缺陷桩的旁孔透射波法检测分析原理

上海交通大学学报（自然版） ›› 2013, Vol. 47 ›› Issue (10): 1562-1568.

缺陷桩的旁孔透射波法检测分析原理

杜烨1,2，陈龙珠1，张敬一1，杨宇3，马晔3

（1.上海交通大学安全与防灾工程研究所，上海 200240； 2.山东科技大学资源与环境工程学院，山东青岛 266590； 3.交通运输部公路科学研究院，北京 100088）

收稿日期:2012-10-24 出版日期:2013-10-30 发布日期:2013-10-30
基金资助:
国家自然科学基金项目（51178267），交通运输部西部交通科技项目（201131822313

Analysis of Defects of Pile Shaft for Parallel Seismic Test

DU Ye1,2,CHEN Longzhu1,ZHANG Jingyi1,YANG Yu3,MA Ye3

(1.Institute of Engineering Safety and Disaster Prevention, Shanghai Jiaotong University, Shanghai 200240, China; 2.College of Resources and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China; 3.Research Institute of Highway, Ministry of Transport, Beijing 100088, China)

Received:2012-10-24 Online:2013-10-30 Published:2013-10-30

摘要/Abstract

摘要：

以均质弹性地基中具有低速缺陷段的基桩为研究对象，利用基于Snell定律的射线理论，对旁孔中首至透射P波的时深关系推导了一套简化理论计算公式，并由此提出了采用旁孔透射波法检测分析桩身缺陷的方法.对饱和地基中具有低速缺陷段的基桩，采用轴对称有限元法模拟计算了旁孔透射波法测试信号，对其按上述方法分析推算桩身低速缺陷段的位置、长度和波速以及桩长，以检验本文方法的可靠性.结果表明，本文方法具有良好的实用潜力，值得开展进一步的验证和试用工作.

关键词: 旁孔透射波法, 桩身缺陷, 简化计算模型

Abstract:

Based on Snell’s law for simplified pile-soil models, a series of formulae of time-versus-depth relations of the first-arrival of P wave in the parallel seismic test (PST) were derived and a reasonable method for determination of pile defects was proposed in this paper. An axisymmetric finite element model of a single defected pile in saturated soil was used to simulate the PST. The location, length and Pwave velocity of the defect in the pile shaft as well as the pile length were analyzed with the method presented. The results proved the application potential of the method proposed this paper, which is worth of further verification by field tests.

Key words: parallel seismic test, pile defects, simplified model

中图分类号:

杜烨1,2，陈龙珠1，张敬一1，杨宇3，马晔3. 缺陷桩的旁孔透射波法检测分析原理[J]. 上海交通大学学报（自然版）, 2013, 47(10): 1562-1568.

DU Ye1,2,CHEN Longzhu1,ZHANG Jingyi1,YANG Yu3,MA Ye3. Analysis of Defects of Pile Shaft for Parallel Seismic Test[J]. Journal of Shanghai Jiaotong University, 2013, 47(10): 1562-1568.

参考文献

［1］吴宝杰，杨桦. 联合平行地震法和磁法检测预应力混凝土长管桩的长度［J］. 工程质量，2009，27(1):2729.

WU Baojie, YANG Hua. Using parallel seismic and magnetic to detect length of prestressed concrete long tube pile ［J］. Quality Test, 2009, 27(1):2729.

［2］US Department of TransportationFederal Highway Administration. Borehole nondestructive test (NDT) methodsparallel seismic ［DB/OL］. (20130103)［20130630］http:∥www.cflhd.gov/resources/agm/engApplications/BridgeSystemSubstructure/212BoreholeNondestMethods.cfm.

［3］Huang Y H, Ni S H. Experimental study for the evaluation of stress wave approaches on a group pile foundation ［J］. NDT & E International, 2012, 47:134143.

［4］陈龙珠, 赵荣欣. 旁孔透射波法确定桩底深度计算方法评价［J］. 地下空间与工程学报, 2010, 6(1): 157161.

CHEN Longzhu, ZHAO Rongxin. On determination of pile length with parallel seismic testing for exiting structures ［J］. Chinese Journal of Underground Space and Engineering, 2010, 6(1): 157161.

［5］杜烨，陈龙珠，马晔. 旁孔透射波法确定桩底深度方法的有限元分析［J］. 防灾减灾工程学报，2012，32(6): 731736.

DU Ye, CHEN Longzhu, MA Ye. Determination of pile length using parallel seismic testing with FEM simulation ［J］. Journal of Disaster Prevention and Mitigation Engineering, 2012, 32(6): 731736.

［6］黄大治，陈龙珠. 旁孔透射波法检测既有建筑物桩基的三维有限元分析［J］. 岩土力学，2008，29(6):15691574.

HUANG Dazhi, CHEN Longzhu. 3D finite element analysis of parallel seismic tests for integrity of piles of existing structures ［J］. Rock and Soil Mechanics, 2008，29(6):15691574.

［7］Zhang J Y, Chen L Z. Selection of pile testing signals for parallel seismic test ［J］. Advanced Materials Research, 2012, 368373:20452049.