南方水土流失防控中草袋加筋土墙的设计与施工初探

Design and Construction of Straw-bag-reinforced Mud Wall for Soil and Water Conservation in Red Soil Moutain and Hill of South China

通过福建长汀基地的草袋加筋土墙设计施工实践和研究,提出"草袋加筋土墙"用于水土保持的设计理念,阐述了草袋与内置绳组合的新结构体在整体稳定、内应力平衡等方面的理论计算模型和方法,通过试验确定内置绳拉筋的极限值及其变形对容许应力取值的关系,据此建立起拉筋锚固长度与土体咬合变形的理论关系,提出了使用本方法在使用寿命上和施工上可能遇到的问题和处理措施,确立了土墙应有的构造和形成条件,阐明了现场施工注意事项,对工程防治南方水土流失具有一定的应用价值。

Based on previous studies and practices, a new straw-bag-reinforced mud wall was designed for the soil and water conservation in Changting County, Fujian. The structure offered an improved overall stability and balanced internal stress over the conventional mud wails, according to the engineering model. From the lab experiment, the hove tendons limit and the relationship between the allowable stress and deformation were determined to establish the theoretical anchorage length for reinforcement and soil deformation occlusal. Potential problems encountered with and their countermeasures on the service life and construction of the newly designed mud wall were discussed. A blueprint for the construction and criteria of the straw-bag-reinforced mud wall are presented.