Construction method for water stopping and leaking stoppage of civil air defense project

Abstract

The invention provides a construction method for water stopping and leaking stoppage of civil air defense engineering. The construction method comprises the following steps that S1, a base plane of a water leakage area is treated; s2, grouting holes are drilled in the water leakage area, and grouting needle heads are inserted into the grouting holes; s3, slurry is injected into the grouting needle head through a grouting machine; and S4, the grouting needle head is taken down, and concrete is pressed and plastered in the water leakage area. By means of the method, grouting can be conducted on the water seepage crack, concrete plugging is adopted, the plugging and seepage-proofing effects of the civil air defense construction wall are improved, construction is convenient, and the cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and more specifically, to a construction method for stopping water and plugging leaks in civil air defense projects. Background Art

[0002] In the construction process of underground projects, the design and construction of engineering waterproofing has become an important part of the entire project construction, and has attracted great attention from the design, construction and construction units. Civil air defense projects are built below the surface in areas with high groundwater levels. Each civil air defense project is like a boat, soaked in groundwater all year round and affected by groundwater pressure. Water leakage in civil air defense projects has become a common problem in civil air defense projects. During the flood season, the groundwater level may rise rapidly in an instant, and the strong water pressure will not let go of any weak waterproof parts in the structure. Once there is water leakage, it will not only affect normal use, but also endanger the safety of command, communication, power generation and other equipment, and even endanger the structural safety of civil air defense projects.

[0003] Basement leakage generally occurs in the form of local leakage. Due to different geology, functions, designs and constructions of basements, the leakage locations and forms vary.

[0004] The traditional water-stopping and leak-proofing construction methods for civil air defense projects still have the following problems:

[0005] 1. Civil air defense projects are mostly high-pressure seepage water, and traditional plugging and waterproofing construction is very difficult;

[0006] 2. Traditional grouting and waterproofing construction is prone to secondary leakage;

[0007] 3. Traditionally, ordinary cement mortar sealing treatment for civil air defense projects has insufficient adhesion, is prone to cracking, and is prone to water leakage;

[0008] 4. When the structural concrete is large in area, due to improper measures, the excessive temperature rise and fall of the concrete caused by the heat of cement hydration will cause concrete cracks;

[0009] 5. Traditionally, civil air defense projects create water channels at construction joints, which makes it difficult to stop water leaks in one go, and also causes a waste of manpower and material resources. Summary of the invention

[0010] In view of the above problems, the purpose of the present invention is to provide a construction method for water stopping and leak plugging in civil air defense projects, which improves the leak plugging and anti-seepage effect of the walls of civil air defense projects by grouting at the seepage cracks and sealing them with concrete, and the construction is convenient and low-cost.

[0011] The invention provides a construction method for stopping water leakage in civil air defense projects, comprising the following steps:

[0012] S1: Treat the base surface of the leaking area;

[0013] S2: drilling a grouting hole in the water leakage area, and inserting a grouting needle into the grouting hole;

[0014] S3: injecting slurry into the grouting needle using a grouting machine;

[0015] S4: Remove the grouting needle and apply concrete to the leaking area.

[0016] In the step S1, the base surface of the leaking area is processed, including: checking whether the main structure of the leaking area is firmly bonded to the decorative layer on its surface, and if not, removing the decorative layer.

[0017] In the step S2, grouting holes are drilled in the water leakage area, including: using an electric hammer to drill grouting holes on the water seepage cracks on the surface of the water leakage area, determining the number of the grouting holes according to the length of the water seepage cracks, determining the depth of the grouting holes according to the depth of the water seepage cracks, determining the angle of the grouting holes according to the angle between the water seepage cracks and the surface of the water leakage area, and determining the inner diameter of the grouting holes according to the width of the water seepage cracks; the outer diameter of the grouting needle is adapted to the inner diameter of the grouting hole.

[0018] In the step S3, a grouting machine is used to inject slurry into the grouting needle, including: after the slurry enters the grouting needle, the water seepage crack is observed, and if there is no water seepage, the injection of slurry is stopped.

