Research purposes: Aims at the ground movement distribution and transformation during parallel shield tunnel construction,infections on the ground movement value due to effective factors(such as surrounding soil condition,tunnel covering thickness,clear distance and advance force etc) are also probed in.
研究目的:探明平行盾构隧道施工引起地表沉隆变位分布变化规律,及各制约因素(如围岩条件、隧道埋深、隧道净距、顶推力等)的差异对地表沉隆变位量的影响。
Several main issues such as withstand voltage correction,equipment external insulation,air clearance,creepage distance and pollution influence,are discussed in this paper by taking an example for external insulation design of Xingren converter station.
高海拔地区的直流换流站外绝缘问题是一个具有普遍意义的综合性问题,结合位于高海拔地区的兴仁换流站的外绝缘设计对高海拔地区的耐受电压修正、设备外绝缘、空气净距、爬距计算及污秽影响等多个层面对高海拔地区换流站的外绝缘问题加以讨论。
In order to research the median safety lateral clearance of expressway,the speed data of overtaking lane and respective inside clearances data of vehicles were collected on some typical sections expressways.
为了研究高速公路中间带安全侧向净距值,在具有代表性的试验路段实测了超车道上行驶车辆的行驶速度与相应的内侧净距。
Numerical simulation of construction sequence for shallow embedded bias tunnels with small clear distance;
浅埋小净距偏压隧道施工工序的数值分析
Numerical simulation of blasting control for small clear distance zone of Dongjiashan tunnel;
董家山隧道小净距段爆破控制的数值模拟
Study of mechanical behavior and reinforcing measures of middle rock wall of parallel tunnel with small interval;
双线小净距隧道中岩墙力学特征及加固措施研究
The construction of Wulong tunnel in freeway from Chongqing to Changsha is faced with cutting blasting engineering in small interval zone.
在此基础上，针对隧道净距为7～12m和4～7m两种情况，提出了小净距隧道掘进爆破的具体技术措施。
The progress in study on the optimal distance,construction technologies is presented.
通过对国内外小净距隧道合理净距的研究、对施工对策等方面的进展情况进行的分析,指出了小净距公路隧道设计施工中亟待解决的问题。