Construction method for pouring concrete in gap between steel pipe and pipe segment in shield tunnel

Abstract

The application belongs to the technical field of tunnel construction, and discloses a construction method for pouring concrete between a steel pipe and a pipe piece in a shield tunnel. When pouring concrete mortar into the gap, first, the annular pouring cavity is divided into multiple sub-chambers, and a flow guide structure is arranged in each sub-chamber, so that the concrete mortar in the sub-chamber can be partially pressed on the top of the steel pipe, and part of the concrete mortar flows into the bottom of the sub-chamber through the flow guide opening of the flow guide structure, and the multiple sub-chambers are sequentially poured along the axial direction of the steel pipe. The concrete mortar pressed on the top of the steel pipe provides downward pressure on the steel pipe, which is used to resist the buoyancy of the concrete mortar at the bottom of the sub-chamber on the steel pipe, so that the buoyancy on the steel pipe can be effectively reduced, the deformation and damage of the steel pipe caused by upward floating can be prevented, economic losses can be avoided, and the construction period can be ensured.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, and in particular to a construction method for pouring concrete into the gap between steel pipes and tunnel segments in a shield tunnel. Background Technology

[0002] After the shield tunnel is completed, it is necessary to line the tunnel with segments and steel pipes inside the segment tunnel of the shield. The steel pipes and segments are set at intervals along the circumference, thus forming an annular space between the steel pipes and segments. This annular space needs to be filled with concrete mortar so that the steel pipes and segments can bond together to form a composite whole structure, jointly bearing external loads and improving the stability of the structure.

[0003] In existing technologies, concrete supports are typically poured at the bottom of the tunnel, and steel pipes are fixed to these supports, creating an annular space between the steel pipe and the tunnel lining segments. This annular space extends axially along the steel pipe. Grouting is generally performed using a compartmentalized method, dividing the annular space into multiple filling chambers, into which concrete mortar is injected sequentially. However, because the annular space extends axially along the steel pipe and runs through the entire tunnel, and both the inner diameter of the tunnel lining segments and the outer diameter of the steel pipe are relatively large, even if the length of the filling chamber is set to a unit length, a large amount of concrete needs to be injected into the chamber. This causes the steel pipe to float due to the enormous buoyancy, leading to deformation and damage, resulting in economic losses and delays in the construction period. Furthermore, the actual axis of the tunnel steel pipe deviates from the original design axis, causing uneven circumferential thickness distribution in the annular space, thus affecting the overall structural load-bearing capacity. Summary of the Invention

[0004] The purpose of this invention is to provide a construction method for pouring concrete between steel pipes and segments in shield tunnels. This method can effectively reduce the buoyancy of the steel pipes, prevent deformation and damage, avoid economic losses, ensure the construction period, and avoid affecting the overall structure's load-bearing capacity.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A construction method for pouring concrete between steel pipes and tunnel segments in a shield tunnel is provided, comprising the following steps:

[0007] S1. A temporary support is constructed at the bottom of the shield tunnel. The temporary support is configured to install steel pipes. The steel pipes are spaced apart from the tunnel segments along the circumference. The steel pipes and the tunnel segments enclose an annular casting cavity.

[0008] S2. Multiple partitions are sleeved on the outer wall of the steel pipe at first preset length intervals, and the multiple partitions divide the annular casting cavity into multiple sub-chambers.

[0009] S3. Each of the chambers is provided with a flow guiding structure, which includes multiple flow guiding components of a first preset length. The multiple flow guiding components are arranged on both sides of the steel pipe with the vertical central axis of the steel pipe as the axis of symmetry. The multiple flow guiding components on any side of the steel pipe are arranged at vertical intervals to divide multiple casting chambers on any side of the steel pipe. One end of the flow guiding component is connected to the outer wall of the steel pipe, and the other end extends upward at a preset angle in a direction away from the centroid of the steel pipe. The flow guiding component has a flow guiding port, and two adjacent casting chambers are connected through the flow guiding port.

