Sleeve mounting assembly

Abstract

The invention discloses a casing pipe installation assembly which comprises a casing pipe, a supporting unit and an anchoring unit, the casing pipe is arranged in an operation vertical shaft in a clearance sleeving mode, and the casing pipe is provided with an operation end extending out of the operation vertical shaft. The supporting unit is arranged at a wellhead of the operation shaft, and the anchoring unit is connected with the lower portion of the sleeve and the inner side wall of the operation shaft. As the upper part of the supporting unit is connected to the operation end, and the lower part of the supporting unit is connected to the inner side wall of the operation vertical shaft or the construction site on the outer side of the wellhead of the operation vertical shaft, the supporting unit can provide supporting force for the casing in the vertical direction, and the supporting unit and the anchoring unit can bear the self weight of the casing and the weight of auxiliary pipelines and equipment of the casing at the same time; therefore, the stress of the anchoring belt and the sealing plug can be reduced, the bearing capacity of the sealing plug and the anchoring belt is improved, the sealing plug and the anchoring belt are prevented from being damaged, accidents such as leakage of stored products caused by the fact that the sleeve falls into the cave tank are prevented, and the safety of the stored products in the underground water-sealed cave depot is improved.

Description

Technical Field

[0001] This application belongs to the technical field of inner casing installation in operation shafts for underground water-sealed caverns, and specifically relates to a casing installation assembly. Background Art

[0002] In an underground water-sealed cavern for storing products (such as petroleum or natural gas), the cavern tanks are usually excavated at a depth range of 50m to 200m underground, and a connection passage is established with the pipeline system on the ground through an operation shaft. A casing is installed in the operation shaft, and the casing provides an installation space for the connecting pipeline between the cavern tank and the ground pipeline system and the equipment to be installed at the depth of the cavern tank.

[0003] In related technologies, the casing is installed by a rigid anchoring method. Reinforced concrete is used to anchor the casing at the position where the anchoring belt is connected to the operation shaft to form a sealing plug. The anchoring position is in the middle and lower part of the casing, and the weight of the casing itself, its accessory pipelines and equipment all act on the sealing plug and the anchoring belt. As the specifications of the casing, accessory pipelines and equipment increase, the stress on the sealing plug and the anchoring belt increases, which will cause damage to the sealing plug and the anchoring belt, resulting in the casing falling into the cavern tank, and accidents such as leakage of the products stored in the cavern tank will occur. Summary of the Invention

[0004] To solve the technical problem that the sealing plug and the anchoring belt are damaged due to the increased stress in related technologies, this application provides a casing installation assembly, which is installed in an operation shaft. The casing installation assembly includes:

[0005] A casing, sleeved in the operation shaft with a gap, and having an operation end extending out of the operation shaft;

[0006] A support unit, arranged at the wellhead of the operation shaft, the upper part of the support unit is connected to the operation end, and the lower part is connected to the inner side wall of the operation shaft or the construction site outside the wellhead of the operation shaft. The support unit is used to support the casing in the vertical direction;

[0007] An anchoring unit, connecting the lower part of the casing to the inner side wall of the operation shaft.

[0008] In some embodiments, under the condition that the lower part of the support unit is connected to the inner side wall of the operation shaft, the support unit includes:

[0009] A support member, connected to the inner side wall of the operation shaft;

[0010] A first hanging block, connected to the periphery of the operation end of the casing, and the first hanging block is hung on the support member.

[0011] In some embodiments, the support member includes:

[0012] The first sleeve support is provided with a first hanging hole for sleeving the sleeve.

[0013] The support beam is connected to the inner side wall of the operation shaft.

[0014] The elastic member is connected between the first sleeve support and the support beam.

[0015] In some embodiments, the first sleeve support includes:

[0016] A plurality of clamping members, which are connected and enclose to form the first hanging hole, and the elastic member abuts against the connection position between two adjacent clamping members.

[0017] In some embodiments, the sleeve installation assembly further includes:

[0018] A plurality of first constraint units, which are arranged at intervals along the vertical direction, and the first constraint units connect the inner side wall of the operation shaft and the sleeve.

[0019] In some embodiments, the first constraint unit includes:

[0020] The constraint bracket is installed on the inner side wall of the operation shaft.

