Compression-resistant connecting device for lining segment circular seams

Abstract

The invention discloses a pressure-resistant connecting device for lining segment circular seams, which comprises adjacent lining segments and a self-adaptive energy consumption connecting structure arranged at the circular seams of the adjacent lining segments, the self-adaptive energy consumption connecting structure comprises energy consumption structures arranged in the adjacent lining pipe pieces and shape memory alloy energy consumption connecting plates used for connecting the adjacent energy consumption structures, and the shape memory alloy energy consumption connecting plates are arranged between the adjacent lining pipe pieces in a crossing mode. According to the pressure-resistant connecting device, the connecting function of a traditional connecting mode can be exerted, the bearing capacity and the pressure-resistant capacity of the lining segment are improved, meanwhile, the characteristics of convenient maintenance and replacement are considered, and the pressure-resistant connecting device is suitable for tunnels penetrating through movable fault zones, subway tunnels with high vibration load frequency and other scenes.

Description

Technical Field

[0001] The invention belongs to the field of tunnel structures, and in particular relates to a connecting device for lining segments. Background Art

[0002] In the traditional lining segment annular joint connection technology, bolt connection or simple rigid connection method is mostly used. However, with the continuous expansion of underground engineering construction scale and the continuous improvement of engineering demand, underground engineering has gradually expanded to areas with complex terrain and geological conditions, especially in tunnels crossing active fault zones, subway tunnels (high vibration load frequency), etc., the traditional connection technology is difficult to meet the needs of modern underground engineering construction due to complex conditions such as large deformation and high stress. When the local stratum settles, displaces or under the action of dynamic loads such as earthquakes, due to the lack of effective energy dissipation mechanism, the traditional connection method is difficult to buffer and dissipate these stresses. The rigidly connected lining segment joints are extremely vulnerable to damage, which increases the cost of maintenance and replacement, and may even cause safety accidents. At the same time, the misalignment between segments is another serious problem faced by traditional connection technology. Misalignment not only destroys the integrity of the segment structure and affects its bearing capacity, but also destroys the waterproof sealing performance between the segments, leading to groundwater leakage.

[0003] Therefore, there is an urgent need to develop a new type of structure specifically for the annular joint connection of lining segments, which can effectively solve the problem of segment damage that is prone to exist in the existing rigid connection method, reduce the misalignment between segments, improve the comprehensive performance of the lining segment structure under complex geological conditions and dynamic loads, and ensure the long-term safe and stable operation of underground projects. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings and defects mentioned in the above background technology and provide a compression-resistant connection device for the annular seam of the lining segment. The compression-resistant connection device can not only give full play to the connection function of the traditional connection method, but also improve the bearing capacity and compression resistance of the lining segment while taking into account the characteristics of easy maintenance and replacement. It is suitable for scenes such as tunnels passing through active fault zones and subway tunnels with high vibration load frequencies.

[0005] In order to solve the above technical problems, the technical solution proposed by the present invention is: A compression-resistant connection device for annular seams of lining segments comprises adjacently arranged lining segments and an adaptive energy-absorbing connection structure arranged at the annular seams of adjacent lining segments, wherein the adaptive energy-absorbing connection structure comprises energy-absorbing structures respectively arranged in adjacent lining segments and a shape memory alloy energy-absorbing connection plate for connecting adjacent energy-absorbing structures, wherein the shape memory alloy energy-absorbing connection plate is arranged across between adjacent lining segments.

[0006] In the above-mentioned pressure-resistant connecting device, preferably, the energy-absorbing structure includes an energy-absorbing piston, a displacement rod, an energy-absorbing baffle, a displacement limiting plate and a displacement buffer; the displacement rod and the energy-absorbing piston are coaxially fixed (for example, the two are coaxially welded to maintain synchronous movement), and the energy-absorbing piston is located in the middle position of the displacement rod; the displacement limiting plate is movably sleeved on both ends of the displacement rod; the energy-absorbing baffle is fixed to the side of the energy-absorbing piston, and the energy-absorbing baffle is clamped between the energy-absorbing piston and the displacement limiting plate; the displacement buffer is fixed to the outer end surface of the displacement limiting plate (for example, by welding); the displacement buffer is provided with a receiving groove for accommodating the displacement rod near the displacement limiting plate, and the end of the displacement rod is movably arranged in the receiving groove.

