Steel reinforced concrete pipe joint of immersed tunnel

Abstract

The utility model discloses a steel reinforced concrete pipe joint of an immersed tunnel, and belongs to the technical field of lake and sea tunnel pipe gallery components. Comprising a pipe joint body, the pipe joint body comprises a pipe joint top wall, a pipe joint bottom wall, a pipe joint left side wall and a pipe joint right side wall, a safety channel is formed between the opposite sides of the pipe joint top wall and the pipe joint bottom wall in the width direction, and the pipe joint body is divided into a pipe joint left tunnel cavity and a pipe joint right tunnel cavity through the safety channel; the utility model is characterized in that the top wall of the pipe joint, the bottom wall of the pipe joint, the left side wall of the pipe joint, the right side wall of the pipe joint and the side wall of the safety channel are steel reinforced concrete wall bodies formed by arranging section steel in reinforced concrete, the reinforced concrete is composed of a reinforcing mesh and concrete, and the top wall of the pipe joint is provided with a left tunnel cavity exhaust pipe valve and a right tunnel cavity exhaust pipe valve; and water injection pipe valves are arranged in the length directions of the pipe joint left side wall and the pipe joint right side wall at intervals. The composite pipe has the advantages that the corrosion resistance is good, the service life is prolonged, the rigidity and the complex load resistance are excellent, and the pipe sinking efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe gallery components of lake and sea tunnels, and in particular relates to a steel concrete pipe section of an immersed tube tunnel. Background Art

[0002] The pipe segments of the immersed tube tunnel mentioned above are the core components for constructing lake and ocean tunnel corridors. The aforementioned lakes include Nanjing's Xuanwu Lake, Wuxi's Taihu Lake, Hefei's Fangxing Lake, Yinchuan's Yuehai Lake, etc.

[0003] Both lake tunnels and ocean tunnels have advantages that are not limited to the following: shortening the distance between cities and / or two regions, directly connecting two cities and avoiding detours in land transportation; improving traffic efficiency, through lake, sea tunnels or pipelines, transportation vehicles can be quickly transported directly to the destination, avoiding congestion and traffic accidents in land transportation; increasing traffic capacity, and can significantly increase the traffic capacity between cities through multiple tunnels to meet the growing traffic demand; promoting economic and cultural exchanges between cities, such as the construction of ocean tunnels can directly connect two cities, effectively promoting economic ties and trade between cities, and also facilitating cultural exchanges and tourism between cities; not being affected by climate, and can be used all day long. Compared with lake and sea bridges, it is not affected by bad weather such as wind, rain, snow, and fog, ensuring continuous and uninterrupted traffic; it does not cause damage to shipping and does not affect the landscape; it can avoid or reduce the occupation of land resources and significantly reduce demolition, etc.

[0004] In addition, taking my country's geographical conditions as an example, every year when the long holidays coincide, traveling to Hainan becomes a hot spot, but due to the inconvenience of entering and leaving the island, the Qiongzhou Strait ferry alone can no longer meet the demand for vehicles crossing the sea, especially when foggy days and the peak of vehicles entering and leaving the island during the Spring Festival overlap, it takes a day or more for vehicles to cross the sea by ferry. Therefore, if a tunnel is built, the above-mentioned unfavorable factors can be basically eliminated.

[0005] At present, there is no precedent for building (including preparing to build) tunnels in the deep sea: submarine immersed tube tunnels composed of immersed tube segments are generally built about 40 meters below the sea surface. The existing immersed tube segment structures are as follows: 1) The Hong Kong-Zhuhai-Macao Bridge is a reinforced concrete immersed tube segment. Its disadvantages are poor tube segment rigidity and short length, and it can only be used for submarine immersed tube tunnels; 2) The Shenzhen-Zhongshan Channel, which is the core transportation hub project of the Guangdong-Hong Kong-Macao Greater Bay Area, is a steel shell concrete immersed tube segment. Its disadvantages are poor corrosion resistance and easy corrosion of the steel shell. Although special treatment methods such as anti-corrosion treatment of the steel shell surface are adopted, it remains to be verified to achieve a service life of 100 years, and the maintenance cost is high. Therefore, it is necessary to redesign the immersed tube segment structure to meet the requirements of immersed tube segment structures for ocean (including submarine, sea) and lake immersed tube tunnels. Utility Model Content

