Tunnel support structure and construction method thereof

Abstract

The application discloses a tunnel supporting structure and a construction method thereof, and solves the problems of complex connection operation and large construction difficulty of a pipe curtain method supporting structure in the prior art. The technical scheme of the application is as follows: the tunnel supporting structure comprises a plurality of foundation pipes and active pipes supported in a stratum; the active pipes are connected with adjacent pipes in a cutting and engaging mode; two adjacent pipes intersect with each other to form a tunnel supporting frame in a embedded and fixed stringing mode; and a filling medium is arranged in the tunnel supporting frame to form the tunnel supporting structure. The tunnel supporting structure is a pipe curtain supporting structure connected in an engaging mode, has various structural forms, and has a clear structural system. The tunnel supporting frame is formed by taking the foundation pipes as base points and by engaging and stringing the active pipes. The tunnel supporting structure is connected quickly, and the filling medium is filled in the tunnel supporting structure to form the supporting structure. The tunnel supporting structure is simple in operation, the engaging connection between the pipes strengthens the connection integrity of the supporting structure, the filling medium strengthens the strength of the supporting structure, and the construction difficulty of the tunnel supporting structure is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel support, in particular to a tunnel support structure and a construction method thereof. BACKGROUND

[0002] To meet the increasing demand for underground space, underground oil storage, underground tunnels, main plant of hydropower stations, large-span caverns, and large-span highway and railway tunnel construction are increasing. When excavating underground space, the construction method of supporting first and then excavating is often used to ensure construction safety. The pipe curtain method is a strong support structure form.

[0003] In the prior art, pipe jacking machines are generally used for construction, and multiple pipes are connected to form a support structure for surrounding rock of a tunnel to ensure construction safety. For example, Chinese Patent No. CN 117823166 A relates to a combined pipe curtain in soft soil layer and a large-span underground space excavation construction method, but the joint in the patent uses a casing pipe to connect each pipe section, which is weak and difficult to install in the stratum. Chinese Patent No. CN 117868842 A discloses a type of pipe curtain structure, but the joint of the pipe curtain structure uses an adjusting mechanism for connection, which is complex and difficult to operate. The above-mentioned existing technology uses a directly formed bite pipe, which is not formed by cutting during construction, and requires multiple pipes to be installed together, which causes large disturbance to the stratum and makes construction difficult. SUMMARY

[0004] In view of the deficiencies in the above background art, the present application provides a tunnel support structure and a construction method thereof, which solves the problems of complex connection operation and high construction difficulty of the pipe curtain method support structure in the prior art.

[0005] The technical solution of the present application is implemented as follows: a plurality of base pipes and active pipes are supported in the stratum, the active pipes are connected to adjacent pipes in a cutting and biting manner, the intersection of adjacent two pipes forms a tunnel support frame in a embedded and fixed stringing form, and a filling medium is arranged in the tunnel support frame to form a tunnel support structure.

[0006] Further preferably, the base pipes are arranged in the stratum along the tunnel axis direction, and adjacent two base pipes are arranged at intervals, with an interval distance less than the diameter of the active pipe. The base pipes are arranged at intervals along the designed support contour line, mainly serving as positioning. The active pipes are arranged along the designed support contour line, cut adjacent pipes along the tunnel axis direction to form a bite connection stringing each pipe to constitute the entire tunnel support frame, and the active pipes are embedded in the opening of adjacent pipes, mainly serving as connection.

[0007] As a preferred mode, the tunneling equipment cuts the base pipes to form a cutting concave channel along the tunnel axis direction, the active pipes are embedded in the cutting concave channel of adjacent base pipes, the base pipes are clamped and bitten by adjacent active pipes, and the active pipes string the base pipes to constitute the tunnel support frame.

[0008] As a preferred mode, the filling medium is filled into the tunnel support frame in the form of filling the base pipe first and then filling the active pipe.

[0009] As a preferred mode, the active pipe is cut into a through opening at the occlusal connection inside the base pipe, the active pipe is through the base pipe, and a stabilizing column is arranged at the corresponding passage in the active pipe.

[0010] As a preferred mode, the filling medium is once cast into the through active pipe and the base pipe. The once casting can form a support structure with better integrity.

