杨润基¹ , 卢许佳¹ , 高    庆²  , 谭维佳³

( 1. 中国水利水电第七工程局有限公司 ，四川 成都 611730;

2. 中铁三局集团有限公司 ，四川 成都 611730;

3. 长安大学地质工程与测绘学院 ，陕西 西安710054)

摘   要： 鉴于湿陷性黄土在轨道工程中的影响研究较为缺乏，本文以太原地铁 1 号线土建 7 标为工程依托，开展黄土湿陷性浸水现场试验，在总结分析相关工程经验的基础上提出合理处置方案，并采用ANSYS 对所选方案进行数值模拟验证。研究结果表明： 工程场地为Ⅱ级中等湿陷场地且无剩余湿陷量； 经比选，针对车站，部分采用整体下压 3 m , 主体底板下黄土层采用三七灰土换填，附属基坑采用坑内灰土挤密桩处理，过街通道采用暗挖洞内微型桩处理； 针对区间隧道，盾构工法洞内注硅化浆液处理（ 单液硅化法）为最优处置方案； 数值计算结果表明微型桩处理方案可以满足要求。所得结论对今后类似工程设计与施工具有重要的参考和借鉴价值。

关键词： 轨道工程； 湿陷性黄土； 浸水试验； 处置方案； 数值模拟

中图分类号： TU473      

文献标志码： A  

文章编号： 1005-8249 (2023) 05-0033- 10

DOI : 10. 19860/j.cnki.issn1005-8249.2023.05.006

YANG Runji¹ , LU Xujia¹ , GAO Qing² , TAN Weijia³

( 1. SINOHYDRO BUREAU 7 Co. ，Ltd. ，Chengdu 611730 , China;

2. China Railway Third Bureau Group Co. ，Ltd. ，Chengdu 611730 , China;

3. School of Geological Engineering and Surveying and Mapping , Chang ’an University , Xi ’an 710054 , China) 

Abstract: In view of the lack of research on the influence of collapsible loess in track engineering, based on the project of civil engineering bid 7 of Taiyuan Metro Line 1, this paper carries out loess collapsible flooding field test, puts forward a reasonable treatment scheme on the basis of summarizing and analyzing relevant engineering experience, and uses ANSYS to verify the selected scheme by numerical simulation. The research results show that the engineering site is a grade Ⅱ medium collapsible site with no residual collapsibility; after comparison and selection, for the station, part of the whole pressure is 3m, the loess layer under the main floor is replaced by Panax notoginseng lime-soil, and the auxiliary foundation pit is treated with lime-soil compaction pile in the pit. The street passage is treated with micro piles in the underground excavation tunnel; for the interval tunnel, the silicification slurry treatment (single liquid silicification method) is the best disposal scheme. The numerical results show that the treatment scheme of micro-pile can meet the requirements. The conclusion has important reference value for the design and construction of similar projects in the future.

Keywords：rail transit engineering; collapsible loess; flooding test; disposal scheme; numerical simulation

∗ 基金项目：国家自然科学基金项目( No. 51774166) 。

作者简介：杨润基(1990—) , 男，本科，工程师，主要从事铁路施工技术管理工作。 

通信作者：卢许佳(1985—) , 男，本科，高级工程师，主要从事工程施工管理工作。 

收稿日期：2022-07-31