# 基于理正软件研究工程边坡的稳定性Research on the Stability of Engineering Slope Based on Lizheng Software

DOI: 10.12677/HJCE.2021.107074, PDF, HTML, XML, 下载: 48  浏览: 95

Abstract: In the development of the city, the limited urban space requires the development of underground space. In the construction of the project, the excavation of deep foundation pits will inevitably be encountered. Therefore, the stability of the slope after the excavation of the foundation pit during the construction process Sex is a very important safety issue. This paper uses the method of controlled variables and the Lizheng rock-soil slope stability analysis system to numerically calculate the four factors that affect the stability of the slope, and conduct sensitivity analysis on them, so as to find the sensitive factors of slope instability. Provide important theoretical support for the quality and safety of project engineering.

1. 引言

2. 基本理论

$K=\frac{\sum \left(Cl+W\mathrm{cos}\theta tg\phi \right)}{\sum W\mathrm{sin}\theta }$

K——整个滑体剩余下滑力计算的安全系数；

L——单个土条的滑动面长度(m)，l = bsecθ；

W——条块重力(kN)，浸润线以上取重度，以下取饱和重度；

Θ——条块的重力线与通过此条块底面中点半径之间的夹角(度)；

C、 $\phi$ ——土的抗剪强度指标，采用总应力法时，取总应力指标，采用有效应力法时，取有效应力指标。

3. 边坡稳定性分析

3.1. 坡脚角度与稳定性系数的关系 [10]

Table 1. Slope stability check calculation parameters (constant variable)

Table 2. Slope stability coefficient under different slope angle β

Figure 1. The influence of the change of slope angle β on the stability coefficient

Figure 2. Fitting diagram of slope angle β to stability coefficient

$y=-2.176\mathrm{ln}\left(x\right)+12.363$

3.2. 边坡高度与稳定性系数的关系

Table 3. Slope stability check calculation parameters (constant variable)

Table 4. Slope stability coefficient under different slope heights

Figure 3. The influence of the change of slope height H on the stability coefficient

Figure 4. Fitting diagram of slope height H to stability coefficient

$y=19.893{x}^{-0.751}$

3.3. 岩(土)体抗剪强度指标与稳定性系数的关系

3.3.1. 内摩擦角Φp

Table 5. Slope stability check calculation parameters (constant variable)

Table 6. Lizheng rock-soil slope stability calculation and analysis results

Figure 5. The influence of the change of the internal friction angle Φp on the stability coefficient

Figure 6. The fitting diagram of the internal friction angle Φp to the stability coefficient

$y=2.6472{\text{e}}^{0.0093x}$

3.3.2. 粘聚力Cp

Table 7. Slope parameters

Table 8. Calculation and analysis results of slope stability

Figure 7. The influence of the change of cohesion Cp on the stability coefficient

Figure 8. Cohesion Cp vs. stability coefficient fitting diagram

$y=0.0284x+0.6769$

3.3.3. 内摩擦角与粘聚力对边坡稳定性系数的影响

Figure 9. The influence of cohesion Cp and internal friction angle Φp on the stability coefficient

Figure 10. Cohesion force Cp and internal friction angle Φp fitting diagram to the stability coefficient

4. 结论与分析

1) 滑坡形成的外因：

2) 滑坡形成的内因：

NOTES

*通讯作者。

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