[0011] Further preferably, grouting is performed at the outer occlusal connection of the base pipe and the active pipe, and densification treatment is performed.

[0012] Further preferably, the filling medium is concrete or concrete with a steel reinforcement cage or high-strength improved spoil; it is selected according to the specific stratum structure and construction ring.

[0013] Further preferably, the cross section of the base pipe and the active pipe is circular or square or special-shaped; the base pipe and the active pipe are concrete pipes or reinforced concrete pipes or steel pipes. Similarly, according to the construction requirements, the cross-sectional shape and material of the base pipe and the active pipe can be simply improved, and are not limited to the above forms.

[0014] A construction method of the tunnel support structure, which fills the support in the form of filling the base pipe first and then filling the active pipe, or fills the support in the form of filling the base pipe and the active pipe at the same time,

[0015] The filling support in the form of filling the base pipe first and then filling the active pipe is as follows:

[0016] S1: laying the base pipe; according to the support structure design plan, the base pipe is laid along the support structure design contour line by the tunneling equipment, and the base pipes are arranged at intervals;

[0017] S2: filling the base pipe; the filling medium is cast into the base pipe in step S1;

[0018] S3: laying the active pipe; according to the support structure design plan, the active pipe is laid along the support structure design contour line by the tunneling equipment, the tunneling equipment cuts the adjacent base pipe and the internal filling medium to form a cut concave passage in the axial direction of the tunnel, and the active pipe is laid in the cut concave passage of the adjacent base pipe to form an occlusal connection, thereby connecting the base pipes to form a tunnel support frame;

[0019] S4: filling the active pipe; the filling medium is cast into the active pipe in step S2; the tunnel support frame forms a tunnel support structure;

[0020] S5: Constructing the whole tunnel section support structure: the lower tunnel support structure is constructed under the tunnel support structure formed in step S4 to complete the support of the whole tunnel section;

[0021] The support step of filling the foundation pipe and the active pipe simultaneously is as follows:

[0022] B1: Constructing the foundation pipe: according to the support structure design plan, the foundation pipe is constructed along the support structure design contour line by the tunneling equipment, and the foundation pipes are arranged at intervals;

[0023] B2: Constructing the active pipe: according to the support structure design plan, the active pipe is constructed along the support structure design contour line by the tunneling equipment, the tunneling equipment cuts the adjacent foundation pipe and the internal filling medium to form a cutting concave channel in the tunnel axis direction, and the active pipe is constructed in the cutting concave channel of the adjacent foundation pipe to form a clamping connection;

[0024] B3: Constructing the opening between the active pipe and the foundation pipe: the stable column is arranged in the active pipe and corresponds to the clamping position of the foundation pipe, then the pipe wall of the active pipe at the clamping position of the foundation pipe is broken to form an opening, the active pipe and the adjacent foundation pipe form a communication pipe, and a hollow tunnel support frame is formed;

[0025] B4: Internal filling: the filling medium is poured in the hollow tunnel support frame formed in step B3, and the tunnel support frame forms a tunnel support structure;

[0026] B5: Constructing the whole tunnel section support structure: the lower tunnel support structure is constructed under the tunnel support structure formed in step B4 to complete the support of the whole tunnel section.

[0027] The foundation pipe can be constructed synchronously or sequentially, the active pipe can be constructed synchronously or sequentially, and the grouting can be performed to the clamping connection position when the active pipe is constructed or after the construction is completed to ensure the compactness of the connection.

[0028] The tunnel supporting structure of the present application is a pipe curtain supporting structure with occlusal connection, and has various structural forms and clear structural system, and is based on foundation pipes, and the tunnel supporting frame is formed by occlusal connection of the active pipes, and the supporting structure is formed by filling medium in the pipes, and the operation is simple, the occlusal connection between the pipes strengthens the connection integrity of the supporting structure, and the filling medium strengthens the strength of the supporting structure; and the tunnel supporting construction difficulty is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0030] Figure 1 The construction completion schematic view of the foundation pipes with interval;

[0031] Figure 2 The construction completion schematic view of the foundation pipes filled with medium;

