| 山区挡土墙土压力的现场试验研究 |
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| 引用本文： | 肖衡林,余天庆.山区挡土墙土压力的现场试验研究[J].岩土力学,2009,30(12):3771-3775. |
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| 作者姓名： | 肖衡林 余天庆 |
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| 作者单位： | 1.中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，武汉 430071；2.湖北工业大学 土木工程与建筑学院，武汉 430068 |
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| 基金项目： | 湖北省交通厅科技项目资助 |
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| 摘 要： | 结合某山区高速公路多个挡土墙墙背水平土压力的监测数据，对挡土墙墙背的水平土压力时空分布规律进行了详细地研究。研究结果表明：施工期间，不同深度的土压力随着上部填土高度增加而增长的速度不同，愈是接近墙顶，其增加越快；施工期间实测水平土压力介于静止土压力和被动土压力之间，在墙身的3/4以下与静止土压力接近，在墙身的1/2以上与垂直土压力接近。刚施工完的挡土墙土压力为非线性分布，近似成双直线，实际土压力合力介于静止土压合力和垂直土压合力之间，更接近静止土压合力，其大小约为库伦主动土压力的2.5倍，为库伦被动土压力的0.3倍。土压力合力作用点在0.38倍墙高处。土压力随着时间而变化，在测量期间土压力变化规律为先减少后增加，总的趋势是不断增加，且随时间的变化量较大。
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| 关 键 词： | 山区 挡土墙 土压力 分布规律 试验研究 |
| 收稿时间： | 2009-05-27 |
Field experiment on earth pressure behind retaining wall in mountainous area |
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| XIAO Heng-lin,YU Tian-qing.Field experiment on earth pressure behind retaining wall in mountainous area[J].Rock and Soil Mechanics,2009,30(12):3771-3775. |
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| Authors: | XIAO Heng-lin YU Tian-qing |
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| Institution: | 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. School of Civil Engineering and Architecture, Hubei University of Technology, Wuhan 430068, China |
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| Abstract: | s: Based on the monitoring data of earth pressure of several retaining walls in mountainous area, the distributing rules of earth pressure of retaining wall were studied in detail. The tests results show that: ①The increase speed of earth pressure in different depth was different. ②The value of earth pressure is intervenient between the still earth pressure and vertical earth pressure. It is closer to the still earth pressure below the depth of three-quarter retaining wall, and is closer to the vertical earth pressure above the depth of one-half retaining wall. ③The earth pressure behind retaining wall is nonlinearly following the depth of retaining wall. The curves can be considered as double line. The resultant earth pressure is about 2.5 times of resultant Coulomb active earth pressure and 0.3 times of resultant Coulomb passive earth pressure. The height of action point of resultant earth pressure is 0.38 times of the retaining wall. The earth pressure changes with time, and its rule is: the earth pressure increases first, and then decreases with time; furthermore, the change range is rather large. |
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| Keywords: | mountainous area retaining wall earth pressure distributing rules field experiment |
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