土工基础

›› 2014, Vol. 28 ›› Issue (2): 68-70.

• 工程实录 • 上一篇    下一篇

麻竹高速公路边坡加固中的格构锚固优化研究

黄槐轩1，黄志刚1，汪 斌2，朱杰兵2   

  1. (1. 湖北交投襄随高速公路建设指挥部，湖北宜城 441400；  2.长江科学院 水利部岩土力学与工程重点实验室，武汉 430010）
  • 收稿日期:2013-02-27 出版日期:2014-04-21 发布日期:2014-04-25
  • 作者简介:黄槐轩（1963-），男，高级工程师，研究方向为高速公路路桥技术及公路建设管理。
  • 基金资助:

    基金项目：交通运输部科技项目（2009353342530）、国家自然科学基金项目（41272350、51209020）

Optimization of Ground Anchor with Lattice Beam in MaZhu HighwaySlope Protections

HUANG Huaixuan1， HUANG Zhigang1， WANG Bin2, ZHU Jiebing2   

  1. (1. Hubei Provincial Communications Investment Co., Ltd. Yicheng Hubei 441400;
    2. Key Laboratory of Geotechnial Engineering, Ministry of Water Resources,Yangtze River Scientific Research Institute，Wuhan 430010)
  • Received:2013-02-27 Online:2014-04-21 Published:2014-04-25

摘要： 格构锚杆（锚索）组合加固技术兼顾深层加固与浅层护坡，在高速公路路堑高边坡防护中被广泛采用。针对格构梁优化设计中的一些问题，采用十字交叉格构节点处荷载分配方法，将坡面假定为弹性地基，运用Winkler弹性地基梁理论进行格构梁内力对格构梁的形态参数(间距、截面尺寸、悬臂情况等)的敏感性分析。研究表明：地基梁剪力和弯矩的差异主要表现在边跨上，靠近中间部分弯矩趋于一致；梁的弯矩要比剪力对截面尺寸、间距更为敏感；格构梁的设计应选截面较高、间距稍小、两端悬臂且大约为间距1/3的地梁。研究成果对格构锚固的参数优化具有一定的参考价值。

关键词: 格构锚梁, 路堑边坡加固, 优化设计, 文克尔弹性基础梁理论

Abstract: Ground anchor with lattice beam is a slope stabilization technique that is the combination of deep strengthening and shallow erosion prevention. This technique has been widely applied in the highway cut slopes and embankments. In the lattice beam design, the proposed method uses the tributary area at each node at the cross. The slope is assumed to be the elastic soil foundation. The dimensions (spacing, sectional properties, cantilever condition) of the lattice beam can be determined by using the Winkler Elastic Theory. The analytical results indicate that the differences in shear force and bending moments are at side spans. The bending moment tends to be constant in the mid spans. The bending moment in the lattice beam is more sensitive to the dimensions comparing with the shear force. The suggested section properties of the lattice beams are: higher height to width ratio, smaller spacing, and the length of the cantilever beam should be 1/3 of the spacing.

Key words: Ground Anchors with Lattice Beams, Embankment and Cut Slope Stabilization, Optimization design, Winkler Elastic Beam Theory