A comprehensive utility tunnel suitable for island and reef environments

Abstract

This application discloses an integrated utility tunnel suitable for island and reef environments, comprising an inner tunnel, an outer tunnel, a microplastic composite (MICP) impermeable body, an adaptive composite damping device, a sensing device, a control device, and a power supply device. The outer tunnel and the inner tunnel are coaxially arranged to form a vacuum cavity. An array of adaptive composite damping devices is disposed within the vacuum cavity and connected between the inner and outer tunnels for structural adjustment when the tunnel deforms. The MIP impermeable body surrounds the outer tunnel, reinforcing the surrounding foundation for seepage prevention. The sensing device detects structural deformation of the tunnel, and the control device controls the adaptive composite damping device to generate reset deformation based on the structural deformation. A thermoelectric power generation assembly provides power to various electrical devices. The integrated utility tunnel of this application can simultaneously achieve adaptive structural adjustment, foundation seepage prevention reinforcement, and energy self-sufficiency, significantly improving the structural stability, seepage prevention performance, and long-term operational reliability of the integrated utility tunnel in complex marine environments.

Description

Technical Field

[0001] This application relates to the field of marine engineering technology, and in particular to an integrated utility tunnel suitable for island and reef environments. Background Technology

[0002] With the development of marine engineering and island infrastructure construction, underground utility tunnels in island and reef areas, as core nodes of maritime strategy, are the "lifeline" for ensuring the normal operation of infrastructure such as power, communication, and water supply and drainage. Their long-term stable service is directly related to the operational safety and strategic value of the islands and reefs. However, the island and reef environment is significantly different from the terrestrial environment. Under the special geographical and environmental conditions of islands and reefs, the underground soil is mostly coral sand or loose reclaimed soil, with high porosity and poor structural stability. At the same time, the seawater has high salinity and strong permeability, which easily causes corrosion and seepage to the tunnel structure. In addition, island and reef areas are also susceptible to the impact of wave impact, temperature changes, and foundation settlement, which can cause vibration or deformation of the tunnel structure.

[0003] However, existing integrated utility tunnels typically adopt single-layer or ordinary double-layer structures, which mainly rely on their own rigidity to resist external loads. Once the tunnel deforms, it is often difficult to restore the structure in a timely manner. Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in the prior art. This application provides a comprehensive utility tunnel suitable for island and reef environments, capable of simultaneously achieving structural adaptive adjustment, foundation seepage prevention and reinforcement, and energy self-sufficiency, significantly improving the structural stability, seepage prevention performance, and long-term operational reliability of the comprehensive utility tunnel in complex marine environments.

[0005] The integrated utility tunnel suitable for island and reef environments according to embodiments of this application includes:

[0006] Inner pipe gallery;

[0007] The outer tube gallery is coaxially arranged with the inner tube gallery and a vacuum cavity is provided between them;

[0008] The MICP impermeable body is arranged outside the outer layer of the pipe gallery and is configured to reinforce the external foundation by inducing calcium carbonate deposition through microorganisms.

[0009] Several adaptive composite damping devices are arranged in an array in the vacuum cavity. One end of each adaptive composite damping device is connected to the outer side of the inner tube gallery, and the other end is connected to the inner side of the outer tube gallery.

[0010] A sensing device configured to detect structural deformation of the integrated utility tunnel;

[0011] A control device connected to the sensing device, the control device being configured to control the adaptive composite damping device to generate a reset deformation based on detected structural deformation information;

[0012] A power supply device is connected to the sensing device, the control device, and the adaptive composite damping device.

[0013] The integrated utility tunnel suitable for island and reef environments according to the embodiments of this application has at least the following beneficial effects:

[0014] This application discloses an integrated utility tunnel suitable for island and reef environments, comprising an inner tunnel, an outer tunnel, a MICP (Microbiologically Induced Polymer) impermeable body, sensing devices, control devices, power supply devices, and several adaptive composite damping devices. The outer and inner tunnels are coaxially arranged, with a vacuum cavity formed between them. Several adaptive composite damping devices are installed within this vacuum cavity. The vacuum cavity effectively reduces the impact of external seawater, moisture, and corrosive environments on the inner tunnel, provides ample space for the internal adaptive composite damping devices to adapt to deformation, and utilizes atmospheric pressure between the inner and outer sides of the inner and outer tunnels to compact them, thereby enhancing the sealing effect. The MICP impermeable body surrounds the outer tunnel and contacts the surrounding island and reef soil. Through microbial-induced calcium carbonate deposition, calcium ions from the external environment are converted into calcium carbonate deposits, forming a dense structural layer on the outside of the outer tunnel. This reinforces the surrounding foundation and improves the impermeability and foundation stability of the integrated utility tunnel. Each adaptive composite damping device array is housed within a vacuum chamber. One end of each device is connected to the outer side of the inner pipe gallery, and the other end to the inner side of the outer pipe gallery, thus forming a connecting support structure between the inner and outer pipe galleries. When the external environment causes load changes, the adaptive composite damping devices provide buffering and support between the two pipe galleries. A sensing device is used to detect the structural deformation of the integrated pipe gallery under external environmental conditions in real time. Connected to the control device, the sensing device transmits the detected structural deformation information to the control device. The control device receives the structural deformation information from the sensing device and, based on this information, controls the adaptive composite damping devices to generate corresponding reset deformations, thereby adjusting the structural deformation of the integrated pipe gallery and gradually restoring the inner and outer pipe galleries to their original structural state. A power supply device is connected to the sensing device, control device, and adaptive composite damping devices to provide the necessary electrical energy for their operation.

[0015] According to some embodiments of this application, the adaptive composite damping device includes a housing and a reset assembly disposed within the housing. The housing includes a first flange, a second flange, and a sleeve. The first flange is connected to the inner tube gallery, the second flange is connected to the outer tube gallery, and the sleeve is disposed between the first flange and the second flange. The reset assembly includes an SMA spring assembly and a heating assembly. The two ends of the SMA spring assembly are respectively connected to the first flange and the second flange. The heating assembly is respectively connected to the SMA spring assembly and the control device. The control device is configured to control the heating parameters of the heating assembly based on detected structural deformation information to heat-trigger shape memory reset of the SMA spring assembly.

[0016] According to some embodiments of this application, the adaptive composite damping device further includes a buffer assembly, which includes a first buffer component and a second buffer component. The first buffer component is disposed between the first flange and a first end of the SMA spring assembly, and the second buffer component is disposed between the second flange and a second end of the SMA spring assembly.

