HwaHsien Subsea Engineering Co. has service outlets nationwide: Just give us a call, and our leakage repair experts will be on their way to assist you promptly. Our affordable services are worth your choice.
We can meet your company's needs. We can arrive on-site the day we receive your call, providing a satisfactory construction plan and product quotation. We look forward to a pleasant collaboration with your company and a mutually beneficial outcome!
Our Goal: To become a leading brand in China's construction diving industry!
Our mission: To make every Chinese construction company more competitive!
Our Services: Provide underwater operation solutions and underwater sealing construction services for owners and construction companies.
Our Team: A team from civil air defense engineering construction, with top-notch leak prevention research and development talent, experienced construction teams, and extensive underwater operation expertise!
Prior to each dive, a pre-dive briefing is conducted focusing on diving-related matters. The construction process is explained to each diver. Divers are strictly prohibited from diving if they are suffering from a cold or any discomfort. If divers encounter situations that do not match the original estimates or the work information provided by the previous dive team, they should immediately communicate with the surface crew and report the issue, handling it decisively. If it affects the construction, the following services are available: 1. Diving work, underwater construction for bridges, power plants, docks, drainage and water intake projects for thermal power plants, underwater inspections and diving for reservoirs and hydroelectric power stations, underwater formwork pouring, underwater sealing, and underwater leak repair. 2. Dredging of pile hammers, basebed recompaction, caisson construction, underwater excavation, sediment removal, geotextile slope protection, underwater pipeline and cable work, underwater painting, and underwater equipment installation. Vessel services include: 3. Dredging, leak sealing and storage repairs, marine life removal, propeller cleaning, sea door sealing, corrosion treatment, oil rig maintenance, etc. Underwater cutting and welding services include: diving work, diving engineering, diving installation, diving operations, sewage pool sediment removal, sludge removal from sewage pools, sewage pool sealing, underwater cutting of cast-in-place piles, underwater removal of cast-in-place piles, underwater cutting of steel piles, underwater removal of steel piles, underwater concrete cutting, underwater concrete removal, underwater cutting of steel sheet piles, and more.
Hwa Hsien Company sincerely seeks to cooperate with all sectors of society, providing dedicated service to jointly create a better future, with customer satisfaction as our highest goal. Features of Leakproofing: 1. Environmental friendly: Good mechanical performance, no noise. 2. Portable: Small size, light weight (body weight 5kg), easy to carry, simple operation. 3. High pressure capability: Achieves 0-50Mpa working pressure in a few seconds, advanced technology, time-saving, labor-saving, high efficiency. 4. Reliable technology, reasonable structure, easy to use.
What are the methods for pool leak repair, and what is the construction process for it? Today, the editor will share this knowledge with you. In fact, solving pool leaks can start from the source. As long as we strictly control the quality of materials, use chemical grouting materials with product certificates, manuals, and technical reports, and only proceed after on-site sampling and re-examination, we will never use counterfeit products. Moreover, adhering to strict operational procedures and technical specifications, and not cutting corners during construction, will generally suffice.
1. During underwater operations, 1) Determine the repair plan: Before plugging leaks, a site survey is necessary to understand the concrete construction quality, analyze the causes of leakage, identify the location and dimensions of cracks (width, length, depth, and penetration), and understand leakage conditions during rainy and dry seasons. Measure the flow and velocity of leakage, and through thorough investigation, correctly formulate the repair plan and prepare for all necessary steps. 2) Material Performance Characteristics: The DH-814Ⅱ polyurethane quick-plugging adhesive reacts upon contact with water, a unique advantage as the slurry is not diluted or washed away due to the water's participation in the reaction. This is not a feature of other grouting materials; under pressure, the slurry is injected into concrete cracks and also permeates around them. Upon contact with water, it reacts, foams, and expands to form a secondary permeation, continuing to seep into the concrete gaps and ultimately forming a mesh-like structure. It is a low-density, water-containing elastic body with good adaptability to deformation and excellent water-stopping properties. 3) Design and Placement of Grouting Holes: Grouting holes can be placed either along the crack or at an angle, based on actual conditions and requirements. Both methods can be used simultaneously if necessary.
1. Construction Process: Determine leak point → Cleanse leakage surface → Drill holes → Clean → Install grout nozzle → High-pressure inject foam material → Observe → Leak repair → Remove grout nozzle → Repair slot holes → Inspect → Accept
2. Construction Key Points:
(1) Locate and clean the water leakage points, ensuring the affected area is thoroughly cleaned.
(2) Pre-bury the grouting pipes with a quick leak堵agent, the spacing should be determined based on actual conditions, generally around 1 meter.
