Prefabricated pipe gallery connecting assembly and its overhauling method

Abstract

A prefabricated pipe gallery connecting assembly and its maintenance method, the connecting assembly comprises a first protrusion vertically arranged at both sides of the edge of the pipe gallery passage opening, and a first connecting piece is arranged between the first protrusions of adjacent pipe gallery units, which can connect the two first protrusions; a plurality of inclined downward flow guide grooves are arranged from top to bottom at both sides of the flow guide section, a first flow guide hole is arranged in the flow guide section and communicates with the corresponding flow guide groove, the first flow guide hole communicates with a second flow guide hole, and the second flow guide hole is inclined downward and opens to the outside of the first sealing section. The upper and lower sides of the connecting part are connected and sealed by the cooperation of the second protrusion and the second connecting piece, and the first connecting piece comprises a flow guide section, and rainwater seeping into the gap between the first connecting piece and the first protrusion can be guided into the flow guide hole through the cooperation of the plurality of flow guide grooves and the flow guide hole, and finally flows back to the outside of the first sealing section, so that the form of guiding seepage water replaces various forms of improving sealing.

Description

Technical Field

[0001] This invention relates to the field of pipe gallery connection technology, specifically to a prefabricated pipe gallery connection component and its maintenance method. Background Technology

[0002] Underground utility tunnels refer to shared municipal tunnel spaces built underground in cities, where municipal utility lines such as electricity, communications, and water supply are laid together in a single structure according to planning requirements. To improve construction efficiency and shorten the construction period, precast utility tunnels are now widely used instead of traditional cast-in-place construction. The construction process of precast utility tunnels involves hoisting one section into the excavated pit, installing a connector on one side for connection and waterproofing, then hoisting another section of the precast utility tunnel and installing it at the connector, and so on, installing all the utility tunnels in the pit.

[0003] The existing pipe rack connections use waterstops, but in actual use, pipe rack settlement often causes the waterstops to deform and fail, resulting in leaks in multiple locations. This has a certain impact on the equipment inside the pipe rack and requires frequent repairs. Since the pipe rack is installed in a foundation pit, which is excavated downwards, the upper opening is easy to seal when backfilling the pit. However, the sides of the pipe rack are the original soil, which accumulates a lot of rainwater over time. No matter how well the sides of the pipe rack connection are sealed, leaks will occur at the contact point between the connector and the pipe rack, slowly entering the interior of the pipe rack. Furthermore, the connectors are usually fixed to the pipe rack, allowing only repairs and not disassembly for inspection or replacement. Summary of the Invention

[0004] To address the above problems, the present invention provides a prefabricated pipe gallery connection component and its maintenance method.

[0005] The technical solution of this invention is as follows:

[0006] A prefabricated pipe gallery connection assembly, wherein the prefabricated pipe gallery includes pipe gallery units that are buried adjacent to each other in a foundation pit, and the adjacent pipe gallery units are connected by a connection assembly. The connection assembly includes a first protrusion vertically arranged on both sides of the pipe gallery passage opening, and a first connector is provided between the first protrusions of adjacent pipe gallery units, which can connect two adjacent first protrusions.

[0007] The first protrusion has a first receiving groove and a second receiving groove vertically opened at the inner and outer sides of the end away from the tube rack unit, respectively. The first connector includes a first sealing part inserted into the first receiving groove and a second sealing part fastened in the second receiving groove. The second sealing part is detachably installed with the first protrusion, and the first sealing part and the second sealing part extend to the first protrusion of the adjacent tube rack and abut against each other.

[0008] The first sealing part includes a first sealing section inserted into the first receiving groove and a guide section extending between two first protrusions. The guide section has a plurality of downwardly inclined guide grooves on both sides. The guide section has a first guide hole that communicates with the corresponding guide groove and is inclined downward inside. The first guide hole communicates with a second guide hole, and the second guide hole is inclined downward to the outside of the first sealing section.

[0009] The connecting assembly also includes a second protrusion horizontally installed on the upper and lower sides of the edge of the pipe gallery passage, and the second protrusion is arranged perpendicularly to the first protrusion. The second protrusions of two adjacent pipe gallery units abut against each other and are connected by a second connector. The second connector is fastened to the outside of the two abutting second protrusions.

[0010] To facilitate the lifting of the second sealing part in step four of the maintenance method, the first protrusion extends outward relative to the second protrusion in the horizontal direction, and the distance between the two adjacent vertical and parallel planes is not less than the thickness of the portion of the second sealing part extending from the first protrusion.

