不同真空预压工艺处理软土地基效果分析
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摘要
真空预压法被广泛应用于加固软土地基,为提高其加固效果或节约成本,众多新工艺也得到开发研究。针对真空预压新工艺案例较少,成果差异也较大的问题,采用现场典型试验的方法,对传统真空预压、直排式真空预压和水平排水带真空预压的工艺进行研究,分析比较真空度、沉降量、水位降以及加固后的土体物理力学指标改良情况等指标,总结了不同工法的地基处理效果差异。研究成果为各种工法的进一步研究提供了依据,丰富各工法的适用性,也可供其它类似工程借鉴。
Vacuum preloading or cut the cost, many advanced technologies have been developed and studied. For the problem about few cases of new vacuum preloading process and great difference of results, we studied the technologies of traditional vacuum preloading, straight-line vacuum preloading and horizontal vacuum drainage preloading through in-site typical test,analyzed and compared the vacuum degree, settlement, water level decrease and the improved physical and mechanical indexes of soft soil after treatment, and summarized the difference of foundation treatment effect of different vacuum preloading methods. The test and research results provide basis for further study of various vacuum preloading methods, enrich the applicability of different methods, and can be referred by similar projects.
Vacuum preloading or cut the cost, many advanced technologies have been developed and studied. For the problem about few cases of new vacuum preloading process and great difference of results, we studied the technologies of traditional vacuum preloading, straight-line vacuum preloading and horizontal vacuum drainage preloading through in-site typical test,analyzed and compared the vacuum degree, settlement, water level decrease and the improved physical and mechanical indexes of soft soil after treatment, and summarized the difference of foundation treatment effect of different vacuum preloading methods. The test and research results provide basis for further study of various vacuum preloading methods, enrich the applicability of different methods, and can be referred by similar projects.
引文
[1]龚晓南.地基处理手册[M].3版.北京:中国建筑工业出版社,2008.GONG Xiao-nan.Foundation treatment manual[M].3rd ed.Beijing:China Architecture&Building Press,2008.
[2]高志义.真空预压的机理分析[J].岩土工程学报,1989,11(4):45-55.GAO Zhi-yi.Analysis on mechanics of vacuum preloading method[J].Chinese Journal of Geotechnical Engineering,1989,11(4):45-55.
[3]赵维炳.排水固结加固软基技术指南[M].北京:人民交通出版社,2005.ZHAO Wei-bing.Technical guide for improving soft soils with drainage consolidation method[M].Beijing:China Communications Press,2005.
[4]夏玉斌,陈允进.直排式真空预压法加固软土地基的试验与研究[J].工程地质学报,2010(3):376-384.XIA Yu-bin,CHEN Yun-jin.Experimental study and research on straight-line vacuum preloading method to reinforce soft soil[J].Journal of Engineering Geology,2010(3):376-384.
[5]JTS 147-2—2009,真空预压加固软土地基技术规程[S].JTS 147-2—2009,Technical specification for vacuum preloading technique to improve soft soils[S].
[6]中交第三航务工程勘察设计院有限公司.越南河静钢厂地基改良前导试验工程真空预压区竣工报告[R].2012.CCCC Third Harbor Consultants Co.,Ltd.Completion report of vacuum preloading for ground improvement trial project of Formosa Ha Tinh Steel Corporation(Vietnam)[R].2012.
[2]高志义.真空预压的机理分析[J].岩土工程学报,1989,11(4):45-55.GAO Zhi-yi.Analysis on mechanics of vacuum preloading method[J].Chinese Journal of Geotechnical Engineering,1989,11(4):45-55.
[3]赵维炳.排水固结加固软基技术指南[M].北京:人民交通出版社,2005.ZHAO Wei-bing.Technical guide for improving soft soils with drainage consolidation method[M].Beijing:China Communications Press,2005.
[4]夏玉斌,陈允进.直排式真空预压法加固软土地基的试验与研究[J].工程地质学报,2010(3):376-384.XIA Yu-bin,CHEN Yun-jin.Experimental study and research on straight-line vacuum preloading method to reinforce soft soil[J].Journal of Engineering Geology,2010(3):376-384.
[5]JTS 147-2—2009,真空预压加固软土地基技术规程[S].JTS 147-2—2009,Technical specification for vacuum preloading technique to improve soft soils[S].
[6]中交第三航务工程勘察设计院有限公司.越南河静钢厂地基改良前导试验工程真空预压区竣工报告[R].2012.CCCC Third Harbor Consultants Co.,Ltd.Completion report of vacuum preloading for ground improvement trial project of Formosa Ha Tinh Steel Corporation(Vietnam)[R].2012.