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高压旋喷桩施工对相邻既有高速桩基的影响分析 被引量:1

RESEARCH ON THE INFLUENCE OF HIGH PRESSURE ROTARY JET PILE CONSTRUCTION ON EXPRESSWAY PILE FOUNDATION
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摘要 高压旋喷桩是一种常见的地基处理方法,但会对周围土体和既有构筑物造成影响。文中以道路下穿高速公路桥梁段实际工程为例,采用圆孔加荷方法和土弹簧刚度m法分析了高压旋喷桩施工对桥梁桩基变形、内力的影响,并分析了施工对桩基承载力和沉降的影响,结果表明高压旋喷桩施工将导致桥梁桩基桩顶产生较大横向位移,超过高速桥梁的变形限值,同时高压旋喷桩施工将降低桥梁桩基竖向承载力,导致桩基沉降,影响桥梁上部结构。根据分析提出了针对桥梁的保护措施,为桥梁工程安全提供保障。 High-pressure jet grouting pile is a common method of ground treatment,but it often affects the surround⁃ing soil and existing structures.Taking the actual project as the case,this article analyzes the impact of high-pres⁃sure jet grouting pile construction on the deformation and internal forces of the bridge pile foundation using the meth⁃od of circular hole loading and soil spring stiffness method.It also analyzes the impact of construction on the bearing capacity and settlement of the pile foundation.The results show that high-pressure jet grouting pile construction leads to a large lateral displacement of the pile top of the bridge pile foundation,exceeding the deformation limit of the highway bridge.At the same time,high-pressure jet grouting pile construction reduces the vertical bearing ca⁃pacity of the bridge pile foundation,resulting in pile foundation settlement and affecting the upper structure of the bridge.Based on the analysis,this article proposes protective measures for the bridge,aiming to provide security for bridge engineering.
作者 刘新峰 刘斌 LIU Xinfeng;LIU Bin(Guangdong Hualu Transport Technology Co.,Ltd.,Guangzhou 510420,China)
出处 《低温建筑技术》 2023年第12期144-148,共5页 Low Temperature Architecture Technology
关键词 高压旋喷桩 高速桥梁 桩基位移 high-pressure rotary jet pile high-speed bridge pile foundation displacement
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