Immersed tube supporting structure and immersed tube supporting system

Abstract

The utility model relates to the technical field of immersed tubes, in particular to an immersed tube supporting structure and an immersed tube supporting system. The supporting structure comprises a buttress and jacks arranged on the buttress, and further comprises an n-shaped beam erected on at least two jacks. The n-shaped beam comprises a top plate and two side plates connected with the top plate, the upper portion of the jack is connected with the top plate, and the two side plates are distributed on the two sides of the jack. According to the immersed tube supporting structure, the n-shaped beam is arranged to be connected with the buttresses in an erected mode, a larger supporting face can be provided, and therefore the pressure intensity generated by supporting counter force at the bottom of an immersed tube is reduced; the two side plates are distributed on the two sides of the jack, on one hand, the effect of protecting the jack can be achieved, and the probability of accidental damage to the jack is reduced; and on the other hand, a groove-shaped space can be formed with the top plate, so that the transverse sliding amplitude of the n-shaped beam relative to the jack is limited or reduced, and the probability that the n-shaped beam slides off from the jack is reduced.

Description

Technical Field

[0001] This utility model relates to the field of immersed tunnel technology, and in particular to an immersed tunnel support structure and an immersed tunnel support system. Background Technology

[0002] Within the dry dock or immersed tunnel storage area, a support structure is required to support the immersed tunnel sections. The support surface of this structure needs to be a certain height above the ground to allow the immersed tunnel sections to be placed in the air, facilitating the movement of transport trolleys beneath them to lift or raise them. In existing technologies, the support structure consists of several concrete piers protruding from the ground, spaced apart from each other. The immersed tunnel sections are placed directly on these piers. Due to the significant weight of the tunnel sections and the limited contact area between the piers and the sections, deformation or punching damage to the bottom surface of the sections may occur. While those skilled in the art have considered using distribution beams on the piers to distribute the pressure, the piers are relatively small, and the distribution beams, placed directly on their upper surfaces, are difficult to connect effectively. This makes them highly susceptible to slippage and fall under external forces, resulting in loss of support function. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art, which allows the distribution beam to easily slip and fall off the pier, and to provide a immersed tube support structure and immersed tube support system.

[0004] In a first aspect, the present invention provides a immersed tube support structure, including a pier and jacks disposed on the pier, and further including a Π-shaped beam erected on at least two of the jacks;

[0005] The Π-shaped beam includes a top plate and two side plates connected to the top plate. The upper part of the jack is connected to the top plate, and the two side plates are distributed on both sides of the jack.

[0006] The immersed tube support structure described in this utility model provides a larger support surface by setting up a Π-shaped beam to connect multiple piers, thereby reducing the pressure generated by the support reaction force at the bottom of the immersed tube, which helps to reduce the deformation of the immersed tube and reduce the probability of punching damage. The two side plates are distributed on both sides of the jack, which can protect the jack and reduce the probability of accidental damage. On the other hand, they can also form a groove-shaped space with the top plate, allowing the jack to apply a lateral force to the side plates, thereby limiting or reducing the lateral sliding range of the Π-shaped beam relative to the jack, which helps to maintain the positional stability of the Π-shaped beam and reduce the probability of it slipping off the jack. In addition, the lifting function of the jack can adjust the height of the Π-shaped beam. The Π-shaped beam can be lowered to facilitate the movement of the immersed tube, and raised to support and connect the immersed tube.

[0007] Preferably, the jack includes a fixed base and a jacking member. The fixed base is connected to the support pier, and the jacking member is connected to the Π-shaped beam. The jacking member can extend and retract vertically relative to the fixed base.

[0008] Preferably, when the elongation of the top extension member is at its maximum, the bottom edge of the side plate is lower than the top surface of the fixing seat.

[0009] Preferably, the lower part of the jack is provided with a circumferentially protruding mounting edge, which is pressed and fixed on the support by a pressing assembly.

[0010] Preferably, at least two of the crimping assemblies are arranged circumferentially along the jack.

