| 考虑挡墙位移效应的被动侧土压力计算方法 |
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| 引用本文： | 宋飞,张建民.考虑挡墙位移效应的被动侧土压力计算方法[J].岩土力学,2011,32(1):151-157. |
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| 作者姓名： | 宋飞 张建民 |
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| 作者单位： | 1. 长安大学 公路学院，西安 710064；2. 清华大学 水沙科学与水利水电工程国家重点实验室，北京 100084 |
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| 基金项目： | 陕西省自然科学基金青年项目（No. 2010JQ7002）；中国博士后科学基金资助项目（No. 20100471591）。 |
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| 摘 要： | 挡土结构上土压力的计算是土力学和岩土工程领域的基本研究课题之一。实际工程中的土压力通常是介于主动土压力和被动土压力之间的某一值，墙后填土由于碾压具有较高的密实度。经典的朗肯和库仑土压力理论只能计算极限状态下的土压力，没有考虑挡墙的位移以及剪切过程中密砂的强度从峰值强度降低到残余强度这一强度变化特性对于土压力的影响。给出了考虑挡墙位移效应的被动侧土压力计算方法，该方法能够同时考虑剪切过程中密砂的强度从峰值强度降低为残余强度这一强度变化特性对被动土压力的影响。通过土压力模型试验结果对计算方法进行了初步验证，计算结果和试验结果吻合较好，表明了该方法的有效性。
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| 关 键 词： | 土压力 挡墙位移 被动侧 密砂 强度 |
| 收稿时间： | 2009-07-24 |
Computational method of earth pressure at passive side considering wall displacement effect |
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| SONG Fei,ZHANG Jian-min.Computational method of earth pressure at passive side considering wall displacement effect[J].Rock and Soil Mechanics,2011,32(1):151-157. |
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| Authors: | SONG Fei ZHANG Jian-min |
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| Institution: | 1. School of Highway, Chang’an University, Xi’an 710064, China; 2. State Key Laboratory of Hydrosciences and Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | Computation of earth pressure acting on retaining structures constitutes an important research subject in the field of geotechnical engineering. In many engineering practices, the retaining wall displacement causing the backfill yield sufficiently cannot take place so that the earth pressure may fall anywhere between active and passive earth pressures. Besides, due to compaction, the backfill is always dense and its shear resistance will decrease from peak resistance to residual state during shear. However, classic Rankine and Coulomb earth pressure theories can only evaluate the earth pressure at the active and passive state. And they cannot consider the effect of reduction of post-peak shear soil resistance on earth pressure. The development of earth pressure at the passive side with wall displacement is studied. On the basis a new methodology is developed to evaluate earth pressures at the passive side under any boundary strain constraint for a rigid retaining structure with translational movement. It can take into account the effect of wall displacement and the strength characteristic of dense sand on earth pressure. The agreement of calculated results with the experimental ones confirms the correctness of the proposed method. |
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| Keywords: | earth pressure wall displacement passive side dense sand strength |
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