黄土盾构隧道膨润土泥浆渣土改良技术研究

贺斯进

doi:10.3973/j.issn.1672-741X.2012.04.003

隧道建设 >

2012 , Vol. 32 >Issue 4: 448 - 453

DOI: https://doi.org/10.3973/j.issn.1672-741X.2012.04.003

研究与探索

黄土盾构隧道膨润土泥浆渣土改良技术研究

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（广州地铁设计研究院有限公司，广州 510010）

贺斯进（1971—），男，四川乐至人，1995年毕业于西南交通大学隧道及地下工程专业，本科，高级工程师，国家一级注册结构工程师，从事地铁及地下空间开发等结构设计工作。

收稿日期: 2012-06-04

修回日期: 2012-07-12

网络出版日期: 2012-10-16

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Study on Grounding Conditioning by Bentonite Slurry in Shield Tunneling in Loess Strata

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（Guangzhou Metro Design & Research Institute Co., Ltd., Guangzhou 510010, China）

Received date: 2012-06-04

Revised date: 2012-07-12

Online published: 2012-10-16

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摘要

为了解决黄土地层中土压平衡盾构施工地铁区间隧道时出现的出土困难、土仓压力难以建立以及刀具温度过高等问题，采用膨润土、泡沫对渣土进行改良才能保证盾构掘进效果。采用正交试验法进行了膨润土泥浆优化试验与泡沫优化试验。通过膨润土泥浆优化试验找到了适合黄土地层的膨润土改良剂及膨润土泥浆的最优体积分数。通过泡沫优化试验找到了泡沫性能与发泡剂溶液最佳体积分数的关系，本文研究成果在实际工程中得到了成功应用，以期为类似工程提供借鉴与参考。

关键词： 盾构隧道; 黄土; 膨润土; 渣土改良; 泡沫剂; 泥浆配比

本文引用格式

贺斯进 . 黄土盾构隧道膨润土泥浆渣土改良技术研究[J]. 隧道建设, 2012 , 32(4) : 448 -453 . DOI: 10.3973/j.issn.1672-741X.2012.04.003

Abstract

When EPB shield bores in loess strata, the muck conveying is difficult, the pressure in the excavation chamber is difficult to be established and the temperature of the cutting tools is very high. In this case, ground conditioning by grounding conditioning agents, such as bentonite, is needed so as to ensure successful shield boring. Bentonite slurry optimization test and foam optimization test are made by means of orthogonal test. The optimum concentration of the bentonite conditioning agent and bentonite slurry suitable for loess strata is obtained by means of bentonite slurry optimization test; the relationship between the foam performance and the optimum concentration of the foaming solution is obtained by means of foam optimization test. The paper can provide reference for similar projects in the future.

Key words： shieldbored tunnel; loess; bentonite; ground conditioning; foaming agent; slurry mixing ratio

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