[0019] In the step S3, a grouting machine is used to inject slurry into the grouting needle, including: using pressure grouting to inject the slurry into the grouting needle.

[0020] In the step S4, the grouting needle is removed, and concrete is applied to the leaking area, including: cleaning the surface scum of the leaking area after the slurry is injected and sprinkling water, applying concrete and curing.

[0021] The concrete is high-ductility concrete, and the thickness of the high-ductility concrete is not greater than 2 cm.

[0022] The percentages of cement, mineral powder, river sand, expansion agent, admixture, fiber and water in the high-ductility concrete are 50%, 35%, 15%, 0.04%, 0.002%, 0.8% and 23% respectively.

[0023] If the main structure of the leaking area is a brick-concrete structure, the main structure is reinforced before step S1.

[0024] After step S4, the method further includes spraying polyurea on the upper part of the concrete.

[0025] From the above description, it can be seen that the construction method for water-stopping and plugging of civil air defense projects provided by the present invention is to inject grout into the water-seepage cracks through the drilling holes in the water-leaking area, and then press concrete on the surface of the water-leaking area to seal the cracks, thereby further sealing the cracks. The present invention is convenient and fast to construct, has low construction cost, strong durability after construction, good impermeability, and good anti-cracking effect, so that the waterproof performance of the basement civil air defense is greatly improved, and the waterproof service life is long.

[0026] In order to achieve the above and related purposes, one or more aspects of the present invention include features that will be described in detail later and are particularly pointed out in the claims. The following description and the accompanying drawings describe some exemplary aspects of the present invention in detail. However, these aspects indicate only some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all of these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easy to understand. In the accompanying drawings:

[0028] Figure 1 It is a flow chart of a construction method for stopping water leakage in civil air defense projects according to an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of the structure of water stopping and leak plugging for civil air defense projects according to an embodiment of the present invention;

[0030] Among them, 1-grouting hole, 2-concrete;

[0031] The same reference numerals throughout the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0032] In the following description, for the purpose of illustration, in order to provide a comprehensive understanding of one or more embodiments, many specific details are set forth. However, it is apparent that these embodiments may also be implemented without these specific details. In other examples, for ease of describing one or more embodiments, known structures and devices are shown in the form of block diagrams.

[0033] The present invention can be subjected to various changes and can have various embodiments, and specific embodiments are illustrated and described in the accompanying drawings. However, the present invention is not limited to the specific implementation, and all changes, equivalents and substitutes falling within the concept and technical scope of the present invention are included, and should be understood to be included.

[0034] Ordinal terms such as first, second, etc. may be used to describe various constituent elements, but the constituent elements are not limited to the terms. The terms are only used to distinguish one constituent element from another constituent element. For example, without departing from the scope of the claims of the present invention, the second constituent element may be named as the first constituent element, and similarly, the first constituent element may be named as the second constituent element. The terms and / or include a combination of multiple associated items or a certain item among multiple associated items.

[0035] It should be understood that when a certain component is mentioned to be "connected" or "contacted" with other components, this includes not only the case where it is directly connected or contacted with other components, but also the case where other components exist in between. Conversely, when a certain component is mentioned to be "directly connected" or "directly contacted" with other components, it should be understood that there are no other components in between.

[0036] In the description of the embodiments, when it is described that a certain component is formed "on or under" another component, on or under includes two components directly contacting each other or at least one other component is arranged and formed between the two components. Moreover, when it is expressed as on or under, it refers to not only the upper direction but also the lower direction based on a certain component.

[0037] The terms used in this application are only used to illustrate specific embodiments and are not intended to limit the present invention. Unless the context clearly provides otherwise, singular expressions include plural expressions. In this application, it should be understood that terms such as "including" or "having" are used to specify the presence of features, numbers, steps, operations, constituent elements, parts or combinations thereof recorded in the specification, and do not preclude the presence or additional possibility of one or more other features, numbers, steps, operations, constituent elements, parts or combinations thereof.

