Research On The Technology High-embankment Building About V-shaped Valley Grained

Mountain road often needs to come across the V-valley frequently. The gradient at the ground of valley is steep; in addition, local settlement, slope instability and many other disease problems are exited the in high-embankment overall settlement construction process, which seriously affecting the quality of the valley high fill embankment and operational safety. Grained soils always come from the tunnel slag filler, with a large particle size and deformation of complex features, the engineering properties of fillers will have a greater impact on roadbed stability and deformation. Under normal circumstances, the engineering properties of filling roadbed filler (that is soil) mainly affected by the content of coarse particles larger than 2mm in diameter, with the viscosity of fine particles and cohesion less silt. Therefore, to improve the stability of the giant grain V-shaped valley areas of high fill subgrade soil has become a mountain highway construction problem to be solved. This paper relies on Yannan Road Grained Soil High-embankment projects expands research on grain soils dominated by giant tunnel slag material as a V-shaped valley road embankment+ultra high embankment retaining structure design and construction techniques.First, through the study of the physical and mechanical properties of the giant grain of soil residue material, the paper analyzes variation in different water content and different degree of compaction strength indicators, evaluates suitability and feasibility of grained soil tunnel slag as roadbed filler.Second, the paper puts forward two designs of the proposed sheet pile retaining wall stone tablets strong feet and C25 concrete retaining wall anchor anti strong foot, uses the finite element method to calculate the deformation and stability of the two programs. The paper also establishes a two-dimensional plane elastic-plastic model to analyses the effect of stability and deformation by features section of embankment slope valley floor fillers and binding mode, compaction, gabion embankment.Third, the paper establishes a three-dimensional finite element model to analyze the stability of settlement and variation in different heights and different filling degree of compaction conditions V-shaped valley ultra-high embankment, and gets V-valley fill+ultra high embankment retaining structures settlement, lateral displacement occurs and the law of development and size of the earth pressure. The results show that compared to two-dimensional stability factor, three-dimensional, three-dimensional of V-shaped valley ultra-high embankment settlement, which accords with the three-dimensional boundary effects of V-shaped valley ultra-high embankment and practical engineering applications, and are beneficial to the proper evaluation of the ultra-high embankment settlement valley and stability.Fourth, on the basis and summary of reinforced gabion retaining wall on the composition, characteristics, design theory.the paper analyses stability and deformation of gabion reinforced gabion retaining wall of different sizes by using finite element numerical simulation and in corporation of actual engineering. Besides, the paper evaluates the use of reinforced gabion retaining wall durability.Fifth, the paper puts forward V-shaped valley fill+ultra-retaining structures roadbed construction program and technical measures, while road tunnel slag material as a fill. Stratified paving and rolling were used in filling project; empirical method and differential settlement method were used for filling compaction quality control. The results of monitoring high embankment horizontal displacement and vertical displacement of the reference benchmark net mesh deformation shows that, embankments and vertical displacement of the surface level are small; the internal force of each point was no significant change in the basic stability of the embankment in the state.