摘要
针对挤扩多级支盘桩相对于普通等截面直孔灌注桩具有较高承载力和较低沉降量的特性,采用自平衡静载荷试验方法,对浙江湖州市某工程同一场地中的挤扩多支盘桩与普通等截面直孔灌注桩进行极限承载力的对比试验研究。工程试验结果表明,在同等工程地质条件下挤扩多支盘桩与普通直孔灌注桩相比,其极限抗压承载力和极限抗拔承载力都较大提高,每立方米混凝土的抗压承载力提高达75.3%以上,而混凝土的用量却少41.9%;单方极限抗拔承载力提高118.9%以上,而挤扩多支盘桩的混凝土用量比等少44.1%以上,且沉降曲线较缓,因此能获得较好的经济效益。该工程试验对这种新型桩的承载理论研究和类似工程实践具有客观的参考价值和借鉴意义。
Compared with column bored pile, the bored pile with branches and plates is a new type of piles with higher bearing capacity and lower settlement. Field comparative tests related to ultimate bearing capacity of both the bored piles with branches and plates and column bored piles at the same site in Huzhou city of province Zhejiang in China were studied through self- balanced method under static pressure. The results testify that, compared with column bored pile under the same geological conditions, the bored pile with branches and plates can obtain better economic benefit such as： increasing ultimate compressive bearing capacity and ultimate extraction bearing capacity used per cubic meter concrete over 75.3% and 118.9% respectively, while dropping consumption of reinforced concrete upwards of 41.9% and 44.1% respectively, reducing settlement and pile length under the same loading. The tests will present an objective reference to the new type of piles in both theoretic study and application to analogous engineering.
出处
《重庆建筑大学学报》
EI
CSCD
北大核心
2005年第5期52-56,共5页
Journal of Chongqing Jianzhu University
关键词
挤扩多支盘桩
自平衡法
极限承载力
极限抗压承载力
极限抗拔承栽力
对比试验
pile with branches and plates
self- balanced method
ultimate bearing capacity
ultimate compressive bearing capacity
ultimate extraction bearing capacity
comparative test
