Adjustment pool quality appraisal

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regulating pool is based on the core principles of hydraulic balance and pollutant buffering control. By optimizing the pool structure design, volumetric efficiency and mixing system efficiency, it achieves synergy of water quality and quantity regulation, sedimentation pretreatment and impact load resistance. It is widely used in sewage treatment plants, industrial wastewater treatment and rainwater storage and other fields. In municipal sewage treatment, it is used to balance the incoming water load; in chemical industry parks, it meets the buffering and dilution needs of high-concentration wastewater; in rainwater management, it realizes combined overflow pollution control. Compared with ordinary storage tanks, regulating tanks have the characteristics of strong anti-seepage and anti-corrosion properties, excellent structural stability, and low operation and maintenance costs. They are the core structure for the stable operation of the water treatment system.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide regulating pool quality appraisal services. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for regulating pool quality appraisal.

As environmental protection supervision becomes stricter, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1, performance index dispute: insufficient actual effective volume, anti-seepage performance not up to standard;

2, material defects: concrete impermeability grade, waterstop tensile strength;

3. Process problems: Improper handling of construction joints caused leakage, and deviations in the installation of flow pushers led to hydraulic blind spots;

4. Contract performance disputes: key material replacement, structural design and technical agreement were inconsistent.

0 Such cases require structural inspection, hydraulic simulation and material failure analysis to clarify the quality responsibility.

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regulating pool quality appraisal technical methods mainly include:

1. On-site inspection: conduct a visual inspection of the regulating pool and record its geometric dimensions, materials, structure, construction technology and other information.

2. Material testing: Sampling and testing of materials used in the conditioning pool to analyze their physical, chemical and mechanical properties.

3. Process inspection: Inspect the construction process of the regulating pool to evaluate whether it meets the specification requirements.

4. Functional testing: Evaluate the flow regulation and level control capabilities of the regulating pool through flow monitoring and level measurement.

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A sewage treatment plant of the applicant signed a "5000m³ Regulation Pool Construction Contract" with an engineering company of the respondent, agreeing on the anti-seepage level P8. After it was put into use, leakage from the bottom of the pool caused groundwater contamination. The construction company argued that it was caused by geological subsidence.

Identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of the "regulation pool", contract technical agreement, on-site investigation case materials and other data, and made the following quality analysis opinions:

involved in the case, the concrete impermeability level of the regulating pool body is only P4 (agreement P8), and the waterstop joint strength is 9MPa (agreement ≥15MPa); CFD simulation shows that the push flow blind area accounts for 25% (agreement ≤10%); the leakage rate at the expansion joints reaches 0.5L/m²·d (agreement ≤0.1L/m²·d).

The appraisal conclusion determined that material and construction defects were the main cause of leakage.

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Appraisal report content

The regulating pool quality appraisal report should include:

1, appraisal purpose and reference standards;

2, specifications involved, production batch number, construction record;

3, testing methods and equipment list;

04, analysis of correlation between testing data and failure;

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25, clear conclusion and technical basis for quality responsibility determination;

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46, signature of appraiser, professional qualification certificate and official seal of the organization.

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