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Introduction It is rare to use only one heat exchanger to meet the heating and cooling requirements in practical engineering application of the ground source heat pump technology.
In addition, as figure 7 and figure 8 show the unit well deep heat transfer for each well of the two well group is respectively 63and 61.5, when heat pump running 10 days, their relative error is 2.4%, and the need for the engineering calculation is satisfied, so when we calculate the Wells group of heat transfer numerical calculation, 9 Wells model can be taken as an example to the illustrate the general rules of heat transfer in well groups. 5 Calculation of heat transfer for well In the past, the calculation of heat exchange for the underground well exchangers was usually attained by means of multiplying the amount of a single well’s heat transfer by well number.
Summary It is very necessary to calculate the heat exchange amount in a well group reasonably in order to optimize the operation mode of a system in practical engineering, distribute the well group rationally and make full use of the geothermal energy.
Introduction by: Zhang Dan (1983 -), female, School of Civil Engineering, Henan Polytechnic University, mainly focus on the ground source heat pump technology research; Address: Henan Polytechnic University in Jiaozuo of China School of Civil Engineering Henan Polytechnic University No.2001, Century Avenue, Jiaozuo City, Henan Province, P.

Design of Experiment Equipment for Treating Low Temperature Domestic Sewage Using Biological Contact Oxidation Process Ying Li1, a , Jing Zhou2,b 1Key Laboratory of Urban Stormwater System and Water Environment (Beijing University of Civil Engineering and Architecture), Ministry of Education, Beijing, China a liy@bucea.edu.cn , b 247420322@qq.com Keyword: biological contact oxidation tank; biological contact sedimentation tank; domestic sewage Abstract: According to the biodegradability of wastewater and better adaptability of biological treatment processes, and advantages of using biological contact oxidation process to treat sewage, biological contact oxidation method was used to study the removal conditions of domestic sewage treatment in high latitude area, and a set of experimental device of biological contact oxidation method applied in treating domestic sewage in low temperature was designed, to solve the serious pollution of domestic wastewater and its higher treatment
Design of biological contact oxidation tank In engineering design, velocity v0 of the center tube in vertical flow sedimentation should not be more than 100mm / s generally, set bell mouth and the reflector at the end to relieve the water speed and turn them up.
H = h1+h2+h3+h4+h5=50+310+30+60+125 = 575 mm Acknowledgements The Specific research of Beijing Institute of Civil Engineering and Architecture “Construction of new rural environment in Beijing and the sustainable use of resources”(100705403); Beijing Academic Innovation Group in Urban Stormwater System and Water Environmental Eco-Technologies (PHR201106124) Reference [1] Wang Yongrui, “Flotation-Biological Contact Oxidation Process for the Treatment of Tannery Wastewater”[J], Environmental Pollution & Control,1991.4 [2] Fu Yaozong, Environmental Pollution Control Engineering Design Manual Pollution Of Water Environment And Prevention Measures, Jiangsu Science And Technology Publishing House,1990.9
[4] Zhou Zengyan, a New High- Effect Biological Contact Oxidation Process-Floating Bed Reactor, College of Environmental Science and Engineering, Tongji University

An Analytical Expression of Motion Equations of SSI System Ying Li 1, a and Zhiying Zhang 1, b 1 School of Human Settlement and Civil Engineering, Xi’an Jiaotong University, Xi’an, Shanxi, 710049, China a115171626@qq.com, bzhangzhy@mail.xjtu.edu.cn Keywords: SSI system, Motion domains, Continuity of dynamic system.
However, theoretical analysis of SSI effect cannot accord with engineering applications because the analysis of SSI system is too complicated to be studied with a comprehensive theoretical basis.
This makes the analysis of SSI system become very hard with no advantages of engineering applications, because there is limited knowledge of the real model of non-classical damping system which has been well grasped.
[2] Dong Chen in: Construction and Engineering (In Chinese), Vol. 24(2008), p. 125-126
On nonlinear dynamic analysis in the frequency-domain - algorithms and applications[J]. earthquake Engineering & Structural Dynamics, Vol. 23(1994), issue 4, p. 363-388

One of the major limitations for wider use of pultruded fiber reinforced polymeric (PFRP) composites in the civil engineering sector has been their behavior under elevated temperature and ultimately fire.
"Creep and Failure of a Full-Size Fiber Reinforced Plastic Pultruded Frame," Composites Engineering, Vol. 2, No. 3, pp. 213-227. 2.
N., (1987). "26-Year Creep and Recovery of Poly(Vinyl Chloride) and Polyethylene," Polymer Engineering and Science, Vol. 27, No. 8, April. 5.
"Fire Resistance Simulation of Loaded Deck Sandwich Panel and Deck-Bulkhead Assembly Structures," Composites Part B: Engineering, Volume 38, Issue 2, March, pp. 191-195.