[0017] According to some embodiments of this application, the adaptive composite damping device further includes an MR damping component and a magnetic field generating component. The MR damping component is disposed between the second end of the SMA spring assembly and the second buffer component and is located within the magnetic field generated by the magnetic field generating component. The magnetic field generating component is connected to the control device, which is configured to control the strength of the magnetic field based on detected structural deformation information to adjust the damping force generated by the MR damping component.

[0018] According to some embodiments of this application, the SMA spring assembly includes a first SMA spring, a second SMA spring, and a first connector. One end of the first SMA spring is connected to the first flange, and the other end of the first SMA spring is connected to one end of the second SMA spring through the first connector. The other end of the second SMA spring is connected to the second flange, and the heating component is disposed on the first connector.

[0019] According to some embodiments of this application, the adaptive composite damping device further includes an anti-deflection component disposed between the first flange and the SMA spring assembly. The anti-deflection component includes a second connector, a ball socket, and a ball head that mates with the ball socket. The ball socket is disposed on the first flange, and the ball head is disposed at the first end of the SMA spring assembly via the second connector.

[0020] According to some embodiments of this application, the MICP impermeable body includes an adhesive layer, an interlocking layer, a reinforcing layer, an isolation layer, and an anchoring layer connected in sequence. The outer side of the outer pipe gallery is provided with a plurality of protruding teeth, and a tooth groove is formed between adjacent protruding teeth. The adhesive layer covers the outer side of the outer pipe gallery, and the interlocking layer covers the adhesive layer and at least part of the interlocking layer fills the tooth groove.

[0021] According to some embodiments of this application, the adhesive layer is made of a first MICP slurry, wherein the bacterial OD600 value of the first MICP slurry is 1.0-1.2, and the calcium source concentration is 0.5-0.8 mol / L; and / or

[0022] The material used to fabricate the interlocking layer includes a second MICP slurry containing Bacillus pasteurellii and a calcium source, wherein the bacterial solution has an OD600 value of 0.8-1.0 and the calcium source concentration is 0.3-0.5 mol / L; and / or

[0023] The reinforcing layer is made of a third MICP slurry, which contains Bacillus pasteurellii and a calcium source, with an OD600 value of 0.6-0.8, a calcium source concentration of 0.2-0.4 mol / L, and a viscosity ≤50 mPa·s; and / or

[0024] The insulating layer is made of a flexible impermeable material; and / or

[0025] The anchoring layer is made of a fourth MICP slurry, which contains Bacillus pasteurellii and a calcium source, with an OD600 value of 1.2-1.5 and a calcium source concentration of 0.8-1.0 mol / L.

[0026] According to some embodiments of this application, the power supply device includes a thermoelectric power generation component configured to convert the temperature difference between the inside and outside of the pipe gallery into electrical energy.

[0027] According to some embodiments of this application, a water-absorbing assembly is also included, which is arranged along the inner periphery of the outer tube gallery. Attached Figure Description

[0028] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0029] Figure 1 This is a schematic cross-sectional view of an integrated utility tunnel suitable for island and reef environments according to one embodiment of this application.

[0030] Figure 2 This is a schematic diagram of the longitudinal section structure of an integrated utility tunnel suitable for island and reef environments according to one embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the structure of an adaptive composite damping device according to an embodiment of this application;

[0032] Figure 4 for Figure 3 A perspective structural diagram from another angle;

[0033] Figure 5 This is a schematic diagram of the structure in which the outer pipe gallery and the MICP seepage barrier are combined according to an embodiment of this application.

[0034] Figure 6 This is a flowchart illustrating the energy conversion process of an integrated utility tunnel suitable for island and reef environments, according to one embodiment of this application.

[0035] Figure 7 This is a signal transmission diagram of various sensors, control devices, and adaptive composite damping devices according to one embodiment of this application;

[0036] Figure 8 This is a schematic diagram of the structure connecting adjacent inner tube racks according to one embodiment of this application;

[0037] Figure 9 This is a schematic diagram of the structure connecting adjacent outer pipe racks according to one embodiment of this application.

[0038] Figure label:

[0039] Inner tube gallery 100; vacuum chamber 110; channel 120; first rubber joint 130;

[0040] Outer tube gallery 200; protruding tooth 210; toothed groove 220; second rubber joint 230; limiting groove 240;

[0041] MICP impermeable body 300; bonding layer 310; interlocking layer 320; reinforcement layer 330; isolation layer 340; anchoring layer 350;

[0042] Adaptive composite damping device 400;

[0043] 500 outer casing; 510 first flange; 520 second flange; 530 sleeve;

[0044] Reset assembly 600; SMA spring assembly 610; first SMA spring 611; second SMA spring 612; first connector 613; heating assembly 620; buffer assembly 630; first buffer component 631; second buffer component 632; anti-deflection assembly 640; second connector 641; ball socket 642; ball head 643;

[0045] MR damping component 700;

[0046] Water absorption assembly 800; Piping 810; Water storage tank 820; Sedimentation tank 830;

[0047] Coral sand foundation 1000. Detailed Implementation

[0048] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0049] In the description of this application, it should be understood that the use of terms such as "center," "middle," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings and is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0051] The following reference Figures 1 to 9 This application describes an integrated utility tunnel suitable for island and reef environments.

[0052] according to Figure 1 and Figure 2 As shown, an embodiment of this application of an integrated utility tunnel suitable for island and reef environments includes an inner utility tunnel 100, an outer utility tunnel 200, a MICP impermeable body 300, a sensing device (not shown), a control device (not shown), a power supply device (not shown), and several adaptive composite damping devices 400.

[0053] The inner pipe gallery 100 is used to carry core pipelines such as power, communication, and water supply and drainage. It is understood that the inner pipe gallery 100 has internal channels 120 for accommodating these pipelines. The outer pipe gallery 200 is arranged around the outer side of the inner pipe gallery 100 and is coaxially arranged with it, forming an annular gap that constitutes a vacuum cavity 110. The vacuum cavity 110 is continuously arranged along the axial direction of the integrated pipe gallery, creating an isolation structure between the inner pipe gallery 100 and the outer pipe gallery 200.

