Seabed immersed tube tunnel reinforcing device, construction method and resetting method

Abstract

The invention discloses a seabed immersed tube tunnel reinforcing device, a construction method and a resetting method, and belongs to the technical field of tunnels. A seabed immersed tube tunnel reinforcing device comprises a tunnel body installed on a seabed foundation, a plurality of composite pile pieces are arranged in the seabed foundation, a broken stone hardcore connected with the composite pile pieces is installed on the surface of the seabed foundation, and a bag base layer is arranged on the upper surface of the broken stone hardcore. A bag adjusting layer connected with the tunnel body is mounted on the upper surface of the bag base layer; in an operation period and a post-earthquake observation period, attitude data of the tunnel body can be obtained in real time by utilizing a dynamic monitoring and adjusting mechanism constructed by the bag adjusting layer, the grouting device and the detection system, and once it is monitored that the attitude of the tunnel body deviates, the grouting device can be allocated in time, and according to data fed back by the detection system, the attitude of the tunnel body can be accurately detected. And grouting operation is rapidly conducted on the bag adjusting layer, and posture adjustment can be conducted on the specific portion of the tunnel body in a targeted mode by controlling the grouting pressure and the grouting amount.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tunnel, and particularly relates to a seabed immersed tube tunnel reinforcing device, a construction method and a resetting method. BACKGROUND

[0002] As an important form of cross-sea and cross-river traffic engineering, the immersed tube tunnel has the advantages of fast construction speed and wide water area adaptability, and has been widely applied in urban rail, road and cross-river channel construction. The immersed tube tunnel needs to be placed on the soft and saturated soil layer at the bottom of the water, and in the process of use, it faces engineering problems such as foundation liquefaction, structure floating, lateral sliding and differential settlement, especially under the action of earthquake or wave disturbance, which is more likely to cause the tunnel structure to move, deform and lose stability, and even fail to function.

[0003] In order to ensure the stability of the immersed tube tunnel structure, traditional engineering usually adopts traditional foundation reinforcing means such as precast pile foundation, gravel cushion and deep mixing, but such reinforcing means has certain limitations. Once the tunnel structure is tilted due to uneven settlement or vibration, the traditional method is often difficult to remedy or adjust the posture afterwards, and needs to be excavated and repaved, which has high construction cost and great risk. At the same time, although the gravel cushion can disperse stress, the overall performance of the ungrouted gravel cushion is poor, and it cannot form a continuous stress system with the PHC pile, which has poor structure coordination during the earthquake and is easy to cause differential settlement and local uneven damage. SUMMARY

[0004] The present application aims at the problems existing in the prior art, and provides a seabed immersed tube tunnel reinforcing device, a construction method and a resetting method.

[0005] In order to achieve the above-mentioned purpose, the application adopts the following technical scheme: a seabed immersed tube tunnel reinforcing device, comprising a tunnel body installed on a seabed foundation, a plurality of composite pile pieces are arranged in the seabed foundation, a gravel cushion connected with the composite pile pieces is installed on the surface of the seabed foundation, a bag base layer is arranged on the upper surface of the gravel cushion, the bag base layer comprises at least one layer of a plurality of first bag units, a bag adjusting layer connected with the tunnel body is installed on the upper surface of the bag base layer, the bag adjusting layer comprises at least one layer of a plurality of second bag units, a grouting main pipe is arranged on the tunnel body, a first grouting branch pipe, a second grouting branch pipe and a third grouting branch pipe are arranged on the grouting main pipe, the first grouting branch pipe is connected with the bag base layer, the second grouting branch pipe is connected with the bag adjusting layer, the third grouting branch pipe is connected with the gravel cushion, a grouting device for adjusting grouting pressure and filling control of the bag adjusting layer is arranged on the tunnel body, the grouting device is connected with the grouting main pipe, an anchoring assembly is arranged between the tunnel body and the seabed foundation, and a monitoring device for monitoring the posture change of the tunnel structure and transmitting posture adjustment data is arranged on the tunnel body.

[0006] By adopting the technical scheme, the composite pile member is arranged in the seabed foundation to enhance the bearing capacity of the foundation and provide a stable support foundation for the tunnel body. The gravel cushion layer is connected with the composite pile member to further disperse stress. Meanwhile, the capsule base layer and the capsule adjustment layer are arranged in cooperation with the grouting main pipe and branch pipes to enable grouting of the capsule as needed, to achieve flexible adjustment of the posture of the tunnel body after installation, during the operation period and during the post-earthquake observation period. The grouting device can adjust the grouting pressure and the filling of the capsule adjustment layer to ensure the accuracy of the adjustment process. The anchoring assembly firmly connects the tunnel body with the seabed foundation to enhance the anti-floating and anti-sliding capacity. The monitoring device monitors the posture change of the tunnel structure in real time to provide data support for subsequent posture adjustment.

[0007] Optionally, a plurality of bearing washers are arranged between the capsule base layer and the gravel cushion layer, between the capsule base layer and the capsule adjustment layer, and between the capsule adjustment layer and the tunnel body, respectively. A connecting piece is arranged between the first capsule unit and the second capsule unit.

