Immersed tunnel pipe joint with improved structure

Abstract

The invention discloses an immersed tunnel pipe joint with an improved structure, and belongs to the technical field of underwater tunnels. Comprising a steel shell and a lining mechanism arranged on the inner wall of the steel shell, and the lining mechanism comprises a lining unit, a lining unit circumferential connecting piece and a lining unit axial connecting piece; the lining units are attached to each other in the circumferential direction of the steel shell inner wall of the steel shell one by one, are also attached to each other in the axial direction and extend from one end of the steel shell inner wall of the steel shell to the other end of the steel shell inner wall of the steel shell in the length direction. The lining unit circumferential connecting pieces connect every two adjacent lining units in the circumferential direction, and the lining unit axial connecting pieces connect every two adjacent lining units in the axial direction. The steel shell has the advantages that the excellent strength and rigidity of the steel shell are guaranteed, and the compression resistance and bending resistance are enhanced; the service life is prolonged, and long-term load and fatigue damage are resisted ideally; construction is convenient, and construction efficiency is improved; the device can adapt to complex geological conditions and is good in anti-seismic property; and economical efficiency is achieved, and expected water tightness is embodied.

Description

Technical Field

[0001] The invention belongs to the technical field of underwater tunnels, and in particular relates to an immersed tube tunnel segment with an improved structure. Background Art

[0002] The aforementioned deep-sea tunnel refers to a tunnel built on the seabed or underwater, which is mainly used to connect two sea areas or coastal areas, providing a more convenient and stable channel than a bridge. Specifically, it improves traffic efficiency. Through ocean tunnels or ocean pipelines, transportation vehicles can be quickly transported directly to the destination, avoiding congestion and traffic accidents in land transportation; increasing traffic capacity. Ocean tunnels can significantly increase the traffic capacity between cities through multiple tunnels to meet the growing traffic demand; promoting economic and cultural exchanges between cities. The construction of ocean tunnels can directly connect two cities, effectively promote economic ties and trade between cities, and also help cultural exchanges and tourism between cities; it is not affected by climate and can be used all day long. Compared with offshore bridges, ocean tunnels are not affected by bad weather such as wind, rain, snow, and fog, ensuring the continuity of traffic; it does not cause damage to shipping (sea transportation) and does not affect the landscape; it can avoid or occupy less land resources and significantly reduce demolition, etc.

[0003] In the prior art, the aforementioned immersed tube tunnel segments mainly adopt the following structural forms: reinforced concrete structure (such as the Hong Kong-Zhuhai-Macao Bridge undersea tunnel); steel shell concrete composite structure (such as the Shenzhen-Zhongshan Channel). The aforementioned two structures each have corresponding shortcomings. For example, as for the tunnel segments of the first type of reinforced concrete structure, they are heavy, take a long time to make and maintain, are difficult to float and install under high wave conditions, and are prone to instability; as for the tunnel segments of the second type of steel shell concrete composite structure, the steel shell welding and concrete pouring processes are complicated, the segment manufacturing period is long, the cost is high, and are difficult to float and install under high wave conditions, and are prone to instability. In view of the above-mentioned prior art, after many years of continuous attention and practical exploration by the applicant and repeated simulation and deduction tests, a technical solution has been formed that can largely make up for the deficiencies of the above-mentioned immersed tube segments. Summary of the invention

[0004] The task of the present invention is to provide a structurally improved immersed tube tunnel segment that helps to demonstrate excellent strength and rigidity, has a short production cycle, assembly operations, low cost, is easy to tow and install including floating, will not become unstable, has good safety, is suitable for submarine immersed tube tunnels and underwater tunnels, helps to meet design flexibility and helps to significantly reduce the impact on the production site environment.

[0005] The task of the present invention is accomplished in this way. A structurally improved immersed tube tunnel segment includes a steel shell and a lining mechanism arranged on the inner wall of the steel shell, characterized in that the lining mechanism includes a lining unit, a lining unit circumferential connector and a lining unit axial connector. The lining units are closely connected to each other in the circumferential direction of the inner wall of the steel shell of the steel shell and are also closely connected to each other in the axial direction and extend from one end to the other end in the length direction of the inner wall of the steel shell of the steel shell. The lining unit circumferential connector connects each two adjacent lining units in the circumferential direction, and the lining unit axial connector connects each two adjacent lining units in the axial direction.

