哈萨克斯坦扎姆希河桥项目群桩基础特性的应用研究

Research and application on characteristics of pile group foundation of Zamshi River Bridge Project in Kazakhstan

依托哈萨克斯坦共和国国级公路第6标段中的扎姆希河跨河桥工程,采用预制群桩技术提高施工效率和质量。通过分析群桩基础不同桩长、桩间距和桩端阻力对沉降的影响,绘制荷载与沉降的关系曲线,研究预制桩基础的特性和应用。研究表明,该桥桩基设计的最优方案为桩的长径比约为20,桩间距为桩径的3.4倍,桩长9 m。

Relying on the Zamshi River Crossing Bridge project in the 6th section of the National Highway of the Republic of Kazakhstan,the prefabricated group pile technology is used to improve the construction efficiency and quality.By analyzing the effect of different pile lengths,pile spacing and pile-end resistance on the settlement of pile group foundation,the relationship between load and settlement is drawn,and the characteristics and applications of precast pile foundations are studied.The results show that the optimal design for the pile foundation of this bridge is when the length-diameter ratio of the pile is about 20,the distance between the piles is 3.5 D(D standing for diameter of the pile),and the pile length is 9 m.