Sealing waterproof construction method and waterproof system for pipe gallery joint and pipe gallery system

Abstract

The invention relates to the technical field of sealing and water proofing, in particular to a sealing and water proofing construction method for a pipe gallery joint, a water proofing system and a pipe gallery system.The water proofing construction method comprises the steps that S1, a first sealing strip and a second sealing strip are constructed in the joint of two sections of pipe galleries along side plates and bottom plates of the pipe galleries, a gap is reserved between the first sealing strip and the second sealing strip to form a sealing cavity; a grouting pipe is pre-buried in the sealing cavity; s2, sealing slurry is injected into the grouting pipe, and the sealing slurry flows into the sealing cavity along the notch in the grouting pipe and fills the sealing cavity; and S3, the grouting pipe is cleaned. The sealing slurry filled in the sealing cavity is gradually solidified so as to play a sealing role, after the sealing performance of a subsequent sealing structure is weakened, secondary grouting can be carried out through the hollow grouting pipe, cracks, gaps and other defects occurring in the solidified sealing slurry injected for the first time are repaired, sealing can be carried out again after the newly injected sealing slurry is solidified, and the sealing effect is good. And the sealing performance of the sealing structure is improved and maintained again, so that the service life of the sealing structure is prolonged.

Description

Technical Field

[0001] This invention relates to the field of sealing and waterproofing technology, and in particular to a sealing and waterproofing construction method, waterproofing system, and pipe gallery system for pipe gallery joints. Background Technology

[0002] In the construction of some cross-sea bridges, utility tunnels are incorporated into the bridge structure for laying optical fibers, cables, and other equipment. These tunnels are typically designed as U-shaped troughs, with cables placed inside and the openings sealed with covers. The tunnels extend longitudinally along the bridge, with a total length roughly equivalent to the bridge's length. To accommodate longer laying distances, prefabrication and on-site assembly are commonly used in practice, connecting multiple tunnel sections sequentially to form a unified structure. However, some cross-sea bridges are constrained by engineering conditions, resulting in low clearances under the bridge. In areas with significant tidal ranges, the bridge structure may be submerged during high tide, allowing seawater to enter the beams and seep into the utility tunnels. To prevent seawater from seeping into the tunnels through the joints between sections and damaging optical fibers, cables, and other electrical equipment, these joints must be effectively sealed. While existing sealing techniques and structures can meet seepage prevention requirements in the short term, for bridges in long-term use, the continuous erosion from seawater and material aging mean that existing sealing methods, such as adhesive bonding, may fail due to weak connections between the sealing material and the pipe body. Furthermore, because they are embedded in the beam structure, secondary repairs to strengthen the seal are impossible. Therefore, there is an urgent need to improve and optimize existing sealing technologies to enhance their long-term sealing performance and durability. Summary of the Invention

[0003] The purpose of this invention is to overcome the technical problems of existing sealing methods and structures used in bridge pipe corridors having poor sealing effects and being unable to maintain long-term sealing performance through secondary repairs, and to provide a sealing and waterproofing construction method, waterproofing system and pipe corridor system for pipe corridor joints.

[0004] In a first aspect, the present invention provides a sealing and waterproofing construction method for pipe gallery joints, comprising: S1: A first sealing strip and a second sealing strip are installed along the side plate and bottom plate of the pipe gallery at the joint between the two sections of the pipe gallery. A gap is reserved between the first sealing strip and the second sealing strip to form a sealing cavity. A grouting pipe is pre-embedded in the sealing cavity. S2: Inject sealing grout into the grouting pipe, and the sealing grout flows in along the cut on the grouting pipe and fills the sealing cavity; S3: Clean the grouting pipe.

[0005] Addressing the technical challenge of existing sealing processes and structures being unable to repair failed seals and extend their sealing effect when embedded in beam structures, this invention first applies a first and second sealing strip to the joints of the pipe gallery, leaving a gap between them. Then, the two sealing strips, along with the side and bottom plates of the pipe gallery, form a sealing cavity, which serves as the initial structure of the sealing system. After pre-embedding the grouting pipe in the sealing cavity, sealing grout is injected into it. Once sufficient injection pressure is reached, the cut on the grouting pipe expands, allowing the sealing grout to flow from the pipe into the sealing cavity, gradually filling it. The sealing grout filling the cavity gradually solidifies, achieving a sealing effect. The sealing grout in the grouting pipe needs to be removed before it completely solidifies; that is, the grouting pipe needs to be cleaned to remove any residual sealing grout, preventing blockage after solidification. Subsequently, as the sealing structure is used... After being soaked in seawater and aging due to the material itself, the solidified sealant in the sealing cavity may develop defects such as cracks and voids, resulting in weakened sealing performance. In this case, a hollow grouting pipe can be used to perform secondary or re-grouting. The newly injected sealant can refill the sealing cavity and repair the cracks and voids that appeared in the first injected solidified sealant. After the newly injected sealant solidifies, it can be resealed, thereby improving and maintaining the sealing performance of the sealing structure, and thus achieving the purpose of extending the service life and sealing effect of the sealing structure.

[0006] Preferably, in S1, the method for applying the first sealing strip and the second sealing strip includes: C1: The first sealing strip and the second sealing strip are affixed to the end face of one of the two sections of the pipe gallery; C2: Connect the two sections of the pipe gallery and embed the first sealing strip and the second sealing strip in the joint of the two sections of the pipe gallery; the sealing cavity is formed between the first sealing strip, the second sealing strip and the two sections of the pipe gallery.

