强夯地基加固效果检测的分析
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摘要
深圳某加工厂项目场区原地形高差大,需平整场地,回填砾质粘性土采用强夯处理,夯击能为4000kN·m,并用重型动力触探检测强夯地基处理效果。重型动探检测结果显示夯点下地基土存在松弛、硬壳、衰减层等分层现象。夯点下深度与地基土动探击数为三次方函数或幂函数关系,体现了振动波振幅和加速度峰值随着深度衰减的规律,佐证了强夯地基土是通过振动波(主要是纵波)得到加固的观点。夯点间地基土则未显示显著的分层,说明强夯地基土具有复合地基的特征。
The original terrain elevation difference is very large in a factory of Shenzhen. In order to flat ground, we use dynamic compaction (4000 kN·m) to consolidation of foundation soil. Revealed by dynamic penetration test (DPT), there is the level of foundation soil stratification. Depth and DPT blow count is a function of cubic or power. It's the evidence of the dynamic consolidation of foundation soil by vibration waves (mainly P-wave) have been reinforced. There is no significant hierarchical feature, between the tamper-point foundation soils.
The original terrain elevation difference is very large in a factory of Shenzhen. In order to flat ground, we use dynamic compaction (4000 kN·m) to consolidation of foundation soil. Revealed by dynamic penetration test (DPT), there is the level of foundation soil stratification. Depth and DPT blow count is a function of cubic or power. It's the evidence of the dynamic consolidation of foundation soil by vibration waves (mainly P-wave) have been reinforced. There is no significant hierarchical feature, between the tamper-point foundation soils.
引文
[1] GB 50187-93 工业企业总平面设计规范[S].1993．
[2] 潘千里.国外一种经济而简便的地基加固方法--强夯法[J].港工译丛,1979(1) .
[3] 钱家欢,钱学德,赵炳维,等.动力固结的理论与实践[J].岩土工程学报,1986,8(6) :1-17．
[4] JGJ 79-2002 建筑地基处理技术规范[S].2002．
[5] DBJ 15-38-2005 建筑地基基础技术规范[S].2005．
[6] 林宗元主编.岩土工程治理手册[M].北京:中国建筑工业出版社,2005:53-64．
[7] 龚主华,等,岩土工程施工方法[M].沈阳:辽宁科学技术出版社,1990:80-119．
[8] GB 50021-2001 岩土工程勘察规范[S].2001．
[9] DBJ 15-60-2008 建筑地基基础检测规范[S].2008．
[10] 吴铭炳,王钟琦.强夯机理的数值分析[J].工程勘察,1989(3) :1-5．
[11] 叶根喜,姜福兴,郭延华,等.煤矿深部采场爆破地震波传播规律的微震原位试验研究[J].岩石力学与工程学报,2008,27(5) :1053-1058．
[12] 魏斌,戎建国.强夯加固机理及设计参数的研究[J].中国水运,2007,5(8) :81-83．
[2] 潘千里.国外一种经济而简便的地基加固方法--强夯法[J].港工译丛,1979(1) .
[3] 钱家欢,钱学德,赵炳维,等.动力固结的理论与实践[J].岩土工程学报,1986,8(6) :1-17．
[4] JGJ 79-2002 建筑地基处理技术规范[S].2002．
[5] DBJ 15-38-2005 建筑地基基础技术规范[S].2005．
[6] 林宗元主编.岩土工程治理手册[M].北京:中国建筑工业出版社,2005:53-64．
[7] 龚主华,等,岩土工程施工方法[M].沈阳:辽宁科学技术出版社,1990:80-119．
[8] GB 50021-2001 岩土工程勘察规范[S].2001．
[9] DBJ 15-60-2008 建筑地基基础检测规范[S].2008．
[10] 吴铭炳,王钟琦.强夯机理的数值分析[J].工程勘察,1989(3) :1-5．
[11] 叶根喜,姜福兴,郭延华,等.煤矿深部采场爆破地震波传播规律的微震原位试验研究[J].岩石力学与工程学报,2008,27(5) :1053-1058．
[12] 魏斌,戎建国.强夯加固机理及设计参数的研究[J].中国水运,2007,5(8) :81-83．
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