[0007] In the above-mentioned pressure-resistant connection device, preferably, the energy-absorbing baffle includes two pairs of symmetrically distributed friction plates, a supporting platform is provided in the middle part of the side of the energy-absorbing piston, one pair of the friction plates is arranged above the supporting platform and between the upper displacement limiting plate, and the other pair of the friction plates is arranged below the supporting platform and between the lower displacement limiting plate.

[0008] In the above-mentioned compression-resistant connection device, preferably, the energy-absorbing structure further includes a return spring sleeved on the displacement rod, and the return spring is located between the energy-absorbing piston and the displacement limiting plate.

[0009] In the above-mentioned pressure-resistant connection device, preferably, the energy-absorbing structure also includes a shape memory alloy energy-absorbing outer shell, and the energy-absorbing piston, displacement rod, and energy-absorbing baffle are all arranged in the shape memory alloy energy-absorbing outer shell. The shape memory alloy energy-absorbing outer shell is clamped between the upper and lower displacement limiting plates and fixedly connected to the displacement limiting plates. For example, the upper and lower ends of the shape memory alloy energy-absorbing outer shell are also provided with a structure similar to a flange, which is connected to the upper and lower displacement limiting plates by bolts.

[0010] In the above-mentioned compression-resistant connection device, preferably, the two ends of the shape memory alloy energy-absorbing connecting plate are respectively fixedly connected (such as welded) to the shape memory alloy energy-absorbing outer shell and the displacement limiting plate of the adjacent energy-absorbing structure, and play a connecting role at the annular seam of two adjacent lining segments. The shape memory alloy energy-absorbing connecting plate is an open-hole structure with an open hole in the middle, so that the concrete can form a continuous structure.

[0011] In the present invention, specifically, the adaptive energy dissipation connection structure and the role of each structure are analyzed as follows: The displacement rod is tightly connected to the energy-absorbing piston by vertical welding, forming a mutually cooperative mechanical structure system that runs through the entire energy-absorbing structure.

[0012] The energy-absorbing piston is welded and fixed to the displacement rod. Through the piston movement generated by pressure, the compression or stretching degree of the energy-absorbing baffle can be controlled in cooperation with the displacement limiting plate (the deformation amount of the energy-absorbing baffle directly affects its energy-absorbing effect).

[0013] The energy-absorbing baffle is connected to both sides of the energy-absorbing piston and adopts a special friction plate structure. When the displacement limiting plate and / or the energy-absorbing piston are subjected to external stress, the energy-absorbing baffle will be squeezed to deform, and the energy-absorbing baffle will yield under pressure and dissipate energy. The relative displacement of the energy-absorbing baffle will cause the friction force on the surface of the friction plate to do work, converting mechanical energy into heat energy, which can continuously and effectively consume energy and protect the lining segment connection structure from the impact of excessive energy.

[0014] The displacement limiting plate is tightly attached to the upper and lower sides of the energy-absorbing baffle, and plays the role of compressing the energy-absorbing baffle to realize energy dissipation. At the same time, it can cooperate with the size of the accommodating groove in the displacement buffer to limit the displacement range of the above-mentioned energy-absorbing baffle in the vertical direction, thereby avoiding damage to the device structure due to exceeding the normal working range, and preventing collision or excessive extrusion between key components when the device is subjected to extreme or unexpected large stress.

[0015] The return spring is attached to the displacement rod and is arranged between the energy-consuming piston and the displacement limiting plate. When the device is subjected to stress, the energy-consuming baffle is compressed and the return spring is compressed or stretched accordingly, storing elastic potential energy, thus realizing the device reset function and buffering coordinated energy dissipation function.

[0016] The displacement buffer is arranged on the outer end surface of the displacement limiting plate, and has an accommodating groove inside to provide a displacement buffer space for the displacement rod, which plays an energy-absorbing role and helps the device adapt to the relative displacement between the lining segments.