[0007] To facilitate the construction of the first and second sealing strips, they can be affixed to the end face of one of the pipe racks before the two pipe rack sections are joined, leaving a gap to form a sealing cavity. Then, the two pipe rack sections are joined, that is, the end face of the other pipe rack section is affixed to the other side of the first and second sealing strips. In this way, the sealing cavity can be formed between the first and second sealing strips and the two pipe rack sections. In other words, the sealing cavity is formed by the first and second sealing strips and the two pipe rack sections.

[0008] Preferably, in S1, the method for pre-embedding the grouting pipe includes: before connecting the two sections of the pipe gallery, setting the grouting pipe in the gap between the first sealing strip and the second sealing strip, wherein the direction of the grouting pipe is consistent with the direction of the first sealing strip and the second sealing strip.

[0009] To facilitate the pre-embedding of grouting pipes, the grouting pipes can be pre-embedded before the two pipe rack sections are joined. Specifically, after affixing the first and second sealing strips to the end face of one pipe rack section, the grouting pipe can be pre-embedded in the gap between the first and second sealing strips. The grouting pipe can be laid along the direction of the gap. Temporary connection measures can be used to fix the grouting pipe to the end face of the pipe rack, such as by bonding with adhesive strips or tape. Of course, if it can be ensured that the grouting pipe will not fall out of the gap, temporary connection measures can be omitted. After the grouting pipe is pre-embedded, the two pipe rack sections are then joined and bonded.

[0010] Preferably, in C2, after the two sections of the pipe gallery are joined, a first sealant is applied to the outside of the first sealing strip and the second sealing strip.

[0011] To enhance the overall sealing performance of the sealing structure, a first sealant can be applied to the outer side of the first and second sealing strips. Specifically, the first and second sealing strips are positioned in the joint and a certain distance from the edge of the joint, forming a space on the outer side of the first and second sealing strips. The first sealant can be filled into this space to seal the joint. The first sealant can be a commonly used waterproof coating or cement-based material in the engineering field, which is a paste-like material with a certain viscosity before solidification, so that it can be applied during construction and solidify in time to form an effective seal.

[0012] Preferably, in S1, before the grouting pipe is pre-embedded, several brackets are pre-embedded in the joint between the bottom plates of the two sections of the pipe gallery, and the brackets are connected between the bottom plates of the two sections of the pipe gallery; when pre-embedding the grouting pipe, the grouting pipe passing through the bottom plate of the pipe gallery is placed on the bracket.

[0013] The bracket structure includes an arc-shaped section in the middle and connecting wing plates on both sides of the arc-shaped section. The bracket can be set before the grouting pipe is pre-embedded. Specifically, after setting the first and second sealing strips on the end face of a section of the pipe gallery, the bracket can be installed on the end face of the bottom plate of the pipe gallery. The connecting wing plate on one side of the bracket is installed by screws, adhesives, etc. The distance between the bracket and the first and second sealing strips needs to be determined in advance. The specific installation position of the bracket is determined according to the determined distance. After multiple brackets are installed, the grouting pipe is pre-embedded. The grouting pipe passing through the bottom plate of the pipe gallery can be laid on the bracket, which can prevent the grouting pipe on the bottom plate from sagging and affecting the subsequent grouting effect. When two sections of the pipe gallery are connected, the connecting wing plate on the other side of the bracket is then glued to the bottom plate of the other section of the pipe gallery.

[0014] Preferably, in S2, the sealing grout is injected into the grouting pipe at a first preset pressure, the first preset pressure being higher than the opening pressure of the cut; in S3, the cleaning method of the grouting pipe includes: introducing a cleaning medium into the grouting pipe at a second preset pressure, the second preset pressure being lower than the opening pressure of the cut.

[0015] The grouting pressure needs to be higher than the critical pressure for opening the cut to allow the cut to expand and the grout to be injected into the sealing cavity. After grouting is completed and the pressure is released, the cut can automatically close under the rebound of the grouting pipe material. During the cleaning process, the pressure of the cleaning medium introduced into the grouting pipe needs to be lower than the critical pressure for opening the cut to prevent the cleaning medium from entering the sealing cavity along the cut. For example, if the critical pressure for opening the cut is 1 MPa, then the first preset pressure of the grout needs to be higher than 1 MPa, such as 1.2 MPa, while the second preset pressure of the cleaning medium needs to be lower than 1 MPa, such as 0.5 MPa. During grouting, the sealing grout can enter the grouting pipe through the opening at one end. At the beginning of grouting, the grouting can be carried out with a low pressure. At this time, the cut cannot be expanded. When it is observed that grout is gushing out from the opening at the other end of the grouting pipe, the opening at the other end of the grouting pipe can be temporarily blocked to prevent the grout from continuing to gushing out. Then, the grouting pressure is increased to the first preset pressure. At this time, the cut can be expanded and the grout begins to fill the sealing cavity. As the filling process proceeds, when it is observed that grout is gushing out from the openings at both ends of the sealing cavity, it indicates that the grout has filled the sealing cavity, and the grouting can be stopped.

[0016] Preferably, it further includes: S4: sealing the openings at both ends of the sealing cavity and the openings at both ends of the grouting pipe with the second sealant.

