道路采空区强夯法与注浆法处治对比研究

发布时间：2018-01-29 22:38

本文关键词： 采空区无损检测强夯法注浆法　出处：《郑州大学》2017年硕士论文　论文类型：学位论文

【摘要】：近些年,随着道路工程的发展,一些新建公路难免要通过煤矿的采空区,采空区的治理研究对公路的建设有着非常重要的意义。受下伏采空区的影响,路基填筑过程中局部会出现塌陷,本文依托实际工程,具体分析了采空区勘察与探测手段,在对采空区上方路基沉降数值模拟计算,提出综合治理加固的建议,取得一定研究成果。本论文主要内容如下:(1)依托河南省省道323线新密关口至登封张庄段工程现场,对塌陷段使用高密度电法、浅层地震法进行无损探测,结合实际路段钻探图对探测结果进行分析,对道路路床与采空区分布的相对位置进行分类。(2)根据不同采空区与道路路床的相对位置,选取平缓分布的采空区为特例,结合工程地质背景,使用有限元分析软件Plaxis进行数值分析。计算下伏采空区,模拟使用注浆法引起的路基固结沉降,结果表明:注浆处理过后,整体的沉降量相比未处理之前有所减小,起到路床抬升的作用,对于路床及岩层整体处治效果较好。(3)根据探测采空区的位置形状范围,模拟了强夯法的夯沉影响,强夯法对于夯击层沉降固结较快,对靠近采空区的区域有影响,可以快速实施路床固结沉降。并根据不同的采空区与道路路床的相对位置关系,分别采用注浆法和强夯法处治,给出比较合理的综合处治建议。
[Abstract]:In recent years, with the development of road engineering, some new highways will inevitably pass through the goaf of coal mine. The study of goaf governance is of great significance to the construction of highway. Local collapse will occur in the process of subgrade filling. Based on actual engineering, this paper analyzes the survey and detection means of goaf, calculates the settlement of roadbed above goaf by numerical simulation, and puts forward the suggestion of comprehensive treatment and reinforcement. The main contents of this paper are as follows: 1) relying on the project site from Xinmi pass of Henan Provincial Highway 323 to Zhangzhuang section of Dengfeng, the high-density electrical method is used for the collapse section. Non-destructive detection is carried out by shallow seismic method, and the results are analyzed in combination with actual section drilling drawings. According to the relative position of different goaf and road bed, the smooth distribution of goaf is selected as a special case, combined with engineering geological background. The finite element analysis software Plaxis is used to calculate the goaf and simulate the consolidation settlement of roadbed caused by grouting method. The results show that: after grouting treatment. The settlement of the whole is smaller than that before the treatment, which plays the role of roadbed uplift, and the overall treatment effect of the roadbed and rock layer is better. 3) according to the shape range of the location of the detected goaf. The influence of dynamic compaction method on the settlement and consolidation of the rammed layer is faster and the area near the goaf is affected by the dynamic compaction method. The consolidation and settlement of road bed can be carried out quickly. According to the relative position relationship between different goaf and road bed, grouting method and dynamic compaction method are adopted respectively, and some reasonable comprehensive treatment suggestions are given.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U416.1

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