Buried waterstop in tunnel joint and tunnel structure

Abstract

The utility model relates to tunnel joint waterproof technology field discloses a kind of tunnel joint middle buried type waterstop and tunnel structure. Tunnel joint middle buried type waterstop, including first waterstop unit and second waterstop unit, first waterstop unit includes first drainage part and first plate body part, and second waterstop unit includes second drainage part and second plate body part;First waterstop unit and second waterstop unit are nested clamping by first drainage part and second drainage part between, to realize the detachable rotation connection layout between first waterstop unit and second waterstop unit, and the nested clamping portion between first waterstop unit and second waterstop unit has drainage hole. The included angle of middle buried type waterstop can be adjusted according to the actual angle of corner, relative to the corner shape of different section connecting position, section position of expansion of traditional linear middle buried type waterstop, reduce the torsional bending of waterstop, reduce stress, improve waterproof effect and service life.

Description

Technical Field

[0001] This utility model relates to the field of tunnel joint waterproofing technology, and in particular, to an embedded waterstop strip in tunnel joints. Furthermore, this utility model also relates to a tunnel structure including the aforementioned embedded waterstop strip in tunnel joints. Background Technology

[0002] The design of tunnel waterproofing and drainage systems is an important part of tunnel design, construction and operation. As an important part of the tunnel waterproofing and drainage system, improper joint waterproofing can lead to excessive water pressure at the lining joints, resulting in local leakage, lining cracks and even serious water inrush safety problems.

[0003] Currently, tunnel construction often involves enlarging cross-sections, and many underwater tunnels with high waterproofing requirements employ a combination of construction methods. The cross-sectional sizes at the connection points of different methods vary, and these transition points often involve corners requiring waterproofing. Existing conventional straight-type embedded waterstops are not well-suited to the angles at these corners, often requiring significant twisting of the waterstop structure to accommodate the angle. This subjects the embedded waterstop structure to considerable stress, reducing both its waterproofing capacity and service life. Currently, tunnel construction involves numerous abrupt and gradual cross-sectional transitions, and there is still no suitable embedded waterstop applicable to waterproofing the joints at different cross-section connection points and corners of enlarged cross-sections. Utility Model Content

[0004] This utility model provides an embedded waterstop for tunnel joints and a tunnel structure. The included angle of the embedded waterstop can be adjusted according to the actual angle of the corner. Compared with the traditional straight embedded waterstop, it can better adapt to the connection position of different sections and the corner shape of the enlarged section position in the tunnel construction process, reduce the twisting and bending of the waterstop, reduce the stress, and improve the waterproof effect and service life. This solves the technical problems of poor mechanical properties, poor waterproof effect and short service life of the existing straight embedded waterstop when it is applicable to waterproofing of the corner joints of different sections and enlarged section positions in tunnels.

[0005] According to one aspect of the present invention, an embedded waterstop strip for tunnel joints is provided, comprising a first waterstop unit and a second waterstop unit. The first waterstop unit includes a first drainage portion and a first plate portion, and the second waterstop unit includes a second drainage portion and a second plate portion. The first waterstop unit and the second waterstop unit are nested and snapped together through the first drainage portion and the second drainage portion to achieve a detachable rotatable connection between the first waterstop unit and the second waterstop unit. The nested and snapped portion between the first waterstop unit and the second waterstop unit has a drainage hole.

[0006] Furthermore, the first drainage section includes a first base ring and a first insertion ring arranged sequentially along the axial direction. The free end of the first insertion ring extends radially outward to form a first snap-fit ​​edge. The second drainage section includes a second sleeve ring, which is sleeved on the outside of the first insertion ring and axially limited by the first snap-fit ​​edge, thereby realizing the relative rotation arrangement between the first water-stop unit and the second water-stop unit. The center hole of the first base ring and the center hole of the first insertion ring are combined to form a drainage hole.

[0007] Furthermore, a water-stop groove is provided on the mating surface between the first base ring and the second sleeve ring; or a combination structure of a water-stop strip and a water-stop groove is provided on the mating surface between the first base ring and the second sleeve ring.

[0008] Furthermore, first extension ribs are respectively provided on both sides of the first plate portion in the direction of rotation relative to the second plate portion, and the first extension ribs are arranged in the vertical direction along the side wall of the first plate portion.