Study on New Reinforcing method of Steel Beams with Large Web Opening Wenyuan Liao1, a, Longqi Li1, b 1Faculty of civil Engineering, Kunming, University of Science and Technology, Kunming 650224, China alwy065@126.com, blilongqiqingdao@sina.com Keywords: Large Web Opening, Reinforcement, Stiffeners, FEM, Non-linear Abstract.
Some reasonable suggestions are proposed for engineering application.
From the perspective of bearing capacity, these two new kinds of methods can satisfy the need of practical engineering.
Compared with web opening without stiffeners, the deformation capacity enhances obviously, can also satisfy the need of practical engineering.

Due to the advantages, it attracts high attention and used widely in the geotechnical engineering fields.
The ANN-based method is unique and potentially more useful to the geotechnical engineer, as it imparts valuable information about the soil’s assumed engineering properties.
[2] Douglas, J.B. and Olsen, R.S., “Soil classification using electric cone penetrometer”, Proc., Conference on Cone Penetration Testing and Experience, American Society of Civil Engineers, St.
[7] Kurup, P.U. and Griffin, E.P., “Prediction of soil composition from CPT data using general regression neural network”, Journal of Computing in Civil Engineering, 20(4), 2006, pp 281-289
Journal of Geotechnical and Geoenvironmental Engineering, 125(3), 1999, pp 79-186

Analysis of Viscoelastic Mechanical Model of Recycled Asphalt Mixture Based on Bending Creep Test Yanhai Yang1, a, Hua Cai1, b, Minjiang Zhang1,c and Yan Xu1,d 1School of Civil Engineering, Shenyang Jianzhu University, China ayangyanhai168@126.com, bzhangminjiang1@163.com, c489831239@qq.com, dxuyan@126.com Contact: Yanhai Yang,Dorctor,Professor.Phone number: 13898890527; E-mail：yangyanhai168@126.com Keywords: Road engineering, Asphalt pavement, Recycled, Creep test, Mechanical model, Fitting Abstract.
Viscoelastic mechanical model of recycled asphalt mixture is studied based on pavement maintenance engineering of Shenyang-Shanhaiguan expressway, and with analysis of material performance we could collect testing data from bending creep test on small beam, obtain testing parameters through fitting method.
Chinese Journal of Geotechnical Engineering, 2001, 7(4):467~471
[6] Standard Test Methods of Bitumen and Bitumen Mixtures for Highway Engineering [S].JTJ 052-2000.Beijing:China Communications Press,2000
[7] The Methods of Aggregate for Highway Engineering [S] .JTG E42-2005.

These may be references to the applications of recycled concrete in engineering.
Recycled coarse aggregate is one of the effective methods to solve the above problems.How to use of waste concrete rationally in civil engineering is important to safety, economic and environment.
The waste concrete can resume original behavior and can be applied in new concrete structures, thus concrete recycle in construction engineering can achieve zero discharge[1].
The mechanical properties of RC such as the compressive strength, splitting tensile strength, the elastic modulus of test blocks in 3 days, 7 days, 14 days, 28 days and 60 days are discussed and analyzed, which may be references to the applications of RC in engineering and background supports to the local regulations making.
The experiment was completed in complex lab in School of Civil Engineering, The experiment layout 4 strain measuring points in four surface of the prism[6] .

Ostertag2,b 1Dept. of Art + Architecture, University of San Francisco, 2130 Fulton Street, San Francisco, California 94117-1080 USA 2Dept. of Civil and Environmental Engineering, 760 Davis Hall, University of California, Berkeley, California 94720-1710 USA ahmori2@usfca.edu, bostertag@ce.berkeley.edu Keywords: adobe, seismic reinforcement, fabric reinforcement, low-cost methods.
A secondary motivation for this investigation was to address the need for such engineering solutions to be highly affordable to those most likely to build with adobe block.
Earthquakes have ravaged many regions of the world, and while advancements in engineering and life-safety codes have resulted in significant improvements in performance of modern structures, we must also seek out methods by which traditional building systems, which continue to house large numbers of people, can withstand the scrutiny of modern safety criteria.
All tests were conducted in the Department of Civil and Environmental Engineering at the University of California, Berkeley.
“Seismic Protection of Earthen Buildings”, Proceedings of the International Conference of Seismic Engineering, Lima, Peru

Vertical Vibration of Pile Groups in Soil Described by Fractional Derivative Viscoelastic Model Jiumin Sun1, a, Linchao Liu2,b and Qifang Yan 2,c 1Department of Pavement and Bridge Engineering, Henan Vocational Technical College of Communications, Zhengzhou, Henan, 450005, China 2School of Civil Engineering,Xinyang Normal University, Xinyang, Henan, 464000, China azzsjm@163.com, bllc109@sohu.com, cyqf815@sohu.com Keywords: Fractional Derivative; Viscoelsatic; Vertical Vibration; Dynamic Impedance; Method of Layer.
Due to the complicated computation and programming limits, FEM and BEM may not provide satisfactory results for large scale engineering projects.
Earthquake Engineering and Structure Dynamics,Vol. 20 (1991), p. 115 [5] Novak M.
Journal of Geotechnical Engineering, Vol. 114 (1988), p. 1002 [7] Xuhong Zhou, Jianguo Jiang, Yinsheng Zhou.
China Civil Engineering Journal, Vol. 38 (2005), p. 87 (in Chinese)