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School of Civil Engineering, Lanzhou jiaotong University, lanzhou 730070,CHINA; E-mail: 1 zhangyong_L@126.com; 2 Litian_bao@163.com Keywords: group pile foundation; Pushover analysis; soil resistance; nonlinear Abstract: Soil is a strong non-linear media and show obvious nonlinear under the small displacement of the foundation.
It is specified by pile foundation design code of port engineering that the m-method applies only to the situation that the maximum value of horizontal displacement of soil in the ground is not more than 10 mm.
In practical engineering applications, the p-y curve can be measured and also can be chosen from the standard p-y curves according to the characteristics of foundation soil.
Chinese Journal of Geotechnical Engineering, 2009, Vol.31(9):1398-1401
，Imbsen，R．(1991)．Modeling Bridge Foundations for Seismic Design and Retrofitting, Transportation Research Record No. 1290, Third Bridge Engineering Conference．Denver,Colorado：l 13-1 26.

China Civil Engineering Journal, 2006, 39(6):106-110
Chinese Journal of Geotechnical Engineering, 2004, 26(1):75-78
A large-scale shaking table test for dynamic soil-metro tunnel interaction: test scheme [J] Earthquake Engineering and Engineering Vibration, 2006, 26(6):178-183
Earthquake Engineering and Structural Dynamics, 2000, 29(6): 813-821
Journal of Engineering Mechanics Division ASCE 1969 95(4) 859–877

Study on the Construction Time of Secondary Lining in Loess Tunnel Jianning Cuia, Yongtao Gaob , Jinqiang Wangc Jian Lid, and Fugen Denge School of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing, 100083, China acjn_2008@126.com, bgyt1962@163.com, cwangjq@ustb.edu.cn, dljbk911@163.com, e514128897@qq.com Keywords: Loess Tunnel, Secondary Lining, Construction Time, Regression Analysis Abstract.
Vol. 29 (2010), P. 1690 (In Chinese) [3] Z.C.Liu, W.J.Li, Y.Q.Zhu and M.L.Sun: Chinese Journal of Rock Mechanics and Engineering.
Vol. 27 (2008), P. 580 (In Chinese) [4] T.J.Liu, H.H.Zhu and W.Q.Ding: Chinese Journal of Rock Mechanics and Engineering.
Vol. 23 (2004), P. 75 (In Chinese) [5] F.Xie, S.P.Jiang and J.J.Li: Chinese Journal of Underground Space and Engineering.
Vol. 2 (2006), P. 805 (In Chinese) [6] J.M.Yang, Y Yu, Z.S and H.X.Zhao: Journal of Railway Engineering Society. (2009), P. 76 (in Chinese) [7] J.Q.Fang, C.C.Xia, Y.Y.Bian, Y.W.Peng and K.He: Chinese Journal of Underground Space and Engineering.

Study on Investigation and Analysis of ExistingTunnel Diseases Dongping Zhao1,a, Xinrongtan2,b, Lingli Jia3,c 1Research Division of Science and Technology Engineering, China Railway Eryuan Engineering Group Co.
LTD, Chengdu 610031, China 2School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China 3School of Architecture, Southwest Jiaotong University, Chengdu Sichuan 610031, China adpingzhao@163.com, bxy.tan@163.com, cjialingli@163.com Keywords:Investigation, Analysis, Existing Railway, Tunnel Disease Abstract：Due to the impactofgeological condition, climate condition, design, construction and other factors, the existing railway tunnelappears some diseases more and more, and even some diseases have serious influence to the normal use of tunnels and traffic safety.
Collection of Key Points for Maintenance Management of Tunnel Engineering[M].
Railway Engineering, 2013, No.4, p. 76-79
Journal of railway science and engineering, 2010, Vol.7, No.3, p.91-93.