[0017] The shape memory alloy energy dissipation connecting plate is welded to the shape memory alloy energy dissipation outer shell and displacement limiting plate of the adjacent energy dissipation structure on both sides, and plays a role of connection and energy dissipation buffer at the annular seam of the two lining segments. The shape memory alloy energy dissipation connecting plate is made of shape memory alloy material with excellent deformation ability and energy dissipation characteristics, and can effectively buffer and disperse stress through plastic deformation, protect the main structure, and enhance the compressive resistance of the structure.

[0018] The shape memory alloy energy-absorbing outer shell is fastened with bolts and upper and lower displacement limiting plates to protect the main internal energy-absorbing devices. The material of the shape memory alloy energy-absorbing outer shell is similar to that of the shape memory alloy energy-absorbing connecting plate, and it also has a certain compression deformation capacity, which can match the upward and downward movement of the displacement limiting plate under pressure, and the compression deformation can also play an energy-absorbing role.

[0019] In the present invention, the principle of the mechanism of the adaptive energy dissipation connection structure is explained as follows: When the lining segment is subjected to external stress, the external stress is mainly dissipated through displacement buffers, displacement limiting plates, displacement rods, energy-absorbing pistons, energy-absorbing baffles, return springs, etc., and multiple components work together in the transmission process. Figure 2 For example, when the energy-dissipating structure is subjected to downward stress, the external stress first acts on the displacement buffer and displacement limiting plate above. Since there is space for the displacement rod to move up and down in the receiving groove in the displacement buffer, the displacement limiting plate is movably mounted on the displacement rod. When the displacement buffer and displacement limiting plate above move downward, the displacement rod will not move downward first. At this time, the displacement limiting plate compresses the energy-dissipating baffle above downward to achieve energy consumption (the energy-dissipating baffle yields under pressure and does work through friction, converting mechanical energy into heat energy, and continuously and effectively consuming energy). During the compression process, the return spring above is compressed accordingly, which not only achieves energy consumption but also facilitates the return of the displacement limiting plate. When the displacement buffer and displacement limiting plate move downward until the upper end of the displacement rod presses against the upper top of the receiving groove in the upper displacement buffer, the displacement buffer and displacement limiting plate will drive the displacement rod to move downward synchronously, and the energy-dissipating piston also moves downward, compressing the energy-dissipating baffle below to achieve energy consumption. During the compression process, the return spring below is compressed accordingly, which not only achieves energy consumption but also facilitates the return of the displacement limiting plate. When the displacement rod moves downward until its lower end abuts against the bottom of the accommodating groove in the displacement buffer member below, the entire energy dissipation device will no longer compress and dissipate energy. That is, the degree of compression of the energy dissipation baffle is determined by the space between the displacement rod and the accommodating groove, thereby avoiding excessive extrusion of the energy dissipation device.

[0020] In the above energy dissipation process, energy dissipation can be achieved in stages according to the magnitude of stress, that is, the stress borne by the energy dissipation device is not concentrated on the upper or lower energy dissipation baffle. If the stress is small, it only acts on the upper energy dissipation baffle or the lower energy dissipation baffle. If the stress continues to increase, it acts on the upper energy dissipation baffle and the lower energy dissipation baffle in two stages. This makes it easier to disperse the stress and avoid excessive stress acting on the same energy dissipation baffle, causing damage to the energy dissipation structure.

[0021] The energy dissipation structure between adjacent lining segments is connected by a shape memory alloy energy dissipation connection plate. When external stress is applied to the lining segment, the deformation of the segment will drive the overall change of the adaptive energy dissipation connection structure in the installation groove. The shape memory alloy energy dissipation connection plate spans across the adjacent lining segments, transferring the stress of the lining segments on both sides to the energy dissipation structure, so that the displacement limiting plate, shape memory alloy energy dissipation outer shell and other components connected to the shape memory alloy energy dissipation connection plate will also be subjected to corresponding force, and the stress will be transferred to the energy dissipation structure for dissipation. At the same time, the shape memory alloy energy dissipation connection plate is made of shape memory alloy material with excellent deformation ability and energy dissipation characteristics. It can effectively buffer and disperse stress through its own deformation. While playing the role of traditional connection, it can better adapt to dynamic loads such as stratum settlement, displacement or earthquake. Compared with the traditional rigid connection method, the shape memory alloy energy dissipation connection plate allows a certain degree of deformation, reducing the damage to the connection part caused by the inability of the rigid connection to adapt to the deformation, thereby avoiding the misalignment between the segments.

