Permanent water stop structure of aqueduct connecting seam

Abstract

The utility model relates to the technical field of water conservancy projects, in particular to a permanent water stop structure of an aqueduct connecting seam. The aqueduct comprises a first aqueduct body, a second aqueduct body, an interface transition layer, a thermoplastic buffer layer, a water stop belt and an elastic supporting layer. A filling groove used for being filled with second-stage anchor sealing concrete is formed in the end face of the first aqueduct. The second aqueducts and the first aqueducts are arranged at intervals to form connecting seams; the interface transition layer is arranged in the connecting seam, and the top face of the interface transition layer serves as an upstream face. The thermoplastic buffer layer is adjacently arranged below the interface transition layer; the water-stop belt is adjacently arranged below the thermoplastic buffer layer, the two ends of the water-stop belt are pre-buried in the first aqueduct and the second aqueduct respectively, and a gap is formed between one end of the water-stop belt and the bottom of the filling groove; the elastic supporting layer is adjacently arranged below the water stop belt. The water stopping effect is stable, and construction is relatively easy and convenient.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of water conservancy projects, in particular to a permanent water stop structure of a connecting joint of an aqueduct. BACKGROUND

[0002] With the continuous development and improvement of water conservancy project construction in China, large aqueducts, which can effectively regulate the balance of water resources between regions, are increasingly applied in actual projects. The aqueduct, also known as a water crossing bridge, is mainly used for conveying channel water flow across rivers, valleys, depressions, roads and the like. The large aqueduct mainly adopts a reinforced concrete structure. In order to prevent cracks or damage of the structure due to temperature changes (thermal expansion and cold contraction), a gap of a certain size is reserved at certain intervals along the length direction of the aqueduct, and a expansion joint device is arranged at the gap to enable the main body structure of the aqueduct to horizontally expand and contract along the length direction. Meanwhile, the expansion joint device of the aqueduct also needs to have a water stop function. If the water stop function is not available, acid and alkali corrosive substances will react with the concrete at the beam end of the expansion joint after the aqueduct leaks, resulting in loose and peeled concrete and corroded structural steel bars.

[0003] The commonly used expansion joint device of the aqueduct in the prior art includes an adhesive type, a buried type and a filler type. The water stop structure at the joint between adjacent spans of the aqueduct is disclosed in the Chinese utility model patent with the publication number CN205444119U. The water stop structure is provided with a concrete water stop between the two span trough bodies and an L-shaped groove. A pre-embedded part is pre-embedded on the L-shaped groove, the concrete water stop is welded on the pre-embedded part, and then fine stone concrete is poured in the L-shaped groove. The construction process is complex. UTILITY MODEL CONTENT

[0004] The application provides a permanent water stop structure of a connecting joint of an aqueduct, which has stable water stop effect and relatively simple construction process.

[0005] The application is achieved by the following technical scheme:

[0006] A permanent water stop structure of a connecting joint of an aqueduct, comprising:

[0007] A first aqueduct, an end face of the first aqueduct being provided with a filling groove for filling second-stage sealing and anchoring concrete;

[0008] A second aqueduct, the second aqueduct being arranged at intervals with the first aqueduct to form a connecting joint;

[0009] An interface transition layer, the interface transition layer being arranged in the connecting joint and a top face of the interface transition layer serving as a water-facing face;

[0010] A thermoplastic buffer layer, the thermoplastic buffer layer being arranged adjacent to below the interface transition layer;

[0011] A waterstop is arranged adjacent to the thermoplastic buffer layer, wherein the waterstop is embedded in the first and second aqueducts at two ends thereof, and the waterstop is spaced apart from the bottom of the filling groove at one end thereof.

[0012] An elastic support layer is arranged adjacent to the waterstop.

