吕高乐, 易领兵, 王宝, 盖文, 余巍巍, 吕新春. 2018: 黄河冲积平原复杂地质环境下双排桩支护结构的深基坑监测分析. 工程地质学报, 26(s1): 730-739. DOI: 10.13544/j.cnki.jeg.2018265
    引用本文: 吕高乐, 易领兵, 王宝, 盖文, 余巍巍, 吕新春. 2018: 黄河冲积平原复杂地质环境下双排桩支护结构的深基坑监测分析. 工程地质学报, 26(s1): 730-739. DOI: 10.13544/j.cnki.jeg.2018265
    LÜ Gaole, YI Lingbing, WANG Bao, GE Wen, YU Weiwei, LÜ Xinchun. 2018: MONITORING AND ANALYSIS OF DEEP FOUNDATION PIT WITH DOUBLE ROW PILES SUPPORTING STRUCTURE UNDER COMPLICATED GEOLOGICAL ENVIRONMENT IN ALLUVIAL PLAIN OF THE YELLOW RIVER. JOURNAL OF ENGINEERING GEOLOGY, 26(s1): 730-739. DOI: 10.13544/j.cnki.jeg.2018265
    Citation: LÜ Gaole, YI Lingbing, WANG Bao, GE Wen, YU Weiwei, LÜ Xinchun. 2018: MONITORING AND ANALYSIS OF DEEP FOUNDATION PIT WITH DOUBLE ROW PILES SUPPORTING STRUCTURE UNDER COMPLICATED GEOLOGICAL ENVIRONMENT IN ALLUVIAL PLAIN OF THE YELLOW RIVER. JOURNAL OF ENGINEERING GEOLOGY, 26(s1): 730-739. DOI: 10.13544/j.cnki.jeg.2018265

    黄河冲积平原复杂地质环境下双排桩支护结构的深基坑监测分析

    MONITORING AND ANALYSIS OF DEEP FOUNDATION PIT WITH DOUBLE ROW PILES SUPPORTING STRUCTURE UNDER COMPLICATED GEOLOGICAL ENVIRONMENT IN ALLUVIAL PLAIN OF THE YELLOW RIVER

    • 摘要: 郑州某深基坑位于黄河冲积平原地区,该地区场地土以粉土、粉质黏土及粉砂为主,地质环境复杂。拟建建筑为住宅楼、商业及地下车库,该基坑深度约12.00m。周边分布有住宅小区,大部分为7层砖混结构,最近距离5.0m。该基坑开挖面积大,基坑深度较深,距离周边建构筑物较近。本文通过分析该深基坑位置拟建建构筑物、周边环境、场地地质水文条件等因素,在距离周边建构物较近一侧采用双排桩与锚索联合支护方案设计,并结合现场监测数据进行对比分析。分析结果表明:该深基坑开挖施工引起周边地表沉降量较小,其土体开挖对周边地表沉降的影响半径R大致符合R=2H(H为基坑深度)的原则,沉降量最大值位置在距离基坑坡顶5.0m左右,是基坑深度H的0.4~0.5倍。并对双排桩前、后两排桩变形监测结果及周边建筑物沉降监测数据进行了分析,结果均符合相关设计规范要求。本文的研究将为类似项目工程提供参考。

       

      Abstract: A deep foundation pit in Zhengzhou is located in the alluvial plain of the Yellow River. The site soil is mainly composed of silt, silty clay and silty sand, and the geological environment is complex. The proposed building is residential, commercial and underground garage. The foundation pit is about 12.00m deep. The surrounding areas are residential, most of which are seven stories of brick and concrete structures, which are closest to 5.0m. The excavation area is large, the foundation pit is deep, and is close to the surrounding structures. In this paper, by analyzing the construction, surrounding environment and geological and hydrological conditions of the deep foundation pit, the combined support scheme of two row piles and anchor cables is adopted in the near side of the surrounding construction, and the comparison analysis is made in combination with the field monitoring data. The analysis results show that the settlement of the surrounding surface caused by the excavation of the deep foundation pit is small, and the influence radius of the soil excavation on the surrounding surface settlement is roughly in line with the principle of R=2H(H as the depth of the foundation pit). The location of the maximum settlement of the settlement is about 5meters from the top of the foundation pit, and is 0.4-0.5 times the depth of the foundation pit depth of H. The deformation monitoring results of the two rows of piles and the settlement monitoring data of the surrounding buildings are analyzed. The results meet the requirements of relevant design codes. The research in this paper will provide reference for similar projects.

       

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