[0054] The MICP impermeable body 300 is installed around the outer layer of the pipe gallery 200 and is continuously installed along the axial direction of the integrated pipe gallery. The MICP impermeable body 300 is used to contact the surrounding island and reef soil. Through microbial-induced calcium carbonate deposition, calcium ions in the external environment are converted into calcium carbonate deposits, thereby forming a dense structural layer on the outside of the outer layer of the pipe gallery 200. This structural layer can fill the pores in the island and reef soil and reinforce the surrounding foundation, thereby improving the impermeability and foundation stability of the integrated pipe gallery.

[0055] A plurality of adaptive composite damping devices 400 are arrayed within the vacuum cavity 110; it can be understood that the adaptive composite damping devices 400 are arranged at intervals along the circumference and axial direction of the vacuum cavity 110. One end of each adaptive composite damping device 400 is fixedly connected to the outer side wall of the inner tube gallery 100, and the other end is fixedly connected to the inner side wall of the outer tube gallery 200, thereby forming a connecting support structure between the inner tube gallery 100 and the outer tube gallery 200. When the external environment causes load changes, the adaptive composite damping device 400 can provide buffering and support between the two tube galleries.

[0056] The sensing device is used to detect in real time the structural deformation of the integrated utility tunnel under the influence of the external environment. This structural deformation can include displacement changes, strain changes, structural offsets, etc. The sensing device is electrically connected to the control device, which controls the adaptive composite damping device 400 to generate a reset deformation based on the detected structural deformation information. The power supply device is connected to the sensing device, control device, and adaptive composite damping device 400 respectively, providing the electrical energy required for the operation of these devices. This ensures the continuous operation of structural monitoring, signal processing, and adaptive adjustment processes.

[0057] During the actual operation of the integrated utility tunnel, when the island and reef environment is affected by external factors such as wave impact, foundation settlement, or temperature changes, the structure of the integrated utility tunnel may undergo a certain degree of deformation. At this time, the sensing device first monitors the deformation of the integrated utility tunnel in real time and transmits the monitored structural deformation information to the control device. The control device receives the structural deformation information transmitted by the sensing device and determines the degree of deformation of the integrated utility tunnel based on this information, generating a corresponding control signal. The control device transmits this control signal to the adaptive composite damping device 400, causing the adaptive composite damping device 400 to generate a corresponding reset deformation between the inner tunnel 100 and the outer tunnel 200, thereby adjusting the structural deformation of the integrated utility tunnel and gradually restoring the inner tunnel 100 and the outer tunnel 200 to their original structural state. At the same time, structural deformation may cause cracks. The MICP seepage barrier 300 set outside the outer pipe gallery 200 can fill the cracks and reinforce the foundation of the surrounding islands and reefs through a continuous microbial-induced calcium carbonate deposition process, so as to form a stable seepage barrier layer around the integrated pipe gallery, thereby reducing the impact of seawater infiltration and foundation loosening on the stability of the integrated pipe gallery.

[0058] This application applies to an integrated utility tunnel suitable for island and reef environments. Firstly, it establishes an isolation and protection structure through a double-layered tunnel structure, with a vacuum cavity 110 formed between the two layers. The vacuum cavity 110 effectively reduces the impact of external seawater, moisture, and corrosive environments on the inner tunnel 100, while providing ample deformation adaptation space for the internal adaptive composite damping device 400. Furthermore, it utilizes the atmospheric pressure between the inner and outer sides of the inner tunnel 100 and the outer tunnel 200 to compress them towards each other, thereby enhancing the sealing effect. Secondly, several adaptive composite damping devices 400 installed in the vacuum cavity 110 achieve adaptive multi-directional adjustment of structural deformation. Simultaneously, the MICP impermeable body 300 reinforces the island and reef foundation for seepage prevention. Combined with sensing, control, and power supply devices, a structural monitoring and adaptive adjustment system is formed, thereby improving the structural stability, seepage prevention performance, and long-term operational reliability of the integrated utility tunnel in complex island and reef environments.

[0059] In some embodiments, see Figure 7 The control device includes a communication unit. The control device can compare the received detection information with a preset warning threshold and determine whether a warning is triggered. When the warning conditions are met, the communication unit is activated to send a warning signal to the remote operation and maintenance platform, and simultaneously triggers corresponding protection and reset measures. The communication unit can be configured as a wired or wireless communication unit.

[0060] In some embodiments, the vacuum chamber 110 is sealed using a stepped vacuuming process, which effectively ensures the safe operation of the integrated utility tunnel and extends its service life. The stepped vacuuming process includes first evacuating from an initial pressure of 0.1 MPa to 0.02 MPa and holding the pressure for 1 hour, then evacuating to 0.005 MPa and holding the pressure for 24 hours.

[0061] In some embodiments, the integrated utility tunnel also includes several vacuum sensors (not shown). The vacuum chamber 110 is connected to an external vacuum pumping device. Each vacuum sensor can be arranged circumferentially and axially within the vacuum chamber 110 to detect the vacuum level at various locations within the chamber. Each vacuum sensor and the vacuum pumping device are connected to a control device. When a sensor detects a vacuum level fluctuation exceeding a preset range, the control device automatically initiates pressure replenishment using the vacuum pumping device and sends a warning signal to ensure long-term stability of the vacuum sealing performance. The vacuum sensors can be replaced with pressure sensors, and the control device converts the pressure value into a vacuum level through mathematical calculation.

[0062] In some embodiments, see Figure 1 and Figure 2 The inner wall of the outer tube gallery 200 is provided with several limiting grooves 240. The limiting grooves 240 are corresponding to the adaptive composite damping devices 400. The adaptive composite damping devices 400 are partially set in the limiting grooves 240, which can limit the radial displacement range of the adaptive composite damping devices 400 and avoid excessive deformation and damage.

[0063] In some embodiments, see [link to relevant documentation]. Figure 7 The sensing devices include tilt sensors, strain sensors, displacement sensors, and other sensors.

[0064] according to Figures 1 to 4 As shown, in one embodiment of this application, the adaptive composite damping device 400 includes a housing 500 and a reset component 600. The reset component 600 is installed inside the housing 500, and the housing 500 is used to protect the internal reset component 600.

