A compressive connection device for the circumferential joint of a lining segment

Abstract

The present invention discloses a compressive connection device for the circumferential joint of a lining segment, which includes adjacent lining segments and an adaptive energy dissipation connection structure disposed at the circumferential joint of the adjacent lining segments. The adaptive energy dissipation connection structure includes an energy dissipation structure respectively disposed in the adjacent lining segments and a shape memory alloy energy dissipation connection plate for connecting the adjacent energy dissipation structures. The shape memory alloy energy dissipation connection plate is disposed across between the adjacent lining segments. The compressive connection device of the present invention can not only exert the connection function of the traditional connection method, but also improve the bearing capacity and compressive capacity of the lining segments while taking into account the characteristics of being easy to maintain and replace, and is applicable to scenarios such as tunnels passing through active fault zones and subway tunnels with high vibration load frequencies.

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:

[0006] 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.

[0007] In the above-mentioned compressive connection device, preferably, the energy dissipation structure includes an energy dissipation piston, a displacement rod, an energy dissipation baffle, a displacement limiting plate and a displacement buffer. The displacement rod and the energy dissipation piston are coaxially and fixedly connected (for example, they are coaxially welded to move synchronously), and the energy dissipation piston is located in the middle of the displacement rod. The displacement limiting plate is movably sleeved at both ends of the displacement rod. The energy dissipation baffle is fixedly connected to the side surface of the energy dissipation piston, and the energy dissipation baffle is clamped between the energy dissipation piston and the displacement limiting plate. The displacement buffer is fixedly arranged on the outer end surface of the displacement limiting plate (for example, by welding). An accommodation groove for accommodating the displacement rod is provided at a position close to the displacement limiting plate of the displacement buffer, and the end of the displacement rod is movably arranged in the accommodation groove up and down.

[0008] In the above-mentioned compressive connection device, preferably, the energy dissipation baffle includes two pairs of symmetrically distributed friction plates. A bearing platform is provided in the middle of the side surface of the energy dissipation piston. One pair of the friction plates is arranged between the bearing platform and the upper displacement limiting plate above, and the other pair of the friction plates is arranged between the bearing platform and the lower displacement limiting plate below.

[0009] In the above-mentioned compressive connection device, preferably, the energy dissipation structure further includes a return spring sleeved on the displacement rod, and the return spring is located between the energy dissipation piston and the displacement limiting plate.

[0010] In the above-mentioned compressive connection device, preferably, the energy dissipation structure further includes a shape memory alloy energy dissipation outer shell. The energy dissipation piston, the displacement rod and the energy dissipation baffle are all arranged in the shape memory alloy energy dissipation outer shell. The shape memory alloy energy dissipation outer shell is clamped between the upper and lower displacement limiting plates and fixedly connected to the displacement limiting plates. For example, similar flange-like structures are also provided at the upper and lower ends of the shape memory alloy energy dissipation outer shell, and are connected to the upper and lower displacement limiting plates through bolts.

[0011] In the above-mentioned compressive connection device, preferably, both ends of the shape memory alloy energy dissipation connecting plate are fixedly connected (such as by welding) to the shape memory alloy energy dissipation outer shell and the displacement limiting plate of the adjacent energy dissipation structure, and play a connecting role at the circumferential joint of two adjacent lining segments. The shape memory alloy energy dissipation connecting plate is an open-hole structure with a hole in the middle to facilitate the formation of a continuous structure by concrete.

[0012] In the present invention, specifically, the analysis of the self-adaptive energy dissipation connection structure and the functions of each structure is as follows:

[0013] The displacement rod is tightly connected to the energy dissipation piston by vertical welding, forming a mechanical structure system that cooperates with each other and runs through the entire energy dissipation structure.

[0014] The energy-consuming piston is fixedly welded to the displacement rod. Through the piston movement generated by compression, in cooperation with the displacement limiting plate, the compression or stretching degree of the energy-consuming baffle can be controlled (the deformation amount of the energy-consuming baffle directly affects its energy-consuming effect).