[0008] By adopting the technical scheme, the arrangement of the bearing washers can further disperse and transmit stress between the layers, reduce stress concentration, improve the coordination and overall stability between the layers, enhance the bearing capacity of the structure under complex stress conditions, reduce the risk of damage caused by excessive local stress, and also help to better achieve the connection and interaction between the capsule base layer, the capsule adjustment layer and the tunnel body, making the mechanical properties of the entire reinforcement device more uniform and stable.

[0009] Optionally, the first capsule unit and the second capsule unit each include an outer capsule bag and an inner capsule bag arranged inside the outer capsule bag. A pressure sensor and an air vent are arranged on the outer capsule bag.

[0010] By adopting the technical scheme, the double-layer structure design of the outer capsule bag and the inner capsule bag enhances the strength and durability of the capsule, enabling it to better withstand the pressure after grouting and external loads. The pressure sensor can monitor the pressure change in the capsule in real time to provide accurate feedback control basis for the grouting process, ensuring the rationality of the grouting amount and grouting pressure, and avoiding capsule rupture or structural deformation caused by improper grouting. The air vent helps to vent air in the capsule during the grouting process, ensuring the compactness and uniformity of the grouting, and further improving the stability and reliability of the capsule base layer and the capsule adjustment layer.

[0011] Optionally, the first and second grouting branch pipes are respectively provided with a fixing member, the fixing member is connected with the outer bag of the bag, and the fixing member comprises a fixing base plate arranged on the outer periphery of the first and second grouting branch pipes, and the fixing base plate is connected with the outer bag of the bag through a screw rod, and the outer periphery of the screw rod is provided with a fixing nut.

[0012] By adopting the above technical scheme, the fixing member is arranged to firmly connect the grouting branch pipe with the outer bag of the bag, so that the connection stability between the grouting branch pipe and the bag during grouting is ensured, and displacement or loosening of the grouting branch pipe caused by pressure during grouting is avoided, thereby ensuring smooth grouting and uniformity of grouting effect.

[0013] Optionally, the grouting main pipe is connected with the first, second and third grouting branch pipes through a flow divider, and the flow divider arranged on the second and third grouting branch pipes is respectively provided with a control valve.

[0014] By adopting the above technical scheme, the flow divider is arranged to enable the grouting main pipe to distribute the slurry into a plurality of first, second and third grouting branch pipes according to requirements, and the control valve is arranged to control the grouting of the second and third grouting branch pipes according to actual requirements, so that the grouting of the adjustment layer and the gravel cushion of the bag can be respectively controlled, the flexibility and accuracy of the grouting operation are improved, the reinforcement requirements of different areas are better adapted, and the performance and function of the entire reinforcement device are further optimized.

[0015] Optionally, the composite pile member comprises a plurality of pipe piles, the plurality of pipe piles are arranged longitudinally on the seabed foundation, and the two ends of the plurality of pipe piles are respectively provided with pre-buried members, the upper end pre-buried member is connected with the gravel cushion, and the lower end pre-buried member is connected with the seabed foundation.

[0016] By adopting the above technical scheme, the composite pile member is composed of the longitudinally arranged pipe piles and the pre-buried members at the two ends of the pipe piles, which can fully exert the bearing capacity of the pipe piles, effectively transmit the upper load to the deep seabed foundation, and enhance the overall stability of the foundation. The upper end pre-buried member is connected with the gravel cushion, and the lower end pre-buried member is connected with the seabed foundation, thereby realizing good connection between the pipe piles and the upper and lower structures, forming a whole stress system of the composite pile member, the gravel cushion and the seabed foundation, and improving the cooperative working performance of the entire reinforcement device, which better resists the influence of adverse factors such as foundation liquefaction and differential settlement on the tunnel body.

[0017] Optionally, the anchoring assembly comprises an anchor rod connected with the seabed foundation, the outer periphery of the anchor rod is provided with a fixing seat connected with the surface of the seabed foundation, the upper end of the anchor rod is provided with a fixing column, and the fixing column is provided with an anchor line connected with the tunnel body at one end.

[0018] By adopting the technical scheme, the anchoring assembly provides additional anti-floating and anti-sliding capacity for the tunnel body, the firm connection of the anchor rod with the seabed foundation and the auxiliary fixing effect of the fixing seat ensure the stability of the anchor rod in the seabed foundation, the connecting mode of the fixing column and the anchor line tightly combines the tunnel body with the anchor rod to form an integrated anti-floating and anti-sliding structure, effectively resisting the possible floating and lateral sliding under the action of external forces such as earthquakes and waves, further enhancing the stability of the immersed tunnel and improving the safety and reliability thereof in complex marine environments.

[0019] Optionally, the monitoring device comprises inclination angle sensors and displacement sensors distributed in various regions of the tunnel body, a Beidou positioning terminal for monitoring the tunnel body, a data processing module on the tunnel body for collecting and processing data of the inclination angle sensors, the displacement sensors and the Beidou positioning terminal, and a signal transmission module installed on the tunnel body for transmitting monitoring signals to a monitoring center.

