Study On Force Traits Site Test Of Micro-piles In Landslide Reinforcement

The micro-piles have the following advantages in the landslide reinforcement: itcan be used in complex terrain conditions, it will shows obvious advantages especiallyin difficult access and narrow site conditions. It has little vibration and disturbance tothe surrounding strata during construction. It can through the complex Stratum aboveand under the groundwater. The construction is mainly on the ground, in this way,guarantee the safety of construction workers effectively, especially, when the landslidelot or potential landslide lot. In short it can improve the construction speed, shorten theconstruction cycle, it can receive an efficient and fast results in the rescue works. But, ittakes a short time before the micro-pile was used in the landslide reinforcement, themechanism and failure mode has not yet fully aware of the micro-pile’s reinforcement.At the same time, people lack of monitoring data about the micro-pile reinforcementlandslide. It will be difficult to obtain the micro-pile force modes and other features inthe actual engineering. Therefore, it must be necessary to lunch the monitoring studieson micro-piles.The study on the force traits of Micro-piles has a very important significance inLandslide reinforcement. In this article, the author conduct research according to thebasis of domestic and foreign related researches and the landslide control project in theBaoji city, through on-site investigation, monitoring, laboratory tests and other means,the research mainly in the following aspects:（1）Based on the site conditions of the landslide site in the Baoji city,analysis thesurvey data about this landslide, master the deformation and failure process of thelandslide, and then studied the resurrection of the ancient landslide mechanism. （2）According to the real-time monitoring about the pressure of the soil of themicro-pile, the thrust which the micro pile suffered and the real-time changes in theprocess of pile of the soil resistance has been got. Through the comparison ofmonitoring data with the theoretical value, a correlation coefficient β has obtainedbetween the transform between them. In this way, it can provide regional accumulationof valuable design parameters to similar project.（3）Welding two symmetrical reinforcement meters on both sides of the micro-pile,monitoring the real-time reinforcement meter’s data. The author analysis the force statesof the micro-pile along the depth direction. In the same way, the author got themicro-pile internal force distribution law and the working condition in different periods.（4）By contrast to the three rows of micro-pile in the same depth, but on differentrows of the micro-pile, the force distribution ratio between different rows of themicro-pile. Thus, it can provide practical data to determine the number of micro-piles ofthe same cross-section in landslide control engineering.（5）Through the laboratory model test, the author got the load-span deflectioncurve of the ultimate bearing capacity of the micro-piles under pure bending inlaboratory. Comparing with the field test data, judge the scene of the micro-pile forcestate. And evaluate the stability of the landslide.