CAJ | 학술논문

为充分认识大型土工织物充泥管袋受力和变形的时变特性,并为管袋设计提供计算依据,采用无量纲化的方法,推求土工织物管袋在充泥过程中,从管袋顶部压力为零(即自由充填)到大于零(即通过泵压充填阶段)的拉力、变形形状以及充填高度随时间变化过程的解答。结果表明：当采用密度为ρ的泥浆充填横截面周长为L的管袋时,从自由充填到泵压充填的临界充填高度为0.1L,单位长度充填体积为0.04L2,对应的管袋拉力为0.0025ρgL2；管袋在达到临界充填高度后,需要持续增加泵压才能使其继续充填,所需泵压与管袋拉力均随充填高度呈非线性快速增长。
위충분인식대형토공직물충니관대수력화변형적시변특성,병위관대설계제공계산의거,채용무량강화적방법,추구토공직물관대재충니과정중,종관대정부압력위령(즉자유충전)도대우령(즉통과빙압충전계단)적랍력、변형형상이급충전고도수시간변화과정적해답。결과표명：당채용밀도위ρ적니장충전횡절면주장위L적관대시,종자유충전도빙압충전적림계충전고도위0.1L,단위장도충전체적위0.04L2,대응적관대랍력위0.0025ρgL2；관대재체도림계충전고도후,수요지속증가빙압재능사기계속충전,소수빙압여관대랍력균수충전고도정비선성쾌속증장。
To understand the time-variant characteristics of force and deformation of large-size geosynthetic tubes filled with slurry and to provide a calculation basis for tube design, the tension, shape, and height of a geosynthetic tube during the filling process were calculated using the dimensionless method. Two working conditions during the filling process were considered: one was the free filling condition, under which the pressure at the top of the geosynthetic tube was zero, and the other was the pump filling condition, under which the pressure at the top of the geosynthetic tube was greater than zero. It was found that, when a geosynthetic tube with a perimeter of L was filled with slurry with a density ofρ, the critical filling height from the free filling condition to the pump filling condition is 0. 1L, the filling volume per unit length of the geosynthetic tube is 0. 04L2 , and the corresponding tension of the geosynthetic tube is 0. 002 5ρgL2 . After the critical filling height was reached, a continuous increase in the pump pressure was needed to maintain the filling process. Both the required pump pressure and the tension of the geosynthetic tube increase nonlinearly and rapidly with the filling height.