| 厚冲击覆盖层岩溶区桥梁钻孔灌注桩优化设计 |
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| 引用本文： | 李之达,李耘宇,胡晓敏,易辉.厚冲击覆盖层岩溶区桥梁钻孔灌注桩优化设计[J].湘潭大学自然科学学报,2005,27(1):116-120,124. |
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| 作者姓名： | 李之达 李耘宇 胡晓敏 易辉 |
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| 作者单位： | 1. 华中科技大学力学系,武汉,430074;武汉理工大学交通学院,武汉,430063
2. 武汉理工大学交通学院,武汉,430063 |
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| 基金项目： | 湖北省交通科技项目 (0 2 -3 9-1) |
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| 摘 要： | 结合静载试验,对厚冲积覆盖层岩溶地区钻孔灌注桩持力层顶板厚度和嵌岩深度开展研究,对其进行优化.首先,利用相关地质资料,对上部土层侧阻、嵌岩侧阻和桩端阻力的分布和发挥程度进一步分析,估计土体中桩身极限摩擦阻力和桩端极限承载力;其次,利用静载试验所获得的桩身侧阻、嵌岩侧阻和桩端阻力的分布和发挥程度,估计作用在嵌岩段侧阻力,对嵌岩深度进行计算,力图使桩身摩擦阻力、嵌岩段侧阻力和桩端阻力都得到有效地利用
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| 关 键 词： | 顶板厚度 嵌岩深度 优化 |
| 文章编号： | 1000-5900(2005)01-0116-05 |
Optimized Design of the Bored Filling Pile of Bridges in Alluvial Covering Deposit in Karst Zone |
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| LI Zhi-da,LI Yun-yu,HU Xizo-min,YI Hui.Optimized Design of the Bored Filling Pile of Bridges in Alluvial Covering Deposit in Karst Zone[J].Natural Science Journal of Xiangtan University,2005,27(1):116-120,124. |
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| Authors: | LI Zhi-da LI Yun-yu HU Xizo-min YI Hui |
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| Abstract: | In this paper, the thickness of the supporting plate and the depth of wedging in rock of the bored filling pile of bridges in deep alluvial covering deposit in karst zone are researched. And the result has been optimized. First, distributing and exerting degree of side resistance of the top soil and wedging in rock, resistance of pile end are analyzed; and the limit friction and limit bear of the weight of pile end in soil are estimated. Secondly,the result of distributing and exerting degree of the side resistance of the pile body and wedging in rock, resistance of pile end from loading test are used to estimate the side resistance of wedging; the depth of wedging is calculated so as to make good use of the three resistances. |
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| Keywords: | thickness of the top plate depth of wedging in rock optimize |
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