Multi-target cross-fault high-speed rail tunnel damping structure system and construction method

Abstract

The invention provides a multi-target cross-fault high-speed rail tunnel damping structure system and a construction method, and belongs to the technical field of cross-fault high-speed rail tunnel damping. Comprising a fault fracture zone section, fracture zone influence zones are arranged on the two sides of the fault fracture zone section, common sections are arranged on the sides, away from the fault fracture zone section, of the fracture zone influence zones, a sliding fault surface is arranged at the center axis position of the fault fracture zone section, and an over-excavation section and a hinge design are arranged in the fault fracture zone section. According to the damping structure system, the structural safety and functions of a tunnel and a track under the small fault displacement are guaranteed through an over-excavation means and variable stiffness filling, the structural safety of the tunnel under the large fault displacement is guaranteed through an annular flexible connecting section, the pressure of the top of the tunnel is dispersed in the direction away from the tunnel through a supporting mechanism, and the stability of the device is improved; the supporting mechanism enables the supporting performance of the device to be better, the supporting mechanism has certain elastic deformation capacity, the anti-dislocation capacity of the device is better, and space is provided for follow-up repairing.

Description

Technical Field

[0001] The present invention relates to the technical field of cross-fault high-speed railway tunnel shock absorption, and in particular to a multi-objective cross-fault high-speed railway tunnel shock absorption structure system and a construction method. Background Art

[0002] Tunnels are surrounded by strata. When an earthquake occurs, underground structures move with the surrounding rock. It is generally believed that earthquakes have little impact on underground structures (open and dark tunnels, stations). It was not until the Great Hanshin Earthquake in 1995 that people realized the possibility of earthquake damage to underground tunnels. Therefore, necessary measures should be taken in the design and construction of tunnels. In order to meet the aerodynamic requirements of high-speed traffic, the technical standards of tunnel clearance effective area, cross-sectional form, structural strength, etc. are significantly higher than those of conventional railway tunnels. In order to ensure high smoothness and high stability, a ballastless track structure with large overall stiffness is usually adopted. However, under the action of fault dislocation, the upper and lower plate rock and soil will produce complex three-dimensional spatial deformation, with tension (compression), shear, bending and other stress forms. Tunnels crossing the fault zone will produce serious deformation, cracking and even damage. In addition to the possibility of earthquake damage to the lining structure, high-speed railway tunnels are also prone to damage to the track structure, which seriously affects the efficiency of earthquake relief and post-earthquake restoration.

[0003] At present, the anti-seismic measures commonly used in tunnels include grouting to reinforce surrounding rocks, setting up shock-absorbing layers, cross-section excavation design, and structural articulation design. Grouting reinforcement may be limited by factors such as the original structure of the surrounding rock, cracks, and hydrogeological conditions. In addition, there may still be local weak areas in the surrounding rock after grouting, and the risk of geological disasters cannot be completely solved. The shock-absorbing effect of the shock-absorbing layer is affected by factors such as the material, thickness, and layout of the shock-absorbing layer. The excavation of the cross-section excavation design will increase the construction difficulty and engineering cost, and may lead to changes in the original geological conditions and increase the risk of geological disasters. The structural articulation design requires precise design and construction control, and may introduce maintenance and repair problems after structural deformation. Therefore, the present application provides a multi-objective cross-fault high-speed railway tunnel shock-absorbing structure system and construction method to meet the needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a multi-objective cross-fault high-speed railway tunnel shock-absorbing structural system and construction method. By setting a supporting mechanism, not only can the pressure on the top of the tunnel be dispersed away from the tunnel, thereby achieving the effect of increasing the stability of the device, but the supporting mechanism also makes the device more supportive, and the supporting mechanism itself also has a certain elastic deformation capacity, which further makes the device more resistant to dislocation. The above settings can solve the problems of poor geological disaster resistance and difficult repair of existing devices.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A multi-objective cross-fault high-speed railway tunnel shock-absorbing structure system, comprising a fault crushing zone section, crushing zone influence zones are arranged on both sides of the fault crushing zone section, a common section is arranged on the side of the crushing zone influence zone away from the fault crushing zone section, a sliding fault plane is arranged at the central axis position of the fault crushing zone section, an over-excavation section is arranged in the fault crushing zone section, a filling layer frame is arranged in the over-excavation section, an initial support is arranged in the filling layer frame, a segment lining is arranged in the initial support, an annular flexible connection section is arranged in the fault crushing zone section and the crushing zone influence zone, water stop strips are arranged on both sides of the annular flexible connection section, the stiffness of the filling layer frame is different in the direction of the over-excavation section, and the deformation joints of two adjacent groups of the segment linings are connected by the annular flexible connection section; a support mechanism, the support mechanism is used to strengthen the supporting force of the device and achieve further compression resistance and shock reduction effect, and the support mechanism is connected to the filling layer frame.