[0017] After grouting and cleaning are completed, a second sealant can be used to seal the openings at both ends of the sealing cavity and the grouting pipe. This serves as the final finishing treatment in the construction of the sealing structure, sealing the grout within the sealing cavity. The second sealant can be applied to the upper edge of the side plate of the pipe gallery shown in the diagram. The second sealant can be the same material as the first sealant, or other suitable materials can be selected. During secondary grouting, the second sealant can be removed by grinding or cutting to expose the openings at both ends of the sealing cavity and the grouting pipe, followed by secondary grouting. After the secondary grouting, the second sealant is reapplied for sealing.

[0018] Preferably, when cracks or gaps appear at the joints of the pipe gallery, the process further includes step S5 of secondary grouting or re-grouting, namely: S5: Remove the second sealant, open both ends of the grouting pipe to form openings, repeat steps S2 and S3 to perform secondary grouting or re-grouting, and then implement step S4 to complete the secondary grouting or re-grouting.

[0019] After the tide recedes, maintenance personnel can enter the pipe gallery to check for leaks. If leaks are found, it indicates that there are defects such as cracks and gaps in the sealing structure. In this case, secondary grouting is required using a hollow grouting pipe. The method of secondary grouting is basically the same as that of the first grouting. First, the sealing grout is injected into one end of the grouting pipe at a pressure lower than the first preset pressure. When grout comes out of the other end of the grouting pipe, the other end of the grouting pipe is temporarily sealed. Then, the grouting pressure is increased to the first preset pressure to expand the cut and allow the grout to flow into the cracks and gaps in the sealing cavity. The pressure needs to be maintained at the first preset pressure for a period of time to ensure that the cracks and gaps in the sealing cavity are fully filled. Then, the pressure is released and a cleaning medium is introduced into the grouting pipe at the second preset pressure to clean the grouting pipe. However, it is necessary to control the pressure holding time to not exceed the solidification time of the sealing grout. That is, the grouting pipe needs to be cleaned before the sealing grout solidifies.

[0020] In a second aspect, the present invention provides a waterproofing system for pipe gallery joints, constructed using the sealing and waterproofing construction method for pipe gallery joints as described above. The waterproofing system includes a first sealing strip and a second sealing strip filled in the joint between two adjacent pipe gallery sections. Both the first and second sealing strips extend along the length of the joint. A sealing cavity is formed between the first and second sealing strips. A grouting pipe is disposed in the sealing cavity and spaced apart from the first and / or second sealing strips. The grouting pipe has several slits that allow communication between the grouting pipe and the sealing cavity. Sealing grout fills the sealing cavity. A first sealant is coated on the outer sides of the first and second sealing strips. A second sealant is used to seal the openings at both ends of the sealing cavity and the openings at both ends of the grouting pipe.

[0021] Preferably, a plurality of the cuts are arranged in a quincunx pattern on the grouting pipe, and the first sealant is flush with the edge of the joint.

[0022] In a third aspect, the present invention provides a pipe gallery system comprising several pipe gallery sections and a waterproofing system for pipe gallery joints as described above, wherein the waterproofing system is disposed in the joint between any two adjacent pipe gallery sections.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention provides a sealing and waterproofing construction method, waterproofing system, and pipe gallery system for pipe gallery joints. The method involves applying a first sealing strip and a second sealing strip to the joint of the pipe gallery and leaving a gap between them. The two sealing strips, along with the side plates and bottom plate structure of the pipe gallery, form a sealing cavity, which serves as the initial structure of the sealing system of this invention. After the grouting pipe is pre-embedded in the sealing cavity, sealing grout can be injected into the grouting pipe. Once the sealing grout reaches sufficient injection pressure, the cut on the grouting pipe can be expanded, allowing the sealing grout to flow into the sealing cavity and gradually fill it. The sealing grout filling the sealing cavity will gradually solidify, thus achieving a sealing effect. The sealing grout in the grouting pipe needs to be removed before it solidifies, that is, the grouting pipe needs to be cleaned to remove any residual sealing grout, preventing the sealing grout from solidifying and clogging the grouting pipe. Subsequently, with the use of the sealing structure, after being soaked in seawater and due to the aging of the materials themselves, the solidified sealing grout in the sealing cavity may develop defects such as cracks and voids, resulting in weakened sealing performance. At this time, a second grouting can be performed using a hollow grouting pipe. The newly injected sealing grout can refill the sealing cavity, repairing the cracks and voids that appeared in the first injected solidified sealing grout. After the newly injected sealing grout solidifies, a new seal can be achieved, restoring and maintaining the sealing performance of the sealing structure, thereby extending the service life and sealing effect of the sealing structure. Attached Figure Description

[0024] Figure 1 This is a front view schematic diagram of the pipe gallery system of the present invention.

[0025] Figure 2 for Figure 1 A top-down view.

[0026] Figure 3 for Figure 1 A schematic diagram of the cross-section at "AA".

[0027] Figure 4 for Figure 3 A magnified view of a portion of point D.

[0028] Figure 5 for Figure 3 A magnified view of a portion of point E in the middle.

[0029] Figure 6 for Figure 5 A cross-sectional diagram at the "BB" mark.

[0030] Figure 7 for Figure 5 A cross-sectional diagram at the "CC" mark.

