Water stopping and preventing structure for aqueduct structural joint

Abstract

The utility model belongs to the technical field of hydraulic structure sealing, and particularly relates to an aqueduct structural joint water stopping and preventing structure. The aqueduct structural joint water-stopping and waterproof structure comprises two aqueduct body sections arranged at intervals, a structural joint is formed by the interval between the two aqueduct body sections, a water-stopping structure is constructed in the area where the structural joint is located, continuous waterproof layers are constructed on the surfaces of the water-stopping structure and the two aqueduct body sections, and caulking grooves are formed in the surfaces of the two aqueduct body sections correspondingly; the two ends, in the arrangement direction of the two groove body sections, of the waterproof layer extend into the corresponding caulking grooves correspondingly, and the two end faces of the waterproof layer do not protrude out of groove openings of the corresponding caulking grooves. By arranging the caulking grooves, the ends of the waterproof layers can be located in the caulking grooves, and the end faces of the waterproof layers do not protrude out of notches of the corresponding caulking grooves, so that the ends of the waterproof layers can be prevented from being washed by water, the waterproof layers are further prevented from being disengaged from the edges, and the waterproof effect of the structural joint is enhanced.

Description

Technical Field

[0001] The utility model relates to a water stop and waterproof structure for the structural joint of an aqueduct, belonging to the technical field of the sealing of hydraulic structures. Background Art

[0002] An aqueduct, also known as an elevated canal or a water conveyance bridge, is a group of overhead water troughs composed of bridges, tunnels or ditches that span rivers, valleys, depressions and roads. An aqueduct mainly consists of an inlet and outlet section, a trough body, a supporting structure and a foundation, etc. The trough body is mainly used for water conveyance. The trough body includes a plurality of trough body segments arranged at intervals to avoid cracks caused by climate change or uneven settlement due to the excessive length of the trough body. The interval between two adjacent trough body segments forms a structural joint. To prevent water leakage at the structural joint, a water stop and waterproof structure needs to be set in the area where the structural joint is located.

[0003] In the existing water stop and waterproof structure for the structural joint of an aqueduct, such as a water leakage repair structure for the structural joint of a water conveyance aqueduct disclosed in a Chinese utility model patent with the authorization announcement number of CN209669813U and the authorization announcement date of November 22, 2019. This structure (i.e., the water stop and waterproof structure) includes two adjacent trough body segments and the structural joint formed between the two trough body segments. A water stop structure is constructed in the area where the structural joint is located. The water stop structure includes a U-shaped rubber water stop belt, and the U-shaped rubber water stop belt includes a U-shaped part and wing edges on both sides. Among them, the U-shaped part is filled in the structural joint, and asphalt hemp yarn is filled inside. The two wing edges of the U-shaped rubber water stop belt are respectively lapped on the adjacent trough body segments, and water stop pressure plates are arranged above the wing edges. Corresponding opening grooves are provided on the trough body segments. Embedded bolts penetrating through the corresponding upper wing edges and the water stop belt pressure plates are arranged at the bottom of the opening grooves. Epoxy structural adhesive is filled between the wing edges and the bottom and side walls of the opening grooves. The water stop belt pressure plate is fixedly pressed against the corresponding wing edge through a nut matching the bolt. A polyethylene foam board and a polysulfide sealant are sequentially filled above the U-shaped part. Epoxy mortar is filled between the polyethylene foam board and the polysulfide sealant and the side walls of the opening grooves. This water stop and waterproof structure also includes a waterproof layer formed by continuously brushing a waterproof coating on the surface of the water stop structure and on the surface of the trough body segments within 1.5 m upstream and downstream of the water stop structure to enhance the waterproof effect of the water stop structure.

