大断面地下水封石油洞库储油洞室稳定性模拟

1. 中国石油管道局工程有限公司设计分公司;2. 中国石油管道局工程有限公司第四分公司; 3. 中国石油管道局工程有限公司燃气分公司

整体稳定性;位移判据;应力判据;Hoek-Brown 准则

Stability simulation on the oil storage caverns of large-section underground water-sealed oil storages
ZHANG Chengbin1, ZHANG Yaqin2, HU Moupeng1, YANG Songtao3

1. China Petroleum Pipeline Engineering Co. Ltd. (Engineering); 2. No.4 Branch Company, China Petroleum Pipeline Engineering Co. Ltd.; 3. Gas Branch of China Petroleum Pipeline Engineering Co. Ltd.

global stability, displacement criterion, stress criterion, Hoek-Brown criterion

备注

由于深埋地下洞室的高地应力对洞室稳定性影响很大,洞室的稳定性、耐久性对所储油品的密封极为重要,且洞室的稳定性关系到整个项目的 成败。依托辽宁某真实地下水封石油洞库工程,对其稳定性进行FLAC3D 数值分析,研究储油洞室在实际施工开挖工况下的稳定性,并从围岩应力和位移变形两方面研究无支护和有支护两种工况下洞室的稳定性。结果 表明:储油洞室处的围岩均没有超出岩石的抗压强度,拉应力的大小和区域也满足要求。通过模拟分析得到了洞室在开挖过程中的薄弱部位,应该在设计和施工中加强支护及监控量测。研究成果为大断面地下水封石油洞库储油洞室稳定性的研究提供了理论依据。(图7表2,参[23]

The high ground stress of deep underground cavern has a great influence on its stability, the stability and endurance of a cavern is quite important for the sealing of the oil products stored in it, and its stability is crucial to the success of the whole project. In this paper, one real underground water-sealed oil storage project in Liaoning was taken as an example. Its stability was numerically analyzed by FLAC3D. The stability of the oil storage cavern in the actual working condition of excavation was analyzed. In addition, the stability of the cavern with and without support was analyzed from the aspects of surrounding rock stress and displacement deformation. It is shown that the surrounding rocks of the oil storage cavern don’t exceed the compression strength of the rock and the size and region of the tensile stress satisfy the requirements. By virtue of simulation analysis, the weak positions of the cavern in the process of excavation are identified. It is suggested to strengthen the support and monitoring & measuring on these weak points during design and construction. The research results provide the theoretical basis for the studies on the stability of oil storage caverns of large-section underground water-sealed oil storages. (7 Figures, 2 Tables, 23 References)