[0022] The compression-resistant connection device of the present invention has the ability to return under normal circumstances. The energy-absorbing baffle and the return spring have the ability to return. The material of the energy-absorbing baffle itself has a certain elasticity and toughness. When the stress is large, the energy-absorbing baffle relies on the return spring to provide a restoring force. When the external stress gradually decreases or disappears, the elastic potential energy stored in the return spring begins to be released, generating a restoring force to act on the energy-absorbing piston and the displacement rod, causing them to move in the opposite direction to when they are stressed, driving the energy-absorbing baffle to gradually return to its initial position. The energy-absorbing baffle and the return spring work together to realize energy consumption and buffering. If they do not return, they will not be able to effectively play the energy-absorbing role when they are subjected to stress next time. The lining segment connection structure will be subjected to greater stress shocks, increasing the risk of damage. Moreover, if they do not return, the device will not be able to return to its initial state, affecting the device's next dynamic load in response to stress. Long-term accumulation may aggravate the deformation of the device structure or even cause it to fail.

[0023] In the above-mentioned compression-resistant connection device, preferably, the lining segment is provided with an installation groove for installing the adaptive energy dissipation connection structure and a grouting port for grouting into the installation groove at the annular seam, and the installation groove is filled with slurry through the grouting port, and the slurry is a concrete slurry with self-repairing function containing shape memory alloy fibers. After grouting, the shape memory alloy fibers are evenly distributed in the grouting area in the installation groove, forming a relatively stable concrete conductive network in the grouting area.

[0024] The above-mentioned compression-resistant connection device preferably also includes an intelligent monitoring mechanism for monitoring concrete damage in the installation groove and for repairing damage cracks.

[0025] In the above-mentioned pressure-resistant connection device, preferably, the intelligent monitoring mechanism includes chip thermistor sensors distributed in the energy-consuming structure (such as the energy-consuming piston and the receiving groove) and the shape memory alloy energy-consuming connecting plate, and an electrode group arranged at intervals along the shape memory alloy fiber distribution path in the grouting area after the grouting of the installation groove is completed.

[0026] In the present invention, the concrete slurry containing shape memory alloy fibers will solidify after grouting, and in the solidified state, the fibers can still be attracted by the electric field to achieve self-healing repair of the contact surface, with a small amount of deformation to cooperate with the movement of the displacement limiting plate. This concrete slurry containing shape memory alloy fibers with self-healing function is based on the unique physical properties of shape memory alloy fibers. When an electric field is applied, the shape memory alloy fibers can still respond to changes in the electric field in the solid structure of concrete. After the electric field is applied, the shape memory alloy fibers will produce a certain electromagnetic effect, prompting them to move toward the cracks. During the movement process, the fibers can effectively reduce the width and depth of the cracks by virtue of their own shape memory characteristics and the interaction with the concrete, thereby achieving self-healing repair of the contact surface.

