大粒径卵漂石地层盾构破岩机理及工程应用

发布时间：2018-04-13 09:01

本文选题：盾构隧道 + 大粒径卵漂石地层　；参考：《土木工程学报》2017年02期

【摘要】：盾构法在地下工程中应用广泛,但其技术系统具有极强的地层适应性差异,需要针对特殊地层进行专门设计。大粒径卵漂石地层是盾构法的世界禁区,迄今为止,国内外适用该种地层的技术系统和成功的工程案例较少。根据大粒径卵漂石地层的力学特征及空间分布规律,采用理论分析与现场验证相结合的手段与方法,系统研究重型刀具与大粒径卵漂石的相互作用机理及盾构开挖过程中刀具与地层的能量传递原理,基于能量原理提出重型刀具的劈裂破岩机理。基于应力波传播理论及黎金格新表面理论,提出盾构在富含超大粒径卵漂石地层中的破岩机理——阻尼环境下重型刀具锤击劈裂破岩;相应推导破岩所需的最小扭矩,为盾构机刀盘装备扭矩选取提供依据;在北京地铁九号线06标"军事博物馆站—东钓鱼台站"盾构区间工程中得到验证,并获得成功应用。研究结果对指导盾构选型、盾构隧道施工及反馈设计具有重要理论与实际意义。
[Abstract]:Shield method is widely used in underground engineering, but its technical system has strong adaptability difference, so it needs to be specially designed for special strata.The large size egg bleach stratum is the forbidden zone of shield method in the world, so far, there are few technical systems and successful engineering cases for this kind of stratum at home and abroad.According to the mechanical characteristics and spatial distribution of large size egg bleach strata, the method of combining theoretical analysis with field verification is adopted.The interaction mechanism between heavy tool and large size egg bleach and the principle of energy transfer between cutting tool and stratum during shield tunneling are studied systematically. Based on the energy principle, the splitting rock mechanism of heavy tool is put forward.Based on the theory of stress wave propagation and the new surface theory of Lijingge, it is proposed that the rock breaking mechanism of shield tunneling in the stratum rich in super-large size egg bleach is hammering and splitting rock breaking with heavy tool, and the minimum torque required for rock breaking is deduced accordingly.It provides the basis for the torque selection of shield machine cutter gear, and is verified and successfully applied in the shield section project of "military Museum Station-DongDiaoyutai Station" marked 06 of Beijing Metro Line 9.The research results have important theoretical and practical significance for guiding shield type selection, shield tunnel construction and feedback design.
【作者单位】：北京城建集团有限责任公司;中国矿业大学(北京);
【基金】：国家自然科学青年基金(U1261212) 北京市教委重大成果转化及产业化项目(ZDZH20141141301)
【分类号】：U455.43

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