最近我們了解了蘭州市郊的永进渠、西坪渠、登丰渠等渠道工程,找到了黃土渠道塌陷的一般規律,茲將其塌陷的原因及防止的方法介紹如下: 挖方工程有五种塌陷現象: 1.外側滑坡:渠綫太靠外,形成半填半挖,渠水超过了挖方断面。 2.內側滑塌:渠道轉弯太急,独山咀处的边坡小于1:1,黄土孔隙率大于50％,坡脚滲入了較多的水份,都会造成滑坡。 Recently, we have learned about the channel works of Yongjin Canal, Xiping Channel and Dengfeng Drainage in the outskirts of Lanzhou. We have found the general rules for the collapse of loess channels. The reasons for their collapse and the prevention methods are as follows: There are five collapse phenomena : 1. Lateral landslides: Drainage lines are too close to the outside to form a semi-cut and semi-dredged canal where the water exceeds the excavation section. 2. Slipping inside: the channel turns too fast, Dushan Tsui slope is less than 1: 1, loess porosity greater than 50%, slope foot infiltration of more water, will cause landslides.