舟山软土地基处理的现场监测与数据分析
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摘要
软土强度较低,压缩性较高,承载力较差,软土地基要经过有效措施妥善处理,以保证后续工程的承载力及安全稳定。基于舟山某真空-堆载结合预压法处理软土地基工程,现场对孔隙水压力、土体分层沉降、深层土体水平位移、地下水位、以及地表沉降等项目进行监测,以及时对现场工作进行管理调整,并对其中一片区块的监测结果进行整理并分析,得出以下主要结论:土体水平位移随着真空抽气进行越来越大,且浅层土体较深层土体位移大;地表及各深度土层在抽真空施工开始时发生沉降,且前期沉降速度较快,施工后期趋于平稳;地表及各深度土层沉降较为协调,土体未发生不均匀沉降,总体来说真空-堆载结合预压法处理软土地基取得明显效果。
The soft soil has low strength,high compressibility and poor bearing capacity.The soft soil foundation should be properly treated by effective measures to ensure the bearing capacity and safety and stability of the subsequent projects.Based on a vacuum-stacking combined preloading method in Zhoushan to treat soft soil foundation engineering,the site will monitor the pore water pressure,soil layered settlement,deep soil horizontal displacement,groundwater level,and surface subsidence,etc.Work management adjustment,and the monitoring results of one of the blocks were sorted and analyzed,and the following main conclusions were drawn:the horizontal displacement of the soil is increasing with the progress of vacuum pumping,and the displacement of the shallow soil is shallower.Large;surface and deep soil layers are set at the beginning of vacuuming construction,and the settlement speed is relatively fast in the early stage,and tends to be stable in the later stage of construction;the settlement of the soil surface at each surface and depth is coordinated,and the soil does not have uneven settlement.It is said that vacuum-stacking combined with pre-pressing method has a significant effect on soft soil foundation treatment.
The soft soil has low strength,high compressibility and poor bearing capacity.The soft soil foundation should be properly treated by effective measures to ensure the bearing capacity and safety and stability of the subsequent projects.Based on a vacuum-stacking combined preloading method in Zhoushan to treat soft soil foundation engineering,the site will monitor the pore water pressure,soil layered settlement,deep soil horizontal displacement,groundwater level,and surface subsidence,etc.Work management adjustment,and the monitoring results of one of the blocks were sorted and analyzed,and the following main conclusions were drawn:the horizontal displacement of the soil is increasing with the progress of vacuum pumping,and the displacement of the shallow soil is shallower.Large;surface and deep soil layers are set at the beginning of vacuuming construction,and the settlement speed is relatively fast in the early stage,and tends to be stable in the later stage of construction;the settlement of the soil surface at each surface and depth is coordinated,and the soil does not have uneven settlement.It is said that vacuum-stacking combined with pre-pressing method has a significant effect on soft soil foundation treatment.
引文
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[2]谢艳.真空联合堆载预压法处理软地基施工工艺[J].公路交通科技(应用技术版),2017,13(3):94-95.
[3]姚剑.真空联合堆载预压法在软基处理中的应用[J].北方交通,2015(9):62-65.
[4]杨明生.真空预压法处理软土地基现场监测与分析[J].城市道桥与防洪,2016(8):170-174,17-18.
[5]张凤录.地下工程施工的安全监测[J].北京测绘,2004(3):22-24.
[6]刘冀.软基处理过程监测及工程应用[J].山西建筑,2007(7):133-134.
[7]胡汉兵,胡胜刚.软土路堤工后沉降监测、分析与控制[J].长江科学院院报,2010,27(4):40-43.
[8]汪传斌.广州地铁2号线大面积软土地基处理监测分析[J].城市轨道交通研究,2007(4):64-67.
[9]胡在凰,张旭东.地面沉降水准监测数据预处理流程与方法探讨[J].北京测绘,2017(S1):186-187.
[10]文渊.舟山软土土性参数随机场研究[D].浙江舟山:浙江海洋大学,2017.
[11]胡贺松.软基处理效果检测分析[J].山西建筑,2007(13):84-85.