[0011] The specific structure of the second sealing part is as follows: the second sealing part includes a second sealing section that is fastened into the second receiving groove and an extension section that extends between the two first protrusions, and the extension section abuts against the guide section; the cooperation of the second sealing section and the extension section seals the inside of the first protrusion.

[0012] The second sealing section has overlapping sections at both ends, which can overlap with the first protrusion on one side of the second receiving groove, and the second sealing section and the overlapping sections are fixed to the first protrusion by fasteners. The overlapping sections can improve the stability of the fixation to the first protrusion.

[0013] To facilitate the fixing of the first sealing section, strip-shaped insertion parts are provided on both sides of the first sealing section, and the first protrusion is provided with a strip-shaped insertion groove for insertion of the strip-shaped insertion parts.

[0014] To improve the sealing performance of the pipe gallery passage opening and to prevent the second connector from protruding from the upper surface of the pipe gallery unit, the length of the first protrusion is consistent with the height of the pipe gallery passage opening of the pipe gallery unit, the length of the second protrusion is 4 / 5-5 / 6 of the length of the first protrusion, and the outer surface of the pipe gallery unit extends outward relative to the outer end face of the second protrusion in the vertical direction.

[0015] The specific structure of the second connector is as follows: the second connector includes a fastening part with a U-shaped opening, the two ends of the opening of the fastening part abutting against the first protrusion, and the inner side of the U-shaped opening abutting against the second protrusion.

[0016] To improve the stability of the second connector and the second protrusion, the bottom of the fastening part is provided with a strip-shaped limiting member perpendicular to its longer side, and the outer side of the second protrusion is provided with a limiting groove that matches the limiting member.

[0017] To improve the stability of the connection between two adjacent utility tunnel units, a number of positioning rods are arranged from top to bottom at one end of the utility tunnel unit, and the positioning rods are located inside the first protrusion. The other end of the utility tunnel unit is provided with a positioning hole for the insertion of the positioning rod of another utility tunnel unit.

[0018] To ensure the sealing performance of the connection between the guide section and the extension section and to improve the stability of the connection, the extension section has several glue storage grooves from top to bottom on the end face near the guide section. The extension section has several glue filling holes that communicate with the corresponding glue storage grooves. The glue filling holes are opened through one side of the second sealing section, and the sealant can be added to the glue storage groove through the glue filling holes.

[0019] To facilitate the inspection and cleaning of the guide groove and guide hole in the first connector, a cleaning hole is provided in the guide section, and the cleaning hole is connected to the first guide hole. When the second sealing part is in a sealed state, the glue-filling hole is located above the cleaning hole in the vertical direction, and the two are aligned in the horizontal direction.

[0020] A maintenance method for a precast pipe gallery connection component, applied to a precast pipe gallery connection component, includes the following steps:

[0021] Step 1: Apply adhesive remover to the joint between the second connector and the pipe rack unit and the first protrusion. After the sealant at the joint softens, disassemble the second connector.

[0022] Step 2: Inject adhesive remover through the glue injection hole, wait for the sealant in the glue storage tank to soften, and then remove it from the fixed position of the second sealing part.

[0023] Step 3: Scrape off any residual sealant inside the glue storage tank and on the end face of the guide section;

[0024] Step 4: Cover the inside of the first protrusion with the second sealing part, and lift the second sealing section upward along the second receiving groove. The extension section slides upward along the guide section along with the second sealing section until the glue hole and the cleaning hole are aligned.

[0025] Step 5: Connect the high-pressure water flow to the glue injection hole, let it enter the first guide hole along the cleaning hole, and finally flow out of the second guide hole to complete the cleaning.

[0026] Step six: Slide the second sealing section raised in step four down along the second receiving groove until the upper and lower end faces of the second sealing section are flush with the upper and lower end faces of the first protrusion, respectively. Then, introduce a high-temperature airflow into the glue filling hole to dry the glue storage tank.

[0027] Step 7: Refill the sealant into the glue storage tank through the glue filling hole to seal and bond the guide section to the second sealing part, and fix the second sealing part to the first protrusion in a fixed position.

[0028] Step 8: Cover the outside of the second protrusion with the second connector at the upper end, and apply sealant at the connection between the connector and the pipe gallery unit and the first protrusion.