[0031] Figure 8 This is a schematic diagram of the grouting pipe structure.

[0032] Figure 9 This is a schematic diagram showing the layout of the cuts after the grouting pipe wall is unfolded into a plane.

[0033] Marked in the image: 1. Pipe gallery; 11. Side plate; 12. Bottom plate; 13. Side plate seam; 14. Bottom plate seam; 2. Waterproofing system; 3. First sealing strip; 4. Second sealing strip; 5. Sealing cavity; 6. Grouting pipe; 61. Cut; 7. First sealant; 8. Second sealant; 9. Bracket; 91. Arc-shaped part; 92. Connecting wing plate. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to specific embodiments. However, this 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.

[0035] 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 the present invention is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the present invention 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 particular 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 the present invention.

[0036] 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 that it 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.

[0037] 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.

[0038] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as 2, 3, 4, 5, 6, 7, 8, or 9, and can even exceed nine.

[0039] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided 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.

[0040] Example 1 This embodiment provides a sealing and waterproofing construction method for pipe gallery joints.

[0041] like Figures 1 to 9 As shown in the figure, the sealing and waterproofing construction method for pipe gallery joints in this embodiment includes the following steps: S1: A first sealing strip 3 and a second sealing strip 4 are installed along the side plate 11 and bottom plate 12 of the pipe gallery 1 in the joint between the two sections of the pipe gallery 1. A gap is reserved between the first sealing strip 3 and the second sealing strip 4 to form a sealing cavity 5. A grouting pipe 6 is pre-embedded in the sealing cavity 5. S2: Inject sealing grout into the grouting pipe 6. The sealing grout flows into the sealing cavity 5 along the cut 61 on the grouting pipe 6. S3: Clean the grouting pipe 6.

[0042] To address the technical challenge of existing sealing processes and structures being unable to repair failed seals and extend their sealing effect due to their embedding within the beam structure, this invention first applies a first sealing strip 3 and a second sealing strip 4 to the joint of the pipe gallery 1, leaving a gap between them. Then, the two sealing strips, along with the side plate 11 and bottom plate 12 of the pipe gallery 1, form a sealing cavity 5, which serves as the initial structure of the sealing system of this invention. After the grouting pipe 6 is pre-embedded in the sealing cavity 5, sealing grout can be injected into the grouting pipe 6. Once the sealing grout reaches sufficient injection pressure, the cut 61 on the grouting pipe 6 can be expanded, allowing the sealing grout to flow into the sealing cavity 5 and gradually fill it. The sealing grout filling the sealing cavity 5 will gradually solidify, thus achieving a sealing effect. The sealing grout in the grouting pipe 6 needs to be removed before it solidifies; that is, the grouting pipe 6 needs to be cleaned to remove any residual sealing grout, preventing it from solidifying and clogging the grouting pipe 6. Subsequently, with the use of the sealing structure, after immersion in seawater and the aging of the materials themselves, the solidified sealing grout in the sealing cavity 5 will... The grout may develop defects such as cracks and voids, which can weaken the sealing performance and lead to leakage in the pipe gallery 1. After the tide recedes, maintenance personnel can enter the pipe gallery 1 to check for leakage. If leakage occurs, it indicates that there are defects such as cracks and voids in the sealing structure. In this case, secondary grouting is required using the hollow grouting pipe 6. The newly injected grout can refill the sealing cavity 5 and repair the cracks and voids that appeared in the first injected solidified grout. After the newly injected grout solidifies, the seal can be restored, thereby improving and maintaining the sealing performance of the sealing structure and extending the service life and sealing effect of the sealing structure.

[0043] The joints of the pipe gallery 1 include side plate joints 13 and bottom plate joints 14. The first sealing strip 3 and the second sealing strip 4 can both be installed starting from the side plate joint 13 on one side, passing through the bottom plate joint 14 to the side plate joint 13 on the other side.

[0044] In this embodiment, the method for implementing the first sealing strip 3 and the second sealing strip 4 in step S1 above includes: C1: A first sealing strip 3 and a second sealing strip 4 are affixed to the end face of one of the two pipe rack sections 1; C2: Connect the two sections of pipe gallery 1 and embed the first sealing strip 3 and the second sealing strip 4 in the joint of the two sections of pipe gallery 1; the sealing cavity 5 is formed between the first sealing strip 3, the second sealing strip 4 and the two sections of pipe gallery 1.

[0045] To facilitate the construction of the first sealing strip 3 and the second sealing strip 4, the first sealing strip 3 and the second sealing strip 4 can be attached to the end face of one of the pipe racks 1 before the two pipe racks 1 are joined together, leaving a gap to form the sealing cavity 5. Then the two pipe racks 1 are joined together, that is, the end face of the other pipe rack 1 is attached to the other side of the first sealing strip 3 and the second sealing strip 4. In this way, the sealing cavity 5 can be formed between the first sealing strip 3, the second sealing strip 4 and the two pipe racks 1. In other words, the sealing cavity 5 is formed by the first sealing strip 3, the second sealing strip 4 and the two pipe racks 1.

[0046] In this embodiment, the pre-embedding method of the grouting pipe 6 in step S1 above includes: before connecting the two sections of pipe gallery 1, setting the grouting pipe 6 in the gap between the first sealing strip 3 and the second sealing strip 4, and the direction of the grouting pipe 6 is consistent with the direction of the first sealing strip 3 and the second sealing strip 4.