[0007] Optionally, the filling layer frame is provided with a plurality of areas along the lateral direction of the over-excavation section, and the partition position is determined according to the specific stress distribution and force requirements of the tunnel structure. The stiffness of the filling layer frames in different areas is different, and rubber sprayed concrete is provided in the filling layer frame. In areas with concentrated stress and small deformation, a filling layer with a high elastic modulus is used; in areas with small stress but large deformation, a filling layer with a low elastic modulus is used, and the annular flexible connecting sections are arranged at unequal intervals.

[0008] Optionally, the supporting mechanism includes a supporting plate installed on the filling layer rack, the bottom of the supporting plate is annularly and equidistantly fixedly connected with supporting columns, the two side ends of the supporting plate are provided with ends, and the top of the annular flexible connecting section is fixedly connected with a connecting piece with a shape matching the end.

[0009] Optionally, the support plate is in an arc shape with a convex middle, the edges of the ends are in arc shape, the support plate and the support column are made of steel, and concrete is poured between the support plate and the support column.

[0010] Optionally, the connecting piece is a concave arc-shaped plate, a guide portion is provided at the end of the connecting piece, a first weakened portion is provided on the connecting piece close to the guide portion, and the connecting piece and the annular flexible connecting section are integrally formed.

[0011] Optionally, a reinforcement component is provided in the filling layer frame, and the reinforcement component includes a first support plate installed on the filling layer frame, the first support plates are arranged in multiple groups equidistantly on the top of the filling layer frame, the bottoms of the two most side first support plates are fixedly connected to third support plates, the bottoms of the third support plates are fixedly connected to elastic plates, the bottom of the filling layer frame is provided with a second thickened portion adapted to the shape of the elastic plate, and the bottom of the segment lining is provided with a first thickened portion adapted to the shape of the elastic plate.

[0012] Optionally, a second support sheet is installed between two adjacent groups of the first support sheets, the second support sheet is in an arc-shaped ring shape, and second weakened portions are equidistantly provided in a ring shape on the second support sheet.

[0013] Optionally, a fourth support plate is fixedly connected to the third support plate, a fifth support plate is fixedly connected to the third support plate, a sixth support plate is provided between two adjacent groups of fourth support plates, the cross-section of the sixth support plate is elliptical, the fourth support plate is in an arc shape that bulges away from the sixth support plate, and the fifth support plate is in an arc shape.

[0014] Optionally, third weakened portions are equidistantly provided on the elastic sheet, the cross section of the elastic sheet is a curved corrugated shape, raised portions and recessed portions are equidistantly provided on the elastic sheet, and two groups of raised portions of the elastic sheet are arranged opposite to each other.

[0015] Optionally, the construction method of the multi-objective cross-fault high-speed railway tunnel shock-absorbing structural system according to any one of claims is characterized by comprising the following steps:

[0016] Step 1: Excavate the fault fracture zone section, fracture zone influence zone, ordinary section and over-excavation section. Use inserted bars to connect the lining rings of different sections to ensure the force transmission and structural integrity between the lining rings. When excavating the tunnel structure of the ordinary section, due to the insufficient self-stabilization capacity of the surrounding rock, the excavation inner wall is promptly supported initially. Different support methods are selected according to the different conditions of the tunnel surrounding rock. The surface of the initial support is treated, waterproof board geotextile is laid, steel cage is tied, and the segment lining is constructed;

[0017] Step 2: Install support plates and support columns, and construct a filling frame in the tunnel clearance of the over-excavation section, close to the tunnel over-excavation contour line. The thickness of the filling frame is the same as the excavation depth of the over-excavation section. The inner side of the surrounding rock in the affected area of ​​the broken zone and the inner wall of the filling frame are filled. Different support methods are selected according to different conditions of the tunnel surrounding rock, the surface of the initial support is processed, the waterproof board geotextile is laid, and the steel cage is tied;

[0018] Step three: construct segmental linings, with deformation joints between adjacent segmental linings, and adjacent segmental linings are connected by an annular flexible connecting section, and the connecting piece on the top of the annular flexible connecting section is installed and connected to the end on the support plate, and the annular flexible connecting section is arranged at unequal intervals in the fault fracture zone section and the fracture zone influence area; the reinforcement component is installed in the cavity between the filling layer frame and the segmental lining from the side by insertion, and the rails are installed and fixed, and a waterstop is arranged on the water-facing surface formed between the segmental lining and the annular flexible connecting section.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] In the above scheme, by setting up a supporting mechanism, not only can the pressure on the top of the tunnel be dispersed away from the tunnel, thereby achieving the effect of increasing the stability of the device, but the supporting mechanism also makes the device more supportive, and the supporting mechanism itself also has a certain elastic deformation capacity, which further makes the device more resistant to dislocation, so that when the active fault undergoes a small dislocation, various uneven deformations of the tunnel structure can also be satisfied, providing space for subsequent repairs.

[0021] By providing a support plate in the support mechanism, the support plate can disperse the pressure received, and the strength and toughness of the steel material are good, which further makes the support plate cooperate with the support column to better effect, and after the support plate and the support column are installed, concrete is poured in the gap between the support plate and the support column to further improve the stability of the support plate, and the structure further makes the support mechanism better.