[0004] However, to ensure the waterproof effect, the waterproof layer usually has a certain thickness, and the waterproof layer in the above scheme is only brushed on the surface layer of the water stop structure and the corresponding trough body segments, that is, the waterproof layer protrudes from the surface of the trough body segments. Thus, when the aqueduct is in water conveyance operation, both ends of the waterproof layer will be directly in contact with water, and the edge of the waterproof layer will be continuously washed by water. Over time, the end of the waterproof layer will be lifted, and then the entire waterproof layer will come off and fail, resulting in a poor waterproof effect at the position of the structural joint and increasing the risk of water seepage. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a water stop and waterproof structure for the structural joint of a aqueduct, so as to solve the problem that the end of the waterproof layer in the existing water stop and waterproof structure is directly in contact with water and is easily washed open from the edge by water, resulting in a poor waterproof effect at the structural joint.

[0006] To achieve the above purpose, the following technical solution is adopted for the water stop and waterproof structure of the aqueduct structural joint in the present utility model:

[0007] A water stop and waterproof structure for the aqueduct structural joint includes two aqueduct body segments arranged at intervals. The interval between the two aqueduct body segments forms a structural joint, and a water stop structure is constructed in the area where the structural joint is located. A continuous waterproof layer is constructed on the surfaces of the water stop structure and the two aqueduct body segments. Embedded grooves are respectively arranged on the surfaces of the two aqueduct body segments. The two ends of the waterproof layer in the arrangement direction of the two aqueduct body segments respectively extend into the corresponding embedded grooves, and the two end faces of the waterproof layer do not protrude from the notch of the corresponding embedded groove.

[0008] The beneficial effects of the above technical solution are as follows: The present utility model belongs to an improved invention. By respectively arranging embedded grooves on the surfaces of the aqueduct body segments on both sides of the structural joint, the two ends of the waterproof layer in the arrangement direction of the two aqueduct body segments can respectively extend into the corresponding embedded grooves, and the two end faces of the waterproof layer do not protrude from the notch of the corresponding embedded groove, so that the two end faces of the waterproof layer will not be washed by water, and the water flow will directly rush from the surface of the aqueduct body segment to the surface of the waterproof layer. Therefore, it effectively avoids the waterproof layer being washed open from the edge, and enhances the waterproof effect at the structural joint.

[0009] Further, the embedded groove includes a first groove wall and a second groove wall respectively connected to the surface of the aqueduct body segment where it is located. The first groove wall and the second groove wall are directly connected. The first groove wall is located on the side of the second groove wall far from the structural joint, and the waterproof layer covers part or all of the second groove wall.

[0010] Further, the first groove wall is a flat wall and is perpendicular to the surface of the aqueduct body segment where it is located.

[0011] Further, define the arrangement direction of the two aqueduct body segments as the longitudinal direction, and the intersection line of the second groove wall and the longitudinal plane is an oblique line segment.

[0012] Further, the waterproof layer covers all of the second groove wall, and the end face of the waterproof layer is in contact with the first groove wall.

[0013] Further, the width of the embedded groove is 16 - 28 mm, and the depth of the embedded groove is 4 - 6 mm.

[0014] Further, the distance from the embedded groove to the water stop structure is 150 - 250 mm.

[0015] Further, the waterproof layer includes a grid cloth on the inner side and a waterproof coating on the outer side. The grid cloth is arranged in two spaced segments, and the interval between the two segments of the grid cloth corresponds to the structural joint.

[0016] Furthermore, both ends of the waterproof coating are longer than the mesh cloth, and the ends of the mesh cloth do not extend into the embedding groove.

[0017] Furthermore, the thickness of the waterproof coating is not less than 3 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of an embodiment of the aqueduct structural seam water-stopping and waterproofing structure of the utility model;

[0019] Figure 2 for Figure 1 Magnified view of the center slot location.

