›› 2011, Vol. 32 ›› Issue (9): 2815-2820.

• Geotechnical Engineering • Previous Articles     Next Articles

Test study of changing rules of excess pore water pressure during dynamic consolidation at subgrade of expressway in Yellow River flood area

LI Xiao-jing1, 2，LI Shu-cai2，YAO kai3，ZHU Shao-chun4，LÜ Guo-ren2   

  1. 1. School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China; 2. Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China; 3. School of Civil and Hydraulic Engineering, Shandong University, Jinan 250061, China; 4. Binzhou Highway Survery and Design Institute, Binzhou, Shandong 256600, China
  • Received:2010-04-06 Online:2011-09-10 Published:2011-09-13

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Abstract: The subgrade of Binde Expressway mainly consist of silt and silty clay. The dissipation rule of excess pore water pressure could reflect the reinforcement effect of soil. Pore water pressure gauges were embedded in the test section. By analyzing the changing rules of excess pore water pressure, some conclusions are drawn as follows. When the test section is striked by the tamping energy of 2 000 kN•m，the best hitting number is 8-9 during the first and second passes; the best hitting number is 6-8 during the third pass. The excess pore water pressure of shallow place is higher than that of deeper place; and the excess pore water pressure of shallow place dissipated slowly. The maximum impacting depth is 8-9 m and the effective impacting depth is 6-8 m; the ratio of the effective impacting depth is 0.134-0.179. The maximum horizontal impacting distance is less than 10 m, and the effective horizontal impacting distance is about 5-7 m

Key words: dynamic consolidation, excess pore water pressure, test study, best hitting number, effective impacting depth

CLC Number: 

  • TU 472
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