土工基础

土工基础 ›› 2021, Vol. 35 ›› Issue (6): 698-703.

• 工程实录 • 上一篇    下一篇

山区输电线路掏挖锚杆复合基础设计关键技术研究

张文翔1，邱昊茨2，李扬森3，崔 强4，张振华5   

  1.  (1.中国电建集团福建省电力勘测设计院有限公司，福州 350001；2.国网福建省电力有限公司泉州供电公司，福建泉州 362000;
    3.国网福建省电力有限公司，福州 350001；4.中国电力科学院有限公司，北京 102401；5.合肥工业大学土木与水利工程学院，合肥 230000)
  • 收稿日期:2021-09-13 修回日期:2021-09-25 出版日期:2021-12-30 发布日期:2021-12-24
  • 作者简介:张文翔(1960-)，男，博士，教授，研究方向为岩石力学试验。
  • 基金资助:
    重庆市科学基金重点资助项目(035679)；2002年高等学校博士学科点专项科研资助项目(20020183061)

Combination of Expanded Base Pier and Ground Anchor for Transmission Tower Foundations in Mountain Areas 

ZHANG Wenxiang1, QIU Haoci2, LI Yangsen3, CUI Qiang4， ZHANG Zhenhua5   

  1. (1.POWERCHINA Fujian Electric Power Engineering Co., Ltd., Fuzhou 350001；
    2.State Grid Fujian QUANZHOU Electric Power Supply Co. Ltd., Quanzhou 362000；
    3.State Grid Fujian Electric Power Co. Ltd., Fuzhou 350001；
    4.China Electric Power Research Institute, Beijing 102401；
    5.College of Civil Engineering, Hefei University of Technology, Hefei 230009)
  • Received:2021-09-13 Revised:2021-09-25 Online:2021-12-30 Published:2021-12-24

摘要： 山区掏挖岩石锚杆复合型基础的设计关键技术主要包括：设计方法，技术经济对比，标准化基础设计以及施工工序等方面。设计方法主要涉及承载力发挥系数的取值，结合数值模拟结果和目前试验结果，提出k1、k2的取值建议；在拟定的地质条件、基础作用力以及设计构造要求等技术条件下，分析掏挖锚杆复合基础、锚杆基础和挖孔基础的经济性，结果表明掏挖锚杆基础经济效益高；通过对掏挖～锚杆复合基础设计原则的确定，提出不同主柱直径下锚筋布置方式的建议；结合掏挖基础和锚杆基础施工特点，梳理掏挖锚杆复合基础的施工工序。通过罗源湾电厂～碧里220 kV线路工程中17%基础选用掏挖～锚杆复合基础的实践，表明该基础型式具有良好的经济，社会及环境效益。


关键词: 掏挖锚杆复合基础, 承载力发挥系数, 标准化基础设计, 施工工序

Abstract: The key construction procedures of the composite foundation of the expanded base pier and the rock anchor in mountainous areas include design method, installation and cost comparisons, standardized foundation design and construction procedures. The design method mainly involves the selection of the coefficient of bearing capacity. Based on the numerical simulation and the current test results, the suggestions for the selection of k1 and k2 are proposed in the paper. Under the local geological conditions, loads acting on the proposed foundations and state-of-the-practice construction conditions, the combination of expanded base pier with rock anchor is proved to be cost effective. Through the determination of design principles of expanded base pier part and anchor part, the suggestions of anchor reinforcement arrangement under different diameter of main pier are proposed. In the Luoyuan Bay Power Plant-Bili 220 kV power transmission line project, 17% of the foundations are composite foundation of expanded base pier with rock anchor, the result shows that this composite foundation receives cost, social and environmental benefits.

Key words: expanded based pier with rock anchors, coefficient of bearing capacity, standardized foundation design, construction procedures

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