[0009] Furthermore, the first extended ribs on both sides of the first plate body are arranged in a corresponding manner, or the first extended ribs on both sides of the first plate body are arranged in a staggered manner.

[0010] Furthermore, first water-stop portions are evenly distributed between two adjacent first extended ribs on the first plate body.

[0011] Furthermore, the second plate portion is provided with second extension ribs on both sides of the first plate portion in the direction of rotation relative to the first plate portion, and the second extension ribs are provided in the direction perpendicular to the side wall of the first plate portion.

[0012] Furthermore, the second extended ribs on both sides of the second plate body are arranged in a corresponding manner, or the second extended ribs on both sides of the second plate body are arranged in a staggered manner.

[0013] Furthermore, second water-stop portions are evenly distributed between two adjacent second extended ribs on the second plate body.

[0014] According to another aspect of the present invention, a tunnel structure is also provided, which adopts the above-mentioned embedded waterstop in the tunnel joint. The first end of the embedded waterstop in the tunnel joint is pre-embedded in the structure at a preset position, and the second end of the embedded waterstop in the tunnel joint is rotated to a position that matches the secondary molded lining layer to be poured, and is matched and connected with the poured secondary molded lining layer.

[0015] This utility model has the following beneficial effects:

[0016] This utility model relates to an embedded waterstop in tunnel joints. The first and second waterstop units are rotatably connected via a nested connection at the drainage section. This allows the angle between the first and second waterstop units to be freely adjusted according to the actual tunnel conditions, avoiding stress concentration caused by the forced twisting of traditional waterstops and significantly improving the ability to match the shape of abrupt / gradual cross-sections. The drainage holes at the nested connection work in conjunction with the drainage system, guiding seepage water outwards through the channels to reduce backfill water pressure and preventing water seepage along the joint, achieving dual protection through a combination of drainage and blocking. The separate design of the first and second waterstop units allows for independent installation and angle pre-adjustment, solving the problem of traditional integral waterstops in complex cross-section construction. This design addresses the challenges of positioning while reducing the risk of damage during transportation and installation. The rotating connection mechanism allows the waterstop to release stress under tunnel settlement and misalignment through relative rotation between units and the micro-deformation capability of the hollow structure with drainage holes, ensuring the integrity of the overall structure under dynamic loads. The nested snap-fit ​​interface and the drainage hole channels form a multi-level waterproof barrier, allowing water to be drained through the drainage system even if local sealing fails, preventing direct penetration into the lining. The embedded waterstop throughout the tunnel joint, through its modular and adjustable angle design, systematically solves the problems of installation deformation, deterioration of mechanical properties, and long-term reliability at cross-sectional transition points of traditional waterstops without relying on material performance parameter optimization.

[0017] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of the embedded waterstop in the tunnel joint after being assembled according to a preferred embodiment of the present invention;

[0020] Figure 2 This is a structural diagram of two different embedded waterstop components before assembly in a preferred embodiment of this utility model.

[0021] Figure 3 This is a schematic diagram illustrating the installation effect at the corner joint of a tunnel abrupt cross-section according to a preferred embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram illustrating the installation effect at the corner joint of a tunnel gradient section according to a preferred embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram illustrating the installation effect at a joint in a typical location within a tunnel, representing a preferred embodiment of this utility model.

[0024] Legend:

[0025] 100. First water-stop unit; 101. First drainage section; 1011. First base ring; 1012. First insertion ring; 1013. First snap-fit ​​edge; 102. First plate section; 103. First extension rib; 104. First water-stop section; 200. Second water-stop unit; 201. Second drainage section; 2011. Second sleeve ring; 202. Second plate section; 203. Second extension rib; 204. Second water-stop section; 300. Drainage hole; 400. Embedded water-stop strip in tunnel joint; 500. Structure at preset position; 600. Cast-in-place secondary molded lining layer; 700. Tunnel joint; 800. Asphalt-impregnated wood fiberboard; 900. Reinforcing bar clip. Detailed Implementation

[0026] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0027] Figure 1 This is a schematic diagram of the structure of the embedded waterstop in the tunnel joint after being assembled according to a preferred embodiment of the present invention; Figure 2 This is a structural diagram of two different embedded waterstop components before assembly in a preferred embodiment of this utility model. Figure 3 This is a schematic diagram illustrating the installation effect at the corner joint of a tunnel abrupt cross-section according to a preferred embodiment of the present invention. Figure 4 This is a schematic diagram illustrating the installation effect at the corner joint of a tunnel gradient section according to a preferred embodiment of the present invention. Figure 5 This is a schematic diagram illustrating the installation effect at a joint in a typical location within a tunnel, representing a preferred embodiment of this utility model.

