软土地区双排桩冠梁刚度的计算模型  

Calculation model for crown beam stiffness of double-row piles in soft soil area

作　　者：韩鹏飞 孔令荣 季家俊 Han Pengfei;Kong Lingrong;Ji Jiajun(SGIDI Engineering Consulting(Group)Co.,Ltd.,Shanghai 200092,China)

机构地区：[1]上海勘察设计研究院(集团)股份有限公司,上海200092

出　　处：《工程勘察》2024年第10期23-28,共6页Geotechnical Investigation & Surveying

摘　　要：双排桩组合体系作为一种新型的挡土结构,因其较大的抗侧刚度得以在长三角等软土地区得到越来越多的应用,但该体系设计计算时冠梁刚度的取值尚未明确,从而制约其进一步的发展。本文通过基于经典力学理论和基于数值模拟两种计算模型下冠梁刚度随截面尺寸、排距和开挖长度的变化规律,从而提出一种适用于软土地区双排桩的冠梁刚度取值方法。该方法吸取了经典力学理论计算方便和数值模拟接近实际开挖状况的特点,并通过与实际工程案例的对比分析,验证了该计算方法的合理性和实用性。As a new type of soil retaining structure,the double-row pile composite system has been applied more widespread in Yangtze River Delta and other soft soil areas because of the stronger lateral stiffness.However,the value of crown beam stiffness is not clear in the designing of the system,which restricts its further development.Based on classical mechanics theory and numerical simulation,the stiffness varies of crown beam with the section,row distance and excavation length,a calculation model for crown beam stiffness is proposed which is applicable to soft soil areas.The method absorbing the characteristics of the classical mechanics theory and the numerical simulation is close to the actual excavation condition,and the rationality and practicability of the calculation method are verified by the comparison and analysis with actual engineering cases.

关 键 词：双排桩组合体系 冠梁刚度 经典力学 数值模拟 计算方法 

分 类 号：TU473[建筑科学—结构工程]