Geocell reinforcements are proposed as a thrust countermeasure for shallowly buried pipeline bends and tees. The proposed method is easy to construct and has shorter construction time than the use of conventional concrete blocks since it does not require curing. Lateral loading tests were conducted on plates reproducing pipe bends or tees to verify their effectiveness while understanding deformation mechanisms. In addition to changing the plate width and geocell pocket size, additional experiments were conducted with different geocell reinforcement dimensions, geocell tensile stiffnesses and tensile properties of the seams. An equation for predicting the force–displacement relationship was developed as part of the proposed design method. The experimental results showed that the sides of the reinforced ground were not fully integrated when the width of the geocell reinforcement was large relative to the plate width. It was also found that the maximum force hardly decreased, although the displacement increased slightly due to the reduction of the tensile stiffness of the geocells and the tensile force at the geocell seams. Moreover, a hyperbolic approximation of the force–displacement relationship of the geocell reinforcement was developed and the calculated values agreed well with the experimental values.

中文翻译：

---

土工格室加固浅埋管道侧向力-位移关系

建议采用土工格室加固作为浅埋管道弯头和三通的推力对策。该方法易于施工，并且由于不需要养护，因此比使用传统混凝土砌块的施工时间更短。在再现弯管或三通的板上进行横向载荷测试，以验证其有效性，同时了解变形机制。除了改变板宽度和土工格室袋尺寸之外，还对不同的土工格室加固尺寸、土工格室拉伸刚度和接缝的拉伸性能进行了额外的实验。作为所提出的设计方法的一部分，开发了一个用于预测力-位移关系的方程。实验结果表明，当土工格室加筋宽度相对于板宽度较大时，加筋地面的侧面未完全一体化。研究还发现，尽管由于土工格室拉伸刚度和土工格室接缝处拉力的降低而导致位移略有增加，但最大力几乎没有减少。此外，还开发了土工格室加固力-位移关系的双曲近似，计算值与实验值吻合良好。