振动沉管碎石桩大型振动台试验的实现
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摘要
目前有关碎石桩复合地基在动荷载作用下的研究主要是针对其排水作用,而对其密实作用的研究很少,碎石桩复合地基在动荷载作用下沉降计算理论落后于工程实践。为了在碎石桩复合地基的动力模拟试验中模拟碎石桩的密实作用,设计了大型堆叠式剪切模型箱,并采用振动沉管法在振动台模型箱中进行了碎石桩的震后沉降试验研究,结果表明其能较好地模拟碎石桩振动沉管施工工艺。
The research of stone pile composite foundation under dynamic load concentrates mainly on its drainage but not on its compactness effects.This makes that research of composite foundation settlement by dynamic load is behind its engineering practice.We designed a laminar shear model box for simulating the compactness of stone pile composite foundation,and through vibration sinking pipe stone pile technology,carried out a large-scale shaking table test to research post-earthquake settlement behaviors of stone pile composite foundation.The results show that the test is succesful in simulating construction technology of vibration sinking pipe of stone pile.
The research of stone pile composite foundation under dynamic load concentrates mainly on its drainage but not on its compactness effects.This makes that research of composite foundation settlement by dynamic load is behind its engineering practice.We designed a laminar shear model box for simulating the compactness of stone pile composite foundation,and through vibration sinking pipe stone pile technology,carried out a large-scale shaking table test to research post-earthquake settlement behaviors of stone pile composite foundation.The results show that the test is succesful in simulating construction technology of vibration sinking pipe of stone pile.
引文
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[2]凌贤长,王丽霞,王东升,等.非自由液化场地地基动力性能大型振动台模型试验研究[J].中国公路学报,2005,18(2):34-39.LING Xianchang,WANG Lixia,WANG Dongsheng,et al.Study of large-scale shaking table proportional model test of the dynamic property offoundation in unfreedom ground of liquefaction[J].China Journal of Highway and Transport,2005,18(2):34-39.
[3]刘华北,宋二祥.可液化土中地铁结构的地震响应[J].岩土力学,2005,26(3):381-391.LIU Huabei,SONG Erxiang.Earthquake induced liquefaction response of subway structure in liquefiable soil[J].Rock and Soil Mechanics,2005,26(3):381-391.
[4]Prasad S K,Towhata I,Chandradhara G P,et al.Shaking table tests in earthquake geotechnical engineering[J].Current Science,2004,87(10):1398-1404.
[5]张波,王文沛,陶连金.地铁地下结构大型振动台试验模型研究概述[J].世界地震工程,2010,01:153-157.ZHANG B o;WANG wenpei;TAO Lianjin.Review of study on model for shaking table test of a subway station structure[J].World EarthquakeEngineering,2010,1:153-157.
[6]PITILAKIS D,DIETZ M,WOOD D M,et al.Numerical simulation of dynamic soil-structure interaction in shaking table testing[J].Soil Dynam-ics and Earthquake Engineering,2008,28(6):453-467.
[7]黄春霞.碎石桩复合地基抗液化性能试验研[D].北京:北京交通大学,2005.HUANG Chunxia.Study on characteristic of stone columns composite foundation liquefaction resistance[D].Beijing:Beijing Jiaotong University,2005.
[8]TURAN A,HINCHBERGER S D,NAGGAR H E.Design and commissioning of a laminar soil container for use on small shaking tables[J].SoilDynamics and Earthquake Engineering,2009,29(2):404–414.
[9]伍小平,孙利民,胡世德,等.振动台试验用层状剪切变形土箱的研制[J].同济大学学报(自然科学版),2002,30(7):781-785.WU Xiaoping,SUN Limin,HU Shide,et al.Development of laminar shear box used in shaking table test[J].Journal of Tongji University(NaturalScience),2002,30(7):781-785.
[10]陈国兴,庄海洋,程绍革,等.土–地铁隧道动力相互作用的大型振动台试验:试验方案设计[J].地震工程与工程振动,2006,26(6):178-183.CHEN Guoxing,ZHUANG Haiyang,CHENG Shaoge,et al.A large-scale shaking table test for dynamic soil-metro tunnel interaction:testscheme[J].Earthquake Engineering and Engineering Vibration,2006,26(6):178–183.
[11]高博,张鸿儒.堆叠式剪切模型箱的改进[J]岩石力学与工程学报,2009,9(supp.2):4021-4026.GAO Bo,ZHANG Hongru.Improvent of stacked shear model box[J].Chinese Journal of Rock Mechanics and Engineering,2009,9(supp.2):4021-4026.
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