[0015] The energy-consuming baffle is connected to both sides of the energy-consuming piston and adopts a special friction plate structure. When the displacement limiting plate and / or the energy-consuming piston are subjected to external stress, they will squeeze the energy-consuming baffle to cause it to deform. The energy-consuming baffle is compressed and yields to achieve the function of dissipating energy. The relative displacement of the energy-consuming baffle will cause the frictional 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 excessive energy impact.

[0016] The displacement limiting plate is closely attached to the upper and lower sides of the energy-consuming baffle, playing the role of compressing the energy-consuming baffle to achieve energy consumption. At the same time, it can cooperate with the size of the accommodation groove in the displacement buffer member to limit the displacement range of the above-mentioned energy-consuming baffle in the vertical direction, avoiding damage to the device structure due to exceeding the normal working range, and preventing collisions or excessive squeezing between key components when the device is subjected to extreme or accidental large stresses.

[0017] 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, while the energy-consuming baffle is compressed, the return spring is correspondingly compressed or stretched to store elastic potential energy, realizing the device reset function and the buffer and collaborative energy-consuming function.

[0018] The displacement buffer member is arranged on the outer end face of the displacement limiting plate, and an accommodation groove is provided inside to provide a displacement buffer space for the displacement rod, playing an energy-consuming role to help the device adapt to the relative displacement between the lining segments.

[0019] The shape memory alloy energy-consuming connection plate is welded to the shape memory alloy energy-consuming outer shell and the displacement limiting plate of the adjacent energy-consuming structure on both sides respectively, playing a connecting and energy-consuming buffering role at the circumferential joint of the two lining segments. The shape memory alloy energy-consuming connection plate is made of a 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 capacity of the structure.

[0020] The shape memory alloy energy-consuming outer shell is fixedly connected by bolts and the upper and lower displacement limiting plates, playing a protective role for the main internal energy-consuming devices. The material of the shape memory alloy energy-consuming outer shell is similar to that of the shape memory alloy energy-consuming connection plate, and also has a certain compression deformation ability, which can match the up and down movement of the displacement limiting plate under pressure. At the same time, the compression deformation can also play an energy-consuming role.

[0021] In the present invention, the principle of the working mechanism of the adaptive energy-consuming connection structure is explained as follows:

[0022] When the lining segment is subjected to external stress, the external stress mainly dissipates energy through displacement buffers, displacement limit plates, displacement rods, energy-consuming pistons, energy-consuming baffles, return springs, etc. Multiple components cooperate during the transmission process. Taking Figure 2 as an example, when the energy-consuming structure is subjected to downward stress, the external stress first acts on the upper displacement buffer and displacement limit plate. Since there is space in the accommodation groove of the displacement buffer for the displacement rod to move up and down, and the displacement limit plate is movably sleeved on the displacement rod, when the upper displacement buffer and displacement limit plate move downward, the displacement rod will not move downward first. At this time, the displacement limit plate compresses the upper energy-consuming baffle downward to achieve energy dissipation (the energy-consuming baffle is compressed and yields and does work through friction, converting mechanical energy into heat energy and continuously and effectively consuming energy). During the compression process, the upper return spring is correspondingly compressed, achieving energy dissipation and facilitating the return of the displacement limit plate. When the displacement buffer and displacement limit plate move downward until the upper end of the displacement rod abuts against the upper top of the accommodation groove in the upper displacement buffer, at this time, the displacement buffer and displacement limit plate will drive the displacement rod to move downward synchronously, and the energy-consuming piston also moves downward, compressing the lower energy-consuming baffle to achieve energy dissipation. During the compression process, the lower return spring is correspondingly compressed, achieving energy dissipation and facilitating the return of the displacement limit plate. When the displacement rod moves downward until its lower end abuts against the bottom of the accommodation groove in the lower displacement buffer, at this time, the entire energy-consuming device will no longer be compressed for energy dissipation, that is, the compression degree of the energy-consuming baffle is determined by the space between the displacement rod and the accommodation groove, which can prevent the energy-consuming device from being overly squeezed.