[0021] The pipe clamp is connected to the constraint bracket and encloses with the constraint bracket to form a surrounding hole, and the sleeve is clamped in the surrounding hole.

[0022] In some embodiments, the first constraint unit further includes:

[0023] The cushioning member is connected to the pipe clamp and is located between the pipe clamp and the sleeve; and / or, is connected to the constraint bracket and is located between the constraint bracket and the sleeve.

[0024] In some embodiments, a second constraint unit is further provided between some adjacent first constraint units for connection, and the second constraint unit is connected to the sleeve.

[0025] In some embodiments, the second constraint unit includes:

[0026] The second sleeve support is provided with a second hanging hole for sleeving the sleeve, and the second sleeve support abuts against the constraint bracket.

[0027] The second hanging block is connected to the circumferential side of the sleeve and abuts against the side of the second sleeve support away from the constraint bracket.

[0028] In some embodiments, two sets of the second sleeve brackets are provided, the second hanging block is clamped between the two second sleeve brackets, and one side of the second sleeve bracket away from the second hanging block abuts against two adjacent restraint brackets respectively.

[0029] According to the sleeve installation assembly provided by one or more embodiments of the present application, the sleeve installation assembly includes a sleeve, a support unit and an anchoring unit. The sleeve is sleeved in the operation shaft with a gap and has an operation end extending out of the operation shaft. The support unit is arranged at the wellhead of the operation shaft, and the anchoring unit connects the lower part of the sleeve to the inner side wall of the operation shaft. Since the upper part of the support unit is connected to the operation end and the lower part is connected to the inner side wall of the operation shaft or the construction site outside the wellhead of the operation shaft, the support unit can provide a supporting force for the sleeve in the vertical direction. Then, the support unit and the anchoring unit can bear the weight of the sleeve itself and the weight of the accessory pipes and equipment of the sleeve at the same time. In this way, the stress on the anchoring belt and the sealing plug can be reduced, the bearing capacity of the sealing plug and the anchoring belt can be improved, the damage to the sealing plug and the anchoring belt can be prevented, and thus the occurrence of accidents such as the sleeve falling into the cavern and causing the leakage of stored products can be prevented, and the safety of the stored products in the groundwater-sealed cavern can be improved. Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of the sleeve installation assembly in one or more embodiments of the present application;

[0031] Figure 2 is a schematic structural diagram of the cooperation between the anchoring belt and the sealing plug and the sleeve in one or more embodiments of the present application;

[0032] Figure 3 is a schematic structural diagram of the support member in one or more embodiments of the present application;

[0033] Figure 4 is a schematic structural diagram of the support member from another angle in one or more embodiments of the present application;

[0034] Figure 5 is a schematic structural diagram of the first restraint unit in one or more embodiments of the present application.

[0035] Description of the Reference Numerals:

[0036] 10. Operation shaft; 11. Wellhead; 12. Inner side wall;

[0037] 20. Sleeve; 21. Operation end;

[0038] 30. Support unit; 31. Support member; 311. First sleeve bracket; 312. Clamping member; 313. Connecting ear; 314. First hanging hole; 315. Support beam; 316. Elastic member; 317. Abutting member; 318. Support plate; 32. First hanging block;

[0039] 40. Anchor unit; 41. Anchor belt; 42. Sealing plug;

[0040] 50. First restraint unit; 51. Restraint bracket; 52. Pipe clamp; 521. Encircling hole; 53. Pad; 531. Pad block; 532. Contact block;

[0041] 60. Second restraint unit; 61. Second casing bracket; 62. Second hanging block. Detailed implementation manners

[0042] In order to enable those skilled in the art in the technical field to which the present application belongs to understand the present application more clearly, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0043] The tank for storing products (such as petroleum or natural gas, etc.) in the underground water-sealed cavern is usually excavated within the depth range of 50 m to 200 m underground, and a connection channel is established with the pipeline system on the ground through the operation shaft. A casing is installed in the operation shaft, and the casing provides an installation space for the connecting pipeline between the tank and the ground pipeline system and the equipment that needs to be installed at the depth of the tank.

[0044] In the related art, the casing is installed by a rigid anchoring method. The casing is anchored on the operation shaft with a reinforced concrete at the position where the anchor belt is connected to form a sealing plug. The anchoring position is located in the middle and lower part of the casing. The weight of the casing itself and the weight of the accessory pipelines and equipment of the casing all act on the sealing plug and the anchor belt. When the casing expands and contracts due to temperature changes, the two ends of the casing can freely expand and contract.

