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Figure 1 shows that after schedule risk led directly to increased risk of schedule pressure, and the pressure will directly affect engineering quality risk, the number of new employees, production efficiency and work intensity.
Most operations in preparation for the initial engineering work, temporary work intensity and therefore does not increase the intensity of work lags behind the schedule pressure.
Engineering quality risk are subject to risks affecting the environment, technology risk factors, these factors prior to the start of construction projects , it already exists , so the quality of the project risks early value is not 0.
Research on risk management of construction engineering system dynamics.
Management of civil-engineering design projects: a SD model.

Constitutive Relation of Sulfate Attacked Concrete Based on Uniaxial Loading Yanfeng Nie and Chunxiang Qian School of Materials Science and Engineering, Southeast University, Jiangsu Key Lab on Civil Engineering Materials, Nanjing 211189, China Keywords: Concrete; Sulfate attack; Ultrasonic nondestructive test; Constitutive relation Abstract.
For practical engineering applications, special attention of research was devoted to an ultrasonic nondestructive test (NDT) technique to estimate the damage extent.
Therefore, there is research significance to study the constitutive relation in different damage extent and its changing trend with serviceable life, no acording to the time，to provide a reference for the design of structural components of concrete and test and evaluate in actual engineering.
An analytical expression for the stress-strain curves of concrete attacked by sulfate is desirable for the structural analysis and design in many practical engineering applications in China and Abroad.
Mathematical expression of correlation can provide evidence for quality evaluation and testing of actual engineering.

The Load Carrying Mechanism of Plate-Chair Type Retaining Structure Qian Su1, a, Jian Zhang1, b*, Wenhui Zhao1, c, Licai Zhang1, d 1School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China asuqian@126.com, bswjtuzhangjian@163.com, czhaowh1989@163.com, d18382405892@163.com Keywords: Plate-chair type retaining structure, Load carrying mechanism, Soil-structure interaction, Numerical simulation Abstract.
The result shows that the method is simple, safer, suitable for designing and can be used in the similar engineering.
Now it requires to do fill and excavation engineering in the area and the largest fill thickness is about 19 meters.
Generally we use limit equilibrium method or transfer coefficient method to calculate the landslide thrust in the railway engineering.
[4] Zihang Dai: Journal of Rock Mechanics and Engineering. 21(2002), p.517-521 (in chinese)

However, the present design code of our country seems not keep pace with the engineering practice.
The existing method, although embodying the philosophy of performance-based earthquake resistance design framework, in ‘the seismic design code of railway engineering’ is only applicable to those girder bridges with spans smaller than 150m.
The existing work concerned with this topic is not enough to meet with the requirement of the engineering practice.
The FEM software such as MIDAS-Civil and SAP2000 are applied to accomplish the research activities concerned.
Ministry of Railway of the People's Republic of China , GB 50111-2006, Code for Seismic Design of Railway Engineering, Peiking: People's Communications Press, 2009 2.

The ratio of concrete in coarse aggregate has great impact on engineering quality.
If there are any proportion problems, a certain degree of engineering accidents and sometimes even devastating accidents can be caused.
Introduction Whether in industrial buildings, civil construction, bridge engineering or road project construction process, cement concrete is one of the most widely used material consumption.
The rational allocation of concrete mixture ratio in coarse aggregate has a special important role and significance in reducing engineering cost, so it has higher promotion value.
RCC base application in Shenzhen Huanggang road pavement repair engineering [J].

China 2Department of Construction Engineering, Shandong Urban Construction Vocational College, Ji’nan, Shandong 250101, P.
China 3School of Traffic Engineering, Shandong Jianzhu University,Ji’nan, Shandong 250101, P.
,Mechanistic Seismic damage model for reinforced concrete :Journal of Structure Engineering,ASCE,1985,111(4), p.722-739
[5] Dongsheng Wang,Qimin Feng,et al.A modified Park-Ang seismic damage model considering low-cycle fatigue life:China Civil Engineering Journal.2004, 37(11), p.41-49.
(in Chinese) [7] Xin Luo，Xingwen Liang.Analyses of seismic damage model for high-strength concrete shear wall:Journal of Earthquake Engineering and Engineering Vibration, 2012, 32(4), p.145-151

The embedded non-destructive monitoring system in different countries, such as the researchers in the civil engineering from Aachen University Germany have invented the non-destructive durability testing system which was the ladder anodes embedded in concrete structureand After-Loading-Annular-Anode monitoring system.
Computer Engineering and Applications, 2003(21):122-125
China Harbour Engineering,2004(6): 1-3
China Harbour Engineering,2010(01):75-79
Engineering Mechanics, 2011(12):78-84

Application of Increment-Dimension Precise Integration Method in Numerical Simulation of Two-phase Oil-water Flows in a Low permeability Reservoir Fuliang Mei 1, a, XiangSong Wu 1,b and Guangping Lin 1,c 1 Institute of Civil & Engineering, Jiaxing College, Jiaxing ,Zhejiang ,314001,China aFlmei2005@126.com, bWxiangsong@163.com, cLgp215@sohu.com Keywords:.
The start-up pressure gradients have an outstanding effect on recovery degree, liquid production rate and oil production rate, and the existence of the startup pressure gradients will enhance development difficulty and cost Introduction In the numerical simulation of two-phase oil water seepage for a low permeability reservoir, the simulating method used by most of researchers and engineers is IMPES[1-5], say, implicitly solving pressure and explicitly solving moisture saturation at time.
[3] Y.C.Guo, Q.H.Zeng,Z.X.Wang: Engineering Mechanics (in Chinese) (2006) [4] S.Q.Cheng ,M.Z.Chen: Shiyou Kantan Yu Kaifa (in Chinese) (1998)

Vibration Control of an Engine Mount for UAV Activated by Piezostack Actuator Jong-Seok Oh1, a and Seung-Bok Choi1,b 1Department of Mechanical Engineering Inha University, Incheon, 402-751, Korea aojshero@gmail.com, bseungbok@inha.ac.kr Keywords: Unmanned Aerial Vehicle (UAV), Engine Mount, Piezostack Actuator, Active Vibration Control, Sliding Mode Controller Abstract.
UAVs are also used in civil applications such as police observation and reconnaissance support in natural disasters.
W., “Performance Evaluation on an Active Camera Mount system for UAV via Hardware-in-the-loop-simulation”, Transaction of the Korea Society for Noise and Vibration Engineering, vol. 20, no. 8, pp. 767~773 (2010) [4] Park, D.
B., Active Vibration Control of UAV EO/IR Sensor Mount Using Piezoelectric Actuator”, Transaction of the Korea Society for Noise and Vibration Engineering, vol. 18, no. 12, pp. 1278~128 (2008) [5] Edward, C. and Spurgeon, S.

Optimal Design of Low-Grade Highway Barrier LEI Zhiyi1, a, ZHANG Xuesong1, b 1College of Civil and Transportation Engineering, Hohai University, Nanjing, P.R.
References [1] LEI Zhengbao, YAN Haiqi, ZHOU Pinyan, YU Jinxiu and ZHOU Zhigang, in: Simulation Analysis for Collision Characteristics of Concrete Barriers on Montane Highway, volume 1 of Journal of Traffic and Transportation Engineering, (2007)
[4] LI Junli, GUO Xiucheng: Traffic Engineering Facility Design (China Communications Press, Beijing 2006)