Truss type floating tunnel anchoring device, anchoring system and anchoring installation method thereof

Abstract

The present invention discloses a truss-type suspended tunnel anchoring device, an anchoring system and an anchoring installation method thereof. The device is used for fixing at least two suspended tunnel pipe bodies so that the tunnel pipe bodies are in a stable state in water under the action of buoyancy and anchoring force. The device comprises: a plurality of support mechanisms, at least two arc-shaped pipe fixing trusses, at least one connecting truss, at least four anchoring foundations and at least four anchor cable connecting devices thereof; the system comprises at least one of the above-mentioned truss-type suspended tunnel anchoring devices; the method is applied in the above-mentioned anchoring system to meet the requirements of connecting the anchoring system with the tunnel pipe body and connecting multiple parallel tunnels, so that the tunnels can be safely and stably suspended in the ocean or river.

Description

Technical Field

[0001] The invention relates to the technical field of suspended tunnels and marine engineering, and in particular to a truss type suspended tunnel anchoring device, an anchoring system and an anchoring installation method thereof. Background Art

[0002] The underwater suspended tunnel, also known as the Archimedean bridge, is a new type of future transportation structure with buoyancy greater than gravity and suspended and fixed in the water at an appropriate depth by an anchoring system. Compared with traditional large-span bridges and submarine tunnels, the suspended tunnel has the characteristics of flexible site selection, low cost, little damage to the environment, and little impact from bad weather, and has significant advantages in crossing deep-water fjords.

[0003] In the existing scheme, the anchoring system of the suspended tunnel is mainly composed of anchor cables and anchor foundations. For double-line and multi-line parallel tube tunnel structures, the aforementioned research and design schemes use anchor cables directly connected to the tunnel body, and then the tunnels are rigidly connected. However, there are strong hydrodynamic loads in oceans and rivers. The dynamic load and buoyancy will cause significant stress concentration at the connection between the tunnel and the anchor cable. Especially when concrete is used as the tube material, although it has good economy and bearing performance, it has weak tensile and shear properties, which causes stress concentration at the connection between the anchor cable and the tube body and the connection between the multi-line tube body, which can easily lead to anchor failure and affect the overall safety of the structure. Therefore, it is extremely important to invent a reasonable and reliable truss-type suspended tunnel anchoring device, anchoring system and anchoring installation method for the safe application of suspended tunnels, a future transportation infrastructure. Summary of the invention

[0004] The purpose of this patent is to solve the safety problem of the connection between the suspended tunnel and the anchoring system, to avoid anchor failure caused by stress concentration at the connection between the suspended tunnel and the anchor cable, and local connection failure caused by stress concentration between the connection tubes of multiple tunnels. The present invention proposes a truss-type suspended tunnel anchoring device, an anchoring system and an anchoring installation method to meet the needs of connecting the anchoring system with the tunnel tube and connecting multiple parallel tunnels, so that the tunnel can be safely and stably suspended in the ocean or river.

[0005] To achieve the above object, one of the technical solutions adopted by the present invention is: a truss-type floating tunnel anchoring device, which is used to fix at least two suspended tunnel pipes 1, so that the tunnel pipe 1 is in a stable state in the water under the action of buoyancy and anchoring force, and the device includes:

[0006] A plurality of support mechanisms 2, used to provide a base for the device to be installed on the tunnel tube 1;

[0007] At least two arc-shaped tube body fixing trusses 3, used for fixing the tunnel tube body 1;

[0008] At least one connecting truss 4, used to connect the corresponding two arc-shaped tube fixed trusses 3;

[0009] At least four anchoring foundations 5, used for anchoring the suspended tunnel pipe body 1 and providing tension anchoring force for the device; each of the anchoring foundations 5 is vertically fixedly installed in the seabed or riverbed stratum;

[0010] At least four anchor cable connection devices 6 are used to connect the four corners of the bottom end of the arc-shaped tube fixed truss 3 with the corresponding anchor foundation 5, and realize the load transfer between the arc-shaped tube fixed truss 3 and the anchor foundation 5 through the anchor cable connection devices 6;

[0011] The contact points between the arc-shaped tube fixed truss 3 and the tunnel tube 1 are connected by the support mechanism 2, so as to realize the circumferential shear dislocation and radial compression between the arc-shaped tube fixed truss 3 and the tunnel tube 1;

[0012] The two adjacent ends of the two arc-shaped tube fixed trusses 3 are fixedly connected to the two ends of a connecting truss 4 .

