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The eigenvalue of the durability index correlative with design include the design engineer, the depth of concrete cover, the design of main rebar and constructional rebar.
The director engineer for construction, the management of construction site, casting and vibrating techniques, and curing could influence the anti-corrosion performance of the immersed tunnel concrete structures.
Table 4 The eigenvalue of the durability index correlative with the concrete construction No. items calculating formula and the values range ΔTp, i 1 director engineer for construction 25～-10 25 2 concrete receive engineer of general contracting unit does not stay at concrete receive site permanently: -5 measure and register for raw materials: 5 5 3 casting management engineering commander does not stay at casting locale permanently : -5 0 4 casting highness of concrete 2(1.5- A17） A17:casting highness of concrete (m) (A17=2) -1 5 casting rate 20- A18 （10～-10） A18: maximal casting rate（m3/h）(A18=100) -10 6 vibrating using attached vibrator and inside vibrator in factory: 15 using attached vibrator in factory: 10 using attached vibrator and inside vibrator at cast-in-place: 5 using inside vibrator as usually: 0 without using inside vibrator: -25 15 7 curing using special curing technique: 10 using moisturizing films: 5 using common curing: 0 10 8 curing age
Port & Waterway Engineering, 2005 (9):45-48, 57.
(in Chinese) [3] Japan Society of Civil Engineers.

However, it is difficult for an engineer engaged in the maintenance of bridges to perform a detailed investigation for analyzing the safety and soundness of the bridges on a daily basis because there are many aspects that require maintenance.
They include (1) properties based on geological river topography, (2) properties based on river engineering and hydraulics, and (3) properties based on the structure of bridges and scour.
However, information of these parameters may not be disclosed to almost all rivers in Japan, and it is difficult for engineers engaged in maintenance to obtain accurate information.
From these results, the developed model generally reproduced the engineering knowledge that the damage risk increased as hi increases and dsi decreases.
Journal, Vol. 12, No. 4, 2018, pp. 319-327 [2] Samizo, M., Wtanabe, S., Sugiyama, T., Okada, K., Proposal of a statistical estimating method for scouring apprehended bridge piers under flood conditions, Journal of JSCE D3 ( Civil engineering planning), Vol. 69, No. 3, 2013, pp. 237-249 [3] Kabeyama, Y., Kadono, T., Okazaki, Y., Nakamura, T., Okazaki, S., Kajitani, Y., Watanabe, S., Samizo, M., Development of a model for evaluating risk of disaster due to scouring around the pier based on machine learning, Journal of JSCE B1 (Hydraulic engineering), Vol. 76, No. 2, 2020 [4] Harris, T., Credit scoring using the clustered support vector machine, Expert Systems With Applications, Vol. 42, No. 2, 205, 2015, pp. 741-750 [5] Akagi, M., Nakamura, Y., Higaki, T., Narita, K., Honda, Y., Zhou, J., Yu, Z., Akino, N., Awai, K., Deep learning reconstruction improves image quality of abdominal ultra-high-resolution CT, European Radiology, Vol. 29, No. 11, Vol.11, 2019, pp. 6163-6171 [6] Ghobadian

Şahin1, a and S.Yalcinkaya 2, b 1Department of Manufacturing Engineering, Faculty of Technology, Gazi University, Besevler-06500, Ankara, Turkey, Tel: +90 312 2028671. 2Department of Mechanical Engineering, Faculty of Technology, Marmara University, Kadikoy, 34722 Istanbul, Turkey, Tel: +90 532 4727900.
Good and precise surface finish are demanded in many engineering applications because it minimizes friction and wear.
Rao., Experimental analysis and modelling of grinding AISI D3 steel, International Journal of Recent advances in Mechanical Engineering (IJMECH), 4, (1), (2015), 47-60
Journal of Engineering Research and Applications, 5, (1), (2015), 100-104
Singh., Effect of process parameters on micro hardness of mild steel processed by surface grinding process, Journal of Mechanical and Civil Engineering 10, (6), (2014), 61-65

Bidirectional Behaviour of Unstiffened and Stiffened Direct-Welded Connections for Square CFST Columns Helmy Tjahjanto1,a*, Gregory MacRae1,b and Anthony Abu1,c 1Department of Civil and Natural Resources Engineering, University of Canterbury Christchurch, New Zealand ahelmy.tjahjanto@pg.canterbury.ac.nz, bgregory.macrae@ canterbury.ac.nz, canthony.abu@ canterbury.ac.nz Keywords: concrete-filled steel tube, direct-welded, internal stiffener, doubler plates, bidirectional loading Abstract.
Leon, "Suitability of CFT columns for New Zealand Moment Frames," Bulletin of the New Zealand Society for Earthquake Engineering, vol. 48, no. 1, March 2015
Morita, "Elastoplastic Behavior of Panel Zone in Steel Beam-to-Concrete Filled Steel Tube Column Moment Connections," Journal of Structural Engineering, vol. 131, pp. 1841-1853, 2005
Tagawa, "Seismic Behavior of 3D Steel Moment Frame with Biaxial Columns," Journal of Structural Engineering, vol. 127, no. 5, pp. 490-497, 2001
Kunnath, "Effect of bidirectional interaction on seismic demand of structures," Soil Dynamics and Earthquake Engineering, vol. 52, pp. 27-39, 2013