[0006] In a specific embodiment of the present invention, the lining unit is in the shape of an arc, and the first circumferential end surface of each two adjacent lining units at one end in the circumferential direction is matched with each other through the fixed connection of the circumferential connecting piece of the lining unit, and the second circumferential end surface of each two adjacent lining units at the other end in the circumferential direction is also matched with each other through the fixed connection of the circumferential connecting piece of the lining unit, and the first axial side surface of each two adjacent lining units is matched with each other in a corresponding or mutually offset state through the fixed connection of the axial connecting piece of the lining unit, and the second axial side surface of each two adjacent lining units is also matched with each other in a corresponding or mutually offset state through the fixed connection of the axial connecting piece of the lining unit.

[0007] In another specific embodiment of the present invention, a first circumferential end face connector left clearance cavity and a first circumferential end face connector right clearance cavity are respectively provided at one end of the lining unit facing the first circumferential end face and located in the arc-shaped cavity of the lining unit, a first circumferential end face left connector hole is provided on the first circumferential end face and at a position corresponding to the first circumferential end face connector left clearance cavity, the first circumferential end face left connector hole is communicated with the first circumferential end face connector left clearance cavity, and a first circumferential end face connector left connector hole is provided at a position located on the right side of the first circumferential end face left connector hole. A right connector hole on the end face, the first circumferential end face right connector hole corresponds to and communicates with the first circumferential end face connector right yielding cavity; a second circumferential end face connector left yielding cavity and a second circumferential end face connector right yielding cavity are respectively provided in the arc-shaped cavity of the lining unit at one end of the lining unit facing the second circumferential end face and also located in the lining unit, a second circumferential end face left connector hole is provided on the second circumferential end face and at a position corresponding to the second circumferential end face connector left yielding cavity, the second circumferential end face left connector hole corresponds to and communicates with the second circumferential end face connector left yielding cavity A second circumferential end face right connecting piece hole is opened at a position on the right side of the second circumferential end face left connecting piece hole, and the second circumferential end face right connecting piece hole corresponds to and communicates with the second circumferential end face connecting piece right giving way cavity; an axial side connecting piece left giving way cavity is opened in the middle of one side of the liner unit facing the first axial side face and located in the arc-shaped cavity of the liner unit, and an axial side connecting piece right giving way cavity is opened in the middle of one side of the liner unit facing the second axial side face and also located in the arc-shaped cavity of the liner unit, and the left and right giving way cavities of the axial side connecting pieces are opposite to each other left and right. A first axial side connector hole communicating with the left give-way cavity of the axial side connector is provided on the first axial side and at a position corresponding to the left give-way cavity of the axial side connector, and a second axial side connector hole communicating with the right give-way cavity of the axial side connector is provided on the second axial side and at a position corresponding to the right give-way cavity of the axial side connector; wherein, when the axial first axial side and the second axial side of two adjacent liner units are in an offset state and fit against each other, the first axial side connector hole and the second axial side connector hole form a diagonal relationship with each other.

[0008] In another specific embodiment of the present invention, the liner unit circumferential connector is respectively inserted into the first circumferential end face left connector hole and the first circumferential end face right connector hole, and the liner unit circumferential connector is also inserted into the second circumferential end face left connector hole and the second circumferential end face right connector hole; the liner unit axial connector is respectively inserted into the first axial side connector hole and the second axial side connector hole; the ends of the liner unit circumferential connector respectively extend into the left and right makeshift cavities of the first circumferential end face connector, the left makeshift cavity of the second circumferential end face connector, and the right makeshift cavity of the second circumferential end face connector; the ends of the liner unit axial connector respectively extend into the left and right makeshift cavities of the axial side connector.

