土工基础

›› 2019, Vol. 33 ›› Issue (3): 366-369.

• 工程实录 • 上一篇    下一篇

灰色系统理论在桩基竖向荷载试验中的预测应用研究

王凤梅1，陈枝东1，张领帅1，韩晓峰1，陆 钊1,2,3，陈 锐3   

  1. (1.深圳市宏业基岩土科技股份有限公司岩土工程设计所,广东深圳 518000；2.澳门大学土木与环境工程系，澳门 999078；3.哈尔滨工业大学(深圳)土木与环境工程学院,广东深圳 518000)
  • 收稿日期:2019-03-25 修回日期:2019-03-29 出版日期:2019-06-20 发布日期:2019-08-16
  • 作者简介:王凤梅（1970-），女，工程师，研究方向为地基基础工程施工管理。
  • 基金资助:

    深圳市科技研发资金(项目编号JSGG20170413163030692)

Application for the Gray System Prediction Theory in the Static Pile Lading Tests

WANG Fengmei1, CHEN Zhidong1, ZHANG Lingshuai1, HAN Xiaofeng1, LU Zhao1,2,3, CHEN Rui3   

  1. (1.Shenzhen Hongyeji Geotechnical Science and Technology Co., Ltd., Shenzhen 518000;
    2.Department of Civil and Environmental Engineering, University of Macau, Macau, 9990778;
    3.College of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518000 )
  • Received:2019-03-25 Revised:2019-03-29 Online:2019-06-20 Published:2019-08-16

摘要： 桩基极限承载力是基础设计及施工指导所需的重要参数，但是实际工程中将桩基加载至极限破坏状态极其困难。灰色系统理论作为一种新型预测方法，不仅可实现对桩基加载破坏时极限承载力的预测，且具有所需数据量少、预测精度高等特点。以桩基的竖向荷载静载试验中各级荷载作用下的荷载和沉降为研究对象，分析建立了基于灰色系统理论的预测模型，并用于预测桩基试验的荷载沉降规律。结果表明：灰色系统理论预测的沉降曲线与不同桩长的桩基础加载试验的实测沉降曲线间的误差较小，尽管灰色系统理论在不同桩长的预测规律误差方面有所差异，但灰色系统理论在桩基预测的整体预测效果上较为理想且具有较好的适用性。

关键词: 灰色系统理论, 桩基荷载试验, 预测, 一阶线性微分方程, 荷载沉降曲线

Abstract: The ultimate axial capacity of pile is an important parameter for the design and construction of pile supported foundations, however, it is difficult to statically load the pile to failure. As a new prediction method, the gray system theory can accurately predict the ultimate axial load at pile failure and needs fewer data points. This paper presents a gray system prediction model based on the deflections of pile head under different loadings in the pile axial static load tests and its application in the ultimate load prediction for other pile axial load tests. The following conclusions can be made: Although some errors might exist, the predicted pile head deflection using the gray system model are generally consistent with the static load test results on piles with various lengths. It is also concluded that the gray system theory has a good result in predicting the ultimate pile capacity of piles.

Key words: Gray System Theory, Static Pile Load Tests, Predictions, First Oder Linear Differential Equations, Load-Settlement Curves