[0010] S4. Set the end chamber as the target chamber and adjust the pressure in the target chamber to a first preset pressure value;

[0011] S5. Pour concrete mortar into the casting cavity at the top of the target cavity, so that part of the concrete mortar flows downward into the casting cavity below the casting cavity through the guide port of the guide component corresponding to the casting cavity.

[0012] S6. Continuously pour concrete mortar into the casting cavity at the top of the target cavity until the target cavity is filled with concrete mortar.

[0013] S7. Adjust the pressure in the target chamber to a second preset pressure value, where the second preset pressure value is greater than the first preset pressure value, so as to expel air bubbles from the concrete mortar.

[0014] S8. Along the extension direction of the steel pipe, the sub-chamber adjacent to the already poured sub-chamber is set as the new target chamber, and the above steps S5 to S7 are repeated until the annular pouring cavity is filled with concrete mortar.

[0015] Optionally, the flow guiding assembly includes multiple flow guiding plates, which are sequentially spliced ​​along the axial direction of the steel pipe, and adjacent two flow guiding plates are stacked with a second preset length. One side of the flow guiding plate is connected to the outer wall of the steel pipe, and the other side extends upward at the preset angle in a direction away from the centroid of the steel pipe. The flow guiding port is opened on the side of the flow guiding plate away from the steel pipe.

[0016] Optionally, the ratio of the width of the flow guide to the width of the flow guide plate is greater than or equal to 0.1 and less than or equal to 0.3.

[0017] Optionally, the inner wall of the segment is provided with a plurality of pressure detection elements along the circumferential direction, and a pressure detection element is provided at the vertical height corresponding to the top of each casting cavity, and at least one pressure detection element is provided at the top of the segment. Step S6 specifically includes the following steps:

[0018] S61. Continuously pour concrete mortar into the casting cavity at the top of the target cavity, so that some of the concrete mortar continuously flows from top to bottom into the multiple casting cavities below the casting cavity;

[0019] S62. Determine whether all of the pressure detection elements have detected pressure. If not, return to execute S61; if yes, execute S63.

[0020] S63. Stop the pouring work on the target chamber, which is filled with concrete mortar.

[0021] Optionally, the pressure detection element includes a pressure sensor.

[0022] Optionally, step S80 is executed after step S7 and before step S8, and step S80 specifically includes the following steps:

[0023] S80. Use cleaning equipment to clean the grouting pipes of the grouting equipment.

[0024] Optionally, step S8 specifically includes the following steps:

[0025] S81. Along the extension direction of the steel pipe, the sub-chamber adjacent to the already poured sub-chamber is set as a new target chamber, and a grouting port is opened on the top wall of the steel pipe corresponding to the new target chamber.

[0026] S82. Pass the grouting pipe of the grouting equipment through the grouting port and extend it into the casting cavity at the top of the target chamber;

[0027] S83. Repeat steps S5 to S7 above to fill the next compartment along the extension direction of the steel pipe;

[0028] S84. Repeat steps S81 to S83 until the annular casting cavity is filled with concrete mortar.

[0029] Optionally, the separator includes a rubber fiber composite diaphragm.

[0030] Optionally, the preset angle is greater than or equal to 15° and less than or equal to 45°.

[0031] Optionally, the first preset pressure value is -0.02MPa, and the second preset pressure value is 0.05MPa.

[0032] The beneficial effects of this invention are:

