【正文】
ngle of anchor: with the angle of horizontal line is 20176。 strengthening 1. Introduction Anchor technique uses strata geotechnical’s shear strength around bolt to deliver structures pulling force or keep strata of the excavation own stability. Due to the use of the anchor rod, Anchor strata produce pressive zone and have reinforcement effect to strata, can enhance the strength of strata, improve mechanical properties of strata, make structure and stratum together formed a kind of work together plex. Anchor system can effectively sustain tension and shear, improve shear strength of the potential sliding surface, so it can effectively prevent slope to produce sliding damage. Fig 1 after excavation of the slope 2. Project profile The length of a slope is about 60m, the most slope height is about 23m,the angle up to 50176。Discussion about the application of the anchor bar on the slope construction Fu Ming Fu , Zhang Tian Abstract: There are some advantages in strengthening slope with the anchor bar, such as low project cost, convenient for construction and so on. It not only meets the requirement of the reliability of the construction, but also is economic and reasonable for the construction. Key words: anchor bar。 slope。 ~ 75176。 , and drilling down with this Angle. ( 5) Anchor use the steel bar, which is HRB400 level, 28mm diameter. Anchor calculation ( 1) The calculation of lateral geotechnical pressure[1][2] When the supporting structure to leave in rock and earth mass direction migration until to the limit equilibrium state, the geotechnical pressure which is role in supporting structure called active geotechnical pressure. Its calculation method is as follows: For the slope which has no flare structure surface, generally speaking, failure is controled by rock mass strength, the calculation formula is same to the active soil pressure, but cohesive force C take zero, internal friction angle ? use e? (rock mass equivalent internal friction angle) instead of, according to the standard to selection。 +? /2( ? is rock mass internal friction angle, is estimationed by haircut at the standard of rock mass internal friction angle, reduction factor according to the standard to selection). According to the engineering survey, active rock pressure can calculation as follows: ( 2) the calculation of anchor tension design value a Q akNN??