[0047] To facilitate the pre-embedding of the grouting pipe 6, it can be pre-embedded before the two sections of pipe gallery 1 are joined. Specifically, after attaching the first sealing strip 3 and the second sealing strip 4 to the end face of one section of pipe gallery 1, the grouting pipe 6 can be pre-embedded in the gap between the first sealing strip 3 and the second sealing strip 4. The grouting pipe 6 can be laid along the direction of the gap. Temporary connection measures can be used to fix the grouting pipe 6 to the end face of pipe gallery 1, such as by using adhesive strips or tape. However, care should be taken to avoid blocking the cut 61 on the grouting pipe 6 with adhesive strips or tape, and the cut 61 should not face the end face of pipe gallery 1 as much as possible to avoid affecting the subsequent grouting effect. Of course, if it can be ensured that the grouting pipe 6 will not fall out of the gap, temporary connection measures can be omitted; after the grouting pipe 6 is pre-embedded, the two sections of pipe gallery 1 are then joined and bonded.

[0048] Alternatively, in step C2 above, after the two sections of the pipe gallery 1 are joined together, the first sealant 7 is applied to the outside of the first sealing strip 3 and the second sealing strip 4.

[0049] To enhance the overall sealing performance of the sealing structure, a first sealant 7 can be applied to the outer side of the first sealing strip 3 and the second sealing strip 4. Specifically, the first sealing strip 3 and the second sealing strip 4 are set in the joint and are a certain distance away from the edge of the joint. A space can be formed on the outer side of the first sealing strip 3 and the second sealing strip 4. The first sealant 7 can be filled into the outer space of the first sealing strip 3 and the second sealing strip 4 to seal it. The first sealant 7 can be a commonly used waterproof coating or cement-based material in the engineering field, which is a paste-like material with a certain viscosity before solidification, so as to facilitate application during construction and solidify in time to form an effective seal.

[0050] Alternatively, in step S1 above, before the grouting pipe 6 is pre-embedded, multiple brackets 9 are pre-embedded in the joint of the bottom plate 12 of the two pipe gallery sections 1, and the brackets 9 are connected between the bottom plates 12 of the two pipe gallery sections 1; when pre-embedding the grouting pipe 6, the grouting pipe 6 passing through the bottom plate 12 of the pipe gallery 1 is placed on the brackets 9.

[0051] The bracket 9 has a structure including an arc-shaped part 91 in the middle and connecting wing plates 92 on both sides of the arc-shaped part 91. The bracket 9 can be set before the grouting pipe 6 is pre-embedded. Specifically, after setting the first sealing strip 3 and the second sealing strip 4 on the end face of a section of pipe gallery 1, the bracket 9 can be installed on the end face of the bottom plate 12 of the pipe gallery 1. The connecting wing plate 92 on one side of the bracket 9 is installed by screws, adhesives, etc. The distance between the bracket 9 and the first sealing strip 3 and the second sealing strip 4 needs to be determined in advance. The specific installation position of the bracket 9 is determined according to the determined distance. After multiple brackets 9 are installed, the grouting pipe 6 is pre-embedded. The grouting pipe 6 passing through the bottom plate 12 of the pipe gallery 1 can be laid on the bracket 9. This can prevent the grouting pipe 6 on the bottom plate 12 from sagging and affecting the subsequent grouting effect. When two sections of pipe gallery 1 are connected, the connecting wing plate 92 on the other side of the bracket 9 is then glued to the bottom plate 12 of the other section of pipe gallery 1. Of course, other fixing methods can also be used to fix the grouting pipe 6 at the base plate 12, instead of the above-mentioned method of fixing with bracket 9. For example, temporary connection measures can be used to fix the grouting pipe 6 to the end face of the base plate 12, such as by adhesive strips or tapes. However, care should be taken to avoid blocking the cut 61 on the grouting pipe 6 with adhesive strips or tapes, and the cut 61 should also be kept away from the end face of the base plate 12 as much as possible to avoid affecting the subsequent grouting effect.

[0052] In this embodiment, in step S2, the sealing grout is injected into the grouting pipe 6 at a first preset pressure, which is higher than the opening pressure of the cut 61; in step S3, the cleaning method of the grouting pipe 6 includes: introducing a cleaning medium into the grouting pipe 6 at a second preset pressure, which is lower than the opening pressure of the cut 61.