[0045] The installation method of rigid anchoring of the casing can meet the use requirements during operation. However, with the increase in the specification and length of the casing, the following problems exist in this installation method:

[0046] 1. In terms of the bearing performance of the sealing plug and the anchoring belt. As the specifications of the casing, the attached pipelines and equipment increase. The diameter of the casing increases and the length grows, so the weight of the casing itself increases. Due to the increase in the installation space provided by the casing, the specifications of the attached pipelines and equipment also increase accordingly, so the additional force exerted on the casing by the attached pipelines and equipment also increases. The weight of the casing itself and the additional force both act on the sealing plug and the anchoring belt, resulting in an increase in the stress on the sealing plug and the anchoring belt. As the stress on the sealing plug and the anchoring belt increases, the requirements for the stress performance of the concrete sealing plug and the anchoring belt also increase more and more. When it reaches a certain level, the sealing plug and the anchoring belt cannot meet the stress requirements, which will cause damage to the sealing plug and the anchoring belt, resulting in the casing falling into the hole tank, and accidents such as leakage of the products stored in the hole tank will occur.

[0047] 2. In terms of stress release during the construction process. During the anchoring construction of the casing, the casing is suspended in the operation shaft by using a rigid support erected at the wellhead of the operation shaft, and then concrete is poured to the position of the anchoring belt to form a sealing plug. The thickness of the sealing plug of the reinforced concrete structure in the vertical direction is usually higher than 4m, and the curing period required after the reinforced concrete is poured is relatively long. During the curing period of the reinforced concrete structure, the thermal expansion and contraction of the casing due to temperature changes will cause the anchoring belt to move in the sealing plug of the reinforced concrete structure, and there is a gap between the anchoring belt and the sealing plug, which affects the firmness of the casing anchoring. When water is injected into the operation shaft, a large amount of water will leak into the hole tank through the gap between the anchoring belt and the sealing plug.

[0048] To solve the above technical problems, please refer to Figure 1 , this application provides a casing installation assembly.

[0049] The casing installation assembly includes a casing 20, a support unit 30 and an anchoring unit 40. The casing 20 is usually sleeved in the operation shaft 10, and is used to provide an installation space for the connecting pipeline between the hole tank and the ground pipeline system and the equipment that needs to be installed at the depth of the hole tank, so that the hole tank can establish a connection with the ground pipeline system by using the connecting pipeline installed in the casing 20.

[0050] Since the hole tank is usually excavated within a depth range of 50m to 200m underground, and the depth of the operation shaft 10 connected to the hole tank is usually 50m to 200m. Since the casing needs to extend to the bottom of the hole tank, the overall length of the casing 20 sleeved in the operation shaft 10 is usually 100m to 250m. For the convenience of processing and transportation, the casing 20 is usually divided into single sections with a length of 12m (it can also be divided into other lengths according to actual needs). The casing 20 is suspended in the operation shaft 10 by using a rigid support erected at the wellhead 11 of the operation shaft 10. After two adjacent sections of the casing 20 are welded, they are continued to be lowered into the operation shaft 10 until the casing 20 extends to the required length.

[0051] The casing 20 is sleeved in the operation shaft 10 with a clearance and has an operation end 21 extending out of the operation shaft 10. The support unit 30 is arranged at the wellhead 11 of the operation shaft 10. The upper part of the support unit 30 is connected to the operation end 21, and the lower part is connected to the inner side wall 12 of the operation shaft 10. The inner side wall 12 of the operation shaft 10 provides a reaction support force to the support unit 30, so that the support unit 30 can support the casing 20 in the vertical direction.

[0052] In some embodiments, the lower part of the support unit 30 can also be placed on the construction site outside the wellhead 11 of the operation shaft 10 or on a steel structure platform. The installation method and installation position of the lower part of the support unit 30 can be set according to actual needs, and the present application does not make any limitations.

[0053] After the support unit 30 stably supports the casing 20, the anchoring unit 40 is used to anchor and connect the casing 20 to the inner side wall 12 of the operation shaft 10. The anchoring unit 40 is located in the operation shaft 10 near the cavity tank. The depth of the anchoring unit 40 along the casing 20 can be set according to actual needs, and the present application does not make any limitations.