[0029] The beneficial effects of this invention are as follows: This invention provides a prefabricated pipe gallery connection assembly and its maintenance method. The assembly between adjacent pipe gallery units can fix and seal the two units. Specifically, a first connector, in conjunction with a first protrusion, further seals the side of the pipe gallery connection. Then, a second protrusion, in conjunction with a second connector, seals the upper and lower sides of the connection. The first connector includes a guide section; through several guide grooves and interconnected guide holes, rainwater seeping into the gap between the first connector and the first protrusion can be guided into the guide holes and ultimately flow back to the first... On the outside of the sealing section, the method of guiding leakage water replaces various sealing methods. On the one hand, it reduces the sealing cost at the connection, and on the other hand, it greatly reduces the water seeping into the pipe gallery by diverting the water. Secondly, by setting up a detachable second sealing part, the glue-applied part between the flow guiding section and the extension section, as well as the flow guiding hole and the flow guiding groove, can be regularly inspected and cleaned through the cooperation of the glue-applied hole and the cleaning hole. This ensures the adhesion of the sealant in the sealing part to improve the sealing performance, and also ensures the cleanliness and smoothness of the flow guiding groove and the flow guiding hole, ensuring the normal diversion of leakage water. Attached Figure Description

[0030] The solutions and advantages of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention.

[0031] In the attached diagram:

[0032] Figure 1 Top view of the installation of two adjacent utility tunnel units;

[0033] Figure 2 This is a magnified view of point A;

[0034] Figure 3 Top view of the first connector installation;

[0035] Figure 4 This is a magnified view of point B;

[0036] Figure 5 This is a partial side view of the first connector;

[0037] Figure 6 This is a partial front view of the first connector;

[0038] Figure 7 This is a partial rear view of the first connector;

[0039] Figure 8 Front view of the first and second connectors during installation;

[0040] Figure 9 Side view of the second connector;

[0041] The components represented by the various reference numerals in the diagram are:

[0042] 1. Pipe gallery unit; 11. Pipe gallery access point; 2. First protrusion; 21. First receiving groove; 22. Second receiving groove; 23. Insertion groove; 3. First connector; 31. First sealing part; 311. First sealing section; 312. Guide section; 313. Guide groove; 314. First guide hole; 315. Second guide hole; 316. Insertion part; 317. Cleaning hole; 32. Second sealing part; 321. Second sealing section; 322. Extension section; 323. Overlap section; 324. Glue storage tank; 325. Glue filling hole; 4. Second protrusion; 41. Limiting groove; 5. Second connector; 51. Fastening part; 52. Limiting component; 6. Fixing component; 7. Positioning rod; 8. Positioning hole. Detailed Implementation

[0043] Exemplary embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. It should be noted that these embodiments are provided to enable a more thorough understanding of this disclosure and to fully convey the scope of this disclosure to those skilled in the art. This disclosure can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0044] Example

[0045] As mentioned in the background section, existing underground utility tunnel units 1 use waterstops for sealing connections. The inventors have found that during actual use, due to settlement of the utility tunnel body, leakage is very likely to occur at the connection points. For the structure of the foundation pit, the downward excavation method allows for multiple anti-leakage methods at the upper and lower ends of the utility tunnel body, and multiple waterproof layers can be laid, which can still prevent leakage during settlement. However, the sides of the utility tunnel are original soil, which may contain a lot of rainwater. No matter how it is sealed, leakage will occur at the joints over time. The leaking rainwater will not only cause the sealant in other parts to fail, but also make the inside of the utility tunnel unit 1 relatively damp, affecting the normal use of the internal equipment. Therefore, the inventors have improved and innovated on the existing connectors, designing a method that can divert water instead of sealing to reduce water leakage. The following is a detailed explanation with reference to the illustrations.

[0046] This embodiment discloses a prefabricated pipe gallery connection component, combined with... Figure 1 The first connector 3 and the second connector 5 are not installed in the figure. The prefabricated pipe gallery includes pipe gallery units 1 that are buried adjacent to each other in the foundation pit. Multiple pipe gallery units 1 connected end to end form a pipe gallery channel for installing power or hydraulic equipment. Adjacent pipe gallery units 1 need to be connected and sealed. In this embodiment, a connecting component is used to connect the upper, lower, left and right sides of the connection point of the pipe gallery unit 1.