[0020] By adopting the technical scheme, the monitoring device is arranged to realize real-time and comprehensive monitoring of the attitude change of the tunnel body structure, the inclination angle sensors, the displacement sensors and the Beidou positioning terminal respectively acquire lateral, longitudinal inclination data, settlement data and three-dimensional position coordinates and other information of the tunnel body from different angles, the data processing module collects and processes these data, so that the stress state and deformation condition of the tunnel body can be timely and accurately mastered, the signal transmission module timely transmits monitoring signals to the monitoring center, providing a basis for subsequent analysis and decision-making, so that the staff can timely discover potential safety hazards and take corresponding measures for processing, thereby ensuring the safe and stable operation of the immersed tunnel during the operation period.

[0021] Optionally, a construction method of a seabed immersed tunnel reinforcing device comprises the following steps: Dredging and flattening the seabed foundation of the construction area; Drilling a longitudinal hole in the seabed foundation according to the design pile position, filling the pipe pile and grouting around the pipe pile to form the composite pile piece; Laying the gravel cushion layer on the composite pile piece in layers, and installing the third grouting branch pipe after compaction treatment; Arranging and combining a plurality of first bag units according to the design to form the bag base layer as a whole by the connecting sheet, the first bag units can be arranged in one or more layers, the bearing pad is arranged between the first bag units and the gravel cushion layer, and the first grouting branch pipe is installed on the first bag units; In the same way, a plurality of the second bag units are connected into the bag adjustment layer, the second bag units can be arranged in one or more layers, the bearing pads are arranged between the bag adjustment layer and the bag base layer and the contact surface of the tunnel body, and the second grouting branch pipes are installed on the second bag units; A pair of anchor rods are installed on the seabed foundation, the tunnel body is placed on the bag adjustment layer, and the tunnel body and the anchor rods are connected by the anchor wires to form an integrated anti-floating and anti-sliding structure; The inclination angle sensors and the displacement sensors are installed in each region of the tunnel body according to the design; After the integrated installation is completed, the first bag units of the multi-layer structure on the bag base layer are sequentially grouted according to the settlement data transmitted by the displacement sensors.

[0022] By using the above technical solutions, the construction method forms a complete immersed tunnel reinforcement construction process from the dredging and leveling of the seabed foundation to the installation of the composite pile, the laying of the gravel cushion, the assembly of the bag base layer and the bag adjustment layer, the installation of the anchoring assembly, the arrangement of the monitoring device, and finally the grouting treatment. This construction method can ensure the correct installation and good connection of each structural part, so that the performance of the entire reinforcement device is fully utilized. At the same time, the bag base layer is grouted according to the settlement data transmitted by the displacement sensors, which realizes dynamic adjustment and optimization during the construction process, further improves the construction quality and reinforcement effect, and effectively solves the problems of high construction cost, high risk, and difficulty in post-repair in the traditional construction method.

[0023] Optionally, a resetting method of a seabed immersed tunnel reinforcement device, the resetting method comprising the following steps: During the operation period and the post-earthquake observation period of the tunnel body, the inclination angle sensors in each region acquire real-time transverse and longitudinal inclination data, the displacement sensors acquire real-time settlement data, and the Beidou positioning terminal acquires real-time three-dimensional position coordinates and overall monitoring data; The data processing module receives the transverse and longitudinal inclination data, the settlement data, and the monitoring data transmitted by each region, compares them with standard attitude data using a preset algorithm model, calculates the transverse inclination deviation, the longitudinal inclination deviation, and the settlement deviation, and determines the overall spatial position change; If the transverse or longitudinal inclination deviation of a region of the tunnel body exceeds the safe range, the signal transmission module transmits a signal to the monitoring center, the monitoring center adjusts the grouting device to the deviation region, sequentially grouts the second bag units on the positioning bag adjustment layer according to the feedback of the data processing, and sequentially controls the grouting device to perform grouting treatment on the second bag units of the multi-layer structure through the second grouting branch pipes, so that the tunnel body returns to the design position; If the settlement deviation of a certain area exceeds the safe range, the grouting device forms a rigid cushion layer by grouting the gravel cushion layer and the corresponding settlement position through the third grouting branch, and after solidification, the second bag unit in the bag adjustment layer that needs to be grouted is grouted and adjusted, so that the tunnel body restores to the design position; After the tunnel body posture adjustment is completed, the monitoring device continues to closely monitor.

[0024] By adopting the above technical scheme, the reset method uses the tunnel body inclination data, settlement data and three-dimensional position coordinates and other information obtained by the monitoring device in real time, and analyzes and processes them through the data processing module, so that the spatial position change of the tunnel body can be quickly and accurately determined, and when the inclination deviation or settlement deviation of a certain area of the tunnel body is found to exceed the safe range, the signal transmission module timely transmits the signal to the monitoring center, and the monitoring center calls the grouting device to grout the bag adjustment layer or gravel cushion layer of the corresponding area according to the feedback result of the data processing, so as to realize effective adjustment and recovery of the tunnel body posture. The whole reset process has high automation degree, fast response speed and high adjustment precision, can timely correct the deviation of the tunnel body during the operation period and the post-earthquake observation period, ensure that it always remains at the design position, avoid the functional failure caused by structural dislocation and deformation instability, greatly improve the service life and operation safety of the immersed tunnel, and reduce the maintenance cost and risk.