[0013] The permanent waterstop structure of the aqueduct joint provided in the application can effectively avoid the concrete shrinkage stress concentration area, reduce the interface peeling risk, and reserve the expansion space for the second-stage anchor sealing concrete, thereby forming a stress gradient transition. The interface transition layer has a rigid impermeable effect, the thermoplastic buffer layer realizes flexible buffering, the waterstop realizes waterstop, and the elastic support layer provides elastic compensation. The four-layer composite structure forms a modulus gradient design to realize stress dissipation in stages, so that the displacement adaptability is improved. Meanwhile, the two ends of the waterstop are directly embedded in the first and second aqueducts, which is convenient for construction and can ensure the stability of the waterstop, thereby simplifying the construction process.

[0014] In some optional embodiments, the waterstop is configured as a U-shaped red copper waterstop sheet in the middle.

[0015] In some optional embodiments, the two ends of the waterstop are configured as a bending structure.

[0016] In some optional embodiments, the bending directions of the two ends of the waterstop are the same.

[0017] In some optional embodiments, the elastic support layer is attached to the outer arc surface of the U-shaped structure of the waterstop.

[0018] In some optional embodiments, the bottom of the filling groove is a wedge surface structure, wherein the side of the bottom of the filling groove away from the joint is higher than the side close to the joint.

[0019] In some optional embodiments, the interface transition layer is configured as a two-component polysulfide sealant layer.

[0020] In some optional embodiments, the thermoplastic buffer layer is configured as a polyethylene caulking board.

[0021] In some optional embodiments, the elastic support layer is configured as a closed-cell foam board.

[0022] In some optional embodiments, the joint includes a first section and a second section arranged in the center from top to bottom, wherein the width of the first section is greater than the width of the second section.

[0023] The thermoplastic buffer layer is located in the first section, and the elastic support layer is located in the second section.

[0024] Compared with the prior art, the application has the following advantages and beneficial effects:

[0025] The permanent water stop structure of the aqueduct connecting joint provided by the application can effectively avoid the concrete shrinkage stress concentration area, reduce the interface peeling risk, and reserve expansion space for the second-stage anchor sealing concrete, forming a stress gradient transition; the interface transition layer has a rigid impermeable effect, the thermoplastic buffer layer realizes flexible buffering, the water stop belt realizes water stopping, and the elastic support layer provides elastic compensation, and the four-layer composite structure forms a modulus gradient design to realize stress dissipation step by step, so that the displacement adaptability is improved; at the same time, the two ends of the water stop belt in the application are directly embedded in the first aqueduct and the second aqueduct, which is convenient for construction and can ensure the stability of the water stop belt, and can simplify the construction process. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and constitute a part of the application, illustrate the embodiments of the application and are used to explain the embodiments of the application, but do not constitute a limitation on the embodiments of the application. In the drawings:

[0027] Figure 1 The permanent water stop structure cross-sectional view of the aqueduct connecting joint provided by the embodiments of the application is shown in the drawings;

[0028] Figure 2 The water stop belt structure schematic view provided by the embodiments of the application is shown in the drawings;

[0029] Figure 3 The first aqueduct and the second aqueduct arrangement cross-sectional view provided by the embodiments of the application is shown in the drawings.

[0030] The marks in the drawings and the corresponding names of the parts are as follows:

[0031] 1-First aqueduct, 2-Second aqueduct, 3-Interface transition layer, 4-Thermoplastic buffer layer, 5-Water stop belt, 6-Elastic support layer, 7-Second-stage anchor sealing concrete, 8-First section, 9-Second section. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the application more clear and obvious, the application will be further described in detail below in combination with the embodiments and drawings, and the schematic embodiments of the application and the description thereof are used to explain the application, but not as a limitation on the application.

[0033] As Figures 1-2As shown, the application provides a permanent water stop structure of aqueduct connecting joint, which comprises a first aqueduct 1, a second aqueduct 2, an interface transition layer 3, a thermoplastic buffer layer 4, a water stop belt 5 and an elastic support layer 6; the first aqueduct 1 is provided with a filling groove for filling the second-stage anchor concrete 7 at the end face; the second aqueduct 2 is arranged in a spaced manner with the first aqueduct 1 to form a connecting joint; the interface transition layer 3 is arranged in the connecting joint and the top surface thereof serves as a water-facing surface; the thermoplastic buffer layer 4 is arranged adjacent to the interface transition layer 3 below; the water stop belt 5 is arranged adjacent to the thermoplastic buffer layer 4 below, wherein the two ends of the water stop belt 5 are respectively embedded in the first aqueduct 1 and the second aqueduct 2, and the one end of the water stop belt 5 has a spacing with the groove bottom of the filling groove; the elastic support layer 6 is arranged adjacent to the water stop belt 5 below.

