Waterproof method for cable trench well

Abstract

The invention relates to the technical field of cable trench waterproofing, in particular to a waterproof method for a cable trench well, which comprises the following steps: crack inspection: inspecting the cracking condition and the cracking area of a cable trench; the crack type, the crack width and length, the crack position, the crack direction, the crack depth, the crack activity, the water permeation, the surrounding environment, the repair history and the overall structure evaluation are determined; crack treatment, wherein cracks are cleaned, and obstacles are removed for follow-up work; drilling treatment is conducted, specifically, grouting holes are formed through proper drill holes and drill bits; according to the construction method, a hydrophobic layer is formed in the building, damage cannot be caused in the construction process, the hydrophobic layer is formed between the outer wall of the cable trench and the soil covering layer, the hydrophobic layer can prevent external accumulated water from seeping inwards along cracks, and plugging of a water leakage source is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of power cable trench waterproofing, and in particular to a waterproofing method for a cable trench. Background Art

[0002] When the cable trench in the power distribution room is close to the outdoors and in areas with high groundwater levels, water is easily seeping into the trench, so civil engineering should take measures to prevent water seepage. In addition, if the pipe opening and its surroundings are not tightly sealed at the place where the cable pipeline passes through the wall foundation, outdoor groundwater is easy to flow into the trench from the pipe opening. The bottom of the trench should have a certain slope, so that when water enters the trench, it can flow to one end and try to be discharged. In the cable trench that is often prone to water inflow, a sump should be made if necessary to pump out the water.

[0003] The existing cable trench waterproofing technology commonly used methods include waterproof membrane layer, waterproof coating and sealing layer, injection method and waterproof concrete (concrete) and mortar. Among them, waterproof concrete (concrete) and mortar use concrete and mortar treated with waterproof additives to construct the main structure of the cable trench. They can only be used during construction and cannot repair the wall surface where leakage occurs; waterproof membrane layer, waterproof coating and sealing layer and injection method are all for leak-proof treatment of the wall surface after leakage, and cannot block the source of the leakage. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a waterproofing method for cable trenches, which forms a hydrophobic layer between the outer wall of the cable trench and the covering layer. The hydrophobic layer can prevent external accumulated water from seeping inward along the cracks, thereby sealing the source of the leakage.

[0005] The present invention provides the following technical solutions:

[0006] A waterproofing method for a cable trench comprises the following steps:

[0007] Crack inspection: Check the cracking condition and cracking area of ​​the cable trench, determine the crack type, crack width and length, crack location, crack direction, crack depth, crack activity, water penetration, surrounding environment, repair history, and overall structural assessment;

[0008] Crack treatment: clean the cracks to clear obstacles for subsequent work;

[0009] Drilling: Use appropriate drill and drill bit to form grouting holes;

[0010] Grouting fixation: Use appropriate grouting equipment to complete the construction.

[0011] Further, the crack inspection comprises the following steps:

[0012] Determine the type of crack;

[0013] Determine the width and length of the crack;

[0014] Determine the location of the crack;

[0015] Determine the direction of the crack;

[0016] Determine the depth of the crack;

[0017] Determine whether the crack is changing dynamically;

[0018] Check for water seepage;

[0019] Assess environmental conditions near the crack;

[0020] Collect and analyze previous repair records and methods for crack areas;

[0021] Review the crack inspection process.

[0022] Furthermore, the crack types include surface cracks and structural cracks.

[0023] Furthermore, the crack treatment comprises the following steps:

[0024] Remove loose material;

[0025] widen the cracks;

[0026] Cleaning cracks;

[0027] Dry cracks;

[0028] Back cover processing;

[0029] Filling cracks;

[0030] Crack surface finishing;

[0031] Review the crack treatment process.

[0032] Furthermore, in the step of cleaning the cracks, if there is mold in the cracks, a fungicide is used to disinfect the cracks.

[0033] Furthermore, the punching process comprises the following steps:

[0034] Select the punch hole location:

[0035] Assess the punch area;

[0036] Select the punching equipment;

[0037] Mark the punch points;

[0038] Drill and punch holes step by step;

[0039] Monitor and detect the punching process in real time.

[0040] Furthermore, the grouting fixation includes the following contents:

[0041] Install the grouting nozzle;

[0042] Mixing grouting agent;

[0043] Grouting;

[0044] Clean the grouting nozzle.

[0045] Furthermore, the grouting nozzle is a check valve.

[0046] Furthermore, during the grouting operation, a single-tube grouting pump is used.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] 1. The present invention forms a hydrophobic layer between the outer wall of the cable trench and the covering soil layer, and the hydrophobic layer can prevent external accumulated water from seeping inward along the cracks, that is, the source of water leakage is blocked.