[0025] Compared with the prior art, the beneficial effects of the present application are: 1. During the operation period and the post-earthquake observation period, the dynamic monitoring and adjustment mechanism constructed by the bag adjustment layer, the grouting device and the detection system can obtain the posture data of the tunnel body in real time, and once the tunnel body posture deviates, the grouting device can be promptly deployed and grouting operation can be quickly performed on the bag adjustment layer according to the data feedback of the detection system, so that the posture of the specific part of the tunnel body can be adjusted in a targeted manner by controlling the grouting pressure and the grouting amount, and the tunnel body can always remain at the design position in the complex and changeable operation environment, effectively avoiding the functional failure caused by structural dislocation and deformation instability, and greatly improving the stability and reliability of the immersed tunnel.

[0026] 2. The present application provides an efficient solution for the leveling operation of the tunnel body by the cooperation between the grouting device, the grouting main pipe, the first grouting branch and the bag base layer. If settlement problem occurs during tunnel laying, the bag base layer can be grouted by using this set of device, the grouting amount and grouting position can be flexibly adjusted according to the settlement condition, the effective leveling of the tunnel body is realized, and the tunnel body is restored to the design height and horizontal state. The design of the multiple first bag units on the bag base layer can again be leveled by grouting after the tunnel has a secondary settlement.

[0027] 3. The anchor assembly provides the tunnel with reliable anti-floating and anti-slip capabilities. The anchor's secure connection to the seabed foundation, coupled with the auxiliary fixing function of the anchor, ensures the anchor's stability in the seabed foundation. The anchor increases the contact area between the anchor and the seabed foundation, enhancing the anchoring force and enabling the anchor to better withstand the upward buoyancy and lateral slippage generated by the tunnel.

[0028] 4. With the cooperation of the third grouting branch, the crushed stone cushion layer can be filled and consolidated to form an integral rigid cushion layer. Together with the composite piles, it forms a pile-raft load-bearing system, achieving a synergistic improvement in bearing capacity, rigidity, and seismic resistance. This system not only significantly enhances foundation stability and reduces settlement differences, but also effectively resists dynamic loads such as earthquakes, ensuring structural safety.

[0029] 5. The design of the monitoring device enables real-time and comprehensive monitoring of changes in the tunnel's structural posture, enabling staff to understand the stress state and deformation of the tunnel in real time. Once potential safety hazards are discovered, staff can take timely measures based on the monitoring data to ensure the safe and stable operation of the immersed tube tunnel during operation. This comprehensive and real-time monitoring device provides strong data support for the maintenance and management of the tunnel, greatly improving operation and maintenance efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the connection structure between the pouch base layer and the pouch adjustment layer of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the pipe pile of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the second pouch unit of the present invention; Figure 5 It is a schematic diagram of the overall structure of the anchoring assembly of the present invention.

[0031] In the figure: 1. Composite pile; 101. Pipe pile; 102. Embedded parts; 2. Gravel cushion; 3. Bag base layer; 31. Load-bearing gasket; 4. First bag unit; 5. Bag adjustment layer; 6. Second bag unit; 61. Connecting piece; 62. Bag outer bag; 63. Bag inner bag; 64. Pressure sensor; 7. Grouting main pipe; 8. First grouting branch pipe; 9. Second grouting branch pipe; 91. Fixing part; 911. Fixing plate; 912. Screw; 913. Fixing nut; 10. Third grouting branch pipe; 11. Grouting device; 12. Anchor assembly; 1201. Anchor rod; 1202. Fixing seat; 1203. Fixing column; 1204. Anchor wire; 13. Monitoring device; 14. Seabed foundation; 15. Tunnel body. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0034] like Figure 1 As shown in FIG. 5 , a specific embodiment is as follows: a submarine immersed tube tunnel reinforcement device includes a tunnel body 15 installed on a submarine foundation 14, a plurality of composite pile members 1 are provided in the submarine foundation, and the composite pile members 1 include a plurality of pipe piles 101, and the pipe piles 101 are made of prestressed high-strength concrete. The plurality of pipe piles 101 are longitudinally arranged on the submarine foundation 14, and embedded parts 102 are respectively provided at both ends of the plurality of pipe piles 101, and the embedded parts 102 at the lower ends are connected to the submarine foundation. As the foundational support structure for the reinforcement system, prestressed high-strength concrete piles 101 possess high strength, capable of withstanding significant loads and providing stable support for the entire tunnel body 15. By being arranged longitudinally and embedded deep within the seabed foundation, these piles effectively transmit the upper load deep within the foundation, enhancing the stability of the tunnel on the seabed 14 and effectively improving the bearing capacity of the tunnel foundation. This reduces the risk of deformation and damage to the tunnel caused by uneven foundation settlement, thereby ensuring the safety and stability of the tunnel structure.

[0035] The surface of the submarine foundation is installed with a gravel cushion layer 2 connected to the composite pile member 1, and the embedded part 102 at the upper end is connected to the gravel cushion layer 2. On the one hand, the gravel cushion layer 2 can disperse stress and further disperse the load transmitted from the tunnel body 15 to the submarine foundation 14, thereby reducing local stress concentration; on the other hand, with the cooperation of the third grouting branch pipe 10, it can be filled and consolidated to form an overall rigid cushion layer. The gravel cushion layer 2 and the composite pile member 1 form a pile-raft bearing system, which achieves a coordinated improvement in bearing capacity, stiffness and seismic resistance. This system significantly enhances foundation stability, reduces settlement differences, and can effectively resist dynamic loads such as earthquakes to ensure structural safety.

