Concrete anti-seepage structure
By uniformly adhering geotextile layers to concrete structures and using adhesive and mechanical anchoring components, the problems of cavities and stress concentration between HDPE geomembranes and concrete structures are solved, improving seepage prevention and extending service life.
Patent Information
- Application Number
- CN202520120555.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-01-17
AI Technical Summary
In existing technologies, HDPE geomembranes cannot be directly welded and sealed to concrete structures, resulting in cavities and stress concentration, which affects the seepage prevention effect, especially in the vertical sidewall structure.
The geomaterial layer is uniformly and tightly bonded to the concrete structure and fixed by adhesive layer and mechanical anchoring components to avoid cavities and stress concentration. HDPE geomembrane welding and geotextile stitching are used. Liquid adhesive that melts at 150℃~180℃ is applied to form an adhesive layer and fixed with expansion bolts and stainless steel pressure strips.
This eliminates cavities between geotextiles and concrete structures, avoids stress concentration, extends the service life of the seepage-proof structure, reduces material friction, and improves seepage-proof performance.
Smart Images
Figure CN223824235U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of concrete structure technology, and in particular to a concrete seepage prevention structure. Background Technology
[0002] Leakage can severely impact the durability of concrete structures, leading to a shortened lifespan. Concrete structures require excellent impermeability in various engineering environments, such as hydraulic engineering, underground engineering, and marine engineering, to prevent structural corrosion caused by leakage. For example, in underground engineering projects like subways and tunnels, good impermeability prevents groundwater intrusion and protects structural safety. Therefore, improving the impermeability of concrete structures is crucial for ensuring project safety and extending their service life.
[0003] HDPE geomembrane is a commonly used impermeable geosynthetic material; however, it cannot be directly welded to concrete for a seal. Currently, geosynthetic materials are generally fixed to concrete structures using "cat's paw" structures or mechanical anchoring. However, these methods are only suitable for localized fixation. Cavities exist between the geosynthetic material and the concrete structure, especially in vertical sidewall structures; and the anchoring points of the geosynthetic material experience concentrated stress, making them weak points in impermeable projects and potentially negatively impacting the seepage control effect. Utility Model Content
[0004] To address the aforementioned problems, this utility model provides a concrete seepage-proof structure. By uniformly and tightly adhering a geotextile layer onto the concrete structure, there are no cavities between the geotextile and the concrete structure, especially on the sidewalls of the concrete structure. This does not damage the integrity of the geotextile, eliminates the need for intermediate fixing, avoids stress concentration, reduces the impact of the material's own weight on the seepage-proof material, and reduces friction between the material and the geotextile during operation, thus extending the service life of the seepage-proof structure.
[0005] To achieve the above objectives, this utility model provides a concrete seepage-proof structure, comprising: a concrete structure, an adhesive layer, a geotextile layer, and a mechanical anchoring component;
[0006] The surface of the concrete structure is covered with geotextile layers of a predetermined type, number of layers and sequence. Adhesive layers are provided between the geotextile layers laid on the side surface of the concrete structure and the concrete structure, as well as between the geotextile layers.
[0007] The mechanical anchoring assembly secures the geomaterial layer to the upper surface of the concrete structure.
[0008] In the above technical solution, preferably, the geotextile layer includes a first geotextile layer and other geotextile layers. The first geotextile layer is disposed on the upper surface and side surface of the concrete structure, and the other geotextile layers are disposed on the upper side and outer side of the first geotextile layer. The adhesive layer is disposed between the first geotextile layer and the side surface of the concrete structure, and the adhesive layer is disposed between the other geotextile layers and the outer side of the first geotextile layer.
[0009] In the above technical solution, preferably, the geomaterial layer is made of HDPE geomembrane or geotextile, the thickness of the HDPE geomembrane is greater than or equal to 1.5 mm, the HDPE geomembranes are connected by welding, and the geotextiles are connected by sewing.
[0010] In the above technical solution, preferably, the adhesive layer is formed by applying and solidifying a liquid adhesive melted at 150℃~180℃, with a coating amount of 1.1~1.25kg / m². 2 .