[0047] Specifically, in this embodiment, the utility tunnel unit 1 is rectangular, combined with... Figure 2 The pipe gallery passage 11 is square. The parts that need to be sealed include the vertical edges on both sides and the horizontal edges on the top and bottom sides of the pipe gallery passage 11. The connecting component includes a first protrusion 2 vertically set on both sides of the pipe gallery passage 11. When placing the pipe gallery unit 1, there is a gap between the first protrusion 2 of two adjacent pipe gallery units 1. The existing pipe gallery unit 1 is set with both sides flush. When connecting, a waterstop is directly inserted between two pipe gallery units 1. Once settlement occurs, the shape of the waterstop will be twisted, and the connection part with the pipe gallery unit 1 is prone to breakage. Water in the soil seeps into the pipe gallery through the broken part. The present invention designs the form of the first protrusion 2. A first connecting piece 3 that is adapted to it can be installed at the first protrusion 2. Even if the deformation occurs due to settlement, the seeping water can be discharged.

[0048] The first connector 3 is connected by two adjacent first protrusions 2. The first connector 3 is installed in a manner that combines... Figure 3 and Figure 4 , Figure 3The second connector 5 is not installed. A first receiving groove 21 is vertically formed at the outer end of the first protrusion 2 away from the pipe gallery unit 1. The first connector 3 includes a first sealing part 31 inserted into the first receiving groove 21. The first sealing part 31 includes a first sealing section 311 inserted into the first receiving groove 21. The first sealing section 311 is inserted into the first receiving groove 21 on the outer side of the first protrusion 2 and is connected to the contact area of ​​the first protrusion 2 by sealant. Furthermore, to improve the stability of the first sealing section 311 and achieve insertion into the first receiving groove 21, strip-shaped insertion portions 316 are provided on both sides of the first sealing section 311. The length of the insertion portions 316 is the same as the length of the first sealing section 311. Moreover, the cross-sectional shape is a combination of trapezoidal and rectangular. The trapezoidal part is designed to be far away from the first sealing section 311, which facilitates the snap-fit ​​during installation. In order to achieve the snap-fit, the first protrusion 2 is provided with a strip-shaped insertion groove 23 for the strip-shaped insertion part 316 to be inserted. When installing the first sealing section 311, it is inserted from top to bottom along the first receiving groove 21. At the same time, the disassembly part slides down along the insertion groove 23, and the two form a snap-fit. Unlike the existing waterstop and pipe gallery unit which adopt a horizontal insertion form, the first sealing section 311 and the first protrusion 2 adopt a vertical insertion form. Even if settlement occurs, the insertion part of the first sealing section 311 and the first protrusion 2 will not break and can still play a sealing role.

[0049] Based on the above structure, one of the main technical points of this solution is the combination of... Figure 4 and Figure 5 The first sealing part 31 also includes a guide section 312 extending between the two first protrusions 2. The guide section 312 has several downwardly inclined guide grooves 313 on both sides, which are the sides where the guide end contacts the two adjacent first protrusions 2. The guide section 312 has a downwardly inclined first guide hole 314 communicating with the corresponding guide groove 313. That is, the end of the guide groove 313 away from the first protrusion 2 communicates with the first guide hole 314. The extension direction of the first guide hole 314 is towards the side away from the first protrusion 2 on the same side. The bottom ends of the two first guide holes 314 connected by the two guide grooves 313 at the same height are connected, and both are connected to a second guide hole 315. Figure 6Furthermore, the second guide hole 315 is inclined downwards and leads to the outside of the first sealing section 311. The purpose of the downward inclination of the second guide hole 315 is not only to guide the flow, but also to prevent water in the contacted soil from seeping into the second guide hole 315. In order to reduce the amount of soil entering the second guide hole 315, a filter screen can be installed on the outside of the second guide hole 315 to isolate the soil while allowing the water to flow out. The water that seeps into the joint between the first sealing section 311 and the first protrusion 2 can flow into the guide groove 313 at different heights, and then flow along the guide groove 313 into the first guide hole 314, and finally flow outwards through the connected second guide hole 315.