[0013] Furthermore, the support mechanism 2 comprises:

[0014] An enlarged base 201, wherein the enlarged base 201 is connected to the tunnel body 1 via fasteners;

[0015] At least one layer of alloy steel plate 202;

[0016] At least one layer of rubber 203, used for vibration reduction and buffering of the arc-shaped tube fixing truss 3;

[0017] A connecting plate 204, wherein the connecting plate 204 is connected to the enlarged base 201 via a fastener;

[0018] At least two angle plates 205, each of which is installed on the connecting plate 204 in an inwardly inclined manner;

[0019] The alloy steel plate 202 and the rubber 203 are located on the enlarged base 201 and are arranged alternately.

[0020] Furthermore, the arc-shaped tube fixing truss 3 comprises:

[0021] At least two upper chord arch ribs 301, each of the upper chord arch ribs 301 is arranged in parallel;

[0022] At least two lower chord arch ribs 302 , each of the lower chord arch ribs 302 is arranged in parallel; the lower chord arch rib 302 and the upper chord arch rib 301 are arranged concentrically.

[0023] A plurality of fixed truss transverse connecting rods 303, used to connect two upper chord arch ribs 301 or two lower chord arch ribs 302;

[0024] A plurality of fixed truss web members 304, used to connect the upper chord arch rib 301 and the lower chord arch rib 302 on the same side;

[0025] A plurality of anchor cable connection points 305 are used to install the anchor cable connection device 6 , and each of the anchor cable connection points 305 is located at the bottom of the arc-shaped tube fixed truss 3 .

[0026] Furthermore, the connecting truss 4 comprises:

[0027] A plurality of main chord rods 401, each main chord rod 401 is arranged parallel to each other to form a rectangular parallelepiped;

[0028] A plurality of connecting truss web members 402, each of the connecting truss web members 402 being obliquely installed between two vertically parallel main chord members 401;

[0029] A plurality of connecting truss transverse connecting rods 403, each of the connecting truss transverse connecting rods 403 is installed between two transversely parallel main chord rods 401;

[0030] The fulcrum of the main chord 401 is arranged at the node of the upper chord arch rib 301 for effectively transmitting the truss load.

[0031] Furthermore, the length of the connecting truss 4 is 1.5D-2.0D of the clear distance between the two tunnel tubes 1 , where D is the outer diameter of the tunnel tube 1 , and is used to reduce the flow-blocking load transmitted between the two tunnel tubes 1 .

[0032] Furthermore, the anchor cable connecting device 6 comprises:

[0033] Anchor cable 601, wherein the anchor cable 601 is a steel wire rope with a protective layer;

[0034] A truss connector 602, wherein the truss connector 602 is installed on the anchor cable connection point 305;

[0035] An anchor foundation connector 603, the anchor foundation connector 603 is installed on the top or side surface of the anchor foundation 5;

[0036] at least two H-shaped connectors 604;

[0037] at least two anchor cable connectors 605;

[0038] The truss connector 602, one of the H-shaped connectors 604, one of the anchor cable connectors 605, the anchor cable 601, another anchor cable connector 605 and the anchoring foundation connector 603 are connected in sequence.

[0039] Furthermore, the interior of the tunnel tube body 1 is a reinforced concrete tube body 101, and the exterior is an aluminum alloy tube body 102; the reinforced concrete tube body 101 and the aluminum alloy tube body 102 are nested as a whole.

[0040] One of the technical solutions adopted by the present invention is: an anchoring system, which includes at least one of the above-mentioned truss-type floating tunnel anchoring devices.

[0041] Further, when the length of a single section of the tunnel tube 1 is N times the span of the truss type suspended tunnel anchoring device, 2, and is an integer, the truss-type floating tunnel anchoring devices are arranged at the longitudinal joints of the tunnel body 1 and are distributed at equal intervals.