[0028] like Figure 1 and Figure 2As shown, the embedded waterstop in the tunnel joint of this embodiment includes a first waterstop unit 100 and a second waterstop unit 200. The first waterstop unit 100 includes a first drainage part 101 and a first plate part 102. The second waterstop unit 200 includes a second drainage part 201 and a second plate part 202. The first waterstop unit 100 and the second waterstop unit 200 are nested and snapped together through the first drainage part 101 and the second drainage part 201 to realize a detachable rotatable connection between the first waterstop unit 100 and the second waterstop unit 200. The nested and snapped part between the first waterstop unit 100 and the second waterstop unit 200 has a drainage hole 300. This utility model relates to an embedded waterstop in tunnel joints. The first waterstop unit 100 and the second waterstop unit 200 are rotatably connected via a nested connection at the drainage section. This allows the angle between the first waterstop unit 100 and the second waterstop unit 200 to be freely adjusted according to the actual tunnel working conditions, avoiding stress concentration caused by the forced twisting of traditional waterstops and significantly improving the ability to match the shape of abrupt / gradual cross-sections. The drainage holes 300 in the nested connection section work in conjunction with the drainage system, guiding seepage water out in a directional manner through the holes to reduce backing water pressure, and preventing water from seeping along the joint, achieving dual protection of "drainage and blocking." The separate design of the first waterstop unit 100 and the second waterstop unit 200 allows for independent installation and angle pre-adjustment, solving the problems of traditional integral waterstops. The waterstop addresses the challenge of positioning during complex cross-section construction, while also reducing the risk of damage during transportation and installation. The rotating connection mechanism allows the waterstop to release stress under tunnel settlement and misalignment deformation through relative rotation between units and the micro-deformation capability of the hollow structure with drainage holes 300, ensuring the integrity of the overall structure under dynamic loads. The nested snap-fit ​​interface and the drainage holes 300 form a multi-level waterproof barrier, allowing for drainage even in the event of local seal failure, preventing direct infiltration into the lining. The embedded waterstop throughout the tunnel joint, through its modular and adjustable angle design, systematically solves the problems of installation deformation, deterioration of mechanical properties, and long-term reliability at cross-section transition points of traditional waterstops without relying on material performance parameter optimization.

[0029] like Figure 1 and Figure 2As shown, in this embodiment, the first drainage section 101 includes a first base ring 1011 and a first insertion ring 1012 arranged sequentially along the axial direction. The free end of the first insertion ring 1012 extends radially outward to form a first snap-fit ​​edge 1013. The second drainage section 201 includes a second sleeve ring 2011, which is sleeved on the outside of the first insertion ring 1012 and axially limited by the first snap-fit ​​edge 1013, thereby realizing the relative rotation arrangement between the first water-stopping unit 100 and the second water-stopping unit 200. The central hole of the first base ring 1011 and the central hole of the first insertion ring 1012 are combined to form a drainage hole 300. The nested engagement of the first insertion ring 1012 and the second sleeve ring 2011 forms an axially limited but circumferentially rotating connection mechanism, ensuring that the first water-stop unit 100 and the second water-stop unit 200 can rotate freely relative to each other while avoiding the risk of axial dislocation caused by unrestrained rotation. The first base ring 1011 and the first snap-fit ​​edge 1013 form a double-ring contact surface seal with the second sleeve ring 2011 from both ends, maintaining a continuous surface seal during rotation to prevent water seepage through the connection interface and achieve waterproof integrity during rotation. The drainage hole 300, formed by the combination of the center hole of the first base ring 1011 and the first insertion ring 1012, forms a straight-through water passage. The axial limiting effect of the first snap-fit ​​edge 1013 on the second sleeve ring 2011 effectively restricts axial movement caused by construction vibration or ground settlement, ensuring the long-term positional stability of the corner connection structure. The unit can be separated by axially releasing the mechanical connection of the second sleeve ring 2011, allowing for the replacement of damaged parts without damaging the tunnel structure, significantly reducing the impact of maintenance work on tunnel operation.