[0032] Figure 3 The construction completion schematic view of the tunnel supporting frame formed by occlusal connection of the active pipes and the foundation pipes;

[0033] Figure 4 The construction completion schematic view of the tunnel supporting structure formed by filling medium in the active pipes;

[0034] Figure 5 The construction completion schematic view of the tunnel formed under the supporting structure;

[0035] Figure 6 The schematic view of the tunnel supporting frame formed by occlusal connection of the large-diameter circular active pipes and the foundation pipes;

[0036] Figure 7 The construction completion schematic view of the sectional filling and communication pipe;

[0037] Figure 8 The construction completion schematic view of the tunnel supporting structure in the form of large and small circular pipes;

[0038] Figure 9 The schematic view of the occlusal pipe supporting structure in different combination forms;

[0039] Figure 10 Structure diagram of single active pipe occlusively connecting single foundation pipe;

[0040] Figure 11 Structure diagram of active pipe occlusively connecting adjacent pipes in turn;

[0041] Figure 12 Structure diagram of tunnel support structure in the form of occlusively connecting pipes in turn. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application.

[0043] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "vertical", "horizontal", "upper", "lower", "front", "back", "left", "right", "horizontal", "top", "bottom", "inner", "outer" and the like 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, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0044] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] As Figure 3As shown in the embodiment 1, a tunnel support structure comprises a plurality of base pipes 2 and active pipes 3 supported in the stratum 20, the base pipes being one or more and arranged along the designed support contour line and mainly serving the positioning purpose. The base pipes can be filled with medium before the formation of the interlocking connection or after the formation of the interlocking connection. The active pipes are one or more and arranged along the designed support contour line and cut the adjacent pipes along the tunnel axis direction to form the interlocking connection string and constitute the whole tunnel support frame, the active pipes being interlocked in the openings of the adjacent pipes and mainly serving the connecting purpose. The active pipes 3 are connected to the adjacent pipes in the interlocking cutting manner, the interlocking connection between the pipes strengthens the connecting integrity of the support structure; the adjacent two pipes are intersected to form the tunnel support frame 1 in the interlocking stringing manner, and the tunnel support frame is provided with the filling medium 6 to form the tunnel support structure. The filling medium strengthens the strength of the support structure; the tunnel support structure can be the whole tunnel cross section support structure or a part of the whole tunnel cross section support structure, and is selected according to the tunnel cross section structure.

[0046] As a preferred scheme in the embodiment, the base pipes 2 are arranged in the stratum 20 along the tunnel axis direction and are arranged along the designed contour line direction at intervals, that is, the adjacent two base pipes 2 are arranged at intervals, and the interval distance is less than the pipe diameter of the active pipe 3 to form the base pipe-active pipe-base pipe interlocking form. It should be noted that, as shown in the embodiment 2, when the interval distance is greater than the pipe diameter of the active pipe 3, the base pipe-active pipe-active pipe-base pipe interlocking form can be adopted. The base pipe is taken as the base point, the active pipes are arranged adjacent to each other along the designed contour line of the support structure and are interlocked in sequence, and finally the support structure is formed, which better ensures the precision of the support design axis. The base pipe-active pipe-base pipe interlocking form is taken as an example for description in the embodiment. Figure 12

[0047] As a preferred scheme in the embodiment, as shown in the embodiment 3, the tunneling equipment cuts the base pipe 2 to form the cutting concave channel along the tunnel axis direction, the active pipe 3 is embedded in the cutting concave channel of the adjacent base pipe 2, the base pipe 2 is clamped and interlocked by the adjacent active pipe 3, and the active pipe 3 strings the base pipe 2 to constitute the tunnel support frame 1. That is, the tunneling equipment first cuts the adjacent base pipe 2 to form the cutting concave which can fix the active pipe 3, then the active pipe is arranged in the adjacent base pipe 2 to form the embedded connection, the active pipe is stably held by the interlocking clamping of the adjacent base pipe, the interval active pipe clamps and holds the common base pipe in the middle, and thus the pipe stringing and the interlocking clamping and holding of the pipes are formed, which strengthens the connecting integrity of the support structure. Figure 11