[0065] For details, please refer to Figure 3 and Figure 4The outer casing 500 includes a first flange 510, a second flange 520, and a sleeve 530. The first flange 510 is fixedly connected to the outer wall of the inner tube gallery 100, the second flange 520 is fixedly connected to the inner wall of the outer tube gallery 200, and both ends of the sleeve 530 are fixedly connected to the first flange 510 and the second flange 520, forming an integral structure. The sleeve 530 has a sealed installation space inside for accommodating the reset assembly 600. The reset assembly 600 includes an SMA spring assembly 610 and a heating assembly 620. Both ends of the SMA spring assembly 610 are fixedly connected to the first flange 510 and the second flange 520, respectively. When a relative displacement occurs between the inner tube gallery 100 and the outer tube gallery 200, the displacement can be transmitted to both ends of the SMA spring assembly 610 through the first flange 510 and the second flange 520, thereby causing the SMA spring assembly 610 to undergo corresponding elastic deformation. The heating component 620 is connected to the SMA spring assembly 610 and electrically connected to the control device. The control device controls the heating parameters of the heating component 620 according to the detected structural deformation information. The heating component 620 heats the SMA spring assembly 610, causing the SMA spring assembly 610 to reach the phase transition temperature of the shape memory alloy, thereby triggering shape memory reset. The SMA spring assembly 610 returns to its original shape, thereby adjusting the relative displacement between the two tube racks.

[0066] The integrated utility tunnel of this application achieves adaptive reset of structural deformation through the SMA spring assembly 610 set inside the outer shell 500, and the shape memory effect is triggered by the heating assembly 620, so that the SMA spring assembly 610 can actively restore its original shape after deformation, thereby driving the structure between the inner tube tunnel 100 and the outer tube tunnel 200 to restore a stable state. This improves the structural recovery capability and stability of the integrated utility tunnel in the complex island and reef environment, and enables the tunnel to quickly restore its original structural state after being subjected to external loads.

[0067] In some embodiments, the SMA spring assembly 610 is made of a Ti-Ni alloy; further, the material also includes Cu, which can reduce phase transformation hysteresis and improve stability, and the atomic percentage ratio of the material is 50.8% Ti, 44.2% Ni, and 5.0% Cu; further still, the surface of the SMA spring assembly 610 is provided with a polytetrafluoroethylene anti-corrosion coating, the thickness of which is 0.1mm-0.2mm, which can improve the high temperature resistance and corrosion resistance of the SMA spring assembly 610 and increase its service life.

[0068] In some embodiments, participate Figure 7The integrated utility tunnel also includes a temperature sensor to detect the ambient temperature, with a measurement range of -20℃ to 150℃. The phase change trigger temperature of the SMA spring assembly 610 is 40℃-60℃. The control device coordinates the control of the SMA spring assembly 610 based on the temperature information collected by the temperature sensor and the structural deformation information. Specifically, the control device only activates the SMA spring assembly 610 to trigger its shape memory effect for reset when the deformation of the integrated utility tunnel exceeds a preset threshold (e.g., 5mm) and the ambient temperature is below the phase change trigger upper limit (60℃). The coordinated setting of the temperature information collected by the temperature sensor and the structural deformation information avoids the false triggering of the SMA spring assembly 610 under non-structural temperature rise caused only by an increase in ambient temperature (e.g., ≤50℃), thereby preventing unnecessary energy consumption and structural malfunction. At the same time, in low or medium temperature environments, the SMA spring assembly 610 can still be reliably triggered to achieve reset when actual structural deformation occurs. This achieves dual constraints on the triggering conditions of the SMA spring assembly 610, enabling the SMA spring assembly 610 to respond only under actual structural deformation conditions, thereby improving the accuracy and reliability of adaptive reset and enhancing the stable operation capability of the integrated utility tunnel in complex environments.

[0069] Island and reef areas are subjected to a highly corrosive environment characterized by high salt spray, seawater immersion, and alternating wet and dry conditions. The corrosion rate of metal components (such as damping elements and fastening elements) within the pipe gallery is 3-5 times that of terrestrial environments. Conventional anti-corrosion measures (such as galvanizing and anti-corrosion coatings) have a service life of only 1 / 3 to 1 / 2 of the pipe gallery's design life (typically 50 years), requiring frequent major overhauls and replacements, resulting in extremely high maintenance costs. Therefore, in some embodiments, the sleeve 530 is made of ceramic matrix composite material, possessing excellent corrosion resistance and electromagnetic penetration. Furthermore, the inner wall of the sleeve 530 is provided with multiple sealing grooves for installing static and dynamic seals, forming a fully enclosed anti-corrosion space. In addition, the installation space inside the outer shell 500 is filled with inert gas to completely isolate it from external corrosive media.

[0070] according to Figure 3 and Figure 4As shown, in one embodiment of this application, the adaptive composite damping device 400 further includes a buffer assembly 630, which includes a first buffer component 631 and a second buffer component 632. The first buffer component 631 is disposed between the first flange 510 and the first end of the SMA spring assembly 610, and the second buffer component 632 is disposed between the second flange 520 and the second end of the SMA spring assembly 610, so that both ends of the SMA spring assembly 610 are connected to the first flange 510 and the second flange 520 through corresponding buffer components. This enables the outer pipe gallery 200 to buffer and absorb impact loads when subjected to force, thereby avoiding damage to the SMA spring assembly 610 caused by sudden deformation impacts, and giving the integrated pipe gallery better structural stability and reliability when operating under complex island and reef environmental conditions.

[0071] In some embodiments, the cushioning component 630 is made of rubber.

[0072] according to Figure 3 and Figure 4 As shown, in one embodiment of this application, the adaptive composite damping device 400 further includes an MR damping component 700 and a magnetic field generating component (not shown). The MR damping component 700 provides adjustable damping when the SMA spring assembly 610 deforms. The MR damping component 700 is disposed between the second end of the SMA spring assembly 610 and the second buffer member 632, and is located within the magnetic field range generated by the magnetic field generating component. The magnetic field generating component is electrically connected to a control device, which can control the magnetic field generating component based on the detected structural deformation information to generate magnetic fields of different intensities, thereby adjusting the damping force generated by the MR damping component 700.

[0073] When the structural deformation of the utility tunnel is small, the control device controls the magnetic field generating component to produce a weak magnetic field, causing the MR damping component 700 to generate a small damping force, thus avoiding excessive damping from affecting the normal reset process of the structure. When the structural deformation is significant, the control device controls the magnetic field generating component to produce a strong magnetic field, causing the MR damping component 700 to generate a larger damping force, thereby suppressing the structural deformation; when the structural deformation exceeds 80% of the preset maximum deformation of the utility tunnel, the control device sends an early warning signal.

