黄土沟谷区高填方路堤沉降规律试验研究

Experimental Study on Settlement Law of High Fill Embankment in Loess Gully Region

摘要: 依托通定高速ZK61 + 880~ZK61 + 960黄土沟谷区高填方段，对修筑在该段的高填方路堤开展现场试验，监测路堤的温湿度与沉降变化情况，并对沉降规律与沉降影响因素进行了分析。监测结果表明：强降雨天气能影响路堤浅层土体含水率而影响沉降；路堤在长期低温状态下浅层土体会出现轻微隆起现象；路堤的沉降主要来源于填筑体的沉降，且沉降量受到地形与填土高度的影响；填土层从下到上单位厚度的沉降量依次增加；填方高度与填筑体沉降速率线性相关。

Abstract: Relying on the high fill section of the ZK61+880~ZK61+960 loess valley area of Tongding Expressway, field tests were carried out on the high fill embankment built in this section to monitor the temperature, humidity and settlement changes of the embankment, and factors to determine the settlement law and settlement effect were analyzed. The monitoring results show that: heavy rainfall weather can affect the water content of the shallow soil of the embankment and affect the settlement; the shallow soil of the embankment will slightly bulge under the long-term low temperature state; the settlement of the embankment mainly comes from the settlement of the filling body, and the settlement amount affected by topography and fill height; the settlement of the fill layer per unit thickness increases sequentially from bottom to top; the fill height is linearly related to the settlement rate of the fill.