›› 2014, Vol. 35 ›› Issue (6): 1572-1578.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental study of lateral earth pressure of rigid pile composite foundation

TONG Jian-xing，YAN Ming-li，WANG Ming-shan，SUN Xun-hai，YANG Xin-hui   

  1. Institute of Foundation Engineering, China Academy of Building Research, Beijing 100013, China
  • Received:2013-03-18 Online:2014-06-10 Published:2014-06-20

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Abstract: Through the indoor model tests, lateral earth pressures exerted by natural foundation and rigid pile composite foundation against rigid retaining walls without any displacements are measured. The distribution of lateral earth pressures of rigid pile composite foundation is obtained by the comparison with that of natural foundation. It is believed that participation of pile in rigid pile composite foundation makes magnitude and distribution of lateral earth pressure different from natural foundation. In this place, pile participation includes the deep transfer function of pile load, the influence of pile negative friction and the pile "block" effect on level additional stress of soil between piles. The influence range of lateral earth pressure of rigid pile composite foundation with surcharge is deeper than that of natural foundation. Besides, the value of lateral earth pressure of rigid pile composite foundation is smaller than that of natural foundation at the same location under the same subgrade pressure. In the test conditions of this study, the total and the additional earth pressure exerted by the rigid pile composite foundation on the rigid retaining walls are about 43.3%~80.1% and 15.9%~59.8% of the total earth pressure of the natural foundation respectively when the load level reaches the characteristic value of the foundation capacity within the range of 0.35 to1.4 m from the rigid retaining wall to the building.

Key words: rigid pile composite foundation, lateral earth pressure, overload, model test

CLC Number: 

  • TU 44
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