[0074] It is understandable that the MR damping component 700 is a magnetorheological damping component that uses magnetorheological fluid as the working medium. By adjusting the magnetic field strength, the internal magnetorheological fluid medium can change its flow characteristics under the action of the magnetic field, thereby achieving stepless adjustment of the damping force. This allows the adaptive composite damping device 400 to automatically adjust the damping force according to the actual working conditions during structural vibration and deformation, so that the integrated utility tunnel can effectively absorb vibration energy when it is disturbed by the external environment, reduce the amplitude of structural vibration, and improve the overall stability and vibration resistance of the integrated utility tunnel.

[0075] In some embodiments, when the structural deformation of the utility tunnel is less than the preset deformation, the reset adjustment is completed solely by the SMA spring assembly 610; when the structural deformation of the utility tunnel is greater than the preset deformation, the SMA spring assembly 610 and the MR damping assembly 700 jointly complete the reset adjustment, and as the structural deformation of the utility tunnel gradually increases, the magnetic field strength gradually increases to enhance the damping effect of the MR assembly. The preset deformation can be set according to specific working conditions and environment.

[0076] In some embodiments, the magnetorheological fluid is a silicone oil-based magnetorheological fluid (viscosity 200-500 mPa·s, 25°C), with an adjustment range of 5-50 kN.

[0077] In some embodiments, the magnetic field generating component may be positioned around or near the MR damping component 700.

[0078] according to Figure 3 and Figure 4 As shown, in one embodiment of this application, the SMA spring assembly 610 includes a first SMA spring 611, a second SMA spring 612, and a first connector 613. One end of the first SMA spring 611 is fixedly connected to the first flange 510, the other end of the first SMA spring 611 is fixedly connected to one end of the first connector 613, the other end of the first connector 613 is fixedly connected to one end of the second SMA spring 612, and the other end of the second SMA spring 612 is fixedly connected to the second flange 520, so that the SMA spring assembly 610 forms an elastic connection structure composed of two SMA springs connected in series between the first flange 510 and the second flange 520. Meanwhile, the heating component 620 is mounted on the first connector 613 and connected to the control device, which can simultaneously heat the first SMA spring 611 and the second SMA spring 612, so that the two SMA springs can trigger the shape memory effect synchronously when heated, and the shape memory effect can be triggered quickly, so that the SMA spring assembly 610 can generate a restoring force in time, driving the integrated utility tunnel structure to return to its original state, thereby improving the structural recovery capability and stability of the integrated utility tunnel in complex environments.

[0079] In some embodiments, the stiffness coefficient of the first SMA spring 611 differs from that of the second SMA spring 612, thereby enabling the SMA spring assembly 610 to achieve a graded stiffness design. This provides a first stiffness at the initial stage of the compression stroke and a second stiffness greater than the first stiffness in the later stage of the compression stroke, achieving progressive buffering under impact loads while balancing reset sensitivity and load-bearing capacity. In other embodiments, the SMA spring assembly 610 can also be configured as a variable pitch spring or a variable diameter spring. The graded stiffness coefficient is 20-50 N / mm.

[0080] In some embodiments, the outer side of the SMA spring assembly 610 is provided with a guide sleeve to ensure that the SMA spring assembly 610 is displaced only axially.

[0081] In some embodiments, the MR damping component 700 may be disposed between the second SMA spring 612 and the second buffer component 632.

[0082] In some embodiments, the SMA spring assembly 610 may be replaced with a disc spring.

[0083] In some embodiments, the first buffer member 631 is specifically disposed between the first SMA spring 611 and the first flange 510, and the second buffer member 632 is specifically disposed between the second SMA spring 612 and the second flange 520.

[0084] according to Figure 3 and Figure 4 As shown, in one embodiment of this application, the adaptive composite damping device 400 further includes an anti-deflection component 640. The anti-deflection component 640 is disposed between the first flange 510 and the first end of the SMA spring assembly 610 to prevent the SMA spring assembly 610 from deflecting or bending laterally under force, thus preventing damage. The anti-deflection component 640 includes a second connector 641, a ball socket 642, and a ball head 643. The ball socket 642 is disposed on the first flange 510, and the ball head 643 is disposed at the first end of the SMA spring assembly 610 through the second connector 641. The ball head 643 and the ball socket 642 are ball-jointed, forming a connection structure with a certain degree of rotational freedom between the SMA spring assembly 610 and the first flange 510.

[0085] When the integrated utility tunnel structure deforms, a certain angle of relative displacement may occur between the inner tunnel 100 and the outer tunnel 200, at which time the force direction of the SMA spring assembly 610 may change. By setting the ball head 643 and the socket 642, the first end of the SMA spring assembly 610 can rotate within a certain range within the socket 642, allowing the SMA spring assembly 610 to automatically adjust its force direction. This prevents excessive lateral bending or deflection of the SMA spring assembly 610 during the stress process, ensuring that the SMA spring assembly 610 remains in a relatively reasonable stress state, improving the overall stability of the adaptive composite damping device 400, and further enhancing the stability and reliability of the integrated utility tunnel structure.

[0086] The integrated utility tunnel of this application, through the multi-directional deflection of the adaptive composite damping device 400 and the self-resetting function of the SMA spring, combined with the compaction and sealing effect of the vacuum chamber 110, accurately adapts to the multi-directional uneven settlement of the coral sand foundation 1000, avoids the generation of sealing gaps, and greatly improves the deformation adaptability.

[0087] In some embodiments, the ball joint structure consisting of the ball head 643 and the ball socket 642 can be replaced by a universal joint.

[0088] In some embodiments, the ball joint structure consisting of the ball head 643 and the ball socket 642 is specifically disposed between the first flange 510 and the first SMA spring 611.

[0089] In some embodiments, a ball head 643 is disposed on the first flange 510, and a ball socket 642 is disposed at the first end of the SMA spring assembly 610 via a second connector 641. The ball head 643 and the ball socket 642 are configured to be ball-jointed, thereby forming a connection structure with a certain degree of rotational freedom between the SMA spring assembly 610 and the first flange 510.

[0090] according to Figure 5 As shown, in one embodiment of this application, the MICP seepage barrier 300 is a gradient seepage barrier, comprising an adhesive layer 310, an interlocking layer 320, a reinforcing layer 330, an isolation layer 340, and an anchoring layer 350 connected in sequence.

