论文部分内容阅读
随着城市化进程的推进,地下空间的开发和利用越来越受到人们的重视。管幕法作为一种有效的暗挖支护方式,越来越多的用于城市地下工程开挖施工。管幕施工中常用的技术主要有顶管法和夯管法。管幕施工造成的地层位移会对周围环境产生影响。探讨了管幕施工对地层的挤土扰动对环境的影响。考虑土体的剪胀特性和塑性变形,推得了在管挤入过程中周围土体内的位移场和应力场表达式,利用叠加法推导了管幕夯进引起的土体位移的理论解,研究了地层竖向位移对土层参数、初始应力、埋深等参数的敏感性,并分析了管间距和管的布置形式对管幕引起土体位移的影响。
With the progress of urbanization, more and more attention has been paid to the development and utilization of underground space. Pipe curtain method as an effective method of undercutting support, more and more used in urban underground engineering excavation. Pipe curtain construction commonly used techniques are mainly pipe jacking method and rammer pipe method. The displacement of the formation caused by pipe curtain construction will have an impact on the surrounding environment. The influence of tube curtain construction on the disturbance of the soil compaction to the environment was discussed. Taking into account the dilatancy characteristics and plastic deformation of soil, the displacement field and stress field expression in the surrounding soil are deduced. The theoretical solution to the soil displacement caused by pipe-wall compaction is deduced by using the superposition method. The sensitivity of vertical displacement to the parameters of soil layer, initial stress and depth of buried soil was also analyzed. The effects of pipe spacing and pipe layout on soil displacement caused by pipe curtain were analyzed.