[0038] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as those generally understood by those skilled in the art. Terms defined in commonly used dictionaries should be interpreted as having the same meaning as in the context of the relevant technology, and if not clearly defined in this application, they should not be interpreted as ideal or overly formal meanings.

[0039] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] Figure 1 It is a flow chart of a construction method for stopping water leakage in civil air defense projects according to an embodiment of the present invention; Figure 2A schematic diagram of the structure of water stopping and leak plugging for civil air defense projects according to an embodiment of the present invention;

[0041] like Figure 1 and Figure 2 As shown, the construction method for water stopping and plugging leaks in civil air defense projects proposed in this embodiment can be used to stop water seepage and leaks in the walls, floors and ceilings of civil air defense projects, and can also be used to stop cracks, water seepage, and leaks in walls, floors and ceilings in other construction occasions.

[0042] The construction method of water stopping and leak plugging of my fire prevention project includes the following steps:

[0043] S1: Treat the base surface of the leaking area.

[0044] Civil air defense projects are underground projects. When water seepage occurs, plugging construction is usually carried out inside the project. During construction, the surface of the leaking area should be checked first. Some surfaces are loose due to excessive water seepage, and some are not firm due to long-term use. In order to facilitate the plugging construction, the surface is first treated with a base surface to expose the main structure, which is also convenient for observing the water seepage situation.

[0045] In a specific embodiment of the present invention, processing the base surface of the leaking area may include: checking whether the main structure of the leaking area is firmly bonded to the plaster layer or decorative layer on its surface; if not, removing the plaster layer or decorative layer.

[0046] The plaster layer or decorative layer may become loose due to water immersion. If it becomes loose, remove the surface plaster layer or decorative layer to expose the base layer of the main structure, so as to observe the water seepage cracks and water seepage amount, and also to observe the effect during the construction process.

[0047] S2: Drill a grouting hole 1 in the leaking area and insert a grouting needle into the grouting hole 1.

[0048] In order to facilitate grouting and plugging, a grouting hole 1 is drilled at an appropriate position in the leaking area. The grouting hole 1 should be connected to the water seepage crack. The slurry is injected from the grouting hole 1, and the slurry diffuses into the water seepage crack from the grouting hole 1. In order to facilitate grouting, a grouting needle is inserted into the grouting hole 1, and the slurry is injected from the grouting needle.

[0049] In a specific embodiment of the present invention, the grouting hole 1 may be drilled by using an electric hammer to drill the grouting hole 1 on the water seepage cracks on the surface of the water leakage area.

[0050] The number of grouting holes 1 can be determined according to the length of the seepage crack, the depth of the grouting hole 1 can be determined according to the depth of the seepage crack, the angle of the grouting hole 1 can be determined according to the angle between the seepage crack and the surface of the leakage area, and the inner diameter of the grouting hole 1 can be determined according to the width of the seepage crack.

[0051] The grouting holes 1 are located on the water seepage cracks so that the slurry can diffuse into the water seepage cracks and fill the water seepage cracks. If the water seepage cracks are long, a grouting hole 1 can be drilled every 50 cm along the water seepage cracks to facilitate the full diffusion and filling of the slurry; if the water seepage cracks are short, within 50 cm, a grouting hole 1 can be drilled in the middle of the water seepage cracks.

[0052] The depth of the seepage crack can be measured by a concrete crack depth detector, and the depth of the grouting hole 1 can be slightly deeper than the depth of the seepage crack. The angle between the seepage crack and the surface of the leaking area can be measured by a concrete crack detector, and the drilling trend of the grouting hole 1 should be the same as the trend of the seepage crack in the wall. The width of the seepage crack can be determined by the width observed on the base surface, and the inner diameter of the grouting hole 1 is similar to this width. Accurate grouting holes 1 can save labor, materials and time for grouting.