[0042] One of the technical solutions adopted by the present invention is: an anchoring installation method, which is applied to the above-mentioned anchoring system, and the method is:

[0043] S1, the anchoring foundation 5 is anchored in the seabed or riverbed stratum to provide anchoring force for the anchoring system;

[0044] S2, prepare four sections of tunnel tubes 1 that are parallel to each other;

[0045] S3, installing the truss type floating tunnel anchoring device at the longitudinal joint of the tunnel body 1 and connecting it to the anchoring foundation 5;

[0046] S4. When the tunnel body 1 needs to be extended, S1-S3 are repeated until the required tunnel length is reached.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] In the truss-type floating tunnel anchoring device of the present invention, the anchor cable connecting device is not directly connected to the tunnel body, but is connected to the tunnel body through the arc-shaped tube fixed truss and the connecting truss, that is, the arc-shaped tube fixed truss is connected to the tunnel body 1 through the support mechanism. When there are multiple tunnel bodies 1, the arc-shaped tube fixed trusses are connected through the connecting truss. Then, the load transfer between the arc-shaped tube fixed truss and the anchor foundation is realized through the anchor cable connecting device. The anchor foundation goes deep into the seabed stratum to provide tension anchoring force for the anchoring system.

[0049] To meet the needs of connecting the anchoring system with the tunnel body and between multiple parallel tunnels, the tunnel can be safely and stably suspended in the ocean or river. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a structural schematic diagram of the truss type floating tunnel anchoring device of the present invention;

[0051] Figure 2 A top view of the parallel suspension tunnel tubes of the present invention;

[0052] Figure 3It is a structural schematic diagram of the arc-shaped tube body fixing truss and the connecting truss of the present invention;

[0053] Figure 4 Schematic diagram of the tunnel tube spacing of the present invention.

[0054] Figure 5 It is a structural schematic diagram of the vertical connection of the arc-shaped tube body fixed truss, the anchor cable connecting device and the anchor foundation of the present invention;

[0055] Figure 6 It is a schematic structural diagram of the lateral connection of the arc-shaped tube body fixed truss, the anchor cable connecting device and the anchor foundation of the present invention;

[0056] Figure 7 It is a structural schematic diagram of a truss connector of the present invention;

[0057] Figure 8 It is a schematic structural diagram of the H-shaped connector of the present invention.

[0058] Fig. 9 It is a structural schematic diagram of the anchor cable connector of the present invention;

[0059] Fig.10 It is a schematic diagram of the vertical structure of the anchor foundation connector of the present invention;

[0060] Fig.11 It is a schematic diagram of the lateral structure of the anchor foundation connector of the present invention;

[0061] Fig.12 It is a structural schematic diagram of the support mechanism of the present invention.

[0062] Fig.13 It is a structural schematic diagram of the connection between the support mechanism of the present invention, the arc-shaped tube fixed truss, and the suspended tunnel tube;

[0063] Fig.14 It is a schematic diagram of the structure of the anchoring system of the present invention arranged at the longitudinal joint of the tunnel pipe body;

[0064] Fig.15 It is a structural schematic diagram of the overall application of the anchoring system of the present invention;

[0065] In the figure: 1, tunnel body; 101, reinforced concrete body; 102, aluminum alloy body; 2, support mechanism; 201, enlarged base; 202, alloy steel plate; 203, rubber; 204, connecting plate; 205, angle plate;

[0066] 3. Curved tube fixed truss; 301. Upper chord arch rib; 302. Lower chord arch rib; 303. Fixed truss transverse connecting rod; 304. Fixed truss web rod; 305. Anchor cable connection point;

[0067] 4. Connecting trusses; 401. Main chord; 402. Connecting truss web members; 403. Connecting truss transverse connecting rods;

[0068] 5. Anchor foundation; 6. Anchor cable connecting device; 601. Anchor cable; 602. Truss connecting piece; 6021. Truss connecting plate; 6022. Truss connecting piece U-shaped ring; 603. Anchor foundation connecting piece; 6031. Anchor foundation connecting plate; 6032. Anchor foundation connecting piece U-shaped ring; 604. H-shaped connector; 6041. H-shaped connector body; 6042. Bolt; 605. Anchor cable connector; 6051. Anchor cable locking device; 6052. Anchor cable connector U-shaped ring. DETAILED DESCRIPTION

[0069] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0070] Example 1

[0071] like Figure 1 As shown, the truss type suspended tunnel anchoring device is used to fix at least two suspended tunnel pipes 1, so that the tunnel pipe 1 is in a stable state in the water under the action of buoyancy and anchoring force, as shown in FIG. Figure 2 As shown, specifically, the interior of the tunnel tube body 1 is a reinforced concrete tube body 101, and the exterior is an aluminum alloy tube body 102; the reinforced concrete tube body 101 and the aluminum alloy tube body 102 are nested as a whole.

