土工基础

›› 2014, Vol. 28 ›› Issue (5): 63-65.

• 工程实录 • 上一篇    下一篇

风化岩地区土钉墙支护设计与施工若干问题探讨

刘 琦1，杜鹏祥2   

  1. (1．辽宁省建筑设计研究院岩土工程公司，沈阳 110005；2．沈阳建筑大学土木工程学院，沈阳 110168)
  • 收稿日期:2013-11-26 出版日期:2014-10-20 发布日期:2014-10-28
  • 作者简介:刘琦（1986-），男，研究方向为岩土工程设计施工。

Discussions of Soil Nailing Wall Design and Construction in Weathered Rock Zones

LIU Qi1, DU Pengxiang2   

  1. （1.Geotechnical Engineering Co., Liaoning Provincial Building Design and Research Institute, Shenyang 110005；
    2.College of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168）
  • Received:2013-11-26 Online:2014-10-20 Published:2014-10-28

摘要： 结合工程经验与规范中的规定，说明岩体内摩擦角φk的确定方法，并利用单轴应力条件下的摩尔—库伦准则来反算岩体的粘聚力ck，利用该方法确定的岩体工程设计参数进行土钉墙支护方案的设计计算；通过工程实例说明风化岩地区钢管式土钉可打入深度与标准贯入试验锤击数之间的关系，为工程设计人员在确定钢管式土钉设计长度时提供参考；提出土钉墙支护在北方严寒地区应用时考虑到冻胀作用影响下应采取的措施。

关键词: 风化岩, 土钉墙, 钢管土钉, 冻胀作用

Abstract: This paper presents the results of determination of the internal friction angle of the rock mass based on the project experience and the design code requirements. The cohesion of the rock mass is back analyzed by using the MohrCoulomb criterion under uniaxial stress. The design parameters of the rock mass are used in the soil nailing wall supporting design. The hollow soil nails' penetration depth is correlated with the blow counts of the Standard Penetration Test. This empirical relationship provides a reference value for the design of the required length for the hollow soil nails. The paper also presents the engineering considerations for the soil nail applications in the cold regions that are affected by the freeze expansions.

Key words: Weathered Rock, Soil Nailing Wall, Hollow Soil Nails, Freeze Expansions