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针对灾害边(滑)坡的应急加固处置,提出了“动态勘察”的概念。基于“动态勘察”的目标,选择U型钢板桩作为灾害边(滑)坡的应急加固支挡结构。结合U型钢板桩的三种压入工法,分别采集了其压桩曲线图谱,对其进行了量化分析,定义了一系列的量化参数,分析了压桩曲线图谱与地层强度间的内在联系,分别拟合3种压入工法的压桩数据与地层强度特征值之间的经验关系式,并进行了工程实例的验证。试验结果表明,压桩曲线在地层分界面处会发生变化,可用于判断分界面位置;压桩曲线在不同地层会呈现不同特征,可利用经验公式近似预测地层强度。因此,利用压桩曲线特征与地层强度间的对应关系来进行“动态勘察”是可行的。
Aiming at the emergency reinforcement of edge (slippery) slopes, the concept of “dynamic survey” was put forward. Based on the objective of “Dynamic Surveying”, U-shaped steel sheet piles are selected as the emergency reinforcing retaining structures for the edge (slip) slope. Combined with the three types of U-shaped steel sheet pile into the three methods, respectively, the piling curve was collected, quantified and analyzed, a series of quantitative parameters were defined, the intrinsic relationship between pile curve and stratum strength was analyzed, The empirical relationship between the pile pressing data and the stratum strength characteristic values of the three kinds of embedding methods is respectively fitted, and the engineering example is verified. The test results show that the curve of piles changes at the interface of strata and can be used to judge the location of interface. The curve of piles has different characteristics in different strata, and the empirical formula can be used to approximate the strength of strata. Therefore, it is feasible to use the correspondence between the curve characteristics of piling pile and the strength of strata to conduct “dynamic survey”.