[0033] This invention provides a construction method for pouring concrete between steel pipes and tunnel segments in a shield tunnel. After the tunnel segments are lined, temporary supports are constructed at the bottom of the tunnel, extending axially along the tunnel. The steel pipes are inserted into the tunnel and fixed to the temporary supports, thus forming an annular pouring cavity with the tunnel segments. Multiple separators are then fitted onto the outer wall of the steel pipes at first preset length intervals, dividing the annular pouring cavity into multiple sub-chambers. Each sub-chamber is equipped with a flow guiding structure. The sub-chamber located at the tunnel end (i.e., the beginning or end of the tunnel) is designated as the target chamber. The pressure within the target chamber is adjusted to a first preset pressure value. Then, concrete is poured into the uppermost part of the target chamber. When pouring concrete mortar, since the two adjacent pouring chambers are connected through the guide port of the guide component, part of the poured concrete mortar will remain in the uppermost pouring chamber and be pressed onto the top of the steel pipe and the guide component. The other part of the concrete mortar will flow down through the guide port into the pouring chamber below the uppermost pouring chamber. Concrete mortar will be continuously injected into the pouring chamber until the target chamber is filled. At this time, the pressure of the target chamber is adjusted to the second preset pressure value to promote the expulsion of air bubbles in the concrete mortar and ensure the compactness of the concrete filling. Finally, the adjacent chambers of the poured chambers are set as new target chambers, and the above operation is repeated until the annular pouring chamber is filled with concrete mortar.

[0034] By setting up a flow-guiding structure, a portion of the concrete poured into the sub-cavity flows from top to bottom, while the other portion is pressed against the top of the steel pipe. This downward pressure on the steel pipe counteracts the buoyancy of the concrete mortar in the lower cavity, effectively reducing the buoyancy and preventing deformation and damage caused by floating, thus avoiding economic losses and ensuring the construction schedule. It also prevents the actual axis of the steel pipe from deviating from the original design axis, ensuring a uniform thickness distribution along the circumference of the annular space and preventing any impact on the overall structural load-bearing capacity. Furthermore, using this construction method, pouring concrete mortar into the annular cavity does not require interrupting the pouring process after a portion is poured, waiting for the concrete mortar in the lower cavity to initially bond with the steel pipe before continuing. This allows for continuous injection of concrete mortar into the annular cavity, improving construction efficiency. Attached Figure Description

[0035] Figure 1 This is a flowchart of a construction method for pouring concrete between steel pipes and tunnel segments in a shield tunnel, as provided in an embodiment of the present invention.

[0036] Figure 2 This is a schematic diagram of the structure provided in an embodiment of the present invention when a flow guiding structure is provided in the chamber;

[0037] Figure 3 This is a structural schematic diagram of the concrete pouring direction provided in an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of the structure of the compartment filled with concrete mortar according to an embodiment of the present invention;

[0039] Figure 5 This is a schematic diagram of the structure of the guide plate provided in an embodiment of the present invention.

[0040] In the picture:

[0041] 100. Steel pipe; 200. Segment;

[0042] 1. Temporary support;

[0043] 2. Annular casting cavity; 21. Sub-chamber; 22. Casting cavity;

[0044] 3. Dividers;

[0045] 4. Flow guiding structure; 41. Flow guiding component; 42. Flow guiding plate; 421. Flow guiding port;

[0046] 5. Pressure testing components. Detailed Implementation

[0047] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0048] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0050] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0051] This embodiment provides a construction method for pouring concrete between the steel pipe and the tunnel lining segments inside a shield tunnel, such as... Figures 1 to 5 As shown, using this construction method to fill the concrete mortar can effectively reduce the buoyancy of the steel pipe 100, prevent the steel pipe 100 from deforming and being damaged, avoid economic losses, ensure the construction period, and avoid affecting the load-bearing capacity of the overall structure.

[0052] The construction method for pouring concrete between the steel pipe and the tunnel lining segments inside a shield tunnel includes the following steps:

[0053] S1, see reference Figure 1 and Figure 2 As shown, a temporary support 1 is constructed at the bottom of the shield tunnel. The temporary support 1 is configured to install a steel pipe 100. The steel pipe 100 is spaced apart from the segment 200 along the circumference. The steel pipe 100 and the segment 200 surround each other to form an annular casting cavity 2.

[0054] S2, see reference Figure 1 , Figure 2 and Figure 3 As shown, multiple partitions 3 are sleeved on the outer wall of the steel pipe 100 at intervals of a first preset length, and the multiple partitions 3 divide the annular casting cavity 2 into multiple sub-chambers 21.