[0023] During the above energy dissipation process, energy dissipation can be achieved in stages according to the magnitude of the stress, that is, the stress borne by the energy-consuming device is not concentrated on the upper or lower energy-consuming baffles. If the stress is small, it only acts on the upper or lower energy-consuming baffle. If the stress continues to increase, it acts on the upper and lower energy-consuming baffles in two stages. This facilitates the dispersion of stress and avoids excessive stress acting on the same energy-consuming baffle, causing damage to the energy-consuming structure.

[0024] The energy dissipation structure between adjacent lining segments is connected by a shape memory alloy energy dissipation connecting plate. When external stress is applied to the lining segments, the deformation of the segments will drive the overall change of the adaptive energy dissipation connection structure in the installation groove. The shape memory alloy energy dissipation connecting plate straddles adjacent lining segments, transferring the stress received by the two-side lining segments to the energy dissipation structure, so that components such as the displacement limiting plate and the shape memory alloy energy dissipation outer shell connected to the shape memory alloy energy dissipation connecting plate will also be stressed accordingly, and the stress is transferred to the energy dissipation structure for dissipation. At the same time, the shape memory alloy energy dissipation connecting plate is made of a shape memory alloy material with excellent deformation ability and energy dissipation characteristics, and 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 ground settlement, displacement or earthquake. Compared with the traditional rigid connection method, the shape memory alloy energy dissipation connecting plate allows a certain degree of deformation, reducing the damage of the connection part caused by the inability of the rigid connection to adapt to deformation, thus avoiding the phenomenon of staggered joints between segments.

[0025] The compressive connection device of the present invention has the ability to return to its original position under normal circumstances. The energy dissipation baffle and the return spring have the ability to return to their original positions. The material of the energy dissipation baffle itself has a certain elasticity and toughness. When the stress is large, the energy dissipation baffle has to rely on the return spring to provide the 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 acting on the energy dissipation piston and the displacement rod, causing them to move in the opposite direction to that when stressed, driving the energy dissipation baffle to gradually return to the initial position. The energy dissipation baffle and the return spring work together to achieve energy consumption and buffering. If it does not return to its original position, when stressed next time, it cannot effectively play the role of energy dissipation, and the lining segment connection structure will bear a greater stress impact, increasing the risk of damage. And if it does not return to its original position, it will also cause the device to not return to the initial state, affecting the dynamic load of the device corresponding to the stress next time. Long-term accumulation may cause the device structure to deform more severely and even fail.

[0026] In the above-mentioned compressive 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 circumferential joint. The installation groove is filled with slurry through the grouting port, and the slurry is a self-healing concrete slurry containing shape memory alloy fibers. After grouting is completed, the shape memory alloy fibers are evenly distributed in the grouting area of the installation groove, forming a relatively stable concrete conductive network in the grouting area.

[0027] In the above-mentioned compressive connection device, preferably, it further includes an intelligent monitoring mechanism for monitoring the concrete damage condition in the installation groove and for repairing the damaged cracks.

[0028] In the above anti-compression connection device, preferably, the intelligent monitoring mechanism includes patch-type thermistor sensors distributed in the energy dissipation structure (such as at the energy dissipation piston and the accommodation groove) and at the shape memory alloy energy dissipation connection plate, and an electrode group arranged at intervals along the distribution path of the shape memory alloy fibers in the grouting area after the installation groove is grouted.

[0029] In the present invention, the concrete slurry containing shape memory alloy fibers will solidify after grouting, and in the solidified state, it can still attract the fibers through an 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 self-healing concrete slurry containing shape memory alloy fibers, based on the unique physical properties of the shape memory alloy fibers, can still respond to the change of the electric field in the solid concrete structure when an electric field is applied. After the electric field is applied, it will cause a certain electromagnetic effect on the shape memory alloy fibers, prompting them to move towards the cracks. During the movement, the fibers can effectively reduce the width and depth of the cracks and achieve self-healing repair of the contact surface by virtue of their own shape memory characteristics and the interaction with the concrete.

