Overhead laying buttress for oil and gas pipeline tunnel to pass through movable fault zone

Abstract

The invention discloses an overhead laying buttress for an oil and gas pipeline tunnel to pass through a movable fault zone, which belongs to the technical field of oil and gas transmission and comprises a first supporting layer, a second supporting layer and a damping layer. The first supporting layer is connected with a tunnel bottom plate, the second supporting layer is connected with an oil and gas pipeline, and the damping layer is connected between the first supporting layer and the second supporting layer. A plurality of elastic supporting structures are arranged in the damping layer; the end, close to the second supporting layer, of the elastic supporting structure protrudes out of the damping layer and is connected with the second supporting layer. A first sliding plate is arranged at the end, close to the first supporting layer, of the elastic supporting structure, a second sliding plate is arranged at the position, corresponding to the first sliding plate, of the first supporting layer, and the first sliding plate and the second sliding plate are in contact and can slide relatively. The damping and anti-dislocation capabilities of the structure are improved, and the damage degree of the oil and gas pipeline under the action of seismic oscillation and fault dislocation can be reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the field of oil and gas pipeline tunnel crossing active fault zones, in particular to an oil and gas pipeline tunnel crossing active fault zones overhead laying support pier. BACKGROUND

[0002] Tunnel crossing active fault zones is a difficult problem in the field of engineering anti-seismic, and the specification requires that tunnel engineering crossing active fault zones should be specially studied. For oil and gas pipeline tunnel engineering, the bypassing method is often used to avoid crossing. In 2022, due to the complex terrain and dense fault zones of the Guozigou strategic channel project, the line cannot be bypassed, so the tunnel engineering of the project becomes the first tunnel crossing active fault zones in the oil and gas pipeline industry.

[0003] The overhead laying of oil and gas pipelines in tunnels is usually supported by concrete piers. This support method has the following disadvantages when crossing active fault zones: ① the concrete pier is rigidly connected with the tunnel floor, and the seismic action is transmitted to the oil and gas pipeline through the tunnel floor and the concrete pier, which is not conducive to the safe operation of the oil and gas pipeline. ② The active fault zone has the risk of stick-slip dislocation under the action of earthquake, at this time the tunnel structure near the fault fracture surface deforms, and the concrete pier also has relative displacement, resulting in buckling damage of the pipeline. SUMMARY

[0004] The application provides an oil and gas pipeline tunnel crossing active fault zones overhead laying support pier, which aims to solve the problem of prominent seismic response and weak anti-dislocation ability of the existing overhead laying support pier when passing through active fault zones.

[0005] The application provides an oil and gas pipeline tunnel crossing active fault zones overhead laying support pier, which includes a first support layer, a second support layer and a shock absorption layer.

[0006] The first support layer is connected with the tunnel floor, the second support layer is connected with the oil and gas pipeline, and the shock absorption layer is connected between the first support layer and the second support layer.

[0007] The shock absorption layer is internally provided with a plurality of elastic support structures; one end of the elastic support structure close to the second support layer protrudes from the shock absorption layer and is connected with the second support layer.

[0008] One end of the elastic support structure close to the first support layer is provided with a first sliding plate, and the first support layer is provided with a second sliding plate at a position corresponding to the first sliding plate, the first sliding plate and the second sliding plate are in contact and can slide relative to each other.

[0009] Through the technical scheme, the damping layer is arranged between the first support layer and the second support layer, the damping capacity of the structure is greatly improved, the plurality of elastic support structures are arranged in the damping layer, the structural stability is enhanced, a large load can be borne in an earthquake, and the seismic energy can be absorbed through elastic deformation; the first sliding plate and the second sliding plate are arranged, the first sliding plate and the second sliding plate can slide relative to each other when a fault dislocation occurs, the pier has the ability of sliding along the tunnel axial direction and the transverse direction, and the anti-dislocation capacity of the structure is improved.

[0010] Optionally, the elastic support structure comprises a first elastic deformation part and a plurality of second elastic deformation parts, and the plurality of second elastic deformation parts are uniformly distributed inside the first elastic deformation part.

[0011] Optionally, the first elastic deformation part comprises a rubber block, and the rubber block is vulcanization connected with the first sliding plate.

[0012] Through the technical scheme, the first elastic deformation part comprises a rubber block, the rubber is a super-elastic material and has strong deformation capacity, the seismic energy can be absorbed through deformation when the rubber block is subjected to a seismic force, and the damping capacity of the structure is improved; the rubber block is vulcanization connected with the first sliding plate, and the stability and reliability of the connection are ensured.