[0034] The permanent water stop structure of aqueduct connecting joint provided by the application can effectively avoid the concrete shrinkage stress concentration area by designing the spacing between the filling groove and the end of the water stop belt 5, reduce the interface peeling risk, reserve the expansion space for the second-stage anchor concrete 7, form the stress gradient transition, and has the rigid impermeability effect of the interface transition layer 3, realizes the flexible buffering through the thermoplastic buffer layer 4, realizes the water stop through the water stop belt 5, and provides the elastic compensation through the elastic support layer 6, so that the four-layer composite structure forms the modulus gradient design to realize the stress step-by-step dissipation, and the displacement adaptability is improved; meanwhile, the two ends of the water stop belt 5 in the application are directly embedded in the first aqueduct 1 and the second aqueduct 2, which is convenient for construction and can ensure the stability of the water stop belt 5, and can simplify the construction process.

[0035] In the application, the end face of the first aqueduct 1 and the second aqueduct 2 refers to the end face of one end in the length direction of the first aqueduct 1 or the length direction of the second aqueduct 2.

[0036] In the application, the filling groove is opened from the end face of the first aqueduct 1, that is, the filling groove is communicated with the connecting joint, and the filling groove penetrates the first aqueduct 1 upward to realize the pouring of concrete.

[0037] In some optional embodiments, the water stop belt 5 is constructed as a red copper water stop sheet with a U-shaped structure in the middle.

[0038] In the application, the red copper material has excellent corrosion resistance and ductility, and cooperates with the U-shaped structure to adapt to multidirectional displacement deformation, maintains sealing integrity when bearing water flow impact and temperature change, the geometric design of the U-shaped structure increases the deformation absorption space, the structure strength is strengthened through cold working, is combined with the concrete stably, significantly reduces the leakage risk, and realizes long-term reliable waterproof effect.

[0039] In some optional embodiments, the two ends of the water stop belt 5 are constructed as a bending structure.

[0040] In the embodiments of the present application, after the waterstop 5 is embedded in the first aqueduct 1 and the second aqueduct 2, the bending structure at both ends of the waterstop 5 can improve the anchoring effect, thereby improving the stability of the waterstop 5 and ensuring that the waterstop 5 has a long-term effective waterproof function.

[0041] In some optional embodiments, the bending directions of the waterstop 5 at both ends are the same, for example, in the working state, both ends of the waterstop 5 are bent upward.

[0042] In the embodiments of the present application, the symmetrical bending structure enhances the tightness of the interface between the waterstop 5 and the concrete, forms a continuous anti-seepage barrier, and effectively blocks potential water seepage paths; at the same time, the same bending direction makes the stress distribution more balanced, can adapt to multi-directional displacement deformation of the joint synchronously, and reduces the risk of material distortion caused by the difference between the double-side deformations. The design also simplifies the construction positioning process, ensures the consistency of the anchoring force at both ends, improves the structure's anti-pulling-off ability, and strengthens the overall deformation coordination, thereby maintaining stable waterproof performance under complex working conditions.

[0043] In some optional embodiments, the elastic support layer 6 is attached to the outer arc surface of the U-shaped structure of the waterstop 5.

[0044] In the embodiments of the present application, the elastic material forms a cooperative deformation mechanism by closely attaching to the U-shaped curved surface, which can not only constrain the excessive deformation of the waterstop 5 through the reverse supporting force to maintain the geometric stability of the U-shaped structure, but also uniformly transmit external loads to the support layer, thereby significantly reducing the risk of local stress concentration of the waterstop 5. The design also enhances the self-resetting ability of the waterstop 5 through the elastic energy storage effect, so that the waterstop 5 can recover to the sealed state more quickly after the joint displacement. In addition, the physical limiting function of the support layer can prevent the U-shaped structure from accidentally collapsing during construction, improve the installation reliability, and ultimately achieve more durable waterproof effect under dynamic load.