[0053] Select a grouting needle with an outer diameter that matches the inner diameter of the grouting hole 1.

[0054] S3: Use a grouting machine to inject slurry into the grouting needle.

[0055] After the grouting needle is installed, start grouting. The grouting machine can be connected to the grouting needle for direct grouting. The grouting pressure of the grouting machine can make the slurry directly enter the grouting needle and fully diffuse into the seepage cracks before the slurry solidifies. The construction is fast and convenient. The solidification time after the slurry is injected can be set to more than 2 minutes, which is enough for the slurry to diffuse into the seepage cracks.

[0056] In a specific embodiment of the present invention, after the slurry enters the grouting needle, the water seepage cracks can be observed, and if there is no water seepage, the slurry injection is stopped. The slurry can block and stop water, and if there is no obvious water at the water seepage cracks, it means that the plugging has been completed, and the slurry injection can be stopped.

[0057] Furthermore, if the grouting needle cannot inject slurry, it means that the water seepage cracks are already full of slurry and you can stop injecting slurry.

[0058] Sometimes the grouting needle is far away from the grouting machine and needs to be connected by a pipe. In a specific embodiment of the present invention, pressure grouting is used to inject slurry into the grouting needle.

[0059] In order to prevent the slurry from solidifying in the pipe or grouting hole due to the long delivery time and being unable to spread, the grouting time should be accelerated. The way to accelerate the grouting time is to use the pressure grouting method to make the slurry quickly enter the grouting needle. Pressure grouting is to use a grouting pump to pressurize the slurry to the required part and perform grouting under a certain pressure. By adjusting the pressure of the grouting pump, the grouting speed is controlled, which also facilitates the slurry to quickly spread into the seepage cracks. In this embodiment, the grouting pump can be connected between the grouting needle and the grouting machine.

[0060] When grouting, pay attention to the position of the grouting needle to prevent explosion, bubbling, overflow, etc., and observe whether the grouting machine is working normally.

[0061] S4: Remove the grouting needle and apply concrete 2 to the leaking area.

[0062] After the grouting is completed, concrete 2 is pressed on the base surface to further seal it so as to restore the decorative layer.

[0063] In a specific embodiment of the present invention, the surface scum of the leaking area after grouting is cleaned and water is sprinkled to prevent surface cracking, and the concrete 2 is pressed and cured. The concrete 2 can prevent the base layer from cracking after grouting.

[0064] In a specific embodiment of the present invention, the concrete 2 is high-ductility concrete, and the thickness of the concrete 2 is not greater than 2 cm.

[0065] High ductility concrete is a cement-based composite material with high strength, high impermeability, high crack resistance and high durability. It can be made by mixing cement, mineral powder, river sand, expansion agent, admixture, fiber and water. The use of high ductility concrete greatly reduces the use of materials and reduces the sealing thickness compared to ordinary cement mortar.

[0066] In a specific embodiment of the present invention, the percentages of cement, mineral powder, river sand, expansion agent, admixture, fiber and water in high ductility concrete can be 50%, 35%, 15%, 0.04%, 0.002%, 0.8% and 23% respectively. The high ductility concrete after the above proportions has the characteristics of excellent workability and easy mixing on site, and has a low production cost. The volume content of the added fiber does not exceed 2%, but the ultimate tensile strain capacity reaches more than 1%, and it has good crack resistance and impermeability. Compared with ordinary cement mortar, the waterproofness of civil air defense projects has been greatly improved. High ductility concrete has the advantages of being beautiful and requiring no decoration, which reduces costs.

[0067] The injected slurry is also high-ductility concrete, which can successfully seal the hole in one go and reduce rework.

[0068] In a specific embodiment of the present invention, if the main structure of the leaking area is a brick-concrete structure, the main structure is reinforced before step S1.