[0027] In the present invention, when the stress changes, the contact surface between the grouting area of ​​the pipe segment and the device is first damaged, and the small patch type thermistor sensor monitors the changes in energy consumption and temperature rise between these parts and the contact surface, thereby realizing intelligent analysis of the working condition and possible degree of damage of the device. This situation is based on monitoring the energy consumption and temperature rise, mainly using a small patch type thermistor sensor to monitor the temperature change caused by the heat generated by energy conversion in the energy consumption process of the energy-consuming structure, so as to analyze the working condition and possible degree of damage of the device. At the same time, in the present invention, each electrode group corresponds to a specific area of ​​the grouting area. When a crack appears in a certain area, the resistance of the shape memory alloy fiber corresponding to the area will first change significantly. By comparing the resistance changes measured by different electrode groups, the approximate area where the crack appears can be preliminarily determined, and the real-time monitoring of the damage to the grouting area can be realized. The intelligent monitoring mechanism performs numerical analysis on the data collected by the electrode group. When the resistance change exceeds a certain threshold, indicating that a crack has appeared, the system automatically controls the circuit switching, switches the electrode group from the resistance measurement mode to the electric field application mode, and adjusts the voltage and current of the power supply device according to the preset parameters for the area with abnormal resistance value to achieve the attraction of the fiber. The intelligent monitoring mechanism records and analyzes various data during crack monitoring and fiber attraction processes to provide a basis for subsequent repair effect evaluation and optimization.

[0028] In the present invention, when the device consumes energy and generates heat, the shape memory alloy fibers in the grouting material change due to temperature changes and can play a self-repairing role. The shape memory alloy fibers in the slurry are attracted to the cracks on the contact surface under the influence of the electric field changes in the damaged area, and the width and depth of the cracks are effectively reduced through the shape memory alloy characteristics, so that the cracks can reach a state of near healing to a certain extent, and the self-healing repair of the above-mentioned contact surface is achieved. This helps to maintain the integrity and stability of the lining segment structure and further reduce the occurrence of misalignment between segments. If the crack width is too large, slurry can be injected through the grouting port as needed to improve the repair effect.

[0029] The compression-resistant connection device of the annular seam of the lining segment of the present invention realizes effective energy consumption at different stress stages, buffers and disperses stress, reduces the force transmitted to the main body of the lining segment, better copes with high stress and large deformation, and improves the seismic performance and safety of the structure through the energy-absorbing baffle, return spring and other components in the adaptive energy-absorbing connection structure and the shape memory alloy energy-absorbing connection plate. The energy-absorbing baffle and return spring in the adaptive energy-absorbing connection structure, as well as the shape memory alloy energy-absorbing connection plate, can allow a certain degree of deformation, can better adapt to the dynamic load effects such as stratum settlement, displacement or earthquake, and reduce the problems such as damage to the connection parts caused by the inability of the rigid connection to adapt to deformation. The installation groove reserved for the lining segment is injected with a self-repairing grouting material containing shape memory alloy fibers through the grouting port. When the device consumes energy and generates heat, the shape memory alloy fibers in the grouting material change due to temperature changes, which can play a self-repairing role and further improve the compressive resistance. Through the small patch thermistor sensors distributed on the energy-absorbing piston and the shape memory alloy energy-absorbing connecting plate, and the electrode groups arranged at intervals along the shape memory alloy fiber distribution path, the approximate area where the cracks appear can be preliminarily determined by the value change of the resistance in the area, and the voltage and current can be adjusted according to the preset parameters for the area with abnormal resistance value to achieve the attraction of the fiber, thereby realizing the crack monitoring and self-repair function for the grouting area. The intelligent monitoring mechanism records and analyzes various data in the crack monitoring and fiber attraction process to provide a basis for the subsequent evaluation and optimization of the repair effect.

[0030] Compared with the prior art, the advantages of the present invention are: The compression-resistant connection device of the lining segment annular seam of the present invention connects the adjacent lining segment annular seams through an adaptive energy-dissipating connection structure, and realizes effective energy consumption at different stress stages through the energy-dissipating effect of the adaptive energy-dissipating connection structure, buffers and disperses stress, reduces the force transmitted to the lining segment body, better copes with high stress and large deformation, and improves the seismic performance and safety of the structure. The adaptive energy-dissipating connection structure allows a certain degree of deformation, can better adapt to dynamic loads such as stratum settlement, displacement or earthquake, reduces problems such as damage to the connection part caused by the inability of the rigid connection to adapt to deformation, and reduces the occurrence of misalignment between segments.

