Optimization of the Construction Scheme for a PBA Metro Station Adjacent to an Existing Metro Tunnel北大核心CSCD

The Olympic Park Station crossing the existing Datun-Road tunnel covers a long distance and closely approaches an existing metro tunnel. Initially, the PBA construction method was adopted with eight pilot tunnels. In light of the tunnel group cavern effect and the surrounding soft silty clay with abundant water, the construction risks were very. Optimization of the metro station construction scheme was conducted, and the four pilot tunnels at the downside were cancelled and replaced with long drill hole grouting piles. Construction technology for a large-diame-ter pile for a bored pilot tunnel was adopted based on the engineering characters of the PBA method using four pilot tunnels. Monitoring on the Datunlu tunnel structure was performed during metro station construction and the results indicate that the construction scheme for the station’s main structure was rational; the new construction technology ensures construction safety for the existing tunnel and metro structure. © 2018, Editorial Office of "Modern Tunnelling Technology". All right reserved.     

深圳地铁2222标施工安全风险分析

结合深圳地铁2222标项目工程施工过程中的实际情况,分析了项目施工过程中的安全风险控制及安全保障措施,并提出了地铁施工过程中风险源的防范措施与建议。     

深圳地铁侨香站异型深基坑施工

深圳地铁2号线2222标侨香站施工区离居民区较近,地下管线纵横交错,地质情况复杂,车站外形具有端头大、中间细的特点,施工风险较大。通过采取深基坑施工及相应处理措施,保证了车站施工的质量和安全。     

地铁车站主体结构渗漏水控制

在深圳地铁2号线侨香站施工中,采取基坑结构渗漏水处理、全包柔性防水层防水、混凝土主体结构施工控制、施工缝和变形缝渗漏水处理等相应措施对地铁车站结构渗漏水进行了控制和防护,取得了良好的防水效果。     

武汉地区岩溶发育特征及地铁工程中岩溶处理

以武汉地铁岩溶专项勘察资料和地铁工程中岩溶处理案例为依据,采用综合统计方法分析岩溶发育特征和规律,总结地铁车站、区间隧道穿越岩溶区时的处理方法。研究表明武汉地区岩溶为浅层岩溶,主要在岩面以下0~15 m范围发育,表现为溶洞、溶沟、溶槽,钻孔遇洞率约50%,线岩溶率约6%,溶洞埋置越深填充率越低。岩溶区主要分为Ⅰ,Ⅱ,Ⅲ3种地质结构类型并对应高、中、低3种岩溶塌陷风险区。根据岩溶地质结构类型分类总结武汉地铁建设中采取的注浆填充、岩层注浆帷幕、土层隔离、旋喷加固及围护结构入岩等处理措施。     

地铁盾构控制测量方法探讨

结合多个城市地铁施工实例,分别从标准车站模式、换乘车站模式、始发井车站模式、区间通视、区间不通视、长区间等各种施工情况从地面控制测量、联系测量、地下控制测量、区间隧道控制测量等对盾构控制测量方法进行了探讨和经验总结,并在强制对中观测墩、主副导线点、基线控制、整体平差等方面对盾构区间控制网的布设和应用提出了独特的见解,以期为不同模式下的地铁盾构施工控制测量提供借鉴。     

全电子移频电码化驱动模块分析与应用

介绍了移频电码化信号驱动模块的组成、功能及工作原理;结合站场图,分析四显示自动闭塞区段移频电码化驱动模块的2种可用编码模式;以赛音温都日站为例,说明移频电码化驱动模块的具体应用.     

编组站综合集成自动化系统设计

分析了编组站CIPS系统管控一体化的技术特点,阐述了CIPS系统结构功能、系统集成目标及集成方案,对编组站建设具有一定的参考意义。     

An investigation into the mechanism of the out-of-round wheels of metro train and its mitigation measures

This paper presents an investigation into the mechanism of polygonal wear of metro train wheels through experiments conducted at field sites. The experiments comprise dynamic behaviour test of vehicle and track system, the wheel transverse wear and polygonal wear measurements, rail corrugation and rail weld joint irregularities’ measurements. Moreover, the numerical modal analysis of the wheelset is also performed. The wheel measurement results show that most wheels exhibit obvious eccentricity and polygonal wear with 5–8 harmonics. The investigation results indicate that the wavelength-fixing mechanism of the wheel out-of-roundness with 5–8 harmonics is the P2 resonance. Four measures have been proposed to mitigate the formation of wheel polygonal wear based on the field measurement results.     

成都地铁环控设计中系统模式比选

针对成都地区的气象条件、地铁列车运行模式、客流量等因素,重点研究开式、屏蔽门式、开/闭式和开闭混合式系统模式的可行性。采用简化的半经验法,对开式系统和屏蔽门系统中车站和隧道内的温度变化进行计算。引入活塞风通风模型,对开/闭式系统中闭式运行时的活塞风影响进行分析,并建立相应的负荷及温度分析模型。将开闭混合式系统中非空调车站内空气作为一个控制体,用能量守恒原理,分析与空调车站相邻的非空调车站内空气的温度变化。根据热力过程分析比较结果,提出适合成都地铁环控系统模式的建议。