[0050] In this embodiment, a second receiving groove 22 is also provided on the inner side of the first protrusion 2. The width of the second receiving groove 22 is smaller than the width of the entire first protrusion 2. The corresponding first connector 3 also includes a second sealing part 32 that is fastened to the second receiving groove 22. The second sealing part 32 and the first protrusion 2 are detachably installed. Specifically, the second sealing part 32 includes a second sealing section 321 that is fastened to the second receiving groove 22 and an extension section 322 that extends between the two first protrusions 2. In order to improve the sealing connection effect between the first protrusions 2, the extension section 322 and the guide section 312 abut against each other. The existing integrated design of the waterstop has two problems: firstly, the entire waterstop cannot play a normal sealing role when it breaks; secondly, the waterstop cannot be disassembled and repaired, and it will age or even be damaged after long-term use, making it difficult to replace and repair. In this design, the first connector 3 adopts a split form, and the internal second sealing part 32 is detachably connected to the first protrusion 2. It can be replaced or re-applied with sealant to ensure the sealing effect.

[0051] Based on the above structure, the second sealing section 321 is provided with overlapping sections 323 at both ends. The overlapping sections 323 extend onto the first protrusion 2 on one side of the second receiving groove 22 and can overlap with the first protrusion 2, and are in close contact with the first protrusion 2. In order to make the second sealing part 32 and the first protrusion 2 more stable and convenient for disassembly, the second sealing section 321 and the overlapping section 323 are fixed to the first protrusion 2 by the fastener 6. In this embodiment, the fastener 6 can be fixed by multiple fastening bolts arranged from top to bottom.

[0052] The above-mentioned connection and sealing of the left and right sides of the connection position of the adjacent pipe gallery unit 1 has been completed. It is also necessary to connect and seal the upper and lower sides of the connection position. The connection component also includes a second protrusion 4 horizontally installed on the upper and lower sides of the edge of the pipe gallery channel 11. The second protrusion 4 is arranged perpendicular to the first protrusion 2, that is, it is horizontally set on the upper and lower edges of the pipe gallery channel 11. Unlike the first protrusion 2, the two adjacent second protrusions 4 abut against each other, and a second connector 5 is provided on the outside of the second protrusion 4. Specifically, the two second protrusions 4 are connected and sealed by a snap-fit ​​method.

[0053] Specifically, the second connector 5 includes a snap-fit ​​portion 51 with a U-shaped opening, which, when combined with... Figure 8 and Figure 9 The two ends of the opening of the fastening part 51 abut against the first protrusion 2. That is, the two ends of the opening of the fastening part 51 of the upper and lower two second connecting parts 5 respectively contact the upper and lower ends of the first protrusion 2. The inner side of the U-shaped opening abuts against the second protrusion 4. In order to ensure the stability of the second connecting parts 5 after fastening, the bottom of the fastening part 51 is provided with a strip-shaped limiting member 52 perpendicular to its longer side, and multiple limiting members 52 are provided. The outer side of the second protrusion 4 is provided with a limiting groove 41 that matches the limiting member 52. After the fastening part 51 is fastened, the limiting member 52 can be locked in the limiting groove 41 to prevent the fastening part 51 from shaking. When installing the second connecting part 5, the second connecting part 5 located at the lower end should be connected to the second protrusion 4 of the previous pipe gallery unit 1 before the second pipe gallery unit 1 is placed, with the opening facing upward. Then the second pipe gallery unit 1 is placed above the second connecting part 5 so that the limiting member 52 and the limiting groove 41 cooperate.

[0054] It should be noted that the thickness of the first protrusion 2 and the second protrusion 4 is less than the wall thickness of the tube rack unit 1, and the outer end face of the first protrusion 2 is flush with the outer end face of the tube rack unit 1. However, the first receiving groove 21 is located inside the outer side of the tube rack unit 1, and the inner end face of the second protrusion 4 is flush with the inner end face of the tube rack unit 1, ensuring that the second connecting piece 5 is flush with the upper and lower outer sides of the tube rack unit 1 after being fastened.

[0055] Furthermore, to improve the stability of the connection between adjacent utility tunnel units 1, a number of positioning rods 7 are arranged from top to bottom at one end of each utility tunnel unit 1, and the positioning rods 7 are located inside the first protrusion 2. The other end of each utility tunnel unit 1 is provided with a positioning hole 8 for the insertion of the positioning rod 7 of another utility tunnel unit 1. When two adjacent utility tunnel units 1 are installed, one utility tunnel unit 1 is hoisted so that the positioning rod 7 is aligned with the positioning hole 8 of the other unit and inserted along the positioning hole 8. The stability is improved by the cooperation of the positioning rod 7 and the positioning hole 8.