[0020] In the figure: 1. U-shaped rubber waterstop; 1.1. U-shaped nose; 1.2. front side; 1.3. rear side; 2. groove body; 3. embedded bolts; 4. angle steel; 5. gasket; 6. nut; 7. protective cover; 8. epoxy structural adhesive; 9. asphalt hemp fiber; 10. polyethylene foam board; 11. polysulfide sealant; 12. epoxy mortar; 13. triangular groove; 13.1. first groove wall; 13.2. second groove wall; 14. waterproof layer; 14.1. polyurea; 14.2. mesh cloth. DETAILED DESCRIPTION

[0021] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0022] In view of the technical problems existing in the prior art, the basic technical concept of the utility model is: embedding grooves are respectively arranged at positions corresponding to the two ends of the waterproof layer on the two trough body sections, so that the two ends of the waterproof layer in the arrangement direction of the two trough body sections extend into the corresponding embedding grooves respectively, and the two end surfaces of the waterproof layer do not protrude from the notches of the corresponding embedding grooves, so that the two end surfaces of the waterproof layer will not be washed by water. When the aqueduct is in operation for water delivery, the water flow will directly rush from the surface of the trough body section to the surface of the waterproof layer, thereby effectively preventing the waterproof layer from being washed away by water from the edge, thereby enhancing the waterproof effect at the structural joints.

[0023] Embodiments of the aqueduct structural seam water-stopping and waterproofing structure in the utility model:

[0024] like Figure 1As shown in the figure, the water stop and waterproof structure of the aqueduct structural joint includes two chute sections 2 arranged at intervals. The interval between the two chute sections 2 forms a structural joint, and a water stop structure is constructed in the area where the structural joint is located to prevent water leakage from the structural joint. Define the arrangement direction of the chute section 2 as the front-rear direction. The water stop structure includes a U-shaped rubber water stop belt 1. The U-shaped rubber water stop belt 1 includes a U-shaped nose 1.1 in the middle and two side edges connected to both sides of the U-shaped nose 1.1, namely the front side edge 1.2 and the rear side edge 1.3. Open slots are provided on both of the two chute sections 2, and embedding bolts 3 are arranged at the bottoms of the open slots. The front side edge 1.2 and the rear side edge 1.3 are respectively laid on the bottoms of the open slots of the corresponding chute sections 2 on their respective sides, and through holes for the corresponding embedding bolts 3 to pass through are respectively provided. The U-shaped nose 1.1 is filled in the structural joint, and foaming glue is filled below the U-shaped nose 1.1.

[0025] Angle steels 4 and gaskets 5 are successively arranged above the front side edge 1.2 and the rear side edge 1.3 respectively, and through holes for the corresponding embedded bolts 3 to pass through are provided on both the angle steels 4 and the gaskets 5. Among them, the specifications of the angle steels 4 are all set to 63mm×40mm×6mm, and the through holes on the angle steels 4 are opened on the long sides. At the arc section of the chute body, the short side flange side of the angle steel 4 is cut, and the long side is bent to fit the arc section of the chute body. The angle steel 4 can make the U-shaped rubber water stop belt 1 installed more firmly, and the gasket 5 can further ensure the pressing effect. A nut 6 that is threadedly matched with the embedded bolt 3 is arranged above the gasket 5. The angle steel 4 and the gasket 5 are pressed together with the corresponding side edges of the U-shaped rubber water stop belt 1 through the nut 6. Protective sleeves 7 are respectively arranged on the nuts 6. Epoxy structural adhesive 8 is filled between the front side edge 1.2 and the rear side edge 1.3 and the bottoms and side walls of the open slots of the corresponding chute sections 2, and the epoxy structural adhesive 8 is not applied within a range of 2 - 3 cm on both sides of the U-shaped nose 1.1 to avoid affecting the telescopic deformation of the U-shaped nose 1.1 due to excessive brushing of the epoxy structural adhesive 8, and at the same time prevent the cured overflowing colloid from forming burrs at the U-shaped nose 1.1 and damaging the water stop belt.

