分层填筑模拟的层数对300m级高土石坝沉降量的影响

以某300m级的土石坝为例,在不同填筑层数下计算竣工期坝体沉降,研究填筑层数对300m级土石坝沉降量的影响。结果表明,当模拟填筑层数达到10层左右时,沉降量分布规律无明显变化,最大沉降量随着填筑层数的增加依然有减小的趋势;当模拟填筑层数达到25~30层以后,最大沉降量随填筑层数的变化才趋于稳定。对于300m级的土石坝,建议模拟填筑层数达到25~30层。

Influence of Simulated Fill Layer Number on Settlement of 300 m High Embankment Dams

This paper takes a 300m high embankment dam as an example to analyze the influence of simulated layer number on the settlement of 300m high embankment dams by simulating the dam stress and deformation during construction.The results illustrate that when simulated layer number exceed 10,the settlements distribution has no obvious change with the increasing in the simulated layer number,but the largest settlement still decreases gradually with the increasing placement layer number in it.When filled layer number reaches 25 to 30,the largest settlement changes little.Consequently,it is suggested that the simulated layer number for 300m high embankment dams should be 25 to 30.