[0006] The task of the utility model is to provide a steel-concrete pipe segment for an immersed tube tunnel, which has both the corrosion resistance of reinforced concrete and the good rigidity and strong ability to resist complex loads of a steel shell pipe segment. It is suitable for immersed tube tunnels in oceans and lakes in various complex environments, can be conveniently floated to the immersed tube site before laying, and is conducive to improving the efficiency of the immersed tube.

[0007] The task of the utility model is accomplished in this way. A steel-concrete pipe segment of an immersed tube tunnel comprises a pipe segment body, the pipe segment body comprising a pipe segment top wall, a pipe segment bottom wall corresponding to the bottom of the pipe segment top wall, a pipe segment left side wall located between the left side of the pipe segment top wall and the pipe segment bottom wall in the length direction and forming an integral structure with the pipe segment top wall and the pipe segment bottom wall, and a pipe segment right side wall located between the right side of the pipe segment top wall and the pipe segment bottom wall in the length direction and forming an integral structure with the pipe segment top wall and the pipe segment bottom wall. A safety passage is formed between the opposite sides of the pipe segment top wall and the pipe segment bottom wall in the width direction and along the length direction of the pipe segment top wall and the pipe segment bottom wall, and the pipe segment body is secured in the pipe segment body by the safety passage. The length direction is divided into a left tunnel cavity and a right tunnel cavity of the pipe segment, and the characteristics are that: the pipe segment top wall, pipe segment bottom wall, pipe segment left side wall, pipe segment right side wall and the safety passage side wall of the safety passage are steel-concrete wall bodies in which steel sections are arranged in reinforced concrete, and the reinforced concrete is composed of a steel mesh and concrete. On the pipe segment top wall and along the length direction of the pipe segment top wall, a left tunnel cavity exhaust pipe valve and a right tunnel cavity exhaust pipe valve are arranged respectively for connecting the pipe segment left tunnel cavity and the pipe segment right tunnel cavity with the outside world, and water injection pipe valves for injecting water into the pipe segment left tunnel cavity and the pipe segment right tunnel cavity are arranged at intervals in the length direction of the pipe segment left side wall and the pipe segment right side wall.

[0008] In a specific embodiment of the utility model, the top wall of the pipe segment, the bottom wall of the pipe segment, the left side wall of the pipe segment, the right side wall of the pipe segment and the side wall of the safety passage are each formed by splicing the steel sections, and the cross-sectional shape of the steel sections is rectangular, I-shaped or T-shaped; the steel mesh is combined on both sides of the top wall of the pipe segment, the bottom wall of the pipe segment, the left side wall of the pipe segment, the right side wall of the pipe segment and the side wall of the safety passage.

[0009] In another specific embodiment of the utility model, pipe segment top wall holes are opened at intervals on the pipe segment top wall, pipe segment bottom wall holes are opened at intervals on the pipe segment bottom wall, pipe segment left side wall holes are opened at intervals on the pipe segment left side wall, pipe segment right side wall holes are opened at intervals on the pipe segment right side wall, and safety passage side wall holes are opened at intervals on the safety passage side wall; the steel concrete wall body is formed into a whole by means of the pipe segment top wall holes, pipe segment bottom wall holes, pipe segment left side wall holes, pipe segment right side wall holes and safety passage side wall holes.