[0011] In the above technical solution, preferably, the mechanical anchoring component includes expansion bolts and stainless steel pressure strips, wherein the diameter of the expansion bolts is not less than 8 mm, the spacing between the expansion bolts is not greater than 0.5 m, and the thickness of the stainless steel pressure strip is not less than 4 mm and the width is not less than 9 cm.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: by uniformly and tightly adhering the geotextile layer on the concrete structure, there are no cavities between the geotextile and the concrete structure, especially on the side walls of the concrete structure, which will not damage the integrity of the geotextile, eliminates the need for intermediate fixation, avoids stress concentration, reduces the impact of the material's own weight on the seepage prevention material, and reduces the friction between the material and the geotextile during operation, thus extending the service life of the seepage prevention structure. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of a concrete seepage-proof structure disclosed in one embodiment of the present utility model;
[0014] Figure 2 This is a schematic diagram illustrating the implementation process of a concrete seepage-proof structure according to an embodiment of this utility model.
[0015] In the diagram, the correspondence between the components and the reference numerals is as follows:
[0016] 1. Concrete structure; 2. Adhesive layer; 3. First geomaterial layer; 4. Other geomaterial layers; 5. Mechanical anchoring components. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0018] The present invention will now be described in further detail with reference to the accompanying drawings:
[0019] like Figure 1 As shown, a concrete seepage-proof structure provided by this utility model includes: a concrete structure 1, an adhesive layer 2, a geomaterial layer, and a mechanical anchoring component 5.
[0020] The surface of the concrete structure 1 is covered with geotextile layers of a predetermined type, number of layers and sequence. Adhesive layers 2 are provided between the geotextile layers laid on the side surface of the concrete structure 1 and the concrete structure 1, as well as between the geotextile layers.
[0021] The mechanical anchoring component 5 fixes the geomaterial layer to the upper surface of the concrete structure 1.
[0022] In this embodiment, by uniformly and tightly adhering the geotextile layer on the concrete structure 1, there are no cavities between the geotextile and the concrete structure 1, especially on the sidewalls of the concrete structure 1. This does not damage the integrity of the geotextile, eliminates the need for intermediate fixing, avoids stress concentration, reduces the impact of the material's own weight on the seepage prevention material, and reduces friction between the material and the geotextile during operation, thus extending the service life of the seepage prevention structure.
[0023] In the above embodiments, preferably, the geomaterial layer includes a first geomaterial layer 3 and other geomaterial layers 4. The first geomaterial layer 3 is disposed on the upper surface and side surface of the concrete structure 1, and the other geomaterial layers 4 are disposed on the upper side and outer side of the first geomaterial layer 3. An adhesive layer 2 is disposed between the first geomaterial layer 3 and the side surface of the concrete structure 1, and an adhesive layer 2 is disposed between the other geomaterial layers 4 and the outer side of the first geomaterial layer 3.
[0024] In the above embodiments, preferably, the geomaterial layer is made of HDPE geomembrane or geotextile, the thickness of HDPE geomembrane is greater than or equal to 1.5 mm, HDPE geomembranes are connected by welding, and geotextiles are connected by sewing.
[0025] In the above embodiments, preferably, the adhesive layer 2 is formed by applying and solidifying a liquid adhesive melted at 150℃~180℃, with a coating amount of 1.1~1.25kg / m². 2 .
[0026] In the above embodiments, preferably, the mechanical anchoring component 5 includes expansion bolts and stainless steel pressure strips. The diameter of the expansion bolts is not less than 8 mm, the spacing between the expansion bolts is not greater than 0.5 m, and the thickness of the stainless steel pressure strip is not less than 4 mm and the width is not less than 9 cm.
[0027] like Figure 2 As shown, according to the concrete seepage prevention structure disclosed in the above embodiments, the specific steps in the implementation process are as follows:
[0028] S1: Inspection of the foundation layer of concrete structure 1: Inspect the surface quality of concrete structure 1 and clean it thoroughly.
[0029] S2: Geotechnical material testing: After inspecting the surface quality of the geotechnical material, cut it according to the geotechnical material laying diagram.
[0030] S3: Trial laying of geotextile materials: Lay the first layer of geotextile materials 3 according to the laying diagram and temporarily fix it.
[0031] S4: On-site heating of adhesive: Heat the finished adhesive on-site while stirring until the adhesive melts.
[0032] S5: Apply adhesive and bond geomaterials: Apply the melted adhesive liquid to the bonding surface of concrete structure 1, and immediately press the first geomaterial to be laid on the ground tightly and apply pressure until the geomaterial is fixed and the adhesive solidifies to form adhesive layer 2.
