基于圆形断面自由紊动射流理论的旋喷桩直径计算方法

王志丰; 沈水龙; 许烨霜

基于圆形断面自由紊动射流理论的旋喷桩直径计算方法 English Version

王志丰^1,2,
沈水龙^1,2,
许烨霜^1,2

(1. 上海交通大学土木工程系，上海 200240；2. 国家海洋工程重点试验室，上海 200240)

详细信息

作者简介:
王志丰(1986– )，男，河南安阳人，博士研究生，主要从事地基处理、地下工程方面的研究。

中图分类号: TU473.1
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出版历程
- 收稿日期: 2011-11-24
- 发布日期: 2012-11-13

An approach to calculate diameter of jet-grouted columns based on turbulent flow theory

(1. Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; 2. State Key Laboratory of Ocean Engineering, Shanghai 200240, China)

摘要

摘要: 基于圆形断面自由紊动射流理论，提出了一种新的高压旋喷桩直径计算方法。考虑高压旋喷技术的施工过程，旋喷桩直径主要与施工场地的土性条件以及施工时的旋喷参数有关。从高压旋喷技术机理来看，高压水或水泥浆对土体的切割作用会产生一个切割距离，考虑工程实际的需要，该切割距离可以认为基本等于旋喷桩半径，通过对圆形断面紊动射流和土体破坏的联合分析，建立了旋喷桩半径、土性条件以及旋喷施工参数之间的关系。最后通过与现场实测数据的对比验证了该计算方法的实用性。
- 旋喷桩 /
- 射流 /
- 直径 /
- 预测方法
Abstract: Based on the theory of turbulent kinematic flows, a simple approach to predict the diameter of jet-grouted column is proposed. Considering the process of jet grouting, the diameter of the jet-grouted columns is related to in-situ properties of soil and the jetting parameters adopted during construction. Since the fluid with high speed is jetted out from a nozzle to erode the soil during jet grouting, and there exists an erosion distance produced in the soil, the diameter can be estimated from this erosion distance. Through the analysis of free jet from a round nozzle and soil erosion, the erosion distance is obtained. Thus, the relationship among column diameter, jet parameters and soil properties can be established. Moreover, comparison between the predicted results and the data from literatures are also presented, and the results are classified according to the different soil types, which suggests that the proposed method is applicable for most soil types.
- jet-grouted column /
- jetting fluid /
- diameter /
- prediction method

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参考文献(10)

[1]	徐至均, 全科政. 高压喷射注浆法处理地基[M]. 北京: 机械工业出版社, 2004. (XU Zhi-jun, QUAN Ke-zheng. Ground improvement with jet grouting method[M]. Beijing: China Machine Press, 2004. (in Chinese))
[2]	CROCE P, FLORA A. Analysis of single fluid jet-grouting[J]. Géotechnique, 2000, 50(6): 739–748.
[3]	SHIBAZAKI M. State of practice of jet grouting[C]// Grouting 2003: Grouting and Ground Treatment, ASCE, Florida, 2003: 198–217.
[4]	刘沛清. 自由紊动射流理论[M]. 北京: 北京航空航天大学出版社, 2008. (LIU Pei-qing. Theory of turbulent kinematic flow[M]. Beijing: Beihang University Press, 2008. (in Chinese))
[5]	HO C E. Fluid-soil interaction model for jet grouting[C]// Geo-Denver 2007: New Peaks in Geotechnics, ASCE, Colorado, 2007: 1–10.
[6]	DABBAGH A A, GONZALEZ A S, PENA A S. Soil erosion by a continuous water jet[J]. Soils and Foundations, 2002, 42(5): 1–13.
[7]	SHEN S L, LUO C Y, XIAO X C, et al. Improvement efficacy of RJP method in Shanghai soft deposit[C]// Advances in ground improvement: research to practice in the united states and China, ASCE, Florida, 2009: 170–178.
[8]	MODONI G, CROCE P, MONGIOVI L. Theoretical modelling of jet grouting[J]. Géotechnique, 2006, 56(5): 335–347.
[9]	HO C E. Analysis of deep jet grouting field trial in clay[C]// Contemporary Topics in Ground Modification, Problem Soils, and Geo-Support, ASCE, Florida, 2009: 233–240.
[10]	DURGUNOGLU H T, KULAC H F, ORUC K, et al. A case history of ground treatment with jet grouting against liquefaction for a cigarette factory in Turkey[C]// Grouting and Ground Treatment, ASCE, Louisiana, 2003: 1–12.

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基于圆形断面自由紊动射流理论的旋喷桩直径计算方法 English Version

作者简介: 王志丰(1986– )，男，河南安阳人，博士研究生，主要从事地基处理、地下工程方面的研究。

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出版历程

An approach to calculate diameter of jet-grouted columns based on turbulent flow theory

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出版历程

目录

作者简介:
王志丰(1986– )，男，河南安阳人，博士研究生，主要从事地基处理、地下工程方面的研究。