2017年07月25日

Anchor bar supporting

Self drilling anchor bar is a new supporting method under new situation, it adopts special working technology to combine drilling, grouting and anchoring together. All working procedure can be done in one process, so construction is time-saving, energy-saving and high-efficient. It belongs to active support during the whole construction. Recent years, with increase of power demand, hydroelectric station is constructed more and more.
Self drilling anchor in hydroelectric station mainly reflects on dam foundation, diversion tunnel and slope reinforcement. So, it has great influence on hydroelectric station.

Self drilling anchor support can take full advantage of soil body’s self-bearing capacity. Compared to shotcrete support, it has characters of safety, high efficiency and convenience. It can be operated at small spaces, so under allowable condition, adopting self drilling anchor can enhance efficiency largely.

1. Applicability.

Generally speaking, self drilling anchor is suitable for foundation pit support or slope reinforcement with artificial soil, clayey soil and weak cement sandy soil above underground water or after artificial precipitation.

2. Engineering investigation.

Engineering investigation is an essential work for ensuring project’s safety and reliability. As for self drilling anchor project, two points should be noticed specially: underground pipelines and underground water. Distribution of underground pipelines and underground water should be listed in investigation report in order to do design work in advance.

3. Design and monitor problems.

Based on soil condition, soil deformation and stressed condition of self drilling anchor, distance and length of self drilling anchor should be adjusted.

Correct and reasonable design is the precondition for ensuring construction quality, which directly influences engineering safety, duration and economic investment.

Monitoring work mainly includes horizontal deformation, settlement, stress force of self drilling anchor and soil pressure. They can be chosen according to practical situation.


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