摘要
对福州某工程顶管施工期间地表位移、土体位移及孔隙水压力进行了现场监测,并根据实测结果分析研究了顶管施工的土体扰动特性。结果表明,顶管施工引起的地表位移可分为顶管到达前沉降、施工扰动沉降、管土间隙沉降及土体固结沉降四个阶段;土体位移(相对地表)在顶管机头距离监测断面5m范围内达到最大,而孔隙水压力变化比土体位移变化要及时,可通过监测孔隙水压力对施工引起的土层移动作出超前预测。
The site monitoring of surface displacement, soil displacement and pore water pressure in Fuzhou pipe- jacking construction is carried out, and properties of soil disturbance for pipe-jacking construction are studied and analyzed by measured data.The results show that, surface displacement caused by pipe-jacking construction can be divided into four stages, settlement before the arrival of pipe, settlement of pipe jacking construction disturbance, settlement of clearance between pipe and soil and settlement of soil consolidation. Soil displacement （relative to the surface） reached the maximum when the distance between pipe and monitoring cross section is 5m. Pore water pressure changes more timely than soil displacement, which soil displacement can be predicted by monitoring the pore water pressure.
出处
《混凝土与水泥制品》
2016年第6期78-81,共4页
China Concrete and Cement Products
关键词
顶管
现场监测
扰动变形
地表位移
土体位移
孔隙水压力
Pipe jacking
Site monitoring
Soil disturbance
Surface displacement
Soil displacement
Pore water pressure