[0031] The compression-resistant connection device for the annular seam of the lining segment of the present invention can not only exert the connection function of the traditional connection method, but also improve the bearing capacity and compression resistance of the lining segment while taking into account the characteristics of easy maintenance and replacement. It is suitable for scenes such as tunnels passing through active fault zones and subway tunnels with high vibration load frequencies. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a schematic structural diagram of a compression-resistant connection device for annular seams of lining segments in an embodiment.

[0034] Figure 2 Schematic diagram of the structure of the adaptive energy dissipation connection structure in the embodiment.

[0035] Figure 3 Schematic diagram of the internal structure of the energy dissipation structure in the embodiment.

[0036] Figure 4 Schematic diagram of the structure of the energy dissipation structure in the embodiment.

[0037] Figure 5 Schematic diagram of the internal structure of the displacement buffer in the energy dissipation structure in the embodiment.

[0038] Legend 01. Lining segment; 02. Annular seam; 03. Shape memory alloy fiber; 04. Grouting port; 05. Installation groove; 1. Energy dissipation structure; 11. Shape memory alloy energy dissipation outer shell; 12. Displacement buffer; 121. Receiving groove; 13. Bolt; 14. Energy dissipation piston; 141. Cap; 15. Return spring; 16. Displacement rod; 17. Energy dissipation baffle; 18. Displacement limiting plate; 2. Shape memory alloy energy dissipation connection plate; 31. Surface-mount thermistor sensor; 32. Electrode group. DETAILED DESCRIPTION

[0039] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively and meticulously below in conjunction with the accompanying drawings and preferred embodiments of the present invention, but the protection scope of the present invention is not limited to the following specific embodiments.

[0040] It should be noted that when an element is described as being "fixed, fixed, connected or connected to" another element, it can be directly fixed, fixed, connected or connected to the other element, or it can be indirectly fixed, fixed, connected or connected to the other element through other intermediate connectors.

[0041] Unless otherwise defined, all the professional terms used below have the same meanings as those generally understood by those skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention.

[0042] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0043] Example: like Figure 1-Figure 5 As shown, the compression-resistant connection device of the annular seam of the lining segment of this embodiment includes adjacently arranged lining segments 01 and an adaptive energy-absorbing connection structure provided at the annular seam 02 of the adjacent lining segments 01, the adaptive energy-absorbing connection structure includes energy-absorbing structures 1 respectively provided in the adjacent lining segments 01 and shape memory alloy energy-absorbing connection plates 2 for connecting the adjacent energy-absorbing structures 1, and the shape memory alloy energy-absorbing connection plates 2 are provided across the adjacent lining segments 01.

[0044] Specifically, Figure 3 , Figure 4 , Figure 5As shown, in this embodiment, the energy-absorbing structure 1 includes an energy-absorbing piston 14, a displacement rod 16, an energy-absorbing baffle 17, a displacement limiting plate 18 and a displacement buffer 12. The displacement rod 16 and the energy-absorbing piston 14 are coaxially fixed, and the energy-absorbing piston 14 is located in the middle of the displacement rod 16. The displacement limiting plate 18 is movably sleeved on both ends of the displacement rod 16. The energy-absorbing baffle 17 is fixed to the side of the energy-absorbing piston 14, and the energy-absorbing baffle 17 is clamped between the energy-absorbing piston 14 and the displacement limiting plate 18. The displacement buffer 12 is fixed to the outer end surface of the displacement limiting plate 18. The displacement buffer 12 is provided with a receiving groove 121 for accommodating the displacement rod 16 near the displacement limiting plate 18, and the end of the displacement rod 16 can be movably arranged in the receiving groove 121 up and down. When in a normal stress state, the upper end of the displacement rod 16 does not abut against the top of the accommodating groove 121 in the upper displacement buffer 12, and the lower end of the displacement rod 16 does not abut against the bottom of the accommodating groove 121 in the lower displacement buffer 12, so as to facilitate the up and down movement of the displacement rod 16.

[0045] In this embodiment, the energy-absorbing baffle 17 includes two pairs of symmetrically distributed friction plates. A support 141 is provided in the middle of the side of the energy-absorbing piston 14. One pair of friction plates is provided above the support 141 and between the displacement limiting plate 18 above it, and the other pair of friction plates is provided below the support 141 and between the displacement limiting plate 18 below it.