[0030] In the present invention, when the stress changes, the contact surface between the segment grouting area and the device is first damaged. The small patch-type thermistor sensors monitor the change of the energy dissipation temperature rise between these parts and the contact surface, so as to realize the intelligent analysis of the working condition and possible damage degree of the device. This situation is monitored based on the energy dissipation temperature rise, mainly using small patch-type thermistor sensors to monitor the temperature change caused by the heat generated by energy conversion during the energy dissipation process of the energy dissipation structure, so as to analyze the working condition and possible damage degree 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 fibers corresponding to this area will first change significantly. By comparing the resistance change measured by different electrode groups, the approximate area where the crack appears can be initially determined, and the real-time monitoring of the damage condition of 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 occurred, the system automatically controls the circuit to switch, 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 fibers. The intelligent monitoring mechanism provides a basis for the subsequent repair effect evaluation and optimization by recording and analyzing various data during the crack monitoring and fiber attraction process.

[0031] 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 at the contact surface under the influence of the electric field change in the damaged area. The width and depth of the cracks are effectively reduced through the characteristics of the shape memory alloy, so that the cracks reach an approximately healed state to a certain extent, realizing the self-healing repair of the above contact surface. This helps to maintain the integrity and stability of the lining segment structure and further reduces 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.

[0032] The compression connection device for the circumferential joint of the lining segment of the present invention realizes the effective consumption of energy, buffers and disperses stress, reduces the force transmitted to the main body of the lining segment, better copes with high stress and large deformation conditions, and improves the seismic performance and safety of the structure through energy-consuming baffles, return springs and other components in the adaptive energy-consuming connection structure and the shape memory alloy energy-consuming connection plate. The energy-consuming baffle and return spring in the adaptive energy-consuming connection structure, as well as the shape memory alloy energy-consuming connection plate, can all allow a certain degree of deformation, can better adapt to dynamic loads such as ground settlement, displacement or earthquake, and reduce problems such as damage to the connection part caused by the inability of rigid connection to adapt to deformation. The reserved installation groove of the lining segment is injected with a self-healing 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 and can play a self-healing role, further improving the compressive capacity. Through the small patch-type thermistor sensors distributed on the energy-consuming piston and the shape memory alloy energy-consuming connection plate, and the electrode groups arranged at intervals along the distribution path of the shape memory alloy fibers, the approximate area where cracks appear can be preliminarily determined through the numerical 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 values to achieve the attraction of the fibers, thereby realizing the crack monitoring and self-healing functions for the grouting area. The intelligent monitoring mechanism provides a basis for the subsequent evaluation and optimization of the repair effect by recording and analyzing various data during the crack monitoring and fiber attraction processes.

[0033] Compared with the prior art, the advantages of the present invention are as follows:

[0034] The compressive connection device for the circumferential joint of the lining segment of the present invention connects adjacent circumferential joints of the lining segments through an adaptive energy-dissipating connection structure. Through the energy-dissipating effect of the adaptive energy-dissipating connection structure, effective energy consumption is achieved at different stress stages, stress is buffered and dispersed, the force transmitted to the main body of the lining segment is reduced, and the situation of high stress and large deformation can be better coped with, improving 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 ground settlement, displacement or earthquake, and reduces problems such as damage to the connection part caused by the inability of rigid connection to adapt to deformation, and reduces the occurrence of the phenomenon of misalignment between segments.

[0035] The compressive connection device for the circumferential joint of the lining segment of the present invention can not only play the connection function of the traditional connection method, but also improve the bearing capacity and compressive capacity of the lining segment while taking into account the characteristics of being easy to maintain and replace, and is applicable to scenarios such as tunnels passing through active fault zones and subway tunnels with high vibration load frequencies. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0037] Figure 1 It is a schematic structural diagram of the compressive connection device for the circumferential joint of the lining segment in the embodiment.