[0011] Preferably, the crimping assembly includes a pad, a pressure plate, and a fixing screw. The pad is located outside the mounting edge, and the upper surface of the pad is flush with the upper surface of the mounting edge. The pressure plate overlaps the pad and the mounting edge. The fixing screw passes through the pad and the pressure plate in sequence and is anchored into the support. A fastening nut is provided on the side of the pressure plate away from the pad, and the fastening nut is sleeved on the fixing screw.

[0012] Preferably, in cross-section, the projection of the Π-shaped beam in the vertical direction is located within the projection range of the pier in the vertical direction.

[0013] Preferably, a buffer layer is provided on the top plate.

[0014] Preferably, the cushioning layer comprises a rubber pad and / or a wooden board.

[0015] Preferably, the Π-shaped beam is composed of a steel plate and two channel steels, one flange of the channel steel is connected to the surface of the steel plate, and the two channel steels are arranged back to back.

[0016] Preferably, the support is a concrete block.

[0017] Preferably, the jack is provided with lifting lugs on both opposite sides, and the lifting lugs are provided with lifting holes.

[0018] Preferably, the jack is a screw jack, and the jack is provided with an adjustment structure for adjusting the lifting height, the height of which is lower than the bottom edge of the side plate.

[0019] In a second aspect, this utility model provides a immersed tube support system, including an immersed tube, a passive support, and at least two immersed tube support structures as described above. The passive support supports and connects to the Π-shaped beam, and the passive support and the jack are arranged alternately along the length direction of the Π-shaped beam. The immersed tube is supported on the upper surface of the Π-shaped beam.

[0020] The passive support includes:

[0021] A first support body and a second support body are arranged opposite to each other, and the opposing surfaces of the first support body and the second support body enclose a first wedge-shaped space and a second wedge-shaped space, with the small end of the first wedge-shaped space facing the small end of the second wedge-shaped space; the second support body is provided with a positioning mandrel, and the first support body is provided with a first positioning groove, and the positioning mandrel is slidably engaged with the first positioning groove;

[0022] A first wedge block and a second wedge block capable of moving towards and away from each other, wherein the small end of the first wedge block is located within the first wedge space, and the small end of the second wedge block is located within the second wedge space, with the small ends of the first wedge block and the second wedge block being opposite each other;

[0023] A power mechanism connecting the first wedge block and the second wedge block, the power mechanism being capable of driving the first wedge block and the second wedge block to move toward or in opposite directions;

[0024] A locking structure is disposed on the opposite side of the first wedge block and / or the second wedge block, the locking structure being used to prevent the first wedge block and the second wedge block from moving away from each other.

[0025] The immersed tunnel support system described in this utility model, in addition to using the jacks as described above, also includes a passive support. The passive support achieves the rise of the first support body relative to the second support body through the pushing of wedge blocks, and maintains the height of the first support body relative to the second support body through a locking structure. It has higher reliability than the jacks, and in the event of structural failure, the descent of the passive support is less than that of the jacks, which helps to avoid excessive settlement of the entire immersed tunnel. The jacks are more flexible in adjustment than the passive support. By arranging the passive support and jacks alternately, both reliability and ease of adjustment can be taken into account, meeting the needs of immersed tunnel support.

[0026] Preferably, the second support body is provided with a second positioning groove, and the positioning mandrel is slidably engaged with the second positioning groove.

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0028] 1. The immersed tube support structure of this utility model, by setting up a Π-shaped beam to connect multiple piers, can provide a larger support surface, thereby reducing the pressure generated by the support reaction force at the bottom of the immersed tube, which is conducive to reducing the deformation of the immersed tube and reducing the probability of its punching damage; the two side plates are distributed on both sides of the jack, which can protect the jack and reduce the probability of accidental damage to the jack; on the other hand, they can also form a groove-shaped space with the top plate, and the jack can apply a lateral force to the side plates, thereby limiting or reducing the lateral sliding range of the Π-shaped beam relative to the jack, which is conducive to maintaining the positional stability of the Π-shaped beam and reducing the probability of it slipping off the jack; in addition, the lifting function of the jack can adjust and change the height of the Π-shaped beam, which can be lowered to facilitate the movement of the immersed tube, and raised to support and connect the immersed tube.

