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SILT FACTOR FOR SCOUR CALCULATION AROUND BRIDGE FOUNDATION
| 题名： | SILT FACTOR FOR SCOUR CALCULATION AROUND BRIDGE FOUNDATION |
| 正文语种： | 英文 |
| 作者： | R. K. DHIMAN, VSM |
| 作者单位： | Chief Engineer, Border Road Organisation, Project Brahmank |
| 关键词： | strata；variation；bridge；attention；actor；recommend；soil；invest；called；level |
| 摘要： | Foundation of river bridges on alluvial soil is decided based on hydraulic data and subsoil strata. The subsoil strata is represented by a numerical value called silt factor. This factor plays vital role as the foundation level depends upon soil strata underneath, which is examined based on the bore log data. Bridges foundations are very costly due to various reasons depending upon location. There is need to optimize the depth of foundation to a pragmatic level, which can be constructed without undue delay as per construction practices. Any variation in foundation level at later date plays crucial role in the overall cost of the bridges and affect the completion time of the project. It is highlighted that pre construction investigation should be given more attention to avoid any variation in construction programme. Data analyzed based on investigation need to be reviewed in term of construction trend in the area. The importance of silt factor has been discussed in this paper. An accurate estimation of the same helps in completing the foundation in time without time and cost overrun. Border Roads Organisation based on its experience recommend that silt factor upto '8' can be used based on soil strata for calculation of scour depth for bridge foundation in gravely/bouldery beds. |
| 出版年： | 2019 |
| 期刊名称： | Indian Highways |
| 卷： | 47 |
| 期： | 10 |
| 页码： | 18-24 |
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