基于弯曲元技术的无黏性土剪切波速与相对密度联合测试方法

doi:10.13722/j.cnki.jrme.2015.1382

Abstract
Figure/Table
References (8)
Related Citation (15)

Download: PDF (1158 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Shear-wave velocity and relative density are important parameters to assess the properties of cohesionless soil. To measure the shear wave velocity of gravelly soil，a combined test system of shear-wave velocity and relative density was developed. The system was established on a specific steel bearing cylinder combining bending-element technique，and then applied on soil samples with different relative densities prepared by a vertically vibrating table. The first-arrival time of shear-wave in bending-element technique is corrected. The system is designed to test shear-wave velocity of gravel with maximum particle diameter less than 50 mm，and then to build relationships of shear-wave velocity with respect to relative density of cohessionless soil. Four types of samples，i.e.，standard sand samples，granite samples，60% gravel content samples constituting of standard sand and granite，and samples prepared according to the mean grading of gravelly soil that liquefied in Wenchuan earthquake，are tested and the results indicate that shear-wave velocity of gravelly soil is large than sand under same relative density. Shear-wave velocity of gravelly soil increases exponentially with respect to increasing relative density. Comparing to GDS apparatus，the testing shear-wave velocity of gravelly soil are similar yet the design system is more applicable and more convenient.

Key words： soil mechanics bender elements shear wave velocity relative density gravel soils

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	WANG Yunlong
	CAO Zhenzhong
	YUAN Xiaoming
	CHEN Longwei

Cite this article:

WANG Yunlong,CAO Zhenzhong,YUAN Xiaoming, et al. A testing method for shear-wave velocity and relative density of cohesionless soil using bending-element technique[J]. , 2016, 35(S1): 3418-3423.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.1382 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS1/3418

[1]	曹振中，袁晓铭. 砂砾土液化的剪切波速判别方法[J]. 岩石力学与工程学报，2010，29(5)：943-951.(CAO Zhenzhong，YUANXiaoming.Shear wave velocity- based approach for evaluating gravel soils liquefaction[J].Chinese Journal of Rock Mechanics and Engineering，2010，29(5)：943-951.(in Chinese))
[2]	王炳辉，刘建达，陈国兴. 结构性和相对密度对南京细砂抗液化强度的影响[J].防灾减灾工程学报，2007，27(4)：383-388.(WANG Binghui，LIU Jianda，CHEN Guoxing.Effects of relative density and structural properties on liquefaction resistance of Nanjing fine sand[J].Journal of Disaster Prevention and Mitigation Engineering，2007，27(4)：383-388.(in Chinese))
[3]	SEED H B，IDRISS I M. Simplified procedure for evaluating soil liquefaction potential[J].Journal of Soil Mechanicsand Foundation Division，1971，97(SM9)：1 249-1 273.
[4]	陈云敏，周燕国，黄博. 利用弯曲元测试砂土剪切模量的国际平行试验[J]. 岩土工程学报，2006，28(7)：874-880.(CHEN Yunmin，ZHOU Yanguo，HUANG Bo.International parallel test on the measurement of shear modulus of sand using bender elements[J].Chinese Journal of Geotechnical Engineering，2006，28(7)：874-880.(in Chinese))
[5]	DYVIK R，MADSHUS C. Lab measurements of Gmaxusing bender elements[C]//Advances in the Art of Testing Soils under Cyclic Conditions. New York：ASCE，1985：186-196.
[6]	GOHL W B，FINN W D L. Use of piezoceramic bender elements in soil dynamic testing[C]//Recent Advances in Instrumentation，Data Acquisition and Testing in Soil Dynamics. New York：ASCE，1991：118-133.
[7]	JOVICIC V，COOP M R，SIMIC M.Objective criteria for determiningGmaxfrom bender element tests[J].Geotechnique，1996，46(2)：357-362.
[8]	姬美秀，陈云敏，黄博. 弯曲元试验高精度测试土样剪切波速方法[J]. 岩土工程学报，2003，25(6)：732-736.(JI Meixiu，CHEN Yunmin，HUANG Bo.Method for precisely determining shear wave velocity of soil from bender element tests[J].Chinese Journal of Geotechnical Engineering，2003，25(6)：732-736.(in Chinese))