[1]冯忠居,王富春,张其浪,等.钢管混凝土复合桩竖向承载特性离心模型试验[J].长安大学学报(自然科学版),2018,38(02):42-49.
　FENG Zhong ju,WANG Fu chun,ZHANG Qi lang,et al.Centrifuge model tests of vertical bearing characteristics of steelpipe concrete composite pile[J].Journal of Chang’an University (Natural Science Edition),2018,38(02):42-49.
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钢管混凝土复合桩竖向承载特性离心模型试验()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第38卷
期数:
2018年02期
页码:
42-49
栏目:
桥梁与隧道工程
出版日期:
2018-03-31

文章信息/Info

Title:
Centrifuge model tests of vertical bearing characteristics of steelpipe concrete composite pile
作者:
冯忠居; 王富春; 张其浪; 甄东晓; 席称心; 苏航州; 尹洪桦; 田江磊; 靳子良
（1. 长安大学 公路学院，陕西 西安 710064； 2. 广东省南粤交通投资建设有限公司，广东 广州 510100；3. 广中江高速公路项目管理处，广东 江门 529000； 4. 中国电建集团西北勘测设计研究院有限公司，陕西 西安 710065； 5. 广东省交通规划设计研究院股份有限公司， 广东 广州 510000
Author(s):
FENG Zhongju;  WANG Fuchun;  ZHANG Qilang;  ZHEN Dongxiao;  XI Chenxin; SU Hangzhou; YIN Honghua; TIAN Jianglei;  JIN Ziliang
(1. School of Highway, Changan University, Xian 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, Xian 710065, Shaanxi, China; 5. Guangdong Province Communications Planning &Design Institute Co., Ltd., Guangzhou 510000, Guangdong, China)
关键词:
桥梁工程; 钢管混凝土复合桩; 离心模型试验; 竖向承载特性
Keywords:
bridge engineering;  steel pipe concrete composite pile;  centrifuge model test;  vertical bearing characteristic
文献标志码:
A
摘要:
为研究水域环境中的钢管混凝土复合桩的竖向承载特性，选取钢管埋深和钢管挤土区土体模量为变量，通过离心模型试验方法，研究钢管埋深为8、12、16、20 cm时和挤土区模量为1.1E、1.2E、1.3E、1.4E、1.5E （E为非挤土区土体模量）时钢管混凝土复合桩的竖向承载特性，得到了钢管混凝土复合桩的荷载（P）位移（S）曲线、桩身轴力曲线及桩侧摩阻力曲线。研究结果表明：钢管埋深在12 cm范围内增大时，能明显提高钢管混凝土复合桩竖向极限承载力，超过12 cm后继续增大钢管埋深，仍能提高钢管混凝土复合桩竖向极限承载力，但增幅已不明显，钢管埋深从8 cm增大到20 cm时，钢管混凝土复合桩竖向极限承载力影响度从3.1%增大到6.7%；随着钢管挤土区土体模量的增加，钢管混凝土复合桩钢管段侧摩阻力逐渐变大，钢管挤土区土体模量从1.1E增大到1.5E时，钢管混凝土复合桩竖向极限承载力影响度从3.1%增大到5.1%。提出的适用于钢管混凝土复合桩的竖向承载力计算公式及工程建议，可为水域环境中钢管混凝土复合桩的设计与施工提供可靠的理论依据与技术支持。
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 1.1E, 1.2E, 1.3E, 1.4E, 1.5E (where E is soil modulus in noncompaction 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 1.1E to 1.5E, 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.

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更新日期/Last Update: 2018-04-03