基于十字板剪切试验的软基处理效果评价研究
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摘要
近年来,地基处理技术发展很快,新技术新工艺不断地涌现。在沿海等软土地区,天然地基土的力学性质较差,往往需要进行地基处理。为评价软土地基的处理效果,本文以广州市南沙区某基础设施设计软基处理工程A区为例,利用十字板剪切试验和室内土工试验对软土地基处理效果进行分析和评价。对比地基处理前后十字板剪切试验和室内土工试验的数据,发现该软土经过真空预压处理后,土体的抗剪强度显著提高,达到设计要求,说明地基处理效果较好。对于软土地区优先采用十字板剪切试验检测方法,具有一定的工程实践意义。
In recent years, the foundation treatment technology has developed rapidly, new technologies and new processes have emerged continuously. In soft soil areas such as coastal areas, since the mechanical properties of natural foundation soils are poor, foundation treatment is often required.In order to evaluate the treatment effect of soft soil foundation, the paper takes the a soft foundation treatment in an infrastructure designproject in Nansha District of Guangzhou as an example, and analyzes and evaluates the treatment effect of soft soil foundation by using vane shear test and indoor soil test. Comparing the data of the vane shear test and indoor soil test before and after the foundation treatment, it is found that the shear strength of the soft soil is significantly improved after vacuum pre-pressing treatment, and the design requirements are metindicating that the foundation treatment effect is good. For the soft soil area, the vane shear test method is preferred, which has certain engineering practical significance.
In recent years, the foundation treatment technology has developed rapidly, new technologies and new processes have emerged continuously. In soft soil areas such as coastal areas, since the mechanical properties of natural foundation soils are poor, foundation treatment is often required.In order to evaluate the treatment effect of soft soil foundation, the paper takes the a soft foundation treatment in an infrastructure designproject in Nansha District of Guangzhou as an example, and analyzes and evaluates the treatment effect of soft soil foundation by using vane shear test and indoor soil test. Comparing the data of the vane shear test and indoor soil test before and after the foundation treatment, it is found that the shear strength of the soft soil is significantly improved after vacuum pre-pressing treatment, and the design requirements are metindicating that the foundation treatment effect is good. For the soft soil area, the vane shear test method is preferred, which has certain engineering practical significance.
引文
[1]GB50007-2011建筑地基基础设计规范[S].北京:中国建筑工业出版社,2012.
[2]GB50021-2001(2009版)岩土工程勘察规范[S].北京:中国建筑工业出版社,2009.
[3]《工程地质手册》编写委员会.工程地质手册(第五版)[M].北京:中国建筑工业出版社,2018.
[4]高大钊.土力学与基础工程[M].北京:中国建筑工业出版社,1998.
[5]刘汉龙,赵明华.地基处理研究进展[J].土木工程学报,2016,49(01):96-115.
[6]张宏明,高宗旗,孙成科.十字板剪切试验推演黄骅港软土抗剪强度指标[J].港工技术,2018,55(S1):162-164.
[7]赵汉亮.软土地基真空预压处理效果评估方法应用研究[J].广东土木与建筑,2018,25(08):41-43.
[8]孙敬.用数理统计方法分析十字板剪切试验成果数据[J].中国水运(下半月),2012,12(05):267-268.
[9]闫澍旺,封晓伟,侯晋芳,等.用十字板强度推算软黏土抗剪强度指标的方法及应用[J].岩土工程学报,2009,31(12):1805-1810.
[10]韩映忠,林树周,张占峰,李张锋.深厚软土条件下被动区加固在深基坑工程的应用与数值分析[J].广州建筑,2015,43(06):36-40.
[11]朱烈.软土地区超大吨位桩基静载试验支墩地基处理方法研究[J].广州建筑,2016,44(04):27-30.
[2]GB50021-2001(2009版)岩土工程勘察规范[S].北京:中国建筑工业出版社,2009.
[3]《工程地质手册》编写委员会.工程地质手册(第五版)[M].北京:中国建筑工业出版社,2018.
[4]高大钊.土力学与基础工程[M].北京:中国建筑工业出版社,1998.
[5]刘汉龙,赵明华.地基处理研究进展[J].土木工程学报,2016,49(01):96-115.
[6]张宏明,高宗旗,孙成科.十字板剪切试验推演黄骅港软土抗剪强度指标[J].港工技术,2018,55(S1):162-164.
[7]赵汉亮.软土地基真空预压处理效果评估方法应用研究[J].广东土木与建筑,2018,25(08):41-43.
[8]孙敬.用数理统计方法分析十字板剪切试验成果数据[J].中国水运(下半月),2012,12(05):267-268.
[9]闫澍旺,封晓伟,侯晋芳,等.用十字板强度推算软黏土抗剪强度指标的方法及应用[J].岩土工程学报,2009,31(12):1805-1810.
[10]韩映忠,林树周,张占峰,李张锋.深厚软土条件下被动区加固在深基坑工程的应用与数值分析[J].广州建筑,2015,43(06):36-40.
[11]朱烈.软土地区超大吨位桩基静载试验支墩地基处理方法研究[J].广州建筑,2016,44(04):27-30.