General Technology Group Engineering Design Co. , Ltd.

地基稳定性直接决定了采煤沉陷区光伏电站项目的可行性和运行长久性,以采煤沉陷区光伏电站建设项目为背景,按照地表变形敏感程度将建(构)筑物分为三类,归纳了地基沉降变形的主要来源,确定了采煤沉陷区建设光伏电站工程荷载影响深度,融合土力学分析法与概率积分法计算了光伏电站累计沉降变形,并分别采用现行规范和非线性模糊综合评价法开展了地基稳定性分析,最后指出了两种地基稳定性分析方法对光伏电站在采煤沉陷区建设的适用条件。结果表明:荷载影响深度判别标准的选取应依据设施结构抗变形能力与采空区赋存条件综合选取,高耸构筑物及复杂采空区地基宜用高判别标准;土力学分析法和概率积分法计算的光伏电站建设沉降量分别为164.2mm、1291.8mm,该工程地基沉降主要为采空区地表残余变形;现行规范与非线性模糊综合评价法均适用于面状对象,但对于高压输电线塔等点状对象,后者更加适用;非线性模糊综合评价结果与现场实际更为一致,证明该方法可有效评价采煤沉陷区光伏电站地基稳定性。

The stability of the foundation directly determines the construction and long-term operation of photovoltaic power station project. We took photovoltaic power station project in a coal-mining subsidence area in southwest Shandong Province as background, divided buildings (structures) into three types according to the sensitivity of surface deformation, summarized the main sources of foundation settlement deformation, determined the depth of influence of the load of photovoltaic power station construction in coal-mining subsidence area, and calculated the cumulative settlement deformation of photovoltaic power station by combining soil mechanics analysis and probability integral method. We used the current standard and nonlinear fuzzy comprehensive evaluation method separately, to analyze the foundation stability, and found the the applicable conditions of the two methods for photovoltaic power stations construction in coal mining subsidence areas. The results show that: the selection of the criterion for the depth of load influence should be based on the deformation resistance of the facility structure and the occurrence conditions of the goaf, and the high criterion should be used for the high - rise structures and complex goaf foundations. The settlement amount of photovoltaic power station construction calculated based on soil mechanics analysis method and probability integral method is 164. 2 mm and 1291. 8 mm, respectively, and the foundation settlement is mainly the surface residual deformation of the goaf. The foundation stability evaluation methods of current standard and nonlinear fuzzy comprehensive evaluation are both suitable for planar objects, but for point objects such as high-voltage transmission lines, the later one is better. The result of nonlinear fuzzy comprehensive evaluation of foundation stability is more consistent with the field practice of this project, which proves its feasibility and effectiveness in foundation stability evaluation of photovoltaic power station projects in coal mining subsidence area.

彭雷祥, 杨向升, 华 祥. 采煤沉陷区光伏电站地基沉降及稳定性研究 [J]. 煤炭工程, 2023, 55(11): 1-6.