[0026] Pitch hemp 9 is filled in the U-shaped nose 1.1. A polyethylene foam board 10 and a polysulfide sealant 11 are successively filled above the pitch hemp 9. Epoxy mortar 12 is filled between the polyethylene foam board 10 and the polysulfide sealant 11 and the side walls of the open slots of the chute section 2, thereby backfilling the open slots on the chute body 2. The pitch hemp 9 can prevent the epoxy mortar 12 from entering the U-shaped nose 1.1 and avoid affecting the telescopic elasticity of the U-shaped rubber water stop belt 1.

[0027] As Figure 1As shown in the figure, the waterstop and waterproof structure of the aqueduct structure joint further includes a waterproof layer 14 continuously applied on the surfaces of the waterstop structure and the two chute sections 2. Grooves are respectively provided on the surfaces of the two chute sections 2. The front and rear ends of the waterproof layer 14 respectively extend into the corresponding grooves, and the end faces of the waterproof layer 14 do not protrude from the openings of the corresponding grooves, so that the water flow will not scour the end faces of the waterproof layer 14, preventing the water flow from lifting the waterproof layer 14 from the edge. The groove includes a first groove wall and a second groove wall respectively connected to the surface of the chute section 2 where it is located. The first groove wall and the second groove wall are directly connected, and the first groove wall is located on the side of the second groove wall away from the structure joint. In this embodiment, as Figure 1 and Figure 2 shown, the groove is arranged as a triangular groove 13, where the first groove wall 13.1 is a plane wall perpendicular to the surface of the chute section 2 where it is located, and the first groove wall 13.1 and the second groove wall 13.2 are directly connected and form a certain angle. Taking the front-back direction as the longitudinal direction, the intersection line of the second groove wall 13.2 and the longitudinal plane is an oblique line segment. The waterproof layer 14 does not protrude from the opening of the triangular groove 13. Thus, when the aqueduct is in water conveyance operation, the water flow can directly flow from the surface of the chute section 2 to the surface of the waterproof layer 14 without scouring the end face of the waterproof layer 14, further preventing the waterproof layer 14 from being washed open by the water flow from the edge and enhancing the waterproof effect at the structure joint. The waterproof layer 14 covers part or all of the second groove wall 13.2. In this embodiment, the waterproof layer 14 covers all of the second groove wall 13.2, and the end face of the waterproof layer 14 contacts the first groove wall 13.1. At this time, the end face of the waterproof layer 14 can be completely prevented from contacting water, and it is convenient for construction. The width of the triangular groove 13 is 16 - 28 mm, the depth is 4 - 6 mm, and the distance from the triangular groove 13 to the waterstop structure is 150 - 250 mm. In this embodiment, the width of the triangular groove 13 is 20 mm, the depth is 5 mm, and the distance from the triangular groove 13 to the waterstop structure is 200 mm.

[0028] As Figure 1 and Figure 2 shown, the waterproof layer 14 includes a grid cloth 14.2 on the inner side and a waterproof coating on the outer side. The thickness of the waterproof coating is not less than 3 mm. In this embodiment, the waterproof coating uses polyurea 14.1, which has good waterproof and anti-corrosion performance, and the painting thickness of the polyurea 14.1 is 3 mm. The grid cloth 14.2 is arranged in two spaced sections, and the space between the two sections of the grid cloth 14.2 corresponds to the structure joint. In the use scenario where the expansion and contraction range of the structure joint is relatively large, it can prevent the problem that the grid cloth 14.2 fails to meet the expansion and contraction requirements of the structure joint due to insufficient elastic strength and breaks, resulting in water seepage at the structure joint. The end of the grid cloth 14.2 does not extend into the triangular groove 13, which is convenient for layout. In this embodiment, the distance between the grid cloth 14.2 and the triangular groove 13 is 1 cm.

[0029] The repair construction process flow of the water stop and waterproof structure of the aqueduct structural joint includes the demolition of the old water stop and waterproof structure and the construction of the new water stop and waterproof structure. The specific process is as follows:

[0030] S1. Demolition of the concrete on both sides of the structural joint: After emptying the aqueduct, first conduct a general survey and photography of the original appearance of all structural joints to retain the original image data for later inspection and maintenance work. Use a hand-held electric pick to demolish the fine aggregate concrete of the structural joint at the part that needs to be treated. High-impact equipment such as a pneumatic pick is prohibited. The demolition sequence is: start from the edge of the structural joint and gradually demolish towards both sides. During the demolition process, it is prohibited to damage the precast structure of the beam-type aqueduct.