[0091] Specifically, the outer pipe gallery 200 is made of corrosion-resistant concrete, and its outer side wall is provided with several protruding teeth 210. Adjacent protruding teeth 210 form a tooth groove 220. The protruding teeth 210 and the tooth groove 220 form a ring gear-like structure. The surface of the gear-like structure is roughened to enhance the bonding performance of the subsequent MICP seepage barrier 300.

[0092] The bonding layer 310 covers the gear-shaped structure surface on the outer side of the outer tube gallery 200, and covers the areas of the protrusions 210 and the grooves 220. The bonding layer 310 is made of a high-concentration first MICP slurry, wherein the bacterial solution OD600 value of the first MICP slurry is 1.0-1.2, and the calcium source concentration is 0.5-0.8 mol / L; the grouting pressure is controlled at 0.2-0.3 MPa, and curing is performed for 7-10 days after grouting. After curing, a dense bonding layer 310 with a thickness of 2-3 mm is formed, and its permeability coefficient is ≤1×10⁻⁶. -8 cm / s. The dense bonding layer 310 is closely attached to the entire surface of the protrusion 210 and the groove 220. On the one hand, it forms a chemical bond with the concrete of the outer pipe gallery 200 through microbial mineralization (bond strength ≥1.5MPa). On the other hand, it seals the gaps on the tooth surface and the grouting holes, thereby forming a continuous sealing interface in the structure, constructing the first seepage prevention and bonding barrier, and realizing the surface sealing and bonding functions.

[0093] The interlocking layer 320 covers the bonding layer 310, and at least part of the interlocking layer 320 fills the tooth groove 220, enabling the interlocking layer 320 to form a mechanical interlocking relationship with the protruding tooth 210 structure on the surface of the outer pipe gallery 200, thereby enhancing the bonding stability between the MIP geomembrane 300 and the outer pipe gallery 200. The interlocking layer 320 is made of a medium-concentration second MIP grout, wherein the second MIP grout contains Bacillus pasteurellii and a calcium source, and the OD600 value of the bacterial solution is 0.8-1.0, and the calcium source concentration is 0.3-0.5 mol / L; the grouting pressure is controlled at 0.15-0.25 MPa, and after grouting, it is cured for 5-7 days, and after curing, a mineralized interlocking layer 320 with a thickness of 5-8 mm is formed, and its compressive strength is ≥3 MPa. After the second MICP grout is injected, it fills the entire space between the protrusion 210 and the groove 220, and after solidification, it forms a mineralized interlocking body that matches the gear structure, achieving mechanical locking. On the other hand, the grout overflows from the injection hole to the outside of the groove 220 and forms discrete mineralized anchor points, strengthening the connection with the outer reinforcement layer 330. The bonding layer 310 and the interlocking layer 320 provide double protection for the anchoring reliability of the seepage barrier and the outer pipe gallery 200, completely solving the problem of easy peeling of the seepage barrier in the prior art, and significantly enhancing the anchoring stability between the seepage barrier and the outer pipe gallery 200.

[0094] The reinforcement layer 330 covers the interlocking layer 320 and extends into the coral sand foundation 1000, forming a reinforcement zone with a depth of not less than 1.5m to further improve the overall strength of the surrounding foundation structure. The reinforcement layer 330 is made of a low-viscosity, highly active third MICP grout containing Bacillus pasteurellii and a calcium source. The bacterial solution has an OD600 value of 0.6-0.8, a calcium source concentration of 0.2-0.4 mol / L, and a viscosity ≤50 mPa·s. The grouting pressure is controlled at 0.1-0.2 MPa, and a segmented grouting method is used (each segment is 1-2m long). After curing for 10-14 days, the deep foundation reinforcement layer 330 is formed, with a permeability coefficient ≤1×10⁻⁶. -7 cm / s, increasing the bearing capacity of the foundation by 30%-50%. The third MICP grout fully reacts and solidifies in the coral sand foundation 1000 soil and rock mass, filling the pores of the sand (coral sand porosity is 30%-40%), thus forming a strong integral reinforcement layer 330 structure. The reinforcement layer 330 not only provides a stable bottom bearing foundation for the inner mechanical interlocking layer 320, but also realizes the seepage prevention and reinforcement functions of the foundation itself, reducing the risk of uneven settlement of the foundation and realizing the deep foundation reinforcement and seepage prevention functions.

[0095] An isolation layer 340 covers the reinforcement layer 330, and the isolation layer 340 is made of a flexible impermeable material. The isolation layer 340 acts as a buffer transition and simultaneously prevents trace amounts of moisture from seeping inward. In some embodiments, a moisture permeation sensor (operating current ≤10μA, measurement range 0-100%RH, accuracy ±2%RH) is installed inside the isolation layer 340. The moisture permeation sensor is electrically connected to a control device for real-time monitoring of the seepage prevention status, thereby providing signal support for leakage early warning. When the relative humidity (RH) ≥ 85%, the control device sends an early warning signal, indicating abnormal water seepage inside the integrated utility tunnel.

[0096] Anchor layer 350 covers the isolation layer 340 and is located on the outermost side of MICP impermeable body 300. The anchor layer 350 is made of a high-concentration fourth MICP grout containing Bacillus pasteurellii and a calcium source, with an OD600 value of 1.2-1.5 and a calcium source concentration of 0.8-1.0 mol / L. The grouting pressure is controlled at 0.3-0.4 MPa. After curing for 14-21 days, a high-strength, low-permeability, and dense anchor layer 350 is formed, with a compressive strength ≥5 MPa and a permeability coefficient ≤1×10⁻⁶. -9 The flow rate is cm / s, and the thickness is 30-50cm. The anchoring layer 350 seals the seepage channels at the bottom of the grout reinforcement layer 330, forming a bottom seepage barrier boundary. On the other hand, it forms a high-strength bond with the surrounding coral sand foundation 1000 (bond strength ≥2.0MPa), thereby further enhancing the overall anchoring capacity between the outer pipe gallery 200, the gradient MICP seepage barrier 300 and the foundation, and enabling it to form an anchoring connection with the surrounding island and reef soil.

