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研究目的:随着西安经济不断发展,城镇化速率不断推进,超高层建筑不断涌现,伴随着出现了大量深基坑工程。基坑开挖降水引起大范围地面沉降,导致周围建筑物受到不同程度的损坏,造成不必要的财产损失。因此,有必要在降水工作展开前预先对建筑物损坏程度做出评估,为施工管理和决策提供可靠的建议,及时规避风险。研究结论:(1)采用目标层次分析法,构建科学、合理的递阶层次结构;(2)目标层次分析法和模糊数学相结合的综合评价法实现了对周边建筑物损坏程度的有效评判;(3)该方法的操作性与实用性优于传统经验法,降低了主观臆断性,可为施工管理方提供可靠的决策建议,及时规避风险,也可为建筑物预先加固提供参考;(4)目标层次分析法和模糊数学相结合的综合评价方法为西安地区基坑开挖降水对周边建筑物损坏评价提供了新途径,具有一定推广价值。
Research purposes: With the continuous development of economy in Xi’an, the rate of urbanization has been continuously promoted, and the emergence of super high-rise buildings has emerged with a large number of deep foundation pit projects. Precipitation in foundation pit causes a large area of land subsidence, resulting in different degrees of damage to the surrounding buildings, resulting in unnecessary loss of property. Therefore, it is necessary to evaluate the extent of building damage in advance before the commencement of precipitation work, provide credible suggestions for construction management and decision-making, and avoid risks in time. Research conclusions: (1) Objective-level analytic hierarchy process (AHP) is used to construct a scientific and reasonable hierarchical structure; (2) A comprehensive evaluation method based on AHP and fuzzy mathematics can effectively judge the degree of damage to surrounding buildings; (3) The method is more practical and practicable than the traditional empirical method, reducing subjective assumptions, providing reliable decision-making advice to construction managers, avoiding risks in time and providing reference for pre-reinforcement of buildings. ) The method of AHP combined with fuzzy mathematics provides a new way to evaluate the damage of surrounding buildings caused by excavation and excavation of foundation pit in Xi’an area and has certain promotion value.