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Research on bearing capacity of explosive expansion steel piles Shengfeng Shan1, a , Yong Du2, b , Shaoliang Huang3, c 1,2,3 College of Architecture and Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China ashanshengfeng@126.com, bdavidydu@yahoo.com, c18334702025@126.com Keywords: explosive expansion steel piles, the expanding section, bearing capacity Abstract.
As an improvement form of deep foundation, belled steel’s engineering research and application has matured.
In the engineering, the explosive expansion steel piles will be transported to the site and penetrated into the soil in the seabed at first.
[2] Jingbo An, Siyuan Zhao, Zhihui Deng:Geotechnical Engineering Technique, 2009, 23(6):284~287(in Chinese)
[4] Xuexian Sun, Hui Zhang, Ming Tian: Rock Mechanics and Engineering, 2007.26 (S1) :3101~3106(in Chinese)

Mohd Arif2,d 1Department of Civil Engineering, College of Engineering, University Malaysia Pahang, 26300 Gambang, Kuantan, Malaysia 2Faculty of Civil Engineering Technology, University Malaysia Pahang, 26300 Gambang, Kuantan, Malaysia ayouventharan@ump.edu.my, b*khesava47@gmail.com, crokiah@ump.edu.my, dmdarif@ump.edu.my Keywords: Alternative materials, Conventional Ballast, Concrete Debris, Bottom Ash, Gradation, Flakiness, Void Ratio, Permeability.
All these promising values of engineering properties exhibit the confidence of a suitable alternative to track ballast materials.
The engineering properties of the individual materials proposed in this research are recorded in Table 1.
The most widely used standards are the American Railway Engineering and Maintenance-of-Way Standard (AREMA) and the British Standard (BS).
Tang, “Mechanical properties of municipal solid waste incinerator (MSWI) bottom ash as alternatives of subgrade materials,” Advances in Civil Engineering, vol. 2020, pp. 1–11, 2020

The Prediction Model of Foundation Settlement in Linear Loading Condition Hongxia Yang School of Civil Engineering, Shandong Jiaotong University, Jinan, Shandong, 250023, China yanghongxia0531@163.com Keywords: Linear loading, Foundation, Settlement, Prediction model.
Based on observation data about foundation settlement of Ji-He expressway in Shandong province,according to the theory of soil mechanics,deduced the prediction model of foundation settlement in linear loading condition.Verified its reliability combined with engineering example.Analyzed the influence factors of key parameters and the causes of errors in the model.The model can be used to estimate the foundation settlement and the process of settlement in the later period and after construction, control embankment filling and pavement construction progress.
Secondly,the layered summation method can't consider instantaneous settlement and the secondary consolidation settlement, but the foundation settlement in practical engineering is the summation of instantaneous settlement, consolidation settlement and the secondary consolidation settlement.Thirdly,usually,the lower boundary is controlled by the thickness of compressible stratum when calculate foundation settlement, and it will be simplified into undrained-boundary which is differ from the reality [3,4].
References [1] Hui Liu,Hui Zhao.Foundation Engineering.People’s Traffic Press,2008,pp. 21-22.

Thermal Conductivity Model with Non-constant Boundary Condition in One-dimensional Semi-infinite Case Yu Bai1, a 1School of Science, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China abuceaby@163.com Keywords: thermal conductivity; non-constant boundary condition; one-dimensional Abstract.
The results obtained are useful for the thermal engineering science. 1.
Introduction Thermal conductivity is a very important phenomenon to the engineering science [1].
[5] Erwin Kreyszig: Advanced Engineering Mathematics (John Wiley & Sons Ltd, Hoboken 2011).

Application Study on GPS Positioning Technology for Gravity Wharf Deformation Monitoring Hao Zhang1, a，Min Ji1, b，Xi Shi1 and Sheng-liang Zhou 1 1College of Civil Engineering and Architecture, Zhejiang University of Technology, Hang Zhou, China, 310032 aemail: zhanghao@zjut.edu.cn, bemail: siling210@126.com Keywords: Gravity Wharf.
Abstract: This article took gravity wharf engineering as the object of study to explore its deformation law by using GPS positioning technology.
Engineering Application Engineering overview In Hangzhou, a certain inland wharf is constructed on a flat terrain with gravity-type structure.

Ganesh Prabhu4,b 1Department of Civil Engineering, Fatima Michael College of Engineering, Madurai, India 2Department of Civil Engineering, Alagappa Chettiar College of Engineering, Karaikudi, India 3Department of Civil Engineering, Sethu Institute of Technology, Virudhunagar, India 4Department of Physics, Sethu Institute of Technology, Virudhunagar, India amsbsivabharathy@yahoo.co.in, bgganeshprabhu@gmail.com, Keywords: Compressive Strength, Concrete, Granite Powder, Paste, Waste, Workability Abstract The ornamental granite stone-processing industries of Tamilnadu state produce tons of fine powder wastes during sawing and polishing.
So that the engineers are constrained to implement a new materials and techniques to efficiently combat this problem.
Holanda, Utilization of Granite Powder Waste in Ceramic Bodies for Civil Construction, Materials Science Forum, 498-499 (2005) 517-522
Taylor, Use of granite dust for making aerated concrete and ceramics, Key Engineering Materials, 53-55 (1991) 512-517