[0029] 2. The immersed tube support system of this utility model, in addition to the jacks mentioned above, also includes a passive support. The passive support achieves the rise of the first support body relative to the second support body through the pushing of wedge blocks, and maintains the height of the first support body relative to the second support body through a locking structure. It has higher reliability than the jacks, and in the event of structural failure, the descent of the passive support is less than that of the jacks, which helps to avoid excessive settlement of the entire immersed tube. The jacks are more flexible in adjustment than the passive support. By arranging the passive support and the jacks alternately, both reliability and ease of adjustment can be taken into account, meeting the needs of immersed tube support. Attached Figure Description

[0030] Figure 1 This is a cross-sectional schematic diagram of the immersed tube support structure described in Example 1;

[0031] Figure 2 for Figure 1 Enlarged view of section A in the middle;

[0032] Figure 3 for Figure 1 Enlarged view of section B in the middle;

[0033] Figure 4 This is a partial cross-sectional schematic diagram of the immersed tube support structure described in Example 1;

[0034] Figure 5 This is a front view of the immersed tube support structure described in Example 1 (another type of jack).

[0035] Figure 6 This is a cross-sectional view (state one) of the passive support described in Example 2.

[0036] Figure 7 This is a cross-sectional view (state two) of the passive support described in Example 2.

[0037] Figure 8 This is a top view of the passive support described in Example 2.

[0038] Marked in the image:

[0039] 1-Buttress;

[0040] 2-jack;

[0041] 21-Fixed base; 22-Top extension; 23-Mounting edge; 24-Lifting lug plate; 25-Adjusting structure; 26-Pressure rod;

[0042] 3-Π-shaped beam;

[0043] 31-Top plate; 32-Side plate;

[0044] 4-Crimp assembly;

[0045] 41-Plate; 42-Pressure plate; 43-Fixing screw; 44-Fastening nut;

[0046] 5-Buffer layer;

[0047] 6- Passive support;

[0048] 61-First support body; 62-Second support body; 63-First wedge-shaped space; 64-Second wedge-shaped space; 65-First wedge block; 66-Second wedge block; 67-Power mechanism; 68-Positioning spindle; 69-First positioning groove; 610-Sliding screw. Detailed Implementation

[0049] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0050] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0051] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0052] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0053] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0054] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0055] Example 1

[0056] like Figures 1 to 5 As shown, this embodiment provides a immersed tube support structure, including a support pier 1 and jacks 2 installed on the support pier 1, and also includes a Π-shaped beam 3 erected on at least two jacks 2; the Π-shaped beam 3 includes a top plate 31 and two side plates 32 connected to the top plate 31, the upper part of the jacks 2 is connected to the top plate 31, and the two side plates 32 are distributed on both sides of the jacks 2.

[0057] The support pier 1 is a raised structure set on the ground, which can be a plain concrete block, a reinforced concrete block, or a steel block, etc. In this embodiment, the support pier 1 is preferably a plain concrete block, which has good compressive strength, relatively low cost, and is easy to dismantle later. The support pier 1 mainly plays the role of transmitting downward pressure. The shape of the support pier 1 can be approximately a rectangular block, a circular block, etc. Several support piers 1 are arranged at intervals along a first direction or a second direction, with the first direction perpendicular to the second direction, to jointly support the immersed tube.

[0058] In the existing technology, the immersed tube is placed directly on the upper surface of several piers 1. Due to the large weight of the immersed tube, the supporting surface area that the upper surface of the piers 1 can provide is small, which will cause the immersed tube to be subjected to a large punching force transmitted from the piers 1, which can easily cause the immersed tube to deform and may cause punching damage in severe cases.

[0059] The jack 2 is a device or component with lifting capacity. The jack 2 is fixedly installed on the support 1 and serves to connect and support the Π-shaped beam 3. The jack 2 includes a fixed base 21 and a lifting member 22. The lifting member 22 can extend and retract vertically relative to the fixed base 21. In some embodiments, the fixed base 21 is called the main cylinder and the lifting member 22 is called the piston. The lifting and lowering states can be switched by extending and retracting the lifting member 22 relative to the fixed base 21.