[0049] 2. Construction is often required inside the cable trench, and the diaphragm produced on the surface of the cable trench by the prior art may be damaged during the construction process, causing it to lose its waterproof effect. However, the present invention forms a hydrophobic layer inside the building and will not cause damage during construction.

[0050] 3. This invention designs a hydrophobic layer between the outer wall of the cable trench and the soil covering layer. This hydrophobic layer has a high waterproof effect and can effectively prevent external moisture from penetrating along the cracks. This design optimizes the simple waterproof coating or sealing tape commonly used in the prior art and provides a more reliable and durable waterproof solution.

[0051] 4. Through a comprehensive inspection of cracks, including detailed assessment of type, width, length, location, direction and depth, this solution can more accurately identify and repair potential risk points in cable trenches. This systematic and detailed treatment method goes beyond the traditional simple repair or temporary plugging method.

[0052] 5. The design of the grouting nozzle and the application of the grouting technology of the present invention are adjusted according to the specific conditions of the cracks. This precise adjustment allows the grouting agent to fill the cracks more effectively, ensuring long-term sealing and enhancing structural stability.

[0053] 6. The design of the grouting nozzle and its fixing technology of the present invention are optimized for the specific conditions of the cable trench, and through the internal expansion compaction technology and the use of epoxy resin or other adhesives, efficient and leak-free installation is ensured. This method provides strong fixation while avoiding the additional structural damage that may be caused by traditional drilling.

[0054] 7. The grouting process of the present invention takes into account the need for precise adjustment according to the crack characteristics, including the grouting time and the expansion degree of the slurry. This precise control is in contrast to the existing widely used simple pressure injection method, which can more effectively cope with complex and changing field conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 is a flow chart of the present invention;

[0056] Figure 2 This is a schematic diagram of water seepage in cable trenches and wells;

[0057] Figure 3 is a schematic diagram of the present invention;

[0058] Figure 4 is a schematic diagram of a fixed grouting nozzle;

[0059] Figure 5 is a schematic diagram of grouting;

[0060] Figure 6 Data analysis diagram for selecting the punching method;

[0061] Figure 7 Data analysis diagram for selecting blocking methods;

[0062] Figure 8 A curve diagram for selecting a plugging method;

[0063] Fig. 9 This is the analysis diagram of the hole plugging test;

[0064] Fig.10 It is a bar graph of the slurry overlap test;

[0065] Fig.11 This is the data analysis diagram for the grouting pressure test;

[0066] Fig.12 This is the data analysis diagram of the average grouting depth;

[0067] Fig.13 It is the curve diagram of grouting pressure test;

[0068] Fig.14 This is the data analysis diagram of the grouting pressure test. DETAILED DESCRIPTION

[0069] The present invention is mainly used for buildings with a certain depth, such as cable trenches, substation drainage ditches, and distribution station drainage ditches. Compared with existing waterproofing methods, the hydrophobic layer formed by the present invention can prevent external accumulated water from seeping inward along cracks, thereby sealing the source of leakage. Moreover, construction is often required inside the cable trench, and the diaphragm produced on the surface of the cable trench by the prior art may be damaged during the construction process, causing it to lose its waterproof effect. However, the present invention forms a hydrophobic layer inside the building, which will not cause damage during construction.

[0070] See also Figure 1-Figure 14 The waterproof method for a cable trench of this embodiment comprises the following steps:

[0071] Crack inspection: Check the cracking condition and cracking area of ​​the cable trench, determine the crack type, crack width and length, crack location, crack direction, crack depth, crack activity, water penetration, surrounding environment, repair history, and overall structural assessment;

[0072] Determine the type of crack;

[0073] Determine the width and length of the crack;

[0074] Assess the width of the cracks, as wider cracks may indicate a greater impact on the structure; measure the length of the cracks to understand their ductility and possible expansion trends.

[0075] Determine the location of the crack;

[0076] Accurately determine the location of cracks and assess the extent of their impact on the overall structure and waterproofing layer.

[0077] Determine the direction of the crack;

[0078] Analyzing the direction of the cracks can reveal what caused them, for example, vertical cracks may be caused by foundation settlement, and horizontal cracks may be caused by excessive loads above the wall;

[0079] Determine the depth of the crack;

[0080] Measure the depth of cracks using appropriate tools to assess the impact inside the structure;

[0081] Determine whether the crack is changing dynamically;

[0082] Determining whether the crack is changing dynamically, such as whether there is continuous expansion or closure, can be achieved by installing displacement meters on the crack or by regular observation;

[0083] Through a comprehensive inspection of cracks, including detailed assessment of type, width, length, location, direction and depth, this solution can more accurately identify and repair potential risk points in cable trenches. This systematic and detailed treatment method goes beyond the traditional simple patching or temporary plugging methods.

