A tunnel lining construction joint waterproof structure

Abstract

This application discloses a waterproof structure for tunnel lining construction joints, including a tunnel wall and pre-embedded bolts. A construction joint is provided inside the tunnel wall, and a groove and an installation slot are formed on the upper part of the tunnel wall. A water diversion channel is provided inside the installation slot, and connecting plates are fixedly installed on both sides of the water diversion channel. A support frame is fixedly installed inside the water diversion channel. When seepage water collects in the crushed stone layer, the crushed stone layer can, on the one hand, preliminarily filter concrete residue and silt in the seepage water, preventing subsequent fine particles from clogging the inlet holes; on the other hand, it can disperse the seepage flow, avoiding local water accumulation from impacting the water diversion channel and extending its service life. The seepage water pretreated by the crushed stone layer is then filtered a second time through the polypropylene composite filter cloth on the outer surface of the support frame, intercepting small particulate impurities and preventing impurities from clogging the inlet holes, ensuring long-term unobstructed drainage channels, and solving the problem of waterproofing failure caused by easy clogging of traditional drainage structures.

Description

Technical Field

[0001] This application relates to the field of building waterproofing technology, and in particular to a waterproofing structure for tunnel lining construction joints. Background Technology

[0002] A construction joint refers to the joint formed between concrete poured in stages due to design requirements or construction needs. It's not a physical seam, but rather a bonding surface between the first and second poured concrete sections, created when the first poured concrete exceeds its initial setting time. Leakage at construction joints is a common problem in tunnel engineering. To effectively prevent leakage, most tunnel projects employ waterproofing measures.

[0003] While existing waterproofing structures for tunnel lining construction joints incorporate drainage channels, concrete residue, silt, and other impurities can easily clog these channels with the water flow, leading to channel failure and hindering long-term stable drainage. Furthermore, these channels are prone to wear and cracking due to water impact and tunnel vibration, and the lack of effective longitudinal fixation means the drainage channel is susceptible to vertical displacement, affecting drainage stability and structural lifespan. Therefore, a new waterproofing structure for tunnel lining construction joints is urgently needed. Summary of the Invention

[0004] This embodiment provides a waterproof structure for tunnel lining construction joints, which suffers from problems such as drainage channels being easily blocked by impurities and failure, water diversion channels being easily damaged by impact and vibration and lacking effective fixation, thus affecting drainage stability and structural lifespan.

[0005] According to one aspect of this application, a waterproof structure for tunnel lining construction joints is provided, including a tunnel wall and pre-embedded bolts. A construction joint is provided inside the tunnel wall, and a groove and an installation groove are provided on the upper part of the tunnel wall. A water diversion channel is provided inside the installation groove, and connecting plates are fixedly installed on both sides of the water diversion channel. A support frame is fixedly installed inside the water diversion channel, and multiple water inlet holes are provided on the support frame at equal intervals. A polypropylene composite filter cloth is provided on the outer surface of the support frame, and a layer of crushed stone is provided above the polypropylene composite filter cloth in the water diversion channel.

[0006] In this technical solution, the tunnel wall is provided with a plurality of pre-embedded screws that are evenly distributed inside, and one end of each of the plurality of pre-embedded screws extends into the interior of the mounting groove.

[0007] In this technical solution, one end of the water inlet channel extends into the interior of the groove, and a first rubber sealing gasket is provided inside both the mounting groove and the groove. The connecting plate and the water inlet channel are both distributed on the other side of the first rubber sealing gasket.

[0008] In this technical solution, one end of each of the multiple pre-embedded screws passes through the rubber sealing gasket and the connecting plate, and is threaded with a first nut.

[0009] In this technical solution, a limiting seat is provided inside the mounting groove, a limiting plate is fixedly installed on one side of the limiting seat, an arc-shaped groove is provided on the limiting seat, a buffer pad is provided inside the arc-shaped groove, and the bottom end of the water inlet groove can abut against the buffer pad.

[0010] In this technical solution, a through groove is provided on the limiting plate, and multiple pre-embedded screws pass through the limiting seat and the limiting plate, and extend into the through groove where a second nut is threadedly connected.

