当前位置: X-MOL 学术Arab. J. Geosci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Layout design specifications of hard-rock TBM cutterheads at maximum cutter penetration and TBM advance
Arabian Journal of Geosciences ( IF 1.827 ) Pub Date : 2021-09-22 , DOI: 10.1007/s12517-021-08435-y
Ebrahim Farrokh 1
Affiliation  

Evaluation of optimum rock cutting performance is very important, especially at the phase of the design of a tunneling machine. In this regard, existing theoretical, laboratory, numerical, or empirical methods focus only on the optimum ratio of cutter spacing over penetration, and they need further enhancements to include various design aspects of the TBM cutterhead with respect to cut and cutter geometry parameters as well as its major layout design characteristics. Field data analysis is regarded as the most accurate and reliable method in the industry as it covers various geological conditions (which is not as easy in the laboratory or numerical simulations), and it provides new practical formulas to evaluate TBM performance. To investigate the influence of various parameters on the cutter penetration and to provide a basic guideline to optimize field cutter spacing and cutterhead layout design, an extensive field database is compiled. With the use of this database, the effects of rock type and uniaxial compressive strength on cutter penetration are investigated in various categories of cutter spacing. Major layout designs of the cutterheads utilized in various rock types and different categories of tunnel sizes are investigated for projects with relatively high performance. The results of the conducted analyses show that the maximum cutter penetration in uniaxial compressive strength values below 50 and above 150 MPa is achieved close to 90 and below 80 mm, respectively. The results of the study on the layout design characteristics of the cutterhead indicate that the evenly distributed scheme is more used with success even in softer rocks (when the rock mass condition is good). In softer rocks, the extension of the openings has to be well over 50% of the cutterhead radius to maximize its performance. In this regard, some empirical formulas are generated through statistical analysis of the data from around 300 tunnel projects to evaluate both optimum cutter spacing and optimum ratio of cutter spacing over penetration. New formulas are also provided to evaluate cutterhead thrust, torque, RPM, and power. In the end, based on the discussed issues, to optimize cutter penetration and TBM cutterhead overall performance, some procedural steps are offered.



中文翻译:

最大切入深度和TBM推进时硬岩TBM刀盘布置设计规范

评估最佳岩石切割性能非常重要,尤其是在隧道掘进机的设计阶段。在这方面,现有的理论、实验室、数值或经验方法仅关注刀具间距与穿透力的最佳比率,它们需要进一步改进以包括 TBM 刀盘在切削和刀具几何参数方面的各种设计方面作为其主要的版面设计特点。现场数据分析被认为是业内最准确可靠的方法,它涵盖了各种地质条件(在实验室或数值模拟中不太容易),并且为评估TBM性能提供了新的实用公式。为了研究各种参数对刀具穿透的影响,并为优化现场刀具间距和刀盘布局设计提供基本指导,编制了一个广泛的现场数据库。使用该数据库,可以在各种类型的刀具间距下研究岩石类型和单轴抗压强度对刀具穿透的影响。针对性能相对较高的项目,研究了用于各种岩石类型和不同类别隧道尺寸的刀盘的主要布局设计。所进行的分析结果表明,在低于 50 MPa 和高于 150 MPa 的单轴抗压强度值下,最大刀具穿透分别接近 90 和低于 80 毫米。对刀盘布局设计特点的研究结果表明,即使在较软的岩石中(岩体条件良好时),均匀分布的方案也更能成功地使用。在较软的岩石中,开口的延伸必须远超过刀盘半径的 50%,以最大限度地提高其性能。对此,通过对大约300个隧道项目的数据进行统计分析,得出了一些经验公式,以评估最佳刀具间距和刀具间距与穿透的最佳比例。还提供了新公式来评估刀盘推力、扭矩、RPM 和功率。最后,基于所讨论的问题,为了优化刀具穿透和 TBM 刀盘整体性能,提供了一些程序步骤。

更新日期:2021-09-23
down
wechat
bug