[0022] By providing a first support sheet and a second support sheet in the support mechanism, and adding a second support sheet between the first support sheets, the second support sheet plays an auxiliary supporting role for the first support sheet, and when the first support sheet and the second support sheet are subjected to strong pressure, the first support sheet is deformed along the arc surface, thereby squeezing the second support sheet, causing the second support sheet to deform from the second weakened portion, and at the same time, during the squeezing of the second support sheet, the outer wall of the second support sheet and the outer wall of the first support sheet generate strong friction, resulting in rapid force conversion, thereby further deepening the support and shock absorption effect of the top of the filling shelf, and the structure further makes the use effect of the support mechanism better.

[0023] By arranging an elastic sheet in the supporting mechanism, the elastic sheet at the bottom of the filling layer rack is subjected to the force and fluctuates, and the elastic sheet first deforms from the third weakened portion, so that the raised portion of the elastic sheet moves in the grooves provided in the first thickened portion and the second thickened portion. During this period, the elastic sheet and the first thickened portion and the second thickened portion respectively generate strong friction forces, and the elastic sheet itself generates strong restorative elastic force. The rapid conversion of the two forces can have a good shock-absorbing effect on the filling layer rack, and the two groups of elastic sheets contact and interact with each other when the force is large, which further improves the support and shock-absorbing effects of the device.

[0024] In summary, the device is provided with an over-excavation section, and a filling layer frame is arranged in the over-excavation section, so as to realize the difference in relative stiffness between soil and structure in different excavation areas, and then adjust the displacement mode of the tunnel to make its curvature smaller and more uniform, which is more in line with the traffic function of the line, and ensures the structural safety and function of the tunnel and track under small fault displacement. In addition, the thickness of the filling layer frame matches the excavation depth of the over-excavation section, ensuring that the shape and size of the tunnel segment lining of the over-excavation section are consistent with the secondary lining of the normal passing section tunnel, and there is no problem of sudden expansion or reduction of the cross section in ventilation; and the use of annular flexible connection sections on the tunnel structure further ensures the structural safety of the tunnel under large fault displacement; and the coordinated use of the support mechanism and the various components therein makes the device more supportive and has a stronger shock absorption effect. The device has a simple structure and good practicality, which is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0026] Figure 1 It is a three-dimensional structural diagram of the multi-objective cross-fault high-speed railway tunnel seismic reduction structure system and construction method;

[0027] Figure 2 for Figure 1 Schematic diagram of the structure along the AA cross section;

[0028] Figure 3 for Figure 1 Schematic diagram of the structure along the BB cross section;

[0029] Figure 4 It is a schematic diagram of the coordination between the annular flexible connection section and the water stop strip;

[0030] Figure 5 It is a three-dimensional structural diagram of the multi-objective cross-fault high-speed railway tunnel shock absorption structure and construction method;

[0031] Figure 6It is a schematic diagram of the three-dimensional structure of the annular flexible connecting section and the connecting piece;

[0032] Figure 7 It is a schematic diagram of the three-dimensional structure of the supporting plate and the annular flexible connecting section;

[0033] Figure 8 for Figure 7 The enlarged structural diagram at A in the middle;

[0034] Fig. 9 It is a schematic diagram of the three-dimensional structure of the support plate;

[0035] Fig.10 It is a schematic diagram of the three-dimensional structure of the annular flexible connecting section and the connecting piece;

[0036] Fig.11 It is a schematic diagram of the three-dimensional structure of the filling shelf;

[0037] Fig.12 for Fig.11 The enlarged structural diagram at B in the middle;

[0038] Fig.13 for Fig.11 The enlarged structural diagram at C in the middle;

[0039] Fig.14 for Fig.11 Enlarged structural diagram at D in the middle.

[0040] [Reference Signs]

[0041] 1. Fault fracture zone section; 2. Fracture zone influence zone; 3. Ordinary section; 4. Sliding fault surface; 5. Over-excavation section; 6. Filling layer frame; 7. Initial support; 8. Segment lining; 9. Annular flexible connection section; 10. Water stop strip; 11. Connecting plate; 12. Guide part; 13. First weakened part; 14. Support plate; 15. Support column; 16. End; 17. First support plate; 18. Second support plate; 19. Second weakened part; 20. Third support plate; 21. Fourth support plate; 22. Fifth support plate; 23. Sixth support plate; 24. First thickened part; 25. Second thickened part; 26. Elastic plate; 27. Third weakened part.

