土体强度对土钉墙设计参数及经济性影响分析

针对目前土钉墙设计参数进行优化设计只是在给定土体强度下进行的,且其优化算法仍有些缺陷,而在不同粘聚力c、内摩擦角φ下,研究分析土钉墙参数选取及经济性也具有重要的理论和实际意义。从不同土体强度出发,以单位墙长土钉墙工程造价为目标函数,按规范要求设置约束条件,建立了不同土体强度对土钉墙设计参数及经济性影响的计算模型,并应用嵌套的改进的遗传算法求解,得到土体强度与土钉墙设计参数、土体强度与土钉墙经济性的关系曲线,并对其计算结果进行分析。所得结论可为土钉墙参数设计选取及经济性分析提供理论支持。

Analysis on Design Parameters and Economy of Soil Nailing Wall Influenced by Soil Strength

Parameters selection and economy of soil nailing wall would be comprehensively analyzed under different cohesive force c and angle of internal friction φ, which can contribute to engineering design and theoretical research. However, the research for the optimization of soil nailing wall design parameters is carried out only under the permanent strength value of soil at present, they cannot meet the requirement of engineering practice. Furthermore, in the optimization algorithm there are also some imperfection. Taking different soil strength, a calculation model was established to analyze design parameters and economy of soil nailing wall, the construction cost was used to build objective function and the constraint condition was set according to the soil nail specification. A new way, the nested and modified Genetic algorithm was proposed to solve the problem. Through the way given above, the relative curve of the soil strength with the parameters of the soil nail wall, as well as the relationship between the soil strength and the economy of the soil nail wall were obtained in this paper. The conclusion can offer theoretical support for parameters selection and economic analysis of soil nailing wall.