[0011] In this technical solution, a second rubber sealing gasket is provided on the limiting seat, and the limiting seat abuts against the mounting groove through the second rubber sealing gasket. The end of the second rubber sealing gasket is wider near the limiting plate and narrower at the end away from the limiting plate.

[0012] In the above embodiments of this application, when seepage water collects in the crushed stone layer, the crushed stone layer can, on the one hand, preliminarily filter concrete residue and silt in the seepage water to prevent subsequent fine particles from clogging the water inlet holes; on the other hand, it can disperse the seepage water flow, avoid local water accumulation from impacting the water diversion channel, and extend the service life of the water diversion channel. The seepage water pretreated by the crushed stone layer is then filtered a second time through the polypropylene composite filter cloth on the outer surface of the support frame to intercept small particulate impurities, prevent impurities from clogging the water inlet holes, ensure that the drainage channel is unobstructed for a long time, and solve the problem that traditional drainage structures are prone to clogging and thus cause waterproofing failure.

[0013] 2. By abutting the bottom of the water diversion channel with the buffer pad, the buffer pad can buffer the force generated by the water flow impact and tunnel vibration through its own elasticity, avoiding wear and cracking caused by hard contact between the bottom of the water diversion channel and the limiting seat, thus extending the service life of the water diversion channel. Then, the pre-embedded screw rod is passed through the limiting seat and the limiting plate, so that the screw rod extends into the through groove of the limiting plate. The second nut is tightened to lock it. The second nut can fix the limiting seat and the limiting plate in the installation groove, further forming a longitudinal limit on the water diversion channel and preventing the water diversion channel from moving up and down. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Fig. 1 This is a three-dimensional structural diagram of one embodiment of the present application;

[0016] Fig. 2 This is a cross-sectional structural diagram of one embodiment of this application;

[0017] Fig. 3 This is a partially enlarged structural schematic diagram of one embodiment of this application.

[0018] In the diagram: 1. Construction joint; 2. Tunnel wall; 3. First rubber gasket; 4. First nut; 5. Embedded bolt; 6. Second nut; 7. Water inlet channel; 8. Buffer pad; 9. Limiting seat; 10. Through groove; 11. Limiting plate; 12. Installation groove; 13. Connecting plate; 14. Crushed stone layer; 15. Groove; 16. Polypropylene composite filter cloth; 17. Water inlet hole; 18. Support frame; 19. Second rubber gasket. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0022] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0023] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] Please see Figs. 1-3 As shown, the waterproof structure for the construction joint of the tunnel lining includes a tunnel wall 2 and a pre-embedded bolt 5. A construction joint 1 is provided inside the tunnel wall 2. A groove 15 and an installation groove 12 are provided on the upper part of the tunnel wall 2. A water diversion channel 7 is provided inside the installation groove 12. Connecting plates 13 are fixedly installed on both sides of the water diversion channel 7. A support frame 18 is fixedly installed inside the water diversion channel 7. Multiple water inlet holes 17 are provided on the support frame 18 at equal intervals. A polypropylene composite filter cloth 16 is provided on the outer surface of the support frame 18. A gravel layer 14 is provided above the polypropylene composite filter cloth 16 in the water diversion channel 7.

[0026] In this technical solution, the tunnel wall 2 is provided with a plurality of pre-embedded screws 5 distributed at equal intervals, and one end of each of the plurality of pre-embedded screws 5 extends into the interior of the mounting groove 12.

[0027] In this technical solution, one end of the water inlet trough 7 extends into the interior of the groove 15, and the interiors of the mounting groove 12 and the groove 15 are both provided with a first rubber sealing gasket 3. The connecting plate 13 and the water inlet trough 7 are both distributed on the other side of the first rubber sealing gasket 3.

[0028] In this technical solution, one end of each of the multiple pre-embedded screws 5 passes through the rubber sealing gasket 3 and the connecting plate 13, and is threadedly connected to the first nut 4.