[0013] Optionally, the second elastic deformation part comprises a memory alloy rod, and the memory alloy rod is arranged perpendicularly to the plane on which the first sliding plate is arranged.

[0014] Through the technical scheme, the memory alloy rod has high strength and super-elasticity, can bear a large load and deformation, can absorb seismic energy, and can quickly restore the original shape, which is helpful for dissipating seismic energy and restoring the deformation of the pier.

[0015] Optionally, a groove is formed in the side of the first support layer facing the damping layer, and the second sliding plate is arranged inside the groove; and the size of the groove is greater than the size of the first sliding plate.

[0016] Through the technical scheme, the sliding range of the first sliding plate is further limited by arranging the groove, so that the first sliding plate can slide in the groove area when the first sliding plate and the second sliding plate slide relative to each other.

[0017] Optionally, the number of the elastic support structures is four, and the four elastic support structures are uniformly distributed at four corners of the damping layer.

[0018] Through the technical scheme, the four elastic support structures are uniformly distributed at the four corners of the damping layer, the stress distribution of the structure is uniform, and the stability of the structure is improved.

[0019] Optionally, a buffer pad layer is provided on the side of the second support layer facing the oil and gas pipeline.

[0020] The above technical solution, by setting a buffer pad layer, plays a buffering and shock-absorbing role between the second support layer and the oil and gas pipeline, further reducing the degree of damage to the oil and gas pipeline under the action of ground motion.

[0021] Optionally, the material of the cushioning layer includes rubber.

[0022] Optionally, the materials of the first support layer and the second support layer include concrete, and the material of the damping layer includes foamed concrete.

[0023] Through the above technical solution, the material of the damping layer includes foamed concrete. The porous structure inside the foamed concrete gives it a low elastic modulus, which has a good absorption and dispersion effect on impact loads, thereby reducing vibration transmission and improving the structure's damping capacity.

[0024] Optionally, a displacement gauge is also provided inside the shock-absorbing layer. The displacement gauge is connected to the first sliding plate and is used to detect the displacement data of the first sliding plate.

[0025] The above technical solution, by installing displacement gauges, allows for real-time monitoring of the displacement of the supports, enabling staff to take timely control measures to prevent pipeline damage.

[0026] Beneficial effects:

[0027] 1. This application provides an overhead support pier for an oil and gas pipeline tunnel crossing an active fault zone, comprising a first support layer, a second support layer, and a damping layer; the first support layer is connected to the tunnel floor, the second support layer is connected to the oil and gas pipeline, and the damping layer is connected between the first support layer and the second support layer; a plurality of elastic support structures are disposed inside the damping layer; one end of each elastic support structure protrudes from the damping layer and is connected to the second support layer near the second support layer; a first sliding plate is disposed at one end of each elastic support structure near the first support layer, and a second sliding plate is disposed on the first support layer at a position corresponding to the first sliding plate, the first sliding plate contacting the second sliding plate. This application significantly enhances the structure's vibration damping capacity by setting a damping layer between the first and second support layers. The damping layer incorporates multiple elastic support structures, enhancing structural stability and enabling it to withstand substantial loads during earthquakes. Furthermore, it absorbs seismic energy through elastic deformation. By incorporating a first and second sliding plate, relative sliding between them during fault slippage effectively reduces the relative displacement of the tunnel structure on the supports, thereby reducing the forced displacement transmitted to the oil and gas pipelines. This improves the structure's resistance to fault slippage, mitigating the damage to oil and gas pipelines caused by seismic motion and fault slippage transmitted from the supports, and reducing the operational risks of oil and gas pipelines within the tunnel when crossing active faults.

[0028] 2. The overhead support structure for oil and gas pipeline tunnels crossing active fault zones provided in this application includes a first elastic deformation part and multiple second elastic deformation parts. The multiple second elastic deformation parts are evenly distributed inside the first elastic deformation part. The first elastic deformation part uses longitudinally arranged rubber blocks, which can absorb seismic energy through tensile or compressive deformation during an earthquake. The second deformation parts use longitudinally arranged shape memory alloy rods, which can deform in the horizontal direction, dissipate seismic energy, and can quickly return to their original shape after an earthquake, thereby correcting the local deformation of the support and reducing the risk of oil and gas pipeline failure. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the installation of overhead support piers in a tunnel for oil and gas pipelines crossing active fault zones, according to an embodiment of this application.