[0009] In another specific embodiment of the present invention, the channels from the left connecting member hole of the first circumferential end face to the left giving cavity of the first circumferential end face connecting member, from the right connecting member hole of the first circumferential end face to the right giving cavity of the first circumferential end face connecting member, from the left connecting member hole of the second circumferential end face to the left giving cavity of the second circumferential end face connecting member, from the right connecting member hole of the second circumferential end face to the right giving cavity of the second circumferential end face connecting member, from the first axial side connecting member hole to the left giving cavity of the axial side connecting member, and from the second axial side connecting member hole to the right giving cavity of the axial side connecting member are all arc-shaped; the circumferential connecting member of the liner unit and the axial connecting member of the liner unit are both bent into an arc shape that is adapted to the arc-shaped channels.

[0010] In another specific embodiment of the present invention, the insertion direction of the liner unit circumferential connecting piece on the left and right connecting piece holes on the first circumferential end surface is opposite to the insertion direction of the liner unit circumferential connecting piece on the left and right connecting piece holes on the second circumferential end surface; the insertion direction of the liner unit axial connecting piece on the first axial side connecting piece hole is opposite to the insertion direction on the second axial side connecting piece hole.

[0011] In a further specific embodiment of the present invention, the circumferential connecting member of the liner unit and the axial connecting member of the liner unit are bolts.

[0012] In a further specific embodiment of the present invention, a steel shell bracket is fixed in a spaced state on the outer wall of the steel shell and at the bottom of the length direction of the steel shell; a cathode is formed on the surface of the steel shell by an electrochemical method, and an EPDM rubber layer is compounded on the surface.

[0013] In yet another specific embodiment of the present invention, the steel shell is an alloy steel shell or a stainless steel shell.

[0014] In yet another specific embodiment of the present invention, the lining unit is made of reinforced concrete.

[0015] The technical effect of the technical solution provided by the present invention is as follows: since a steel shell is adopted and lining units are arranged on the inner wall of the steel shell, the lining units are mutually abutted and joined one by one in the circumferential direction of the inner wall of the steel shell and are mutually abutted and joined in the axial direction and extend from one end to the other end of the inner wall of the steel shell in the length direction, thereby ensuring the excellent strength and rigidity of the steel shell and enhancing the compression and bending resistance; since the steel shell itself has good durability for the service life, the service life can be extended and long-term load and fatigue damage can be ideally resisted; since the lining units can be prefabricated in the factory and quickly assembled on the construction site, and the hauling and installation including floating are convenient, there will be no instability and the safety is good, Therefore, it is not only very convenient for construction, but also beneficial to significantly improve the construction efficiency; since the steel shell and the lining unit arranged on the inner wall of the steel shell have strong anti-deformation ability, they can adapt to complex geological conditions and can exert good seismic resistance; since the lining unit, lining unit periphery and axial connectors of the structural system of the steel shell and the lining mechanism have low cost, good durability and tend to be maintenance-free during use, they are economical and can reflect the desired watertightness; since the steel shell and the lining unit can be adaptively selected and adjusted according to the needs of underwater tunnels or deep-sea immersed tube tunnel projects, it helps to meet the flexibility requirements of the design and since the steel shell can be recycled, it helps to significantly reduce the degree of impact on the production site environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the first embodiment of the present invention; Figure 2 for Figure 1 A detailed structural diagram of the lining unit shown; Figure 3 for Figure 1 Schematic diagram of the end face; Figure 4 is a structural diagram of a second embodiment of the present invention; Figure 5 for Figure 4 Detailed structural diagram of the lining unit shown. DETAILED DESCRIPTION

[0017] 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 of 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. Example 1

[0018] See also Figure 1 , showing a steel shell 1 and a lining mechanism 2 arranged on the inner wall of the steel shell 1, as the technical points of the technical solution provided by the present invention: the aforementioned lining mechanism 2 includes a lining unit 21, a lining unit circumferential connector 22 and a lining unit axial connector 23, the aforementioned lining units 21 are closely connected to each other in the circumferential direction of the steel shell inner wall of the aforementioned steel shell 1 and are also closely connected to each other in the axial direction and extend from one end to the other end in the length direction of the steel shell inner wall of the steel shell 1, the lining unit circumferential connector 22 connects each two adjacent lining units 21 in the circumferential direction, and the lining unit axial connector 23 connects each two adjacent lining units 21 in the axial direction.