[0054] Please refer to Figures 1 to 2 , the anchoring unit 40 generally includes an anchoring belt 41 welded to the circumferential side of the casing 20. The position of the anchoring belt 41 on the casing 20 can be determined according to the anchoring position of the casing 20. The anchoring belt 41 can be welded to the casing 20 before the casing 20 is sleeved in the operation shaft 10, or can be welded to the casing 20 in the operation shaft 10 after the casing 20 is sleeved in the operation shaft 10.

[0055] The anchoring belt 41 can be arranged around the circumferential side of the casing 20 and can be a single group or multiple groups of annular metal compositions. When the anchoring belt 41 is multiple groups of annular metal compositions, the multiple groups of annular metal compositions are arranged at intervals along the extending direction of the casing 20.

[0056] After the casing 20 is lowered into the operation shaft 10, concrete is poured in layers at positions corresponding to the anchoring belt 41 on the casing 20 in the operation shaft 10, so that the concrete covers the anchoring belt 41 to form a concrete sealing plug 42. The anchoring belt 41 can increase the contact area between the casing 20 and the concrete sealing plug 42 and improve the connection strength between the casing 20 and the sealing plug 42. The setting of multiple layers of anchoring belts 41 can further improve the connection strength between the casing 20 and the sealing plug 42.

[0057] In the present application, since the support unit 30 can provide the supporting force of the casing 20 in the vertical direction, the support unit 30 and the anchor unit 40 (including the anchor belt 41 and the sealing plug 42) can simultaneously bear the weight of the casing 20 itself and the weight of the attached pipes and equipment of the casing 20, which can reduce the force of the anchor belt 41 and the sealing plug 42, improve the bearing capacity of the sealing plug 42 and the anchor belt 41, and improve the structural stability of the sealing plug 42 and the anchor belt 41. It can also prevent the sealing plug 42 and the anchor belt 41 from being damaged, thereby preventing the casing 20 from falling into the cave tank, the leakage of the stored product in the cave tank, and the safety of the stored products in the underground water-sealed cave storage.

[0058] Since the support unit 30 and the anchor unit 40 (including the anchor belt 41 and the sealing plug 42) can bear the weight of the casing 20 itself and the weight of the associated pipes and equipment of the casing 20 at the same time, the casing installation assembly in the present application can also be used for the installation of large-sized and long-section casing 20 in the operating shaft 10, and can ensure the stability of the position of the casing 20, thereby improving the practicality and applicability of the casing 20.

[0059] When the bottom of the support unit 30 is connected to the inner wall 12 of the operating shaft 10, in order to facilitate the support unit 30 to support the casing 20, please refer to Figure 1 , Figure 3 and Figure 4 The supporting unit 30 includes a supporting member 31 and a first hanging block 32 .

[0060] The support member 31 is used to provide support for the first hanging block 32. The first hanging block 32 can be welded to the peripheral side of the operating end 21 of the sleeve 20, and the first hanging block 32 is located above the support member 31 in the vertical direction. Then, the first hanging block 32 can be hung on the support member 31 under the weight of the sleeve 20. The support member 31 can provide the sleeve 20 with an upward supporting force in the vertical direction through the first hanging block 32, which can reduce the force of the sleeve 20 on the anchor belt 41 and the sealing plug 42. It should be noted that in some embodiments, the first hanging block 32 can also be connected to the sleeve 20 by screwing or plugging. The connection method can be set according to actual needs and is not limited in this application.

[0061] The support member 31 includes a first casing support 311, a support beam 315 and an elastic member 316. A positioning steel plate (not shown) is installed in the soil layer of the inner wall 12 at a position corresponding to the support member 31 in the operating shaft 10, and the support beam 315 can be welded to the positioning steel plate to achieve a stable positioning of the support beam 315. The first casing support 311 is provided with a first hanging hole 314 for the casing 20 to be sleeved (see Figure 3), The elastic member 316 is connected between the first sleeve bracket 311 and the support beam 315. The sleeve 20 is sleeved in the first hanging hole 314, and the first hanging block 32 is hung on the side of the first sleeve bracket 311 away from the elastic member 316. Under the elastic force of the elastic member 316, the first sleeve bracket 311 can provide an upward vertical supporting force for the sleeve 20 to resist the downward gravity generated by the weight of the sleeve 20 itself and the attached pipes and equipment of the sleeve 20, thereby reducing the stress on the anchoring belt 41 and the sealing plug 42 and improving the structural stability of the sealing plug 42 and the anchoring belt 41.

