预应力锚索框架梁在高速公路高陡边坡防护加固工程的应用

本文结合工程实例,在高速公路高陡边坡地质条件及岩体分析的基础上,对高陡边坡防护加固采用的预应力锚索框架梁施工技术方案的设计、验算、施工技术及监测进行了详细阐述和总结。     

预应力锚索框架梁在高速公路高陡边坡防护加固工程的应用

本文结合工程实例,在高速公路高陡边坡地质条件及岩体分析的基础上,对高陡边坡防护加固采用的预应力锚索框架梁施工技术方案的设计、验算、施工技术及监测进行了详细阐述和总结。     

某高陡边坡的加固治理

高陡边坡治理一直是工程建设中的重点与难点,故拟通过某高陡边坡工程为实例,重点介绍高陡边坡的稳定性分析、治理设计、施工工序及施工要点、难点和监测等内容。该边坡已竣工多年,无论暴雨季节还是旱季、少雨季,边坡均未曾发生新的位移变化,说明我们采取的边坡加固治理方案是安全可靠、经济适用、且十分有效的,其加固治理经验对同类工程有很好的参考价值。     

预应力锚杆在高速公路边坡防护加固中的分析应用

本文详细分析介绍了预应力锚杆在高速公路陡边坡防护加固工程中的加固原理及主要复合加固形式，并结合工程实例对其预应力锚杆施工方案及施工工艺与监测进行了详细阐述和总结。     

预应力锚索在高陡边坡加固中的应用

本文详细介绍了大坪山隧道西洞口高陡边坡的加固方法,对预应力锚索加固高陡边坡的施工工艺进行了详尽的阐述,结果可供其他类似工程借鉴参考。     

预应力锚索在高陡边坡加固中的应用

结合工程实例,介绍了预应力锚索在高陡边坡加固工程中的施工方法和注意事项.     

高陡边坡防护加固处理技术与应用

介绍自钻式中空锚杆的受力原理、性能参数、设计要素、施工技术要点和创新亮点,对高陡边坡混凝土施工的垂直运输方案进行分析探讨。通过阳江核电站主厂区西侧边坡防护加固工程实践,阐述边坡防护加固处理措施选择的依据条件,表明白钻式中空锚杆在灾害性地质边坡治理中更具先进性、适用性、经济性。     

高陡边坡防护加固处理技术与应用

介绍自钻式中空锚杆的受力原理、性能参数、设计要素、施工技术要点和创新亮点,对高陡边坡混凝土施工的垂直运输方案进行分析探讨。通过阳江核电站主厂区西侧边坡防护加固处理工程实践,阐述边坡防护加固处理措施选择的依据条件,得出自钻式中空锚杆在灾害性地质边坡治理中更具先进性、适用性、经济性的结论。     

高边坡加固中预应力锚索技术的应用

本文通过介绍预应力锚索应用在加固高边坡施工时的主要施工工艺,证明了预应力锚索技术用于高陡边坡防护是一种有效的加固措施。     

预应力锚索＋框格梁联合支护技术的应用

预应力锚索＋框格梁联合支护施工技术已在高速公路边坡防护工程中得到普遍应用。本文结合工程实例,在边坡地质条件分析的基础上,对高陡边坡防护加固采用的预应力锚索框格梁施工技术方案的设计、验算、施工技术及监测进行了详细阐述和深入探讨,可供同行参考借鉴。     

谈挂网喷锚在高边坡加固中的应用及施工要点

阐述了挂网喷锚的基本原理,结合某公路边坡加固实例,分析了挂网喷锚防护的适用条件及构造要求,并重点归纳了其施工工艺和技术方案,通过有效实施提高了边坡的结构强度,加强了路基边坡的稳定性。     

浅谈蕲州大桥加固处理

通过现场观测,介绍了蕲州大桥存在的锥坡、溜坡及溜坡下陷、肋板裂缝等病害现象,分析了各种病害产生的原因,在此基础上,针对性地提出了各种病害的加固方案,并进行了具体阐述,经实施取得了良好效果,证明了所采用的加固措施合理有效。     

三峡永久船闸高边坡开挖及加固支护设计

永久船闸高边坡是三峡工程的重要建筑物，也是船闸结构的重要组成部分，规模巨大，技术复杂。确定合理的设计原则，选定合适的安全度标准，拟定合理的开挖形态和进行恰当的加固支护，制定合理的开挖与加固施工程序，确保边坡稳定和变形满足结构及运行要求是船闸高边坡设计中研究的主要问题。本结合围绕高边坡设计所进行的大量试验及分析研究成果，系统介绍了船闸高边坡的基本设计思想及开挖与加固支护基本设计方案。     

