抗震预应力锚索性能研究及应用
发布时间：2018-10-26 20:09
【摘要】：预应力锚索是一种主要承受拉力的构件，通过钻孔将锚固段固定于深部稳定的岩土体中，，并通过张拉锚索产生预应力，从而达到使被锚固体更加稳定和限制其变形的目的。由于预应力锚索具有主动加固、结构轻巧、加固效率高等特点，在边坡、深基坑等工程中得到了广泛应用。目前，静荷载作用下预应力锚索的性能研究较多，但是地震作用下预应力锚索抗震性能的研究还处于起步阶段。论文研究了预应力锚索在地震作用下的破坏模式，开展了抗震锚索的性能试验研究，并进行了现场试验与工程应用。论文主要工作如下： 首先分析了锚索施工、时间和岩体变形三个因素对预应力锚索锚固性能的影响。根据汶川地震后边坡的破坏特征详细的研究了预应力锚索在地震作用下的响应机制和破坏模式，并针对预应力锚索的破坏特征进行了原因分析。在此研究的基础上提出了一种适用于高烈度震区的抗震锚索。 其次，对提出的抗震锚索进行了实验研究，通过抗震锚索性能试验得出锚索的屈服荷载，并分析了压力分散型抗震锚索是否能利用其独特的抗震屈服大位移的特点来解决锚索各受力筋受力不均匀的问题。同时通过现场锚索的张拉实验来验证在既有施工条件和地质条件下抗震锚索是否能够承受设计荷载，并验证了锚索的张拉工艺是否可以优化。 最后，根据抗震锚索在毕威高速公路上某处高边坡的应用，依托实际工程案例中抗震锚索的施工情况和锚索预应力监测数据的综合分析，研究了抗震锚索在工程实例中的锚固性能，确定了抗震锚索在工程的各种参数，为抗震锚索的设计和施工提出了有效的建议和改进。
[Abstract]:Prestressed Anchorage cable is a kind of member which mainly bears tensile force. The anchoring section is fixed in the deep stable rock and soil by drilling hole, and the prestress is produced by tension anchor cable, so as to make the Anchorage body more stable and limit its deformation. Prestressed anchor cables are widely used in slope, deep foundation pit and other projects because of their advantages of active reinforcement, light structure and high reinforcement efficiency. At present, there are many researches on the behavior of prestressed anchor cable under static load, but the seismic behavior of prestressed anchor cable under earthquake is still in its infancy. In this paper, the failure mode of prestressed anchor cable under earthquake is studied, the performance test of anti-seismic anchor cable is carried out, and the field test and engineering application are carried out. The main work of this paper is as follows: firstly, the influences of cable construction, time and rock deformation on the anchoring performance of prestressed anchor cables are analyzed. According to the failure characteristics of slope after Wenchuan earthquake, the response mechanism and failure mode of prestressed anchor cable under earthquake are studied in detail, and the causes of failure characteristics of prestressed anchor cable are analyzed. On the basis of this research, a kind of seismic anchoring cable suitable for high intensity seismic area is proposed. Secondly, the experimental study of the proposed anti-seismic anchor cable is carried out, and the yield load of the anchor cable is obtained through the performance test of the anti-seismic anchor cable. This paper also analyzes whether the pressure-dispersive Anchorage cable can take advantage of its unique characteristics of seismic yield and large displacement to solve the problem that the stress of the cable is not uniform. At the same time, through the field cable tension experiment to verify whether the anti-seismic anchor cable can withstand the design load under the existing construction conditions and geological conditions, and to verify whether the tension process of the anchor cable can be optimized. Finally, according to the application of seismic Anchorage cable in a high slope of Biwei Expressway, the construction situation of anti-seismic anchor cable and the monitoring data of pre-stress of Anchorage cable in actual engineering cases are analyzed synthetically. The anchoring performance of seismic anchoring cables in engineering cases is studied, and various parameters of seismic anchoring cables in engineering are determined. Effective suggestions and improvements for the design and construction of seismic anchoring cables are put forward.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.1
本文编号：2296820
[Abstract]:Prestressed Anchorage cable is a kind of member which mainly bears tensile force. The anchoring section is fixed in the deep stable rock and soil by drilling hole, and the prestress is produced by tension anchor cable, so as to make the Anchorage body more stable and limit its deformation. Prestressed anchor cables are widely used in slope, deep foundation pit and other projects because of their advantages of active reinforcement, light structure and high reinforcement efficiency. At present, there are many researches on the behavior of prestressed anchor cable under static load, but the seismic behavior of prestressed anchor cable under earthquake is still in its infancy. In this paper, the failure mode of prestressed anchor cable under earthquake is studied, the performance test of anti-seismic anchor cable is carried out, and the field test and engineering application are carried out. The main work of this paper is as follows: firstly, the influences of cable construction, time and rock deformation on the anchoring performance of prestressed anchor cables are analyzed. According to the failure characteristics of slope after Wenchuan earthquake, the response mechanism and failure mode of prestressed anchor cable under earthquake are studied in detail, and the causes of failure characteristics of prestressed anchor cable are analyzed. On the basis of this research, a kind of seismic anchoring cable suitable for high intensity seismic area is proposed. Secondly, the experimental study of the proposed anti-seismic anchor cable is carried out, and the yield load of the anchor cable is obtained through the performance test of the anti-seismic anchor cable. This paper also analyzes whether the pressure-dispersive Anchorage cable can take advantage of its unique characteristics of seismic yield and large displacement to solve the problem that the stress of the cable is not uniform. At the same time, through the field cable tension experiment to verify whether the anti-seismic anchor cable can withstand the design load under the existing construction conditions and geological conditions, and to verify whether the tension process of the anchor cable can be optimized. Finally, according to the application of seismic Anchorage cable in a high slope of Biwei Expressway, the construction situation of anti-seismic anchor cable and the monitoring data of pre-stress of Anchorage cable in actual engineering cases are analyzed synthetically. The anchoring performance of seismic anchoring cables in engineering cases is studied, and various parameters of seismic anchoring cables in engineering are determined. Effective suggestions and improvements for the design and construction of seismic anchoring cables are put forward.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.1
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