两种新型抛石护岸工艺在深水区应用效果对比

Application effects comparison of two new riprap revetment technologies in deep water area

长江下游深水区由于水深流急,传统抛石护脚的施工难度极大。近年来,网兜散抛石和沉箱式抛石这两种新型抛石施工工艺发展迅速。以长江老海坝抛石护岸工程为例,对比了两种工艺的抛石效果与成本,抛石效果主要采用抛石增厚和抛石均匀度两个评价指标进行定量分析。结果表明:沉箱式抛石工艺虽然工程直接费用较高,但抛石增厚效果、抛石均匀度及施工工效均优于网兜散抛石。通过不同研究区的抛石效果对比可知,在深水区抛石效果稳定性控制方面,沉箱式抛石工艺优于网兜散抛石工艺。

The construction of traditional riprap revetment is very difficult in the deep water area of the lower reaches of the Yangtze River because of the deep water and rapid flow.In recent years,net pocket riprap and caisson riprap construction technology have developed rapidly.Taking the riprap revetment project of Laohaiba dam of the Yangtze River as an example,the riprap construction qualities and costs of the two technologies are compared,and the construction qualities are analyzed from two aspects of thickening value and uniformity.The results show that the direct costs of caisson riprap are high,but the thickening effect,construction uniformity and efficiency of caisson riprap are better than net pocket riprap.Through the comparison of riprap effect in different study areas,it can be seen that in terms of effect stability control,caisson riprap technology is better than net pocket riprap.