[0029] In this technical solution, a limiting seat 9 is provided inside the mounting groove, and a limiting plate 11 is fixedly installed on one side of the limiting seat 9. An arc-shaped groove is provided on the limiting seat 9, and a buffer pad 8 is provided inside the arc-shaped groove. The bottom end of the water channel 7 can abut against the buffer pad 8.

[0030] In this technical solution, the limiting plate 11 has a through groove 10, and a plurality of the pre-embedded screws 5 pass through the limiting seat 9 and the limiting plate 11, and extend into the through groove 10 to be threadedly connected to a second nut 6.

[0031] In this technical solution, a second rubber sealing gasket 19 is provided on the limiting seat 9. The limiting seat 9 abuts against the mounting groove 12 through the second rubber sealing gasket 19. The end of the second rubber sealing gasket 19 near the limiting plate 11 is wider and the end away from the limiting plate 11 is narrower.

[0032] It should be noted that anti-loosening washers are provided on one side of both the first nut and the second nut in this application to prevent the first nut and the second nut from loosening.

[0033] When this application is in use, if water seepage occurs at the tunnel construction joint 1, the first rubber sealing gasket 3 acts as an initial waterproof barrier, preventing water seepage from the construction joint 1 from directly penetrating into the tunnel interior through the gaps in the trench. A small amount of seepage that breaks through the initial seal will flow into the installation trench 12 and collect in the crushed stone layer 14 along the trench. The crushed stone layer 14 can initially filter concrete 2 residues and silt in the seepage water, preventing subsequent fine particles from clogging the water inlet hole 17; on the other hand, it can disperse the seepage flow, preventing local water accumulation from impacting the water diversion channel 7 and extending the service life of the water diversion channel 7. The seepage water pretreated by the crushed stone layer 14 is then filtered a second time through the polypropylene composite filter cloth 16 on the outer surface of the support frame 18 to intercept small particulate impurities. The polypropylene composite filter cloth 16 can filter silt, concrete 2 debris, and other impurities in the seepage water, preventing... Impurities block the water inlet hole 17 to ensure long-term unobstructed drainage channels, solving the problem of waterproofing failure caused by easy blockage of traditional drainage structures. Multiple water inlet holes 17 collect seepage water and direct it to the outside of the tunnel or the drainage system, preventing seepage water from accumulating at construction joints and causing lining erosion and steel corrosion. Then, the screw 5 pre-embedded in the tunnel wall 2 passes through the first rubber sealing gasket 3 and the connecting plate 13, and the first nut 4 is tightened. During the tightening process of the first nut 4, the connecting plate 13 will be squeezed towards the sealing gasket 3, so that the first rubber sealing gasket 3 is tightly attached to the inner wall of the installation groove 12, the groove 15 and the outer wall of the water diversion channel 7, sealing the gaps of each contact surface. At the same time, the water diversion channel 7 is fixed in the installation groove 12 to prevent the water diversion channel 7 from loosening and shifting and affecting the drainage effect when the tunnel is displaced due to ground settlement and temperature changes in the later stage.

[0034] The bottom end of the water diversion channel 7 abuts against the buffer pad 8. The buffer pad 8 can buffer the force generated by the water flow impact and tunnel vibration of the water diversion channel 7 through its own elasticity, avoiding wear and cracking caused by hard contact between the bottom end of the water diversion channel 7 and the limiting seat 9, thus extending the service life of the water diversion channel 7. Then, the pre-embedded screw 5 is passed through the limiting seat 9 and the limiting plate 11, so that the pre-embedded screw 5 extends into the through groove 10 of the limiting plate 11. The second nut 6 is tightened. The second nut 6 can fix the limiting seat 9 and the limiting plate 11 in the installation groove, further forming a longitudinal limit for the water diversion channel 7, preventing the water diversion channel 7 from moving up and down. At the same time, the second rubber sealing gasket 19 on the limiting seat 9 will be tightly embedded in the gap between the inner wall of the installation groove and the limiting seat 9 under the pressure of the limiting seat 9, which can seal the water seepage channel between the installation groove and the limiting seat 9, forming a double waterproof system and improving the overall sealing reliability of the construction joint.

