土工基础

土工基础 ›› 2020, Vol. 34 ›› Issue (2): 168-170.

• 专题论述 • 上一篇    下一篇

粉质黏土与混凝土结构接触面的力学特性研究

孙利成，胡建林，于 海，王盼盼   

  1. （河北建筑工程学院,河北张家 075000）
  • 收稿日期:2019-06-08 修回日期:2019-06-26 出版日期:2020-05-20 发布日期:2020-05-20
  • 作者简介:孙利成(1995-),男，硕士研究生，研究方向为桩与土的相互作用。
  • 基金资助:
    河北建筑工程学院校级基金项目 (XB201918)

Interface Properties between Silty Clay and Concrete

SUN Licheng, HU Jianlin, YU Hai, WANG Panpan   

  1. (School of Civil Engineering, Hebei University of Architecture, Zhangjiakou 075000)
  • Received:2019-06-08 Revised:2019-06-26 Online:2020-05-20 Published:2020-05-20

摘要： 为了研究粉质黏土与混凝土接触面作用的力学特性规律，运用大型直剪仪进行了粉质黏土与混凝土接触面的直剪试验，得到了在不同法向应力（5 kPa、20 kPa、50 kPa、100 kPa、150 kPa）下，土体的不同含水率（12%、14%、16%）对力学特性的影响。结果表明：(1)在同一含水率条件下，桩土接触面的抗剪强度随着法向应力的增大而呈现同幅度增大。(2)在同一法向应力条件下，随着含水率的增加，抗剪强度及初始切线模量呈现下降的趋势。(3)粉质黏土与混凝土接触面抗剪强度满足摩尔-库伦强度准则。

关键词: 接触面, 直剪试验, 应力-应变关系, 应力-位移曲线

Abstract: In order to study the mechanical properties between silty clay and concrete interface, a series of interface direct shear tests were performed by using a large direct shear apparatus. The interface properties were obtained under different normal stresses (5 kPa, 20 kPa, 50 kPa, 100 kPa and 150 kPa) as well as different moisture contents (12%, 14% and 16%). The following conclusions can be obtained: 1) under the same moisture content, the shear strength at the pilesoil interface increases with the increase of normal stress; 2) under the same normal stress; both the shear strength and the initial tangent shear modulus decreases with the increase of the moisture content; 3) The MohrCoulomb relationship can be used to describe the interface behavior between the silty clay and concrete.

Key words: interface properties;direct shear test, stress-strain relationship, stressdisplacement curves

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