[0062] A plurality of first hanging blocks 32 can be provided and spaced around the circumference of the sleeve 20, which can provide multi-point support for the first sleeve bracket 311 and improve the supporting stability of the first sleeve bracket 311 for the sleeve 20 through the plurality of first hanging blocks 32.

[0063] In some embodiments, the first cushion block 531 can also be set in a ring shape and surround the circumference of the sleeve 20. The form and position of the first hanging block 32 can be set according to actual needs, and the present application does not make any limitations.

[0064] To facilitate sleeving the sleeve 20 into the first hanging hole 314, please refer to Figures 3 to 4 , The first sleeve bracket 311 includes two clamping members 312. The clamping members 312 can be set in an arc shape. The two clamping members 312 are connected and surrounded to form the first hanging hole 314. Since the cross-section of the sleeve 20 is usually circular, the first hanging hole 314 is set in a circular shape, which can make the two clamping members 312 respectively fit the outer side wall of the sleeve 20 and improve the supporting stability of the two clamping members 312 for the sleeve 20. The two clamping members 312 respectively extend a certain length in the vertical direction, which can increase the contact area with the sleeve 20 in the vertical direction and further improve the connection stability between the two clamping members 312 and the sleeve 20; at the same time, connection ears 313 can be respectively arranged on both sides of the clamping member 312, and the extension length of the clamping member 312 in the vertical direction can also increase the length of the connection ear 313 in the vertical direction. The two clamping members 312 can be firmly connected by bolts through the two connection ears 313 to improve the overall stability of the first sleeve bracket 311.

[0065] The clamping member 312 can be supported by a metal material, such as steel and iron, etc. Please refer to Figure 3 , An abutting member 317 can be fastened to the inner sides of the two clamping members 312. The abutting member 317 can be polytetrafluoroethylene, etc., to achieve current insulation between the clamping member 312 and the sleeve 20 and protection for the sleeve 20.

[0066] The elastic member 316 can be set as a spring. In this application, two springs can be provided. One end of the spring abuts against the support beam 315, and the other end abuts against the position where the two connecting ears 313 are fastened by bolts. To improve the support stability of the spring, please refer to Figure 4 , a support plate 318 can also be welded at the position where the two connecting ears 313 are fastened by bolts, making the support plate 318 perpendicular to the connecting ears 313. Then the support plate 318 can be parallel to the abutting surface on the support beam 315, so that the spring can be stably installed between the support plate 318 and the abutting surface on the support beam 315, improving the installation stability of the spring.

[0067] In some embodiments, the first sleeve bracket 311 can further include a plurality of clamping members 312. The plurality of clamping members 312 are connected and enclose a first hanging hole 314. Then a plurality of springs are required to support the clamping members 312, which can improve the stability of the spring supporting the first socket bracket along the circumferential side of the sleeve 20.

[0068] The lengths of the plurality of clamping members along the circumferential side of the sleeve 20 can be equal, improving the uniformity and stability of the spring supporting the first socket bracket along the circumferential side of the sleeve 20. In some embodiments, the lengths of the plurality of clamping members along the circumferential side of the sleeve 20 can also be unequal, which can be set according to actual needs and is not limited in this application.

[0069] It should be noted that, please refer to Figure 1 , Figure 3 and Figure 4 , the spring is clamped between the first sleeve bracket 311 and the support beam 315, and the first lifting block 32 is located on the side of the first sleeve bracket 311 away from the spring. When the sleeve 20 is hung on the first sleeve bracket 311 by its own weight, under the action of the spring, the sleeve 20 can have a moving margin in the vertical direction. In this way, the deformation amount generated when the sleeve 20 expands and contracts due to temperature changes can also be balanced by the spring, improving the stability of the sleeve 20 in the operation shaft 10.