[0053] The grouting pressure needs to be higher than the critical pressure for opening the cut 61 so that the cut 61 can be expanded to allow the grout to be injected into the sealing cavity 5. After grouting is completed and the pressure is released, the cut 61 can automatically close under the rebound action of the grouting pipe 6 material. During the cleaning process, the pressure of the cleaning medium introduced into the grouting pipe 6 needs to be lower than the critical pressure for opening the cut 61 so as to prevent the cleaning medium from entering the sealing cavity 5 along the cut 61. For example, if the critical pressure for opening the cut 61 is 1 MPa, then the first preset pressure of the grout needs to be higher than 1 MPa, such as 1.2 MPa, while the second preset pressure of the cleaning medium needs to be lower than 1 MPa, such as 0.5 MPa. When cleaning the grouting pipe 6, a pressure pump or other equipment can be connected to one end of the grouting pipe 6. Air, water, or thinner can be introduced as cleaning media to discharge the grout remaining in the grouting pipe 6 from the other end. When it is observed that all the grout discharged from the other end of the grouting pipe 6 is cleaning media and there is no residual sealing grout, it indicates that the grouting pipe 6 is clean. During grouting, the sealing grout can enter the grouting pipe 6 through the opening at one end. At the beginning of grouting, the grouting can be carried out with a lower pressure. At this time, the cut 61 cannot be expanded. When it is observed that grout is gushing out from the opening at the other end of the grouting pipe 6, the opening at the other end of the grouting pipe 6 can be temporarily sealed to prevent the grout from continuing to gushing out. Then, the grouting pressure is increased to the first preset pressure. At this time, the cut 61 can be expanded, and the grout begins to fill the sealing cavity 5. As the filling process proceeds, when it is observed that grout is gushing out from the openings at both ends of the sealing cavity 5, it indicates that the grout has filled the sealing cavity 5, and the grouting can be stopped.

[0054] Here, the sealant can be a single-component sealant such as polyacrylic acid resin, or a two-component sealant such as A and B components of an acrylic grouting material that can undergo cross-linking and solidify sequentially. If a single-component sealant such as polyacrylic acid resin is chosen, a cleaning medium needs to be introduced into the grouting pipe 6 before the sealant solidifies to remove any residual sealant in the grouting pipe 6. Specifically, a pressure pump or similar device can be connected to one end of the grouting pipe 6, and a cleaning medium can be introduced to discharge any residual sealant from the other end of the grouting pipe 6. If a two-component sealant such as A and B components of an acrylic grouting material is chosen, the two-component sealant can be injected first... One of the liquids is injected into the grouting pipe 6. For example, liquid A is injected first and then into the sealing cavity 5. After the injection of liquid A is completed, a cleaning medium (such as air) is introduced into the grouting pipe 6 to remove the residual liquid A in the grouting pipe 6. After removing the liquid A in the grouting pipe 6, liquid B is injected into the grouting pipe 6. After liquid B enters the sealing cavity 5 through the cut 61, it can mix with the previously injected liquid A. After the two liquids are mixed, a cross-linking reaction can occur and solidify, which can seal the sealing cavity 5. After the injection of liquid B is completed, a cleaning medium (such as air) also needs to be introduced into the grouting pipe 6 to remove the residual liquid B in the grouting pipe 6.

[0055] When using dual-solid materials such as liquids A and B for grouting, in order to maximize the mixing uniformity of the two liquids in the sealing cavity 5, improve the cross-linking reaction effect, and thus ensure the sealing effect of the solidified material generated after the reaction, the principle of "small amount and multiple cycles" can be adopted for grouting. Specifically, a small amount of liquid A can be injected into the sealing cavity 5 first, followed by a small amount of liquid B. After waiting for sufficient time for the two to react fully, a small amount of liquid A and a small amount of liquid B can be injected in sequence until the solidified material generated by the final reaction completely fills the sealing cavity 5 (i.e., after observing the sealing material emerging from the opening of the sealing cavity). It should be noted that after each grouting, the cleaning step of the grouting pipe 6 needs to be repeated to avoid the two liquids mixing and reacting in the grouting pipe 6.

[0056] The cleaning medium can be air, water, or organic solvents such as thinner. For organic materials such as polyacrylic acid resin, organic solvents are more conducive to the dissolution and cleaning of organic materials. If water is used as the cleaning medium, after the residual sealing grout in the grouting pipe 6 is discharged, it is best to also introduce air to discharge the water in the grouting pipe 6. For example, when using a two-component grout for grouting, after the A-component grouting is completed, if water is introduced into the grouting pipe 6 to discharge the A-component, when introducing the B-component, the water in the grouting pipe 6 should first be discharged using a pressure lower than the critical pressure for opening the cut 61, and then pressurized to a pressure higher than the critical pressure for opening the cut 61 to expand the cut 61 and allow the B-component to enter the sealing cavity 5.

[0057] In this embodiment, the waterproofing construction of the joint of the pipe gallery 1 further includes: S4: sealing the openings at both ends of the sealing cavity 5 and the openings at both ends of the grouting pipe 6 with the second sealant 8.

[0058] After grouting and cleaning, the second sealant 8 can be used to seal the openings at both ends of the sealing cavity 5 and the grouting pipe 6. This can be used as the final finishing treatment in the construction of the sealing structure, sealing the grout in the sealing cavity 5. The second sealant 8 can be applied to the upper edge of the side plate 11 of the pipe gallery 1 in the figure. The second sealant 8 can be the same material as the first sealant 7, or other suitable materials can be selected. During secondary grouting, the second sealant 8 can be removed by grinding or cutting to expose the openings at both ends of the sealing cavity 5 and the grouting pipe 6, and then secondary grouting can be performed. After secondary grouting, the grouting pipe 6 is cleaned again, and the second sealant 8 is reapplied for sealing. It should be noted that the sealing structure of the present invention can be repeatedly grouted multiple times when repair is needed after the first grouting. The secondary grouting mentioned above can be understood as each grouting in the multiple groutings during the repair after the first grouting.