[0045] In some optional embodiments, the bottom of the filling groove is a wedge surface structure, wherein the side of the bottom of the filling groove away from the connecting joint is higher than the side close to the connecting joint.

[0046] In the embodiments of the present application, the filling groove adopts a wedge-shaped bottom design, and the structural features thereof optimize the distribution of the filling material through the gravity guiding effect. The inclined bottom surface can naturally guide the anchoring concrete to flow to the joint side, forming a high-density filling band in the near-joint area, and effectively eliminating the end cavity defect that is prone to occur in traditional flat-bottom grooves. The wedge-shaped structure produces a gradual compaction effect when the joint is displaced, and continuously pushes the material to the joint interface through the inclined surface sliding, thereby strengthening the dynamic sealing effect. The design can provide a visual filling termination line for construction, ensure that the material usage and the joint shape are accurately matched, and realize the dual improvement of structural reliability and construction economy.

[0047] In some optional embodiments, the interface transition layer 3 is configured as a two-component polysulfide sealant layer.

[0048] In the embodiments of the present application, the interface transition layer 3 adopts a two-component polysulfide sealant layer. The material realizes controllable curing through accurate proportioning of A / B components, forms a flexible interface with high bonding strength and elastic modulus, can form a chemical anchoring effect with heterogeneous substrates such as concrete and metal, and can buffer structural deformation stress through flexible molecular chain hinge. The sulfur end group structure endows excellent medium penetration resistance, can block water vapor migration channels and resist acid and alkali corrosion, and the three-dimensional network structure formed after curing can maintain elastic memory function within a certain temperature range, can adapt to a certain degree of expansion and contraction of the joint without debonding, and is suitable for application occasions of aqueduct connecting joints. In addition, the two-component system realizes self-leveling filling through viscosity control during construction, effectively fills micro defects in the interface, and constructs a continuous and dense waterproof transition zone.

[0049] In some optional embodiments, the thermoplastic buffer layer 4 is configured as a polyethylene flashing board.

[0050] In the embodiments of the present application, the polyethylene board with closed pores absorbs joint displacement energy through elastic compression, effectively disperses shear stress generated by thermal expansion and cold contraction of concrete, provides stable backing support for the sealant, prevents tearing of the sealant caused by three-sided bonding, and can block capillary water infiltration paths. During construction, it can be cut according to the modulus of the joint width, and its self-lubricating surface can also reduce the risk of sealant interface peeling, forming a permanent stress buffer isolation zone.

[0051] In some optional embodiments, the elastic support layer 6 is configured as a closed-cell foam board.

[0052] In the embodiments of the present application, the elastic support layer 6 adopts a closed-cell foam board, and the independently closed cell units form an elastic matrix, which can absorb dynamic load energy and realize recoverable deformation, effectively relieving stress concentration caused by structural displacement. It provides compressive strength while providing a uniform support interface for the upper sealing system, preventing interface peeling caused by stress transmission. During construction, a continuous support surface can be constructed by hot melt welding, and its honeycomb energy dissipation structure can also block the transmission of sound waves and heat flow, forming a multifunctional interface layer with mechanical buffering and physical protection.

[0053] In some optional embodiments, as shown in Figure 3 the connecting joint includes a first section 8 and a second section 9 arranged in the center from top to bottom, wherein the width of the first section 8 is greater than the width of the second section 9; the thermoplastic buffer layer 4 is located in the first section 8, and the elastic support layer 6 is located in the second section 9.