[0036] The upper surface of the gravel cushion layer 2 is provided with a bag base layer 3, the bag base layer 3 includes at least one layer of a plurality of first bag units 4, the bag base layer 3 can bear a certain load and be grouted through the first grouting branch pipe 8 on the grouting main pipe 7, the load bearing pad 31 can further disperse and transmit the stress between the bag base layer 3 and the gravel cushion layer 2, reduce the stress concentration phenomenon, improve the coordination and overall stability between the layers, if settlement problem occurs during tunnel laying, the grouting device 11 can be used to grout the bag base layer 3, the grouting amount and grouting position can be flexibly adjusted according to the settlement condition, the preliminary leveling of the tunnel body 15 is realized, and the design of the multiple layers of first bag units 4 on the bag base layer 3 can realize leveling again through grouting after secondary activity and multiple settlement of the tunnel. The upper surface of the bag base layer 3 is provided with a bag adjusting layer 5 connected with the tunnel body 15, the bag adjusting layer 5 includes at least one layer of a plurality of second bag units 6, during the operation period and the post-earthquake observation period, the bag adjusting layer 5 can be grouted through the second grouting branch pipe 9 on the grouting main pipe 7 according to the posture data of the tunnel body 15 fed back by the monitoring device 13, the posture of the tunnel body 15 is flexibly adjusted, the tunnel body 15 can always be kept at the designed position in the complex and changeable operation environment, the functional failure caused by structural dislocation, deformation and instability is effectively avoided, and the stability and reliability of the immersed tunnel are greatly improved.

[0037] A plurality of load bearing pads 31 are respectively arranged between the bag base layer 3 and the gravel cushion layer 2, between the bag base layer 3 and the bag adjusting layer 5, and between the bag adjusting layer 5 and the tunnel body 15, a connecting sheet 61 is arranged between the first bag unit 4 and the second bag unit 6, the load bearing pad 31 can further disperse and transmit the stress between the bag base layer 3 and the gravel cushion layer 2, reduce the stress concentration phenomenon, improve the coordination and overall stability between the layers, and the connecting sheet 61 connects the first bag unit 4 and the second bag unit 6 into a whole. The first bag unit 4 and the second bag unit 6 respectively include a bag outer bag 62 and a bag inner bag 63 arranged inside the bag outer bag 62, the bag outer bag 62 is provided with a pressure sensor 64 and an air vent, the double-layer structure design of the bag outer bag 62 and the bag inner bag enhances the strength and durability of the bag, the pressure sensor 64 can monitor the pressure change in the bag in real time, provide accurate feedback control basis for the grouting process, and the air vent helps to discharge air in the bag during the grouting process, ensures the compactness and uniformity of grouting.

[0038] The tunnel body 15 is provided with a grouting main pipe 7, and the feeding end of the grouting main pipe 7 is provided with a hand valve. After each use, the grouting main pipe 7 needs to be cleaned. The grouting main pipe 7 is provided with a first grouting branch pipe 8, a second grouting branch pipe 9 and a third grouting branch pipe 10. The grouting main pipe 7 is connected with the first grouting branch pipe 8, the second grouting branch pipe 9 and the third grouting branch pipe 10 through a flow divider. The flow divider of the second grouting branch pipe 9 and the third grouting branch pipe 10 is respectively provided with a control valve. The first grouting branch pipe 8 is connected with the bag base layer 3. The second grouting branch pipe 9 is connected with the bag adjusting layer 5. The third grouting branch pipe 10 is connected with the gravel cushion layer 2. The first grouting branch pipe 8 and the second grouting branch pipe 9 are respectively provided with a fixing piece 91. The fixing piece 91 is connected with the outer bag 62. The fixing piece 91 includes a fixing pad plate 911 installed on the outer periphery of the first grouting branch pipe 8 and the second grouting branch pipe 9. The fixing pad plate 911 is connected with the outer bag 62 through a screw rod 912. The outer periphery of the screw rod 912 is provided with a fixing nut 913. The grouting main pipe 7 is a conveying channel of slurry, and distributes the slurry provided by the grouting device 11 to each grouting branch pipe. The first grouting branch pipe 8 is connected with the bag base layer 3, and is used for grouting the bag base layer 3. The second grouting branch pipe 9 is connected with the bag adjusting layer 5, and is used for grouting the bag adjusting layer 5 to adjust the posture of the tunnel body 15. The third grouting branch pipe 10 is connected with the gravel cushion layer 2, and is used for grouting the gravel cushion layer 2 to form a rigid cushion layer. The flow divider and the control valve can control the distribution of the slurry according to actual needs. The fixing piece 91 ensures the stability of the connection between the grouting branch pipe and the bag during the grouting process, provides an efficient solution for the leveling operation and the posture adjustment of the tunnel body 15, improves the flexibility of the grouting operation, and better adapts to the reinforcement needs of different areas.