[0031] Figure 2This is a front view of an overhead support pier for an oil and gas pipeline tunnel crossing an active fault zone, according to an embodiment of this application.

[0032] Figure 3 This is a side view of an overhead support pier for an oil and gas pipeline tunnel crossing an active fault zone, according to an embodiment of this application.

[0033] Figure 4 This is a top view of an overhead support pier for an oil and gas pipeline tunnel crossing an active fault zone, as proposed in one embodiment of this application.

[0034] Explanation of reference numerals in the attached figures:

[0035] 11. First support layer; 12. Second support layer; 2. Oil and gas pipeline; 3. Buffer pad layer; 4. Rubber block; 5. Shock-absorbing layer; 6. Shape memory alloy rod; 7. First sliding plate; 8. Second sliding plate; 9. Wire displacement gauge. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] In related technologies, overhead oil and gas pipelines within tunnels are typically supported by concrete supports. This support method has the following drawbacks when crossing active fault zones: ① The concrete supports are rigidly connected to the tunnel floor, allowing seismic forces to be transmitted to the oil and gas pipelines through the tunnel floor and the concrete supports, which is detrimental to the safe operation of the pipelines. ② Under seismic action, active fault zones are at risk of stick-slip slippage. In this case, the tunnel structure near the fault rupture surface deforms, causing the concrete supports to shift relative to the fault, leading to pipeline buckling failure.

[0038] In view of this, this application proposes an overhead support pier for oil and gas pipeline tunnels crossing active fault zones.

[0039] See Figure 1 An overhead support pier for oil and gas pipeline tunnels crossing active fault zones includes: a first support layer 11, a second support layer 12, and a shock-absorbing layer 5.

[0040] The first support layer 11 is connected to the tunnel floor, the second support layer 12 is connected to the oil and gas pipeline 2, and the shock-absorbing layer 5 is connected between the first support layer 11 and the second support layer 12.

[0041] The damping layer 5 has a plurality of elastic support structures inside; one end of the elastic support structure near the second support layer 12 protrudes from the damping layer 5 and is connected to the second support layer 12.

[0042] The elastic support structure is provided with a first sliding plate 7 at one end near the first support layer 11, and a second sliding plate 8 is provided on the first support layer 11 at the position corresponding to the first sliding plate 7. The first sliding plate 7 and the second sliding plate 8 are in contact and can slide relative to each other.

[0043] For details, see Figure 2 The first support layer 11 is located at the bottom and is connected to the tunnel floor slab. The second support layer 12 is located at the top and is connected to the oil and gas pipeline 2. Both the first support layer 11 and the second support layer 12 are concrete layers used to provide rigid support.

[0044] The damping layer 5, connected between the first support layer 11 and the second support layer 12, is a foamed concrete layer. Foamed concrete is lighter than traditional concrete, and its porosity gives it a low modulus of elasticity, allowing it to effectively absorb and disperse impact loads, thus reducing vibration transmission. Since the supporting capacity of foamed concrete itself is limited, multiple elastic support structures are arranged within the damping layer 5. The tops of these elastic support structures protrude from the top surface of the damping layer 5, extending into the second support layer 12 and being fixedly connected to it, strengthening the connection between the second support layer 12 and the damping layer 5 and improving the support strength and stability of the pier structure. Simultaneously, the elastic support structures can undergo elastic deformation, enabling them to withstand larger loads during earthquakes and absorb seismic energy through deformation, thereby enhancing the structure's damping capacity.

[0045] A first sliding plate 7 is installed at the bottom of the elastic support structure, and a second sliding plate 8 is installed at the position corresponding to the first sliding plate 7 on the first support layer 11. The first sliding plate 7 and the second sliding plate 8 are in contact and are arranged parallel to the plane of the tunnel floor. During fault slippage, the position where the bottom of the damping layer 5 contacts the second sliding plate 8 is subjected to horizontal shear, allowing relative movement between the first sliding plate 7 and the second sliding plate 8. Since the first sliding plate 7 is fixed to the elastic support structure, the elastic support structure is fixed to the second support layer 12, and the second sliding plate 8 is fixed to the first support layer 11, relative sliding along the tunnel axis and laterally can occur between the first support layer 11 and the second support layer 12 of the pier. This allows for better adaptation to the forced displacement caused by fault slippage, improves the structure's resistance to slippage, reduces the additional stress on the pier, and thus reduces the damage to the overhead oil and gas pipeline 2.