(3) Use an electric high-pressure grouting pump to inject water-soluble polyurethane sealant into the concrete gaps through the grouting tube until it can no longer be pushed in (injection rate ≤ 0.011/min). Then, close the valve and remove the grouting nozzle after 24 hours.
(4) To achieve long-term waterproofing, it is recommended to apply a polyurethane waterproofing layer on the construction surface.
(5) Clean equipment and tools promptly with solvent after grouting is completed.
(6) Ensure proper ventilation on the construction site, be vigilant about fire prevention, and strictly prohibit any open flame.
Hydroelectric power station reservoir leak prevention and plugging construction unit. The basic principle of the waterproofing and plugging method used is chemical grouting. Chemical grouting involves using manual or mechanical means to seal leaks while submerged, under pressure, injecting specialized chemical grouting materials into the structural cracks of buildings, causing the grouting material to solidify within the cracks, thereby filling the gaps and stopping water leakage.
Underwater Construction Safety Emergency Measures: The project dispatch center should maintain contact with local meteorological and hydrological stations at all times, listen to actual weather conditions daily, and keep detailed records. This ensures the ability to promptly grasp and respond to weather changes and rainfall dynamics. Strictly adhere to the requirements for fuel supply and reception to prevent leaks. For cracks that penetrate, methods such as sealing, burying pipes, and chemical grouting can be used. For non-penetrating cracks, due to the airlock, it is difficult to fill the liquid to the tip of the crack, thus unable to eliminate the stress concentration area formed in the high zone. Therefore, comprehensive consideration of various factors should be given during treatment to improve the filling rate of the liquid. For temperature cracks, considering the "lag effect" of concrete structures on temperature, it is generally advisable to perform grouting and leakage prevention during the low point of concrete body temperature for better results.
Hydroelectric power reservoir leakage prevention and plugging construction unit, grouting is a new type of chemical grouting plugging technology using two-component grouting. The three raw materials are weighed and mixed with water to form the A liquid, and solid sulfur is weighed and mixed with water to form the B liquid. After mixing the two liquids, a polymerization reaction occurs, with initial setting in 30 seconds and complete reaction in 2-3 minutes, finally forming a gel. The grouting is applied in a water-soluble form into the structural layer, with low viscosity and good permeability, able to inject into cracks below 0.1mm. The grout can coagulate under moist, fast water flow, and large water volume conditions; the gel has good anti-seepage properties, expands when encountering water, and is resistant to erosion. The compressive strength of the gel is 0.01-0.06MPa, and the tensile strength is 0.02-0.04MPa.
Grouting methods are primarily used for leaks with high water flow, scattered water streams, and areas where sealing cracks and individual water outlets are not conducive. The sealing positions are determined based on the crack conditions. Internal grouting is conducted to seal water flow paths and cracks, or to concentrate water flow for easier sealing. For concentrated outlets with a leak rate exceeding 150mL/min, the water diversion grouting method is employed to stop the water flow. First, drill holes at the outlets, ensuring the drilling depth does not穿透 the structural layer and is no less than 20cm to avoid excessive grout dispersion during the process and to clear intricate fine cracks around the outlet for pressure relief. Then, clean out the gravel and debris from the hole, embed a 25mm diameter plastic flexible tube into the water diversion hole using quick-setting gel, and finally, finish the mouth with mortar.
Our company addresses the water leakage issue in buildings by using imported nano-micro molecule chemical waterproofing and plugging materials as the main agent, mixed with various chemical substances to create Liquids A and B. Upon mixing, a polymerization reaction occurs, with initial setting in 30 seconds and complete reaction in 2-3 minutes, forming a gel. The grouting is performed in a water-soluble form into the structural layer, featuring low viscosity and good permeability, capable of filling cracks smaller than 0.1mm. The slurry can coagulate under damp conditions, high water flow, and large water volume. The gel also boasts excellent impermeability, water swelling, and resistance to erosion, with compressive strength of 0.01-0.06MPa and tensile strength of 0.02-0.04MPa. Using specialized high-pressure grouting equipment, an equal amount of slurry is injected into the leakage areas, binding particles between cracks and soil, effectively sealing concrete cracks and capillaries, enhancing soil bearing capacity, and ensuring no leakage for over 20 years, achieving complete waterproofing. This eliminates the worry of water leakage for construction companies and property owners! As a comprehensive enterprise in China specializing in water-plugging technology development and construction, we apply and promote nano-reverse pressure grouting technology, with over 40 years of construction experience, equipped with advanced waterproofing and plugging construction equipment. We help businesses alleviate concerns about leakage issues, becoming a trusted unit for waterproofing and plugging projects. This technology has yielded significant economic, social, and environmental benefits for numerous enterprises.
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