[0084] Check for water seepage;

[0085] Check cracks for water penetration to determine the effectiveness of the waterproofing layer;

[0086] Assess environmental conditions near the crack;

[0087] Environmental conditions such as humidity, temperature changes, and chemical corrosion can affect the behavior of cracks;

[0088] Collect and analyze previous repair records and methods for crack areas;

[0089] Collect and analyze previous repair records and methods in the crack area to understand whether previous treatment measures were successful and their impact on the existing conditions;

[0090] Review the crack inspection process;

[0091] Consider the inspection and analysis of cracks in the context of the overall structure and assess whether there are other potential problems;

[0092] Crack treatment: clean the cracks to clear obstacles for subsequent work;

[0093] Remove loose material;

[0094] That is, clean the inside of the crack, using a brush, air compressor or vacuum cleaner to remove dust, gravel, sand and other loose materials from the crack;

[0095] widen the cracks;

[0096] Use a graver or angle grinder (for larger or deeper cracks) to gently expand the crack opening for better filling and sealing;

[0097] Cleaning cracks;

[0098] Wash the inside of the crack thoroughly with clean water or an appropriate detergent to remove grease and other contaminants;

[0099] Dry cracks;

[0100] Ventilate and dry to ensure that the cracks are completely dry. Repair work in wet or humid conditions will affect the bonding and sealing effect of the material;

[0101] Back cover processing;

[0102] For some deep or wide cracks, it may be necessary to fill with sealing materials (such as foam glue) to prevent the filling material from sinking or leaking through the cracks;

[0103] Filling cracks;

[0104] According to the type of crack and the expected waterproofing requirements, select appropriate filling materials (such as epoxy resin, polyurethane foam, etc.), and use special tools (such as injection guns) to evenly inject the filling materials into the cracks to ensure that there are no gaps;

[0105] Crack surface finishing;

[0106] Before the filling material solidifies, use a scraper or other tool to level the surface to ensure a natural and smooth transition between the crack and the surrounding surface;

[0107] Review the crack treatment process;

[0108] Through the above steps, cracks can be effectively cleaned and repaired, laying a solid foundation for the effective construction of the waterproof layer. Correct crack treatment not only improves the waterproof performance of the structure, but also extends the life of the cable trench;

[0109] Drilling: Use appropriate drill and drill bit to form grouting holes;

[0110] Select the punch hole location:

[0111] According to the expansion coefficient of the hydrophobic layer filler and the load bearing capacity and waterproof performance of the structure, the best location for drilling holes is accurately determined;

[0112] Assess the punch area;

[0113] Evaluate the structural characteristics and internal components of the planned cable trench drilling area, such as steel bars, wires, pipes, etc.

[0114] Select the punching equipment;

[0115] Choose appropriate drilling equipment and drill bits according to the material and size of the hole, such as electric hammer, drilling press, etc.;

[0116] Mark the punch points;

[0117] Use a marker pen to mark the exact location to ensure the accuracy of the punching position;

[0118] Drill and punch holes step by step;

[0119] Drill holes gradually according to the predetermined depth and width to avoid drilling too deep at one time and causing structural damage;

[0120] Real-time monitoring and detection of the punching process;

[0121] During the drilling process, pay attention to the progress of drilling and possible problems, and adjust the operation mode in time;

[0122] Grouting fixation: Use appropriate grouting equipment to complete the construction;

[0123] Install the grouting nozzle;

[0124] Insert the grouting nozzle into the pre-drilled hole, make sure the nozzle is firmly installed, you can use some glue or epoxy resin to fix it, and use a special tool to rotate the grouting nozzle to expand and compact the inner wall of the hole to ensure a leak-free seal, especially between the nozzle body and the hole wall;

[0125] The design of the grouting nozzle and the application of the grouting technology are adjusted according to the specific conditions of the crack. This precise adjustment allows the grouting agent to fill the crack more effectively, ensuring long-term sealing and enhancing structural stability. This provides higher repair quality and durability compared to the conventional one-size-fits-all (standardized grouting) method. The design of the grouting nozzle and its fixing technology are optimized for the specific conditions of the cable trench, ensuring efficient and leak-free installation through internal expansion compaction technology and the use of epoxy resin or other adhesives. This method avoids the additional structural damage that may be caused by traditional drilling while providing a strong fixation.