[0055] S3, see reference Figure 1 and Figure 2 As shown, each chamber 21 is provided with a flow guiding structure 4. The flow guiding structure 4 includes multiple flow guiding components 41 of a first preset length. The multiple flow guiding components 41 are arranged on both sides of the steel pipe 100 with the vertical central axis of the steel pipe 100 as the axis of symmetry. The multiple flow guiding components 41 on any side of the steel pipe 100 are arranged vertically at intervals to divide multiple casting chambers 22 on any side of the steel pipe 100. One end of the flow guiding component 41 is connected to the outer wall of the steel pipe 100, and the other end extends upward at a preset angle in a direction away from the centroid of the steel pipe 100. The flow guiding component 41 has a flow guiding port 421, and two adjacent casting chambers 22 are connected through the flow guiding port 421.

[0056] S4, see reference Figure 1 As shown, the end chamber 21 is set as the target chamber, and the pressure in the target chamber is adjusted to the first preset pressure value;

[0057] S5, see reference Figure 1 As shown, concrete mortar is poured into the casting cavity 22 at the top of the target cavity, so that part of the concrete mortar flows downward into the casting cavity 22 below the casting cavity 22 through the guide port 421 of the guide component 41 corresponding to the casting cavity 22.

[0058] S6, see reference Figure 1 and Figure 4 As shown, concrete mortar is continuously poured into the casting cavity 22 at the top of the target cavity until the target cavity is filled with concrete mortar.

[0059] S7, see reference Figure 1 As shown, the pressure in the target chamber is adjusted to a second preset pressure value, which is greater than the first preset pressure value, so that air bubbles in the concrete mortar can be expelled.

[0060] S8, see reference Figure 1 and Figure 3 As shown, along the extension direction of the steel pipe 100, the sub-chamber 21 adjacent to the already poured sub-chamber 21 is set as the new target chamber, and the above steps S5 to S7 are repeated until the annular pouring chamber 2 is filled with concrete mortar.

[0061] After the tunnel lining segments 200 are installed inside the shield tunnel, temporary supports 1 are constructed at the bottom of the tunnel. The temporary supports 1 extend axially along the tunnel, through which steel pipes 100 are inserted and fixed to the temporary supports 1, thus forming an annular casting cavity 2 with the steel pipes 100 and the tunnel lining segments 200. Then, multiple separators 3 are fitted onto the outer wall of the steel pipes 100 at first preset length intervals, dividing the annular casting cavity 2 into multiple sub-chambers 21. Each sub-chamber 21 is equipped with a flow guiding structure 4. The sub-chamber 21 located at the tunnel end (i.e., the beginning or end of the tunnel) is designated as the target chamber. The pressure inside the target chamber is adjusted to a first preset pressure value. Then, concrete mortar is poured into the uppermost casting cavity 22 of the target chamber. Because adjacent... Each pouring chamber 22 is connected through the guide port 421 of the guide component 41. Therefore, part of the poured concrete mortar will remain in the uppermost pouring chamber 22 and be pressed against the top of the steel pipe 100 and the guide component 41. The other part of the concrete mortar will flow down through the guide port 421 into the pouring chamber 22 below the pouring chamber 22. Concrete mortar will be continuously injected into the pouring chamber 22 until the target chamber is filled. At this time, the pressure of the target chamber is adjusted to the second preset pressure value to promote the expulsion of air bubbles in the concrete mortar and ensure the compactness of the concrete filling. Finally, the adjacent sub-chambers 21 that have been poured are set as new target chambers, and the above operation is repeated until the annular pouring chamber 2 is filled with concrete mortar.

