盾构施工引起的地层分层位移测试技术研究

发布时间：2018-05-11 22:17

本文选题：盾构施工 + 分层位移　；参考：《现代隧道技术》2017年04期

【摘要】：文章基于对盾构施工引起的地层分层位移的研究分析,提出了一种适用于城市地铁均匀土层盾构施工的高精度地层分层位移的测试技术,并在北京地铁14号线盾构隧道工程中得到了应用和验证。首先,该技术利用锚固平台、静力水准仪和单点位移计组成的地层分层位移综合测试系统,实现高精度、高频率、低扰动的测量;其次,根据盾构掘进空间位置变化过程,在开挖地层均匀、掘进过程稳定的基础上,以刀盘中心为零点,建立盾构掘进动态坐标系,论证了不同深度测点地层位移转换的可行性;最后,使用多元回归分析方法对因盾构施工过程中各参数不稳定产生的差异进行排除,实现了同一竖向钻孔不同深度地层分层位移的精确监测,可有效指导盾构施工引起的沉降控制及复杂地层和环境条件下穿越工程的设计、施工及风险管控。
[Abstract]:Based on the research and analysis of stratum stratified displacement caused by shield tunneling, this paper puts forward a kind of high precision stratum stratified displacement test technology suitable for shield construction of urban subway uniform soil layer. It has been applied and verified in the shield tunneling project of Beijing Metro Line 14. First of all, the technology uses the comprehensive measurement system of stratum stratified displacement composed of anchoring platform, static level and single point displacement meter to realize high precision, high frequency and low disturbance measurement. Secondly, according to the change process of shield tunneling space position, On the basis of uniform excavation and stable tunneling process, the dynamic coordinate system of shield tunneling is established with the center of cutter head as the zero point, and the feasibility of stratum displacement conversion at different depth measurement points is demonstrated. By using the method of multiple regression analysis, the differences caused by the instability of parameters in shield tunneling are eliminated, and the precise monitoring of stratified displacement of strata with different depths of the same vertical borehole is realized. It can effectively guide the settlement control caused by shield construction and the design, construction and risk control of crossing engineering under complex stratum and environment.
【作者单位】：北京城建集团有限责任公司;中国矿业大学(北京)力学与建筑工程学院;
【基金】：国家自然科学青年基金项目(51608521) 北京市教委中央在京高校重大成果转化及产业化项目(ZDZH20141141301)
【分类号】：U455.43

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