[0048] The grouting is performed at the outer interlocking connection of the base pipe 2 and the active pipe 3 to perform the compaction treatment. That is, the interlocking connection of the tunnel support frame can be grouted to ensure the compaction degree of the connection; the pipes at the two ends of the tunnel support frame can be grouted to the surrounding stratum to ensure the stability and the bearing capacity of the end part. ​​

[0049] The filling medium 6 is concrete, concrete with an internal reinforcing cage, or high-strength modified slag. The preferred filling medium is concrete with an internal reinforcing cage, i.e., a reinforced concrete structure, where the reinforcing members can cross the interlocking points of adjacent pipes, resulting in higher strength at the joints.

[0050] As a preferred embodiment, the cross-section of the base pipe 2 is circular, square, or irregular; the base pipe 2 is a concrete pipe, reinforced concrete pipe, or steel pipe. The cross-section of the active pipe 3 is circular, square, or irregular; the active pipe 3 is a concrete pipe, reinforced concrete pipe, or steel pipe. That is to say, the pipe size can be large or small; the pipe shape can be circular, square, or irregular; the pipe material can be concrete, reinforced concrete, steel, etc.; the selection is based on the geological conditions and specific working conditions. Figure 9 As shown, different interlocking pipe curtain structures can be formed, such as circular active pipe + rectangular base pipe, rectangular active pipe + circular base pipe, etc.

[0051] Example 2: A tunnel support structure. In this example, the active pipe 3 remains intact, and the filling medium 6 is filled into the tunnel support frame 1 by first filling the foundation pipe 2 and then filling the active pipe 3. That is, after the foundation pipe 2 is constructed, the filling medium is poured into the foundation pipe 2, and then the active pipe 3 is constructed.

[0052] Example 3: A tunnel support structure. In this example, the interlocking connection between the active pipe 3 and the foundation pipe 2 is cut into an opening 8, allowing the active pipe 3 and the foundation pipe 2 to be continuous. A stabilizing column 7 is installed at the corresponding channel 8 within the active pipe 3. The filling medium 6 is poured into the continuous active pipe 3 and foundation pipe 2 in one go. The active pipe can be segmented by breaking its wall and filling it with the medium. If the active pipe has only one opening, it can be stabilized by its own structure. When breaking the wall in multiple segments, each active pipe has two openings, making its own structure unstable. Stabilizing columns need to be added to maintain its stability before the filling medium is poured in uniformly. After the active pipe is completed and filled with the medium, the pipe wall at the interlocking point of the active pipe can be opened to form a continuous pipe filled with the medium, improving the overall stability of the support structure.

[0053] Example 4: A construction method for the tunnel support structure, wherein the support is filled by first filling the foundation pipe 2 and then filling the active pipe 3, or by simultaneously filling the foundation pipe 2 and the active pipe 3.

[0054] The support filling steps, which involve filling the foundation pipe 2 first and then the active pipe 3, are as follows:

[0055] S1 foundation pipe: such as Figure 1 As shown, according to the design plan of the support structure, the foundation pipes are constructed along the design outline of the support structure using tunneling equipment. The foundation pipes are arranged at intervals in the stratum. The foundation pipes can be constructed simultaneously or sequentially.

[0056] S2 filling the base pipe: as shown in Figure 2 Pouring filling medium into the base pipe in step S1; the filling medium can be concrete, steel reinforcement cage + concrete, high-strength improved soil, etc., which meets the support requirements.

[0057] S3 applying the active pipe: as shown in Figure 3 According to the support structure design plan, the active pipe is applied by the tunneling equipment along the support structure design contour line, the tunneling equipment cuts the adjacent base pipe and the filling medium inside the base pipe along the tunnel axis direction to form a cutting concave channel, and the active pipe is applied in the cutting concave channel of the adjacent base pipe to form a clamping connection, so as to connect the base pipes to form a tunnel support frame. The active pipe is embedded in the cutting concave channel of the adjacent base pipe to form an embedded connection, and the active pipe is clamped and held stably by the adjacent base pipe, and the interval active pipe clamps and holds the common base pipe in the middle, so that the pipe-pipe connection and the pipe-pipe clamping and holding stability are formed, and the connection integrity of the support structure is strengthened.

