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矿震对基坑邻近建筑物影响数值模拟分析

发布时间:2019-01-11 15:11  文章来源:笔耕文化传播
【摘要】:随着我国经济、社会的不断发展,城市面积不断扩大,土地资源和自然资源越来越紧张,人们对能源的需求也在不断增长。于是,越来越多的高层建筑拔地而起,能源消耗的数字被不断刷新。在矿产资源型城市,每天都在进行着城区老旧建筑物的拆除、周边建筑物的新建及地下煤矿的开采,而伴随着采矿作业所产生的矿震也随着开采频率与开采量的增加而愈发频繁。高层建筑和地下工程的施工往往需要进行基坑开挖工程,基坑开挖的规模和深度不断增加。许多基坑工程位于城市的建筑密集区,紧临已有建筑物或构筑物的基础,基坑的开挖与支护不仅关系到基坑本身的安全,也关系到相邻建筑物的安全。另外,矿山地震对周边建筑物构成的危害也越来越受到关注。虽然矿震强度不大,震源浅,但分布广,发生频繁,可能造成人员伤亡和财产损失,因此矿震所引发的次生灾害已成为人们较为关注的一大灾害。本文以阜新地区典型工程地质条件下的基坑及建筑结构为例,采用数值模拟的方法,分析了与基坑相邻的某框架结构建筑物,在与基坑不同距离的情况下,基坑开挖及矿山地震引起的建筑结构的变形和内力变化规律。本文在总结前人研究成果的基础上,对在矿震作用与基坑开挖工程引起的邻近建筑物的变形和内力变化等进行了总结。将基坑、坑边土体和相邻建筑物作为一个整体系统,运用有限元软件ANSYS,分析了矿震作用下基坑开挖过程中相邻建筑结构的变形规律,计算分析了框架结构在基坑开挖前后和矿震作用下的内力变化规律,研究了矿震作用下的基坑开挖工程对邻近建筑物的影响;找出了矿震作用下基坑开挖工程对邻近建筑物的影响规律,为实际工程的设计和施工提供参考,并对今后相关的数值模拟分析及其研究具有一定的参考价值。
[Abstract]:With the development of our economy and society, the urban area is expanding, the land resources and natural resources are more and more tense, and the demand for energy is also increasing. As a result, more and more high-rise buildings, energy consumption figures are constantly refreshed. In mineral resource-based cities, the demolition of old buildings in urban areas, the construction of surrounding buildings and the mining of underground coal mines are going on every day. With the increase of mining frequency and mining quantity, the ore shock caused by mining is becoming more and more frequent. The excavation of foundation pit is often needed in the construction of high-rise building and underground engineering, and the scale and depth of excavation are increasing. Many foundation pit projects are located in the built-up area of the city, and are close to the foundation of existing buildings or structures. The excavation and support of foundation pit not only relate to the safety of the foundation pit itself, but also to the safety of adjacent buildings. In addition, more and more attention has been paid to the damage caused by mine earthquakes to surrounding buildings. Although the intensity of mine earthquake is small and the source is shallow, it is widely distributed and occurs frequently, which may cause casualties and property losses. Therefore, the secondary disaster caused by mine earthquake has become a major disaster that people pay more attention to. Taking the foundation pit and building structure under typical engineering geological conditions in Fuxin area as an example, a frame structure building adjacent to the foundation pit is analyzed by numerical simulation under different distance from the foundation pit. Deformation and internal force variation of building structure caused by excavation of foundation pit and mine earthquake. On the basis of summarizing the previous research results, this paper summarizes the deformation and internal force change of adjacent buildings caused by the action of mine earthquake and excavation of foundation pit. In this paper, the deformation law of adjacent building structures during excavation is analyzed by using finite element software ANSYS, which takes the foundation pit, pit soil and adjacent buildings as an integral system. The internal forces of frame structure before and after excavation and under the action of mine earthquake are calculated and analyzed, and the influence of excavation of foundation pit under mine earthquake on adjacent buildings is studied. The influence law of foundation pit excavation on adjacent buildings under the action of mine earthquake is found out, which provides a reference for the design and construction of practical engineering, and has a certain reference value for the relevant numerical simulation analysis and research in the future.
【学位授予单位】:辽宁工程技术大学
【学位级别】:硕士
【学位授予年份】:2015
【分类号】:TU753

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