高喷桩体直径的估算  

Estimation on the diameter of high pressure jet grouting pile

作　　者：魏茂杰[1] 

机构地区：[1]山东省水利科学研究院灌浆技术研究所,山东济南250013

出　　处：《人民长江》2002年第1期43-44,共2页Yangtze River

摘　　要：阐述了高压射流破坏土的机理 ,影响喷射直径的主要因素有 :土粒组成、土的强度、喷射介质的压力、提升速度、喷射管的转动频率、摆动角度、喷射介质的种类等。对大量的实测资料进行了统计分析 ,得出了砂土地层中采用三管法施工的喷射直径与喷射管的提升速度、摆动角度、喷射压力、土层强度等主要影响因素的估算公式。应用这些估算公式可显著提高设计的合理性和精确度。This paper describes the damage mechanism of soil by high pressure jet flow.The main factors influencing the diameter of jetted pile include the composition and the strength of soil,the pressure of jetting medium,the lifting velocity,the rotating frequency and the oscillating angle of jetting pipe,the kinds of jetting medium etc.Through the statistic analysis on large amount of measured data,the estimation formulas of diameter (constructed by 'three pipes' method) with influencing factors,such as the lifting velocity and oscillating angle of jetting pipe,jetting pressure,soil strength etc,are obtained.The application of these empirical formulas can significantly improve the reasonability and accuracy in design.

关 键 词：喷射直径 统计 高压喷射灌注 桩 防渗 加固 

分 类 号：TV223.22[水利工程—水工结构工程]