[0019] See also Figure 2 And combined with Figure 1 The shape of the aforementioned lining unit 21 is an arc shape, and the first circumferential end face 211 of each two adjacent lining units 21 at one end in the circumferential direction is fixedly connected by the aforementioned lining unit circumferential connecting piece 22 and matched in a mutually abutting state, and the second circumferential end face 212 of each two adjacent lining units 21 at the other end in the circumferential direction is also fixedly connected by the aforementioned lining unit circumferential connecting piece 22 and matched in a mutually abutting state, and the axial direction (axial direction refers to the direction of rotation of each two adjacent lining units 21) is the same as the direction of rotation of each two adjacent lining units 21. Figure 1 The first axial side surface 213 of the position state shown in the direction from the left end to the right end in the length direction of the steel shell 1 is fitted against each other in a corresponding state through the fixed connection of the aforementioned liner unit axial connecting piece 23, and the second axial side surfaces 214 of each two adjacent liner units 21 are also fitted against each other in a corresponding state through the fixed connection of the aforementioned liner unit axial connecting piece 23.

[0020] See also Figure 2A first circumferential end face connector left yielding cavity 2151 (also referred to as "first circumferential end face connector upper left yielding cavity", the same below) and a first circumferential end face connector right yielding cavity 2152 (also referred to as "first circumferential end face connector upper right yielding cavity", the same below) are respectively provided in the lining unit arc-shaped cavity 215 located at one end of the lining unit 21 facing the first circumferential end face 211, and a first circumferential end face connector left yielding cavity 2151 is provided on the first circumferential end face 211 and at a position corresponding to the first circumferential end face connector left yielding cavity 2151, and the first circumferential end face connector left yielding cavity 2151 is communicated with the first circumferential end face connector left yielding cavity 2151, A first circumferential end face right connector hole 2112 is provided at a position on the right side of the first circumferential end face left connector hole 2111, and the first circumferential end face right connector hole 2112 corresponds to and communicates with the aforementioned first circumferential end face connector right yielding cavity 2152; a second circumferential end face connector left yielding cavity 2153 (also referred to as "second circumferential end face connector lower left yielding cavity", the same below) and a second circumferential end face connector right yielding cavity 2154 (also referred to as "second circumferential end face connector lower right yielding cavity", the same below) are respectively provided in the lining unit arc-shaped cavity 215 at one end of the aforementioned lining unit 21 facing the aforementioned second circumferential end face 212 and also located in the lining unit 21. 2 and a second circumferential end face left connector hole 2121 is provided at a position corresponding to the second circumferential end face connector left yielding cavity 2153, the second circumferential end face left connector hole 2121 is communicated with the second circumferential end face connector left yielding cavity 2153, a second circumferential end face right connector hole 2122 is provided at a position located on the right side of the second circumferential end face left connector hole 2121, the second circumferential end face right connector hole 2122 corresponds to and communicates with the second circumferential end face connector right yielding cavity 2154; an axial side connector left yielding cavity 2155 is provided in the middle of the side of the liner unit 21 facing the first axial side face 213 and located in the liner unit arc-shaped cavity 215, A right yielding cavity 2156 of an axial side connector is provided in the middle of the liner unit 21 facing the aforementioned second axial side surface 214 and is also located in the arc-shaped cavity 215 of the liner unit. The left and right yielding cavities 2155, 2156 of the axial side connector correspond to each other on the left and right. A first axial side connector hole 2131 communicating with the left yielding cavity 2155 of the axial side connector is provided on the aforementioned first axial side surface 213 and at a position corresponding to the left yielding cavity 2155 of the axial side connector. A second axial side connector hole 2141 communicating with the right yielding cavity 2156 of the axial side connector is provided on the aforementioned second axial side surface 214 and at a position corresponding to the right yielding cavity 2156 of the axial side connector.

