Model Test Study On Anchorage Characteristics Of Basalt Weathering Soil Slope

Basalt are widely distributed in guizhou area, the engineering properties of basalt arecomplex to grasp. It cause a large number of slope instability, foundation uneven deformationand structure deformation, rock mass structures collapse, landslide, debris flow, etc. Engineeringdiseases and geological disasters often occurred. Bolt is an important means of anchoringengineering, which has been widely used in slope engineering, foundation pit engineering andother fields. Bolt support uses lightweight equipments with simple technology and costs lower,and makes the construction fast. Because of all these advantages, it is widely used in all kinds ofengineering fields. Soil is a kind of loose medium. Under external force, the plastic deformationof soil is large, but it is not allowed to have large displacement in the practical engineering, sothis is a problem of anchor technique. The research of bolt support, not only has theoreticalsignificance, also has important application value. Based on basalt weathering of soil slopeanchor as the research object, through the indoor model test and combined with theoreticalanalysis, anchor rod anchor of basalts weathered soil slopes are analyzed with the researchmethods.1. Analyzing the basic characteristics of the basalt weathering of soil and basalt weatheringdisaster characteristics of soil cutting slope, slope disasters prevention and control method wereproposed, and the anchorage mechanism of slope anchor was studied, and as to mechanicalproperties of different types of anchor rod, the anchor effect had a larger gap.2. By slope anchoring indoor model test, the strain curve of single anchor, the anchordifferent points within the same column in ooze water, different load, different time of straincurve has carried on the contrast analysis, which includes the analysis of the effect of theultimate bearing capacity of anchor bolt anchorage length and the load-displacementrelationship of different anchorage length of bolt. It found that the internal force distribution ofpressure type anchor rod due to tensile type anchor rod, and the top and bottom bolt shouldstrengthen processing, and cement grouting soil body and the quality has a great influence on theanchoring effect.3. Through the water penetration test, it found that the rainfall infiltration on the slopeanchor effects research. Analyzing the soil moisture content p-s curve of anchor bolt, anchorstrain and ultimate pull-out force of anchor, and the influence of seepage loss of prestress ofanchor bolt, and the anchor rod different points within the same column strain curve after thewater seepage is analyzed, the research found that bolt strain distribution has the certain timeeffect, in which bolt bearing capacity decreased with increasing water content, the ultimatepull-out force is not completely linear relationship with water content. 4. Analyzing all kinds of anchoring parameters on the anchoring effect and invalidation, itfound that soil water contents increasing results in the decrease of shear strength of soil, which isone of the most important reason, the loss of prestress has a great influence on the anchoringeffect.