Anchor Reinforcement Technique And Analysis On Static And Dynamic Behavior Of Subsurface Structure

With the rapid development of construction technology, the height of the building in the city is becoming higher and higher and the density is also increasing. This phenomenon is not only a test to building materials and structure, but also a test to its foundation engineering. Anchorage technology is an important way of strengthening the construction foundation engineering, which spreads all over the whole construction industry such as slope support, underground excavation, embankment reinforcement, anti-floating of water pool anti-overturning of engineering structure and so forth.Although bolt supporting technology has been applied in many engineering areas has been widely used, but interaction mechanism and mechanical behavior between bolt and its surrounding medium has not been definite yet, so it is necessary for profound research. As a reinforcement member, how to reduce the influence of external load on the bolt is a very important work in design of anchor rod. Internal force changing rules between the bolt and its surrounding medium were studied; various conditions were analyzed and calculated. The main research work is as follows:Collect some design cases and related analysis data of bolt supporting engineering in Luoyang.Arrange theoretical solution of anchor rod displacement on the Mindlin problem and describe the distribution of shearing stress and axial force along the length direction. Changing rules on shearing stress of different contact materials and elastic modulus of the bolt were compared. Anchor bolt bearing capacity for several groups of different materials and size were also compared. The key factors affecting the ultimate bearing capacity of anchor bolt were analyzed.Combined with modeling idea of half-infinity space, finite element method was applied to research perfect elastic-plastic of soil. Mechanical property of single anchor bolt subjected to normal to axial soil load and dynamic load of side slope was calculated. Weak load-bearing locations of soil in the corresponding environment were found by analyzing theoretical solution. Structural section of anchor bolt supporting engineering which includes 12 anchor bolts was selected and its displacement was limited. Finite element software was used to apply compressive loads in different locations and values to the model. Mechanical behavior of anchor bolt and soil along corresponding directions was analyzed.Date and images on vibration situations of anchoring cavity surface bearing dynamic loads were collected and analyzed by local instrument monitoring. Weak load-bearing location of top surface was obtained. Related reinforcement measures were proposed according to factors of weak load-bearing.Formula derivation, finite element method and instrument monitoring were applied to research functional mechanism of anchor bolt and mechanical behavior of bolt supporting engineering. The main conclusions in this paper can provide certain reference and guidance for similar engineering practice.