查看论文信息

查看全文

免费浏览

查看论文信息

阅读器下载

论文中文题名：

超高衡重式挡土墙土压力分布规律及工程应用研究

姓名：

张宝元

学号：

G11136

保密级别：

公开

论文语种：

chi

学生类型：

硕士

学位年度：

2020

培养单位：

西安科技大学

院系：

建筑与土木工程学院

专业：

建筑与土木工程

研究方向：

边坡支护

第一导师姓名：

谷拴成（校内）徐拴海（校外）

论文外文题名：

Study on the Distribution of Earth Pressure of Super High Balance Weight Retaining Wall and Its Engineering Application

论文中文关键词：

衡重式挡土墙 ; 土压力分布 ; 现场监测 ; 水平位移 ; 规律研究

论文外文关键词：

Balance Weight Retaining Wall ; Earth Pressure Distribution ; on-site Monitoring ; Horizontal Displacement ; Research on Regular Pattern

论文中文摘要：

随着我国西部建设的发展，出现了大量的边坡防护工程。超高衡重式挡土墙作为边坡支护的一种形式，因其墙后土压力分布规律尚不清楚而导致工程设计存在疑问，因此本文基于黔桂天能循环经济型煤焦化扩建项目中衡重式挡土墙支护工程，通过现场监测和理论分析相结合的手段，开展了超高衡重式挡土墙土压力分布规律及工程应用研究，得到了以下主要结论：

（1）分析总结了现有衡重式挡土墙土压力计算及设计理论，根据实际工程项目特点及地质情况，比较了几种边坡支护方案，最终选择了超高衡重式挡土墙支护。采用大型三轴剪切试验对边坡土层进行了力学分析，得到了该边坡支护设计的力学参数，然后根据现有设计理论对该衡重式挡土墙进行了设计计算。

（2）现场监测了衡重式挡土墙基底压力，监测结果表明：随着下墙浇筑高度的增加，挡土墙基底压力呈线性增加，基底压力呈“马鞍形”形分布；开始浇筑上墙后，挡土墙重心逐步前移，基底压力由“马鞍形”逐步调整为“倒Z形”。

（3）通过衡重式挡土墙墙后土压力现场监测及理论分析，开展了衡重式挡土墙土压力分布规律研究，研究表明：与直线型墙背挡土墙相比，衡重台起到了改变土压力分布的作用，“遮帘”作用更为显著；衡重式挡土墙墙后土压力为“上墙三角形-下墙抛物线”特征；实测所得土压力合力值与理论计算值大小相近，但实测土压力的合力作用点比理论计算值低。

（4）基于现场监测衡重式挡土墙水平位移发现该项目边坡支护具有显著的空间效应，衡重式挡土墙的墙顶水平位移分布模式为“中部大、两端小”。

﹀

论文外文摘要：

With the development of construction in Western China, a large number of slope protection projects have emerged. As a form of slope support, the distribution of earth pressure behind the retaining wall is not clear, which leads to the doubt of engineering design, Therefore, this paper is based on the balance weight retaining wall support project of Tianneng coal coking expansion project, Through the combination of on-site monitoring and theoretical analysis, the research on the earth pressure distribution law and engineering application of super high balance weight retaining wall is carried out, and the following main conclusions are obtained:

(1) This paper analyzes and summarizes the existing calculation and design theory of the earth pressure of the balance weight retaining wall, compares several slope support schemes according to the characteristics of the actual project and geological conditions, and finally selects the super high balance weight retaining wall support. Based on the large-scale triaxial shear test, the mechanical analysis of the soil layer of the slope is carried out, and the mechanical parameters of the slope support design are obtained.

(2) The monitoring results show that: with the increase of the pouring height of the lower wall, the base pressure of the retaining wall increases linearly, and the distribution of the base pressure is "saddle shaped"; after the pouring of the upper wall, the gravity center of the retaining wall gradually moves forward, and the base pressure gradually adjusts from "saddle shaped" to "inverted Z-shaped".

(3) Based on the field monitoring and theoretical analysis of earth pressure behind the counterweight retaining wall, the distribution law of earth pressure on the balance weight retaining wall is studied. The results show that, compared with the straight-line retaining wall, the balance platform plays a role in changing the earth pressure distribution, and the "covering" effect is more obvious; the earth pressure behind the counterweight retaining wall is characterized by "upper wall triangle lower wall parabola" The value of resultant force of earth pressure is close to that of theoretical calculation, but the action point of resultant force of measured earth pressure is lower than that of theoretical calculation.

(4) Based on the field monitoring of the horizontal displacement of the balance weight retaining wall, it is found that the slope support of the project has a significant spatial effect, and the distribution mode of the horizontal displacement of the top of the balance weight retaining wall is "large in the middle and small at both ends".

﹀

中图分类号：

TU432

开放日期：

2020-07-27

附件下载