[0058] S4 filling the active pipe: as shown in Figure 4 Pouring filling medium into the active pipe in step S2; the tunnel support frame forms a tunnel support structure; the tunnel support frame is poured with filling medium by filling the base pipe 2 first and then filling the active pipe 3, and finally forms a tunnel support structure.

[0059] S5 applying the entire tunnel cross-section support structure: as shown in Figure 5 The lower part of the tunnel support structure formed in step S4 is applied to complete the support of the entire tunnel cross-section. The tunnel support structure can be used as the vault part of the entire tunnel cross-section support structure, or a ring-shaped tunnel support structure can be applied to form the entire tunnel cross-section support structure. When the tunnel support structure is used as the vault part of the entire tunnel cross-section support structure, the tunnel area is excavated after the strength of the tunnel support structure meets the requirements, and the lower support structure is applied to complete the construction of the entire tunnel cross-section support structure.

[0060] The filling support steps of filling the base pipe 2 and the active pipe 3 at the same time are as follows:

[0061] B1 applying the base pipe: according to the support structure design plan, the base pipe is applied by the tunneling equipment along the support structure design contour line, and the base pipes are arranged at intervals; the base pipes can be applied synchronously or sequentially.

[0062] B2 applying the active pipe: as shown in Figure 6 According to the support structure design plan, the active pipe is applied by the tunneling equipment along the support structure design contour line, the tunneling equipment cuts the adjacent base pipe and the filling medium inside the base pipe along the tunnel axis direction to form a cutting concave channel, and the active pipe is applied in the cutting concave channel of the adjacent base pipe to form a clamping connection;

[0063] B3: Establishing the communication between the active pipe and the foundation pipe: As shown in Figure 7 FIG. 3, a stabilizing column is arranged in the active pipe and corresponds to the position of the engagement of the foundation pipe, then the pipe wall of the active pipe at the position of the engagement of the foundation pipe is broken to form a communication, so that the active pipe and the adjacent foundation pipe form a communication pipe, and a hollow tunnel support frame is formed;

[0064] B4: Filling: As shown in Figure 8 FIG. 4, a filling medium is cast in the hollow tunnel support frame formed in step B3, and the tunnel support frame forms a tunnel support structure.

[0065] B5: Establishing the entire tunnel section support structure: The lower tunnel support structure is established under the tunnel support structure formed in step B4 to complete the support of the entire tunnel section. The tunnel support structure can be the vault of the entire tunnel section support structure, or a ring-shaped tunnel support structure can be established to form the entire tunnel section support structure. When the tunnel support structure is the vault of the entire tunnel section support structure, after the strength of the tunnel support structure meets the requirements, the tunnel area is excavated, and the lower support structure is established to complete the construction of the entire tunnel section support structure.

[0066] In the above process, the active pipe and the foundation pipe can be established synchronously or sequentially. As shown in Figure 10 FIG. 5, a single active pipe is engaged with a single foundation pipe; and grouting can be performed at the engaged position when the active pipe is established or after the establishment of the active pipe to ensure the compactness of the connection. The pipes at both ends of the tunnel support frame can be grouted to ensure the stability and bearing capacity of the end portions.