[0031] S2. Inspection and analysis: Clean the working surface, check the damage condition of the U-shaped rubber water stop, and conduct a preliminary analysis of the damage cause.

[0032] S3. Demolition of nuts, angle steels, and gaskets: Use an electric drill with a sleeve to remove the nuts. During the demolition process, violent demolition is strictly prohibited to prevent damage to the embedded bolts. After the nuts are removed, remove the angle steels and gaskets. When removing the angle steels, register and number them and place them neatly in order for the pre-bending and drilling of the new angle steels in the later stage.

[0033] S4. Demolition of the U-shaped rubber water stop: Use an electric pick with a flat shovel-shaped pick head to reduce the damage to the concrete base surface. When demolishing, remove the original rubber water stop from one end to the other end to prevent damage to the aqueduct body concrete during the demolition process.

[0034] S5. Cleaning of the concrete base surface of the aqueduct section 2: Use a diamond grinding disc to polish the original bonding surface at the bottom of the upper groove of the aqueduct section 2, and thoroughly remove the adhesives and other accessory materials on the bonding surface (during the polishing process, use a sleeve to protect the embedded bolt 3). Polish until a fresh concrete surface is exposed, and the base surface is required to be smooth and flat. After the base surface is cleaned, use a blower with a hose to clean the bolt holes and seal the holes with tape to prevent construction dust from entering. Use a diamond grinding disc to polish the concrete base surface of the aqueduct section 2 within 20 cm on both sides of the water stop structure.

[0035] S6. Setting of the embedded groove: Set a triangular embedded groove 13 with a depth of 5 mm and a width of 2 cm at the end of the side line of the concrete base surface of the aqueduct section 2 within 20 cm on both sides of the water stop structure. The triangular embedded groove 13 can effectively prevent the later waterproof layer 4 from being washed away by water.

[0036] S7, Processing and pre-positioning of angle steel 4: The new angle steel 4 adopts an unequal-leg type with a specification of 63×40×6 mm. Drill holes on the long side of the angle steel 4, and the hole diameter and pitch shall conform to the bolt size and spacing; for the angle steel 4 in the arc section, the short-side flange side needs to be cut, and its long side shall be pre-bent according to the curvature of the building surface. After the pre-bending is completed, it shall be sent to the site for inspection of the fitting degree with the building. To save the construction period, the newly purchased angle steel 4 can be pre-bent and drilled in the processing factory with reference to the removed angle steel 4.

[0037] S8, Installation of U-shaped rubber waterstop 1: Before installation, first fill the inside of the structural joint with foaming glue to prevent the rubber waterstop from contacting the air and extend its durability. Drill holes on the U-shaped rubber waterstop 1, and the hole diameter and spacing shall conform to the bolt size and spacing; apply epoxy structural adhesive 8 at the bottom of the groove, and do not apply the structural adhesive within a range of 2-3 cm on both sides of the structural joint, and the thickness of the adhesive layer is 2-5 mm; lay the drilled U-shaped rubber waterstop 1 along the entire length of the structural joint, and start installation from the top of one end of the structural joint, and use a roller to compact it, and there should be colloid overflow on both sides of the waterstop.

[0038] S9, Installation of angle steel 4 and thick gasket: Before installing the angle steel 4 and gasket, apply epoxy structural adhesive 8 on the back and install the angle steel 4 and thick gasket, and tighten the nut 6 after adjusting the position; then use epoxy structural adhesive 8 to fill the gap between the concrete and the rubber waterstop; when installing the angle steel 4, adjust the curvature of the newly processed angle steel 4 to ensure firm compaction.