[0010] In another specific embodiment of the utility model, a steel mesh suspended from the side wall body and connected by connecting steel bars at positions corresponding to the pipe segment top wall holes, pipe segment bottom wall holes, pipe segment left wall holes, pipe segment right wall holes and safety passage side wall holes are respectively provided on the upper and lower sides of the pipe segment top wall, the upper and lower sides of the pipe segment bottom wall, the left and right sides of the pipe segment left wall, the left and right sides of the pipe segment right wall and the left and right sides of the safety passage side wall. Concrete is poured in combination with the steel mesh so that the upper and lower sides of the pipe segment top wall, the upper and lower sides of the pipe segment bottom wall, the left and right sides of the pipe segment left wall, the left and right sides of the pipe segment right wall and the left and right sides of the safety passage side wall each constitute the structure of the steel-concrete wall body.

[0011] In another specific embodiment of the present invention, when the pipe segment top wall, pipe segment bottom wall, pipe segment left side wall, pipe segment right side wall and safety passage side wall are steel sections with a rectangular cross-section, the rectangular cavity of the rectangle is filled with the concrete.

[0012] In another specific embodiment of the present utility model, the steel mesh is a hot-rolled ribbed steel mesh, and the connecting steel bars are hot-rolled ribbed steel bars.

[0013] In a more specific embodiment of the present invention, the crisscrossing parts of the hot-rolled ribbed steel mesh are fastened by iron wires, and the connecting parts of the connecting steel bars and the steel mesh are fastened by iron wires.

[0014] In a further specific embodiment of the present invention, tunnel cavity through holes communicating with the left tunnel cavity of the pipe segment and the right tunnel cavity of the pipe segment are provided at intervals in the length direction of the safety passage.

[0015] In yet another specific embodiment of the present invention, the diameters of the pipe segment top wall holes, pipe segment bottom wall holes, pipe segment left wall holes, pipe segment right wall holes and safety passage side wall holes are larger than the diameter of the connecting steel bars.

[0016] In yet another specific embodiment of the present invention, the diameters of the pipe segment top wall holes, pipe segment bottom wall holes, pipe segment left wall holes, pipe segment right wall holes and safety passage side wall holes are 5-20 times the diameter of the connecting steel bars.

[0017] The technical solution of the utility model has a steel-concrete wall body in which the top wall, bottom wall, left side wall, right side wall and side wall of the safety passage are steel sections arranged in reinforced concrete. Therefore, it has the good corrosion resistance of reinforced concrete to extend the service life within a reasonable period, and the steel shell pipe section has excellent rigidity to demonstrate a strong ability to resist complex loads. It can also be conveniently transported to the immersed tube site by floating before laying, which is beneficial to improving the efficiency of immersed tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a diagram of the first embodiment of the utility model;

[0019] Figure 2 for Figure 1 Detailed structural diagram of the pipe segment body shown;

[0020] Figure 3 This is a diagram of a second embodiment of the pipe segment body of the present utility model. DETAILED DESCRIPTION

[0021] In order to more clearly understand the technical essence and beneficial effects of the present invention, the applicant provides a detailed description in the form of embodiments below. However, the description of the embodiments is not a limitation on the present invention. Any equivalent changes made based on the concept of the present invention that are merely formal and not substantial should be regarded as within the scope of the technical solution of the present invention.

[0022] In the following description, all concepts related to up, down, left, right, front and back directions or orientations are based on Figure 1 The position state is taken as an example, and therefore it cannot be understood as a special limitation on the technical solution provided by the utility model. Example 1

[0023] See also Figure 1 and Figure 2 , shows a pipe segment body 1, which includes a pipe segment top wall 11, a pipe segment bottom wall 12 corresponding to the bottom of the pipe segment top wall 11, a pipe segment left side wall 13 located between the pipe segment top wall 11 and the pipe segment bottom wall 12 on the left side in the length direction and forming an integral structure with the pipe segment top wall 11 and the pipe segment bottom wall 12, and a pipe segment right side wall 14 located between the pipe segment top wall 11 and the pipe segment bottom wall 12 on the right side in the length direction and also forming an integral structure with the pipe segment top wall 11 and the pipe segment bottom wall 12, a safety passage 15 is formed between the opposite sides of the pipe segment top wall 11 and the pipe segment bottom wall 12 in the width direction and along the length direction of the pipe segment top wall 11 and the pipe segment bottom wall 12, and the pipe segment body 1 is divided into a pipe segment left tunnel cavity 16a and a pipe segment right tunnel cavity 16b in the length direction by the safety passage 15.

