| 软土路基后期沉降推算方法及误差分析 |
| |
| 引用本文： | 周全能.软土路基后期沉降推算方法及误差分析[J].岩土力学,2007,28(3):512-516. |
| |
| 作者姓名： | 周全能 |
| |
| 作者单位： | 铁道第四勘察设计院工程承包公司,武汉,460063 |
| |
| 摘 要： | 以某高速公路软基处理断面实测沉降资料为基础，分别对应用较为广泛的7种后期沉降推算方法的精度及误差进行了比较分析。针对每一种推算方法，研究了计算时间起点和时间跨度对推算精度的影响，并探讨了各种方法的优缺点及适用性。研究表明，常用的双曲线法和指数曲线法的推算精度与推算的时间起点关系较大，建议以恒载期3～5个月后为时间起点，取较长时间的沉降资料进行推算，可有效提高推算精度；三点法、沉降速率法和新野法的推算精度较高，且与计算时间起点和时间跨度的关系不大，但都需要对原始观测数据进行特殊处理，计算较为复杂；Asaoka法的推算结果与实测值最为接近，其缺点在于无法对停止加载后某阶段的沉降进行推求。
|
| 关 键 词： | 软土路基 后期沉降 推算方法 误差 |
| 文章编号： | 1000-7598-（2007）03-0512-05 |
| 收稿时间： | 2006-03-16 |
| 修稿时间： | 2006-03-16 |
On prediction method and accuracy of post-construction settlement for soft soil embankment in highway |
| |
| ZHOU Quan-neng.On prediction method and accuracy of post-construction settlement for soft soil embankment in highway[J].Rock and Soil Mechanics,2007,28(3):512-516. |
| |
| Authors: | ZHOU Quan-neng |
| |
| Institution: | The Fourth Survey and Design Institute of China Railway, Wuhan 430074, China |
| |
| Abstract: | Seven methods of calculating the post-construction settlement for soft soil embankment are introduced; and the prediction accuracy of each method is analyzed based on actual measuring settlements. For each prediction method, the influences of calculation starting time and time span on the accuracy are studied; and each method’s advantages and applicability are analyzed. The research results show that hyperbola method and exponent curve method’s predicting errors are larger, after three months’ permanent load as the time starting point is proposed; a longer period of settlement data prediction can effectively improve predicting accuracy. Three-point method’s, settlement rate method’s and Hushino method’s predicting precisions are higher, and the calculation starting point and time span do not have much relation, but require special treatment to the original observation data , the calculation is more complex. The predicting results of Asaoka method is closest to truth value; its shortcoming is unable to predict the settlement which after a certain stage of stop load-on. |
| |
| Keywords: | soft ground post-construction settlement prediction method calculation error |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