[0021] See the key points Figure 2 The aforementioned liner unit circumferential connector 22 is respectively inserted into the aforementioned first circumferential end face left connector hole 2111 and the first circumferential end face right connector hole 2112, and the aforementioned liner unit circumferential connector 22 is also inserted into the aforementioned second circumferential end face left connector hole 2121 and the second circumferential end face right connector hole 2122; the aforementioned liner unit axial connector 23 is respectively inserted into the aforementioned first axial side connector hole 2131 and the second axial side connector hole 2141; the end portions of the aforementioned liner unit circumferential connector 22 respectively penetrate into the aforementioned left and right yielding cavities 2151, 2152 of the first circumferential end face connector, the left yielding cavity 2153 of the second circumferential end face connector, and the right yielding cavity 2154 of the second circumferential end face connector; the end portions of the aforementioned liner unit axial connector 23 respectively penetrate into the aforementioned left and right yielding cavities 2155, 2156 of the aforementioned axial side connector.

[0022] The passages from the aforementioned first circumferential end face left connecting piece hole 2111 to the aforementioned first circumferential end face connecting piece left giving way cavity 2151, from the aforementioned first circumferential end face right connecting piece hole 2112 to the aforementioned first circumferential end face connecting piece right giving way cavity 2152, from the aforementioned second circumferential end face left connecting piece hole 2121 to the aforementioned second circumferential end face connecting piece left giving way cavity 2153, from the aforementioned second circumferential end face right connecting piece hole 2122 to the aforementioned second circumferential end face connecting piece right giving way cavity 2154, from the aforementioned first axial side connecting piece hole 2131 to the aforementioned axial side connecting piece left giving way cavity 2155 and from the aforementioned second axial side connecting piece hole 2141 to the aforementioned axial side connecting piece right giving way cavity 2156 are all arc-shaped; the aforementioned liner unit circumferential connecting piece 22 and the aforementioned liner unit axial connecting piece 23 are both bent into arc shapes that are adapted to the arc-shaped passages.

[0023] Corresponds to Figure 4 The two ( Figure 2 Only one is shown in the figure) The liner unit circumferential connecting member 22 is connected from the adjacent liner unit 21 ( Figure 2 The upper lining unit 21) in the position state shown is equivalent to or called Figure 2 The schematic diagram shows that the liner unit 21 is inserted into the left and right connecting member holes 2121, 2122 of the second circumferential end face and respectively penetrates into the left and right making way cavities 2151, 2152 of the first circumferential end face connecting member through the left and right connecting member holes 2111, 2112 of the first circumferential end face, and then is locked with the liner unit circumferential connecting member locking member 221. Figure 2 The two ( Figure 2Only one is shown in the figure) The circumferential connecting piece 22 of the liner unit respectively passes through the left and right cavities 2153 and 2154 of the second circumferential end face connecting piece through the left and right connecting piece holes 2121 and 2122 of the second circumferential end face and then penetrates into the adjacent one. Figure 2 The lower one in the position shown (not shown in the figure, but can be seen in Figure 1 ) The corresponding first circumferential end face connectors on the lining unit 21 make way for the left and right cavities 2151, 2152 and are also locked by the aforementioned lining unit circumferential connector locking member 221. In this way, all lining units 21 are attached to each other one by one in a replicating manner around the circumferential direction of the steel shell inner wall of the steel shell 1 in a similar manner; Figure 2 The liner unit axial connector 23 shown in the first axial side connector hole 2131 corresponding to the first axial side 213 is connected from an adjacent one such as Figure 2 The left side of the liner unit 21 in the position shown in the figure is inserted into the second axial side connecting piece hole 2141 and then passes through the first axial side connecting piece hole 2131 and then enters the left axial side connecting piece cavity 2155 and is locked by the liner unit axial connecting piece locking piece 231. Figure 2 The liner unit axial connector 23 at the second axial side connector hole 2141 corresponding to the second axial side 214 is inserted from the right axial side connector cavity 2156 and passes through the second axial side connector hole 2141 and then passes through the adjacent Figure 2 The first axial side connecting member hole 2131 on the right side of the liner unit 21 in the position state is inserted into the axial side connecting member left clearance cavity 2155 and is also locked by the aforementioned liner unit axial connecting member locking member 231. In this way, all liner units 1 are connected in a state of being close to each other in the axial direction and extend from one end to the other end of the length direction of the steel shell inner wall of the steel shell 1 in a similar manner.

