›› 2013, Vol. 34 ›› Issue (4): 1103-1108.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Analysis of small disturbing construction of protective jacket tube for cast-in-situ bored pile

HUANG Da-wei1, ZHOU Shun-hua1, LIU Chong-qing2, CHEN Tian-wen3   

  1. 1. Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongii University, Shanghai 201804, China; 2. The Third Railway Survey and Design Institute Group Corporation, Tianjin 300251, China; 3. State-owned Assets Bureau, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China
  • Received:2012-06-24 Online:2013-04-10 Published:2013-04-16

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Abstract: The small disturbing scheme that rotating and pressing the protective jacket tube to the depth which under the shield tunnel bottom about 3 meter and then boring the hole through the slurry circulating system has been used in the construction of cast-in-situ bored pile, which near to the shield tunnel of Shanghai Metro Line 9. The actual measurement shows that there is no ground loss in the scope of the protective jacket tube when boring the hole. The soil blocked the tube more and more serious with the increase of the depth of the protective jacket tube, and there is some soil squeezed out when the bottom of the tube under the axis of the tunnel, so the tunnel came-up and the vertical ellipse deformation occurred. In order to decrease the influence from the construction of the protective jacket tube, it is suggested that some of the soil should take out from the protective jacket tube when pressing it in the ground.

Key words: protective jacket tube, cast-in-situ bored pile, small disturbing, squeezing effect

CLC Number: 

  • TU 473
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