[0056] It should be noted that, in this embodiment, in order to facilitate the maintenance of the connecting components, the first protrusion 2 extends outward relative to the second protrusion 4 in the horizontal direction, and the distance between the two adjacent vertical and parallel planes is not less than the thickness of the portion of the second sealing part 32 extending outward from the first protrusion 2, that is, the thickness of the overlapping part. Specifically, the length of the first protrusion 2 is consistent with the height of the pipe gallery channel opening 11 of the pipe gallery unit 1, the length of the second protrusion 4 is 4 / 5-5 / 6 of the length of the first protrusion 2, and the outer side of the pipe gallery unit 1 extends outward relative to the outer end face of the second protrusion 4 in the vertical direction, ensuring that the second connecting piece 5 can be easily disassembled during maintenance, and that after disassembly, the gap between the first protrusion 2 and the second protrusion 4 can ensure that the overlapping part of the second sealing part 32 can be lifted upward.

[0057] In this embodiment, combined with Figure 7 Because of the split design of the first connector 3, there is a gap between the guide section 312 and the extension section 322. When the seepage volume is large, it will flow into the extension section 322 through the guide channel 313. Therefore, in order to strengthen the tightness of the connection between the guide section 312 and the extension section 322, a number of glue storage grooves 324 are formed from top to bottom on the end face of the extension section 322 near the guide section 312. The glue storage grooves 324 are used to hold sealant. In addition, a number of glue filling holes 325 are formed in the extension section 322 that communicate with the corresponding glue storage grooves 324. The glue filling holes 325 are formed through one side of the second sealing section 321, and the sealant can be added into the glue storage grooves 324 through the glue filling holes 325. The injected sealant can bond and seal the guide section 312 and the extension section 322. Previously, the inventors designed a long glue storage tank and directly applied the sealant to the storage tank before connecting the extension section 322 to the guide end 312. However, on the one hand, the glue in the storage tank was very easy to flow to other parts, resulting in glue overflow in many places. On the other hand, after leakage, the sealant in the entire storage tank would be affected, and the sealant area was large, making it difficult for the adhesive remover to work during disassembly. However, by setting multiple glue storage tanks 324 and multiple glue injection holes 325, the sealing connection effect is ensured while facilitating glue injection and subsequent disassembly.

[0058] To facilitate cleaning of the guide channel 313 and guide holes and ensure smooth flow, the design of the aforementioned connecting component structure also facilitates regular maintenance. Multiple sets of cleaning holes 317 are provided within the guide section 312, and these cleaning holes 317 communicate with the first guide hole 314. When the second sealing part 32 is in a fixed state, the cleaning holes 317 are located within the glue storage tank 324. Glue can be injected to seal the cleaning holes 317. The glue injection hole 325 is vertically positioned above the cleaning holes 317. Previously, the inventors designed the cleaning holes 317 and glue injection holes 325 to be at the same vertical height; however, during glue injection, sealant easily enters the guide hole through the cleaning hole 317, potentially damaging the guide hole. Blockage can affect the flow of infiltrated water. This design, however, positions the two parts vertically, so during sealant application, the sealant only covers the cleaning hole 317 and does not flow into the guide hole, ensuring its flow-guiding function. Horizontally, they are aligned, with two cleaning holes 317 per group, each connected to one of the two corresponding first guide holes 314. The connection is made to the end of the first guide hole 314 closest to the first protrusion 2, primarily to ensure that a portion of the high-pressure cleaning water flows into the guide groove 313. During maintenance, raising the second sealing part 32 a certain height aligns the sealant hole 325 with the cleaning hole 317. Specifically, the maintenance method includes the following steps:

[0059] Step 1: Apply adhesive remover to the joint between the second connector 5, the tube rack unit 1, and the first protrusion 2. After the sealant at the joint softens, disassemble the second connector 5, that is, remove the sealant from both sides of the fastening part 51 and the two adjacent tube rack units 1, as well as the sealant from both ends of the opening and the upper end of the first protrusion 2, and clean the sealant from the contact surfaces.

[0060] Step 2: Inject adhesive remover through the glue injection hole 325. After the sealant in the glue storage tank 324 softens, disassemble the second sealing part 32 at the fixed position of the first protrusion 2. That is, in this embodiment, remove the fastening bolts that fix the second sealing section 321 and the overlapping section 323 to the first protrusion 2.

[0061] Step 3: Scrape off the residual sealant in the glue storage tank 324 and on the end face of the guide section 312.

