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Deeply cracked highway construction process fault rock slope behavior

Author: ZhangHua
Tutor: LuYang
School: Southwest Jiaotong University
Course: Road and Railway Engineering
Keywords: High rock slope Numerical Simulation Element coupling Bolt ( Cable ) Frame Beam Dynamic Monitoring System
CLC: U416.14
Type: Master's thesis
Year: 2007
Downloads: 180
Quote: 3
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Abstract


In this paper, the West Panzhihua Expressway K132 fragmentation fault rock high slope , the use of numerical simulation and field monitoring methods , its excavation and consolidation process state changes for a more systematic and thorough study focuses on are: ( 1 ) combined with field survey data , terrain slope and geological data , the use of large-scale commercial finite element software ANSYS8.0 establish K132 West slope climbing speed three-dimensional finite element model , according to the site and drilling geological conditions , the slope reasonable partition , then the finite element mesh format to import information into geotechnical engineering software FLAC 3D , and the resulting rock rock mechanics test based on the parameters of the material to determine the model parameters . ( 2 ) using FLAC 3D of slope excavation stability. One-dimensional and three-dimensional elastic-plastic plastic anchor bolt unit cell and three-dimensional linear elastic beam element coupling method , simulation Slope Engineering anchor frame , Prestressed framework and their interaction with the rock reinforcement , then on the West Panzhihua Expressway K132 high rock slope reinforcement program evaluation conducted comparison . The results show that , with the anchor frame beam similar frameless anchor reinforcement scheme capable of shallow slope displacement and stress field has improved, different, anchor frame can significantly limit the slope surface deformation ; Prestressed framework and prestressed anchor cable layout design value in a wide range significantly affect internal slope displacement and stress field distribution . Therefore, the prestressed anchor frame beam program is to improve the K132 high rock slope stability is one of the preferred method . ( 3 ) on the K132 high slope deformation of the construction process and stabilize the dynamic monitoring . The results showed that: the natural state K132 slope slope stress field mainly with the ambient temperature changes , and the impact of limited depth , even if the construction process due to tensile stress field anchor the slope changes , the changes also occurred only after the tensioning a shorter period of time . Combined with deep displacement monitoring inclinometer that slope excavation and blasting activities and artificial rainfall and other natural factors will produce a certain slope K132 disturbance , but timeliness is not significant, the overall stability of the slope .

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CLC: > Transportation > Road transport > Road works > Roadbed, pavement engineering > Subgrade > Slope
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