[0039] S10, Packing of asphalt hemp rope 9: Fill the U-shaped nose 1.1 of the U-shaped rubber waterstop 1 with asphalt hemp rope 9. When filling the asphalt hemp rope 9, the rubber waterstops on both sides and the concrete surface shall be covered and protected to prevent pollution of the working surface.

[0040] S11, Filling of polyethylene foam board 10: Fill the polyethylene foam board 10 above the asphalt hemp rope 9 and the U-shaped nose 1.1 of the U-shaped rubber waterstop 1. The polyethylene foam board 10 has a certain plasticity to facilitate the expansion and contraction of the structural joint.

[0041] S12, Backfilling of epoxy mortar 12: Backfill the groove on the second body section with epoxy mortar 1; after the epoxy mortar 12 cures, polish the surface of the epoxy mortar 12 with a angle grinder and clean it up.

[0042] S13, Filling of polysulfide sealant 11: First stick paper tape on the epoxy mortar 12 base surfaces on both sides of the structural joint, and use a caulking gun to fill the polysulfide sealant 11 into the groove formed by the epoxy mortar 12 on both sides and the polyethylene foam board 10. The surface of the polysulfide sealant 11 shall be as flat as possible, and the top surface shall be flush with the epoxy mortar 12 on both sides; tear off the paper tape on both sides after the polysulfide sealant 11 cures.

[0043] S14, Construction of the waterproof layer 14: First, inspect the base surface of the trough section 2, the surface of the epoxy mortar 12, and the surface of the polyethylene sealant. It is required to be smooth and pore-free. If there are holes or the like, they can be repaired with epoxy mortar 12 or epoxy putty. After the base surface passes the inspection, apply the special primer for the polyurea 14.1. After the primer dries on the surface (usually 8 - 12 hours), scrape and apply the first coat of polyurea 14.1. If the time interval between the primer and the subsequent process exceeds 36 hours, the primer needs to be reapplied, and after it dries on the surface, then scrape and apply the polyurea 14.1. After the first coat of polyurea 14.1 dries on the surface (usually 3 - 8 hours), scrape and apply the second coat. First, scrape and apply a layer of polyurea 14.1. After scraping and applying is completed, immediately lay the fiberglass mesh 14.2 between the structural joint and the grooves on both sides, and then slowly scrape the fiberglass mesh 14.2 once without coating material, and then thinly apply a layer of polyurea 14.1 to cover the fiberglass mesh 14.2. The end of the fiberglass mesh 14.2 does not extend into the triangular groove 13, and is 3 cm away from the end of the triangular groove 13. After the second coat of polyurea 14.1 dries on the surface, continue to apply the third and fourth coats to ensure that the total thickness of the polyurea 14.1 coating is 3 mm. If the thickness of the polyurea 14.1 does not meet the requirements, the number of scraping and applying passes must be increased until the required thickness is reached. After scraping and applying is completed and it dries on the surface, trim the waterproof layer 14, cut off the polyurea 14.1 that exceeds the depth of the triangular groove 13, so that the end face of the waterproof layer 14 does not protrude from the notch of the corresponding triangular groove 13.

[0044] S15, Standing still: Since the polyurea 14.1 reacts and cures under the action of moisture in the air, after the construction of the polyurea 14.1 is completed and it dries on the surface, it needs to stand still for 72 hours. At the same time, good protection of the finished product should be done to prevent external impact.

[0045] Among them, the key points in the installation process of the U-shaped rubber waterstop 1 are as follows:

[0046] 1. It must be installed from one side to the other side to prevent intermediate wrinkles.

[0047] 2. The opening diameter of the U-shaped rubber waterstop 1 must be the same as that of the bolt. At the same time, on-site drilling of the wrong hole position should be avoided to prevent the emergence of leakage channels.

[0048] 3. When applying the epoxy structural adhesive 8, attention should be paid to protecting the embedded bolt 3 to avoid the structural adhesive contaminating the bolt and preventing the nut 6 from being unable to be removed during later maintenance and replacement.