[0046] In this embodiment, by setting up a damping layer 5 and an elastic support structure, the pier has a certain longitudinal deformation capability during an earthquake, which reduces the damage to the oil and gas pipeline 2 caused by the ground motion transmitted by the pier; by setting up a first sliding plate 7 and a second sliding plate 8, the pier has a certain horizontal sliding capability during fault displacement, which can reduce the forced displacement transmitted to the oil and gas pipeline 2 and reduce the damage to the oil and gas pipeline 2.

[0047] Optionally, the number of the elastic support structures is set to four, and the four elastic support structures are evenly distributed at the four corners of the shock-absorbing layer 5.

[0048] like Figure 4 As shown, in an optional embodiment, the number of elastic support structures is set to four, the damping layer 5 of the support is set to a cuboid structure, the four elastic support structures are respectively set at the four corners of the damping layer 5, the distance from each elastic support structure to the edge of the damping layer 5 is equal, and the stress distribution of the structure is uniform.

[0049] In practical applications, the number of flexible support structures can be reasonably adjusted according to the actual size of the support and the installation space inside the support.

[0050] Optionally, the elastic support structure includes a first elastic deformation portion and a plurality of second elastic deformation portions, wherein the plurality of second elastic deformation portions are evenly distributed inside the first elastic deformation portion.

[0051] Optionally, the first elastic deformation portion includes a rubber block 4, which is vulcanized to the first sliding plate 7.

[0052] Specifically, the first elastic deformation section is a rectangular rubber block 4. Rubber is a hyperelastic material with strong deformation capacity, possessing an elastic modulus of approximately 80–120 MPa, a tensile strength of approximately 5.7 MPa, and an elongation at break of approximately 270%. In this embodiment, the rubber block 4 is arranged longitudinally, allowing it to absorb seismic energy through tensile or compressive deformation under seismic forces, thereby improving the structure's damping capacity. Furthermore, since the first elastic deformation section is located inside the damping layer 5, and foamed concrete surrounds the rubber block 4, air is isolated, reducing the aging rate of the rubber material and enhancing the structure's durability.

[0053] The first sliding plate 7 is located at the bottom of the rubber block 4. The first sliding plate 7 is preferably made of steel plate, and the connection between the first sliding plate 7 and the rubber block 4 can be achieved through a vulcanization process. Specifically, the vulcanization temperature is about 135 degrees Celsius, and the vulcanization time is about 1 hour, which can ensure that the rubber block 4 and the first sliding plate 7 are firmly connected.

[0054] In other embodiments, the shape of the first elastic deformation portion may also be a cylinder, a prism, etc.

[0055] Optionally, the second elastic deformation portion includes a shape memory alloy rod 6, which is disposed perpendicular to the plane where the first sliding plate 7 is located.

[0056] Specifically, the second elastic deformation section uses long, strip-shaped shape memory alloy rods 6. Multiple shape memory alloy rods 6 are arranged inside the rubber block 4, with the rods arranged longitudinally and perpendicular to the plane of the first sliding plate 7. The shape memory alloy rods 6 have high strength and superelasticity, capable of withstanding large loads and deformations, absorbing seismic energy, and quickly recovering their original shape. The maximum recoverable strain is 6%–8%, and the ultimate strain is 14%–18%. In this embodiment, the shape memory alloy rods 6 are arranged longitudinally, enabling them to deform in the horizontal direction, which helps dissipate seismic energy. After an earthquake, the pier may tilt horizontally due to deformation, but the shape memory alloy rods 6 can quickly recover their original shape, thereby correcting the local deformation of the pier, reducing the permanent deformation of the pier, and lowering the risk of failure of the oil and gas pipeline 2 due to fault displacement.

[0057] In an optional embodiment, each elastic support structure has four shape memory alloy rods 6 in its rubber block 4, and the four shape memory alloy rods 6 are evenly distributed in the rubber block 4.

[0058] In practical applications, the shape and number of the second elastic deformation section can be reasonably set according to the actual energy absorption requirements and the internal installation space of the first elastic deformation section.

[0059] Optionally, the first support layer 11 has a groove on one side facing the shock-absorbing layer 5, and the second sliding plate 8 is disposed inside the groove; the size of the groove is larger than the size of the first sliding plate 7.