[0062] Step four: Cover the inner side of the first protrusion 2 with the second sealing part 32, and lift the second sealing section 321 upward along the second receiving groove 22. The extension section 322 slides upward along the guide section 312 along with the second sealing section 321 until the glue filling hole 325 is aligned with the cleaning hole 317. The second sealing part 32 moves upward into the gap between the first protrusion 2 and the second protrusion 4. The height of the upward lifting depends on the height difference between the glue filling hole 325 and the cleaning hole 317, so that the glue filling hole 325 is aligned with the cleaning hole 317.

[0063] Step 5: High-pressure water is introduced into the glue-dredging hole 325. The high-pressure water flows along the cleaning hole 317 into the first guide hole 314 and finally flows out of the second guide hole 315, completing the cleaning. A portion of the clean water flows into the guide groove 313 to continue cleaning the guide groove 313.

[0064] Step six: Slide the second sealing section 321 raised in step four down along the second receiving groove 22 until the upper and lower end faces of the second sealing section 321 are flush with the upper and lower end faces of the first protrusion 2, respectively. Introduce a high-temperature airflow into the glue filling hole 325 to dry the glue storage tank 324. The high-temperature airflow passes through the glue storage tank 324 and a portion enters the first guide hole 314 for drying, which facilitates the subsequent bonding of the sealant.

[0065] Step 7: Refill the sealant into the glue storage tank 324 through the glue filling hole 325 to seal and bond the guide section 312 and the second sealing part 32. That is, re-seal the guide section 312 and the extension section 322 of the second sealing part 32. Fix the second sealing part 32 to the first protrusion 2 in a fixed position and fix it with fastening bolts.

[0066] Step 8: Cover the outside of the second protrusion 4 with the second connector 5 at the upper end, and apply sealant at the connection with the pipe gallery unit 1 and the first protrusion 2. That is, fasten the fastening part 51 onto the second protrusion 4, and the limiting part 52 is inserted into the limiting groove 41. The two sides are in contact with the two adjacent pipe gallery units 1, and the bottom of the openings of the fastening part 51 abuts against the first protrusion 2.

Claims

1. A prefabricated pipe gallery connection assembly, wherein the prefabricated pipe gallery comprises individual pipe gallery units (1) sequentially and adjacently buried in a foundation pit, characterized in that: Adjacent pipe rack units (1) are connected by a connecting component, which includes a first protrusion (2) vertically disposed on both sides of the pipe rack passage opening (11), and a first connector (3) is provided between the first protrusions (2) of adjacent pipe rack units (1) to connect two adjacent first protrusions (2). The first protrusion (2) has a second receiving groove (22) and a first receiving groove (21) vertically opened at the inner and outer sides away from the tube gallery unit (1), respectively. The first connector (3) includes a first sealing part (31) inserted into the first receiving groove (21) and a second sealing part (32) fastened in the second receiving groove (22). The second sealing part (32) is detachably installed with the first protrusion (2), and the first sealing part (31) and the second sealing part (32) extend to the first protrusion (2) of the adjacent tube gallery unit (1) and abut against each other. The first sealing part (31) includes a first sealing section (311) inserted into the first receiving groove (21) and a guide section (312) extending between two first protrusions (2). The guide section (312) has a plurality of inclined downward guide grooves (313) on both sides from top to bottom. The guide section (312) has a first guide hole (314) in the middle that communicates with the corresponding guide groove (313). The first guide hole (314) communicates with a second guide hole (315), and the second guide hole (315) is inclined downward to the outside of the first sealing section (311). The connecting assembly also includes a second protrusion (4) horizontally installed on the upper and lower sides of the edge of the pipe gallery passage (11), and the second protrusion (4) is arranged perpendicularly to the first protrusion (2). The second protrusions (4) of two adjacent pipe gallery units (1) abut against each other and are connected by a second connector (5). The second connector (5) is fastened to the outside of the two abutting second protrusions (4). The first protrusion (2) extends outward relative to the second protrusion (4) in the horizontal direction, and the distance between the two adjacent vertical and parallel planes is not less than the thickness of the portion of the second sealing part (32) extending out of the first protrusion (2).

2. The prefabricated pipe gallery connection assembly according to claim 1, characterized in that, The second sealing part (32) includes a second sealing section (321) that is fastened in the second receiving groove (22) and an extension section (322) that extends between the two first protrusions (2), and the extension section (322) abuts against the guide section (312); The second sealing section (321) has overlapping sections (323) at both ends, which can overlap on the first protrusion (2) on one side of the second receiving groove (22), and the second sealing section (321), overlapping section (323) and first protrusion (2) are fixed by fastener (6).