[0097] The gradient MICP seepage barrier 300 of this application forms a double closed boundary through the cooperation of the surface dense bonding layer 310 and the high-concentration MICP anchoring layer 350. The intermediate functional layers reduce the seepage channels step by step, forming a continuous and stable seepage prevention path. At the same time, it achieves a firm bond between the seepage barrier and the main body of the pipe gallery and the coral sand foundation 1000, and prevents the seepage barrier from peeling off and leaking.

[0098] In some embodiments, multiple layers of annular anchoring microtubes are uniformly pre-embedded circumferentially in the gaps between the gear teeth 210. Grouting holes are uniformly arranged on the microtubes, and the grouting holes are positioned directly opposite the tooth groove 220 area. The two ends of the anchoring microtubes extend to the ends of the outer pipe gallery 200 and form grouting interfaces, realizing the pre-setting of the grouting path. This reduces the difficulty of on-site construction and ensures the uniformity and accuracy of layered grouting, providing a foundation for the subsequent grouting of the gradient MIP cutoff body 300.

[0099] Island and reef areas generally suffer from limited space, inconvenient material transportation, and unstable power supply. Existing utility tunnels rely on external power supply, making them unsuitable for unattended operation and maintenance, resulting in high costs and operational difficulties. Furthermore, in the island and reef environment, external air temperature, seawater temperature, and the heat generated by the equipment inside the tunnel vary, typically resulting in a temperature difference of 5-15℃ between the inside and outside of the tunnel. Therefore, according to... Figure 6 As shown, in one embodiment of this application, the power supply device includes a thermoelectric power generation component (not shown), which is configured to convert the temperature difference between the inside and outside of the pipe gallery into electrical energy.

[0100] Specifically, the thermoelectric power generation unit is installed in the temperature difference zone between the inside and outside of the integrated utility tunnel structure, enabling it to exchange heat with both the internal and external environments simultaneously. One side of the thermoelectric power generation unit is in thermal contact with the internal space of the utility tunnel, while the other side is in thermal contact with the external environment, thus creating a temperature difference between the two sides of the unit. The output end of the thermoelectric power generation unit is electrically connected to the electrical equipment in the integrated utility tunnel to transmit the generated electrical energy to the equipment.

[0101] This application's integrated utility tunnel can utilize the natural temperature difference between the tunnel's interior and exterior environments as an energy source, enabling the thermoelectric power generation components to continuously generate electricity, thereby providing stable power support for the equipment within the integrated utility tunnel. It can supply power to the equipment inside the integrated utility tunnel without the need for additional external power supply, improving the integrated utility tunnel's energy self-sufficiency and operational reliability in island and reef environments, and is suitable for unattended extreme application environments on islands and reefs.

[0102] In some embodiments, the thermoelectric power generation component is made of a flexible polyimide substrate and a Bi2Te3-based thermoelectric material (thermoelectric figure of merit ZT≥1.0, 300K), possessing good thermoelectric conversion performance and the characteristics of being flexible and attachable, and continuously generating electrical energy through the Seebeck effect (output voltage 3.3-5V, output power 10-50mW).

[0103] In some embodiments, the power supply device further includes an energy storage element connected to the output terminal of the thermoelectric power generation component. The energy storage element can be configured as a micro supercapacitor (capacity 100-500F, operating voltage 2.7V), lithium battery, or other energy storage device for storing electrical energy.

[0104] In some other embodiments, the power supply device also includes a wind power generation component, or the thermoelectric power generation component can be directly replaced with a wind power generation component, which is suitable for island and reef areas with abundant wind resources; however, compared with the wind power generation component, the thermoelectric power generation component has better power generation stability and is not affected by wind conditions.

[0105] according to Figure 1 and Figure 2As shown, in one embodiment of this application, the integrated utility tunnel further includes a water-absorbing component 800, which is arranged along the inner periphery of the outer utility tunnel 200 to form a ring-shaped or segmented water-absorbing structure. When moisture or dampness seeps into the inner side of the outer utility tunnel 200, the water-absorbing component 800 located on the inner periphery of the outer utility tunnel 200 can absorb the moisture, allowing it to be adsorbed and stored inside the water-absorbing component 800. This reduces the retention of moisture in the utility tunnel structure, mitigates the adverse effects of a humid environment on the utility tunnel structure and related equipment, and thereby improves the operational stability and service life of the integrated utility tunnel structure.

[0106] In some embodiments, the water-absorbing component 800 is configured as a capillary adsorption water-guiding structure. The capillary adsorption water-guiding structure is made of hydrophilic fibers and actively adsorbs trace amounts of water that penetrate through the capillary action. Simultaneously, the water-absorbing component 800 is equipped with a filter screen.

[0107] In some embodiments, the integrated utility tunnel also includes a water storage tank 820, which is connected to a water absorption assembly 800 via a pipe 810, enabling the collection and reuse of water.

[0108] In some embodiments, a graded sedimentation tank 830 is provided between the water storage tank 820 and the water absorption assembly 800 to trap impurities in the water, facilitating later maintenance and cleaning. In some embodiments, a level sensor (operating current ≤20μA, measurement range 0-100mm, accuracy ±1mm) is installed in the graded sedimentation tank 830 to detect changes in the water level in the graded sedimentation tank 830 in real time. The level sensor is connected to a control device, and when the water level is ≥50mm, the control device sends an early warning signal, indicating abnormal water seepage inside the integrated utility tunnel.

[0109] In some embodiments, a reverse osmosis desalination component and an ultraviolet disinfection component are provided between the graded sedimentation tank 830 and the water storage tank 820 to convert the collected water into fresh water, which can be used for system cooling or emergency water use, thereby improving resource utilization.

[0110] In some embodiments, see Figure 8 and Figure 9 The inner pipe racks 100 are connected by a first rubber interface 130, and the outer pipe racks 200 are connected by a second rubber interface 230.

