Generalized Approach for Prediction of Jet Grout Column Diameter
Generalized Approach for Prediction of Jet Grout Column Diameter
复制标题
喷射灌浆柱直径预测的通用方法
DOI：
10.1061/(asce)gt.1943-5606.0000932
复制
发表时间：
2013-12-01
影响因子：
3.9
通讯作者：
Ho, Chu-Eu
中科院分区：
文献类型：
--
作者：
Shen, Shui-Long;Wang, Zhi-Feng;Ho, Chu-Eu
摘要本文提出了一种基于湍流运动学和土壤侵蚀理论框架的喷射灌浆柱直径预测的通用方法。所提出的计算方法适用于所有传统的喷射灌浆系统，并考虑到全范围的操作参数，流体性质，土壤强度和粒度分布，包括注射时间对侵蚀距离的影响。结果表明，对于0.5-1.5 MPa的典型空气压力范围，在双流体和三流体系统中使用压缩空气护罩引起的喷射灌浆柱直径增加约为27-81%。所提出的方法应用于四个案例，涉及四种不同的喷射灌浆系统，即，单流体、双流体、三流体和增强的三流体系统。计算结果与实测结果的对比表明，该方法能够合理地计算出喷射注浆柱的直径。
AbstractThis paper presents a generalized approach for predicting the diameter of jet grout columns based on the theoretical framework of turbulent kinematic flow and soil erosion. The proposed calculation method is applicable to all conventional jet-grouting systems and takes into account the full range of operational parameters, fluid properties, soil strength, and particle size distribution, including the effect of the injection time on erosion distance. It was demonstrated that the increase in the jet grout column diameter arising from the use of a compressed air shroud in the double and triple fluid systems is approximately 27–81% for the typical range of air pressure of 0.5–1.5 MPa. The proposed method was applied to four case histories involving four variants of jet-grouting systems, i.e., single fluid, double fluid, triple fluid, and an enhanced triple fluid system. Comparison between the calculated and the measured jet grout column diameters indicated that the proposed method can produce reasonab...