[0072] The device includes:

[0073] like Figure 12-13 As shown, a plurality of support mechanisms 2 are used to provide a base for the device to be installed on the tunnel tube 1;

[0074] Specifically, the support mechanism 2 includes:

[0075] An enlarged base 201, wherein the enlarged base 201 is connected to the tunnel body 1 via fasteners;

[0076] Specifically, the enlarged base 201 is connected to the tunnel body 1 by bolts.

[0077] At least one layer of alloy steel plate 202;

[0078] At least one layer of rubber 203, used for vibration reduction and buffering of the arc-shaped tube fixing truss 3;

[0079] A connecting plate 204, wherein the connecting plate 204 is connected to the enlarged base 201 via a fastener;

[0080] At least two angle plates 205, each of which is installed on the connecting plate 204 in an inwardly inclined manner;

[0081] The alloy steel plate 202 and the rubber 203 are located on the enlarged base 201 and are arranged alternately.

[0082] The use of the support mechanism 2 to connect the arc-shaped pipe body fixing truss 3 and the tunnel pipe body 1 can achieve circumferential shear dislocation and radial compression between the two, avoid stress concentration, and reduce the vibration of the anchoring system under the action of hydrodynamic loads.

[0083] At the same time, in order to resist the effects of marine corrosion environments such as chloride ion corrosion and biological corrosion, the alloy steel plate 202 and the angle plate 205 are made of highly corrosion-resistant alloy materials, and can be protected by local sacrificial anodes, or by impressed current cathode protection measures integrated with the arc-shaped tube fixed truss 3 and the connecting truss 4. At the same time, the support rubber is made of a rubber material with good elasticity, good shear deformation capacity, corrosion resistance, and aging resistance.

[0084] like Figure 3 As shown, further, at least two arc-shaped tube body fixing trusses 3 are used to fix the tunnel tube body 1;

[0085] Specifically, the arc-shaped tube fixing truss 3 includes:

[0086] At least two upper chord arch ribs 301, each of the upper chord arch ribs 301 is arranged in parallel;

[0087] At least two lower chord arch ribs 302 , each of the lower chord arch ribs 302 is arranged in parallel; the lower chord arch rib 302 and the upper chord arch rib 301 are arranged concentrically.

[0088] A plurality of fixed truss transverse connecting rods 303, used to connect two upper chord arch ribs 301 or two lower chord arch ribs 302;

[0089] A plurality of fixed truss web members 304, used to connect the upper chord arch rib 301 and the lower chord arch rib 302 on the same side;

[0090] A plurality of anchor cable connection points 305 are used to install the anchor cable connection device 6, and each of the anchor cable connection points 305 is located at the bottom of the arc-shaped tube fixed truss 3. If necessary, local reinforcement and connecting rods need to be provided.

[0091] Specifically, the lower chord arch rib 302 is supported on the connecting plate 204 on the upper part of the support mechanism 2, and the two sides of the upper and lower chord arch rib 302 are welded to the angle plate 205, so as to achieve a firm connection between the support mechanism 2 and the arc-shaped tube fixed truss 3.

[0092] Further, at least one connecting truss 4 is used to connect the corresponding two arc-shaped tube fixed trusses 3;

[0093] Specifically, the connecting truss 4 includes:

[0094] A plurality of main chord rods 401, each main chord rod 401 is arranged parallel to each other to form a rectangular parallelepiped;

[0095] A plurality of connecting truss web members 402, each of the connecting truss web members 402 being obliquely installed between two vertically parallel main chord members 401;

[0096] A plurality of connecting truss transverse connecting rods 403, each of the connecting truss transverse connecting rods 403 is installed between two transversely parallel main chord rods 401;

[0097] The fulcrum of the main chord 401 is arranged at the node of the upper chord arch rib 301 for effectively transmitting the truss load.