[0042] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0043] The following is a detailed description of a multi-objective cross-fault high-speed railway tunnel shock-absorbing structure system and construction method provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0044] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0045] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0046] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0047] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0048] like Figures 1 to 4As shown, an embodiment of the present invention provides a multi-objective cross-fault high-speed railway tunnel shock-absorbing structure system, including a fault fracture zone section 1, fracture zone influence zones 2 are arranged on both sides of the fault fracture zone section 1, a common section 3 is arranged on the side of the fracture zone influence zone 2 away from the fault fracture zone section 1, a sliding fault surface 4 is arranged at the central axis position of the fault fracture zone section 1, an over-excavation section 5 is arranged in the fault fracture zone section 1, a filling layer frame 6 is arranged in the over-excavation section 5, an initial support 7 is arranged in the filling layer frame 6, a segment lining 8 is arranged in the initial support 7, an annular flexible connection section 9 is arranged in the fault fracture zone section 1 and the fracture zone influence zone 2, water stop strips 10 are arranged on both sides of the annular flexible connection section 9, and the stiffness of the filling layer frame 6 in the direction of the over-excavation section 5 is increased. Different, the deformation joints of two adjacent groups of segment linings 8 are connected by an annular flexible connection section 9. The support mechanism is used to strengthen the support force of the device and achieve further compression and shock absorption effects. The support mechanism is connected to the filling layer frame 6. When a fault dislocation occurs, the surrounding rock of the fault fracture zone section 1 is dislocated along the sliding fault surface 4. The stiffness of the filling layer frame 6 arranged in the over-excavation section 5 is inconsistent in the direction of the over-excavation section 5, and variable stiffness is achieved; initial support 7 is set between the surrounding rock and the secondary lining of the ordinary section 3 and the fracture zone influence area 2, and initial support 7 is set between the filling layer frame 6 and the segment lining 8. The joint between the segment lining 8 and the annular flexible connection section 9 forms a water-facing surface, and a water stop strip 10 is set on the water-facing surface. In the absence of anti-fracture measures, the displacement of the tunnel on the sliding surface is the fault displacement, and the displacement mode jumps in a "step-like" manner, resulting in shear damage to the tunnel. The over-excavation section 5 provided in the device adopts over-excavation means so that the fault plane cannot directly act on the tunnel, and the displacement mode changes. Considering that the deformation curvature is large and uneven, the device arranges a filling layer frame 6 in the over-excavation section 5 to realize the difference in relative stiffness between the soil and the structure in different regions, and then adjusts the displacement mode of the tunnel to make its curvature smaller and more uniform, which is more in line with the traffic function of the line. When the displacement continues to increase, the annular flexible connection section 9 is used on the tunnel structure to ensure the structural safety. The shock-absorbing structural system of this embodiment ensures the structural safety and function of the tunnel and the track under small displacement of the fault through over-excavation means and variable stiffness filling, and ensures the structural safety of the tunnel under large displacement of the fault through the annular flexible connection section 9.

[0049] Further, the filling layer frame 6 is provided with multiple regions along the transverse direction of the over-excavation section 5, and the partition positions are determined according to the specific stress distribution and force requirements of the tunnel structure. The stiffness of the filling layer frame 6 in different regions is different. Rubber sprayed concrete is provided in the filling layer frame 6, wherein a filling layer with a high elastic modulus is used in the region with stress concentration and small deformation; a filling layer with a low elastic modulus is used in the region with small stress but large deformation. The annular flexible connecting sections 9 are arranged at unequal intervals, and the filling layer frame 6 is close to the contour line of the over-excavation section 5 and the outer side of the initial support 7, and is arranged around the initial support 7 as a whole. The filling layer frame 6 is provided with multiple regions along the transverse direction of the over-excavation section 5, and the partition positions are determined according to the specific stress distribution and force requirements of the tunnel structure, and the stiffness of different regions is different. Specifically, rubber sprayed concrete is provided in the region of the filling layer frame 6, and the stiffness of the rubber sprayed concrete in different regions is different, which is specifically manifested in that the material properties of different regions of the filling layer frame 6 are different. Further, the elastic modulus of the filling material in the filling layer frame 6 is different along the transverse direction of the over-excavation section 5. The filling layer frame 6 is composed of a filling material, which is rubber sprayed concrete. By adjusting the ratio of rubber to cement-based materials, the filling material has different stiffnesses. The filling layer frame 6 exhibits different elastic moduli along the lateral direction of the over-excavation section 5. When the active fault has a small displacement, the filling layer frame 6 is first compressed; since the elastic modulus of the filling layer frame 6 is small, and the elastic modulus of the filling material in the filling layer frame 6 located inside the over-excavation section 5 is different, the relative stiffness of the soil and the structure is different, and then the displacement mode of the tunnel is adjusted to make its curvature smaller and more uniform, which is more in line with the traffic function of the line; the filling layer frame 6 can bear a certain pressure, and the filling layer frame 6 undergoes compression deformation to become a buffer layer between the soil and the initial support 7, protecting the safety of the tunnel structure and taking into account the track function. The excavation depth of the over-excavation section 5 is adapted to the thickness of the filling layer frame 6, so that the shape and size of the segmental lining 8 of the over-excavation section 5 are the same as the secondary lining of the normal through-section tunnel. Therefore, there is no sudden expansion or reduction of the cross-section in ventilation; at the same time, when the active fault undergoes a small displacement, various uneven deformations of the tunnel structure can also be met, providing space for subsequent repairs.