[0030] In this embodiment, a water-stop groove is provided on the mating surface between the first base ring 1011 and the second sleeve ring 2011; or a combination structure of a water-stop strip and a water-stop groove is provided on the mating surface between the first base ring 1011 and the second sleeve ring 2011. The synergistic effect of the water-stop groove and the water-stop strip forms a three-level sealing system. The first-level seal is achieved by the mechanical pressing surface of the first base ring 1011 and the second connecting ring 2011. The second-level seal fills the microscopic gaps through the elastic deformation of the water-stop strip. The third-level seal utilizes the self-filling effect of the expanding colloid generated by the water-stop groove under seepage pressure to completely block the seepage path. The concave structure of the water-stop groove provides reserved space for material deformation during rotation, avoiding local peeling of the sealing surface caused by angle adjustment in traditional planar bonding, and ensuring the integrity of the sealing interface during rotation adjustment. When the external water pressure increases, the water-swellable material pre-placed in the water-stop groove expands in volume under seepage, forming a sealing tightness that is positively correlated with the pressure, effectively coping with water pressure fluctuations during tunnel operation. The reserved space of the water-stop groove can accommodate the dimensional deformation of the material caused by temperature changes, avoiding cracking of the sealing surface caused by thermal stress concentration.

[0031] like Figure 1 and Figure 2 As shown, in this embodiment, the first plate portion 102 is provided with first extension ribs 103 on both sides of the first plate portion 102 in the direction of rotation relative to the second plate portion 202. The first extension ribs 103 are arranged in the vertical direction of the side wall of the first plate portion 102. The first extension rib 103 forms a physical positioning reference surface, creating a mechanically embedded relationship during concrete pouring to ensure the structural stability of the pre-embedded connection of the waterstop. The first extension rib 103 forms a multi-directional interlocking interface with the concrete vertically, increasing pull-out resistance and effectively resisting the upward buoyancy and lateral extrusion forces generated during the vibration operation during pouring. The first extension rib 103 evenly distributes the water pressure borne by the waterstop to the concrete structure, reducing the local stress peak and preventing circumferential cracks in the lining concrete due to stress concentration. The first extension rib 103 and the first plate 102 form a T-shaped three-dimensional constraint frame, restricting the waterstop from axial torsion or radial slippage during operation, ensuring the long-term geometric stability of the corner joint. The equally spaced grooves reserved between the first extension ribs 103 provide deformation space for concrete shrinkage, preventing the waterstop interface from peeling off due to material shrinkage differences.

[0032] like Figure 1 and Figure 2 As shown, in this embodiment, the first extended ribs 103 on both sides of the first plate portion 102 are arranged correspondingly, or the first extended ribs 103 on both sides of the first plate portion 102 are arranged in a staggered manner. When the first extended ribs 103 on both sides of the first plate portion 102 are arranged correspondingly, the mirror symmetry of the two sides of the first extended ribs 103 forms an equal stress transmission path, so that the rotational torque is evenly distributed to the concrete matrix, avoiding lining cracking caused by stress concentration on one side, which is suitable for high water pressure sudden change cross sections; the symmetrical ribs form a double track guide system, which restricts the lateral displacement of the second plate portion 202 in the rotation plane, ensures that the deviation of the corner axis is reduced, and ensures structural stability. The first extended ribs 103 on both sides of the first plate 102 are staggered. The staggered ribs are arranged in a gradient along the axial direction of the plate, forming a step-by-step interlocking structure that perfectly adapts to the curvature change of the gradually changing cross-section tunnel and avoids the step deformation of the traditional structure in the gradually changing section. The staggered layout reduces the density of ribs in the same cross-section, reduces the amount of material used while maintaining the equivalent embedment capacity, and at the same time improves the flow density of concrete in the gap between the ribs and improves the interfacial bonding strength.

[0033] like Figure 1 and Figure 2As shown, in this embodiment, first water-stop portions 104 are evenly distributed between two adjacent first extension ribs 103 on the first plate body 102. The adjacent first extension ribs 103 and the intermediate first water-stop portion 104 form a three-level waterproof barrier: the first level of sealing is achieved by the mechanical interlocking of the first extension ribs 103; the second level of sealing is achieved by the elastic pressing action of the first water-stop portion 104; the third level of sealing utilizes the air pressure balance effect formed by the cavity between the ribs to block the seepage path, thereby improving the reliability of waterproofing; the first water-stop portion 104, as a flexible transition unit, transforms the rigid connection between adjacent first extension ribs 103 into an elastic connection, so that the corner deformation stress is evenly distributed to each rib, eliminating the shear stress concentration phenomenon generated by the traditional continuous rib structure; the compressibility of the first water-stop portion 104 allows for construction deviations in the rib spacing, and compensates for positioning errors through its own deformation, thereby improving the installation qualification rate compared to the rigid connection structure.