[0049] 4. Apply the epoxy structural adhesive 8 on the back of the angle steel 4 and the gasket. At the same time, use the structural adhesive to seal the edges of the gaps between the waterstop and the concrete on both sides to prevent the formation of water seepage channels at the embedded bolt 13 part, the waterstop, and the concrete gap.

[0050] 5. Do not apply the structural adhesive within 2 - 3 cm on both sides of the structural joint. One is to avoid affecting the telescopic deformation of the U-shaped nose 1.1 due to excessive application of the structural adhesive, and the other is to prevent the burrs from being formed at the nose part of the rubber waterstop after the overflowed colloid cures, damaging the waterstop.

[0051] During the fastening process of nut 6, apply moderate force. After the initial fastening is completed, use a torque wrench for fastening with a torque of not less than 5 kg.

[0052] In addition, the key points for the construction of polyurea 14.1 are as follows:

[0053] 1. The ratio of the special primer for polyurea 14.1 should be accurate, and at the same time, stir and let it stand for defoaming strictly according to the manufacturer's instructions.

[0054] 2. During construction in low-temperature seasons, it needs to be heated in a 60 °C water bath until it reaches a flowing state before use; after opening the barrel, it should be used up within 24 hours to prevent it from becoming unusable due to drawing after oxidation; before using it again within 24 hours, remove the surface cream skin.

[0055] 3. The raw materials of polyurea 14.1 should be avoided from being stirred to prevent air from entering the polyurea 14.1 raw materials and forming bubbles, which will affect the quality of the polyurea 14.1 raw materials.

[0056] 4. The scraping interval time between adjacent layers of polyurea 14.1 should be within 24 hours. If it exceeds 24 hours, first wipe the surface of the polyurea 14.1 coating with cotton yarn dipped in activator, and then scrape the new polyurea 14.1 after waiting for 5 minutes until the surface is dry.

[0057] 5. When scraping polyurea 14.1, try to scrape it in place at one time and avoid repeated scraping.

[0058] 6. The on-site construction environment temperature is required to be above 5 °C, and the base surface of the trough section 2 is dry.

[0059] 7. Each layer of polyurea 14.1 should not be in contact with water within 2 hours after construction, and external force impact should be prevented within 72 hours.

[0060] In other embodiments, the thickness of the waterproof coating can be set to 4 mm; in other embodiments, it can also be set to 2.5 mm.

[0061] In other embodiments, when setting the laying range of the fiberglass mesh, the end of the fiberglass mesh can be extended into the embedded groove.

[0062] In other embodiments, when setting the laying range of the fiberglass mesh, the fiberglass mesh can be set as a section, and the middle position of the fiberglass mesh exactly corresponds to the structural joint. At this time, a fiberglass mesh with stronger elasticity should be used to meet the expansion and contraction requirements of the structural joint, or the expansion and contraction requirements of the structural joint are small and exactly within the elastic deformation range of the fiberglass mesh.

[0063] In other embodiments, when setting the position of the embedded groove, the distance from the embedded groove to the water stop structure can be set to 150 mm or 250 mm, and it can also be set to 180 mm.

[0064] In other embodiments, when setting the dimensions of the groove, the width of the groove can be set to 16 mm, 28 mm, or 24 mm; the depth of the groove can be set to 4 mm, 6 mm, or 5.5 mm.

[0065] In other embodiments, when setting the position of the end of the waterproof layer, the waterproof layer can only cover a part of the second groove wall, and the end face of the waterproof layer does not contact the first groove wall, that is, there is a certain distance between the end face of the waterproof layer and the first groove wall, such as a distance of 2 mm. At this time, most of the water flow directly flows from the surface of the groove section to the surface of the waterproof layer, and only a small amount of water flow will enter between the waterproof layer and the first groove wall, but the water flow will not wash the end face of the waterproof layer, so the waterproof layer will not be washed open from the edge by the water flow.