[0050] Furthermore, the initial support 7 is arranged between the surrounding rock and the secondary lining of the ordinary section 3 and the broken zone influence zone 2, and between the filling layer frame 6 and the segment lining 8, that is, it surrounds the secondary lining structure in an annular direction. The segment lining 8 is arranged on the inner side of the initial support 7, and the shape and size of the segment lining 8 are the same as those of the secondary lining of the normal through section tunnel. When the active fault has a large displacement, the annular flexible connecting section 9 is arranged near the fault broken zone section 1, and the axial stiffness of the tunnel structure is reduced by segmenting the lining structure along the longitudinal direction, and the earthquake damage is induced to the joints, thereby protecting the main structure of the tunnel. The segment length has a significant effect on the tunnel's anti-dislocation effect. In this embodiment, the arrangement spacing of the annular flexible connecting section 9 in the fault broken zone section 1 is smaller than the arrangement spacing in the broken zone influence zone 2, so that the tunnel structure can better adapt to deformation. The setting of the water stop 10 further improves the tightness of the connection between the segment lining 8 and the annular flexible connecting section 9, and increases the waterproof effect of the device.

[0051] like Figures 5 to 10 As shown, the support mechanism includes a support plate 14 installed on the filling layer frame 6, the bottom of the support plate 14 is annularly and equidistantly fixedly connected with support columns 15, the two side ends of the support plate 14 are provided with end portions 16, and the top of the annular flexible connecting section 9 is fixedly connected with a connecting piece 11 whose shape matches the end portion 16. The support plate 14 in the support mechanism can support and protect the fault fracture zone section 1 and the fracture zone influence zone 2, and the shape of the support plate 14 is used to disperse the pressure on the top of the tunnel away from the tunnel, thereby achieving the effect of increasing the stability of the device. The setting of the support column 15 fixedly connected in the support plate 14, The correlation between the support plate 14 and the filling layer frame 6 is increased, and the bottom of the support column 15 is against the outer wall of the filling layer frame 6, so that the sliding fault surface 4 cooperates with the use of the support column 15 to further improve the support performance of the support plate 14, and the two side ends of the support plate 14 are connected to the annular flexible connecting section 9, and the filling layer frame 6 and the annular flexible connecting section 9 are both made of elastic material, and the support plate 14 itself also has a certain elastic deformation ability. The coordinated use of the three further improves the device's anti-dislocation ability, and the setting of the connecting piece 11 and the end 16 enables the annular flexible connecting section 9 and the support plate 14 to be connected and fixed together more quickly.

[0052] Furthermore, the support plate 14 is in the shape of an arc with a raised center, the edge of the end 16 is in the shape of an arc, the support plate 14l and the support column 15 are made of steel, concrete is poured between the support plate 14 and the support column 15, the connecting piece 11 is a concave arc plate, the end of the connecting piece 11 is provided with a guide portion 12, the connecting piece 11 is provided with a first weakened portion 13 close to the guide portion 12, the connecting piece 11 and the annular flexible connecting section 9 are integrally formed, and the effect of the support plate 14 on dispersing the pressure is further increased by designing the support plate 14 into an arc shape with a raised center, and the strength and toughness of the steel material are good, which further makes the use effect of the support plate 14 and the support column 15 better, and after the installation of the support plate 14 and the support column 15 and on the support plate 1 4 and the support column 15 are poured with concrete to further improve the stability of the support plate 14. The shape design of the connecting piece 11 is adapted to the end 16, so that the connection between the connecting piece 11 and the end 16 is tighter, and the end 16 can be more quickly squeezed into the groove formed by the connecting piece 11 by using the guidance of the guide portion 12, and the first weakened portion 13 is deformed when being squeezed, so that the guide portion 12 is expanded, so that the installation of the end 16 is faster, and after the connection between the connecting piece 11 and the end 16 is completed, the restorative elastic force generated by the connecting piece 11 always produces an extrusion effect on the end 16, and the connecting piece 11 and the end 16 are not easy to separate during use, and the stability of the annular flexible connecting section 9 and the connecting piece 11 formed in one piece is better.

[0053] like Figures 11 to 14As shown, a reinforcement component is provided in the filling layer frame 6, and the reinforcement component includes a first support sheet 17 installed on the filling layer frame 6, and the first support sheets 17 are multiple groups equidistantly arranged on the top of the filling layer frame 6, and the bottoms of the two most side first support sheets 17 are fixedly connected with third support sheets 20, and the bottoms of the third support sheets 20 are fixedly connected with elastic sheets 26, and the bottom of the filling layer frame 6 is provided with a second thickened portion 25 adapted to the shape of the elastic sheet 26, and the bottom of the segment liner 8 is provided with a first thickened portion 24 adapted to the shape of the elastic sheet 26. By arranging the reinforcement component in the filling layer frame 6, the stability of the filling layer frame 6 is further improved, and according to the different stress conditions of each part in the filling layer frame 6, the components in the reinforcement component are distinguished. For example, the multiple groups of first support sheets 17 arranged on the top of the filling layer frame 6 are The triangle has better stability and can make the supporting strength of the top of the filling layer frame 6 better. The third supporting pieces 20 arranged on both sides of the filling layer frame 6 are arranged longitudinally. This structure can further enhance the longitudinal supporting force of the filling layer frame 6, and the elastic piece 26 arranged at the bottom of the filling layer frame 6 is fixedly connected to the third supporting piece 20, so that when the structure is vibrated, the deformation generated by the elastic piece 26 and the friction generated between the elastic piece 26 and the first thickened part 24 and the second thickened part 25 during the deformation process are utilized, and the restorative elastic force and the friction force generated by the deformation are quickly converted, so that the filling layer frame 6 can achieve a good anti-seismic effect, and cooperate with the elastic filler in the filling layer frame 6 to further improve the supporting and anti-seismic properties of the filling layer frame 6, and the structure is relatively simple, and it is convenient and quick to use.

