胡雄玉, 何川, 杨清浩, 吴迪. 管片衬砌配合陶粒可压缩层的支护结构与围岩相互作用模型[J]. 工程力学, 2018, 35(3): 86-95. DOI: 10.6052/j.issn.1000-4750.2016.11.0851
引用本文: 胡雄玉, 何川, 杨清浩, 吴迪. 管片衬砌配合陶粒可压缩层的支护结构与围岩相互作用模型[J]. 工程力学, 2018, 35(3): 86-95. DOI: 10.6052/j.issn.1000-4750.2016.11.0851
HU Xiong-yu, HE Chuan, YANG Qing-hao, WU Di. INTERACTION MODEL BETWEEN SEGMENT LINING MIXED WITH COMPRESSIBLE CERAMIC AND SURROUNDING ROCK[J]. Engineering Mechanics, 2018, 35(3): 86-95. DOI: 10.6052/j.issn.1000-4750.2016.11.0851
Citation: HU Xiong-yu, HE Chuan, YANG Qing-hao, WU Di. INTERACTION MODEL BETWEEN SEGMENT LINING MIXED WITH COMPRESSIBLE CERAMIC AND SURROUNDING ROCK[J]. Engineering Mechanics, 2018, 35(3): 86-95. DOI: 10.6052/j.issn.1000-4750.2016.11.0851

管片衬砌配合陶粒可压缩层的支护结构与围岩相互作用模型

INTERACTION MODEL BETWEEN SEGMENT LINING MIXED WITH COMPRESSIBLE CERAMIC AND SURROUNDING ROCK

  • 摘要: 提出了一种适用于深部蠕变地层TBM工法隧道的管片衬砌配合陶粒可压缩层的让压支护技术。通过模型试验研究了陶粒可压缩层的让压效果,在此基础上针对围岩蠕变特性和陶粒可压缩性建立了围岩、陶粒可压缩层和管片衬砌三者间相互作用的理论模型,得到了不同隧道埋深和不同厚度的陶粒填充层时围岩变形和管片衬砌支护应力随时间的变化规律,确定了深部蠕变地层确保管片衬砌长期安全的陶粒可压缩层最小填充厚度的计算方法。研究结果表明:陶粒内部蜂窝状孔隙构造使其具有高可压缩层性,可以有效地吸收围岩蠕变变形,消减管片衬砌支护压力,改善其受力特性;理论模型可以有效地分析围岩、陶粒可压缩层和管片衬砌三者间相互作用关系,对于管片衬砌壁后填充陶粒可压缩层的厚度设计具有指导作用。研究结果对未来TBM工法在深部蠕变地层修建隧道的支护结构型式设计具有一定参考价值。

     

    Abstract: A yielding technology of segment lining mixed with compressible ceramic was proposed, which is suitable for tunneling in creep stratum using TBM method. The model test is carried out to analyze the yield effect of compressible ceramic. Based on the test, a theoretical model of the interaction between surrounding rock, ceramic and segment lining was established, considering the compressibility of ceramic and creep of surrounding rock. The surrounding rock deformation and segment lining supporting pressure under different tunnel depth and ceramic thickness were obtained, also the calculation method of the minimum thickness of ceramic ensuring segment lining safety in creep stratum was obtained. The results show that the honeycomb pore structure of ceramic made to be high compressibility, which can effectively absorb the surrounding rock creep deformation and reduce segment lining support pressure, and that the theoretical model can efficiently analyze the interaction between the surrounding rock and ceramic compressible layer and segmental lining, a guiding significance for the design of ceramic thickness. The results also have a certain reference value for the design of support structures for tunneling in creep stratum using TBM method in the future.

     

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