New Preference for Old Dam Renovation: Shield Rubber Dam Solution to Efficiently Revitalize Aged Water Conservancy Facilities

In the operation and maintenance of water conservancy projects, traditional dams such as rubber dams, cement flap dams, and hydraulic dams often face problems like functional degradation and high maintenance costs as their service life increases. The traditional renovation method not only requires large-scale demolition and reconstruction but also has pain points such as large capital investment, long construction period, and damage to the original foundation structure. The emergence of shield rubber dams has provided a disruptive solution for old dam renovation. With its high adaptability to the original foundation, it has become a core choice for upgrading aged water conservancy facilities.

I. Core Advantages: Cost Reduction, Speed Acceleration, and Structure Preservation

The core competitiveness of shield rubber dams in old dam renovation is concentrated on the optimization of cost, construction period, and the original structure, which perfectly solves the core pain points of traditional renovation:

1. 1. Significant Cost Reduction: The construction is directly carried out on the original concrete foundation slab, eliminating the need for demolishing the old dam foundation and re-pouring the slab. This saves a large amount of material, labor, and machinery costs, and significantly reduces the investment in renovation funds.
2. 2. Dramatically Shortened Construction Period: It avoids the complex procedures of traditional renovation. Generally, the renovation of ordinary projects can be completed in as fast as 10-20 days, which greatly reduces the impact of construction on the normal operation of water conservancy projects, and is especially suitable for projects with tight schedules.
3. 3. Structural Safety Guarantee: The renovation process does not change the design structure and strength of the original dam body, fundamentally avoiding damage to the foundation caused by demolition and reconstruction, and maximizing the preservation of the core value of the original facilities.

II. Applicable Scope: Covering Mainstream Types of Old Dams

Shield Rubber Dams have strong compatibility and can specifically address the renovation needs of three mainstream types of old dams without the need to design separate renovation frameworks for different dam types:

• • Renovation of Old Rubber Dams: Aiming at the problems of rubber dams such as easy aging, water leakage, and frequent maintenance, shield rubber dams improve the sealing performance and durability of the dam body through a stable airbag and shield plate structure.
• • Renovation of Old Cement Flap Dams: To solve the pain points of cement flap dams such as easy jamming and severe wear of flaps, the shield rubber dam adopts a combined design of flexibility and rigidity, reducing the probability of mechanical failures.
• • Renovation of Old Hydraulic Dams: To improve the problems of hydraulic dams such as easy oil leakage in the hydraulic system and complex maintenance, the control system of the shield rubber dam is simpler, and the subsequent operation and maintenance costs are lower.

III. Standardized Construction Process: Rigorous Steps to Ensure Renovation Quality

The renovation of old dams with shield rubber dams follows a scientific process of "Survey - Scheme Design - Construction - Commissioning". Each step has clear standards to ensure the stable and reliable operation of the dam after renovation. The specific horizontal flow chart and step-by-step explanation are as follows:

(I) Preliminary Preparation: Accurate Planning to Lay a Foundation

1. 1. On-Site Survey: Conduct a comprehensive investigation of key information such as the foundation strength of the old dam, structural integrity, and surrounding hydrological environment. Through on-site measurement and data recording, provide accurate measured basis for the subsequent scheme design to avoid disconnection between the scheme and the actual situation.
2. 2. Determine Renovation Scheme: Based on the survey results and combined with the characteristics of the old dam type (rubber dam/cement flap dam/hydraulic dam), customize a personalized renovation scheme. Clarify core parameters such as the position of planted rebars, pipeline direction, and component specifications to ensure the scheme is both feasible and adaptable.

(II) Foundation Construction: Strengthen the Base to Ensure Stability

1. 1. Foundation Treatment: Clean up impurities, floating dust, and damaged parts on the surface of the old dam foundation, and repair small cracks to ensure the flatness and structural stability of the foundation surface, providing a qualified working surface for subsequent processes.
2. 2. Foundation Rebar Planting: Drill holes in the foundation slab according to the designed spacing and depth, implant high-strength rebars, and enhance the connection strength between the new structure and the old foundation through professional anchoring technology to improve the overall shear and tensile capacity.
3. 3. Pipeline Grooving: Accurately excavate pipeline grooves at the preset positions of the foundation, strictly control the depth and width of the grooves to ensure smooth pipeline laying in the follow-up and avoid affecting the system operation due to grooving deviations.

(III) Component Installation: Implement Step by Step and Strictly Control Precision

1. 1. Lay Embedded Parts and Pipes: First, install the embedded parts for fixing the airbags and shield plates, ensuring the embedded parts are accurately positioned and firmly fixed. Then, lay the air inflation and deflation pipelines simultaneously, and check the sealing performance of the pipeline joints to avoid air leakage and water leakage problems in the follow-up.
2. 2. Core Component Installation: Complete the three core steps in sequence - airbag installation (check the integrity of the airbag and ensure it fits closely with the embedded parts), shield plate installation (adjust the flatness of the shield plate to ensure no gaps at the joints), and control system installation (debug the control buttons and signal transmission to ensure clear operation logic). For each step, it is necessary to check the dimensional deviation on-site, and only after meeting the technical standards can the next process be carried out.

(IV) Quality Inspection and Commissioning: Comprehensive Verification to Ensure Compliance

1. 1. Quality Inspection: First, inspect the appearance of the shield rubber dam to check whether the airbags and shield plates are deformed or damaged. Then, conduct an air tightness test (monitor the air pressure change within a certain period to judge the sealing performance) and a pressure resistance test (simulate high water level pressure to test the bearing capacity of the dam body). Only after both tests meet the standards can the next step be carried out.
2. 2. Water Storage Commissioning: Gradually increase the water storage capacity of the dam body, simulate different water level scenarios in actual operation, observe the water retaining effect of the dam body and the response speed of the control system. Ensure there is no leakage in the dam body and the control function is normal, and finally realize the stable operation of the dam body after renovation.

IV. Supporting Data Support: Intuitive Understanding to Facilitate Decision-Making

To help customers better grasp the entire renovation process and actual effects, a full set of supporting data is provided for the renovation needs of old dams:

• • Rubber Dam Renovation Video: Dynamically show the construction process of the renovation site and intuitively present the operation details of each process.
• • Actual Photos of Rubber Dam Renovation Scheme: Present the implementation effect of the scheme in the form of real photos and compare the status of the dam body before and after renovation.
• • Rubber Dam Renovation Construction Scheme: Explain in detail the construction technical standards, safety specifications, and construction schedule to provide written reference for project implementation.

With the core advantages of "low cost, short cycle, and high adaptability", shield rubber dams provide a one-stop solution for the renovation of rubber dams, cement flap dams, and hydraulic dams mentioned in "Old Dam Renovation.docx". It can not only quickly revitalize aged water conservancy facilities but also ensure long-term stable operation, making it an efficient and preferred solution for old dam renovation.