The Mechanism Studies Of Effect On Base Hole By Anchor Grouting

Obtains from the anchor rod note thick liquid to the hole excavated for building foundation supports and protections system's impact analysis, the use mechanics principle, the research note thick liquid to the anchor rod peripheral soil body mechanics character's influence, elaborated that the Compaction grouting mechanism, establishes the supposition model; Uses finite difference software FLAC2D to come to the hole excavated for building foundation anchor rod note thick liquid process to carry on the simulation, the analysis soil body parameter to the Compaction grouting value influence, carries on the contrast with the theoretical formula, the discussion most superior anchor rod note thick liquid value of pressure, this article through the above a series of preliminary studies, obtained some meaningful conclusions in the theory and in practice.Through the densification note thick liquid to the anchor rod peripheral soil body's mechanics character influence's research, thought that the grouting process may divide into three stages: 1. Compaction grouting stage, the size appears the columnar distribution.; 2. Compaction grouting start stage; 3. Compaction grouting damaged stage, Grouting pressure reached critical pressure pit wall damage.Integrated bolt grouting effect of a three-stage research and analysis, That range limit compaction grouting pressure pit wall and the destruction of critical pressure in the range of ideal bolt grouting pressure values, The formula can be expressed as:Through utilization finite difference software FLAC2D to the hole excavated for building foundation anchor rod note thick liquid's simulation, has analyzed soil layer shearing strength parameter C,Φto the Compaction grouting influence, thought that C,Φis obvious to the Compaction grouting influence, the most superior Compaction grouting along with C,Φthe value will increase increases, and the cohesive force must be bigger than the angle of internal friction obviously to the Compaction grouting influence. Carries on the anchor rod Compaction grouting lamination simulation through the selection hole excavated for building foundation project example, from this obtains the Grouting pressure's extreme value and theoretical analysis's result tallies basically, this explained that the theory Grouting pressure formula can the real reflection soil body stress situation, have certain guiding sense to the actual project.