Study On Highway Slope Stability Evaluation And Prevention Strategy Based On Extenics

Problems of complex high slope stability evaluation and contradictory problems in slopecontrol become increasingly serious as high-grade highway construction in mountain areas isdeveloping in our country. It becomes a consensus that these problems can’t be sloved by usingsingle discipline easily because slope engineering is complex system engineering. In order toexplore and slove these problems from a new perspective, the author introduces extensiontheory to study complex highway slope stability evaluation and processing strategy ofcontradiction problems in slope prevention. The main results of the study are as follows:(1)Integrating Highway Slope Engineering with Extenics, the definition of extensiondesign on highway slope engineering was given in this thesis, application methods of basicelement analysis principle, extension transformation principle and extension thinking mode tohighway slope design were also summarized by researching large quantity of examples, thusbuilt basic method system of extension design on highway slope engineering preliminarily.(2)Net of relationships and implication system about highway slope stability under generalconditions were established in order to provide a basic model to analyze certain slope byintegrating Highway Slope Engineering with correlation analysis principle and implicationprinciple. Net of relationships and implication system are effective assistant tools for analyzingslope stability and solutions about contradictory problems in slope control, for a certain slope,new net of relationships and implication system could be formed based on this model accordingto its actual engineering conditions and features.(3)Based on basic element theory and dependent function theory of Extenics, selectingprinciple of evaluation index in slope stability, selecting method of dependent function,determination principle of optimal point when calculating relational grade were analyzed, bythe introduction of correlation analysis and implication analysis method in extension design onhighway slope engineering, a set of comprehensive evaluation method of complex highwayslope stability as "determine slope stability grade using comprehensive relational grade, analyzeinstability mechanism using net of relationships assistantly, analyze assurance measures ofslope stability using implication system assistantly" was proposed in this thesis. This methodhas advantages of formalization, communicableness and strong logicality, etc. An effective toolwhich was formalized, expressive, methodic, and countable was provided to analyze failuremechanism of slopes and ways to keep them stable by introducing net of relationships andimplication system about slope stability.(4)Usual goals, conditions and their definition methods in highway slope control, pointsfor attention in definition of contradictory problem and its core problem were analyzed. Bycombining features of highway slope engineering, the extension strategy generating method andprocess for solving incompatibility problem, transforming bridge construction method andprocess for solving opposite problem were proposed, and conductive contradictory problems caused by correlation among basic elements after initial problem solving were also analyzed inthis thesis.(5)Correctness and operability of the forementioned slope stability evaluation method andstrategy for solving contradictory problems were verified by applying them to certainexpressway slopes in Yunnan Province. Slope stability grade was determined by calculatingcomprehensive relational grade, instability mechanism was analyzed by using method of net ofrelationships, and assurance measures of slope stability were also analyzed using implicationsystem method, these analysises had the same results as the fact. Goals, conditions and theproblem were defined about the contradictory problem in slope control, and solutions weregiven by using forementioned solving method.Extension method expresses information elements by formalized models, and leaves themunder expressive, communicable, extensionable, polymerizable and transformable circumstancethereby analyzes and solves contradictory (or creative) problems. Against the backgroundwhich new concept highway design is advocated, slope stability evaluation method and solvingmethod to contradictory problems based on Extenics have great practical value in slopeengineering on evaluating stability of complex slope scientifically, solving contradictoryproblems in slope control, and forming new design concepts, new methods, new techniques andtechnology.