[0059] In this embodiment, when cracks or gaps appear at the joints of the pipe gallery 1, a step S5 of secondary grouting or re-grouting is further included, namely: S5: Remove the second sealing material 8, open both ends of the grouting pipe 6 to form openings, repeat steps S2 and S3 to perform secondary grouting or re-grouting, and then implement step S4 to complete the secondary grouting or re-grouting.

[0060] After the tide recedes, maintenance personnel can enter the pipe gallery 1 to check for leaks. If leaks are found, it indicates that defects such as cracks or gaps in the sealing structure have caused the seal to fail. Further, maintenance personnel can use non-destructive testing equipment to locate the gaps and holes in the sealing structure, thus determining the location of the pipe gallery where the sealing structure that needs repair is located. Next, secondary grouting is performed using the hollow grouting pipe 6. The method for secondary grouting is basically the same as the initial grouting: first, sealing grout is injected into the pipe 6 through an opening at a pressure lower than the first preset pressure. When grout oozes from the opening at the other end of the grouting pipe 6, temporarily seal the opening at the other end of the grouting pipe 6, then increase the grouting pressure to the first preset pressure, expand the cut 61, and allow the grout to flow into the cracks and gaps in the sealing cavity 5. It is necessary to maintain the pressure at the first preset pressure for a period of time to ensure that the cracks and gaps in the sealing cavity 5 are fully filled. Then, depressurize and introduce cleaning medium into the grouting pipe 6 at the second preset pressure to clean the grouting pipe 6. However, it is necessary to control the pressure holding time to not exceed the solidification time of the sealing grout, that is, the grouting pipe 6 needs to be cleaned before the sealing grout solidifies.

[0061] For secondary or re-grouting, the grouting material used in the initial grouting, namely polyacrylic acid resin, can be selected. This can be used as a repair grouting material, possessing the functions of sealing leaks and filling dense micro-cracks (regardless of whether the initial grouting uses the same polyacrylic acid resin as the secondary grouting, the polyacrylic acid resin can fill and seal defects in the original material during secondary grouting), and can be used to restore the overall waterproof integrity of the joint. However, the use of a dual-grouting material scheme (A and B liquids) is generally not recommended for secondary or re-grouting because it is difficult to control the mixing degree of the two liquids in micro-cracks or pores during secondary grouting to ensure repair quality.

[0062] Example 2 This embodiment provides a waterproofing system for pipe gallery joints.

[0063] The waterproofing system for pipe gallery joints in this embodiment is constructed using the sealing and waterproofing construction method for pipe gallery joints described in Embodiment 1.

[0064] The waterproofing system 2 includes a first sealing strip 3 and a second sealing strip 4 filling the joint between two adjacent pipe rack sections 1. Both the first sealing strip 3 and the second sealing strip 4 extend along the length of the joint. A sealing cavity 5 is formed between the first sealing strip 3 and the second sealing strip 4. A grouting pipe 6 is disposed in the sealing cavity 5 and spaced apart from the first sealing strip 3 and / or the second sealing strip 4. The grouting pipe 6 has multiple cuts 61, which allow the grouting pipe 6 to communicate with the sealing cavity 5. Sealing grout fills the sealing cavity 5. The outer sides of the first sealing strip 3 and the second sealing strip 4 are coated with a first sealant 7. The openings at both ends of the sealing cavity 5 and the openings at both ends of the grouting pipe 6 are sealed with a second sealant 8.

[0065] In this embodiment, multiple cuts 61 are arranged in a quincunx pattern on the grouting pipe 6, and the first sealant 7 is flush with the edge of the joint. Figure 9 The diagram shows a quincunx pattern formed by multiple cuts 61 on the wall of the grouting pipe 6. This quincunx pattern allows for multiple injection directions of the sealing grout along the length and circumference of the grouting pipe 6, ensuring more uniform injection of the sealing grout into the sealing cavity 5. The multiple cuts 61 also improve grouting efficiency. Of course, other arrangements of the cuts 61 on the grouting pipe 6 are also possible; for example, the cuts 61 can be spaced out along the length of the grouting pipe 6, i.e., arranged in a straight line.

[0066] Example 3 This embodiment provides a utility tunnel system.

[0067] The pipe gallery system of this embodiment includes multiple pipe gallery sections 1 and a waterproofing system for pipe gallery joints as in Embodiment 2. The waterproofing system 2 is installed in the joint between any two adjacent pipe gallery sections 1.

