土工织物充灌袋简易设计计算方法研究

Curving fitting method for design of geomembrane tubes

土工织物充灌袋广泛应用于围堤结构、挡水结构以及橡胶坝中。其理论分析方法国内外许多学者进行了较深入的研究,但研究成果多为解析解,在工程设计应用中具有一定的局限性。为了提出一种能够方便设计使用的简易而准确的设计计算方法,建立了能够根据泵送压力计算充灌袋拉力、截面形状的解析方程。为了能够方便研究不同泵送压力与充灌袋周长、充灌袋拉力以及截面尺寸之间的关系,对泵送压力、充灌袋拉力、充灌袋高度和宽度进行无量纲化处理。根据提出的解析方程编制计算程序,计算标准化泵送压力与标准化高度、标准化截面面积以及标准化拉力之间的关系曲线。采用Chapman-Richard成长曲线模型对标准化的曲线进行拟合,进而提出土工织物充灌袋简易的设计计算方法。通过与其他计算方法和模型试验结果对比,验证了该方法的正确性。因此该方法可以用于土工织物充灌袋的工程设计。

Geomembrane tubes have been widely used to construct dikes, rubber dams and flood control structures. The analytical methods for the design of geomembrane tubes have been well developed. However, these methods cannot be used directly but have to operate using computer program. For the convenience of research and design, a curve fitting method is proposed to simplify the design process for the geomembrane tubes. The pumping pressure, tensile force and geometric parameters are dimensionless. Based on the computer program, the relation curves among the pumping pressure, tensile force and geometric parameters of geomembrane tubes are established. A set of simplified dimensionless design equations are then derived using the Chapman-Richard model. The validities of these curve fitting equations are verified using the results by others and large scale laboratory model tests. The proposed curve fitting equations can be used for the preliminary design of the geomembrane tube.