碎石土地基强夯加固效果评价与工程实践

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摘要山区碎石土回填地基强夯加固效果的准确评价一直是普遍关注的难题。在分析碎石土回填地基强夯加固机理的基础上，针对山区碎石土回填地基的特点，探讨采用公式估算法及试验检测法评价其强夯加固效果的有效性、合理性，并结合实际工程进行了对应分析。分析结果表明：采用公式估算法评价山区碎石土回填地基的强夯加固效果具有局限性，而单一试验检测评价方法可靠性低、成本高，只有综合采用瑞雷波、荷载板和动力触探法才是山区碎石土回填地基经济、适用、可靠的检测评价法，而相应地基承载力及变形模量综合评价是其有效加固深度合理、适用的判定指标。

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	董倩
	况龙川
	孔凡林

关键词 ：强夯, 地基, 碎石土, 有效加固深度, 加固效果评价

Abstract：Accurate assessment of dynamic compaction reinforcement effect for crushed rock soil fill foundation in moun- tainous areas is a common concern problem. The reinforcing mechanism of dynamic compaction for crushed rock soil fill foundation is analyzed. Then, based on the characteristics of crushed rock soil fill foundation in mountain areas, the validity and rationality of formula estimating method and test method to evaluate dynamic compaction reinforcement effect are studied. At the same time, an actual project is analyzed for further discussion. The results indicate that using the formula estimating method to evaluate the dynamic compaction reinforcement effect for crushed rock soil fill foundation in mountainous areas has limitations. While a single test evaluation method has high cost and low reliability. Only to evaluate the reinforcement effect by applying the Rayleigh waves, static load tests and dynamic penetration tests comprehensively is a reliable and economy method, and the comprehensive evaluation by using the bearing capacity of foundation and deformation modulus is a reasonable and applicable judging criterion for the effective improvement depth.

Key words： dynamic compaction foundation crushed rock soil effective improvement depth reinforcement assessment

收稿日期: 2011-04-27

TU441

基金资助:国家自然科学基金项目(CSTC ， 2010BB0333)

作者简介: 董倩 (1971 – ) ，女，辽宁沈阳人，博士，副教授，主要从事地基处理及岩土工程安全度评价等方面的研究与教学工作。

引用本文:

董倩, 况龙川, 孔凡林. 碎石土地基强夯加固效果评价与工程实践[J]. 岩土工程学报, 2011, 33(zk1): 330-334. DONG Qian ， , KUANG Long-chuan , KONG Fang-lin . Reinforcement assessment and engineering practice of dynamic compaction for crushed rock soil fill foundation in mountainous areas. Chinese J. Geot. Eng., 2011, 33(zk1): 330-334.

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http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/ 或 http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/Y2011/V33/Izk1/330

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