巴拿马Amador邮轮码头深厚软黏土地基沉降预测方法对比  

Comparison of settlement prediction methods of deep soft clay foundation of Amador cruise terminal in Panama

作　　者：王超 罗航 邱敏 胡睿杰 骆钊 WANG Chao;LUO Hang;QIU Min;HU Rui-jie;LUO Zhao(The Fifth Engineering Branch of CCCC Second Harbor Engineering Co.,Ltd.,Wuhan 430040,China;Key Laboratory of Large-span Bridge Construction Technology,Wuhan 430040,China;Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure Wuhan 430040,China;CCCC Highway Bridge National Engineering Research Centre Co.,Ltd.,Beijing 100011,China;CCCC Second Harbor Engineering Co.,Ltd.,National Enterprise Technology Center,Wuhan 430040,China)

机构地区：[1]中交二航局第五工程分公司,湖北武汉430040 [2]长大桥梁建设施工技术交通行业重点实验室,湖北武汉430040 [3]交通运输行业交通基础设施智能制造技术研发中心,湖北武汉430040 [4]公路长大桥建设国家工程研究中心,北京100011 [5]中交二航局技术中心,湖北武汉430040

出　　处：《水运工程》2020年第11期170-175,185,共7页Port & Waterway Engineering

摘　　要：巴拿马Amador邮轮码头项目场地存在深厚软黏土地层。为了评估地基剩余沉降,基于恒载期间观测数据,采用双曲线法、三点法、Asaoka法预测沉降。针对三点法中3个等间距沉降点难以确定的问题,以最小曲率半径入手,合理定义了3个沉降点。选取5个典型的时间-沉降曲线,对观测点的地基沉降开展了对比分析。得出如下结论:1)双曲线法预测的沉降通常会偏大,随着沉降观测时间的增加,沉降预测的准确度会随之提高。2)Asaoka法预测沉降值与稳定值相近,但小于最终稳定值,显然会使地基沉降偏不安全。3)三点法沉降预测结果大于Asaoka法且低于双曲线法,更接近于稳定值。4)3种沉降预测方法均具有简单、实用的特点,预测的剩余沉降均小于150 mm,满足项目沉降设计要求。There is deep soft clay stratum in the project site of Amador cruise terminal project in Panama.In order to evaluate the residual settlement of the foundation,based on the observation data during the dead load period,the hyperbolic method,the three-point method and the Asaoka method are used to predict the settlement.Aiming at the problem that it is difficult to determine the three equally spaced settlement points in the three-point method,starting with the minimum radius of curvature,three settlement points are reasonably defined.Five typical time settlement curves are selected,and a comparative analysis is carried out on the settlement of the observation points.The following conclusions are drawn:1)Predicted settlements from hyperbolic method is usually larger,with the increase of settlement observation time,the accuracy of the measurement will be improved.2)Predicted settlements from the Asaoka method is similar to the stable value,but they are smaller than the final stable value,which obviously makes the foundation settlement unsafe.3)Predicted settlements from the three-points method are larger than the predicted settlements from Asaoka method and lower than the hyperbolic method,which is closer to the stable value.4)The three settlement prediction methods are simple and practical,and the predicted residual settlement is less than 150 mm,which meets the settlement design requirements of the project.

关 键 词：码头 沉降 三点法 ASAOKA法 双曲线法 

分 类 号：TU433[建筑科学—岩土工程] U656[建筑科学—土工工程]