[0039] The tunnel body 15 is provided with a grouting device 11 for grouting pressure adjustment and filling control of the bag adjusting layer 5. The grouting device 11 includes a grouting vehicle. The grouting device 11 is connected with the grouting main pipe 7. During the operation period or after the earthquake, the grouting vehicle can perform grouting operation on the bag base layer 3, the bag adjusting layer 5 or the gravel cushion layer 2 through the grouting main pipe 7 and each grouting branch pipe according to the data fed back by the monitoring device 13, so as to adjust and reset the posture of the tunnel body 15. The grouting pressure and the grouting amount can be controlled to ensure the accuracy of the adjustment process, and effectively solve the problems of settlement and posture deviation of the tunnel body 15. The tunnel body 15 is provided with an anchoring assembly 12 between the tunnel body 15 and the seabed foundation, the anchoring assembly 12 comprises an anchor rod 1201 connected with the seabed foundation, the outer periphery of the anchor rod 1201 is provided with a fixing seat 1202 connected with the surface of the seabed foundation, the upper end of the anchor rod 1201 is provided with a fixing column 1203, the fixing column 1203 is provided with an anchor line 1204 connected with the tunnel body 15 at one end, the fixing column 1203 and the tunnel body 15 are respectively provided with anchor holes for connecting the anchor line 1204, the design of the anchor line 1204 forms a stable constraint structure system between the tunnel body 15 and the anchoring assembly 12, the anchoring assembly 12 provides reliable anti-floating and anti-sliding capacity for the tunnel body 15, the anchor rod 1201 is firmly connected with the seabed foundation, the fixing seat 1202 increases the contact area of the anchor rod 1201 and the seabed foundation, improves the anchoring force, and enables the anchor rod 1201 to better withstand the upward floating force and lateral sliding of the tunnel body 15, the fixing column 1203 and the anchor line 1204 tightly combine the tunnel body 15 and the anchor rod 1201 to form an integrated anti-floating and anti-sliding structure, effectively resist the upward floating and lateral sliding that may be generated under the action of external forces such as earthquakes and waves, further enhance the stability of the immersed tunnel, and improve the safety and reliability of the immersed tunnel in complex marine environments.

[0040] The tunnel body 15 is provided with a monitoring device 13 for monitoring the attitude change of the tunnel structure and transmitting attitude adjustment data, the monitoring device 13 comprises inclination angle sensors and displacement sensors distributed in various regions of the tunnel body 15, and a Beidou positioning terminal for monitoring the tunnel body 15, the tunnel body 15 is provided with a data processing module for collecting and processing data of a plurality of inclination angle sensors, a plurality of displacement sensors and the Beidou positioning terminal, and the tunnel body 15 is provided with a signal transmission module for transmitting monitoring signals to a monitoring center, the inclination angle sensors, the displacement sensors and the Beidou positioning terminal respectively acquire transverse, longitudinal inclination data, settlement data and three-dimensional position coordinates and other information of the tunnel body 15 from different angles, the data processing module collects and processes these data, and the signal transmission module timely transmits the monitoring signals to the monitoring center, realizes real-time and comprehensive monitoring of the attitude change of the tunnel body 15, enables the staff to master the stress state and deformation condition of the tunnel body 15 in real time, once potential safety hazards are found, the staff can timely take corresponding measures for processing according to the monitoring data, ensures the safe and stable operation of the immersed tunnel during the operation period, provides strong data support for the maintenance and management of the tunnel body 15, and greatly improves the operation and maintenance efficiency and safety.