[0060] According to the structure and driving method, the jack 2 can be divided into screw jacks, hydraulic jacks, electric jacks, etc. In this embodiment, the jack 2 is preferably a screw jack. Screw jacks have the advantages of easy maintenance, strong load-bearing capacity and low cost, and are less prone to sudden drops, with relatively high structural reliability.

[0061] Preferably, in order to reduce the construction and dismantling costs of the support 1, the horizontal cross-section of the support 1 should be slightly larger than the bottom surface of the jack 2. One jack 2 is installed on each support 1, and the Π-shaped beam 3 is erected on the jacks 2 of multiple supports 1.

[0062] The Π-shaped beam 3 is a strip-shaped structural member, including a top plate 31 and two side plates 32 connected to the top plate 31, with the two side plates 32 located on the same side of the top plate 31. The cross-sectional shape of the Π-shaped beam 3 is approximately "Π". The jack 2 can support the bottom surface connected to the top plate 31, and the two side plates 32 are distributed on both sides of the upper part of the jack 2, such as... Figures 1 to 5 As shown.

[0063] The upper surface of the Π-shaped beam 3 can form a continuous support surface. Compared with the upper surface of the pier 1 or the jack 2, the Π-shaped beam 3 provides a larger support surface area, which can effectively reduce local pressure, reduce the deformation of the bottom surface of the immersed tube, and reduce the probability of the immersed tube being punched and damaged.

[0064] The two side plates 32 are located on both sides of the upper part of the jack 2, which can protect the upper structure of the jack 2, especially the extension member 22. It is understood that the lateral external force acting on the extension member 22 is likely to break the extension member 22 or damage the fixed seat 21. This would not only cause equipment damage, but also interrupt the transfer of the immersed tube. Furthermore, there is a significant safety risk in replacing the jack 2 below the immersed tube.

[0065] In addition, the top plate 31 and the two side plates 32 of the Π-shaped beam 3 can enclose a groove-shaped space. The upper part of the jack 2 is embedded in the groove-shaped space. The jack 2 can apply a lateral force to the side plates 32, thereby limiting or reducing the lateral sliding amplitude of the Π-shaped beam 3 relative to the jack 2, which is conducive to maintaining the positional stability of the Π-shaped beam 3 and reducing the probability of it slipping off the jack 2.

[0066] Jack 2 has a lifting function, which can drive the Π-shaped beam 3 above it to rise or fall, thereby changing the height of the support surface. When moving the immersed tube, the height of the Π-shaped beam 3 can be lowered first, so that the immersed tube can pass smoothly above the Π-shaped beam 3. After the immersed tube is moved to the preset position, the Π-shaped beam 3 can be raised to make the Π-shaped beam 3 contact and support the immersed tube. In this case, the moving trolley does not need to have a lifting function, which helps to simplify the moving trolley.

[0067] In summary, the immersed tube support structure described in this embodiment, by setting up a Π-shaped beam 3 to connect multiple piers 1, can provide a larger support surface, thereby reducing the pressure generated by the support reaction force at the bottom of the immersed tube, which is beneficial to reducing the deformation of the immersed tube and reducing the probability of its punching damage; the two side plates 32 are distributed on both sides of the jack 2, which can protect the jack 2 and reduce the probability of accidental damage to the jack 2; on the other hand, they can also form a groove-shaped space with the top plate 31, and the jack 2 can apply a lateral force to the side plates 32, thereby limiting or reducing the lateral sliding range of the Π-shaped beam 3 relative to the jack 2, which is beneficial to maintaining the positional stability of the Π-shaped beam 3 and reducing the probability of it slipping off the jack 2; in addition, the lifting function of the jack 2 can adjust and change the height of the Π-shaped beam 3, which can be lowered to facilitate the movement of the immersed tube, and raised to support and connect the immersed tube.

[0068] Preferably, the bottom edge of the side plate 32 is lower than the top surface of the fixing base 21.

[0069] It is understandable that the jack 2 is often damaged because the extension member 22 is subjected to a large lateral external force. The lateral external force causes the extension member 22 to bend at the upper surface of the fixed seat 21, resulting in the breakage of the extension member 22 or damage to the fixed seat 21. Therefore, the bottom edge of the side plate 32 can be made lower than the top surface of the fixed seat 21 to protect the extension member 22 from external impact, thereby reducing the probability of the jack 2 being damaged.