[0060] Specifically, to further limit the sliding range of the first sliding plate 7, a groove is formed on the side of the first support layer 11 facing the damping layer 5. The position of the groove corresponds to the position of the first sliding plate 7, and the size of the groove is larger than the size of the first sliding plate 7. The second sliding plate 8 is disposed at the bottom of the groove. When the first sliding plate 7 and the second sliding plate 8 slide relative to each other, the first sliding plate 7 can slide within the groove area.

[0061] The second sliding plate 8 can also be made of steel plate. The contact surfaces of the first sliding plate 7 and the second sliding plate 8 are both smooth planes, which helps to reduce the friction between the first sliding plate 7 and the second sliding plate 8.

[0062] Furthermore, on the side of the first support layer 11 facing the damping layer 5, i.e., the top surface of the first support layer 11, the area other than the groove is set as a rough surface to enhance the connection strength with the damping layer 5.

[0063] In practical applications, concrete is poured as the first support layer 11. A groove is reserved on the top surface of the first support layer 11. The surface of the first support layer 11 can be roughened by chiseling in the area outside the groove so that it can be firmly connected to the damping layer 5 poured later.

[0064] Optionally, a displacement gauge is also provided inside the shock-absorbing layer 5. The displacement gauge is connected to the first sliding plate 7 and is used to detect the displacement data of the first sliding plate 7.

[0065] To facilitate real-time monitoring of the pier's displacement, a displacement gauge is installed inside the pier. Specifically, the displacement gauge can be a miniature draw-wire displacement gauge 9, which is fixed in the damping layer 5. The draw-wire end of the displacement gauge 9 is connected to the first sliding plate 7, and the signal output end of the displacement gauge 9 is connected to an external data acquisition device. When the displacement gauge 9 detects the displacement data of the first sliding plate 7, it can send the displacement data to the data acquisition device. Personnel can then obtain the real-time displacement data of the first sliding plate 7 through the data acquisition device, facilitating timely control measures to prevent pipeline damage.

[0066] The principle of using a wire displacement gauge 9 to detect the displacement of an object is a well-known technique to those skilled in the art and will not be elaborated here.

[0067] Optionally, a buffer pad is provided on the side of the second support layer 12 facing the oil and gas pipeline 2.

[0068] See Figure 2 A buffer pad 3 is also provided on top of the second support layer 12. Specifically, the buffer pad 3 can be made of rubber material and has high elasticity. The buffer pad 3 is connected between the second support layer 12 and the oil and gas pipeline 2. Compared with the rigid connection between the oil and gas pipeline and the support in the prior art, the buffer pad 3 can play a role in buffering and shock absorption, further reducing the damage to the oil and gas pipeline 2 under the action of ground vibration.

[0069] The construction steps for the overhead support piers used in the embodiment of this application for oil and gas pipeline tunnels crossing active fault zones are as follows:

[0070] 1. The first layer of concrete is poured at the reserved position on the tunnel floor as the first support layer 11. The first support layer 11 is rigidly connected to the tunnel floor. Four grooves are reserved on the top surface of the first support layer 11. The area outside the grooves is roughened to improve the overall connection between the first support layer 11 and the subsequently poured shock-absorbing layer 5.

[0071] 2. Install the second sliding plate 8 in the groove. Apply grease to the surface of the second sliding plate 8 for lubrication to reduce the friction between the first sliding plate 7 and the second sliding plate 8.

[0072] 3. Assemble the elastic support structure and install the shape memory alloy rod 6 inside the rubber block 4; vulcanize the bottom of the rubber block 4 to connect the first sliding plate 7, and place the elastic support structure in the groove with the first sliding plate 7 facing down, so that the first sliding plate 7 contacts the second sliding plate 8 and check its sliding ability.

[0073] 4. Use auxiliary brackets to fix the relative positions of the four elastic support structures, so that each elastic support structure is located as centrally as possible in the corresponding groove. The auxiliary brackets are also used to prevent the elastic support structures from shifting during the subsequent pouring of the damping layer 5.

[0074] 5. Fix the miniature wire displacement meter 9 into the groove, and fix the wire end to the first sliding plate 7;

[0075] 6. Formwork is erected and foamed concrete is poured as the damping layer 5. The pouring height of the damping layer 5 is about 5cm lower than the top of the elastic support structure. The top surface of the damping layer 5 is roughened in the area outside the elastic support structure to facilitate the improvement of the connection between the damping layer 5 and the subsequently poured second support layer 12.