Hydration, Shrinkages and Mechanical Properties of Ultra High Performance Concrete Containing Blast Furnace Slag and Algerian Dune Sand Abdelfetah ZENATI1,2,a*, Mahfoud TAHLAITI3,b, Abdelhafid KHELIDJ2,c, Mohamed.Nadjib OUDJIT1,d 1Building in Environment Laboratory, Faculty of Civil Engineering, University of Sciences and Technology Houari Boumediene (USTHB), BP 32 EL Alia, Bba Ezzouar, Algiers, Algeria 2IUT Saint-Nazaire, GeM, CNRS UMR 6183, Research Institute in Civil Engineering and Mechanics, University of Nantes, France 3ICAM, School of Engineering Nantes, GeM, CNRS UMR 6183, Research Institute in Civil Engineering and Mechanics, Centrale Nantes, France.
[7] Karima ARROUDJ1, Saida DORBANI, Mohamed Nadjib OUDJITand Arezki TAGNIT-HAMOU, "Use of Algerian Natural Mineral Deposit as Supplementary Cementitious Materials", International Journal of Engineering Research in Africa: (2017) 08-31
European Journal of Environmental and Civil Engineering, Ed.
Engineering, 2011, 3, 569-576

By using software of finite element analysis on the joint effect of the direct bolt stress Weihua Xu1,a,*,Lixin Li1,b,TaoChen1,c 1School of Civil Engineering, Shenyang Jianzhu University,Shenyang, Liaoning, 110168, China Keywords:Stress concentration，Positive moment，Bolt hole，Shield tunnel lining Abstract: the lining of shield lining masonry joint part of the stress analysis by the finite element software ABAQUS, obtained the conclusion proved that,although the bolt for joint area is relatively small, but by the positive momentwhen the bolt hole will produce stress concentration phenomenon more obvious, this situation should be given more attention in practical engineeringresponse.
Establishment of finite element model (1) And a simplified joint mechanical model At present, China has built the subway shield lining to withstand bending moments generally between -150 ~ 200 KN • m, under this simulation in considering the actual premise of safety engineering for simplicity and comprehensive analysis of the different positive and negative torques on the bolts affected joints, whichever torque 220KN • m and -200 KN • m, eccentricity take - 0.1m.
Fig.6Bolt hole stress curve Fig.7Bolt hole stress curve Conclusion (1) of shield lining segment section when under positive moment force influence on the whole section is relatively large, produce the phenomenon of stress concentration near the bolt hole, and the circumferential stress changes in the larger joints, considering the strength whether meet the actual needs in practical engineering

Analysis of the Causes of the Formation of Crack in Inclined Web of Prestressed Concrete Continuous Girder Bridge in Cantilever Construction Lihua Lu 1,a, Peng Tian 1,b, Tao Yu 1,c 1School of Architecture and Engineering, Shenyang University of Technology, Shenyang 110870, China allh_wxy@yahoo.com.cn,btianpengsheering@126.com, ca372468566@126.com Keywords：continuous bridge; cast-in-place cantilever method; cracks in inclined web; ANSYS Abstract.The crack in inclined web of the prestressed concrete continuous girder bridge which is constracted by the way of cast-in-place cantilever method that become one problem that should be more cared about[1-2].
This paper analysis the bridge in three different conditions which are according to the pratical and special engineering to find the causes of the formation of crack in inclined web of prestressed concrete continuous girder bridge in cantilever construction.
In view of this situation, this paper which used the finite element software and based on the actual engineering of a prestressed concrete continuous box girder bridge construction process take three kinds of condition to simulate and analyze to find the reason of the formation of crack in inclined web and put forward the corresponding repair measures that is valuable to the design and construction of this kind of bridge.
Municipal Engineering Technology. 2004(5), In Chinese [7] Xingxing Xiao, Chenghua Li, Analysis of the Reason That Caused Web Diagonal Crack in Prestressed Concrete Box Girder Bridge during Cantilever Construction.
ANSYS Examples for Civil Engineering Application [M].

Simulation Analysis of Groundwater Source Heat Pump’s Underground Temperature Field Changes under Different Pumping and Injecting wells Modes Shumi ZHANG 1,2,a , Qing Gao 1,b 1Department of Thermal Energy Engineering , Jinlin Uinversity, Changchun130025; China 2Changchun College of Architecture and Civil Engineering azhangshumi2006@sina.com, bgaoqing@jlu.edu.com Keywords: coupled model; layout pattern of wells; thermal breakthrough Abstract.
The more number of pumping and injecting didn’t extend the time of thermal breakthrough, and didn’t affect pumping temperature significantly from the results of long-running, the layout pattern of wells with one pumping and two injecting presented significant advantages in practical engineering.
According to the establishment of the coupled model between the groundwater flow and temperature, the article from the pumping and irrigating wells’ space, the number of pumping and irrigating wells, simulated and predicated trend of groundwater temperature in the different layout mode of wells , provided a theoretical basis for practical engineering.
Increasing the number of pumping and irrigating wells contribute to delay heat through time. in actual engineering design, in order to save the initial investment and operating costs, the number of pumping wells may be appropriate increased.