[0098] Specifically, the arc-shaped tube fixed truss 3 directly bears the net buoyancy load of the tunnel tube 1, the hydrodynamic load transmitted by the tunnel tube 1, the tension load of the anchor cable 601, and the load between the tunnel tubes 1 transmitted by the connecting truss 4. The connecting truss 4 transmits the horizontal tension component of the anchor system and the horizontal load component caused by the hydrodynamic load, as well as the bending moment and shear force components caused by the anchor tension and hydrodynamic force. At the same time, the arc-shaped tube fixed truss 3 and the connecting truss 4 should be able to bear the shear force and bending moment components caused by the inertia force of the asynchronous movement of the tube.

[0099] The arc-shaped tube fixed truss 3 and the connecting truss 4 are arranged symmetrically along the center line. The arc-shaped tube fixed truss 3 and the connecting truss 4 are made of highly corrosion-resistant alloy steel, such as titanium alloy; at the same time, the arc-shaped tube fixed truss 3 and the connecting truss 4 are protected by sacrificial anodes or impressed current cathodes as a whole, thereby avoiding failure of the anchoring system caused by structural corrosion.

[0100] like Figure 4 As shown, further, the length of the connecting truss 4 is 1.5D-2.0D of the clear distance between the two tunnel bodies 1, where D is the outer diameter of the tunnel body 1, and is used to reduce the shielding flow load transmitted between the two tunnel bodies 1.

[0101] like Figure 5-11 As shown, further, at least four anchoring foundations 5 are used to anchor the suspended tunnel pipe body 1 and provide tension anchoring force for the device; each of the anchoring foundations 5 is vertically fixedly installed in the seabed or riverbed stratum;

[0102] Furthermore, at least four anchor cable connection devices 6 are used to connect the four corners of the bottom end of the arc-shaped tube fixed truss 3 with the corresponding anchor foundation 5, and the load transfer between the arc-shaped tube fixed truss 3 and the anchor foundation 5 is realized through the anchor cable connection devices 6;

[0103] Specifically, the anchor cable connecting device 6 includes:

[0104] Anchor cable 601, wherein the anchor cable 601 is a steel wire rope with a protective layer;

[0105] A truss connector 602, wherein the truss connector 602 is installed on the anchor cable connection point 305;

[0106] Specifically, the truss connector 602 is composed of a truss connector plate 6021 and a truss connector U-shaped ring 6022. Alternatively, the truss connector 602 may be composed of a connector plate and an ear plate in the prior art.

[0107] The anchor foundation connector 603 is installed on the top or side surface of the anchor foundation 5 ; the anchor foundation connector 603 is composed of an anchor foundation connecting plate 6031 and an anchor foundation connector U-shaped ring 6032 .

[0108] at least two H-shaped connectors 604;

[0109] Specifically, the H-shaped connector 604 is composed of an H-shaped connector body 6041 and two bolts 6042 .

[0110] at least two anchor cable connectors 605;

[0111] Specifically, the anchor cable connector 605 is composed of an anchor cable locking device 6051 and an anchor cable connector U-shaped ring 6052 .

[0112] Specifically, one end of the H-shaped connector 604 is buckled with the truss connector U-shaped ring 6022 through bolts, and the other end is buckled with the anchor cable connector U-shaped ring 6052 through bolts. The anchor cable connector 605 is connected to the anchor cable 601 through the anchor cable locking device 6051.

[0113] The truss connector 602, one of the H-shaped connectors 604, one of the anchor cable connectors 605, the anchor cable 601, another anchor cable connector 605 and the anchoring foundation connector 603 are connected in sequence.

[0114] Specifically, when using suction anchors and pile anchors and other anchor foundation 5 structural types, the anchor foundation connector that bears the vertical anchoring force is located at the top center of the anchor foundation 5, so that the center line of the anchor cable 601 coincides with the center line of the anchor foundation 5, maintaining vertical bearing stability and avoiding the lever effect caused by the deflection of the top anchor tension, that is, avoiding reducing the bearing capacity of the anchor foundation 5.

[0115] For anchor foundation 5 forms such as pile anchors and suction anchors, the position of the anchor foundation connector 603 set on the side should be at the optimal mooring point in the middle and lower part to fully utilize the bearing capacity of the anchor foundation 5. The position of the optimal mooring point can be determined based on empirical methods, theoretical calculation methods or ultra-gravity centrifugal model tests. For anchor foundation 5 forms such as pile anchors and suction anchors, the inclined anchor cable 601 is partially in the seabed or riverbed strata, and the wear resistance of the anchor cable 601 should meet the requirements of friction with the strata during long-term operation of the tunnel without causing wear and damage that affects the performance; when this requirement cannot be met, an anchor chain with better wear resistance should be used to replace the anchor cable 601 in the seabed or riverbed strata.

