极浅埋富水砂层地铁横通道注浆加固与开挖稳定性
发布时间：2019-02-16 22:02
【摘要】：针对极浅埋富水砂层地铁隧道横通道可能出现的施工安全问题,采用室内实验、理论分析及数值模拟的方法,对隧道进行注浆加固试验及开挖工法的优选,提出一套适用于浅埋富水砂层横通道的注浆加固工艺及开挖工法。认为注浆加固可有效提高砂层的物理力学参数和土体力学性能;支护时间越迟,围岩变形越大,预加固可有效提高围岩的物理力学参数,降低围岩变形,改善地层的应力—应变关系;对台阶法与CRD(交叉中隔墙法)法开挖后拱顶沉降、应力及塑性区分布特征进行了对比分析,通过现场开挖监测量控与数值分析的对比,验证了该工艺的可行性,该研究可为类似工程提供一定的借鉴和指导作用。
[Abstract]:In view of the possible safety problems in the cross passage of the underground tunnel in the extremely shallow water-rich sand layer, the method of laboratory experiment, theoretical analysis and numerical simulation is adopted to carry out the grouting reinforcement test and the optimization of the excavation method for the tunnel. This paper presents a set of grouting reinforcement technology and excavation method suitable for cross passage of shallow water rich sand layer. It is considered that grouting reinforcement can effectively improve the physical and mechanical parameters of sand layer and the mechanical properties of soil. The later the supporting time, the bigger the surrounding rock deformation. Pre-reinforcement can effectively improve the physical and mechanical parameters of the surrounding rock, reduce the surrounding rock deformation, and improve the stress-strain relationship. The characteristics of settlement, stress and plastic zone distribution of arch after excavation by step method and CRD method are compared and analyzed. The feasibility of this process is verified by comparison of field excavation monitoring quantity control and numerical analysis. This study can provide some reference and guidance for similar projects.
【作者单位】： 中铁工程设计咨询集团有限公司;山东大学岩土与结构工程研究中心;
【分类号】：U231.3;U455.4
本文编号：2424878
[Abstract]:In view of the possible safety problems in the cross passage of the underground tunnel in the extremely shallow water-rich sand layer, the method of laboratory experiment, theoretical analysis and numerical simulation is adopted to carry out the grouting reinforcement test and the optimization of the excavation method for the tunnel. This paper presents a set of grouting reinforcement technology and excavation method suitable for cross passage of shallow water rich sand layer. It is considered that grouting reinforcement can effectively improve the physical and mechanical parameters of sand layer and the mechanical properties of soil. The later the supporting time, the bigger the surrounding rock deformation. Pre-reinforcement can effectively improve the physical and mechanical parameters of the surrounding rock, reduce the surrounding rock deformation, and improve the stress-strain relationship. The characteristics of settlement, stress and plastic zone distribution of arch after excavation by step method and CRD method are compared and analyzed. The feasibility of this process is verified by comparison of field excavation monitoring quantity control and numerical analysis. This study can provide some reference and guidance for similar projects.
【作者单位】： 中铁工程设计咨询集团有限公司;山东大学岩土与结构工程研究中心;
【分类号】：U231.3;U455.4
【相似文献】
相关期刊论文 前7条
1 袁辉;袖阀管注浆加固深层土技术[J];市政技术;2005年06期
2 周满兴;;浅谈岩溶注浆的施工工艺[J];上海铁道科技;2011年04期
3 徐京海;;淤泥质黏土地基注浆加固效果的研究[J];铁道建筑技术;2014年06期
4 曹德更;;地铁暗挖车站下穿桥梁基础施工工法探究[J];城市道桥与防洪;2014年05期
5 吴县荣;;沪昆高铁岩溶路基注浆加固和检测技术分析[J];山西建筑;2014年08期
6 刘洋;;运营铁路病害路基的注浆加固[J];四川建筑;2008年03期
7 ;[J];;年期
相关硕士学位论文 前2条
1 李若飞;地基注浆加固法在地铁盾构施工中对减少建筑物沉降的研究[D];内蒙古科技大学;2015年
2 李凌冬;杭长客运专线覆盖型岩溶路基注浆加固效果检测与稳定性分析[D];西南交通大学;2014年
，本文编号：2424878
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2424878.html
