摘要：The layout of the buckets for tunnel boring machine(TBM)directly affects the muck removal efficiency of cutterhead during *** order to improve the muck removal performance for TBM,the optimal design of bucket layout was *** whole muck transfer process was simulated by discrete-element method(DEM),including the muck falling,colliding,pilling up,shoveling and transferring into the *** muck model was established based on size distribution analysis of muck samples from the water-supply tunnel project in Jilin Province,***,the influence of the bucket number and the interval angle between buckets on muck removal performance was *** results indicated that,as the number of buckets increased from four to eight,the removed muck increased by 29%and the residual volume decreased by 40.5%,and the process became *** interval angles between buckets were corresponding to different removed muck irregularly,but the residual muck number increased generally with the *** optimal layout of buckets for the cutterhead in this tunnel project was obtained based on the simulation results,and the muck removal performance of the TBM was verified by the actual data in the engineering construction.

摘要：Geological adaptability matching design of a disc cutter is the prerequisite of cutter head design for tunnel boring machines(TBMs)and plays an important role in improving the tunneling efficiency of *** main purpose of the cutter matching design is to evaluate the cutter performance and select the appropriate cutter *** this paper,a novel evaluation method based on multicriteria decision making(MCDM)techniques was developed to help TBM designers in the process of determining the cutter *** analytic hierarchy process(AHP)and matter element analysis were applied to obtaining the weights of the cutter evaluation criteria,and the fuzzy comprehensive evaluation and technique for order performance by similarity to ideal solution(TOPSIS)approaches were employed to determine the ranking of the cutters.A case application was offered to illustrate and validate the proposed *** results of the project case demonstrate that this method is reasonable and feasible for disc cutter size selection in cutter head design.

摘要：刀盘是TBM的核心部件,其强度的分析校核是刀盘结构设计的必要环节。为对比分析不同刀盘肋板厚度对刀盘强度的影响,设计了三种不同肋板厚度的TBM刀盘。建立了三种刀盘的有限元分析模型,并在三种工况下,对三种TBM刀盘进行了位移与应力的对比分析。得到了不同工况下刀盘肋板厚度变化与刀盘最大位移和应力的关系,结果表明:刀盘肋板厚度越大,刀盘结构最大位移和最大应力越小;在偏载工况下刀盘的刚度与强度特性最差。

摘要：为了研究大直径竖井掘进机刀盘结构的合理性,对刀盘的结构强度、刚度以及疲劳寿命进行了分析。将刀盘施工作业分为额定工况、正常掘进工况和极限工况,利用ANSYS软件对其进行静力学分析和疲劳寿命分析。分析结果表明:极限工况下的刀盘最易发生失效,该工况下的刀盘最大应力为44.26 MPa,最大变形为0.76 mm,最短疲劳寿命为1.98×10^(3)次,满足刀盘强度、刚度和疲劳寿命的设计要求。

摘要：针对地下水流动性较强地层的盾构机进仓作业难题,提出通过冷冻法加固地层,以实现常压进仓作业。面向冷冻法常压进仓作业需求,从安全性、可靠性、经济性角度分析了常压刀盘的优势,对盾构机主机、刀盘刀具、盾体、人仓系统等进行了适应性的选型设计,并通过盾构实际开仓作业情况验证了所提出方法的正确性。

摘要：针对城铁花桥站—光夏路站盾构工程中出现的漏浆漏沙现象,对洞内更换盾尾刷技术进行具体的阐述,详细介绍了盾尾封堵、拼装机工装安装、盾尾刷更换等流程中的技术要点,对盾尾刷损坏的原因与防护措施进行分析和总结。

摘要：数字化相位生成载波(PGC)方法是实现光纤干涉仪大动态范围、高精度信号检测的主要手段。为了实现一个实用系统,必须对该方法的各种参数进行深入研究。以非平衡干涉仪为基础,推导了数据采集单元和相位生成载波方法相关参数及待测信号参数之间的关系,提出了抗混叠滤波器的设计方法,给出了实验结果,实现了高精度相位生成载波数字解调系统的设计。