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为研究高速公路环境与边坡填筑一体化设计关键技术,在对某高速公路段12 m高加筋边坡进行长期工作特性的现场试验研究基础上,建立考虑格栅黏弹性和土体黏弹塑性流变模型的高速公路加筋边坡数值分析模型,采用增量-初应变迭代法对各种工况进行了分析计算。通过与试验测试数据的对比,验证数值的可靠性,进而进行大量变动参数的数值分析,详细地探讨加筋边坡填筑过程中加筋结构的力学特性。在将试验数据和数值分析结果的对比分析的基础上,得到边坡加筋体内土压力、地基应力和格栅拉力分布规律及其成因,随后与类似加筋直墙和单级加筋路堤的研究结果对比,得到多级加筋陡坡的一般规律及其破坏模式。
In order to study the key technologies of integrated design of expressway environment and slope filling, based on field experiments on the long-term operating characteristics of a 12 m high reinforced slope of a expressway, Elastic-plastic rheological model of highway reinforced slope numerical analysis model, using incremental-initial strain iterative method for a variety of operating conditions were analyzed and calculated. Through the comparison with the experimental test data, the reliability of the numerical test is verified, and numerical analysis of a large number of variable parameters is carried out. The mechanical characteristics of the reinforced structure in the reinforced slope filling process are discussed in detail. Based on the comparative analysis of test data and numerical analysis results, the distribution rules and causes of earth pressure, ground stress and grating tensile force in slope reinforcement are obtained, and then compared with similar reinforced straight wall and single-stage reinforced embankment The results of the comparison, multi-level reinforced steep slope to get the general rules and failure modes.