[0068] In summary, the present invention provides a sealing and waterproofing construction method, a waterproofing system, and a pipe gallery system for pipe gallery joints. By applying a first sealing strip and a second sealing strip in the joint of the pipe gallery and leaving a gap between them, and then using the two sealing strips and the side plate and bottom plate structure of the pipe gallery to form a sealing cavity, this serves as the initial structure of the sealing system of the present invention. After the grouting pipe is pre-embedded in the sealing cavity, sealing grout can be injected into the grouting pipe. Once the sealing grout reaches sufficient injection pressure, the cut on the grouting pipe can be expanded, allowing the sealing grout to flow into the sealing cavity and gradually fill it. The sealing grout filling the sealing cavity will gradually solidify, thus achieving a sealing effect. The sealing grout in the grouting pipe needs to be removed before it solidifies, that is, the grouting pipe needs to be cleaned to remove any residual sealing grout, preventing the sealing grout from solidifying and clogging the grouting pipe. Subsequently, with the use of the sealing structure, after being soaked in seawater and due to the aging of the materials themselves, the solidified sealing grout in the sealing cavity may develop defects such as cracks and voids, resulting in weakened sealing performance. At this time, a second grouting can be performed using a hollow grouting pipe. The newly injected sealing grout can refill the sealing cavity, repairing the cracks and voids that appeared in the first injected solidified sealing grout. After the newly injected sealing grout solidifies, a new seal can be achieved, restoring and maintaining the sealing performance of the sealing structure, thereby extending the service life and sealing effect of the sealing structure.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sealing and waterproofing construction method for pipe gallery joints, characterized in that, include: S1: A first sealing strip (3) and a second sealing strip (4) are applied along the side plate (11) and bottom plate (12) of the pipe gallery (1) in the joint of the two pipe gallery sections (1). A gap is reserved between the first sealing strip (3) and the second sealing strip (4) to form a sealing cavity (5). A grouting pipe (6) with several cuts (61) is embedded in the sealing cavity (5). S2: Inject sealing grout into the grouting pipe (6), and the sealing grout flows out along the cut (61) on the grouting pipe (6) and fills the sealing cavity (5). S3: Clean the grouting pipe (6) to complete the waterproofing construction of the pipe gallery joint.

2. The sealing and waterproofing construction method for pipe gallery joints according to claim 1, characterized in that, In S1, the methods for applying the first sealing strip (3) and the second sealing strip (4) include: C1: The first sealing strip (3) and the second sealing strip (4) are attached to the end face of one of the two sections of the pipe gallery (1); C2: Connect the two sections of the pipe gallery (1) and embed the first sealing strip (3) and the second sealing strip (4) in the joint of the two sections of the pipe gallery (1); the sealing cavity (5) is formed between the first sealing strip (3), the second sealing strip (4) and the two sections of the pipe gallery (1).

3. The sealing and waterproofing construction method for pipe gallery joints according to claim 2, characterized in that, In S1, the method for pre-embedding the grouting pipe (6) includes: before connecting the two sections of the pipe gallery (1), the grouting pipe (6) is set in the gap between the first sealing strip (3) and the second sealing strip (4), and the direction of the grouting pipe (6) is consistent with the direction of the first sealing strip (3) and the second sealing strip (4).

4. The sealing and waterproofing construction method for pipe gallery joints according to claim 2, characterized in that, In C2, after the two sections of the pipe gallery (1) are joined together, a first sealant (7) is applied to the outside of the first sealing strip (3) and the second sealing strip (4).

5. The sealing and waterproofing construction method for pipe gallery joints according to claim 1, characterized in that, In S1, before the grouting pipe (6) is pre-embedded, several brackets (9) are pre-embedded in the joint of the bottom plate (12) of the two sections of the pipe gallery (1). The brackets (9) are connected between the bottom plates (12) of the two sections of the pipe gallery (1). When pre-embedding the grouting pipe (6), the grouting pipe (6) passing through the bottom plate (12) of the pipe gallery (1) is placed on the brackets (9).

6. The sealing and waterproofing construction method for pipe gallery joints according to claim 1, characterized in that, In S2, the sealing grout is injected into the grouting pipe (6) at a first preset pressure, and the first preset pressure is higher than the opening pressure of the cut (61); In S3, the cleaning method of the grouting pipe (6) includes: introducing a cleaning medium into the grouting pipe (6) at a second preset pressure, wherein the second preset pressure is lower than the opening pressure of the cut (61).

7. The sealing and waterproofing construction method for pipe gallery joints according to any one of claims 1 to 6, characterized in that, Also includes: S4: Seal the openings at both ends of the sealing cavity (5) and the openings at both ends of the grouting pipe (6) with the second sealant (8).

8. The sealing and waterproofing construction method for pipe gallery joints according to claim 7, characterized in that, When cracks or gaps appear at the joints of the pipe gallery, step S5, which includes secondary grouting or re-grouting, is also included: S5: Remove the second sealant (8), open both ends of the grouting pipe (6) to form openings, repeat steps S2 and S3 to perform secondary grouting or re-grouting, and then implement step S4 to complete the secondary grouting or re-grouting.

9. A waterproofing system for pipe gallery joints, characterized in that, The waterproofing system (2) is constructed using any one of claims 1 to 8 for sealing and waterproofing pipe gallery joints. The waterproofing system (2) includes a first sealing strip (3) and a second sealing strip (4) filling the joint between two adjacent pipe gallery sections (1). The first sealing strip (3) and the second sealing strip (4) both extend along the length of the joint. The sealing cavity (5) is formed between the first sealing strip (3) and the second sealing strip (4). The grouting pipe (6) is disposed in the sealing cavity (5) and spaced apart from the first sealing strip (3) and / or the second sealing strip (4). The grouting pipe (6) has several cuts (61) that allow the grouting pipe (6) to communicate with the sealing cavity (5). The sealing slurry fills the sealing cavity (5). The outer sides of the first sealing strip (3) and the second sealing strip (4) are coated with a first sealant (7). The openings at both ends of the sealing cavity (5) and the openings at both ends of the grouting pipe (6) are sealed with a second sealant (8).

10. A utility tunnel system, characterized in that, It includes several sections of pipe gallery (1) and a waterproofing system for the joint of the pipe gallery as described in claim 9, wherein the waterproofing system (2) is installed in the joint between any two adjacent sections of the pipe gallery (1).

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