[0069] First, check the strength of the main structure. Early civil air defense projects were mostly brick-concrete structures with generally poor strength. They may not be able to contain the grout or may be partially stretched open under the grouting pressure. In this case, the main structure should generally be reinforced first, and then grouting can be performed when the main structure reaches a certain strength. The reinforcement method can be to increase the cross-section reinforcement method, to stick carbon fiber cloth reinforcement method, or to stick steel plate (steel) reinforcement method.

[0070] In a specific embodiment of the present invention, polyurea can also be sprayed on the upper part of the concrete 2, and the thickness of the polyurea can be 1.5 mm. The polyurea waterproof coating has good weather resistance and can maintain stable performance under extreme climatic conditions; it has good chemical resistance and can resist corrosion by chemical substances such as acid, alkali, and salt; it has good wear resistance and can resist mechanical wear and friction. Spraying polyurea can ensure the use function and service life of the basement air defense project and improve the overall strength of the material.

[0071] The construction method for stopping water and plugging leaks in civil air defense projects according to the present invention is described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various improvements can be made to the construction method for stopping water and plugging leaks in civil air defense projects proposed by the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the attached claims.

Claims

1. A construction method for stopping water leakage in civil air defense projects, characterized in that: The following steps are involved: S1: Treat the base surface of the leaking area; S2: drilling a grouting hole in the water leakage area, and inserting a grouting needle into the grouting hole; S3: injecting slurry into the grouting hole through the grouting needle using a grouting machine; S4: Remove the grouting needle and apply concrete to the leaking area.

2. The construction method for stopping water leakage in civil air defense projects as claimed in claim 1, characterized in that: In the step S1, the base surface of the leaking area is processed, including: Check whether the main structure of the leaking area is firmly bonded to the decorative layer on its surface. If not, remove the decorative layer.

3. The construction method for stopping water leakage in civil air defense projects according to claim 1, characterized in that: In the step S2, drilling grouting holes in the water leakage area includes: Grouting holes are drilled on the water seepage cracks on the surface of the leaking area using an electric hammer. Determine the number of the grouting holes according to the length of the water seepage crack, determine the depth of the grouting holes according to the depth of the water seepage crack, determine the angle of the grouting holes according to the angle between the water seepage crack and the surface of the water leakage area, and determine the inner diameter of the grouting holes according to the width of the water seepage crack; The outer diameter of the grouting needle is matched with the inner diameter of the grouting hole.

4. The construction method for stopping water leakage in civil air defense projects according to claim 1, characterized in that: In the step S3, a grouting machine is used to inject slurry into the grouting hole through the grouting needle, comprising: After the slurry enters the grouting hole through the grouting needle, the water seepage cracks are observed, and if there is no water seepage, the injection of slurry is stopped.

5. The construction method for stopping water leakage in civil air defense projects as claimed in claim 1, characterized in that: In the step S3, a grouting machine is used to inject slurry into the grouting hole through the grouting needle, comprising: The slurry is injected into the grouting hole through the grouting needle by pressure grouting.

6. The construction method for stopping water leakage in civil air defense projects according to claim 1, characterized in that: In the step S4, the grouting needle is removed and concrete is applied to the leaking area, including: After the slurry is injected, the surface scum of the leaking area is cleaned and water is sprinkled, and the concrete is pressed and cured.

7. The construction method for stopping water leakage in civil air defense projects as claimed in claim 1, characterized in that: The concrete and the slurry are both high-ductility concrete, and the thickness of the concrete is no more than 2 cm.

8. The construction method for stopping water leakage in civil air defense projects as claimed in claim 7, characterized in that: The percentages of cement, mineral powder, river sand, expansion agent, admixture, fiber and water in the high-ductility concrete are 50%, 35%, 15%, 0.04%, 0.002%, 0.8% and 23% respectively.

9. The construction method for stopping water leakage in civil air defense projects as claimed in claim 1, characterized in that: If the main structure of the leaking area is a brick-concrete structure, the main structure is reinforced before step S1.

10. The construction method for stopping water leakage in civil air defense projects according to claim 1, characterized in that: After step S4, the method further includes spraying polyurea on the upper part of the concrete.

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