[0041] A construction method of a seabed immersed tunnel reinforcing device, the construction method comprises the following steps: The professional dredging equipment is used to dredge the seabed foundation of the construction area, and the silt and sundries on the seabed foundation surface are removed, so that the seabed foundation surface is clean and flat, and a good foundation condition is provided for subsequent construction. According to the design pile position, longitudinal drilling operation is performed on the seabed foundation 14, and the depth, diameter and perpendicularity of the drilling are strictly controlled during the drilling process to ensure that the drilling meets the design requirements. The pipe pile 101 made of prestressed high-strength concrete is hoisted into the drilling, and the two ends of the pipe pile 101 are respectively provided with embedded parts 102. The lower end embedded part 102 is connected with the seabed foundation. The concrete is injected around the pipe pile 101, and the density and uniformity of the grouting process are ensured to make the pipe pile 101 and the surrounding foundation form an integral whole, and enhance the bearing capacity of the foundation. The gravel cushion layer 2 is layered above the composite pile 1, and the thickness and particle size of the gravel cushion layer 2 should meet the design requirements. The road roller or other compaction equipment is used to compact the gravel cushion layer 2 to ensure that the density of the gravel cushion layer 2 reaches the design requirements. The third grouting branch pipe 10 is installed on the compacted gravel cushion layer 2, and the third grouting branch pipe 10 is connected with the grouting main pipe 7. A plurality of first bag units 4 are arranged and combined according to the design requirements. The first bag unit 4 can be arranged in one layer or multiple layers. The first bag unit 4 is connected into an integral bag base layer 3 by using the connecting sheet 61. The bearing pad 31 is arranged between the bag base layer 3 and the gravel cushion layer 2. The bearing pad 31 can further disperse and transfer stress, reduce stress concentration, improve the coordination and overall stability between layers. The first grouting branch pipe 8 is installed on the plurality of first bag units 4, and the first grouting branch pipe 8 is connected with the grouting main pipe 7 for grouting operation of the bag base layer 3. In the same way, a plurality of second bag units 6 are connected into a bag adjusting layer 5. The second bag unit 6 can be arranged in one layer or multiple layers. When connected, the connection between the bag units should be tight and neat. The bearing pad 31 is arranged between the bag adjusting layer 5 and the bag base layer 3 and between the contact surface of the tunnel body 15. The bearing pad 31 can further disperse and transfer stress, reduce stress concentration, improve the coordination and overall stability between layers. The second grouting branch pipe 9 is installed on the second bag unit 6, and the second grouting branch pipe 9 is connected with the grouting main pipe 7 for grouting operation of the bag adjusting layer 5 to adjust the posture of the tunnel body 15. A pair of anchor rods 1201 is installed on the seabed foundation 14. The outer periphery of the anchor rod 1201 is provided with a fixing seat 1202 connected with the seabed foundation surface. The fixing seat 1202 can increase the contact area of the anchor rod 1201 with the seabed foundation and improve the anchoring force. The tunnel body 15 is placed on the bag adjusting layer 5, and the anchor line 1204 is used to connect the tunnel body 15 and the anchor rod 1201, one end of the anchor line 1204 is connected with the tunnel body 15, and the other end is connected with the fixed column 1203 of the anchor rod 1201, thereby forming an integrated anti-floating and anti-sliding structure; According to the design requirements, the inclination angle sensor and the displacement sensor are installed in each region of the tunnel body 15, the installation position of the sensor should be accurate and firm, and the structural posture change of the tunnel body 15 can be accurately monitored, After the overall installation is completed, the settlement data of the tunnel body 15 is monitored in real time through the displacement sensor, the data is transmitted to the monitoring center for analysis and processing, the first bag unit 4 of the multi-layer structure on the bag base layer 3 is sequentially grouted according to the settlement data transmitted by the displacement sensor, and the grouting amount and the grouting position are flexibly adjusted according to the settlement condition during the grouting process, so that the tunnel body 15 is preliminarily leveled.

[0042] A resetting method of a submarine immersed tube tunnel reinforcing device, the resetting method comprises the following steps: During the operation period and the post-earthquake observation period of the tunnel body 15, the inclination angle sensor in each region obtains the transverse and longitudinal inclination data in real time, the displacement sensor obtains the settlement data in real time, and the Beidou positioning terminal obtains the three-dimensional position coordinates and the overall monitoring data in real time; The data processing module receives the transverse and longitudinal inclination data, the settlement data and the monitoring data transmitted by each region, compares them with the standard posture data by using a preset algorithm model, calculates the transverse inclination deviation, the longitudinal inclination deviation and the settlement deviation, and determines the overall spatial position change; If the transverse or longitudinal inclination deviation of a region of the tunnel body 15 exceeds the safe range, the signal transmission module transmits a signal to the monitoring center, the monitoring center adjusts the grouting device 11 to the deviation region, controls the grouting device 11 to sequentially grout the second bag unit 6 of the multi-layer structure on the positioning bag adjusting layer 5 according to the feedback of the data processing, and sequentially grouts the second bag unit 6 of the multi-layer structure through the second grouting branch pipe 9, so that the tunnel body 15 returns to the design position; If the settlement deviation of a region exceeds the safe range, the grouting device 11 grouts the gravel cushion layer 2 and the corresponding settlement position through the third grouting branch pipe 10 to form a rigid cushion layer, and grouts the second bag unit 6 of the bag adjusting layer 5 that needs to be grouted after solidification, so that the tunnel body 15 returns to the design position; After the posture adjustment of the tunnel body 15 is completed, the monitoring device 13 continues to closely monitor.

[0043] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A submarine immersed tube tunnel reinforcement device, comprising a tunnel body installed on a submarine foundation, characterized in that: A plurality of composite piles are provided in the submarine foundation, a gravel cushion layer connected to the composite piles is installed on the surface of the submarine foundation, a bag base layer is provided on the upper surface of the gravel cushion layer, the bag base layer includes at least one layer of a plurality of first bag units, a bag adjustment layer connected to the tunnel body is installed on the upper surface of the bag base layer, the bag adjustment layer includes at least one layer of a plurality of second bag units, a grouting main pipe is provided on the tunnel body, a first grouting branch pipe, a second grouting branch pipe and a third grouting branch pipe are provided on the grouting main pipe, the first grouting branch pipe is connected to the bag base layer, the second grouting branch pipe is connected to the bag adjustment layer, and the third grouting branch pipe is connected to the gravel cushion layer, a grouting device for adjusting the grouting pressure and controlling the filling of the bag adjustment layer is provided on the tunnel body, the grouting device is connected to the grouting main pipe, an anchoring assembly is provided between the tunnel body and the submarine foundation, and a monitoring device for monitoring changes in the tunnel structure posture and transmitting posture adjustment data is provided on the tunnel body.

2. The submarine immersed tube tunnel reinforcement device according to claim 1, characterized in that: A plurality of bearing pads are respectively installed between the bladder base layer and the gravel cushion layer, between the bladder base layer and the bladder adjustment layer, and between the bladder adjustment layer and the tunnel body. A connecting piece is provided between the first bladder unit and the second bladder unit.