[0070] Since the length of the sleeve 20 is usually 100m - 250m, then the middle part of the sleeve 20 in the vertical direction will produce an offset. When the offset amount is large, it will jam the connecting pipe lowered along the sleeve 20 and the equipment installed at the depth of the cave tank. To prevent the equipment installed at the depth of the cave tank from being stuck at the middle position in the sleeve 20, please refer to Figure 1 and Figure 5 , the sleeve installation assembly further includes a first constraint unit 50. The first constraint unit 50 connects the inner side wall 12 of the operation shaft 10 and the sleeve 20, and can position the distance between the sleeve 20 and the inner side wall 12 of the operation shaft 10, thereby restricting the horizontal displacement of the sleeve 20.

[0071] In this application, four groups of first constraint units 50 are arranged along the extending direction of the casing 20. In some embodiments, multiple first constraint units 50 are usually provided. The multiple first constraint units 50 are arranged at intervals along the extending direction in the vertical direction. In this way, different positions of the casing 20 along the extending direction can be positioned in the vertical direction. Thus, through the constraints of the multiple first constraint units 50, the casing 20 can extend in the vertical direction, so that the connecting pipeline and the equipment installed at the depth of the hole tank can be smoothly lowered into the operation shaft 10 in the vertical direction.

[0072] Please refer to Figure 5 , the first constraint unit 50 includes a constraint bracket 51 and a pipe clamp 52. A positioning steel plate (not shown in the figure) is installed in the soil layer of the inner side wall 12 at the position corresponding to the constraint bracket 51 in the operation shaft 10. The two ends of the constraint bracket 51 can be welded to the positioning steel plate or installed on the positioning steel plate by screws. The installation method can be set according to the actual situation, and this application does not make a limitation.

[0073] The pipe clamp 52 can be set as a U-shaped pipe clamp. The two sides of the U-shaped pipe clamp 52 are respectively threadedly connected to the constraint bracket 51, and a surrounding hole 521 is formed by enclosing with the constraint bracket 51. The casing 20 is held in the surrounding hole 521. In this way, the displacement of the casing 20 in the horizontal direction can be limited by the pipe clamp 52 and the constraint bracket 51. The displacement of the casing 20 in the horizontal direction can be adjusted by the length of the constraint bracket 51 extending into the operation shaft 10 on the inner side wall 12 of the operation shaft 10 and the threaded length of the side of the pipe clamp 52 and the constraint bracket 51, so that the casing 20 extends in the vertical direction. The bottom edge of the U-shaped pipe clamp 52 is set as an arc shape to fit the outer side wall of the casing 20, increasing the contact area between the outer side wall of the casing 20, and improving the stability of the pipe clamp 52 supporting the casing 20.

[0074] When adjusting the threaded length of the side of the pipe clamp 52 and the constraint bracket 51, in order to ensure that the outer side wall of the casing 20 fits with the pipe clamp 52 and the constraint bracket 51, the first constraint unit 50 further includes a cushioning member 53. Four cushioning members 53 can be provided. Three of them are respectively installed on the bottom edge and the two side edges of the U-shaped pipe clamp 52 and are in contact with the casing 20; the other one is installed on the constraint bracket 51 and is in contact with the casing 20. In this way, the circumferential side of the casing 20 can be supported by the cushioning member 53, improving the position stability of the casing 20 compared with the constraint bracket 51 and the pipe clamp 52.

[0075] According to actual requirements, the cushioning member 53 can be connected to the pipe clamp 52 and located between the pipe clamp 52 and the casing 20, or the cushioning member 53 can be connected to the constraint bracket 51 and located between the constraint bracket 51 and the casing 20, or the cushioning member 53 can be respectively connected between the pipe clamp 52 and the casing 20 and between the constraint bracket 51 and the casing 20 at the same time. It is set according to the actual situation, and this application does not make a limitation.

[0076] The spacer 53 may include a spacer block 531 and an abutting block 532. The material of the spacer block 531 may be steel or the like and is welded to the pipe clamp 52. The abutting block 532 may be polytetrafluoroethylene or the like and abuts against the sleeve 20, so as to achieve current insulation between the restraint bracket 51 and the pipe clamp 52 and the sleeve 20 and protection for the sleeve 20.

