| 施有志.厦门地区孤石分布规律及对地铁工程的影响[J].地质与勘探,2019,55(3):862-869 |
| 厦门地区孤石分布规律及对地铁工程的影响 |
| The distribution rule of the solitary stones of granite in Xiamen and its influence on metro construction |
| 投稿时间：2018-02-24 修订日期：2018-05-16 |
| DOI：10.12134/j.dzykt.2019.03.018 |
| 中文关键词: 厦门地铁 花岗岩球状风化体 孤石 分布规律 统计分析 盾构施工 |
| 英文关键词: Xiamen metro, globular weathered body of granite, boulder, distribution discipline, statistical analysis, shield construction |
| 基金项目:厦门市科技计划项目(编号：3502Z20183043)资助 |
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| 中文摘要: |
| 厦门地区的花岗岩地层中发育了大量的球状风化体（俗称孤石），对地铁工程的建设产生了不利的影响。通过对厦门地铁一号线、二号线进行钻探及室内试验研究，根据揭示的孤石进行统计分析，并分析对地铁工程的影响。研究表明：厦门地区花岗岩孤石埋深主要集中在0~20m之间；89%的孤石厚度不超过4m；近半数孤石分布于强风化层；其饱和抗压强度主要集中在40~45MPa和90~100MPa，天然抗压强度集中在45~50MPa和100~110MPa；地铁施工时孤石可能会导致盾构机损坏和姿态失控。 |
| 英文摘要: |
| A large number of spherical weathered rock bodies (commonly known as the “boulder”) have developed in the granite stratum in the Xiamen area, which has adversely affected the construction of subway construction. Based on drilling and laboratory tests of Xiamen Metro Line 1 and Line 2, this paper makes a statistics of the exposed boulders, and analyzes its influence on the subway project. The results show that the buried depth of granite boulders in the Xiamen area is mainly between 0~20m; the thickness of 89% boulders is no more than 4m; nearly half of which are distributed in the strongly weathered layer. The saturated compressive strength of these boulders concentrates at 40~45MPa and 90~100MPa, and their natural compressive strength concentrates at 45~50MPa and 100~110MPa. These boulders may lead to the damages of shield machines and the out of control of their postures. |
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