Analysis Of Space Effect Of Anchorage Frame Beam Support Structure

Because of the mountainous terrain in our country,a lot of slopes are involved in the construction of houses,roads and dams.Because the instability and destruction of slopes are dangerous and fast,it is often difficult for people to make timely and effective countermeasures.Therefore,it is necessary to effectively protect the slope that may be damaged.After a long period of development,the supporting measures of the slope are moving in a diversified direction.Anchorage cable frame beam support is a new type of support mode developed from the eighties of last century,because of its significant support effect,At the same time,the frame beams of the supporting structure of the anchor cable frame beam can be combined with greening measures accordingly,and the environment can be beautified while maintaining the soil and water of the slope.,which has a good application prospects.Due to the short development time,the current problem is that the theoretical research lags behind the engineering practice.The research on the cable frame beam in China is not yet mature at present,and there are few researches on the application of the cable frame beam support in the more complex slope.This paper takes an L-shaped slope in Fujian NingDe as the research object to analyse the excavation characteristics of slope by three-dimensional finite element model.The main contents of the study are as follows:First of all,introduced the PLAXIS software and finite element numerical analysis methods and slope numerical analysis method.Based on the comparison of different constitutive models,described the principle of strength reduction finite element method.Secondly,using the established three-dimensional model,the influence of slope load,prestress of anchor cable,anchor cable anchorage angle,length of anchor cable and spacing of frame beam on the slope displacement,internal force and other slope characteristics of support structure are analyzed.Then,using the finite element software PLAXIS 3D,the three-dimensional model of the L-shaped slope of the anchorage frame beam is established.The slope stability is calculated by the strength reduction method.Based on the possible slip surface calculated by safety,The influence of the factors such as the load on the roof,the prestress of the anchor cable,the anchorage angle of the anchor cable,the length of the anchor cable and the spacing of the frame beam on the failure mode of the slope.Afterwards,according to the background of the engineering examples based on the thesis,the examples are analyzed,and the existing characteristics of the rock and soil properties of the actual site and the surrounding environment are known through the existing data.On this basis,the numerical analysis model is established through reasonable generalization.Comparing the numerical analysis results with the actual monitoring results,the feasibility of the finite element numerical simulation method in practical application of the project was verified.Finally,the paper summarizes the research contents and achievements,analyzes the shortcomings,and puts forward some suggestions for further research in the future.