沿海下卧软弱夹层碎石回填地基15 000 kN•m 高能级强夯试验

›› 2010, Vol. 31 ›› Issue (3): 689-694.

沿海下卧软弱夹层碎石回填地基15 000 kN•m 高能级强夯试验

年廷凯^{1, 2}，李鸿江³，杨庆^{1, 2}，陈允进⁴，王玉立⁵

1. 大连理工大学海岸和近海工程国家重点实验室，大连 116023；2. 大连理工大学岩土工程研究所，大连 116023；3. 中化岩土工程有限公司，北京 102600；4. 中交水运规划设计院，北京 100007；5. 辽宁水文地质工程地质勘察院，大连 116037

收稿日期:2008-04-03 出版日期:2010-03-10 发布日期:2010-03-31
作者简介:年廷凯，男，1971年生，博士，副教授，主要从事岩土工程教学及边(滑)坡工程、软基处理与桩基工程等方面研究。
基金资助:
海岸和近海工程国家重点实验室基金(No. LP0608)；辽宁省博士启动基金(No. 20071084)资助项目。

Experiment of high energy dynamic compaction with 15 000 kN•m on a rubble fills site underlain by soft interlayer in coastal area

NIAN Ting-kai ^{1, 2}，LI Hong-jiang3，YANG Qing ^{1, 2}，CHEN Yun-jin⁴，WANG Yu-li⁵

1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116023, China; 2. Institute of Geotechnical Engineering, Dalian University of Technology, Dalian 116023, China; 3. China Zhonghua Geotechnical Engineering Co., Ltd, Beijing 102600, China; 4. China Communications Planning & Design Institute for Water Transportation, Beijing 100007, China; 5. Investigation Institute of Hydrogeology and Engineering Geology of Liaoning Province, Dalian 116037, China

Received:2008-04-03 Online:2010-03-10 Published:2010-03-31

摘要/Abstract

摘要：

针对某沿海下卧软弱夹层的碎石回填土地基，在国内首次开展了15 000 kN•m高能级强夯的现场试验。通过单点夯试验各夯点与夯坑周围地面沉降观测及强夯前后地基动力触探测试结果的对比分析，揭示了下卧软弱夹层的碎石回填地基上15 000 kN•m高能级强夯的作用机制，得出该条件下强夯的有效加固深度为11.5 m，主夯点间距宜为12.5 m，夯击数宜为18～22击的有关结论。其结果可为类似工程参考。

关键词: 高能级强夯；15 000 kN&bull, m；下卧软弱夹层；动力触探测试；有效加固深度

Abstract:

A field experiment of high energy dynamic compaction (HEDC) with 15 000 kN•m was carried out on a rubble fills site underlain by soft interlayer along coastal area for the first time in China. The ground settlements of drop points and their surrounding areas during a single drop DC are monitored, the dynamic penetration test (DPT) is carried out before and after HEDC. The test results are comprehensively analyzed, and the comparative studies are systematically done. Furthermore, the reinforcement mechanism of HEDC is discussed on a rubble fills site underlain by soft interlayer underlain, and some conclusions such as effective depth of improvement (EDI) on rubble fills site with 15 000 kN•m HEDC are drawn. It is recommended that the EDI should be 11.5 m, the intervals of 12.5 m between main drop points, and the drop numbers of 18-22 are suitable for a rubble fills foundation underlain by soft interlayer.

Key words: high energy dynamic compaction(HEDC), 15 000 kN•m, soft interlayer underlain, dynamic penetration test(DPT), effective depth of improvement (EDI)

中图分类号:

TU 472.3+1

年廷凯，李鸿江，杨庆，陈允进，王玉立. 沿海下卧软弱夹层碎石回填地基15 000 kN•m 高能级强夯试验[J]. , 2010, 31(3): 689-694.

NIAN Ting-kai，LI Hong-jiang，YANG Qing，CHEN Yun-jin，WANG Yu-li. Experiment of high energy dynamic compaction with 15 000 kN•m on a rubble fills site underlain by soft interlayer in coastal area[J]. , 2010, 31(3): 689-694.

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