[0076] 7. Set up formwork and pour the second layer of concrete as the second support layer 12;

[0077] 8. Install a rubber buffer pad 3 on top of the second support layer 12, and then install the oil and gas pipeline 2.

[0078] The overhead support pier for oil and gas pipeline tunnels crossing active fault zones provided in this application embodiment significantly improves the structure's vibration damping capacity by setting a damping layer 5 between the first support layer 11 and the second support layer 12. Multiple elastic support structures within the damping layer 5 enhance structural stability, enabling the pier to withstand significant loads during earthquakes and absorb seismic energy through elastic deformation. The first sliding plate 7 and the second sliding plate 8 allow relative sliding during fault slippage, enabling relative sliding between the first support layer 11 and the second support layer 12 along the tunnel's axial and lateral directions. This effectively reduces the forced displacement transmitted to the oil and gas pipeline 2, improves the structure's resistance to fault slippage, and solves the problems of prominent seismic response and weak deformation resistance of existing overhead support piers crossing active fault zones. This helps reduce the damage to the overhead oil and gas pipeline 2 under seismic and fault slippage effects, ensuring the safe operation of the oil and gas pipeline 2.

[0079] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0080] It should also be noted that, in this document, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations, nor should they be construed as indicating or implying relative importance. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. In the absence of further restrictions, an element defined by the phrase "includes a..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes the element.

[0081] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand this application, and the content of this specification should not be construed as a limitation of this application. Furthermore, for those skilled in the art, there will be different forms of changes in the specific implementation methods and application scope based on this application. It is neither necessary nor possible to exhaustively list all implementation methods here, and obvious changes or modifications derived therefrom are still within the protection scope of this application.

Claims

1. A type of overhead support for oil and gas pipeline tunnels crossing active fault zones, characterized in that, include: First support layer, second support layer and shock-absorbing layer; The first support layer is connected to the tunnel floor, the second support layer is connected to the oil and gas pipeline, and the shock-absorbing layer is connected between the first support layer and the second support layer; The damping layer has multiple elastic support structures inside; one end of the elastic support structure near the second support layer protrudes from the damping layer and is connected to the second support layer. The elastic support structure has a first sliding plate at one end near the first support layer, and a second sliding plate is provided on the first support layer at the position corresponding to the first sliding plate. The first sliding plate and the second sliding plate are in contact and can slide relative to each other.

2. The overhead support pier for oil and gas pipeline tunnels crossing active fault zones according to claim 1, characterized in that: The elastic support structure includes a first elastic deformation portion and a plurality of second elastic deformation portions, wherein the plurality of second elastic deformation portions are evenly distributed inside the first elastic deformation portion.

3. The overhead support pier for oil and gas pipeline tunnels crossing active fault zones according to claim 2, characterized in that: The first elastic deformation portion includes a rubber block, which is vulcanized and connected to the first sliding plate.

4. The overhead support pier for oil and gas pipeline tunnels crossing active fault zones according to claim 3, characterized in that: The second elastic deformation portion includes a shape memory alloy rod, which is arranged perpendicular to the plane of the first sliding plate.

5. The overhead support pier for oil and gas pipeline tunnels crossing active fault zones according to claim 1, characterized in that: The first support layer has a groove on one side facing the shock-absorbing layer, and the second sliding plate is disposed inside the groove; The size of the groove is larger than the size of the first sliding plate.

6. The overhead support pier for oil and gas pipeline tunnels crossing active fault zones according to claim 1, characterized in that: The number of elastic support structures is set to four, and the four elastic support structures are evenly distributed at the four corners of the shock-absorbing layer.

7. The overhead support pier for oil and gas pipeline tunnels crossing active fault zones according to claim 1, characterized in that: A buffer pad is provided on the side of the second support layer facing the oil and gas pipeline.

8. The overhead support pier for oil and gas pipeline tunnels crossing active fault zones according to claim 7, characterized in that: The material of the cushioning layer includes rubber.

9. The overhead support pier for oil and gas pipeline tunnels crossing active fault zones according to claim 1, characterized in that: The first and second support layers are made of concrete, and the damping layer is made of foamed concrete.

10. The overhead support pier for oil and gas pipeline tunnels crossing active fault zones according to claim 1, characterized in that: The damping layer is also equipped with a displacement gauge, which is connected to the first sliding plate and is used to detect the displacement data of the first sliding plate.

Images