临近古建筑群硬岩地层深基坑锯切开挖施工技术研究

Research on the Sawing Excavation Construction Technology for the Deep Foundation Pit in Hard Rock Stratum Adjacent to the Ancient Buildings

随着我国城市地铁车站建设数量的增加,基坑开挖近接施工常遇到近接地铁车站、临近高层建筑、下穿综合交叉换乘车站等问题。当遇见硬岩地层且禁止使用爆破法进行基坑开挖作业时,受到开挖施工难度和施工成本的限制,传统基坑开挖施工技术已不再适用。为解决上述问题,文章以福州地铁2号线车站深基坑工程为依托,对硬岩地层深基坑开挖施工技术进行了研究。结果表明,该工艺有效降低了硬岩地层深基坑开挖对临近古建筑群的影响,确保了深基坑开挖施工安全,降低了环境噪声污染,提高了岩石切锯效率,节约了施工成本,为类似工程提供了一定的参考。

With the increase in the number of urban metro stations in China,the close construction of foundation pit excavation often meets the problems of approaching subway stations,being adjacent to the high-rise buildings,and underpassing comprehensive cross-transfer stations.When meeting the hard rock stratum and prohibiting the use of the blasting method for pit excavation operations,due to the excavation construction difficulty and construction cost limitations,the traditional pit excavation construction technology is no longer applicable.To solve the above problems,this paper takes the deep foundation pit project of line 2 of Fuzhou metro station as the basis and studies the deep foundation pit excavation construction technology of the hard rock stratum.The results show that the process effectively reduces the impact of deep foundation pit excavation in hard rock strata on the adjacent ancient architectural complexes,ensures the safety of deep foundation pit excavation construction,and reduces environmental noise pollution,improves the efficiency of rock cutting and sawing,saves the construction cost,and provides a certain reference for similar projects.