[0035] The advantages of this application are:

[0036] 1. When seepage water gathers in the gravel layer 14, the gravel layer 14 can initially filter concrete residue and silt in the seepage water to prevent fine particles from clogging the inlet hole 17. On the other hand, it can disperse the seepage flow, avoid local water accumulation from impacting the water diversion channel 7, and extend the service life of the water diversion channel 7. The seepage water pretreated by the gravel layer 14 is then filtered a second time through the polypropylene composite filter cloth 16 on the outer surface of the support frame 18 to intercept small particulate impurities, prevent impurities from clogging the inlet hole 17, ensure long-term unobstructed drainage channels, and solve the problem of waterproof failure caused by easy clogging of traditional drainage structures.

[0037] 2. The bottom end of the water diversion channel 7 abuts against the buffer pad 8. The buffer pad 8 can use its own elasticity to buffer the force generated by the water flow impact and tunnel vibration of the water diversion channel 7, avoid the wear and cracking caused by the hard contact between the bottom end of the water diversion channel 7 and the limiting seat 9, and extend the service life of the water diversion channel 7. Then, the pre-embedded screw 5 is passed through the limiting seat 9 and the limiting plate 11, so that the pre-embedded screw 5 extends into the through groove 10 of the limiting plate 11. The second nut 6 is tightened. The second nut 6 can fix the limiting seat 9 and the limiting plate 11 in the installation groove, further forming a longitudinal limit on the water diversion channel 7 and preventing the water diversion channel 7 from moving up and down.

[0038] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A waterproof structure for tunnel lining construction joints, comprising a tunnel wall (2) and pre-embedded bolts (5), characterized in that: The tunnel wall (2) has a construction joint inside. The tunnel wall (2) has a groove (15) and an installation groove (12) on its upper surface. The installation groove (12) has a water inlet trough (7) inside. Both sides of the water inlet trough (7) are fixedly installed with connecting plates (13). The water inlet trough (7) has a support frame (18) fixedly installed inside. The support frame (18) has multiple water inlet holes (17) distributed at equal intervals. The outer surface of the support frame (18) is provided with a polypropylene composite filter cloth (16). The water inlet trough (7) is located above the polypropylene composite filter cloth (16) and has a gravel layer (14) above it.

2. The waterproof structure for tunnel lining construction joints according to claim 1, characterized in that: The tunnel wall (2) is provided with a plurality of pre-embedded screws (5) distributed at equal intervals, and one end of each of the pre-embedded screws (5) extends into the interior of the mounting groove (12).

3. The waterproof structure for tunnel lining construction joints according to claim 1, characterized in that: One end of the water inlet channel (7) extends into the interior of the groove (15). The interior of both the mounting groove (12) and the groove (15) is provided with a first rubber sealing gasket (3). The connecting plate (13) and the water inlet channel (7) are both distributed on the other side of the first rubber sealing gasket (3).

4. The waterproof structure for tunnel lining construction joints according to claim 2, characterized in that: One end of each of the pre-embedded screws (5) passes through the first rubber sealing gasket (3) and the connecting plate (13), and is threadedly connected to the first nut (4).

5. The waterproof structure for tunnel lining construction joints according to claim 1, characterized in that: The mounting groove (12) is provided with a limiting seat (9) inside. A limiting plate (11) is fixedly installed on one side of the limiting seat (9). An arc-shaped groove is provided on the limiting seat (9). A buffer pad (8) is provided inside the arc-shaped groove. The bottom end of the water channel (7) can abut against the buffer pad (8).

6. The waterproof structure for tunnel lining construction joints according to claim 5, characterized in that: The limiting plate (11) has a through groove (10), and multiple pre-embedded screws (5) pass through the limiting seat (9) and the limiting plate (11) and extend to the inside of the through groove (10) where a second nut (6) is threaded.

7. The waterproof structure for tunnel lining construction joints according to claim 6, characterized in that: The limiting seat (9) is provided with a second rubber sealing gasket (19). The limiting seat (9) abuts against the mounting groove (12) through the second rubber sealing gasket (19). The second rubber sealing gasket (19) is wider at one end near the limiting plate (11) and narrower at the other end away from the limiting plate (11).

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