Model test analysis of the horizontal bearing capacity between five-star-shaped piles and ordinary round pile
Ren Lianwei , Zhan Junfeng , Yang Quanwei , Wang Xinquan
DOI:10.11835/j.issn.1674-4764.2016.06.004
Received May 23, 2016,Revised , Accepted , Available online July 04, 2017
Volume ,2016,Pages 24-31
- Abstract
Five-star-shaped-pile is a new type of cross section special shaped pile, which is formed by cutting five circular arcs in a circle pile. Five-star-shaped-pile is divided into two categories according to the nature of its cross section, the circumference of the maximum of five star shaped piles F1 and the perimeter area ratio of the maximum of the five-star pile F2. The experimental research on the comparison of four single piles in dry sand by sand pouring method is carried out to explore the horizontal bearing capacity of five-star-shaped piles. Similarity ratio is 1:8. These four single piles are:Maximum ratio of perimeter and area of the five star shaped pile F1,the maximum of the circumference of the five star shaped pile F2,round pile C1 with the same section of F2, round pile C2 with the same cross-sectional area of F2. The test results show that:1) the horizontal bearing capacity of F2, C1 and F1 are near, but the section area of F2 is the minimum, and it is only 0.44 times of C1; 2) the horizontal bearing capacity of F2 is 1.63 times of C2, so it is concluded that the reasonable section form can improve the horizontal bearing capacity; 3) the moment distribution of four single piles is largely consistent, and the moment reach the maximum at 0.4 m; but the section of five-star-shaped pile is small, and the bending stiffness is not enough and it is easy to break; so the whole horizontal bearing capacity is less than that of C1 but better than that of C2.