[0024] According to the description made by the applicant above and combined with Figure 2 The schematic diagram confirms that: the insertion direction of the aforementioned liner unit circumferential connector 22 on the aforementioned left and right connector holes 2111, 2112 of the first circumferential end surface is opposite to the insertion direction of the liner unit circumferential connector 22 on the aforementioned left and right connector holes 2121, 2122 of the second circumferential end surface; similarly, the insertion direction of the aforementioned liner unit axial connector 23 on the aforementioned first axial side connector hole 2131 is opposite to the insertion direction on the aforementioned second axial side connector hole 2141.

[0025] In the present embodiment, the aforementioned liner unit circumferential connector 22 and the aforementioned liner unit axial connector 23 are bolts respectively, and correspondingly, the aforementioned liner unit circumferential connector locking member 221 and the liner unit axial connector locking member 231 are locking nuts respectively.

[0026] See also Figure 3 And combined with Figure 1 A steel shell bracket 11 is welded and fixed at intervals on the outer wall of the steel shell 1 and at the bottom of the steel shell 1 in the longitudinal direction; a cathode is formed on the surface of the steel shell 1 by an electrochemical method, and an EPDM rubber layer that can play a good anti-corrosion role is compounded on the surface.

[0027] exist Figure 3 The figure shows the functional cavity 3 formed by connecting the lining units 21. In the use state, the functional cavity 3 is installed to form a tunnel cavity for vehicles to pass through.

[0028] The applicant needs to explain that: the cross-sectional shape of the aforementioned steel shell 1 and the functional cavity 3 is circular in this embodiment, but the aforementioned functional cavity 3 can also be elliptical (by reasonably changing the arc of the lining unit 21). In addition, the aforementioned tunnel cavity can be a plane type, i.e. a single-layer type, or a three-dimensional type, i.e. an interchange type, which is divided into upper and lower layers. In the case of upper and lower layers, the upper layer of the tunnel cavity is for cars to pass, and the lower layer of the tunnel cavity is for trains to pass, and the passage mode or passage space is bidirectional, such as bidirectional four-lane or six-lane.

[0029] In this embodiment, the steel shell 1 is an alloy steel shell, but it can also be a stainless steel shell; The lining unit 21 of the present invention is made of reinforced concrete. In addition, the steel shell 1 described in the present invention is substantially a steel pipe.

[0030] As a preferred solution, during construction, ie when the lining unit 21 is assembled, a waterstop is provided around the lining unit 21 , and the waterstop is a rubber waterstop or a PVC waterstop.

[0031] According to common sense, the steel shell 1 of the present invention can be composed of a plurality of pieces according to the length of the deep-sea tunnel, that is, the pipe segments of the immersed tube tunnel of the present invention can be connected to each other by a corresponding number of pipe segments. As an implementation method, the length of the steel shell 1 of this embodiment is 220m, the outer diameter of the steel shell 1 is 12.65m, the wall thickness of the steel shell 1 is 25mm, the thickness of the lining unit 21 is 0.8m, and the length and width of the lining unit 21 are determined according to actual design requirements. Example 2

[0032] See also Figure 4 and Figure 5In this embodiment, the first axial side surfaces 213 of each two adjacent liner units 21 are fixedly connected by the liner unit axial connecting piece 23 so as to be closely matched with each other in a mutually offset state, and the second axial side surfaces 214 of each two adjacent liner units 21 are also fixedly connected by the liner unit axial connecting piece 23 so as to be closely matched with each other in a mutually offset state (for details, see Figure 4 ).

[0033] Since the two adjacent liner units 21 of this embodiment are close-fitted in an offset state in the axial direction, that is, the first axial side surface 213 and the second axial side surface 214 of the two adjacent liner units 21 are close-fitted in an offset state, the left axial side connector cavity 2155 and the right axial side connector cavity 2156 are arranged diagonally (i.e., forming a diagonal relationship), the first axial side connector hole 2131 and the second axial side connector hole 2141 are also arranged diagonally (i.e., forming a diagonal relationship), and the liner unit axial connectors 23 accompanying the first axial side connector hole 2131 and the second axial side connector hole 2141 also form a diagonal relationship with each other. The rest is the same as the description of Example 1.