[0070] More preferably, when the extension of the top member 22 is at its maximum, the bottom edge of the side plate 32 is lower than the top surface of the fixed base 21; thus, the top member 22 can be protected throughout the entire operation.

[0071] In some embodiments, the jack 2 has a circumferentially protruding mounting edge 23 at its lower part, and the mounting edge 23 is pressed and fixed to the support 1 by the pressing assembly 4.

[0072] The mounting edge 23 protrudes from the side wall of the main structure of the jack 2. The mounting edge 23 is pressed and fixed to the support 1 by the pressing assembly 4, thereby fixing the jack 2 to the support 1. The main structure of the jack 2 can be the seat of the fixed base 21, the cylinder of the main body, etc. In some embodiments, a base plate can be welded to the bottom of the jack 2, and the base plate extends out of the side wall of the jack 2 to form the mounting edge 23.

[0073] The jack 2 is mainly made of metal, while the support 1 is usually made of concrete. Press-fitting can easily achieve a tight connection between different materials; and press-fitting can significantly improve the fixing strength of the jack 2, enabling it to withstand larger lateral external forces without shifting.

[0074] Preferably, at least two crimping components 4 are arranged around the jack 2; more preferably, four crimping components 4 are arranged around the jack 2.

[0075] In some implementations, such as Figure 2 As shown, the crimping assembly 4 includes a pad 41, a pressure plate 42, and a fixing screw 43. The pad 41 is located outside the mounting edge 23, and the upper surface of the pad 41 is flush with the upper surface of the mounting edge 23. The pressure plate 42 overlaps the pad 41 and the mounting edge 23. The fixing screw 43 passes through the pad 41 and the pressure plate 42 in sequence and is anchored into the support 1. A fastening nut 44 is provided on the side of the pressure plate 42 away from the pad 41, and the fastening nut 44 is sleeved on the fixing screw 43.

[0076] The pad 41 and pressure plate 42 are preferably steel plates; the fixing screw 43 is preferably a pre-embedded screw on the support 1. During installation, the jack 2 can be placed in the plane space formed by multiple fixing screws 43, and then the pad 41 and pressure plate 42 can be inserted into the fixing screw 43 in sequence, and the part of the pressure plate 42 extending out of the pad 41 can overlap the upper surface of the installation edge 23. Finally, the fastening nut 44 is screwed into the fixing screw 43 to achieve fastening.

[0077] In some embodiments, in cross-section, the projection of the Π-shaped beam 3 in the vertical direction is located within the projection range of the pier 1 in the vertical direction; that is, on both sides in the transverse direction, the sides of the Π-shaped beam 3 do not extend beyond the sides of the pier 1.

[0078] It is understandable that when designing the immersed tube storage area or dry dock, the movement boundary of the transfer trolley is usually designed according to the boundary of the support 1, so that the side of the Π-shaped beam 3 does not extend beyond the side of the support 1, which can better protect the Π-shaped beam 3, and at the same time will not hinder the movement of the transfer trolley.

[0079] Preferably, a buffer layer 5 is provided on the top plate 31; more preferably, the buffer layer 5 includes a rubber pad and / or a wooden board; the rubber pad or wooden board can be laid on the upper surface of the top plate 31, which can appropriately buffer when subjected to force, while protecting the paint on the top steel plate.

[0080] In some embodiments, the Π-shaped beam 3 is composed of a steel plate and two channel steels, with one flange of the channel steel connected to the surface of the steel plate, and the two channel steels arranged back-to-back, such as... Figure 1 and Figure 3 As shown.

[0081] In the above structure, the steel plate plays the main supporting role, and the channel steel can be used as ribs to strengthen the steel plate; it can be understood that, due to the large weight of the immersed tube, the steel plate that makes up the Π-shaped beam 3 can be a medium-thick steel plate of 18-25mm.

[0082] In some embodiments, lifting lugs 24 are provided on both opposite sides of the jack 2, and lifting holes are provided on the lifting lugs 24. The lifting holes can be connected by steel wire ropes, and the jack 2 can be removed from the support 1 by lifting the steel wire ropes with hoisting equipment.

