| 预应力锚杆柔性支护喷射混凝土面层上的土压力 |
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| 引用本文： | 涂兵雄,贾金青,王海涛,蔡燕燕,俞 缙.预应力锚杆柔性支护喷射混凝土面层上的土压力[J].岩土力学,2013,34(12):3567-3572. |
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| 作者姓名： | 涂兵雄 贾金青 王海涛 蔡燕燕 俞 缙 |
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| 作者单位： | 1.华侨大学 岩土工程研究所，福建 厦门 361021；2. 大连理工大学 土木工程学院，辽宁 大连 116024； 3.大连交通大学 土木与安全工程学院，辽宁 大连 116023 |
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| 基金项目： | 国家自然科学基金项目（No. 51308234）；福建省自然科学基金项目（No. 2013J05079）；厦门市科技计划项目（No. 3502Z20133021）；泉州市科技计划项目（No. 2012Z92）。 |
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| 摘 要： | 针对锚喷支护设计中面层土压力计算模式存在的问题，以预应力锚杆柔性支护技术为研究对象，假定锚杆间的土拱为二维平面拱，推导出了一种作用在喷射混凝土面层上的土压力计算方法，得到了面层土压力的分布曲线。分析土体黏聚力 、内摩擦角 、外摩擦角 和锚杆水平间距 对面层土压力的影响，并与简仓法计算结果进行了对比。结果表明， 越小，面层土压力越大，且简仓法计算值明显小于文中计算值； 对面层土压力最大值无影响；面层土压力最大值与 成正比； 对面层土压力也有明显影响，在实际工程设计中，不应忽略 对减小面层土压力的贡献。最后给出了计算面层上的土压力简化公式。
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| 关 键 词： | 土拱效应 喷射混凝土 土压力 锚杆 |
| 收稿时间： | 2012-03-07 |
Earth pressure on shotcrete of flexible retaining method with prestressed anchor |
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| TU Bing-xiong,JIA Jin-qing,WANG Hai-tao,CAI Yan-yan,YU Jin.Earth pressure on shotcrete of flexible retaining method with prestressed anchor[J].Rock and Soil Mechanics,2013,34(12):3567-3572. |
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| Authors: | TU Bing-xiong JIA Jin-qing WANG Hai-tao CAI Yan-yan YU Jin |
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| Institution: | 1. Geotechnical Engineering Institute, Huaqiao University, Xiamen, Fujian 361021, China; 2. School of Civil Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China; 3. School of Civil and Safety Engineering, Dalian Jiaotong University, Dalian, Liaoning 116023, China |
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| Abstract: | A new earth pressure expression is derived to calculate the earth pressure on the shotcrete of flexible retaining method with prestressed anchor in order to solve the computation model of earth pressure on the shotcrete in the anchor shotcrete support design on the base of two-dimensional soil arch. And the distribution of earth pressure on the shotcrete along the depth is established. The values of earth pressure from this paper are compared with those calculated by silo method from the Specifications of design for geological hazard stabilization for different soil parameters, such as soil cohesion , soil internal friction angle , soil-shotcrete friction angle and horizontal distance between the adjacent anchors. The results show that the earth pressure on the shotcrete increases with decreasing ; and values are greater than those calculated by silo method for a small . The maximum earth pressure is proportional to while has no effect on the maximum earth pressure. Variation in parameter has a significant effect on the earth pressure and should not be neglected for engineering design because of the contribution for decreasing the earth pressure on the shotcrete. Finally, a simplified expression for calculating earth pressure on shotcrete is provided. |
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| Keywords: | soil arching effects shotcrete earth pressure anchor |
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