[0033] S6: Quality Inspection: The construction quality of the geotextile layer is inspected by visual inspection and manual tearing. Only if it passes the inspection can the next step be carried out; otherwise, S5 should be repeated.
[0034] S7: Lay the next layer of geotextile material for the seepage prevention structure until the last layer of geotextile material, repeating S3 to S6.
[0035] S8: Fixing the seepage-proof material: Fix all geotechnical material layers in the seepage-proof structure by means of mechanical anchoring component 5.
[0036] Furthermore, in step S1, the quality of concrete structure 1 should meet the design requirements, and problems such as grout leakage, honeycomb pitting, sanding, and loosening on the surface should be repaired, and its surface should be free of standing water, oil stains, dust and other impurities, and kept dry.
[0037] In step S2, the geomaterial layer should ensure that the geomaterial is free from damage, air bubbles, etc., and should be dry and free from impurities such as oil and dust.
[0038] In step S3, the geotextile layer is laid from top to bottom. It should be laid flat to avoid wrinkles, the allowance should be controlled to meet the specifications, and the geotextile should be temporarily fixed by weight.
[0039] In step S4, the adhesive is heated to a liquid state, with the temperature controlled between 150°C and 180°C. During heating, the liquid surface bubbles but does not emit smoke.
[0040] In step S5, a solid metal roller with a diameter ≥4cm is used to apply the adhesive liquid. The temperature is controlled between 150℃ and 180℃. The application rate is 1.1–1.25 kg / m². The application method is layered application, with each layer having a height ≤1m. When the temperature of the applied adhesive liquid drops below 80℃, the geotextile is pressed firmly onto the bonding surface of the concrete structure 1 until the adhesive solidifies.
[0041] In step S6, after 1 to 2 hours of construction, a comprehensive inspection is carried out. The geomaterial is visually inspected to ensure it is flat and bonded to the concrete structure 1, without any bulges or adhesive leakage. The geomaterial is also inspected by hand to confirm that it is not loose or torn, which is considered as qualified.
[0042] In step S7, geotextile material layers are laid one by one according to the seepage prevention structure. Each layer of geotextile material is implemented in accordance with S3 to S6 until the last layer of geotextile material.
[0043] In step S8, all geotechnical materials are fixed on the horizontal surface of concrete structure 1 by mechanical anchoring.
[0044] The above are merely preferred embodiments of this utility model and are 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 concrete seepage-proof structure, characterized in that, include: Concrete structure, adhesive layer, geotextile layer and mechanical anchoring components; The surface of the concrete structure is covered with geotextile layers of a predetermined type, number of layers and sequence. Adhesive layers are provided between the geotextile layers laid on the side surface of the concrete structure and the concrete structure, as well as between the geotextile layers. The mechanical anchoring assembly secures the geomaterial layer to the upper surface of the concrete structure.
2. The concrete seepage-proof structure according to claim 1, characterized in that, The geosynthetic material layer includes a first geosynthetic material layer and other geosynthetic material layers. The first geosynthetic material layer is disposed on the upper surface and side surface of the concrete structure. The other geosynthetic material layers are disposed on the upper side and outer side of the first geosynthetic material layer. The adhesive layer is disposed between the first geosynthetic material layer and the side surface of the concrete structure. The adhesive layer is disposed between the other geosynthetic material layers and the outer side of the first geosynthetic material layer.
3. The concrete seepage-proof structure according to claim 2, characterized in that, The geomaterial layer is made of HDPE geomembrane or geotextile. The thickness of the HDPE geomembrane is greater than or equal to 1.5 mm. The HDPE geomembranes are connected by welding, and the geotextiles are connected by sewing.
4. The concrete seepage-proof structure according to claim 2, characterized in that, The adhesive layer is formed by applying and solidifying a liquid adhesive melted at 150℃~180℃, with a coating amount of 1.1~1.25kg / m². 2 .
5. The concrete seepage-proof structure according to claim 2, characterized in that, The mechanical anchoring assembly includes expansion bolts and stainless steel pressure strips. The diameter of the expansion bolts is not less than 8 mm, the spacing between the expansion bolts is not greater than 0.5 m, and the thickness of the stainless steel pressure strip is not less than 4 mm and the width is not less than 9 cm.