[0083] In some embodiments, the jack 2 is provided with an adjustment structure 25 for adjusting the lifting height, and the height of the adjustment structure 25 is lower than the bottom of the side plate 32.

[0084] like Figure 4 and Figure 5 As shown, the adjustment structure 25 is used to control the lifting and lowering of the jack 2. When the jack 2 is a screw jack, the adjustment structure 25 can be an external gear for the pressure rod 26 or ratchet wrench to rotate. By rotating the external gear, the internal large gear is driven to rotate, thereby causing the screw to rotate and realizing the lifting and lowering action. After the adjustment is completed, the pressure rod 26 and ratchet wrench can be removed from the adjustment structure 25, saving space and can be used to adjust other jacks 2. The height of the adjustment structure 25 is lower than the bottom of the side plate 32, which makes it convenient to adjust the height of the jack 2 without removing the Π-shaped beam 3.

[0085] Example 2

[0086] This embodiment provides a immersed tube support system, including an immersed tube and at least two immersed tube support structures as described in Embodiment 1, wherein the immersed tube is supported on the upper surface of the Π-shaped beam 3; the immersed tube can be a steel shell immersed tube or a concrete immersed tube.

[0087] In some embodiments, a passive support 6 is also included, which supports the connected Π-shaped beam 3. The passive support 6 and the jack 2 are arranged alternately along the length of the Π-shaped beam 3. The upper surfaces of both can support the bottom surface of the connected top plate 31, so that the passive support 6 and the jack 2 jointly support the Π-shaped beam 3, thereby supporting the immersed tube.

[0088] Preferably, such as Figures 6 to 8 As shown, the passive support 6 includes a first support body 61 and a second support body 62 disposed opposite to each other. A first wedge-shaped space 63 and a second wedge-shaped space 64 are formed between the opposing surfaces of the first support body 61 and the second support body 62. The small end of the first wedge-shaped space 63 is opposite to the small end of the second wedge-shaped space 64. A positioning spindle 68 is provided on the second support body 62, and a first positioning groove 69 is provided on the first support body 61. The positioning spindle 68 slides in conjunction with the first positioning groove 69. It also includes a first wedge block 65 and a second wedge block 66 capable of moving in opposite directions. The small end of the wedge block 65 is located within the first wedge space 63, and the small end of the second wedge block 66 is located within the second wedge space 64. The small ends of the first wedge block 65 and the second wedge block 66 are opposite to each other. The system also includes a power mechanism 67 connecting the first wedge block 65 and the second wedge block 66, and a locking structure for preventing the first wedge block 65 and the second wedge block 66 from moving away from each other. The power mechanism 67 can drive the first wedge block 65 and the second wedge block 66 to move towards or away from each other. The locking structure can be provided on the opposite sides of the first wedge block 65 and the second wedge block 66.

[0089] The first support 61 and the second support 62 are preferably arranged vertically, such as... Figure 6 and Figure 7 As shown, in this embodiment, the first support 61 is located above the second support 62; the bottom surface of the first support 61 and the top surface of the second support 62 can enclose two wedge-shaped spaces, which are defined as the first wedge-shaped space 63 and the second wedge-shaped space 64, respectively; the first wedge-shaped space 63 and the second wedge-shaped space 64 are distributed on both sides of the first support 61 and the second support 62, and their small ends are arranged opposite each other.

[0090] The small end of the wedge-shaped space is opposite to the large end, where the small end refers to the end with a relatively smaller size and the large end refers to the end with a relatively larger size.

[0091] Furthermore, to reduce the probability of lateral misalignment between the first support 61 and the second support 62, a positioning mandrel 68 can be provided on the second support 62, and a first positioning groove 69 can be provided on the first support 61. The lateral misalignment between the first support 61 and the second support 62 can be limited through the sliding engagement of the positioning mandrel 68 and the first positioning groove 69. Figure 6 and 7As shown, the positioning spindle 68 can be vertically set and can slide vertically along the first positioning groove 69 to guide the first support body 61 to rise and fall vertically relative to the second support body 62.