[0034] The preferred embodiments of the present invention have been specifically described above, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit and / or principles of the present invention, but these equivalent modifications or substitutions are all included in the scope disclosed by the present invention and defined by the corresponding claims.

[0035] In summary, the technical solution provided by the present invention 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 structurally improved immersed tunnel segment, comprising a steel shell (1) and a lining mechanism (2) arranged on the inner wall of the steel shell (1), characterized in that: The lining mechanism (2) comprises a lining unit (21), a lining unit circumferential connector (22) and a lining unit axial connector (23); the lining units (21) are connected to each other in a state of being adjacent to each other in the circumferential direction of the steel shell inner wall of the steel shell (1) and are also connected to each other in an axial state and extend from one end to the other end in the length direction of the steel shell inner wall of the steel shell (1); the lining unit circumferential connector (22) connects each two adjacent lining units (21) in the circumferential direction, and the lining unit axial connector (23) connects each two adjacent lining units (21) in the axial direction.

2. The structure-improved immersed tunnel segment according to claim 1 is characterized in that: The lining unit (21) is in the shape of an arc, and the first circumferential end surface (211) of each two adjacent lining units (21) at one end in the circumferential direction is matched with each other in a state of being pressed against each other by being fixedly connected by the circumferential connecting piece (22) of the lining unit, and the second circumferential end surface (212) of each two adjacent lining units (21) at the other end in the circumferential direction is also matched with each other in a state of being pressed against each other by being fixedly connected by the circumferential connecting piece (22) of the lining unit, and the first axial side surface (213) of each two adjacent lining units (21) is matched with each other in a state of being pressed against each other or being misaligned by being fixedly connected by the axial connecting piece (23) of the lining unit, and the second axial side surface (214) of each two adjacent lining units (21) is also matched with each other in a state of being pressed against each other or being misaligned by being fixedly connected by the axial connecting piece (23) of the lining unit.

3. The structure-improved immersed tunnel segment according to claim 2 is characterized in that: A first circumferential end face connecting piece left clearance cavity (2151) and a first circumferential end face connecting piece right clearance cavity (2152) are respectively provided at one end of the lining unit (21) facing the first circumferential end face (211) and located in the lining unit arc-shaped cavity (215) of the lining unit (21); a first circumferential end face connecting piece left clearance cavity (2151) is provided on the first circumferential end face (211) and at a position corresponding to the first circumferential end face connecting piece left clearance cavity (2151); the first circumferential end face left connecting piece hole (2111) is communicated with the first circumferential end face connecting piece left clearance cavity (2151); a first circumferential end face connecting piece left clearance cavity (2151) is provided at a position located on the right side of the first circumferential end face left connecting piece hole (2111); A first circumferential end face right connector hole (2112) is provided, and the first circumferential end face right connector hole (2112) corresponds to and communicates with the first circumferential end face connector right yielding cavity (2152); a second circumferential end face connector left yielding cavity (2153) and a second circumferential end face connector right yielding cavity (2154) are respectively provided at one end of the lining unit (21) facing the second circumferential end face (212) and in the lining unit arc-shaped cavity (215) also located in the lining unit (21); and a second circumferential end face left connector hole (2121) is provided on the second circumferential end face (212) and at a position corresponding to the second circumferential end face connector left yielding cavity (2153). The second circumferential end face left connecting piece hole (2121) is communicated with the second circumferential end face connecting piece left yielding cavity (2153), and a second circumferential end face right connecting piece hole (2122) is provided at a position located on the right side of the second circumferential end face left connecting piece hole (2121), and the second circumferential end face right connecting piece hole (2122) corresponds to and communicates with the second circumferential end face connecting piece right yielding cavity (2154); an axial side connecting piece left yielding cavity (2155) is provided in the middle of the side of the liner unit (21) facing the first axial side face (213) and located in the liner unit arc-shaped cavity (215), and a liner unit (21) is provided in the middle of the side of the liner unit (21) facing the second axial side face (214). Also, a right yielding cavity (2156) of an axial side connector is provided in the arc-shaped cavity (215) of the liner unit, and the left and right yielding cavities (2155, 2156) of the axial side connector correspond to each other on the left and right sides. A first axial side connector hole (2131) communicating with the left yielding cavity (2155) of the axial side connector is provided on the first axial side surface (213) and at a position corresponding to the left yielding cavity (2155) of the axial side connector. A second axial side connector hole (2141) communicating with the right yielding cavity (2156) of the axial side connector is provided on the second axial side surface (214) and at a position corresponding to the right yielding cavity (2156) of the axial side connector.Wherein, when the first axial side surfaces (213) and the second axial side surfaces (214) of two adjacent liner units (21) are in a misaligned state and close to each other, the first axial side surface connecting member hole (2131) and the second axial side surface connecting member hole (2141) form a diagonal relationship with each other. ; 4. The structure-improved immersed tunnel segment according to claim 3 is characterized in that: The liner unit circumferential connector (22) is inserted into the first circumferential end surface left connector hole (2111) and the first circumferential end surface right connector hole (2112), and the liner unit circumferential connector (22) is also inserted into the second circumferential end surface left connector hole (2121) and the second circumferential end surface right connector hole (2122); the first axial side connector hole (2131) and the second axial side connector hole (2141) are each The liner unit axial connector (23) is inserted; the ends of the liner unit circumferential connector (22) respectively extend into the left and right clearance cavities (2151, 2152) of the first circumferential end face connector, the left clearance cavity (2153) of the second circumferential end face connector, and the right clearance cavity (2154) of the second circumferential end face connector; the ends of the liner unit axial connector (23) respectively extend into the left and right clearance cavities (2155, 2156) of the axial side connector.