[0054] Further, a second support sheet 18 is installed between two adjacent groups of first support sheets 17, the second support sheet 18 is an arc-shaped ring, and a second weakened portion 19 is equidistantly provided in an annular shape on the second support sheet 18, a fourth support sheet 21 is fixedly connected to the third support sheet 20, and a fifth support sheet 22 is fixedly connected to the third support sheet 20, a sixth support sheet 23 is provided between two adjacent groups of fourth support sheets 21, the cross section of the sixth support sheet 23 is an elliptical shape, the fourth support sheet 21 is an arc shape convex in the direction away from the sixth support sheet 23, the fifth support sheet 22 is an arc shape, and a third weakened portion 27 is equidistantly provided on the elastic sheet 26, the cross section of the elastic sheet 26 is a curved corrugated shape, and protrusions and recesses are equidistantly provided on the elastic sheet 26, and the protrusions of the two groups of elastic sheets 26 are arranged opposite to each other, By adding a second support sheet 18 between the first support sheets 17, the second support sheet 18 plays an auxiliary supporting role for the first support sheet 17, and when the first support sheet 17 and the second support sheet 18 are subjected to strong pressure, the first support sheet 17 is deformed along the arc surface, thereby squeezing the second support sheet 18, causing the second support sheet 18 to deform from the second weakened portion 19. At the same time, during the squeezing of the second support sheet 18, the outer wall of the second support sheet 18 and the outer wall of the first support sheet 17 generate strong friction, resulting in rapid force conversion, thereby further deepening the support and shock absorption effects of the top of the filling shelf 6. At the same time, when the first support sheet 17 and the second support sheet 18 are used in conjunction, the lateral support effect of the filling shelf 6 is better. The fourth support sheet 21 and the fifth support sheet 22 fixedly connected on the third support sheet 20 enable the two groups of adjacent third support sheets 20 to cooperate with each other, and connect the third support sheet 20 with the segment lining 8 of the filling layer frame 6. When subjected to pressure, the third support sheet 20 produces longitudinal deformation, and the fourth support sheet 21 and the fifth support sheet 22 produce transverse deformation under force. The filling layer frame 6 and the segment lining 8 limit the reinforcement component, so that the area between the filling layer frame 6 and the segment lining 8 changes when the entire reinforcement component is subjected to force. When the third support sheet 20, the fourth support sheet 21 and the fifth support sheet 22 are used in cooperation, the longitudinal support effect of the filling layer frame 6 is better. The addition of the sixth support sheet 23 squeezes the sixth support sheet 23 when the third support sheet 20 and the fourth support sheet 21 are deformed, and the restorative force of the sixth support sheet 23 further increases the support effect of the third support sheet 20.The two groups of elastic sheets 26 are respectively inserted into the grooves equidistantly opened in the first thickened part 24 and the second thickened part 25. When subjected to the deformation effect of the first support sheet 17 and the third support sheet 20, the elastic sheet 26 at the bottom of the filling layer frame 6 is subjected to the force and fluctuates. The elastic sheet 26 first deforms from the third weakened part 27, so that the raised part of the elastic sheet 26 moves in the grooves opened in the first thickened part 24 and the second thickened part 25. During this period, the elastic sheet 26 and the first thickened part 24 and the second thickened part 25 respectively generate strong friction forces, and the elastic sheet 26 itself generates strong restorative elastic force. The rapid conversion of the two forces can have a good shock-absorbing effect on the filling layer frame 6, and the two groups of elastic sheets 26 contact and interact with each other when subjected to large forces, which further improves the support and shock-absorbing effects of the device, and the structure further improves the practicality of the device.