3. A prefabricated pipe gallery connection assembly according to claim 2, characterized in that, The first sealing section (311) has strip-shaped plug-in portions (316) on both sides, and the first protrusion (2) has a corresponding strip-shaped plug-in groove (23) for the strip-shaped plug-in portions (316) to be plugged in.

4. A prefabricated pipe gallery connection assembly according to claim 2, characterized in that, The length of the first protrusion (2) is consistent with the height of the pipe gallery passage opening (11) of the pipe gallery unit (1), the length of the second protrusion (4) is 4 / 5-5 / 6 of the length of the first protrusion (2), and the outer side of the pipe gallery unit (1) extends outward relative to the outer end face of the second protrusion (4) in the vertical direction.

5. A prefabricated pipe gallery connection assembly according to claim 4, characterized in that, The second connector (5) includes a fastening part (51) with a U-shaped opening. The two ends of the opening of the fastening part (51) abut against the first protrusion (2), and the inner side of the U-shaped opening abuts against the second protrusion (4).

6. A prefabricated pipe gallery connection assembly according to claim 5, characterized in that, The bottom of the fastening part (51) is provided with a strip-shaped limiting member (52) perpendicular to its longer side, and the outer side of the second protrusion (4) is provided with a limiting groove (41) that is adapted to the limiting member (52).

7. A prefabricated pipe gallery connection assembly according to claim 2, characterized in that, The utility tunnel unit (1) has several positioning rods (7) arranged from top to bottom at one end, and the positioning rods (7) are located inside the first protrusion (2). The other end of the utility tunnel unit (1) is provided with a positioning hole (8) for the insertion of the positioning rod (7) of another utility tunnel unit (1).

8. A prefabricated pipe gallery connection assembly according to any one of claims 2-7, characterized in that, The extension section (322) has several glue storage tanks (324) from top to bottom on the end face near the guide section (312). The extension section (322) has several glue filling holes (325) that communicate with the corresponding glue storage tanks (324). The glue filling holes (325) are opened through the second sealing section (321) on one side. The glue filling holes (325) can be used to add sealant into the glue storage tanks (324).

9. A prefabricated pipe gallery connection assembly according to claim 8, characterized in that, The guide section (312) is provided with a cleaning hole (317), and the cleaning hole (317) is connected to the first guide hole (314). When the second sealing part (32) is in a fixed state, the cleaning hole (317) is located in the glue storage tank (324), located below the glue filling hole (325) in the vertical direction, and the two are aligned in the horizontal direction.

10. A method for overhauling a prefabricated pipe gallery connection assembly, applied to a prefabricated pipe gallery connection assembly as described in claim 9, characterized in that, Includes the following steps: Step 1: Apply adhesive remover to the joint between the second connector (5), the tube gallery unit (1), and the first protrusion (2). After the sealant at the joint softens, disassemble the second connector (5). Step 2: Inject adhesive remover through the glue filling hole (325), wait for the sealant in the glue storage tank (324) to soften, and then remove it from the fixed position of the second sealing part (32) and the first protrusion (2). Step 3: Scrape off the residual sealant inside the glue storage tank (324) and on the end face of the guide section (312); Step 4: Cover the inside of the first protrusion (2) with the second sealing part (32), and lift the second sealing section (321) upward along the second receiving groove (22). The extension section (322) slides upward along the guide section (312) along with the second sealing section (321) until the glue hole (325) and the cleaning hole (317) are aligned. Step 5: The high-pressure water flow is introduced into the glue-filling hole (325), enters the first guide hole (314) along the cleaning hole (317), and finally flows out of the second guide hole (315) to complete the cleaning; Step six, slide the second sealing section (321) raised in step four down along the second receiving groove (22) until the upper and lower end faces of the second sealing section (321) are flush with the upper and lower end faces of the first protrusion (2) respectively, and pass a high temperature airflow through the glue filling hole (325) to dry the glue storage tank (324); Step 7: Refill the sealant into the glue storage tank (324) through the glue filling hole (325) to seal and bond the guide section (312) to the second sealing part (32), and fix the second sealing part (32) to the first protrusion (2) through the fastener (6); Step 8: Cover the outside of the second protrusion (4) with the second connector (5) at the upper end, and apply sealant at the connection with the tube gallery unit (1) and the first protrusion (2).

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