[0067] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method of construction of a tunnel support structure characterised in that: The tunnel support structure comprises a plurality of foundation pipes (2) and active pipes (3) supported in the stratum (20), the active pipes (3) are connected with adjacent pipes in a cutting engagement mode, two adjacent pipes intersect to form a tunnel support frame (1) in a embedded and fixed series connection mode, and a filling medium (6) is arranged in the tunnel support frame to form the tunnel support structure; a tunneling equipment cuts the foundation pipes (2) to form a cutting concave channel along the tunnel axis direction, the active pipe (3) is embedded in the cutting concave channel of the adjacent foundation pipe (2), the foundation pipe (2) is clamped and engaged by the adjacent active pipe (3), and the active pipe (3) strings the foundation pipe (2) to form the tunnel support frame (1); The support is filled in a mode of filling the foundation pipe (2) first and then filling the active pipe (3) or in a mode of filling the foundation pipe (2) and the active pipe (3) simultaneously; The support is filled in the mode of filling the foundation pipe (2) first and then filling the active pipe (3) as follows: S1: laying foundation pipes, according to the support structure design plan, laying the foundation pipes along the support structure design contour line by the tunneling equipment, and the foundation pipes are arranged at intervals; S2: filling the foundation pipes, pouring the filling medium into the foundation pipes in step S1; S3: laying active pipes, according to the support structure design plan, laying the active pipes along the support structure design contour line by the tunneling equipment, cutting the adjacent foundation pipes and the filling medium in the foundation pipes to form a cutting concave channel along the tunnel axis direction by the tunneling equipment, and laying the active pipes in the cutting concave channel of the adjacent foundation pipes to form an engagement connection, so as to string the foundation pipes to form the tunnel support frame; S4: filling the active pipes, pouring the filling medium into the active pipes in step S2; and the tunnel support frame forms the tunnel support structure; S5: laying the entire tunnel section support structure, laying the tunnel lower support structure at the lower part of the tunnel support structure formed in step S4 to complete the support of the entire tunnel section; The support is filled in the mode of filling the foundation pipe (2) and the active pipe (3) simultaneously as follows: B1: laying foundation pipes, according to the support structure design plan, laying the foundation pipes along the support structure design contour line by the tunneling equipment, and the foundation pipes are arranged at intervals; B2: laying active pipes, according to the support structure design plan, laying the active pipes along the support structure design contour line by the tunneling equipment, cutting the adjacent foundation pipes and the filling medium in the foundation pipes to form a cutting concave channel along the tunnel axis direction by the tunneling equipment, and laying the active pipes in the cutting concave channel of the adjacent foundation pipes to form an engagement connection; B3: laying the through opening between the active pipe and the foundation pipe, arranging a stabilizing column in the active pipe and corresponding to the engagement position of the foundation pipe, then breaking the pipe wall of the active pipe at the engagement position of the foundation pipe to form a through opening, so that the active pipe and the adjacent foundation pipe form a communication pipe and form a hollow tunnel support frame; B4: internal filling, pouring the filling medium into the hollow tunnel support frame formed in step B3, and the tunnel support frame forms the tunnel support structure; B5: laying the entire tunnel section support structure, laying the tunnel lower support structure at the lower part of the tunnel support structure formed in step B4 to complete the support of the entire tunnel section.

2. The method of constructing a tunnel support structure according to claim 1, wherein: The foundation pipe can be simultaneously or sequentially applied; the active pipe can be simultaneously or sequentially applied; the active pipe can be applied or completed to inject grout to the occlusal connection to ensure the connection density.

3. The method of constructing a tunnel support structure according to claim 1, wherein: The foundation pipe (2) is arranged along the tunnel axis direction in the stratum (20), and two adjacent foundation pipes (2) are arranged at intervals, and the interval distance is less than the pipe diameter of the active pipe (3).

4. The method of constructing a tunnel support structure according to claim 1, wherein: The filling medium (6) is filled into the tunnel support frame (1) in the form of filling the foundation pipe (2) first and then filling the active pipe (3).

5. The method of constructing a tunnel support structure according to claim 1, wherein: The occlusal connection between the active pipe (3) and the foundation pipe (2) is cut into a through opening (8), the active pipe (3) and the foundation pipe (2) are penetrated, and the active pipe (3) is provided with a stabilizing column (7) corresponding to the through opening (8); the filling medium (6) is once poured into the penetrated active pipe (3) and the foundation pipe (2).

6. The method of constructing a tunnel support structure according to claim 1, wherein: Grouting is performed at the outer occlusal connection of the foundation pipe (2) and the active pipe (3) to perform compaction treatment.

7. The method of constructing a tunnel support structure according to claim 1, wherein: The filling medium (6) is concrete or concrete with a steel cage or high-strength improved spoil.

8. The method of constructing a tunnel support structure according to claim 1, wherein: The cross section of the foundation pipe (2) and the active pipe (3) is circular or square or special-shaped; the foundation pipe (2) and the active pipe (3) are concrete pipes or reinforced concrete pipes or steel pipes.

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