[0046] In this embodiment, the energy dissipation structure 1 further includes a return spring 15 sleeved on the displacement rod 16 , and the return spring 15 is located between the energy dissipation piston 14 and the displacement limiting plate 18 .

[0047] In this embodiment, the energy-absorbing structure 1 also includes a shape memory alloy energy-absorbing outer shell 11, in which the energy-absorbing piston 14, the displacement rod 16, and the energy-absorbing baffle 17 are all arranged. The shape memory alloy energy-absorbing outer shell 11 is clamped between the upper and lower displacement limiting plates 18 and is fixedly connected to the displacement limiting plates 18. The upper and lower ends of the shape memory alloy energy-absorbing outer shell 11 are also provided with a structure similar to a flange, which is connected to the upper and lower displacement limiting plates 18 by bolts 13.

[0048] In this embodiment, the two ends of the shape memory alloy energy dissipation connection plate 2 are respectively fixedly connected to the shape memory alloy energy dissipation outer shell 11 and the displacement limiting plate 18 of the adjacent energy dissipation structure 1, and the shape memory alloy energy dissipation connection plate 2 is an open structure with a hole in the middle.

[0049] like Figure 1 As shown, in this embodiment, the lining segment 01 is provided with an installation groove 05 for installing an adaptive energy dissipation connection structure and a grouting port 04 for grouting into the installation groove 05 at the annular seam 02, and the installation groove 05 is filled with slurry through the grouting port 04, and the slurry is a concrete slurry with self-repairing function containing shape memory alloy fibers 03.

[0050] In this embodiment, an intelligent monitoring mechanism is also included for monitoring the concrete damage in the installation groove 05 and for repairing the damage cracks. The intelligent monitoring mechanism includes a patch type thermistor sensor 31 distributed in the energy dissipation structure 1 and the shape memory alloy energy dissipation connection plate 2, and an electrode group 32 arranged at intervals along the distribution path of the shape memory alloy fiber 03 in the grouting area after the grouting of the installation groove 05 is completed.

[0051] The compression-resistant connection device of the annular seam of the lining segment of this embodiment realizes effective energy consumption at different stress stages through the energy-absorbing baffle 17, return spring 15 and other components in the adaptive energy-absorbing connection structure and the shape memory alloy energy-absorbing connecting plate 2, buffers and disperses stress, reduces the force transmitted to the main body of the lining segment 01, better copes with high stress and large deformation, and improves the seismic performance and safety of the structure. The energy-absorbing baffle 17 and return spring 15 in the adaptive energy-absorbing connection structure, as well as the shape memory alloy energy-absorbing connecting plate 2, can allow a certain degree of deformation, can better adapt to the dynamic load effects such as stratum settlement, displacement or earthquake, and reduce the problems such as damage to the connection part caused by the inability of the rigid connection to adapt to deformation. The installation groove 05 reserved in the lining segment 01 is injected with a self-repairing grouting material containing shape memory alloy fibers 03 through the grouting port 04. When the device consumes energy and generates heat, the shape memory alloy fibers 03 in the grouting material change due to temperature changes, and can play a self-repairing role, further improving the compressive resistance. Through the patch thermistor sensors 31 distributed on the energy-absorbing piston 14 and the shape memory alloy energy-absorbing connecting plate 2, and the electrode groups 32 arranged at intervals along the distribution path of the shape memory alloy fiber 03, the approximate area where the cracks appear can be preliminarily determined by the value change of the resistance in the area, and the voltage and current can be adjusted according to the preset parameters for the area with abnormal resistance value to achieve the attraction of the fiber, thereby realizing the crack monitoring and self-repair function for the grouting area. The intelligent monitoring mechanism records and analyzes various data in the crack monitoring and fiber attraction process to provide a basis for the subsequent evaluation and optimization of the repair effect.

