深埋储能洞室的力学特性及抗震性能研究

发布时间：2019-01-05 11:16

【摘要】：20世纪是地上的时代,21世纪是地下的时代。随着人民生活水平的提高,新型技术的革新,地下空间开发与利用早已进入了工程师的视野。水力发电依旧是发展中国家电力来源的重要方式,水力发电厂结构配置里不可或缺的包括深埋地下空间、洞室等。将过剩电力利用空气压缩机把空气介质压缩成一定压强的气体储存于洞室中是目前发电厂设计的重要组成部分。因此,地下储气构造物是压气储能(CAES)电站选址的决定因素。基于深埋地下储能洞室在水力发电厂中的重要性,本文选择了不同埋深、不同截面形状、不同截面尺寸、不同间距的洞室进行静力学计算。同时,地震作用下深埋储气构筑物的力学性能是值得工程师关注和研究的。因此,本文选择不同埋深、不同截面形状、不同截面尺寸、不同间距的洞室利用汶川卧龙站测取的前20s地震波进行动力学计算。本文主要研究成果主要有以下几点:(1)静力条件下,洞室埋深对洞室力学特性影响较大,适宜埋深为300m,洞室截面尺寸对洞室力学特性影响较小,洞室截面形状对洞室力学特性影响较大,圆形洞室优于马蹄形洞室,洞室间距大于三倍洞径时对洞室力学特性影响小。(2)动力作用下,洞室埋深对洞室动力学特性影响较大,适宜埋深为300m,洞室截面尺寸对洞室动力学特性影响较小,洞室截面形状对洞室动力学特性影响较大,圆形洞室优于马蹄形洞室,洞室间距大于三倍洞径时对洞室动力学特性影响小,洞室间距大于六倍洞径时可忽略洞室间距的影响。(3)基于模糊数学分析方法,圆形洞室稳定性优于马蹄形洞室。
[Abstract]:The 20th century is the age of the earth and the 21st century is the age of the underground. With the improvement of people's living standard and the innovation of new technology, the development and utilization of underground space has already entered the field of vision of engineers. Hydropower is still an important source of power in developing countries. It is an important part of power plant design to compress the air medium into a certain pressure gas and store it in the chamber by using the air compressor. Therefore, the underground gas storage structure is the decisive factor for the location of the pressurized gas storage (CAES) power station. Based on the importance of deep buried underground energy storage caverns in hydropower plants, the static calculation of caverns with different buried depths, different cross-section shapes, different cross-section sizes and different spacing is carried out in this paper. At the same time, the mechanical properties of deep buried gas storage structures under earthquake are worthy of attention and study by engineers. Therefore, the caverns with different buried depth, different section shape, different section size and different spacing are selected to calculate the dynamics of the caverns by using the first 20s seismic wave measured by Wulong station in Wenchuan. The main results of this paper are as follows: (1) under the static condition, the depth of the cavity has a great influence on the mechanical properties of the cavern, and the suitable depth is 300m, and the section size of the cavern has little effect on the mechanical properties of the cavern. The shape of section has a great influence on the mechanical properties of the cavern. The circular cavity is superior to the horseshoe cavity. When the space between the cavities is larger than three times the diameter of the cavity, the influence on the mechanical properties of the cavern is small. (2) under the dynamic action, The depth of the cavity has a great influence on the dynamic characteristics of the cavern, the suitable depth is 300m, the section size of the cavity has little effect on the dynamic characteristics of the cavern, the shape of the section of the cavern has a great influence on the dynamic characteristics of the cavern, and the circular cavern is superior to the horseshoe cavern. The influence of cavern spacing greater than three times diameter has little effect on the dynamic characteristics of cavities, while the influence of cavities spacing greater than six times diameter can be neglected. (3) based on fuzzy mathematical analysis, the stability of circular cavities is better than that of horseshoe caverns.
【学位授予单位】：湖北工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TV31

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