grouting soil body (5) is provided with at least three circles.

4. The method for constructing a communication channel by melting and grouting using a freezing method according to claim 2, characterized in that: Grouting devices (6) are provided at positions corresponding to the supporting and reinforcing device (3) and each section of the grouting soil body (5). In S3, each section of the grouting soil body (5) is grouted by the corresponding grouting device (6).

5. The method for constructing a communication channel by melting and grouting using a freezing method according to claim 4, characterized in that: The grouting device (6) comprises a grouting pipe (61), a water stop ring (62) and a valve (63); the grouting pipe (61) is buried in the grouting device (6), and one end of the grouting pipe (61) extends into the frozen soil body (4) corresponding to the innermost circle grouting soil body (5); the valve (63) is connected to the other end of the grouting pipe (61) and is located in the communication channel (2); the water stop ring (62) is provided on the outer periphery of the grouting pipe (61) and is buried in the supporting reinforcement device (3).

6. The method for constructing a communication channel by melting and grouting using a freezing method according to claim 5, characterized in that: In the above-mentioned S3, each section of each circle of grouting soil (5) is grouting using a grouting channel (7) passing through a grouting pipe (61).

7. The method for constructing a communication channel by melting and grouting using a freezing method according to claim 6, characterized in that: The grouting channel (7) is formed by drilling with a drilling machine (8).

8. The method for constructing a communication channel by melting and grouting using a freezing method according to claim 6, characterized in that: In S3, the grouting pipes (61) corresponding to both sides of the bottom section (51) are symmetrically arranged and connected through the first slurry supply pipeline (9); the grouting pipes (61) corresponding to the lower left section (52) and the lower right section (58) are symmetrically arranged and connected through the second slurry supply pipeline (91); the grouting pipes (61) corresponding to the left middle section (53) and the right middle section (57) are symmetrically arranged and connected through the third slurry supply pipeline (92); and the grouting pipes (61) corresponding to the upper left section (54) and the upper right section (56) are symmetrically arranged and connected through the fourth slurry supply pipeline (93).

9. The method for constructing a communication channel by melting and grouting using a freezing method according to claim 6, characterized in that: The other end of the grouting pipe (61) is located in the support and reinforcement device (3). The freezing method communication channel melting and sinking grouting construction method also includes step S4, plugging: removing the valve (63), adding a plugging cap (611) to the other end of the grouting pipe (61), and using a sealing material (612) to cover the external space of the plugging cap (611), so that the sealing material (612) is flush with the inner surface of the support and reinforcement device (3).

10. The freezing method for connecting channel melting and grouting construction according to any one of claims 1 to 9, characterized in that: In S2, the support reinforcement device (3) includes an initial support (31) and a secondary lining (32), and the secondary lining (32) is supported on the inner side of the initial support (31).

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