[0092] More preferably, the second support body 62 is provided with a second positioning groove, which is aligned with the first positioning groove 69, and the positioning mandrel 68 can slide simultaneously in the first positioning groove 69 and the second positioning groove.

[0093] A first wedge block 65 and a second wedge block 66 are disposed between a first support body 61 and a second support body 62. The two sides of the first wedge block 65 can fit against the upper and lower sidewalls of the first wedge-shaped space 63, with the smaller end of the first wedge block 65 facing the smaller end of the first wedge-shaped space 63. Similarly, the two sides of the second wedge block 66 can fit against the upper and lower sidewalls of the second wedge-shaped space 64, with the smaller end of the second wedge block 66 facing the smaller end of the second wedge-shaped space 64. When the first wedge block 65 and the second wedge block 66 approach each other, they can push away the first support body 61 and the second support body 62, causing the first support body 61 to rise relative to the second support body 62. Conversely, when the first wedge block 65 and the second wedge block 66 move away from each other, the first support body 61 descends under the action of gravity and load. Figure 6 and Figure 7 The diagram shows two different heights.

[0094] The power mechanism 67 can be a telescopic cylinder, etc. One end of the power mechanism 67 is connected to the first wedge block 65 and the other end is connected to the second wedge block 66. Through the telescopic action, the first wedge block 65 and the second wedge block 66 can move closer or further apart.

[0095] Preferably, telescopic cylinders are respectively provided on both sides of the first support body 61 and the second support body 62. The two telescopic cylinders are connected to the first wedge block 65 through the first connecting rod, and the two telescopic cylinders are connected to the second wedge block 66 through the second connecting rod.

[0096] To constrain the movement direction of the first wedge block 65 and the second wedge block 66, preferably, a sliding screw 610 is also included, which passes through the first wedge block 65 and the second wedge block 66. The sliding screw 610 can be fixedly connected to one of the wedge blocks and can slide relative to the other wedge block.

[0097] Preferably, there are two sliding screws 610, and the two sliding screws 610 are distributed on both sides of the positioning mandrel 68.

[0098] To maintain the height of the first support 61 relative to the second support 62, a locking structure can be provided on the outside of the wedge block to prevent the two wedge blocks from moving away from each other; for example, the locking structure can be a limiting nut sleeved on the sliding screw 610, with the limiting nut located on the outside of the wedge block.

[0099] In one embodiment, limit nuts are provided on the opposite sides of the first wedge block 65 and the second wedge block 66.

[0100] In another embodiment, the sliding screw 610 is fixedly connected to the second wedge block 66, and the limiting nut can be set on the side of the first wedge block 65 away from the second wedge block 66; fixing nuts can be set on both sides of the second wedge block 66 to fix the sliding screw 610 to the second wedge block 66, and the fixing nuts are sleeved on the sliding screw 610.

[0101] It is understandable that the passive support 6 achieves the rise of the first support body 61 relative to the second support body 62 through the pushing of the wedge block, and maintains the height of the first support body 61 relative to the second support body 62 through the locking structure. It is more reliable than the jack 2, and in the event of structural failure, the descent of the passive support 6 is less than that of the jack 2, which helps to avoid excessive settlement of the entire immersed tube. The jack 2 is more flexible in adjustment relative to the passive support 6. The staggered arrangement of the passive support 6 and the jack 2 can meet the needs of immersed tube support while taking into account both reliability and ease of adjustment.

[0102] In some embodiments, at least two Π-shaped beam groups are arranged along a first direction, each Π-shaped beam group includes at least two Π-shaped beams 3 spaced apart along a second direction, and the Π-shaped beams 3 in each Π-shaped beam group extend along the first direction; the first direction is perpendicular to the second direction.

[0103] The first direction can be the length of the immersed tube, and the second direction can be the width of the immersed tube; through multiple Π-shaped beams 3, the immersed tube can be provided with relatively comprehensive support.

[0104] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tunnel support structure, characterized by, It includes a support (1) and a jack (2) set on the support (1), and also includes a Π-shaped beam (3) erected on at least two of the jacks (2). The Π-shaped beam (3) includes a top plate (31) and two side plates (32) connected to the top plate (31). The upper part of the jack (2) is connected to the top plate (31), and the two side plates (32) are distributed on both sides of the jack (2).