[0034] like Figure 1 and Figure 2 As shown, in this embodiment, the second plate portion 202 is provided with second extension ribs 203 on both sides of the second plate portion 102 in the direction of rotation relative to the first plate portion 102. The second extension ribs 203 are arranged in the vertical direction of the side wall of the first plate portion 102. The second extension rib 203 forms a physical positioning reference surface, creating a mechanically embedded relationship during concrete pouring to ensure the structural stability of the pre-embedded connection of the waterstop. The second extension rib 203 forms a multi-directional interlocking interface with the concrete vertically, increasing pull-out resistance and effectively resisting the upward buoyancy and lateral extrusion forces generated during the vibration operation during pouring. The second extension rib 203 evenly distributes the water pressure borne by the waterstop to the concrete structure, reducing local stress peaks and preventing circumferential cracks in the lining concrete due to stress concentration. The second extension rib 203 and the second plate 202 form a T-shaped three-dimensional constraint frame, restricting the waterstop from axial torsion or radial slippage during operation, ensuring the long-term geometric stability of the corner joint. The equally spaced grooves reserved between the second extension ribs 203 provide deformation space for concrete shrinkage, preventing the waterstop interface from peeling off due to material shrinkage differences.

[0035] like Figure 1 and Figure 2As shown, in this embodiment, the second extended ribs 203 on both sides of the second plate portion 202 are arranged correspondingly, or the second extended ribs 203 on both sides of the second plate portion 202 are arranged in a staggered manner. When the second extended ribs 203 on both sides of the second plate portion 202 are arranged correspondingly, the mirror symmetry of the two sides of the second extended ribs 203 forms an equal stress transmission path, so that the rotational torque is evenly distributed to the concrete matrix, avoiding lining cracking caused by stress concentration on one side, which is suitable for cross-sections with sudden changes in high water pressure; the symmetrical ribs form a double track guiding system, which restricts the lateral displacement of the second plate portion 202 in the rotation plane, ensures that the deviation of the corner axis is reduced, and ensures structural stability. The second extended ribs 203 on both sides of the second plate 202 are staggered. The staggered ribs are arranged in a gradient along the axial direction of the plate, forming a step-by-step interlocking, which perfectly adapts to the curvature change of the gradually changing cross-section tunnel and avoids the step deformation of the traditional structure in the gradually changing section. The staggered layout reduces the density of ribs in the same cross section, reduces the amount of material used while maintaining the equivalent embedment capacity, and at the same time improves the flow density of concrete in the gap between the ribs and improves the interface bonding strength.

[0036] like Figure 1 and Figure 2 As shown, in this embodiment, second water-stop portions 204 are evenly distributed between two adjacent second extension ribs 203 on the second plate body 202. Adjacent second extension ribs 203 and the intermediate second water-stop portion 204 form a three-level waterproof barrier: the first-level seal is achieved by the mechanical interlocking of the second extension ribs 203; the second-level seal is achieved through the elastic compression of the second water-stop portion 204; the third-level seal utilizes the air pressure balance effect formed by the inter-rib cavity to block the seepage path, thus improving waterproof reliability. The second water-stop portion 204, as a flexible transition unit, transforms the rigid connection between adjacent second extension ribs 203 into an elastic connection, uniformly distributing the corner deformation stress to each rib and eliminating the shear stress concentration phenomenon generated by traditional continuous rib structures. The compressibility of the second water-stop portion 204 allows for construction deviations in rib spacing, compensating for positioning errors through its own deformation, thus improving the installation qualification rate compared to rigid connection structures.

