施工技术 2013年10月上 122 CONSTRUCTION TECHNOLOGY 第42卷第19期 D0I:10.7672/sgjs2013190122 浅覆土大直径顶管顶进过程对周围土体影响研究 孙鹤明，靳志强 (中交一公局第三工程有限公司，北京101102) [摘要]结合实际工程，对顶管顶进过程中的地表沉降、深层位移进行了现场监测，并结合理论计算结果进行了分 析对比.介绍了地表沉降变形的原理以及地表沉降的监测方案.从据进机正面顶推力、侧面摩阻力、开挖时土体 损失儿个方面分别对土体深层水平位移进行了计算分析.结果表明，计算结果和实测数据较为接近，文中列出的 公式可以很好地预测土体深层水平位移. [关键词]地下工程；顶管；浅覆土；沉降；位移；监测 [中图分类号]TU992 [文献标识码]A [文章编号]1002-8498(2013)19-0122-04 Research on the Influence of Large-diameter Pipe Jacking Construction on Surrounding Soil Sun Heming Jin Zhiqiang The Third Engineering Co.Lad.of the First Highway Engineering Bureau of CCCC Beijing 101102 China) Abstract:Based on engineering practice the ground settlement and displacement in deep soil in pipe jacking construction were monitored and its calculation result was analyzed.The principle of ground settlement and its monitoring plan were introduced.The displacement in deep soil was analyzed and calculated from jacking force side friction and ground loss.The result shows that the calculated and monitoring data are close the formula in this paper can forecast the displacement in deep soil well. Key words:underground;pipe jacking;shallow covering;settlement;displacement;monitoring 1工程概况 表1土层物理力学参数 太原市汾东商务区人民路雨水管道采用顶管 Table 1 Physical and mechanical parameters of soils 施工工艺，管道直径3m 壁厚30cm 管道为双孔平 土层名称 黏聚力/内摩擦角/渗透系数/ 承藏力/ kPa 行顶管，顶进过程中先施工一条管道，顶进完毕后 () (m*d-) kPa 再施工另一条管道，管顶覆土只有3~5m 地质情况 粉土 15 18 0.35 120 粉质黏土 17 15 0.10 100 主要为粉土、粉质黏土、粉砂，地质条件复杂多变， 粉砂 0 28 15.00 160 如表1所示.施工中通过实际监测先顶进管道顶进 过程中对土体的影...
浅覆土大直径顶管顶进过程对周围土体影响研究.pdf
