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Tianjin City drainage pipeline CIPP rehabilitation project completed successfully
Recently, the drainage pipeline CIPP rehabilitation project of Tianjin development
district tenth avenue (Nanhai Road to Taifeng road) gains with inspection and
acceptance successfully, which is contracted by trenchless department of company,
complete the rehabilitation DN400~DN1200 diameter pipeline, 2108 meters, and
solves the stagger, fracture, corrosion, leakage and other structural defects of existing
drainage pipeline .
The project adopts the steam curing method CIPP rehabilitation process, use the
existing inspection to repair, and achieve 100% trenchless to repair the old pipeline.
Use thermosetting resins and nonalkali fiberglass material, repairing lining layer
thickness refers to the association of American engineers design standard
ASTM F1216 and ASTM F2019 and issued by the ministry of housing and urban-rural development of the People's Republic of China industry standard《the urban drainage pipeline trenchless rehabilitation update technical regulations》.
Tianjin project management and technical personnel of Trenchless department,
According to the design requirements and the tender documents, combine with
the practical situation of Tianjin tenth street drainage pipeline, take effective and
security measures, overcome the original pipeline buried depth that is larger and
deposition seriously detrimental to pigging, branch pipe flow more difficult to block
water diversion, small room inspection well is not easy to work well under such as
adverse factors, realize the commitment to the owner as following:
(1) Safety civilization construction, no major safety accident.
(2) Not make excavation operations, using inspection Wells to reach 100% trenchless
repairing the old pipe.
(3) According to different lining layer thickness (4 mm to 10 mm), molding once,
regardless of gradation construction.
(4) Lining construction takeoff the membrane process, lining tube wall surface is not
for plastic materials.
(5) Tianjin quality supervision and inspection station test the quality of lining layer
technology indicators: bending elastic modulus of more than 12000 mpa, axial tensile
strength greater than 82 mpa, ring tensile strength greater than 118 mpa, the lining
surface not less than 40 bar hardness D.
Tianjin project work of Trenchless department, obtained the supervision party, the
owner, and Management Companys consistent affirmation, they think the company
has high construction management specification, construction technical level, and
construction quality, the company focus on the quality and credit enterprise, and
trustworthy!
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