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the tunnel structure in this embodiment employs the aforementioned embedded waterstop 400 in the tunnel joint. The first end of the embedded waterstop 400 is pre-embedded within the structure 500 at a predetermined position. The second end of the embedded waterstop 400 rotates to a position matching the secondary molded lining layer to be poured, and connects with the poured secondary molded lining layer 600. The first end of the embedded waterstop 400 forms a rigid anchor point within the structure 500 at the predetermined position. The second end of the embedded waterstop 400 achieves precise matching with the poured secondary molded lining layer 600 through rotational adjustment, eliminating the forced twisting installation caused by construction errors in traditional integral waterstops and improving the accuracy of corner fitting. The rotating connection design allows the embedded waterstop 400 to automatically adjust its angle when the poured secondary molded lining layer 600 experiences uneven settlement during operation, maintaining the integrity of the sealing surface while reducing additional stress. The embedded waterstop 400 in the tunnel joint forms a chemical-mechanical composite bond with both ends of the new and old concrete. The pre-embedded end is anchored to the pre-positioned structure 500 via the first extension rib 103. The rotating end utilizes secondary pouring to form a micro-locking effect, constructing a continuous waterproof barrier. The drainage hole 300 built into the rotating connection and the water-conducting channel in the cast secondary molded lining layer 600 form a three-dimensional drainage network, which can reduce seepage pressure and effectively prevent joint seepage damage caused by high water pressure. This structural system, by integrating pre-embedded anchoring, dynamic adjustment, and secondary sealing technologies, systematically solves the industry pain points of poor construction adaptability and high deformation sensitivity in waterproofing of complex cross-section tunnel joints 700.

[0038] In practice, a tunnel joint embedded waterstop 400 is provided. This embedded waterstop is composed of two parts, each including a drainage section (first drainage section 101 and second drainage section 201) and a plate (first plate section 102 and second plate section 202). The waterstop is connected as a whole by a snap-fit ​​structure in the drainage section. Figure 1 As shown. The drainage section has drainage holes of 300mm and a certain torsional deformation capacity, while the waterstop section is fixed in the extended ribs and between adjacent ribs in the secondary lining cast-in-place concrete. The assembled embedded waterstop can have its angle adjusted by rotating the drainage section, such as... Figure 2 As shown, the angle of the waterstop is fixed by adhesive bonding and embedded in the secondary lining layer of the tunnel using the traditional embedded waterstop construction method. The adjustable-angle embedded waterstop can better adapt to the connection positions of different sections during tunnel construction, expand the angular shape of the section position, reduce the twisting and bending of the waterstop, and improve the waterproofing effect and service life compared with the traditional straight embedded waterstop.

[0039] For the connection points of different sections of the tunnel and the enlarged section, the corner positions are usually constructed in sections and in reverse. Therefore, construction joints between lining layers are inevitable. Water will enter the tunnel through the corresponding joints, increasing the burden on tunnel waterproofing and safety risks. These joints will be initially treated by filling with asphalt-impregnated wood fiberboard 800, which has good water resistance and corrosion resistance. Then, a tunnel joint embedded waterstop 400 will be installed at the joint.

[0040] Reference Figure 1 and Figure 2 The embedded waterstop 400 in the tunnel joint is composed of two parts: a first drainage section 101, a second drainage section 201, a first plate section 102, and a second plate section 202. The first drainage section 101 and the second drainage section 201 are hollow in the middle and have O-shaped drainage holes 300 with a certain deformation capacity. The first drainage section 101 and the second drainage section 201 also contain buckles for splicing the two parts of the waterstop. The upper buckle of one side of the buckle is slightly larger than the area of ​​the O-shaped drainage hole 300, which ensures that the buckle structure is reliable and forms a complete whole. The whole formed by splicing can rotate around the first drainage section 101 and the second drainage section 201 to change the angle between the first plate section 102 and the second plate section 202 on both sides, so as to adapt to different cross-sectional connection positions and the angle of the enlarged cross-sectional position. The adjusted angle is fixed by adhesive. Each first plate portion 102 or second plate portion 202 has multiple extended ribs (first extended rib 103 or second extended rib 203) perpendicular to the plate on both sides, and a water-stop portion (first water-stop portion 104 or second water-stop portion 204) is provided between two extended ribs on the same side.

[0041] Reference Figure 3 The embedded waterstop 400 in the tunnel joint is pre-embedded in the designated position before the secondary formwork lining layer is poured, and is fixed firmly by the steel bar clip 900 (the installation process is existing technology and will not be described in detail here). Then it is embedded in the secondary formwork lining layer when the secondary formwork lining layer 600 is poured.