[0024] The technical highlights of the technical solution provided by the utility model are as follows: the aforementioned pipe segment top wall 11, pipe segment bottom wall 12, pipe segment left side wall 13, pipe segment right side wall 14 and safety passage side wall 151 of the safety passage 15 are steel-concrete wall bodies 3 in which steel sections are arranged in reinforced concrete. The aforementioned reinforced concrete is composed of a combination of steel mesh and concrete. A left tunnel cavity exhaust pipe valve 17a and a right tunnel cavity exhaust pipe valve 17b are arranged on the aforementioned pipe segment top wall 11 and along the length direction of the pipe segment top wall 11, respectively used to connect the aforementioned pipe segment left tunnel cavity 16a and the pipe segment right tunnel cavity 16b with the outside world. Water injection pipe valves 18 for injecting water into the pipe segment left tunnel cavity 16a and the pipe segment right tunnel cavity 16b are arranged at intervals in the length direction of the aforementioned pipe segment left side wall 13 and the pipe segment right side wall 14.

[0025] In this embodiment, the aforementioned pipe section top wall 11, pipe section bottom wall 12, pipe section left side wall 13, pipe section right side wall 14 and safety passage side wall 151 are each formed by splicing the aforementioned steel sections, and the cross-sectional shape of the aforementioned steel sections is rectangular, and the aforementioned steel mesh is combined with the two side surfaces of the pipe section top wall 11, pipe section bottom wall 12, pipe section left side wall 13, pipe section right side wall 14 and safety passage side wall 151. The aforementioned steel section splicing method is preferably welding, but it can also be spliced ​​with fasteners such as bolts.

[0026] According to professional common sense, the above-mentioned steel section with a rectangular cross-section shape can actually be called a rectangular composite steel pipe, and its length usually has different specifications such as 6m, 9m and 12m. The cross-sectional size and wall thickness of the rectangular composite steel pipe are usually determined (selected) according to design requirements. In addition, since the length of a pipe segment body 1 can reach hundreds of meters or even longer, in terms of width, since this embodiment is a two-way traffic lane, it is between 30 and 50m, and the height, that is, the height of the left and right tunnel cavities 16a and 16b of the pipe segment, is about 10m. Therefore, the aforementioned pipe segment body 1 is undoubtedly composed of rectangular composite steel pipes spliced ​​in the length direction and spliced ​​in the width and height directions. The splicing method is preferably welded as mentioned above. The height referred to here is actually the height of the left and right side walls 13 and 14 of the pipe segment, and the width is the width of the top and bottom walls 11 and 12 of the pipe segment. The length of the aforementioned rectangular combined steel pipe is not limited to 6m, 9m and 12m. For example, since the length of the pipe segment body 1 can reach 200m or even longer, the length of the aforementioned rectangular combined steel pipe can be customized to a longer size, such as 15m, 20m, etc.

[0027] Please see the key Figure 2, pipe joint top wall holes 111 are opened at intervals on the aforementioned pipe joint top wall 11, pipe joint bottom wall holes 121 are opened at intervals on the aforementioned pipe joint bottom wall 12, pipe joint left side wall holes 131 are opened at intervals on the aforementioned pipe joint left side wall 13, pipe joint right side wall holes 141 are opened at intervals on the aforementioned pipe joint right side wall 14, and safety passage side wall holes 1511 are opened at intervals on the aforementioned safety passage side wall 151; the aforementioned steel concrete wall body 3 is formed into a whole by means of the aforementioned pipe joint top wall holes 111, pipe joint bottom wall holes 121, pipe joint left side wall holes 131, pipe joint right side wall holes 141 and safety passage side wall holes 1511.