[0116] The contact points between the arc-shaped tube fixed truss 3 and the tunnel tube 1 are connected by the support mechanism 2, so as to realize the circumferential shear dislocation and radial compression between the arc-shaped tube fixed truss 3 and the tunnel tube 1;

[0117] The two adjacent ends of the two arc-shaped tube fixed trusses 3 are fixedly connected to the two ends of a connecting truss 4 .

[0118] Furthermore, the interior of the tunnel tube body 1 is a reinforced concrete tube body 101, and the exterior is an aluminum alloy tube body 102; the reinforced concrete tube body 101 and the aluminum alloy tube body 102 are nested as a whole.

[0119] Example 2

[0120] like Figure 14-15 As shown, an anchoring system includes at least one truss-type floating tunnel anchoring device described in the above-mentioned embodiment 1.

[0121] Further, when the length of a single section of the tunnel tube 1 is N times the span of the truss type suspended tunnel anchoring device, 2, and is an integer, the truss-type floating tunnel anchoring devices are arranged at the longitudinal joints of the tunnel body 1 and are distributed at equal intervals.

[0122] Specifically, the length of a single section of tunnel tube 1 is preferably an integer multiple of the span of the anchoring system. When the length of the tunnel tube 1 is equal to the span of the anchoring system, the anchoring system can be directly set at the longitudinal joint of the tunnel tube 1, and its transverse center axis is coplanar with the joint. By setting the anchoring system at the longitudinal joint of the tunnel tube 1, the deformation between the longitudinally adjacent tunnel tubes 1 can be constrained by the arc-shaped tube fixing truss 3, ensuring the safety of the tunnel at the joint.

[0123] Example 3

[0124] Anchoring installation method, which is applied to the anchoring system described in the above embodiment 2, is as follows:

[0125] S1, the anchoring foundation 5 is anchored in the seabed or riverbed stratum to provide anchoring force for the anchoring system;

[0126] S2, prepare four sections of tunnel tubes 1 that are parallel to each other;

[0127] S3, installing the truss type floating tunnel anchoring device at the longitudinal joint of the tunnel body 1 and connecting it to the anchoring foundation 5;

[0128] S4. When the tunnel body 1 needs to be extended, S1-S3 are repeated until the required tunnel length is reached.

[0129] Specifically, the tunnel body 1 is continuously extended to form an integral tunnel, and multiple anchoring system structures are distributed at a certain interval. The spacing of the anchoring system is determined according to the net buoyancy, hydrodynamic force and other loads borne by the tunnel body 1 and the span allowed by the bending resistance of the tunnel body 1. The anchoring force parameters of the anchoring system are determined according to the net buoyancy, hydrodynamic force and other loads that the anchoring system needs to balance.

