隧道浅埋暗挖施工工法对建筑物的影响分析

发布时间：2019-01-10 09:44

【摘要】：随着城市规模的扩大和城市形态的变化以及交通方式的立体发展,交通拥堵现象成为现代城市交通的常态,隧道工程等地下空间工程的开发与利用有效的解决城市交通拥挤问题,同时也存在一些问题,如地表沉降及对周边建筑物的损伤等问题。因此,本文在现有的研究基础上进行了以下几个方面的研究:(1)从隧道施工引起的地表沉降规律着手,阐述引起地表沉降各种影响因素,进而分析影响建筑物损伤的原因,论述了隧道模拟过程的理论依据。(2)在阐述青岛隧道施工所引发地表沉降对建筑物损伤规律的基础上。根据施工的特点,采用ABAQUS对不同施工工法隧道施工引发的地表沉降进行分析,由此得出双侧壁导坑法、CRD法、上下台阶法、全断面开挖法的沉降量是依次增大;从隧道开挖的地质条件、受力特点来看,最优选是双侧壁导坑法,依次分别是CRD法、上下台阶法、全断面开挖法,由此在选择施工方案的时候,需要综合考虑,分步越多,施工复杂,最终会影响围岩的整体性。(3)对隧道开挖引起建筑物沉降进行分析,运用Midas分析了地表框架结构在不同开挖工法过程中沉降形态,得出沉降量从大到小依次为:全断面法、上下台阶法、CRD法、双侧壁导坑法。通过地表沉降量与建筑物沉降量的对比,其沉降曲线相似,但是由于建筑结构刚度和建筑结构荷载的存在,地表变形与建筑变形引起的地表沉降量存在一定差异,但沉降差异不大,分别为0.28%、14.99%、15.2%、12.6%。(4)开挖前,对地表进行有效控制出发,根据当地水文地质条件,对青岛隧道施工措施加以优化,并给出对沿线建筑物损伤的防治措施。通过浅埋暗挖施工工法引发的沉降规律,验证了 Peck公式,对实际也起到一定的借鉴作用,对合理利用地下空间提供可参考的依据。
[Abstract]:With the expansion of urban scale, the change of urban form and the three-dimensional development of traffic mode, traffic congestion has become the norm of modern urban traffic. The development and utilization of underground space engineering, such as tunnel engineering, can effectively solve the problem of urban traffic congestion. At the same time, there are also some problems, such as surface subsidence and damage to surrounding buildings. Therefore, on the basis of the existing research, this paper studies the following aspects: (1) starting from the law of surface subsidence caused by tunnel construction, this paper expounds the various factors that affect the surface settlement, and then analyzes the reasons that affect the damage of buildings. The theoretical basis of tunnel simulation process is discussed. (2) on the basis of describing the law of building damage caused by ground subsidence caused by tunnel construction in Qingdao. According to the characteristics of construction, ABAQUS is used to analyze the surface subsidence caused by tunnel construction with different construction methods. From this, it is concluded that the settlement of double-sidewall tunnel method, CRD method, up-and-down step method, and full-section excavation method is increased in turn. According to the geological conditions and stress characteristics of tunnel excavation, the best choice is double-sidewall guide pit method, followed by CRD method, upper and lower step method, and full-section excavation method respectively. Therefore, when selecting construction plan, it needs to be considered comprehensively, and the more steps are taken into account, Complex construction will eventually affect the integrity of surrounding rock. (3) the settlement of buildings caused by tunnel excavation is analyzed, and the settlement patterns of surface frame structures in different excavation methods are analyzed by using Midas. The order of settlement from large to small is as follows: full section method, upper and lower step method, CRD method, double side wall guide pit method. The settlement curve is similar through the comparison between the surface settlement and the building settlement. However, due to the existence of the building structure stiffness and the building structure load, the surface settlement caused by the surface deformation and the building deformation is different to a certain extent. However, there is no significant difference in settlement, which is 0.28 and 14.99 respectively. (4) before excavation, the ground surface is effectively controlled and the construction measures of Qingdao Tunnel are optimized according to the local hydrogeological conditions. The measures to prevent and cure the damage of buildings along the route are also given. Through the settlement law caused by shallow excavation construction method, the Peck formula is verified, which can be used for reference in practice and can be used as a reference for rational utilization of underground space.
【学位授予单位】：山东科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U455.4

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