卵石地层土压平衡盾构施工土体改良试验研究

姜厚停; 龚秋明; 杜修力

卵石地层土压平衡盾构施工土体改良试验研究 English Version

北京工业大学城市防灾与减灾教育部重点实验室，北京 100124

基金项目: 北京市教育委员会科技计划面上项目（KM200910005010）

详细信息

作者简介:
姜厚停（1981– ），男，山东临沭人，博士研究生，从事岩土工程、地下工程等领域的研究工作。E-mail: jianghouting@emails.bjut.edu.cn

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- 文章访问数: 990
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出版历程
- 收稿日期: 2012-06-07
- 发布日期: 2013-03-06

Experimental study on soil conditioning in cobble layer by use of earth pressure balanced machine

Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China

摘要

摘要: 卵石地层摩擦性高，塑流性差，在土压平衡盾构施工过程中遇到了许多困难，通过对其进行土体改良改善土层性能成为不可缺少的辅助施工措施。但是，卵石地层土体改良缺乏系统研究，添加剂配比多依靠工地摸索或工程经验，容易造成添加剂使用不合理，直接影响到盾构施工效率。为此以北京地铁10号线2期隧道区间卵石地层土压平衡盾构施工为案例，进行了一系列土体改良室内试验，研究、评价常用添加剂及改良渣土性能，得到理想改良渣土的添加剂配比参数为泡沫注入比为30%，泥浆注入比为10%，最佳坍落度范围为150～200 mm。利用上述添加剂配比方案进行了盾构掘进试验，显著提高了盾构施工效率。试验结果可为类似地层盾构施工土体改良提供参考。
- 土压平衡盾构机 /
- 土体改良 /
- 室内试验 /
- 掘进试验 /
- 卵石地层
Abstract: Many difficulties are encountered during EPB tunnelling through the cobble layer because of high soil friction and low flow characteristics. In order to solve these problems, soil conditioning with additives has become an indispensable practice to enhance the properties of the soil and make the soil suit for the machine. However, the researches on soil conditioning are limited to an extent, and the use of conditioning additives is often based on trial and errors at the work site or the workers' experience. The soil conditioning for EPB excavation in the cobble layer of the 2nd-stage project of Beijing Metro No. 10 is studied, a series of laboratory tests are performed to investigate and assess the properties of additives and conditioned soils. The optimum injection ratios of additives (foam injection ratio of 30%, slurry injection ratio of 10%, and the optimum slump value of 150～200 mm), which are obtained by laboratory tests, are applied to the penetration tests. The comparative analysis of excavation parameters before and after penetration tests shows that the optimum injection ratios of additives significantly improve the performance of EPB machine. The results can be used to provide guidelines for the excavation by use of EPB machine under such soil conditions.
- earth pressure balanced machine /
- soil conditioning /
- laboratory tests /
- penetration test /
- cobble layer

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参考文献(25)

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文章访问数: 990
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卵石地层土压平衡盾构施工土体改良试验研究 English Version

作者简介: 姜厚停（1981– ），男，山东临沭人，博士研究生，从事岩土工程、地下工程等领域的研究工作。E-mail: jianghouting@emails.bjut.edu.cn

计量

出版历程

Experimental study on soil conditioning in cobble layer by use of earth pressure balanced machine

计量

出版历程

目录

作者简介:
姜厚停（1981– ），男，山东临沭人，博士研究生，从事岩土工程、地下工程等领域的研究工作。E-mail: jianghouting@emails.bjut.edu.cn