[0055] The working principle of the technical solution provided by the present invention is as follows: when in use, first, before tunnel construction, an in-depth on-site investigation is conducted, including geological and hydrological surveys, and different construction plans are designed and implemented according to different geological and hydrological conditions. Then, the tunnel structures of the fault fracture zone section 1, the fracture zone impact zone 2, the ordinary section 3 and the over-excavation section 5 are excavated, and the joints of the lining rings of different sections are connected by inserted bars to ensure the force transmission and structural integrity between the lining rings. When excavating the ordinary section 3, due to the insufficient self-stabilizing ability of the surrounding rock, the initial support 7 of the excavated inner wall is carried out in time, and different support methods are selected according to different conditions of the tunnel surrounding rock, the surface of the initial support 7 is processed, the waterproof board geotextile is laid, the steel cage is tied, and the segment lining 8 is constructed. Then, support plates 14 and support columns 15 are installed in the fault fracture zone section 1 and the fracture zone influence zone 2. After installation, a filling frame 6 is placed in the tunnel clearance of the over-excavation section 5, close to the tunnel over-excavation contour line. The thickness of the filling frame 6 is the same as the excavation depth of the over-excavation section 5, and the bottom of the support column 15 is closely fitted to the outer wall of the filling frame 6. Subsequently, initial support 7 is carried out on the inner side of the surrounding rock of the ordinary section 3, the inner side of the surrounding rock of the fracture zone influence zone 2, and the inner wall of the filling frame 6. Different support methods are selected according to different conditions of the tunnel surrounding rock, the surface of the initial support 7 is processed, waterproof board geotextile is laid, and steel cages are tied. Then, the segment lining 8 is constructed, the filling frame 6 and the segments are installed and fixed, and then the first support sheet 17, the second support sheet 18, the third support sheet 20, the fourth support sheet 21, the fifth support sheet 22, the sixth support sheet 23, and the elastic sheet 26 are inserted into the large cavity between the filling frame 6 and the segment lining 8 from the side of the filling frame 6, and the first support sheet 17 and the second support sheet 18 are located at the top of the filling frame 6, and the third support sheet 20, the fourth support sheet 21, the fifth support sheet 22 and the sixth support sheet 23 are located on both sides of the filling frame 6, and the elastic sheet 26 is inserted into the large cavity between the filling frame 6 and the segment lining 8 from the side of the filling frame 6. 26 is located at the bottom of the filling layer frame 6, and the two groups of elastic sheets 26 are closely fitted with the first thickened part 24 and the second thickened part 25 respectively, and the first support sheet 17, the second support sheet 18, the third support sheet 20, the fourth support sheet 21, the fifth support sheet 22, the sixth support sheet 23, the elastic sheet 26 and other structures are closely fitted with the segment lining 8 of the filling layer frame 6, and there are deformation seams between adjacent segment linings 8. Adjacent segment linings 8 are connected by annular flexible connecting sections 9, and the annular flexible connecting sections 9 are arranged at unequal intervals in the fault fracture zone section 1 and the fracture zone influence zone 2.The two groups of annular flexible connecting segments 9 farthest from the fault fracture zone segment 1 are fixedly connected with connecting pieces 11. When installing the two groups of annular flexible connecting segments 9, the connecting pieces 11 and the ends 16 of the two ends of the annular flexible connecting segments 9 are aligned. With the guidance of the guide portion 12, the ends 16 can be squeezed into the groove formed by the connecting pieces 11 more quickly, and the first weakened portion 13 is deformed when squeezed, so that the guide portion 12 expands, thereby making the installation of the ends 16 faster. After the connection between the connecting pieces 11 and the ends 16 is completed, the restorative elastic force generated by the connecting pieces 11 always produces an extrusion effect on the ends 16, and the shape design of the connecting pieces 11 is adapted to the ends 16, so that the connection between the connecting pieces 11 and the ends 16 is tight. Finally, a back-sticking waterstop 10 is arranged on the water-facing surface formed between the segment lining 8 and the annular flexible connecting segment 9. The device is not only simple in structure, but also convenient and quick to use.

[0056] Among them, geological radar, geological detection drilling and geological advance prediction are used to accurately predict the geological conditions in front of the tunnel. The shape and size of the tunnel excavation surface are monitored in real time using precision instruments such as total stations and laser scanners. In addition, the step method is used for excavation of weak surrounding rocks. When the surrounding rock is very poor, the distributed excavation method is considered. When the surrounding rock has good integrity and undeveloped joints, the full-section excavation is used. At the same time, slag is removed and dangerous rocks are cleared in time during excavation. Support methods include anchor support, shotcrete support, anchor-sprayed combined support, shotcrete steel mesh combined support, etc. Among them, the process of installing the waterstop 10 includes: first, cleaning the position where the waterstop 10 is to be installed to ensure that the surface is flat, dry and free of impurities; second, applying a layer of sealing glue at the end of the waterstop 10, and placing the waterstop 10 at the joint between the segment lining 8 and the annular flexible connection section 9.

[0057] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0058] 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 principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A multi-objective cross-fault high-speed railway tunnel seismic reduction structure system, characterized in that: It comprises a fault fracture zone section, fracture zone influence zones are arranged on both sides of the fault fracture zone section, a common section is arranged on the side of the fracture zone influence zone far from the fault fracture zone section, a sliding fault plane is arranged at the central axis position of the fault fracture zone section, an over-excavation section is arranged in the fault fracture zone section, a filling layer frame is arranged in the over-excavation section, an initial support is arranged in the filling layer frame, a segment lining is arranged in the initial support, an annular flexible connection section is arranged in the fault fracture zone section and the fracture zone influence zone, water stop strips are arranged on both sides of the annular flexible connection section, the stiffness of the filling layer frame is different in the direction of the over-excavation section, and the deformation joints of two adjacent groups of the segment linings are connected by the annular flexible connection section; A supporting mechanism is used to strengthen the supporting force of the device and achieve further compression resistance and shock absorption effects, and the supporting mechanism is connected to the filling layer frame.