[0042] Reference Figure 3 , Figure 4 , Figure 5 The angled joints of tunnels fall into three main categories, such as... Figure 3 The tunnel abrupt cross-section corner joint shown is as follows: Figure 4 The tunnel gradient section corner joint shown and as shown Figure 5 The tunnel joints shown are typically located in tunnels. The embedded waterstop 400 in the tunnel joints can adjust the angle of the plate according to the specific angle of these joints to meet the waterproofing requirements of the joints at the corresponding locations.

[0043] Compared to the traditional straight-type embedded waterstop 400 installed at corners due to twisting and bending, this utility model of tunnel joint embedded waterstop has the advantages of adapting to any angle in the tunnel, being easy to fix, and being able to adapt to the connection position of different sections during tunnel construction and expand the corner shape of the section position by adjusting the angle, thereby achieving the waterproof effect of the joint, reducing the stress of twisting and bending of the waterstop, ensuring the water-stopping effect, and improving the service life.

[0044] Any matters not covered in this utility model are common knowledge.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

[0047] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A type of embedded waterstop in tunnel joints, characterized in that, It includes a first water-stopping unit (100) and a second water-stopping unit (200). The first water-stopping unit (100) includes a first drainage part (101) and a first plate part (102). The second water-stopping unit (200) includes a second drainage part (201) and a second plate part (202). The first water-stop unit (100) and the second water-stop unit (200) are nested and snapped together by the first drainage part (101) and the second drainage part (201) to realize the detachable rotatable connection between the first water-stop unit (100) and the second water-stop unit (200). The nested and snapped part between the first water-stop unit (100) and the second water-stop unit (200) has a drainage hole (300).

2. The embedded waterstop in tunnel joints according to claim 1, characterized in that, The first drainage section (101) includes a first base ring (1011) and a first insertion ring (1012) arranged sequentially along the axial direction. The free end of the first insertion ring (1012) extends radially outward to form a first snap-fit ​​edge (1013). The second drainage section (201) includes a second sleeve ring (2011). The second sleeve ring (2011) is sleeved on the outside of the first insertion ring (1012) and axially limited by the first snap-fit ​​edge (1013), thereby realizing the relative rotation arrangement between the first water-stop unit (100) and the second water-stop unit (200). The center hole of the first base ring (1011) and the center hole of the first insertion ring (1012) together form a drain hole (300).

3. The embedded waterstop in tunnel joints according to claim 2, characterized in that, A water-stop groove is provided on the mating surface between the first base ring (1011) and the second sleeve ring (2011); or The mating surface between the first base ring (1011) and the second sleeve ring (2011) is provided with a combination structure of water-stop strips and water-stop grooves.

4. The embedded waterstop in tunnel joints according to any one of claims 1 to 3, characterized in that, First extension ribs (103) are respectively provided on both sides of the first plate part (102) in the direction of rotation relative to the second plate part (202), and the first extension ribs (103) are arranged in the vertical direction along the side wall of the first plate part (102).

5. The embedded waterstop in tunnel joints according to claim 4, characterized in that, The first extension ribs (103) on both sides of the first plate body (102) are arranged in a corresponding manner, or the first extension ribs (103) on both sides of the first plate body (102) are arranged in a staggered manner.

6. The embedded waterstop in tunnel joints according to claim 5, characterized in that, First water-stopping parts (104) are evenly distributed between two adjacent first extension ribs (103) on the first plate body (102).

7. The embedded waterstop in tunnel joints according to any one of claims 1 to 3, characterized in that, The second plate part (202) is provided with second extension ribs (203) on both sides of the first plate part (102) in the direction of rotation. The second extension ribs (203) are arranged in the vertical direction along the side wall of the first plate part (102).

8. The embedded waterstop in tunnel joints according to claim 7, characterized in that, The second extension ribs (203) on both sides of the second plate body (202) are arranged in a corresponding manner, or the second extension ribs (203) on both sides of the second plate body (202) are arranged in a staggered manner.

9. The embedded waterstop in tunnel joints according to claim 8, characterized in that, Second water-stopping parts (204) are evenly distributed between two adjacent second extension ribs (203) on the second plate body (202).

10. A tunnel structure, characterized in that, The tunnel joint embedded waterstop (400) according to any one of claims 1 to 9 is used. The first end of the tunnel joint embedded waterstop (400) is pre-embedded in the structure (500) at a preset position. The second end of the tunnel joint embedded waterstop (400) is rotated to a position that matches the secondary molded lining layer to be poured, and is matched and connected with the poured secondary molded lining layer (600).

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