[0130] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Truss type floating tunnel anchoring device, characterized in that: The device is used for fixing at least two suspended tunnel pipe bodies (1) so that the tunnel pipe body (1) is in a stable state in water under the action of buoyancy and anchoring force. The device comprises: A plurality of support mechanisms (2) for providing a base for installing the device on a tunnel pipe body (1); At least two arc-shaped tube body fixing trusses (3) for fixing the tunnel tube body (1); At least one connecting truss (4) used to connect the corresponding two arc-shaped tube fixed trusses (3); At least four anchoring foundations (5) for anchoring the suspended tunnel pipe body (1) and providing tension anchoring force for the device; each of the anchoring foundations (5) is vertically fixedly installed in the seabed or riverbed stratum; At least four anchor cable connection devices (6) are used to connect the four corners of the bottom end of the arc-shaped tube body fixed truss (3) to the corresponding anchor foundations (5), and to achieve load transfer between the arc-shaped tube body fixed truss (3) and the anchor foundation (5) through the anchor cable connection devices (6); The contact points between the arc-shaped tube body fixing truss (3) and the tunnel tube body (1) are connected via a support mechanism (2), thereby achieving circumferential shear dislocation and radial compression between the arc-shaped tube body fixing truss (3) and the tunnel tube body (1); The adjacent two ends of the two arc-shaped tube fixed trusses (3) are fixedly connected to the two ends of a connecting truss (4); The arc-shaped tube fixed truss (3) comprises: At least two upper chord arch ribs (301), each of the upper chord arch ribs (301) being arranged in parallel; At least two lower chord arch ribs (302), each of the lower chord arch ribs (302) being arranged in parallel; the lower chord arch rib (302) and the upper chord arch rib (301) being arranged concentrically; A plurality of fixed truss transverse connecting rods (303) for connecting two upper chord arch ribs (301) or two lower chord arch ribs (302); A plurality of fixed truss web members (304) for connecting the upper chord arch rib (301) and the lower chord arch rib (302) on the same side; A plurality of anchor cable connection points (305) for installing an anchor cable connection device (6), each of the anchor cable connection points (305) being located at the bottom of the arc-shaped tube body fixed truss (3); The connecting truss (4) comprises: A plurality of main chord rods (401), each main chord rod (401) being arranged parallel to each other to form a rectangular parallelepiped; A plurality of connecting truss web members (402), each of the connecting truss web members (402) being obliquely installed between two vertically parallel main chord members (401); A plurality of connecting truss transverse connecting rods (403), each of the connecting truss transverse connecting rods (403) being installed between two transversely parallel main chord rods (401); The fulcrum of the main chord (401) is arranged at the node of the upper chord arch rib (301) to effectively transfer the truss load; The length of the connecting truss (4) is 1.5D-2.0D of the clear distance between the two tunnel tube bodies (1), where D is the outer diameter of the tunnel tube body (1), and is used to reduce the flow-blocking load transmitted between the two tunnel tube bodies (1); The anchor cable connecting device (6) comprises: An anchor cable (601), wherein the anchor cable (601) is a steel wire rope with a protective layer attached thereto; A truss connector (602), wherein the truss connector (602) is installed on the anchor cable connection point (305); An anchor foundation connection piece (603), the anchor foundation connection piece (603) being installed on the top or side surface of the anchor foundation (5); at least two H-shaped connectors (604); at least two anchor cable connectors (605); The truss connector (602), one of the H-shaped connectors (604), one of the anchor cable connectors (605), the anchor cable (601), another anchor cable connector (605) and the anchor foundation connector (603) are connected in sequence.

2. The truss type floating tunnel anchoring device according to claim 1 is characterized in that: The support mechanism (2) comprises: An enlarged base (201), the enlarged base (201) being connected to the tunnel body (1) via a fastener; At least one layer of alloy steel plate (202); At least one layer of rubber (203) for vibration reduction and buffering of the arc-shaped tube body fixing truss (3); A connecting plate (204), wherein the connecting plate (204) is connected to the enlarged base (201) via a fastener; At least two angle plates (205), each of the angle plates (205) being installed on the connecting plate (204) in an inwardly inclined manner; The alloy steel plate (202) and the rubber (203) are located on the enlarged base (201) and are arranged in an alternating manner.

3. The truss type floating tunnel anchoring device according to claim 1, characterized in that: The interior of the tunnel pipe body (1) is a reinforced concrete pipe body (101), and the exterior is an aluminum alloy pipe body (102); the reinforced concrete pipe body (101) and the aluminum alloy pipe body (102) are nested together.

4. Anchoring system, characterized in that, The system comprises at least one truss-type floating tunnel anchoring device according to any one of claims 1 to 3.

5. The anchoring system according to claim 4, characterized in that: When the length of a single-section tunnel tube (1) is N times the span of the truss-type suspended tunnel anchoring device, 2, and is an integer, the truss-type suspended tunnel anchoring devices are arranged at the longitudinal joints of the tunnel body (1) and are distributed at equal intervals.

6. Anchorage installation method, characterized in that: The method is applied to the anchoring system according to claim 5, and the method is: S1. Anchor foundation (5) is anchored in the seabed or riverbed to provide anchoring force for the anchoring system; S2, preparing four tunnel tubes (1) in pairs; S3, installing the truss-type floating tunnel anchoring device at the longitudinal joint of the tunnel body (1) and connecting it to the anchoring foundation (5); S4. When it is necessary to extend the tunnel body (1), repeat S1-S3 until the required tunnel length is reached.

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