A：
Applicable scenarios:

· foundation pit support (depth 10~25m), temporary slope reinforcement, underground structure anti-floating (clause 1.0.2);

· It is especially suitable for sensitive environments such as adjacent subways, ancient buildings, and dense pipeline areas (case 2/4).

Design life:

· The standard design period is 1~5 years (clause 3.0.2), which meets the needs of most temporary projects;

· Durability is ensured by an anti-corrosion jacket (HDPE + grease) (clause 4.0.4).