[0038] Figure 2 It is a schematic structural diagram of the adaptive energy-dissipating connection structure in the embodiment.

[0039] Figure 3 It is a schematic internal structural diagram of the energy-dissipating structure in the embodiment.

[0040] Figure 4 It is a schematic structural diagram of the energy-dissipating structure in the embodiment.

[0041] Figure 5 It is a schematic internal structural diagram of the displacement buffer in the energy-dissipating structure in the embodiment.

[0042] LEGEND DESCRIPTION

[0043] 01. Lining segment; 02. Ring joint; 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. Accommodation groove; 13. Bolt; 14. Energy dissipation piston; 141. Bearing platform; 15. Return spring; 16. Displacement rod; 17. Energy dissipation baffle; 18. Displacement limiting plate; 2. Shape memory alloy energy dissipation connection plate; 31. Patch type thermistor sensor; 32. Electrode group. Detailed implementation mode

[0044] To facilitate the understanding of the present invention, the following will describe the present invention more comprehensively and meticulously in conjunction with the specification drawings and preferred embodiments, but the protection scope of the present invention is not limited to the following specific embodiments.

[0045] It should be particularly noted that when an element is described as "fixed to, fixedly connected to, connected to or communicated with" another element, it can be directly fixed, fixedly connected, connected or communicated to the other element, or indirectly fixed, fixedly connected, connected or communicated to the other element through other intermediate connecting members.

[0046] Unless otherwise defined, all professional terms used hereinafter have the same meaning as commonly 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 protection scope of the present invention.

[0047] Unless otherwise specifically stated, various raw materials, reagents, instruments and equipment used in the present invention can be obtained through market purchase or can be prepared by existing methods.

[0048] Embodiment:

[0049] As Figures 1 - 5 shown, the compressive connection device for the ring joint of the lining segment in this embodiment includes adjacent lining segments 01 and an adaptive energy dissipation connection structure provided at the ring joint 02 of the adjacent lining segments 01. The adaptive energy dissipation connection structure includes an energy dissipation structure 1 respectively provided in the adjacent lining segments 01 and a shape memory alloy energy dissipation connection plate 2 for connecting the adjacent energy dissipation structures 1. The shape memory alloy energy dissipation connection plate 2 is horizontally arranged between the adjacent lining segments 01.

[0050] Specifically, as Figure 3 , Figure 4 , Figure 5As shown in the figure, in this embodiment, the energy dissipation structure 1 includes 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 and fixedly connected, and the energy dissipation piston 14 is located at the middle position of the displacement rod 16. The displacement limiting plate 18 is movably sleeved at both ends of the displacement rod 16. The energy dissipation baffle 17 is fixedly connected to the side surface of the energy dissipation piston 14, and the energy dissipation baffle 17 is clamped between the energy dissipation piston 14 and the displacement limiting plate 18. The displacement buffer 12 is fixedly arranged on the outer end surface of the displacement limiting plate 18. A receiving groove 121 for receiving the displacement rod 16 is provided near the displacement limiting plate 18 of the displacement buffer 12, and the end of the displacement rod 16 is movably arranged up and down in the receiving groove 121. When in a normal stress state, the upper end of the displacement rod 16 does not abut against the top of the receiving 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 receiving groove 121 in the lower displacement buffer 12, so as to facilitate the up and down movement of the displacement rod 16.

[0051] In this embodiment, the energy dissipation baffle 17 includes two pairs of symmetrically distributed friction plates. A bearing platform 141 is provided in the middle of the side surface of the energy dissipation piston 14. One pair of friction plates is arranged between the bearing platform 141 and the upper displacement limiting plate 18 above, and the other pair of friction plates is arranged between the bearing platform 141 and the lower displacement limiting plate 18 below.

