Centrifuge model tests of vertical bearing characteristics of steelpipe concrete composite pile(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2018年02期
- Page:
- 42-49
- Research Field:
- 桥梁与隧道工程
- Publishing date:
Info
- Title:
- Centrifuge model tests of vertical bearing characteristics of steelpipe concrete composite pile
- Author(s):
- FENG Zhongju; WANG Fuchun; ZHANG Qilang; ZHEN Dongxiao; XI Chenxin; SU Hangzhou; YIN Honghua; TIAN Jianglei; JIN Ziliang
- (1. School of Highway, Changan University, Xian 710064, Shaanxi, China; 2. Guangdong Nanyue Transportation〖JP〗Investment and Construction Co., Ltd., Guangzhou 510100, Guangdong, China; 3. Guangzhongjiang Highway Project Management Department, Jiangmen 529000, Guangdong, China; 4. Power China Northwest EngineeringCorporation Limited, Xian 710065, Shaanxi, China; 5. Guangdong Province Communications Planning &Design Institute Co., Ltd., Guangzhou 510000, Guangdong, China)
- Keywords:
- bridge engineering; steel pipe concrete composite pile; centrifuge model test; vertical bearing characteristic
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to study the steel pipe concrete composite pile in the aquatic environment, soil moduli of steel pipe depth and steel pipe soil compaction zone were selected as variables.Vertical bearing characteristics of steel pipe concrete composite pile with 8, 12, 16, 20 cm of steel pipe depth and 1.1E, 1.2E, 1.3E, 1.4E, 1.5E (where E is soil modulus in noncompaction zone) of steel pipe soil compaction zone soil modulus were studied by centrifuge model tests, and the load(P)displacement(S) curve, axial force curve and lateral friction curve of steel pipe concrete composite pile were obtained. The results show that vertical bearing characteristics of steel pipe concrete composite pile improves obviously when the steel pipe depth increases in the range of 12 cm. Vertical bearing characteristics of steel pipe concrete composite pile still improves when the steel pipe depth increases out of 12 cm, but the increase is not obvious. When the steel pipe depth increases from 8 to 20 cm, vertical bearing characteristics of steel pipe concrete composite pile increases from 3.1% to 6.7%. With the increase of the soil modulus in steel pipe soil compaction zone, the lateral friction of steel pipe concrete composite pile increases gradually. When the steel pipe soil compaction zone soil modulus increases from 1.1E to 1.5E, vertical bearing characteristics of steel pipe concrete composite pile increases from 3.1% to 5.1%. 〖JP2〗The proposed formulas for calculating of the vertical bearing characteristic of steel pipe concrete composite pile and engineering suggestion provides a reliable theoretical basis and technical support for design and construction of steel pipe concrete composite pile in aquatic environment. 1 tab, 11 figs, 20 refs.
Last Update: 2018-04-03