[0126] Mixing grouting agent;

[0127] According to the evaluation of the cracks, the expansion time and size of the grouting agent are determined, and the grouting agent is adjusted; the grouting liquid adopts a bio-chemical synergistic repair mechanism: that is, the microbial mineralization is used to generate a calcium carbonate skeleton with self-repair function inside the crack, and the intelligent expansion characteristics of the shape memory polymer material are combined to form a composite repair body of "rigid skeleton + flexible filling". In the crack treatment stage, first inject an alkaline activation solution with a pH of 9.5 (containing 0.1 mol of ammonium chloride), and maintain the ambient temperature at 28± degrees Celsius and a relative humidity of 80%±5% for 48 hours. The calcite crystals induced by microorganisms have a layered stacking structure with a compressive strength of more than 35MPa. The microbial repair agent contains: Bacillus pasteurianus spores (concentration of 1×10 8 CFU / mL); urea (concentration of 3 mol / L); calcium chloride (concentration of 0.5 mol / L); nutrient matrix (peptone 5 g / L, yeast extract 2 g / L); sustained-release carrier (sodium alginate microcapsule particle size 200-400 μm)

[0128] Grouting;

[0129] Use a booster pump to extract a special filling squeeze, and inject grout according to the set time based on the crack assessment;

[0130] The grouting process takes into account the need for precise adjustment according to the characteristics of the cracks, including the grouting time and the expansion degree of the grout. This precise control is in contrast to the existing widely used simple pressure injection method, which can more effectively cope with complex and changing field conditions.

[0131] The method of using gradient waterproof structure during grouting: that is, by controlling the grouting pressure curve to form three stages of 0.3MPa→1.2MPa→0.8MPa, the hydrophobic layer presents a super-hydrophobic property with a surface contact angle greater than 150 degrees, and the inner layer forms a gradual permeability gradient (10 -14 →10 -12 square meters), achieving the synergy of active drainage and passive waterproofing.

[0132] Clean the grouting nozzle;

[0133] Use a portable cutter to cut off the grouting nozzle, grind the surface, and fill it with appropriate cement or glue.

[0134] Furthermore, crack types include surface cracks and structural cracks.

[0135] Surface cracks are usually caused by external forces or internal stress; structural cracks are usually wider and have a certain depth. Structural cracks may affect the structural safety of the cable trench and are more dangerous.

[0136] Furthermore, in the step of cleaning the cracks, if there is mold in the cracks, a fungicide is used to disinfect the cracks.

[0137] Furthermore, the grouting nozzle is a check valve.

[0138] according to Figure 7-Figure 9 The experiment concluded that a check valve should be used for the grouting nozzle.

[0139] Furthermore, during the grouting operation, a single-tube grouting pump is used.

[0140] according to Figure 10-Figure 14 The experiment concluded that a single-tube grouting pump should be used during grouting operations.

[0141] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A waterproofing method for a cable trench, characterized in that: The following steps are involved: Crack inspection: Check the cracking condition and cracking area of ​​the cable trench, determine the crack type, crack width and length, crack location, crack direction, crack depth, crack activity, water penetration, surrounding environment, repair history, and overall structural assessment; Crack treatment: clean the cracks to clear obstacles for subsequent work; Drilling: Use appropriate drill holes and drill bits to form grouting holes that penetrate the outer wall of the cable trench; Grouting fixation: Use appropriate grouting equipment to inject grout between the cable trench and the covering layer to form a hydrophobic layer.

2. A waterproofing method for a cable trench according to claim 1, characterized in that: The crack inspection comprises the following steps: Determine the type of crack; Determine the width and length of the crack; Determine the location of the crack; Determine the direction of the crack; Determine the depth of the crack; Determine whether the crack is changing dynamically; Check for water seepage; Assess environmental conditions near the crack; Collect and analyze previous repair records and methods for crack areas; Review the crack inspection process.

3. A waterproof method for cable trenches according to claim 2, characterized in that: The crack types include surface cracks and structural cracks.

4. A waterproofing method for a cable trench according to claim 1, characterized in that: The crack treatment comprises the following steps: Remove loose material; widen the cracks; Cleaning cracks; Dry cracks; Back cover processing; Filling cracks; Crack surface finishing; Review the crack treatment process.

5. A waterproofing method for cable trenches according to claim 4, characterized in that: In the step of cleaning the cracks, if there is mold in the cracks, a fungicide is used to disinfect the cracks.

6. A waterproofing method for a cable trench according to claim 1, characterized in that: The punching process comprises the following steps: Select the punch hole location: Assess the punch area; Select the punching equipment; Mark the punch points; Drill holes gradually until they penetrate the outer wall of the cable trench; Monitor and detect the punching process in real time.

7. A waterproofing method for a cable trench according to claim 1, characterized in that: The grouting fixation includes the following contents: Install the grouting nozzle; Mixing grouting agent; Grouting between the cable trench and the covering soil; Clean the grouting nozzle.

8. A waterproofing method for a cable trench according to claim 7, characterized in that: The grouting nozzle is a check valve.

9. A waterproofing method for a cable trench according to claim 7, characterized in that: During the grouting operation, a single-tube grouting pump is used.

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