[0028] On the upper and lower sides of the pipe segment top wall 11, the upper and lower sides of the pipe segment bottom wall 12, the left and right sides of the pipe segment left wall 13, the left and right sides of the pipe segment right wall 14, and the left and right sides of the safety passage side wall 151, there are steel meshes 2 suspended from the side wall body (i.e., there is a space between the side wall body) and connected by connecting steel bars 21 at positions corresponding to the pipe segment top wall holes 111, pipe segment bottom wall holes 121, pipe segment left wall holes 131, pipe segment right wall holes 141, and safety passage side wall holes 1511, respectively. Concrete is poured at the position of the steel meshes 2 so that the upper and lower sides of the pipe segment top wall 11, the upper and lower sides of the pipe segment bottom wall 12, the left and right sides of the pipe segment left wall 13, the left and right sides of the pipe segment right wall 14, and the left and right sides of the safety passage side wall 151 each constitute the structure of the aforementioned steel concrete wall body 3. Since concrete is poured, the space between the aforementioned side wall bodies is filled with concrete. The specific thickness of the aforementioned steel concrete wall body 3 is determined according to design requirements. According to professional common sense, the aforementioned connecting steel bars 21 are used to connect the steel meshes 2 located on both sides of the steel section.

[0029] In the present embodiment, the pipe segment top wall 11, the pipe segment bottom wall 12, the pipe segment left side wall 13, the pipe segment right side wall 14 and the safety passage side wall 151 are made of steel sections with a rectangular cross-section shape, and the rectangular composite steel pipe cavity of the rectangular composite steel pipe is filled with the aforementioned concrete.

[0030] In this embodiment, the aforementioned steel mesh 2 is a hot-rolled ribbed steel mesh, and the aforementioned connecting steel bars 21 are hot-rolled ribbed steel bars.

[0031] Depend on Figure 1 As shown, the crisscrossing parts of the hot-rolled ribbed steel mesh are fastened (tied and fixed) by iron wires, and the connection parts of the connecting steel bars 21 and the steel mesh 2 are tied and fixed by iron wires. The connection method of the steel mesh 2 connected by the connecting steel bars 21 can also be connected by steel bar connectors, welding, or connection with connecting sleeves or combined connection, etc. The connection between the steel bars constituting the steel mesh 2 is the same. The connection between the steel bars and the steel section can also be preferably fixed by welding or other equivalent methods.

[0032] The applicant needs to explain that: since the aforementioned pipe segment top and bottom wall holes 111, 121, pipe segment left and right side wall holes 131, 141 and safety passage side wall holes 1511 play the important role of conducting concrete, the connecting steel bars 21 may not be provided in all of the pipe segment top and bottom wall holes 111, 121, pipe segment left and right side wall holes 131, 141 and safety passage side wall holes 1511 according to specific design and construction requirements.

[0033] Depend on Figure 1 As shown, tunnel cavity through holes 152 are provided at intervals in the length direction of the aforementioned safety passage 15, which are connected with the aforementioned left tunnel cavity 16a of the pipe segment and the right tunnel cavity 16b of the pipe segment.

[0034] Preferably, the diameters of the aforementioned pipe segment top wall hole 111 , pipe segment bottom wall hole 121 , pipe segment left wall hole 131 , pipe segment right wall hole 141 and safety passage side wall hole 1511 are larger than the diameter of the aforementioned connecting steel bar 21 .

[0035] The diameters of the aforementioned pipe segment top wall holes 111, pipe segment bottom wall holes 121, pipe segment left side wall holes 131, pipe segment right side wall holes 141 and safety passage side wall holes 1511 are preferably 5-20 times the diameter of the aforementioned connecting steel bars 21. For example, when the diameters of the connecting steel bars 21 are 16 mm, 18 mm and 22 mm respectively, then the diameters of the aforementioned pipe segment top and bottom wall holes 111, 121, pipe segment left and right side wall holes 131, 141 and safety passage side wall holes 1511 are 5 times, 12 times and 20 times the diameter of the aforementioned connecting steel bars 21 respectively.

