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Volume 35 Issue 7
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LI Guo-wei, JIANG Wei, WU Yu-cai, WEI Shu-hong, LUO Zeng-yi, DAI Jian. Field tests on detecting cement mixing piles by static cone penetration tests in reserved hole[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(7): 1289-1296.
Citation: LI Guo-wei, JIANG Wei, WU Yu-cai, WEI Shu-hong, LUO Zeng-yi, DAI Jian. Field tests on detecting cement mixing piles by static cone penetration tests in reserved hole[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(7): 1289-1296.
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Field tests on detecting cement mixing piles by static cone penetration tests in reserved hole

  • 1. Key Laboratory of Ministry of Education for Geotechnique and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China; 3. Guangdong Zhaoyang Expressway Co., Ltd., Guangzhou 510850, China; 4. The Second Hydrological and Geological Prospecting Institute, Geological Prospecting Bureau, Wuhu 241000,China; 5. School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, China

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  • Received Date: September 20, 2012
  • Published Date: July 16, 2013
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    • Abstract
  • The method of cement mixing pile (CMP) is often used to improve soft soil foundation. CMP quality detection is important to evaluate the effect of foundation improvement. As the specified method for the current code of China government, coring has the shortages of long cycle, high cost and low efficiency. The method of quick quality detection is studied though field and laboratory tests. The results show that the method of static cone penetration tests in the reserved hole can detect the quality of CMP continuously. The tip resistance in the 7th day has good linear relationship with the unconfined compressive strength in the 28th day. The linear parameters decrease with the increase of clay particles content. The tip resistance of static cone penetration combining with the unconfined compressive strength of core samples makes the standard curve and forms the rapid detection methods for CMP. The proposed method can shorten the time, accelerate the speed, reduce the cost and improve the reliability of the test results.
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