Experiment Study on One Dimensional Vertical Soil Pole Seeper Infiltration of Unsaturated Clayey Sand Qiangqiang MiaoP1,aP , Zhenghan ChenP2,bP, Qingqing Zhu P1,cP， Zhihua YaoP1,dP,Junhao ZhangP1,eP P1P Department of Military Civil Engineering,L.E.U,Chongqing 401331，China; P2P.College of Chemical Engineering,Northwest Minority University,Lanzhou 730000 PaPmiaoqiang2008@qq.com, PbPchenzhenghan47@163.com, PcPzqq530@163.com PdPyaozhihua1983@qq.com,P eP15922512992@163.com Keywords: Infiltration Ratio, Water Content, Moisture Movement, Wetness Front Abstract:Measuring system of soil moisture and water bedload LGD-Ⅲ was used in those tests .
The moisture infiltrate through the soil is a general problem that has a great deal of studies in many regions that have relation with soils, such as geotechnical engineering, hydraulic engineering, highway engineering ,agriculture engineering etc.
Acknowledgement The research are supported by graduate student innovational fund item Logistical Engineering University 2008, Natural Science Foundation (10902091), Natural Science Foundation of Chongqing (2009bb8114).

The operating resistance caused by digging soil is the major power cost of the machinery system, and how can reduce the operating resistance is a key problem concerned by engineers.
Based on the different demands and purposes of engineering, there are many constitutive model of soil have been presented, such as Lade-Duncan model, Cambridge model, Max-Well model, and so on.
Journal of Jilin University ( Engineering and Technology Edition), Vol 33, No. 3(2003) p. 9 (In Chinese) [5] Shufa Chen, Yaoming Li, Xingzhao Sun..
Journal of Mechanical Engineering.
China Civil Engineering Journal, Vol 35, No 6(2002),p.79 [9] Jingxia Jia, Deqiu Yang, Dongxing Zhang.

Metro Construction Safety Risk Assessment of Xi'an Based on CIM Model Bixue Zhang1, a, Fenghai Ma1,b 1College of Civil and Architectural Engineering, Dalian University, Dalian, 116622, China ashawcheung@126.com, bxkb@vip.163.com Keywords: Subway construction, Risk assessment, CIM model, Fuzzy AHP, Risk level Abstract.
The risk controlling in preparation stage may guide the engineering practice in a better way.
It is an unavoidable challenge for urban rail transit engineering construction.
Underground Space and Engineering.
Engineering Management Journal.

Introduction Currently, steel-concrete composite box beam has been widely used in bridge engineering and hydraulic engineering.
Considering the engineering request and practice, referring to the steel structure design code, the experiment designed three prestressed steel-concrete composite box beams, which were numbered from PCB-51 to PCB-53.
Hu, Experimental research on flexural performance of prestressed composite beam with partial shear connection, Hydro-Science and Engineering, 3 (2011) 1-9
Shi, Ultimite flexural capacity of composite steelconcrete beams with partial shear connection, Engineering Mechanics, 3(2000) 37-42
Hu, Steel-concrete composite box beams torsional strength, China Civil Engineering Journal, 1 (2008) 1-11

Simulation of Particle Reinforced Composite Materials in Macro- and Meso-Scales Jun Guo1,a, Ran Guo1,b and Wenhai Gai1 1Faculty of Civil and Architecture Engineering, Kunming University of Science and Technology, Kunming 650500, China astar526191@163.com, bguoran99@mails.tsinghua.edu.cn, cgaiwenhai11@163.com Keywords: particle reinforce composite materials,homogenization theory,macro-and mesoscale problem,FEM,VCFEM Abstract.
Mechanics in Engineering, 2005, 27(3): 1-6
Journal of Materials Engineering. 2002, 6: 3-6
Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 1993, A172(1-2): 63-69
Computer Methods in Applied Mechanics and Engineering, 1993, 104: 211-247

Sewage sludge as raw-material in asphalt mixtures INGUNZA Maria del Pilar Durante a, JÚNIOR Olavo Francisco dos Santos b and MEDEIROS Sayonara andrade c Federal University of Rio Grande do Norte , Department of Civil Engineering.
Journal of Environmental Engineering. v. 117, n. 2, p. 236-46, (1991)
Journal of Environmental Engineering, v.110, v. 2, (1984) [4] H.
Journal of Sanitary Engineering, p. 352 - 354.
Post-graduation Program in Engineering, Federal University of Rio de Janeiro (2003)