[0036] Before use, the two ends of the pipe segment body 1 are usually sealed with steel plates, and floated to the target location of the pipe sinking by floating, and then the water injection pipe valve 18 is opened to introduce water into the left and right tunnel cavities 16a, 16b of the pipe segment. At the same time, the air in the left and right tunnel cavities 16a, 16b of the pipe segment is discharged from the left and right tunnel cavity exhaust pipe valves 17a, 17b. When the weight of the pipe segment body 1 after water injection is greater than the buoyancy of water, the pipe sinking is achieved with the help of a ship crane. In addition, since one end of each pipe segment body 1 is provided with a water stop, such as a GIAN+OMEGA water stop, the adjacent pipe segments after the sinking are connected, until the required number or length of tunnel sinking is completed, and then the aforementioned end sealing plate is removed and outfitting is carried out. Example 2

[0037] See also Figure 3 Only the steel section constituting the pipe segment body 1 is replaced with a welded I-beam with an I-shaped cross-section, and the rest is the same as the description of Example 1. Example 3

[0038] The figure is omitted, and only the cross-sectional shape of the steel section is changed to a T-shape, that is, T-shaped steel is used, and the rest is the same as the description of Example 1. Example 4

[0039] The figure is omitted, and only the steel section is changed into a truss shape, and the truss is welded by the steel section. The rest is the same as the description of Example 1.

[0040] In summary, the technical solution provided by the utility model makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects stated by the applicant in the technical effect column above.

Claims

1. A steel-concrete pipe segment of an immersed tube tunnel, comprising a pipe segment body (1), the pipe segment body (1) comprising a pipe segment top wall (11), a pipe segment bottom wall (12) corresponding to the bottom of the pipe segment top wall (11), a pipe segment left side wall (13) located between the pipe segment top wall (11) and the pipe segment bottom wall (12) on the left side in the length direction and forming an integral structure with the pipe segment top wall (11) and the pipe segment bottom wall (12), and a pipe segment left side wall (13) located between the pipe segment top wall (11) and the pipe segment bottom wall (12) on the right side in the length direction. A right side wall (14) of the pipe segment is disposed between the pipe segment top wall (11) and the pipe segment bottom wall (12) and is also formed as an integral structure with the pipe segment top wall (11) and the pipe segment bottom wall (12). A safety passage (15) is formed between the opposite sides of the pipe segment top wall (11) and the pipe segment bottom wall (12) in the width direction and along the length direction of the pipe segment top wall (11) and the pipe segment bottom wall (12). The pipe segment body (1) is divided into a left tunnel cavity (16a) and a right tunnel cavity (16b) of the pipe segment in the length direction by the safety passage (15). The invention is characterized in that: The pipe segment top wall (11), pipe segment bottom wall (12), pipe segment left side wall (13), pipe segment right side wall (14) and safety passage side wall (151) of the safety passage (15) are steel-concrete wall bodies (3) in which steel is arranged in reinforced concrete. The reinforced concrete is composed of a steel mesh and concrete. A left tunnel cavity exhaust pipe valve (17a) and a right tunnel cavity exhaust pipe valve (17b) are arranged on the pipe segment top wall (11) and along the length direction of the pipe segment top wall (11) respectively for connecting the pipe segment left tunnel cavity (16a) and the pipe segment right tunnel cavity (16b) with the outside. Water injection pipe valves (18) for injecting water into the pipe segment left tunnel cavity (16a) and the pipe segment right tunnel cavity (16b) are arranged at intervals in the length direction of the pipe segment left side wall (13) and the pipe segment right side wall (14).