[0066] In other embodiments, when setting the structure of the second groove wall of the groove, the intersection line of the second groove wall and the longitudinal vertical plane can be an arc segment.

[0067] In other embodiments, when setting the structure of the first groove wall of the groove, the first groove wall may not be perpendicular to the surface of the groove section, such as an obtuse angle of 91 - 100 degrees with the surface of the groove section, and the cross-section of the groove is similar to a V shape. At this time, when the water flow passes through the groove, most of the water flow will still directly flow from the surface of the groove section to the surface of the waterproof layer, and only a small part will contact the edge of the waterproof layer, but it will not impact the end of the waterproof layer, so the waterproof layer will not be lifted from the edge.

[0068] In other embodiments, when setting the shape of the groove, the groove can further include a third groove wall, and both ends of the third groove wall are respectively connected to the first groove wall and the second groove wall. At this time, the first groove wall and the second groove wall are parallel, and the cross-sectional shape of the groove is similar to a U shape; in other embodiments, the groove can also be set as a semi-circular groove, and at this time, the groove only includes one groove wall, and both ends of the groove wall are respectively connected to the surface of the groove section.

[0069] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still make modifications to the technical solutions recorded in the foregoing embodiments without creative efforts, or make equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water-stopping and waterproof structure for aqueduct structural seams, comprising two trough body sections arranged at intervals, the interval between the two trough body sections forming a structural seam and a water-stopping structure being applied in the area where the structural seam is located, and a continuous waterproof layer being applied on the surface of the water-stopping structure and the two trough body sections, characterized in that: The surfaces of the two groove body sections are respectively provided with embedding grooves, and the two ends of the waterproof layer in the arrangement direction of the two groove body sections respectively extend into the corresponding embedding grooves, and both end surfaces of the waterproof layer do not protrude from the notches of the corresponding embedding grooves.

2. The aqueduct structural seam water-stopping and waterproofing structure according to claim 1 is characterized in that: The embedded groove includes a first groove wall and a second groove wall respectively connected to the surface of the groove body section, the first groove wall and the second groove wall are directly connected, the first groove wall is located on the side of the second groove wall away from the structural seam, and the waterproof layer covers part or all of the second groove wall.

3. The aqueduct structural seam water-stopping and waterproofing structure according to claim 2 is characterized in that: The first groove wall is a plane wall and is perpendicular to the surface of the groove body section where it is located.

4. The aqueduct structural seam water-stopping and waterproofing structure according to claim 2 is characterized in that: The arrangement direction of the two groove body segments is defined as the longitudinal direction, and the intersection line of the second groove wall and the longitudinal plane is defined as the oblique line segment.

5. The aqueduct structural joint water-stopping and waterproofing structure according to any one of claims 2 to 4, characterized in that: The waterproof layer covers the entire second groove wall, and an end surface of the waterproof layer contacts the first groove wall.

6. The aqueduct structural joint water-stopping and waterproofing structure according to any one of claims 1 to 4, characterized in that: The width of the embedding groove is 16 to 28 mm, and the depth of the embedding groove is 4 to 6 mm.

7. The aqueduct structural joint water-stopping and waterproofing structure according to any one of claims 1 to 4, characterized in that: The distance from the embedded groove to the water-stop structure is 150 to 250 mm.

8. The aqueduct structural joint water-stopping and waterproofing structure according to any one of claims 1 to 4, characterized in that: The waterproof layer includes an inner mesh cloth and an outer waterproof coating. The mesh cloth is provided in two sections arranged at intervals, and the interval between the two sections of mesh cloth corresponds to the structural seam.

9. The aqueduct structural seam water-stopping and waterproofing structure according to claim 8, characterized in that: The two ends of the waterproof coating are longer than the mesh cloth, and the ends of the mesh cloth do not extend into the embedding groove.

10. The aqueduct structural seam water-stopping and waterproofing structure according to claim 8, characterized in that: The thickness of the waterproof coating shall not be less than 3mm.

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