摘要
通过收集武汉周大福金融中心中风化泥岩中的13个旁压试验测试点数据,阐述了中风化泥岩旁压试验曲线无接近极限压力PL收敛等特点;发现了中风化泥岩中P0、Pf、fa、Gm、Em等旁压参数具有随测试深度增大而增大的趋势,并对这种深度效应作了初步分析,进而提出了关于旁压试验确定的岩石地基承载力特征值fa是否需要深宽修正和如何修正的问题;同时通过旁压试验P0、Pf与压桩试验确定的桩基侧摩阻力qsia、桩端阻力qpa进行对比,探索了二者的大致关系和相关性的可能。这几点分析与思考,旨在引起武汉地区对中风化岩石旁压试验研究的关注。
By collecting the data of 13pressuremeter test points in the moderately weathered mudstones in Wuhan Chow Tai Fook Financial Center,the characteristics of the pressuremeter test curve that not approaching the limit pressure PL convergence are expounded.It is observed that P0,Pf,fa,Gm,Emand other parameters in the moderately weathered mudstone tend to increase with the increase of depth.This depth effect is also briefly analyzed in the paper.It is proposed whether the characteristic value faof rock mass bearing capacity determined by the pressuremeter test needs depth width correction and method for the correction is also provided.At the same time,by comparing the P0and Pfwith the qsiaand qpadetermined by the pile load test,the approximate relationship between them is evaluated.These analyses and reflections are intended to draw the attention of Wuhan area to the pressuremeter test in the moderately weathered rock mass.
作者
杨双乐
YANG Shuangle(Wuhan Geotechnical Engineering and Surveying Co.Ltd.,Wuhan 430022)
出处
《土工基础》
2023年第3期528-530,共3页
Soil Engineering and Foundation
关键词
中风化泥岩
旁压试验
深度效应
临塑压力
岩石地基承载力特征值
Moderately Weathered Mudstone
Pressuremeter Test
Depth Effect
Temporary Plastic Pressure
Characteristic Value of Bearing Capacity of Rock Mass