[0052] In this embodiment, the energy dissipation structure 1 further includes a return spring 15 sleeved on the displacement rod 16. The return spring 15 is located between the energy dissipation piston 14 and the displacement limiting plate 18.

[0053] In this embodiment, the energy dissipation structure 1 further includes 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. The shape memory alloy energy dissipation outer shell 11 is clamped between the upper and lower displacement limiting plates 18 and fixedly connected to the displacement limiting plate 18. Similar flange-like structures are also provided at the upper and lower ends of the shape memory alloy energy dissipation outer shell 11 and are connected to the upper and lower displacement limiting plates 18 through bolts 13.

[0054] In this embodiment, the two ends of the shape memory alloy energy dissipation connecting 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. The shape memory alloy energy dissipation connecting plate 2 is an opening structure with an opening in the middle.

[0055] As Figure 1 shown, in this embodiment, 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 circumferential joint 02. The installation groove 05 is filled with slurry through the grouting port 04. The slurry is a self-healing concrete slurry containing shape memory alloy fibers 03.

[0056] In this embodiment, it further includes an intelligent monitoring mechanism for monitoring the concrete damage condition in the installation groove 05 and for repairing damaged cracks. The intelligent monitoring mechanism includes patch-type thermistor sensors 31 distributed in the energy dissipation structure 1 and at the shape memory alloy energy dissipation connecting plate 2, and electrode groups 32 arranged at intervals along the distribution path of the shape memory alloy fibers 03 in the grouting area after the grouting of the installation groove 05 is completed.

[0057] The compressive connection device for the circumferential joint of the lining segment in this embodiment realizes the effective consumption of energy, buffers and disperses stress through components such as the energy dissipation baffle 17 and the return spring 15 in the adaptive energy dissipation connection structure, and the shape memory alloy energy dissipation connecting plate 2, reduces the force transmitted to the main body of the lining segment 01, better copes with the situations of high stress and large deformation, and improves the seismic performance and safety of the structure. The energy dissipation baffle 17 and the return spring 15 in the adaptive energy dissipation connection structure, as well as the shape memory alloy energy dissipation connecting plate 2, etc. can all allow a certain degree of deformation, can better adapt to dynamic load actions such as ground settlement, displacement or earthquake, and reduce problems such as damage to the connection part caused by the inability of rigid connection to adapt to deformation. The reserved installation groove 05 of the lining segment 01 is injected with a self-healing grouting material containing shape memory alloy fibers 03 through the grouting port 04. When heat is generated due to energy dissipation of the device, the shape memory alloy fibers 03 in the grouting material change due to temperature change and can play a self-healing role, further improving the compressive capacity. Through the patch-type thermistor sensors 31 distributed on the energy dissipation piston 14 and the shape memory alloy energy dissipation connecting plate 2, and the electrode groups 32 arranged at intervals along the distribution path of the shape memory alloy fibers 03, the approximate area where cracks appear can be initially determined through the numerical change of the resistance value in the area, and the voltage and current are adjusted according to the preset parameters for the area with abnormal resistance value to achieve the attraction of the fibers, so as to realize the crack monitoring and self-healing functions for the grouting area. The intelligent monitoring mechanism provides a basis for the subsequent evaluation and optimization of the repair effect by recording and analyzing various data during the crack monitoring and fiber attraction processes.

[0058] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A compression-resistant connection device for annular seams of lining segments, characterized in that: It 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), the adaptive energy dissipation connection structure comprising 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), the shape memory alloy energy dissipation connection plate (2) being provided across between the adjacent lining segments (01); 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); The energy dissipation 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 dissipation 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; 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); 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); 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).

2. The compression-resistant connection device according to claim 1, 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.

3. The compression-resistant connection device according to claim 1, characterized in that: It also includes an intelligent monitoring mechanism for monitoring concrete damage in the installation groove (05) and for repairing damage cracks.

4. The compression-resistant connection device according to claim 3, 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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