5. The structure-improved immersed tunnel segment according to claim 4 is characterized in that: The channels from the left connecting piece hole (2111) of the first circumferential end face to the left giving way cavity (2151) of the first circumferential end face connecting piece, from the right connecting piece hole (2112) of the first circumferential end face to the right giving way cavity (2152) of the first circumferential end face connecting piece, from the left connecting piece hole (2121) of the second circumferential end face to the left giving way cavity (2153) of the second circumferential end face connecting piece, from the right connecting piece hole (2122) of the second circumferential end face to the right giving way cavity (2154) of the second circumferential end face connecting piece, from the first axial side connecting piece hole (2131) to the left giving way cavity (2155) of the axial side connecting piece, and from the second axial side connecting piece hole (2141) to the right giving way cavity (2156) of the axial side connecting piece are all arc-shaped; the liner unit circumferential connecting piece (22) and the liner unit axial connecting piece (23) are both bent into arc shapes that are adapted to the arc-shaped channels.

6. The structure-improved immersed tunnel segment according to claim 5 is characterized in that: The insertion direction of the liner unit circumferential connector (22) on the left and right connector holes (2111, 2112) on the first circumferential end surface is opposite to the insertion direction of the liner unit circumferential connector (22) on the left and right connector holes (2121, 2122) on the second circumferential end surface; the insertion direction of the liner unit axial connector (23) on the first axial side connector hole (2131) is opposite to the insertion direction on the second axial side connector hole (2141).

7. The structure-improved immersed tunnel segment according to any one of claims 1 to 6, characterized in that: The liner unit circumferential connecting piece (22) and the liner unit axial connecting piece (23) are each a bolt.

8. The structure-improved immersed tunnel segment according to claim 1, characterized in that: A steel shell bracket (11) is fixed in a spaced state on the outer wall of the steel shell (1) and at the bottom of the steel shell (1) in the longitudinal direction; a cathode is formed on the surface of the steel shell (1) by an electrochemical method, and an EPDM rubber layer is compounded on the surface.

9. The structure-improved immersed tunnel segment according to claim 1 or 8, characterized in that: The steel shell (1) is an alloy steel shell or a stainless steel shell.

10. The structure-improved immersed tunnel segment according to any one of claims 1 to 6, characterized in that: The lining unit (21) is made of reinforced concrete.

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