竹子作为抗拉筋材加固软土路堤的应用研究

Application of bamboo as tensile reinforcement to strengthening of embankment of soft soils

目前,加筋土工程所采用的土工合成材料不是价格较高,就是无法满足环保要求。为了响应国家关于建设节约型社会的倡导,从寻找经济环保加筋材料的角度出发,简要介绍了竹子的物理力学特性和防腐方法,并在有限元软件ABAQUS中建立竹筋格栅路堤的三维模型,分析土体固结和竹筋强度衰减对路堤安全系数的影响。发现在竹筋格栅完全失效之前,土体固结作用已经可以将路堤的安全系数提高到满足规范要求,从而验证在路堤工程中用竹子代替传统土工合成材料作为抗拉筋材,力学指标和耐久性指标都能满足设计要求。

At present, the geosynthetic materials for reinforced soil engineering have higher price, and are unable to meet the requirements of environmental protection. Actively responding to the call of constructing a conservation-minded society, from the perspective of searching for economic and environmental reinforced materials, the physical and mechanical properties and antisepsis method of bamboo are introduced. A three-dimensional model for Bamboo bar grille embankment is established in ABAQUS. The soil consolidation and bamboo reinforcement strength attenuation effect on the safety factor of embankment are analyzed. It is found that the effect of soil consolidation can raise the safety factor of embankment so as to satisfy the requirements of regulation. The application of bamboo instead of the traditional geotextile materials as the tensile reinforcement is feasible in reinforced engineering, and the mechanical and durability indices can meet the design requirements.