First, the cause analysis:
(1) The quality of the pipe joint and sealing material does not meet the technical standards or the pipe joint is damaged during transportation, loading and unloading, and installation.
(2) The deviation of the pipeline axis is too large, resulting in misalignment of the interface, uneven clearance, and dense filling material.
(3) Improper selection of interface or water stopping device.
2. Governance methods.
It can be treated with epoxy cement mortar or chemical grouting.
Third, reinforced concrete pipe joint cracks: there are obvious cracks in the longitudinal and circular direction of the pipe joint, causing water leakage and leakage in the pipeline.
(1) Cause analysis:
1) The quality of the pipe joint is not qualified.
2) During the jacking process, the jacking force exceeds the pressure bearing strength of the pipe joint, or the axis deviation is too large, resulting in the concentration of the stress of the pipe joint and damage.
3) Improper installation methods for transportation, loading and unloading, and stacking, resulting in damage to the pipe joint.
(2) Governance methods:
Carefully analyze the causes and properties of cracks, according to different stress conditions, take different treatment methods, and ensure the original bearing capacity and integrity of the structure after treatment.