[0054] In the embodiments of the present application, the connecting joint adopts a sectional structure design, and the first section 8 (wide area) and the second section 9 (narrow area) arranged in the center from top to bottom constitute a differentiated functional layer. The thermoplastic buffer layer 4 is arranged in the wide first section 8, and the large width allowance of the thermoplastic buffer layer 4 allows the material to flow plastically to a certain extent, and dissipate kinetic energy impact through viscoelastic hysteresis effect; the elastic support layer 6 of the narrow second section 9 is constructed by a closed-cell foam board to build a stable base and form a gradient support system. The two-section structure realizes stress step attenuation through modulus matching, and the wide flexible layer absorbs dynamic deformation first, and then the narrow rigid layer can inhibit residual displacement from being conducted to the main structure.

[0055] In the embodiments of the present application, the centering arrangement refers to that the width direction midpoint of the first section 8 coincides with the width direction midpoint of the second section 9.

[0056] The above describes the embodiments of the present application by specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the description. Although the description of the present application is introduced in combination with some embodiments, this does not mean that the features of the present application are limited to the embodiments. On the contrary, the purpose of introducing the present application in combination with the embodiments is to cover other options or modifications that can be extended based on the claims of the present application. In order to provide a deep understanding of the present application, many specific details are included in the above description. The present application can also be implemented without using these details. In addition, in order to avoid confusion or obscure the focus of the present application, some specific details are omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0057] It should be noted that in the description of the application, similar reference numerals and letters in different drawings represent similar items, therefore, once an item is defined in one drawing, it is not necessary to further define and explain it in the subsequent drawings. In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0058] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A permanent waterstop structure for an aqueduct joint, characterized in that The application relates to a first aqueduct (1) which is provided with a filling groove at an end face for filling with second-stage anchor concrete (7); a second aqueduct (2) which is arranged in a spaced manner with the first aqueduct (1) to form a connecting joint; an interface transition layer (3) which is arranged in the connecting joint and whose top surface serves as a water-facing surface; a thermoplastic buffer layer (4) which is arranged adjacent to the bottom of the interface transition layer (3); a waterstop (5) which is arranged adjacent to the bottom of the thermoplastic buffer layer (4), wherein the two ends of the waterstop (5) are embedded in the first aqueduct (1) and the second aqueduct (2) respectively, and the waterstop (5) has a spacing with the groove bottom of the filling groove at one end; and an elastic support layer (6) which is arranged adjacent to the bottom of the waterstop (5). The waterstop (5) is configured as a U-shaped structure of red copper waterstop sheet at the middle part. The two ends of the waterstop (5) are configured as a bending structure. The bending directions of the two ends of the waterstop (5) are the same. The elastic support layer (6) is attached to the outer arc surface of the U-shaped structure of the waterstop (5). The groove bottom of the filling groove is configured as a wedge surface structure, wherein the side of the groove bottom of the filling groove which is away from the connecting joint is higher than the side which is close to the connecting joint. The interface transition layer (3) is configured as a two-component polysulfide sealant layer.

2. The permanent waterstop structure for an aqueduct joint according to claim 1, characterized by, The thermoplastic buffer layer (4) is configured as a polyethylene caulking board.

3. The permanent waterstop structure for an aqueduct joint according to claim 1, characterized by, The elastic support layer (6) is configured as a closed-cell foam board.

4. The permanent waterstop structure of an aqueduct joint according to claim 3, characterized in that, The connecting joint comprises a first section (8) and a second section (9) which are arranged in a central manner from top to bottom, wherein the width of the first section (8) is greater than that of the second section (9).

5. The permanent waterstop structure for an aqueduct joint according to claim 3, characterized by, The thermoplastic buffer layer (4) is arranged in the first section (8), and the elastic support layer (6) is arranged in the second section (9).

6. The permanent waterstop structure for an aqueduct joint according to claim 1, characterized by, ​ 7. The permanent waterstop structure for an aqueduct joint according to claim 1, characterized by, ​ 8. The permanent waterstop structure for an aqueduct joint according to claim 1, characterized by, ​ 9. The permanent waterstop structure for an aqueduct joint according to claim 1, characterized by, ​ 10. The permanent waterstop structure for an aqueduct joint according to claim 1, characterized by, ​ ​

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