›› 2005, Vol. 26 ›› Issue (12): 1949-1952.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Analysis of relationship between vacuity and pore-water pressure in vacuum preloading

ZHANG Gong-xin 1,2, MO Hai-hong1, DONG Zhi-liang2, ZHAO Jian-guo3   

  1. 1. Department of Civil Engineering, South China University of Technology, Guangzhou 510640, China; 2. Guangzhou Sihang Institute of Engeering Technology, Guangzhou 510230, China; 3. Guangzhou Geotechnical Investigation Institute of Building Material, Guangzhou 510403, China
  • Received:2004-12-24 Online:2005-12-10 Published:2014-01-12

PDF (PC)

1906

Abstract: Vacuity and pore-water pressure are two different conceptions, the vacuity measured by vacuum meter in the soft soil is different from the difference of pore-water pressure measured by piezometer; but there is an immanent relation between them. The theoretical formula about vacuity in vacuum tube and pore-water pressure at the observation point was obtained in this paper by using equation of gas state and equilibrium equation. When the observation point is above the groundwater surface, the vacuity is the same as the difference of pore-water pressure. When the observation point is under the groundwater surface, the vacuity is less than the difference of pore-water pressure, but they can be calculated each other by using the theoretical formula. The test results explain the relations between the vacuity and the pore-water pressure and show that the theoretical formula is correct.

Key words: vacuum meter, piezometer, vacuum preloading, vacuity, pore-water pressure

CLC Number: 

  • TU 432
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
[1] LIU Xiao-ke, LU Qun, LU Shi-wei, LIU Chun-long, GUO Shao-long,. Vacuum penetration and ultimate pull-out capacity of low skirted suction caissons [J]. , 2018, 39(6): 2089-2098.
[2] ZHANG Xiu-zhao, WU Shang-wei, ZHANG Chao, YANG Chun-he，. Dynamic pore-water pressure evolution of tailings under different consolidation conditions [J]. , 2018, 39(3): 815-822.
[3] HUANG Chao-xuan, WANG Zheng-zhong, FANG Yong-lai,. Analytical solution of vacuum preloading foundation considering air leakage and nonlinear well resistance [J]. , 2017, 38(9): 2574-2582.
[4] CHEN Po-lin, GUO Li-lun, DAVE CHANG Ta-teh. A study of piezometer real-time measurement of the riverbed scour [J]. , 2017, 38(8): 2448-2455.
[5] LIU Yong, QI Lan, LI Shao-ming, GUO Hao-yang,. 3D Finite element analysis of vacuum preloading considering inconstant well resistance and smearing effects [J]. , 2017, 38(5): 1517-1523.
[6] WU Ya-jun, NIU Kun, TANG Hai-feng, HU Zhi-gang, LU Yi-tian，. Enhanced permeability of calcium lime in construction waste slurry improvement by vacuum preloading with flocculation [J]. , 2017, 38(12): 3453-3461.
[7] BAO Shu-feng, LOU Yan, DONG Zhi-liang, NIU Fei, XIE Rong-xing, . Development of a new apparatus for measurement of groundwater level under vacuum pre-loading [J]. , 2017, 38(10): 3067-3073.
[8] MIAO Hai-bo, YIN Kun-long, WANG Gong-hui,. Dynamic mechanism of intermittent reactivation of deep-seated reservoir ancient landslide [J]. , 2016, 37(9): 2645-2653.
[9] SHEN Yang , WANG Bao-guang , TAO Ming-an , WANG Xin , DU Wen-han，. Improvement of preparing technique for hollow cylinder specimen of remolded clay and its application [J]. , 2015, 36(S1): 697-701.
[10] BAO Shu-feng ，DONG Zhi-liang ，MO Hai-hong ，WU Dong-qing,. Laboratory tests on new reinforcement technology of newly hydraulic reclamation mud with high clay content [J]. , 2015, 36(1): 61-67.
[11] TU Hong-zhen ，XU Yan-hui ，XIE Li-quan，. Mechanism and numerical analysis of effect of air injection on vacuum preloading for weak foundation improvement [J]. , 2014, 35(S2): 600-606.
[12] LE Chao , XU Chao , WU Xue-feng , JIN Ya-wei，. Experimental research on clogging characteristic of two types of PVD filters [J]. , 2014, 35(9): 2529-2534.
[13] BAO Shu-feng , MO Hai-hong , DONG Zhi-liang , CHEN Ping-shan , QIU Qing-chang,. Research on transfer properties and distribution model of negative pressure in fresh hydraulic reclamation muck foundation [J]. , 2014, 35(12): 3569-3576.
[14] ZHANG Fu-hai ，CHEN Lei ，GUO Shuai-jie ，REN Peng-xun , . Analytical solution for consolidation of sand-drained foundation with bottom vacuum preloading method [J]. , 2014, 35(10): 2787-2793.
[15] WU Yue-dong ，SHI Xiao-yan ，LIU Jian ，DIAO Hong-guo , . Analytical solution of moisture migration in crust layer of vacuum preloading zone [J]. , 2013, 34(S2): 110-114.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] WEI Long-hai, WANG Ming-nian, ZHAO Dong-ping, JI Yan-lei. Study of deformation controlling measures for large-span shallow tunnel[J]. , 2010, 31(2): 577 -581 .
[2] LIU Ming-gui，LIU Shao-bo，ZHANG Guo-hua. Application of general-purpose computation on GPUs to geotechnical engineering[J]. , 2010, 31(9): 3019 -3024 .
[3] CHEN Feng, TIAN Li-yong, LU Wei-hua. Analysis of influence of passing through shield tunnel on flood wall for Suzhou River[J]. , 2010, 31(12): 3855 -3860 .
[4] GAO Shu-sheng，QIAN Gen-bao，WANG Bin，YANG Zuo-ming，LIU Hua-xun. Numerical simulation study of mechanism for gas supplying and draining in volcanic gas reservoir in Xinjiang based on dual media model[J]. , 2011, 32(1): 276 -280 .
[5] ZENG Ling-ling, CHEN Xiao-ping. Analysis of mechanical characteristics of soft soil under different stress paths[J]. , 2009, 30(5): 1264 -1270 .
[6] SONG Yong-jun , HU Wei , WANG De-sheng , ZHOU Jun-lin. Analysis of squeezing effect of compaction piles based on modified Cam-clay model[J]. , 2011, 32(3): 811 -814 .
[7] LUO Yu-long, LUO Gu-huai. Experiments on pipe and filter structures of relief well in Dongting Lake region[J]. , 2009, 30(S2): 110 -113 .
[8] WANG Zheng-shuai , DENG Ka-zhong. Richards model of surface dynamic subsidence prediction in mining area[J]. , 2011, 32(6): 1664 -1668 .
[9] SONG Kun ，YAN E-chuan ，YANG Ju ，JI Hui-bin. Based on orthogonal design to optimize water sealed underground oil storage caverns[J]. , 2011, 32(11): 3503 -3507 .
[10] Lü Xiang-feng , PAN Yi-shan , TANG Ju-peng , XIAO Xiao-chun. Similar material simulation test and numerical analysis of impact damage law of roadway under interaction between coal and support[J]. , 2012, 33(2): 604 -610 .
Copyright © Rock and Soil Mechanics, All Rights Reserved.
Tel: 027-87198484, 87199252, 87199253, 87198752　E-mail: ytlx@whrsm.ac.cn
Powered by Beijing Magtech Co. Ltd