2. The immersed tube support structure according to claim 1, wherein, The jack (2) includes a fixed base (21) and a jacking member (22). The fixed base (21) is connected to the support (1), and the jacking member (22) is connected to the Π-shaped beam (3). The jacking member (22) can extend and retract vertically relative to the fixed base (21). When the extension of the top member (22) is at its maximum, the bottom edge of the side plate (32) is lower than the top surface of the fixed base (21).

3. The immersed tube support structure according to claim 1, wherein, The jack (2) has a circumferentially protruding mounting edge (23) at its lower part, and the mounting edge (23) is pressed and fixed on the support (1) by the pressing assembly (4).

4. The immersed tube support structure according to claim 3, wherein, At least two of the crimping assemblies (4) are arranged circumferentially along the jack (2); The crimping assembly (4) includes a pad (41), a pressure plate (42), and a fixing screw (43). The pad (41) is located outside the mounting edge (23), and the upper surface of the pad (41) is flush with the upper surface of the mounting edge (23). The pressure plate (42) overlaps the pad (41) and the mounting edge (23). The fixing screw (43) passes through the pad (41) and the pressure plate (42) in sequence and is anchored into the support (1). A fastening nut (44) is provided on the side of the pressure plate (42) away from the pad (41), and the fastening nut (44) is sleeved on the fixing screw (43).

5. The immersed tube support structure according to claim 1, wherein, In cross-section, the projection of the Π-shaped beam (3) in the vertical direction is located within the projection range of the pier (1) in the vertical direction.

6. The immersed tube support structure according to claim 1, wherein, A buffer layer (5) is provided on the top plate (31); the buffer layer (5) includes a rubber pad and / or a wooden board.

7. The immersed tube support structure according to claim 1, characterized in that: The Π-shaped beam (3) is composed of a steel plate and two channel steels. One flange of the channel steel is connected to the surface of the steel plate, and the two channel steels are arranged back to back. And / or, the support (1) is a concrete block.

8. The immersed tube support structure according to claim 1, characterized in that: The jack (2) is provided with lifting lugs (24) on both sides opposite to each other, and the lifting lugs (24) are provided with lifting holes; And / or, the jack (2) is a screw jack, and the jack (2) is provided with an adjustment structure (25) for adjusting the lifting height, the height of the adjustment structure (25) being lower than the bottom edge of the side plate (32).

9. A caisson support system comprising a caisson, characterized in that It also includes a passive support (6) and at least two immersed tube support structures as described in any one of claims 1-8, wherein the passive support (6) supports and connects the Π-shaped beam (3), and the passive support (6) and the jack (2) are staggered along the length direction of the Π-shaped beam (3); the immersed tube is supported on the upper surface of the Π-shaped beam (3); The passive support (6) includes: A first support body (61) and a second support body (62) are arranged opposite to each other. The opposing surfaces of the first support body (61) and the second support body (62) enclose a first wedge-shaped space (63) and a second wedge-shaped space (64). The small end of the first wedge-shaped space (63) is opposite to the small end of the second wedge-shaped space (64). The second support body (62) is provided with a positioning mandrel (68), and the first support body (61) is provided with a first positioning groove (69). The positioning mandrel (68) is slidably engaged with the first positioning groove (69). A first wedge (65) and a second wedge (66) capable of moving towards and away from each other, wherein the small end of the first wedge (65) is located in the first wedge space (63), and the small end of the second wedge (66) is located in the second wedge space (64), with the small end of the first wedge (65) opposite to the small end of the second wedge (66); A power mechanism (67) connecting the first wedge (65) and the second wedge (66) is provided, which is capable of driving the first wedge (65) and the second wedge (66) to move toward each other or in opposite directions. A locking structure is provided on the opposite sides of the first wedge (65) and / or the second wedge (66), the locking structure being used to prevent the first wedge (65) and the second wedge (66) from moving away from each other.

10. The immersed tube support system according to claim 9, wherein, The second support (62) is provided with a second positioning groove, and the positioning mandrel (68) slides in cooperation with the second positioning groove.

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