2. The multi-objective cross-fault high-speed railway tunnel seismic reduction structure system according to claim 1 is characterized in that: The filling layer frame is provided with multiple areas along the transverse direction of the over-excavation section, and the partition positions are determined according to the specific stress distribution and force requirements of the tunnel structure. The stiffness of the filling layer frames in different areas is different. Rubber sprayed concrete is provided in the filling layer frame, and a filling layer with a high elastic modulus is used in the area with concentrated stress and small deformation; In the area with smaller stress but larger deformation, a filling layer with a low elastic modulus is used, and the annular flexible connecting sections are arranged at unequal intervals.

3. The multi-objective cross-fault high-speed railway tunnel seismic reduction structural system according to claim 1 is characterized in that: The support mechanism includes a support plate installed on the filling layer frame, the bottom of the support plate is annularly and equidistantly fixedly connected with support columns, the two side ends of the support plate are provided with ends, and the top of the annular flexible connecting section is fixedly connected with a connecting piece with a shape matching the end.

4. The multi-objective cross-fault high-speed railway tunnel seismic reduction structural system according to claim 3 is characterized in that: The support plate is in an arc shape with a convex middle, and the edges of the ends are in arc shape. The support plate and the support column are made of steel, and concrete is poured between the support plate and the support column.

5. The multi-objective cross-fault high-speed railway tunnel seismic reduction structural system according to claim 3 is characterized in that: The connecting piece is a concave arc-shaped plate, a guide portion is provided at the end of the connecting piece, a first weakened portion is provided on the connecting piece close to the guide portion, and the connecting piece and the annular flexible connecting section are integrally formed.

6. The multi-objective cross-fault high-speed railway tunnel seismic reduction structural system according to claim 3 is characterized in that: A reinforcement component is provided in the filling layer frame, and the reinforcement component includes a first support plate installed on the filling layer frame, the first support plates are arranged in multiple groups equidistantly on the top of the filling layer frame, the bottoms of the two most sides of the first support plates are fixedly connected to third support plates, the bottoms of the third support plates are fixedly connected to elastic plates, the bottom of the filling layer frame is provided with a second thickened portion adapted to the shape of the elastic plate, and the bottom of the segment lining is provided with a first thickened portion adapted to the shape of the elastic plate.

7. The multi-objective cross-fault high-speed railway tunnel seismic reduction structural system according to claim 6 is characterized in that: A second support sheet is installed between two adjacent groups of the first support sheets. The second support sheet is in an arc-shaped ring shape. Second weakened portions are equidistantly provided in a ring shape on the second support sheet.

8. The multi-objective cross-fault high-speed railway tunnel seismic reduction structural system according to claim 6 is characterized in that: A fourth support piece is fixedly connected to the third support piece, a fifth support piece is fixedly connected to the third support piece, a sixth support piece is provided between two adjacent groups of fourth support pieces, the cross-section of the sixth support piece is elliptical, the fourth support piece is in an arc shape convex away from the sixth support piece, and the fifth support piece is in an arc shape.

9. The multi-objective cross-fault high-speed railway tunnel seismic reduction structural system according to claim 6, characterized in that: The elastic sheet is provided with third weakened portions at equal intervals, the cross section of the elastic sheet is a curved corrugated shape, the elastic sheet is provided with raised portions and recessed portions at equal intervals, and two groups of raised portions of the elastic sheet are arranged opposite to each other.

10. The construction method of the multi-objective cross-fault high-speed railway tunnel shock-absorbing structure system according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: excavate the fault fracture zone section, fracture zone influence zone, ordinary section and over-excavation section. The joints of the lining rings of different sections are connected by inserting bars to ensure the force transmission and structural integrity between the lining rings. When excavating the tunnel structure of the ordinary section, due to the insufficient self-stabilizing capacity of the surrounding rock, the excavated inner wall is promptly supported initially. Different support methods are selected according to different conditions of the tunnel surrounding rock. The surface of the initial support is processed, waterproof board geotextile is laid, steel cage is tied, and the segment lining is constructed; Step 2: Install support plates and support columns, and construct a filling frame in the tunnel clearance of the over-excavation section, close to the tunnel over-excavation contour line. The thickness of the filling frame is the same as the excavation depth of the over-excavation section. The inner side of the surrounding rock in the affected area of ​​the broken zone and the inner wall of the filling frame are filled. Different support methods are selected according to different conditions of the tunnel surrounding rock, the surface of the initial support is processed, the waterproof board geotextile is laid, and the steel cage is tied; Step three: construct segmental linings, with deformation joints between adjacent segmental linings, and adjacent segmental linings are connected by an annular flexible connecting section, and the connecting piece on the top of the annular flexible connecting section is installed and connected to the end on the support plate, and the annular flexible connecting section is arranged at unequal intervals in the fault fracture zone section and the fracture zone influence area; the reinforcement component is installed in the cavity between the filling layer frame and the segmental lining from the side by insertion, and the rails are installed and fixed, and a waterstop is arranged on the water-facing surface formed between the segmental lining and the annular flexible connecting section.

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