[0077] It should be noted that the restraint bracket 51 and the pipe clamp 52 are used to limit the displacement of the sleeve 20 in the horizontal direction. In some embodiments, according to the engineering requirements, multiple sleeves 20 can be lowered simultaneously in the same operation shaft 10. The restraint bracket 51 can be fixed to other adjacent sleeves 20, so that multiple sleeves 20 can be connected simultaneously through the restraint bracket 51 and the pipe clamp 52. The mutual support between multiple sleeves 20 can prevent the displacement of the sleeve 20 in the horizontal direction and make the sleeve 20 extend in the vertical direction.

[0078] Before pouring concrete into the operation shaft 10 at the position corresponding to the anchoring belt 41, at the end of the anchoring belt 41 close to the sleeve 20, the thermal expansion and contraction of the sleeve 20 due to temperature changes or other factors will cause the sleeve 20 to expand and contract in the vertical direction near the end (the position where the anchoring belt 41 is welded to the sleeve 20), damaging the formation of the sealing plug 42 and affecting the firmness of the anchoring of the sleeve 20. In order to reduce the expansion and contraction amount of the sleeve 20 near the end, the second restraint unit 60 includes a second sleeve bracket 61 and a second hanging block 62.

[0079] Before installing the second sleeve bracket 61 and the second hanging block 62, two groups of restraint brackets 51 can be installed in the operation shaft 10 in the vertical direction at a position close to the anchoring belt 41, and the two groups of restraint brackets 51 are arranged at intervals.

[0080] The second sleeve bracket 61 is installed above the restraint bracket 51 close to the anchoring belt 41. The second sleeve bracket 61 is provided with a second hanging hole (not shown in the figure) for the sleeve 20 to be sleeved. The sleeve 20 is sleeved in the second hanging hole. The second hanging block 62 can be welded to the circumferential side of the sleeve 20, and the second hanging block 62 is located above the second sleeve bracket 61 in the vertical direction. The second sleeve bracket 61 and the second hanging block 62 are clamped between two adjacent groups of restraint brackets 51. The two groups of restraint brackets 51 can provide resistance to the sleeve 20 in the vertical upward direction, and can prevent the position of the part of the sleeve 20 where the second hanging block 62 is installed from moving vertically upward or vertically downward, so as to reduce the expansion and contraction position of the part of the sleeve 20 where the anchoring belt 41 is welded due to thermal expansion and contraction. Then, the concrete is poured in layers to the position of the anchoring belt 41 to form the sealing plug 42.

[0081] In order to stably limit the second lifting block 62 between two sets of restraint brackets 51, at least two sets of second sleeve brackets 61 are provided. The second lifting block 62 is clamped between two adjacent second sleeve brackets 61. One side of the second sleeve bracket 61 away from the second lifting block 62 abuts against two adjacent restraint brackets 51 respectively. Since the positions of two adjacent restraint brackets 51 are fixed, the second lifting block 62 abuts against two adjacent restraint brackets 51 through two sets of second sleeve brackets 61 respectively, so as to limit the displacement of the sleeve 20 in the vertical direction.

[0082] It should be noted that two sets of restraint brackets 51 can be provided in the same horizontal direction. The two sets of restraint brackets 51 can increase the contact area with the second sleeve bracket 61 and improve the support stability of the second sleeve bracket 61 and the second lifting block 62. In some embodiments, multiple sets of restraint brackets 51 can also be provided in the same horizontal direction, which can be set according to actual needs and is not limited in this application.

[0083] It should be noted that the structure of the second lifting block 62 is the same as that of the above-mentioned first lifting block 32, and the structure of the second sleeve bracket 61 is the same as that of the above-mentioned first sleeve bracket 311. The connection relationship and positional relationship of the second lifting block 62 and the second sleeve bracket 61 can refer to the above-mentioned first lifting block 32 and the first sleeve bracket 311, which will not be elaborated here.

[0084] During the curing period of the reinforced concrete structure, since the two sets of restraint brackets 51 reduce the expansion and contraction displacement generated by the thermal expansion and contraction of the part where the sleeve 20 is welded with the anchoring belt 41, the displacement amount of the anchoring belt 41 on the sleeve 20 in the sealing plug 42 of the reinforced concrete structure can be reduced, and the connection tightness and connection strength between the anchoring belt 41 and the sealing plug 42 of the reinforced concrete structure, as well as the anchoring stability of the sleeve 20 can be improved. Since the connection tightness between the anchoring belt 41 and the sealing plug 42 of the reinforced concrete structure is improved, the gap between the anchoring belt 41 and the sealing plug 42 can be reduced, preventing the water injection in the operation shaft 10 from leaking to the tunnel tank through the gap between the anchoring belt 41 and the sealing plug 42.