2. The steel-concrete pipe segment of an immersed tube tunnel according to claim 1, characterized in that: The pipe segment top wall (11), the pipe segment bottom wall (12), the pipe segment left side wall (13), the pipe segment right side wall (14) and the safety passage side wall (151) are each formed by splicing the steel sections, and the cross-sectional shape of the steel sections is rectangular, I-shaped or T-shaped; the steel mesh is combined on both side surfaces of the pipe segment top wall (11), the pipe segment bottom wall (12), the pipe segment left side wall (13), the pipe segment right side wall (14) and the safety passage side wall (151).

3. The steel concrete pipe segment of an immersed tube tunnel according to claim 2, characterized in that: The pipe joint top wall holes (111) are provided at intervals on the pipe joint top wall (11), the pipe joint bottom wall holes (121) are provided at intervals on the pipe joint bottom wall (12), the pipe joint left side wall holes (131) are provided at intervals on the pipe joint left side wall (13), the pipe joint right side wall holes (141) are provided at intervals on the pipe joint right side wall (14), and the safety passage side wall holes (1511) are provided at intervals on the safety passage side wall (151); the steel concrete wall body (3) is formed into a whole by means of the pipe joint top wall holes (111), the pipe joint bottom wall holes (121), the pipe joint left side wall holes (131), the pipe joint right side wall holes (141) and the safety passage side wall holes (1511).

4. The steel concrete pipe segment of an immersed tube tunnel according to claim 3, characterized in that: A steel mesh (2) suspended from the side wall body and connected by connecting steel bars (21) at positions corresponding to the pipe segment top wall hole (111), the pipe segment bottom wall hole (121), the pipe segment left wall hole (131), the pipe segment right wall hole (141) and the safety passage side wall hole (151) is provided on the upper and lower sides of the pipe segment top wall (11), the upper and lower sides of the pipe segment bottom wall (12), the left and right sides of the pipe segment left wall (13), the left and right sides of the pipe segment right wall (14) and the left and right sides of the safety passage side wall (151), respectively. Concrete is poured in combination with the steel mesh (2) so that the upper and lower sides of the pipe segment top wall (11), the upper and lower sides of the pipe segment bottom wall (12), the left and right sides of the pipe segment left wall (13), the left and right sides of the pipe segment right wall (14) and the left and right sides of the safety passage side wall (151) each constitute the structure of the steel concrete wall body (3).

5. The steel-concrete pipe segment of an immersed tube tunnel according to claim 4, characterized in that: When the pipe segment top wall (11), pipe segment bottom wall (12), pipe segment left side wall (13), pipe segment right side wall (14) and safety passage side wall (151) are steel sections with a rectangular cross-section, the rectangular cavity is filled with the concrete.

6. The steel concrete pipe segment of an immersed tube tunnel according to claim 4, characterized in that: The steel mesh (2) is a hot-rolled ribbed steel mesh, and the connecting steel bars (21) are hot-rolled ribbed steel bars.

7. The steel-concrete pipe segment of an immersed tube tunnel according to claim 6, characterized in that: The hot-rolled ribbed steel mesh is fastened at the crisscrossed parts by iron wires, and the connection parts between the connecting steel bars (21) and the steel mesh (2) are fastened by iron wires.

8. The steel-concrete pipe segment of an immersed tube tunnel according to claim 1, characterized in that: Tunnel cavity through holes (152) that are in communication with the left tunnel cavity (16a) of the pipe section and the right tunnel cavity (16b) of the pipe section are provided at intervals in the length direction of the safety passage (15).

9. The steel concrete pipe segment of an immersed tube tunnel according to claim 4, characterized in that: The diameters of the pipe segment top wall hole (111), the pipe segment bottom wall hole (121), the pipe segment left side wall hole (131), the pipe segment right side wall hole (141) and the safety passage side wall hole (1511) are greater than the diameter of the connecting steel bar (21).

10. The steel concrete pipe segment of an immersed tube tunnel according to claim 9, characterized in that: The diameters of the pipe segment top wall hole (111), the pipe segment bottom wall hole (121), the pipe segment left wall hole (131), the pipe segment right wall hole (141) and the safety passage side wall hole (1511) are 5-20 times the diameter of the connecting steel bar (21).

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