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| 单锚类土质边坡锚固预应力传递规律的研究 | |
| 引用本文： | 赵晓彦,蒋楚生,熊自英.单锚类土质边坡锚固预应力传递规律的研究[J].岩土力学,2010,31(2):559-564. |
| 作者姓名： | 赵晓彦 蒋楚生 熊自英 |
| 作者单位： | 1. 西南交通大学,土木工程学院,成都,610031;中国中铁二院集团有限责任公司,成都,610031 2. 中国中铁二院集团有限责任公司,成都,610031 3. 西南交通大学,土木工程学院,成都,610031 |
| 基金项目： | 成都理工大学地质灾害防治与地质环境保护实验室开放基金项目，国家自然科学基金项目 |
| 摘 要： | 在前人理论上推导的基础上，进一步计算了类土质边坡单锚预应力自坡面向坡体内的传递范围，计算了坡体内不同位置处的预应力传递系数，分析得出单锚预应力自坡面向坡体内传递的扩散角为39°左右、合理锚间距为3.2 m左右。以G323改造工程K617段花岗岩风化形成的类土质边坡为原型进行了离心模型试验，在坡体模型内不同位置埋设土压力盒，通过测读土压力盒的读数，得出预应力在坡体内不同位置处引起的土压力变化，间接得出预应力自坡面向坡体内的传递规律。离心模型试验得出的预应力传递规律与理论推导得出规律基本吻合，并得出了预应力传递系数与初始锚固预应力有关的结论，认为这主要是因为边坡岩土体产生塑性形变的结果。理论分析和离心模型试验均得出，锚固措施对近坡面处的浅层土体并无明显的加固作用，锚固边坡也必须进行坡面防护。 |
| 关 键 词： | 单锚类土质边坡 预应力 传递规律 |
| 收稿时间： | 2008-07-10 |
Study of transferring mode of prestressed force in singly anchored soil-like slopes |
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| ZHAO Xiao-yan,JIANG Chu-sheng,XIONG Zi-ying.Study of transferring mode of prestressed force in singly anchored soil-like slopes[J].Rock and Soil Mechanics,2010,31(2):559-564. | |
| Authors: | ZHAO Xiao-yan JIANG Chu-sheng XIONG Zi-ying |
| Institution: | 1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China; 2. China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China |
| Abstract: | The transferring equation of the prestressed force from slope surface into slope body in singly anchored soil-like slope is deduced and discussed on the assumption that the slope body is elastomeric. The transferring coefficients of the prestressed force are put forward according to the transferring formula. The conclusions are drawn that the spreading angle of the prestressed force from slope surface into slope body in singly anchored slope is approximate 39º; and that the optimal space between anchors is about 3.2 m. Some centrifugal model tests are carried out according to a strongly weathered granite slope locating at K617 of G232 road. In the centrifugal model tests, earth pressure cells are set at different points of the slope body to monitor the increased earth pressures caused by the prestressed force. And then the transferring discipline of the prestressed force from slope surface into slope body can be brought out. The results drawn out from centrifugal model tests agree in the main with what from theoretical study. The coefficients of the prestressed force obtained from model tests are related to the amount of the prestressed force, while it is apart from the amount of the prestressed force in the theoretical study. The plastic deformations that occur in the model tests but not be considered in the theoretic study are the main reason. Both the theoretical study and the model tests result in that slope surface protection must be taken into consideration because the effect of the reinforcing is indistinctive in the surface layer of about 2 m. |
| Keywords: | singly anchored soil-like slope prestressed force transferring discipline |
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