[0062] By setting up the flow guiding structure 4, a portion of the concrete poured in the sub-chamber 21 can flow from top to bottom, while the other portion is pressed against the top of the steel pipe 100. This causes the steel pipe 100 to be subjected to downward pressure, which resists the buoyancy of the concrete mortar in the lower pouring chamber 22. This effectively reduces the buoyancy of the steel pipe 100, preventing deformation and damage caused by upward floating, avoiding economic losses, ensuring the construction period, and preventing the actual axis of the steel pipe 100 from deviating from the original design axis. This ensures that the thickness distribution of the annular space is uniform along the circumference, thus avoiding affecting the overall load-bearing capacity of the structure. In addition, using this construction method to pour concrete mortar into the annular pouring chamber 2, there is no need to interrupt the pouring after pouring a portion of the concrete mortar and wait for the concrete mortar in the lower part of the sub-chamber 21 to form a preliminary bond with the steel pipe 100 before continuing the pouring. Concrete mortar can be continuously injected into the annular pouring chamber 2, thereby improving the construction efficiency.

[0063] It should be noted that the two casting cavities 22 divided by the uppermost flow guiding components 41 on both sides of the steel pipe 100 are interconnected.

[0064] In this embodiment, the preset angle is greater than or equal to 15° and less than or equal to 45°, the first preset pressure value is -0.02MPa, and the second preset pressure value is 0.05MPa.

[0065] For example, the separator 3 includes a rubber fiber composite diaphragm with a preset angle of 30°.

[0066] Optionally, such as Figure 2 and Figure 5 As shown, the flow guiding assembly 41 includes multiple flow guiding plates 42. The multiple flow guiding plates 42 are sequentially spliced ​​along the axial direction of the steel pipe 100, and adjacent two flow guiding plates 42 are stacked with a second preset length. One side of the flow guiding plate 42 is connected to the outer wall of the steel pipe 100, and the other side extends upward at a preset angle in a direction away from the centroid of the steel pipe 100, and a flow guiding port 421 is opened on the side of the flow guiding plate 42 away from the steel pipe 100. By sequentially splicing multiple guide plates 42, a guide assembly 41 of the first preset length is formed. The guide plates 42 are connected to the steel pipe 100 at a preset angle to form a V-shaped guide channel, allowing the poured concrete mortar to flow along the guide channel. A guide port 421 is opened on the side of the guide plate 42 away from the steel pipe 100. Therefore, part of the concrete mortar in the guide channel can accumulate on the inner side of the guide channel (i.e., the side of the guide plate 42 close to the steel pipe 100). The concrete mortar accumulated on the inner side of the guide channel will provide downward pressure to the steel pipe 100 to resist buoyancy. The other part can flow into the pouring cavity 22 below through the guide port 421 to realize the pouring work of the entire sub-chamber 21.

[0067] Optionally, the ratio of the width of the guide port 421 to the width of the guide plate 42 is greater than or equal to 0.1 and less than or equal to 0.3. By setting the ratio of the width of the guide port 421 to the width of the guide plate 42, some concrete mortar can flow into the lower pouring cavity 22 through the guide port 421, while preventing all concrete from flowing into the lower pouring cavity 22 from top to bottom due to the guide port 421 being too large. This ensures that the outer wall of the steel pipe 100 can be supported by the weight of some of the concrete mortar, thereby preventing the steel pipe 100 from floating due to excessive buoyancy and avoiding deformation and damage to the steel pipe 100.

[0068] For example, the width of the flow guide 421 is 360mm and the width of the flow guide plate 42 is 1200mm, so the ratio of the width of the flow guide 421 to the width of the flow guide plate 42 is 0.3.

[0069] Optionally, the inner wall of the segment 200 is provided with multiple pressure sensing elements 5 (such as...) circumferentially. Figure 2 (As shown). A pressure detection element 5 is installed at the vertical height corresponding to the top of each casting cavity 22, and at least one pressure detection element 5 is installed at the top of the segment 200. Step S6 specifically includes the following steps:

[0070] S61. Continuously pour concrete mortar into the pouring cavity 22 at the top of the target cavity, so that some of the concrete mortar continuously flows from top to bottom into multiple pouring cavities 22 below the pouring cavity 22.

[0071] S62. Determine whether all pressure detection elements 5 have detected pressure. If not, return to execute S61. If yes, execute S63.

[0072] S63. Stop pouring the concrete into the target chamber, which is now filled with concrete mortar.