[0111] This application presents a comprehensive utility tunnel applicable to island and reef environments. This tunnel is based on SMA-MR damping and MICP seepage prevention, enabling energy recycling and adaptive resetting. It is suitable for the unique environments of islands and reefs characterized by coral sand foundations (1000m), high salt spray, alternating tides, and frequent uneven foundation settlement. The integrated utility tunnel of this application firstly sets the inner tunnel 100 and outer tunnel 200 as a double-layer coaxial structure, forming a vacuum cavity 110 between them. This creates an isolation structure between the inner tunnel 100 and the external environment, thereby reducing the impact of external seawater, moisture, and corrosive environments on the internal pipelines. Furthermore, the integrated utility tunnel of this application features an array of adaptive composite damping devices 400 within the vacuum cavity 110, forming an adaptively adjustable connection and support structure between the inner utility tunnel 100 and the outer utility tunnel 200. When the utility tunnel deforms under external loads, the deformation is detected by sensors and analyzed and controlled by a control device, causing each adaptive composite damping device 400 to undergo reset deformation. This allows for multi-directional structural displacement adjustment to restore the original state, improving the stability and deformation resistance of the utility tunnel structure. Secondly, the integrated utility tunnel of this application further enhances foundation stability and reduces the adverse effects of seawater infiltration on the utility tunnel structure by installing a MICP impermeable body 300 on the outer side of the outer utility tunnel 200 and utilizing microbial-induced calcium carbonate deposition to consolidate and prevent seepage in the surrounding island and reef foundation. Meanwhile, by setting up thermoelectric power generation components to generate electricity using the temperature difference between the inside and outside of the pipe gallery, the integrated pipe gallery can provide power to the sensing devices, control devices, and adaptive composite damping devices 400, enabling the integrated pipe gallery to achieve a certain degree of self-powered operation in the island and reef environment; and by setting up water absorption components 800 on the inner periphery of the outer pipe gallery 200, the water that may be generated inside the pipe gallery can be absorbed, thereby reducing the adverse effects of the humid environment on the structure and equipment.

[0112] In the description of this specification, the use of terms such as "an embodiment," "some examples," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" indicates that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0113] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. An integrated utility tunnel suitable for atoll environments, characterized by: include Inner pipe gallery; The outer tube gallery is coaxially arranged with the inner tube gallery and a vacuum cavity is provided between them; The MICP impermeable body is arranged outside the outer layer of the pipe gallery and is configured to reinforce the external foundation by inducing calcium carbonate deposition through microorganisms. Several adaptive composite damping devices are arranged in an array in the vacuum cavity. One end of each adaptive composite damping device is connected to the outer side of the inner tube gallery, and the other end is connected to the inner side of the outer tube gallery. A sensing device configured to detect structural deformation of the integrated utility tunnel; A control device connected to the sensing device, the control device being configured to control the adaptive composite damping device to generate a reset deformation based on detected structural deformation information; A power supply device, which is connected to the sensing device, the control device and the adaptive composite damping device respectively; The adaptive composite damping device includes a housing and a reset assembly disposed within the housing. The housing includes a first flange, a second flange, and a sleeve. The first flange is connected to the inner tube gallery, the second flange is connected to the outer tube gallery, and the sleeve is disposed between the first flange and the second flange. The reset assembly includes an SMA spring assembly and a heating assembly. The two ends of the SMA spring assembly are respectively connected to the first flange and the second flange. The heating assembly is respectively connected to the SMA spring assembly and the control device. The control device is configured to control the heating parameters of the heating assembly based on detected structural deformation information to perform heat-triggered shape memory reset of the SMA spring assembly. The adaptive composite damping device further includes a buffer assembly, which includes a first buffer component and a second buffer component. The first buffer component is disposed between the first flange and the first end of the SMA spring assembly, and the second buffer component is disposed between the second flange and the second end of the SMA spring assembly.

2. The utility tunnel suitable for atoll environment according to claim 1, characterized in that: The adaptive composite damping device further includes an MR damping component and a magnetic field generating component. The MR damping component is disposed between the second end of the SMA spring assembly and the second buffer component and is located within the magnetic field generated by the magnetic field generating component. The magnetic field generating component is connected to the control device, which is configured to control the strength of the magnetic field based on the detected structural deformation information to adjust the damping force generated by the MR damping component.

3. The utility tunnel suitable for atoll environment according to claim 2, wherein: The SMA spring assembly includes a first SMA spring, a second SMA spring, and a first connector. One end of the first SMA spring is connected to the first flange, and the other end of the first SMA spring is connected to one end of the second SMA spring through the first connector. The other end of the second SMA spring is connected to the second flange. The heating component is disposed on the first connector.

4. The integrated utility tunnel suitable for island and reef environments according to claim 2, characterized in that: The adaptive composite damping device further includes an anti-deflection component, which is disposed between the first flange and the SMA spring assembly. The anti-deflection component includes a second connector, a ball socket, and a ball head that mates with the ball socket. The ball socket is disposed on the first flange, and the ball head is disposed at the first end of the SMA spring assembly via the second connector.

5. The integrated utility tunnel suitable for island and reef environments according to claim 1, characterized in that: The MICP seepage barrier includes an adhesive layer, an interlocking layer, a reinforcing layer, an isolation layer, and an anchoring layer connected in sequence. The outer side of the outer pipe gallery is provided with a plurality of protruding teeth, and a tooth groove is formed between adjacent protruding teeth. The adhesive layer covers the outer side of the outer pipe gallery, and the interlocking layer covers the adhesive layer and at least part of the interlocking layer fills the tooth groove.

6. The integrated utility tunnel suitable for island and reef environments according to claim 5, characterized in that: The adhesive layer is made of a first MICP slurry, wherein the bacterial OD600 value of the first MICP slurry is 1.0-1.2, and the calcium source concentration is 0.5-0.8 mol / L; and / or The material used to fabricate the interlocking layer includes a second MICP slurry containing Bacillus pasteurellii and a calcium source, wherein the bacterial solution has an OD600 value of 0.8-1.0 and the calcium source concentration is 0.3-0.5 mol / L; and / or The reinforcing layer is made of a third MICP slurry, which contains Bacillus pasteurellii and a calcium source, with an OD600 value of 0.6-0.8, a calcium source concentration of 0.2-0.4 mol / L, and a viscosity ≤50 mPa·s; and / or The insulating layer is made of a flexible impermeable material; and / or The anchoring layer is made of a fourth MICP slurry, which contains Bacillus pasteurellii and a calcium source, with an OD600 value of 1.2-1.5 and a calcium source concentration of 0.8-1.0 mol / L.

7. The integrated utility tunnel suitable for island and reef environments according to claim 1, characterized in that: The power supply device includes a thermoelectric generator assembly configured to convert the temperature difference between the inside and outside of the pipe gallery into electrical energy.

8. The integrated utility tunnel suitable for island and reef environments according to claim 1, characterized in that: It also includes a water-absorbing assembly arranged along the inner periphery of the outer tube gallery.

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