[0052] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A compression-resistant connection device for annular seams of lining segments, characterized in that: The invention comprises adjacently arranged lining segments (01) and an adaptive energy dissipation connection structure provided at the annular seams (02) of the adjacent lining segments (01), wherein the adaptive energy dissipation connection structure comprises energy dissipation structures (1) respectively provided in the adjacent lining segments (01) and a shape memory alloy energy dissipation connection plate (2) used for connecting the adjacent energy dissipation structures (1), wherein the shape memory alloy energy dissipation connection plate (2) is provided across between the adjacent lining segments (01).

2. The compression-resistant connection device according to claim 1, characterized in that: The energy dissipation structure (1) comprises an energy dissipation piston (14), a displacement rod (16), an energy dissipation baffle (17), a displacement limiting plate (18) and a displacement buffer (12); the displacement rod (16) and the energy dissipation piston (14) are coaxially fixedly connected, and the energy dissipation piston (14) is located in the middle of the displacement rod (16); the displacement limiting plate (18) is movably sleeved on both ends of the displacement rod (16); the energy dissipation baffle (17) and the energy dissipation piston (14) are coaxially fixedly connected, and the energy dissipation piston (14) is located in the middle of the displacement rod (16); the displacement limiting plate (18) is movably sleeved on both ends of the displacement rod (16); 4), and the energy-absorbing baffle (17) is clamped between the energy-absorbing piston (14) and the displacement limiting plate (18), the displacement buffer (12) is fixed to the outer end surface of the displacement limiting plate (18), and the displacement buffer (12) is provided with a receiving groove (121) for receiving the displacement rod (16) near the displacement limiting plate (18), and the end of the displacement rod (16) is movably arranged in the receiving groove (121).

3. The compression-resistant connection device according to claim 2, characterized in that: The energy-absorbing baffle (17) comprises two pairs of symmetrically distributed friction plates. A support platform (141) is provided in the middle of the side surface of the energy-absorbing piston (14). One pair of the friction plates is provided above the support platform (141) and between the displacement limiting plate (18) above, and the other pair of the friction plates is provided below the support platform (141) and between the displacement limiting plate (18) below.

4. The compression-resistant connection device according to claim 2, characterized in that: The energy dissipation structure (1) further comprises a return spring (15) sleeved on the displacement rod (16), wherein the return spring (15) is located between the energy dissipation piston (14) and the displacement limiting plate (18).

5. The compression-resistant connection device according to claim 2, characterized in that: The energy dissipation structure (1) further comprises a shape memory alloy energy dissipation outer shell (11), the energy dissipation piston (14), the displacement rod (16), and the energy dissipation baffle (17) are all arranged in the shape memory alloy energy dissipation outer shell (11), and the shape memory alloy energy dissipation outer shell (11) is clamped between the upper and lower displacement limiting plates (18) and is fixedly connected to the displacement limiting plates (18).

6. The compression-resistant connection device according to claim 5, characterized in that: The two ends of the shape memory alloy energy dissipation connection plate (2) are respectively fixedly connected to the shape memory alloy energy dissipation outer shell (11) and the displacement limiting plate (18) of the adjacent energy dissipation structure (1), and the shape memory alloy energy dissipation connection plate (2) is an open-hole structure with an open hole in the middle.

7. The pressure-resistant connection device according to any one of claims 2 to 6, characterized in that: The lining segment (01) is provided with an installation groove (05) for installing the adaptive energy dissipation connection structure and a grouting port (04) for grouting into the installation groove (05) at the annular joint (02); the installation groove (05) is filled with slurry through the grouting port (04); the slurry is a concrete slurry with a self-repairing function containing shape memory alloy fibers (03).

8. The compression-resistant connection device according to claim 7, characterized in that: It also includes an intelligent monitoring mechanism for monitoring concrete damage in the installation groove (05) and for repairing damage cracks.

9. The compression-resistant connection device according to claim 8, characterized in that: The intelligent monitoring mechanism comprises a patch type thermistor sensor (31) distributed in the energy dissipation structure (1) and at the shape memory alloy energy dissipation connection plate (2), and an electrode group (32) arranged at intervals along the distribution path of the shape memory alloy fibers (03) in the grouting area after grouting of the installation groove (05) is completed.

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