|
|
|
| Influence of Roughness on Bearing Characteristic of Super- long Rock - socketed Pile |
| CHANG Yu，DING Hong-yuan，CHEN Bin |
| Wuhan Surveying-Geotechnical Research Institute Co. Ltd. Of MCC，Wuhan，Hubei 430080，China |
|
|
|
|
Abstract Research purposes: Based on the pile foundations of a bridge in Wuhan City，the finite element method is used to study pile settlement，pile side friction distribution and axial force distribution with different pile side roughness. Then combined with the laboratory model test results，explored the roughness on the bearing characteristics of super-long rock-socketed piles.
Research conclusions: The results shows that the pile side friction is easier to play as the surface of pile is rougher, for this reason the pile side friction get bigger and the pile settlement become smaller. In the same time，the rate of transfer load on pile top to the surrounding rock and soil is faster，and the depth of transfer the same level of vertical load become smaller. However, the roughness does not much affect the load proportion of pile tip. The conclusions can provide a reference for design and construction of super-long rock-socketed pile.
|
|
Received: 31 May 2013
|
|
|
|
|
|
[1]刘利民.增加孔壁粗糙度提高钻孔灌注桩承载力的原理及施工措施[J].建筑技术，2002 ( 3 ) :188-189.
Liu Limin. Enhancing the Bearing Capacity of Bored Pile by Improving Roughness of the Hole[J]. Architecture Technology , 2002 ( 3 ) :188-189.
[2]王雁然，潘家军.嵌岩桩竖向荷载 - 沉降特性的有限元分 析[J].武汉大学学报(工学版),2006(5):46-52.
Wang Yanran, Pan Jiajun. Finite Element Analysis of Vertical Load-settement Characters of Rock- socketed Piles[J].Engineering Journal of Wuhan University, 2006(5):46-52.
[3]Pens P J N, Rowe R K, Turner R M. An experimental investigation into side shear for socketed piles in sandstone[C]// Proceedings of the International Conference on Structural Foundations on Rock, Sydney. 1980(1):291-302.
[4]Horvath R G，Kenny T C, Kozichi P. Method of improving the performance of drilled piers in weak rock[J].Canadian Geotechnical Journal, 1983，20 (4):758-772.
[5]张建新，吴东云，杨宝珠.不同桩侧粗糙度下桩侧阻力分析[J].辽宁工程技术大学学报(自然科学版)，2008 (1):57-59.
Zhang Jianxin, Wu Dongyun, Yang Baozhu. Analysis of Effects of Hole Side Roughness on Pile Side Resistance[J].Journal of Liaoning Technical University( Natural Science)，2008 (1):57-59.
[6]龚成中，龚维明，何春林，等.孔壁粗糙度对深嵌岩桩承载特性的影响[J].中国公路学报，2011(2): 56-61.
Gong Chengzhong, Gong Weiming, He Chunlin, etc. Influence of Hole Side Roughness on Bearing Characteristic of Deep Rock-socketed Pile[J].China Journal of Highway and Transport, 2011( 2 ) : 56-61.
[7]孙树礼.大直径超长钻孔灌注桩承载特性试验研究[J]. 铁道工程学报，2011(10 ) : 66-71.
Sun Shuli. Research on Bearing Characteristics of Large-diameter and Overlength Bored Pile[J]. Journal of Railway Engineering Society , 2011(10 ) : 66- 71.
|
|
|
|
2013, Vol. 30 
