# [1]张琦,刘军,戴国亮,等.大直径嵌岩桩桩端极限承载力计算方法[J].东南大学学报(自然科学版),2018,48(1):118-124.[doi:10.3969/j.issn.1001-0505.2018.01.018] 　Zhang Qi,Liu Jun,Dai Guoliang,et al.Calculation methods for ultimate end bearing capacity of large diameter rock-socketed piles[J].Journal of Southeast University (Natural Science Edition),2018,48(1):118-124.[doi:10.3969/j.issn.1001-0505.2018.01.018] 点击复制 大直径嵌岩桩桩端极限承载力计算方法() 分享到： var jiathis_config = { data_track_clickback: true };

48

2018年第1期

118-124

2018-01-20

## 文章信息/Info

Title:
Calculation methods for ultimate end bearing capacity of large diameter rock-socketed piles

Author(s):
Key of Laboratory for Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China
School of Civil Engineering, Southeast University, Nanjing 210096, China

Keywords:

TU47
DOI:
10.3969/j.issn.1001-0505.2018.01.018

Abstract:
To obtain the ultimate bearing capacity of the large diameter rock-socketed piles, three ultimate states of the rock mass on the pile tip are considered, which are the continuous slip failure on the pile tip, the shear failure surrounding the pile tip and the fracture of the micro-cracks surrounding the pile tip. Based on two-dimensional, three-dimensional Hoek-Brown failure criteria and the micro-crack Ⅰ-Ⅱ composite criterion, four calculation methods for the ultimate bearing capacity of the pile end on the large diameter rock-socketed piles are proposed. Using the existed measured data, the proposed calculation methods are analyzed and verified. The results of the four proposed methods are close to the measured values, especially the result of the calculation method based on the Ⅰ-Ⅱ composite criterion considering the fracture of the micro-cracks surrounding the pile tip. The size effect on the large diameter rock-socketed piles is further studied. The result show that the ultimate bearing load of the pile end is closely related to the rock-socketed depth and pile diameter, and the results show that the ultimate bearing load of the rock-socketed pile increases with the increasing of the rock-socketed depth and decreases with the increasing of the pile diameter. The results obtained by the calculation method based on the Ⅰ-Ⅱ composite criterion considering the fracture of the micro-cracks surrounding the pile tip are consistent with the observed results from the field among the four calculation methods.

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