[0073] As concrete mortar is continuously poured into the uppermost pouring cavity 22 of the target chamber, some of the concrete mortar flows continuously from top to bottom into multiple pouring cavities 22 below it. When each pouring cavity 22 is filled with concrete mortar, the concrete mortar will press against the pressure detection element 5 at the corresponding vertical height at the top of the pouring cavity 22, allowing the pressure detection element 5 to detect pressure. When the concrete mortar presses against the pressure detection element 5 at the top of the segment 200 and causes it to be compressed, it indicates that the entire target chamber is filled with concrete mortar. It is determined whether all multiple pressure detection elements 5 have detected pressure. If so, the pouring work is stopped; if not, concrete mortar continues to be poured into the uppermost pouring cavity 22 of the target chamber until the entire target chamber is filled with concrete mortar.

[0074] In this embodiment, two pressure detection elements 5 are provided on the top of the tube segment 200. In other embodiments, other numbers of pressure detection elements 5 may be provided as needed, and this is not limited here.

[0075] For example, the pressure detection element 5 includes a pressure sensor.

[0076] Optionally, step S80 is executed after step S7 and before step S8, and step S80 specifically includes the following steps:

[0077] S80. Use cleaning equipment to clean the grouting pipes of the grouting equipment.

[0078] After each pouring of the target chamber, the grouting pipe is cleaned to prevent blockage caused by concrete residue and ensure the smooth progress of the grouting work.

[0079] For example, the cleaning equipment includes a high-pressure water gun.

[0080] Optionally, step S8 specifically includes the following steps:

[0081] S81. Along the extension direction of the steel pipe 100, the sub-chamber 21 adjacent to the already poured sub-chamber 21 is set as the new target chamber, and a grouting port is opened on the top wall of the steel pipe 100 corresponding to the new target chamber.

[0082] S82. Pass the grouting pipe of the grouting equipment through the grouting port and extend it into the casting cavity 22 at the top of the target chamber;

[0083] S83. Repeat steps S5 to S7 above to fill the next sub-chamber 21 along the extension direction of the steel pipe 100.

[0084] S84. Repeat steps S81 to S83 until the annular pouring cavity 2 is filled with concrete mortar.

[0085] It should be noted that after the grouting of the target chamber is completed, the grouting pipe of the grouting equipment should be removed from the target chamber and the grouting port should be sealed.

[0086] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A construction method for pouring concrete between steel pipes and tunnel segments in a shield tunnel, characterized in that, Includes the following steps: S1. A temporary support (1) is constructed at the bottom of the shield tunnel. The temporary support (1) is configured to install a steel pipe (100). The steel pipe (100) is spaced apart from the pipe segment (200) in the circumferential direction. The steel pipe (100) and the pipe segment (200) surround each other to form an annular casting cavity (2). S2. Multiple partitions (3) are fitted on the outer wall of the steel pipe (100) at a first preset length interval, and the multiple partitions (3) divide the annular casting cavity (2) into multiple sub-chambers (21). S3. Each of the chambers (21) is provided with a flow guiding structure (4). The flow guiding structure (4) includes multiple flow guiding components (41) of a first preset length. The multiple flow guiding components (41) are arranged on both sides of the steel pipe (100) with the vertical central axis of the steel pipe (100) as the axis of symmetry. The multiple flow guiding components (41) on any side of the steel pipe (100) are arranged vertically at intervals to divide multiple casting cavities (22) on any side of the steel pipe (100). One end of the flow guiding component (41) is connected to the outer wall of the steel pipe (100), and the other end extends upward at a preset angle in a direction away from the centroid of the steel pipe (100). The flow guiding component (41) is provided with a flow guiding port (421). Two adjacent casting cavities (22) are connected through the flow guiding port (421). S4. Set the end chamber (21) as the target chamber; S5. Adjust the pressure in the target chamber to the first preset pressure value, and pour concrete mortar into the uppermost pouring chamber (22) of the target chamber, so that part of the concrete mortar flows down into the pouring chamber (22) below the pouring chamber (22) through the guide port (421) of the guide component (41) corresponding to the pouring chamber (22), and the other part will remain in the uppermost pouring chamber (22) and press on the top of the steel pipe (100) and the guide component (41); S6. Continuously pour concrete mortar into the casting cavity (22) at the top of the target cavity until the target cavity is filled with concrete mortar. S7. Adjust the pressure in the target chamber to a second preset pressure value, where the second preset pressure value is greater than the first preset pressure value, so as to expel air bubbles from the concrete mortar. S8. Along the extension direction of the steel pipe (100), the sub-chamber (21) adjacent to the already poured sub-chamber (21) is set as the new target chamber, and the above steps S5 to S7 are repeated until the annular pouring cavity (2) is filled with concrete mortar. The flow guiding assembly (41) includes multiple flow guiding plates (42), which are sequentially spliced ​​along the axial direction of the steel pipe (100), and adjacent two flow guiding plates (42) are stacked with a second preset length. One side of the flow guiding plate (42) is connected to the outer wall of the steel pipe (100), and the other side extends upward at the preset angle in a direction away from the centroid of the steel pipe (100). The flow guiding port (421) is opened on the side of the flow guiding plate (42) away from the steel pipe (100). The ratio of the width of the flow guide (421) to the width of the flow guide plate (42) is greater than or equal to 0.1 and less than or equal to 0.

