滨海某地区桩基承载力参数优化研究  

Optimization of Pile Axial Capacity Parameters in a Coastal Area

作　　者：周培峰 ZHOU Peifeng(WSGI Engineering&Surveying Co.Ltd.,Wuhan 430080)

机构地区：[1]中冶武勘工程技术有限公司,武汉430080

出　　处：《土工基础》2023年第6期975-978,共4页Soil Engineering and Foundation

摘　　要：鉴于勘察报告中为计算桩基承载力所提供的极限侧阻力标准值、极限端阻力标准值以及岩石饱和单轴抗压强度多为理论值,故需开展多项原位测试;高应变测试是通过波动理论对单桩竖向抗压承载力和桩身完整性进行判定;静载荷试验是根据设计要求对桩基进行抗压试验,根据试验得出单桩竖向承载力,并通过埋设在桩底、桩身及桩顶的应变测量元件,测定计算桩周各土层的极限侧阻力。将滨海某工程的钻孔灌注桩试桩数据与据勘察报告提供的理论数据计算得出的单桩极限承载力标准值对比分析,并对桩基设计提出合理建议。The ultimate side friction,ultimate tip resistance and the unconfined compressive strength of the rock cores are usually provided in a typical geotechnical investigation report for the estimating of the theoretical axial pile capacity.The high strain dynamic loading test is used to determine the axial compressive capacity and the pile integrity of a single pile through wave theory.The static loading test is a compressive test conducted on piles in accordance with the design requirements.Based on the tests,the axial capacity of a single pile is obtained,and the ultimate side resistance of each soil layer around the pile is measured and calculated through strain measuring elements embedded at various locations along the shaft of the pile.The article compares and analyzes the recommended value of the ultimate axial capacity of a single pile estimated based on the theoretical data provided in the geotechnical investigation report and the actual value obtained from the test pile,based on the bored pile test in a coastal engineering project,and puts forward reasonable suggestions for pile foundation design.

关 键 词：勘察报告 高应变测试 静载荷试验 钻孔灌注桩 承载力 

分 类 号：TU473[建筑科学—结构工程]