›› 2010, Vol. 31 ›› Issue (S1): 35-40.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental research on bearing mechanism of geo-reforcement foundations

WEN Song-lin，XU Wen-qiang   

  1. Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Yangtze River Scientific Research Institute, Wuhan 430010, China
  • Received:2010-04-23 Online:2010-08-10 Published:2010-09-09

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Abstract:

Geo-reforcement foundation is a new type of pile foundation that is firstly developed and utilized in Japan. Compared with normal straight pile, this type of foundation can not only save materials and cut cost, but also can increase the bearing capacity greatly; so its application prospect is wide. Through model tests, the influences of anchor space, anchor length and anchor number on the bearing capacity of geo-reforcement foundation are analyzed; and some preliminary studies of the bearing mechanism of geo-reforcement foundation are made. The conclusions are as follows: the bearing behavior of geo-reforcement foundation is different from that of straight pile; the anchor can not only increase the side resistance of geo-reforcement foundation, but also increase the tip resistance to some extent. When the load on the pile top is the same, the displacement of geo-reforcement foundation is much less than that of normal straight pile; compared with large diameter pile with the same volumn, geo-reforcement foundation can greatly improve the foundation bearing capacity, reduce the settlement; when the anchor space is in some range, it effects the ultimate bearing capacity smally, while functions greatly on the ultimate side resistance; existing a critical anchor length, when anchor length is the critical length, its utilization effect is best; the ultimate bearing capacity of geo-reforcement foundation varies when the anchor number is different; and we can gain a satisfying bearing capacity increment by increase the anchor number appropriately.

Key words: geo-reforcement foundation, model test, bearing capacity, bearing mechanism

CLC Number: 

  • TU 473.1+1
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