3.

2. The construction method for pouring concrete between the steel pipe and the tunnel lining segments in a shield tunnel according to claim 1, characterized in that, The inner wall of the segment (200) is provided with a plurality of pressure detection elements (5) along the circumferential direction. Each of the casting cavities (22) is provided with a pressure detection element (5) at a vertical height corresponding to the top of the top. The top of the segment (200) is provided with at least one pressure detection element (5). Step S6 specifically includes the following steps: S61. Continuously pour concrete mortar into the uppermost pouring cavity (22) of the target chamber, so that some of the concrete mortar continuously flows from top to bottom into the multiple pouring cavities (22) below the pouring cavity (22); S62. Determine whether all of the pressure detection elements (5) have detected pressure. If not, return to execute S61. If yes, execute S63. S63. Stop the pouring work on the target chamber, which is filled with concrete mortar.

3. The construction method for pouring concrete between the steel pipe and the tunnel lining segments in a shield tunnel according to claim 2, characterized in that, The pressure detection element (5) includes a pressure sensor.

4. The construction method for pouring concrete between the steel pipe and the tunnel lining segments in a shield tunnel according to claim 1, characterized in that, Step S80 is executed after step S7 and before step S8, and step S80 specifically includes the following steps: S80. Use cleaning equipment to clean the grouting pipes of the grouting equipment.

5. The construction method for pouring concrete between the steel pipe and the tunnel lining segments in a shield tunnel according to claim 1, characterized in that, Step S8 specifically includes the following steps: S81. Along the extension direction of the steel pipe (100), the sub-chamber (21) adjacent to the already poured sub-chamber (21) is set as a new target chamber, and a grouting port is opened on the top wall of the steel pipe (100) corresponding to the new target chamber. S82. Pass the grouting pipe of the grouting equipment through the grouting port and extend it into the casting cavity (22) at the top of the target chamber; S83. Repeat steps S5 to S7 above to fill the next compartment (21) along the extension direction of the steel pipe (100). S84. Repeat steps S81 to S83 until the annular casting cavity (2) is filled with concrete mortar.

6. The construction method for pouring concrete between the steel pipe and the tunnel lining segments in a shield tunnel according to claim 1, characterized in that, The separator (3) includes a rubber fiber composite diaphragm.

7. The construction method for pouring concrete between the steel pipe and the tunnel lining segments in a shield tunnel according to claim 1, characterized in that, The preset angle is greater than or equal to 15° and less than or equal to 45°.

8. The construction method for pouring concrete between the steel pipe and the tunnel lining segments in a shield tunnel according to claim 1, characterized in that, The first preset pressure value is -0.02MPa, and the second preset pressure value is 0.05MPa.

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