[0085] After the reinforced concrete is stably solidified, the sealing plug 42 is firmly connected to the anchoring belt 41 on the circumferential side of the sleeve 20, realizing the stable anchoring of the sleeve 20 in the operation shaft 10. The firm connection between the sealing plug 42 and the anchoring belt 41 can apply a fixed binding force to the sleeve 20, preventing the sleeve 20 from displacing in the vertical and horizontal directions and improving the position stability of the sleeve 20 in the operation shaft 10. While the sealing plug 42 and the anchoring belt 41 bear the self-weight of the sleeve 20 and the weight of the auxiliary pipes and equipment of the sleeve 20, the sealing plug 42 also has a water-stop function, preventing the water above the sealing plug 42 in the operation shaft 10 from flowing to the lower part.

[0086] After the sleeve 20 is stably anchored in the operation shaft 10, the second sleeve bracket 61 and the second hanging block 62 can be removed, so that the telescopic displacement of the sleeve 20 above the sealing plug 42 in the vertical direction due to thermal expansion and contraction can be balanced by the spring, improving the stability of the sleeve 20 in the operation shaft 10.

[0087] In this application, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include indirect contact between the first and second features through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0088] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0089] In this application, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0090] In addition, in this application, descriptions such as "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "a plurality" means two or more, unless otherwise clearly and specifically defined.

[0091] Although embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A casing installation assembly is installed in an operation shaft, characterized in that, The casing installation assembly includes: A casing, sleeved in the operation shaft with a gap and having an operation end extending out of the operation shaft; A support unit, arranged at the wellhead of the operation shaft, the upper part of the support unit is connected to the operation end, and the lower part is connected to the inner side wall of the operation shaft or the construction site outside the wellhead of the operation shaft. The support unit is used to support the casing in the vertical direction; An anchoring unit, connecting the lower part of the casing and the inner side wall of the operation shaft.

2. The casing installation assembly according to claim 1, characterized in that, Under the condition that the lower part of the support unit is connected to the inner side wall of the operation shaft, the support unit includes: A support member, connected to the inner side wall of the operation shaft; A first hanging block, connected to the periphery of the operation end of the casing, and the first hanging block is hung on the support member.

3. The casing installation assembly according to claim 2, characterized in that, The support member includes: A first casing support, provided with a first hanging hole for the casing to be sleeved; A support beam, connected to the inner side wall of the operation shaft; An elastic member, connected between the first casing support and the support beam.

4. The casing installation assembly according to claim 3, characterized in that The first casing support includes: A plurality of clamping members, the plurality of clamping members are connected and enclose to form the first hanging hole, and the elastic member abuts against the connection position between two adjacent clamping members.

5. The casing installation assembly according to any one of claims 1-4, characterized in that The casing installation assembly further includes: A plurality of first constraint units, arranged at intervals along the vertical direction, and the first constraint units connect the inner side wall of the operation shaft and the casing.

6. The casing installation assembly according to claim 5, wherein, The first constraint unit includes: A constraint support, installed on the inner side wall of the operation shaft; A pipe clamp, connected to the constraint support and enclosing to form a surrounding hole with the constraint support, and the casing is clamped in the surrounding hole.

7. The casing installation assembly according to claim 6, wherein, The first constraint unit further includes: A cushioning member, connected to the pipe clamp and located between the pipe clamp and the casing; and / or, connected to the constraint support and located between the constraint support and the casing.

8. The casing installation assembly according to claim 6, characterized in that, A second constraint unit is also arranged between some adjacent first constraint units for connection, and the second constraint unit is connected to the casing.

9. The casing installation assembly according to claim 8, characterized in that, The second constraint unit includes: A second casing support, provided with a second hanging hole for the casing to be sleeved, and the second casing support abuts against the constraint support; A second hanging block, connected to the periphery of the casing and abutting against the side of the second casing support away from the constraint support.

10. The casing installation assembly according to claim 9, characterized in that, Two groups of the second casing supports are provided, the second hanging block is clamped between the two second casing supports, and the sides of the second casing supports away from the second hanging block respectively abut against two adjacent constraint supports.

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