曲线顶管管幕管间相互影响研究
发布时间：2018-12-13 09:19
【摘要】：曲线顶管管幕施工较直线顶管管幕精度控制难度大、管间相互影响显著、管幕形成更难。文章以港珠澳大桥拱北隧道曲线顶管管幕施工为依托,通过模型试验、数值模拟、现场试验等手段对曲线顶管管幕管间相互影响进行了研究,分析了顶管对土体的累积扰动、土体应变以及管土接触压力、轨迹影响等规律特征。结果表明:顶管顶进过程中,顶管机头前方的地表发生隆起,机头前方土体横、纵向应变增大;模型试验所得土体的位移及应变变化规律与数值模拟结果较为一致;在顶进参数有效控制、施工措施得当的条件下,通过及时测量纠偏,曲线管幕顶管间的相互影响可得到有效降低和控制,可确保顶管形成管幕。
[Abstract]:The precision control of curved pipe curtain is more difficult than that of straight line pipe curtain construction, and the interaction between pipes is obvious, and the formation of pipe curtain is more difficult. Based on the construction of curved top pipe curtain of Gongbei Tunnel of Hongkong-Zhuhai-Macao Bridge, this paper studies the interaction between curve-top pipe curtain and pipe through model test, numerical simulation and field test, and analyzes the cumulative disturbance caused by pipe jacking to soil. The characteristics of soil strain, the contact pressure of pipe and soil, the influence of trajectory, etc. The results show that the earth surface in front of the pipe-jacking die bulges, the transverse and longitudinal strain of soil increases in front of the pipe-jacking head, and the displacement and strain variation of the soil obtained from the model test are consistent with the numerical simulation results. Under the condition of effective control of jacking parameters and proper construction measures, through timely measurement and correction, the interaction between pipe jacking with curved curtain can be effectively reduced and controlled, and the pipe jacking can be ensured to form pipe curtain.
【作者单位】： 广东省南粤交通投资建设有限公司;港珠澳大桥珠海连接线管理中心;
【基金】：交通运输部建设科技项目(2013318J11300) 广东省交通运输厅重大工程科技项目(2010-01-002)
【分类号】：U455.4
[Abstract]:The precision control of curved pipe curtain is more difficult than that of straight line pipe curtain construction, and the interaction between pipes is obvious, and the formation of pipe curtain is more difficult. Based on the construction of curved top pipe curtain of Gongbei Tunnel of Hongkong-Zhuhai-Macao Bridge, this paper studies the interaction between curve-top pipe curtain and pipe through model test, numerical simulation and field test, and analyzes the cumulative disturbance caused by pipe jacking to soil. The characteristics of soil strain, the contact pressure of pipe and soil, the influence of trajectory, etc. The results show that the earth surface in front of the pipe-jacking die bulges, the transverse and longitudinal strain of soil increases in front of the pipe-jacking head, and the displacement and strain variation of the soil obtained from the model test are consistent with the numerical simulation results. Under the condition of effective control of jacking parameters and proper construction measures, through timely measurement and correction, the interaction between pipe jacking with curved curtain can be effectively reduced and controlled, and the pipe jacking can be ensured to form pipe curtain.
【作者单位】： 广东省南粤交通投资建设有限公司;港珠澳大桥珠海连接线管理中心;
【基金】：交通运输部建设科技项目(2013318J11300) 广东省交通运输厅重大工程科技项目(2010-01-002)
【分类号】：U455.4
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