Optimal design of anchor cables for slope reinforcement based on stress and displacement fields

How to determine reasonable position and length of anchor cable is a frequently encountered but not well addressed problem in slope reinforcement projects. In this paper, the variable-modulus elastoplastic strength reduction method(SRM) is used to obtain the stress field, displacement field, and factor of safety of slope. Slope reinforcement using anchor cables is modeled by surface loading, i.e. different distributions of surface loading represent various reinforcement schemes. Optimal reinforcement scheme of anchor cables can be determined based on slope stress and displacement fields. By comparing the factor of safety and stress field before and after slope reinforcement, it is found that better reinforcement results can be achieved if strong reinforcement is applied upon the regions with high stress and large displacement. This method can well optimize the arrangement of anchor cables. In addition,several cases are employed to verify the proposed method.     

桩锚式边坡联合加固技术稳定性分析

针对传统土质高边坡加固技术的缺点,介绍了桩锚式边坡联合加固技术的特点,通过稳定性分析和工程实践应用,并对其加固效果进行了评价分析,指出该加固技术合理可行,对土质高边坡具有良好的加固效果。     

Pseudo-static/dynamic solutions of required reinforcement force for steep slopes using discretization-based kinematic analysis

This paper presents a procedure for assessing the reinforcement force of geosynthetics required for maintaining dynamic stability of a steep soil slope. Such a procedure is achieved with the use of the discretization technique and kinematic analysis of plasticity theory, i.e. discretization-based kinematic analysis. The discretization technique allows discretization of the analyzed slope into various components and generation of a kinematically admissible failure mechanism based on an associated flow rule. Accordingly, variations in soil properties including soil cohesion, internal friction angle and unit weight are accounted for with ease, while the conventional kinematic analysis fails to consider the changes in soil properties. The spatial–temporal effects of dynamic accelerations represented by primary and shear seismic waves are considered using the pseudo-dynamic approach. In the presence of geosynthetic reinforcement, tensile failure is discussed providing that the geosynthetics are installed with sufficient length. Equating the total rates of work done by external forces to the internal rates of work yields the upper bound solution of required reinforcement force, below which slopes fail. The reinforcement force is sought by optimizing the objective function with regard to independent variables, and presented in a normalized form. Pseudo-static analysis is a special case and hence readily transformed from pseudo-dynamic analysis. Comparisons of the pseudo-static/dynamic solutions calculated in this study are highlighted. Although the pseudo-static approach yields a conservative solution, its ability to give a reasonable result is substantiated for steep slopes. In order to provide a more meaningful solution to a stability analysis, the pseudo-dynamic approach is recommended due to considerations of spatial–temporal effect of earthquake input.     

Earth reinforcement using soilbags

This paper describes the method of earth reinforcement using soilbags and illustrates its application for case studies involving a pond and the expansive soil slope protection for a highway. The strength properties of soilbags were investigated using unconfined compression tests and bearing capacity tests on real soilbags containing either medium grained sands or gravels. The test results show that soilbags have high strength when subjected to an external load. This is primarily attributed to the mobilization of tensile forces in the bags. It is concluded that earth reinforcement using soilbags could substantially improve the bearing capacity of soft ground as well as minimizing deformation under working loads.     

高陡岩石边坡护坡机理及应用研究

以宜昌市某工程为例,对城市山体开挖形成的高陡岩石边坡加固及景观防护的特点进行了分析,并结合工程的地质条件及气候条件提出了三种边坡防护与加固的方案,通过比选,得出了最佳的方案,以达到最优的施工效果.     

一种新型框架预应力锚托板加固技术在高填方边坡工程中的应用及数值与监测分析

提出一种框架预应力锚托板加固技术,这种技术不仅施工方便快速,还可以有效提高高填方边坡的稳定性,并对边坡的位移和变形起到很好的控制作用。为了能够更好地了解框架预应力锚托板的加固效果,基于GeoStudio,结合实际监测数据,对比分析了有无锚托板时高填方边坡的坡肩位移、深层水平位移及稳定性,并对锚托板的锚固段轴力变化及边坡土压力分布规律进行了分析。