论文部分内容阅读
黏性土渠道的运行期,挖方边坡比填方边坡更容易发生滑坡。土的密度愈大,开挖愈深,则挖方渠道边坡在运用过程中膨胀和强度降低愈多,其失稳的可能性就愈大。膨胀土加剧了强度降低的幅度。开裂硬黏土既加快强度降低的速度又加大软化区域。在边坡表面设置护坡不但能有效地防止即使是分散性黏土的淘刷,还在不同程度上抑制或推迟表层滑坡和粉土的冻胀。文中建议的确定挖方渠坡抗剪强度的方法与国内流行方法略有差别。
During the operation of cohesive soil channels, excavation of slope is more prone to landslide than fill slope. The greater the density of soil, the deeper the excavation, the excavation of the slope of the channel expansion and strength in the course of use more, the greater the likelihood of instability. Expansive soil exacerbates the magnitude of the decrease in strength. Cracking hard clay not only accelerates the rate of strength reduction but also softens the area. Setting slope protection on slope surface not only can effectively prevent even the scouring of dispersive clay, but also restrain or delay the frost heave of surface landslide and silt to some extent. The proposed method to determine the shear strength of excavation canal slope is slightly different from the domestic popular method.