3. The submarine immersed tube tunnel reinforcement device according to claim 1, characterized in that: The first pouch unit and the second pouch unit respectively include a pouch outer bag and a pouch inner bag arranged inside the pouch outer bag, and a pressure sensor and an exhaust hole are provided on the pouch outer bag.

4. The submarine immersed tube tunnel reinforcement device according to claim 3, characterized in that: The first grouting branch pipe and the second grouting branch pipe are respectively equipped with fixing parts, which are connected to the outer bag of the bladder. The fixing parts include fixing pads installed on the outer periphery of the first grouting branch pipe and the second grouting branch pipe. The fixing pads are connected to the outer bag of the bladder through screws, and a fixing nut is provided on the outer periphery of the screws.

5. The submarine immersed tube tunnel reinforcement device according to claim 1, characterized in that: The grouting main pipe is connected to the first grouting branch pipe, the second grouting branch pipe and the third grouting branch pipe through a diverter, and the diverters on the second grouting branch pipe and the third grouting branch pipe are respectively provided with control valves.

6. The submarine immersed tunnel reinforcement device according to claim 1, characterized in that: The composite piles include a plurality of pipe piles, which are longitudinally arranged on the seabed foundation. Both ends of the pipe piles are provided with embedded parts, the upper end embedded parts are connected to the gravel cushion layer, and the lower end embedded parts are connected to the seabed foundation.

7. The submarine immersed tube tunnel reinforcement device according to claim 1, characterized in that: The anchoring assembly includes an anchor rod connected to the seabed foundation, a fixing seat connected to the surface of the seabed foundation is provided on the outer periphery of the anchor rod, a fixing column is installed on the upper end of the anchor rod, and an anchor wire is provided on the fixing column at one end connected to the tunnel body.

8. The submarine immersed tube tunnel reinforcement device according to claim 1, characterized in that: The monitoring device includes inclination angle sensors and displacement sensors distributed in various areas of the tunnel body, and a Beidou positioning terminal for monitoring the tunnel body. A data processing module is installed on the tunnel body to collect and process data from several of the inclination angle sensors, several displacement sensors and the Beidou positioning terminal. A signal transmission module is installed on the tunnel body to transmit monitoring signals to a monitoring center.

9. The construction method of a submarine immersed tube tunnel reinforcement device according to any one of claims 1 to 8, characterized in that: The construction method comprises the following steps: Desilting and leveling the seabed foundation in the construction area; Drilling holes longitudinally in the seabed foundation according to the designed pile positions, burying the pipe piles and performing grouting around them to form the composite piles; Laying the crushed stone cushion layer in layers on top of the composite pile, and installing the third grouting branch pipe after compaction; Arrange and combine a plurality of the first bag units according to the design, and connect them with the connecting piece to form the whole bag base layer. The first bag units can be arranged in one layer or multiple layers, and the bearing pads are installed between the first bag units and the crushed stone cushion layer. The first grouting branches are installed on the plurality of the first bag units; In the same manner, a plurality of the second bag units are connected to form the bag adjustment layer. The second bag units can be arranged in one or more layers. The bearing gasket is installed between the bag adjustment layer and the bag base layer and between the contact surface with the tunnel body, and the second grouting branch pipe is installed on the second bag unit. Install a pair of anchor rods on the seabed foundation, place the tunnel body on the bag adjustment layer, and connect the tunnel body and the anchor rods with the anchor wire to form an overall anti-floating and anti-slip structure; Install the tilt angle sensor and the displacement sensor in each area of ​​the tunnel body according to the design; After the overall installation is completed, the first bag units of the multi-layer structure on the bag base layer are grouting in sequence according to the settlement data transmitted by the displacement sensor.

10. The method for resetting a submarine immersed tunnel reinforcement device according to claim 9, wherein: The reset method includes the following steps: During the operation period and post-earthquake observation period of the tunnel body, the tilt angle sensors in each area acquire real-time lateral and longitudinal tilt data, the displacement sensors acquire real-time settlement data, and the Beidou positioning terminal acquires real-time three-dimensional position coordinates and overall monitoring data; The data processing module receives the lateral and longitudinal tilt data, settlement data and monitoring data transmitted from each area, compares them with the standard posture data using a preset algorithm model, calculates the lateral tilt deviation, longitudinal tilt deviation and settlement deviation, and determines the overall spatial position change; If the horizontal or vertical tilt deviation of a certain area of ​​the tunnel body exceeds the safe range, the signal transmission module transmits a signal to the monitoring center, and the monitoring center adjusts the grouting device to the deviation area, and controls the grouting device to sequentially perform grouting on the second bag units of the multi-layer structure through the second grouting branch pipe according to the data processing feedback, so that the tunnel body returns to the designed position; If the settlement deviation in a certain area exceeds the safety range, the grouting device injects grout into the gravel cushion layer and the corresponding settlement part through the third grouting branch pipe to form a rigid cushion layer. After solidification, the second bag unit that needs to be grouted in the bag adjustment layer is grouted to adjust the tunnel body to restore the designed position; After the tunnel body posture adjustment is completed, the monitoring device continues to closely monitor.

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