Influence research of underground caverns blasting excavation on Excavation Damage Zone of adjacent cavern Pengcheng Xu1, 3, a, Qian Dong1,2 , Xinping Li2, b and Yi Luo1,2 1School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan , China 2 Hubei Key Laboratory of Roadway Bridge & Structure Engineering, Wuhan University of Technology, Wuhan , China 3Sinohydro Group Ltd, Beijing ,China adongqianse@126.com, bxinpingli@whut.edu.cn Keywords: Blasting vibration test, excavation damage zone, blasting seismic wave, numerical simulation Abstract.
Chinese Journal of Rock Mechanics and Engineering, 2009, 28(1): 30-38.
Chinese Journal of Rock Mechanics and Engineering, 2010, 29(3): 493-500.
Chinese Journal of Rock Mechanics and Engineering, 2010, 29(3): 513-519.
Engineering Journal of Wuhan University, 2008, 41(1): 67-70.

Study on Hydraulic Characteristics and Optimization of Siphon Channel with Two Inlets in Drydock Peng Zhao 1, 2, a, Yuchuan Bai 2, b 1Tianjin Research Institute for Water Transport Engineering, Key Laboratory of Engineering Sediment, Ministry of Transport, Tianjin 300456, China 2School of Civil Engineering, Tianjin University, Tianjin 300072, China azhao_peng@live.com, bychbai@tju.edu.cn Keywords: drydock; siphon channel; hydraulic characteristics; optimization Abstract.
Port & Waterway Engineering(In Chinese),1987,12(7):8-12
Journal of Hydroelectric Engineering(In Chinese),2010,29(1):50-56
Journal of Hydraulic Engineering(In Chinese), 2004,35(5):31-38
Journal of Hydroelectric Engineering(In Chinese), 2003,7(1):61-69.

Security reliability analysis of circulating water pump house pit excavation of Chen Jiagang power plant Jian Pan 1, a, Xiaoyong Ding 1, b 1Department of Civil Engineering and Transportation, South China University of Technology, Guangzhou, China acvpan@scut.edu.cn, bDingxiaoyong2020@126.com Keywords: well dewatering, reliability, variation, probability, feedback system, pit excavation.
Project overview Engineering background.
[3] GB50497-2009, Technical code for monitoring of building excavation engineering.
Factors of safety and reliability in geotechnical engineering.
Journal of Geotechnical and Geoenvironmental Engineering. 126(2000) 307-316.

[5] Xiaobing Zhou, Wu Che: Water & Wastewater Engineering Vol. 3 (2009),p.120-124(In Chinese)
[15] Ping Xu, Junqi Li, Jing Guo, et al: Journal of Beijing Institute of Civil Engineering and Architecture Vol. 4 (2005),p.45-50(In Chinese)
[20] Wu Che,Lan Ou,Hong Liu, et al: Water & Wastewater Engineering Vol. 9 (2001),p.38-41(In Chinese)
[25] Jindong Xiao, Daizong An, Heng Liu, et al: Journal of Materials Science and Engineering Vol. 5 (2004),p.757-759(In Chinese)
[42] Steven Strom, Kurt Nathan, Jake Woland: Site Engineering for Landscape Architects (John Wiley & Sons,Inc.

Materials Science and Engineering A 488(2008) 601 [6] M.
Materials Science and Engineering A 298(2001) 193 [8] S.
Materials Science and Engineering A 528(2011) 1707 [10] Y.
Materials Science and Engineering A 147(1991) [14] K.
Materials Science and Engineering A 527(2010) 1630 [15] K.K.

Structural damage detection of the simple beam based on responses phase space Cheng Cheng1,a, Zhenhua Nie2,b, Hongwei Ma3,c 1College of Science & Engineering, Jinan University, Guang Zhou, Guang Dong, China,510632 2The Key Laboratory of Disaster Forecast and Control in Engineering, Ministry of Education of China, Guangzhou, China, 510632 atmahw622@gmail.com, bcc391357271@163.com Keywords: Structural damage detection, Phase space reconstruction, Acceleration response, Time series, Simple beam.
However, these methods have a lot of difficulties in engineering application as these methods exist many problems such as they are mostly based on theoretical analysis, model test and simulation analysis.
In fact, in practical engineering, current methods still suffer from the same problems in judging damage existence and degree which play a very important role in structural heath monitoring.
However, using the chaotic sequence as excitation source in actual civil engineering structure is almost impossible, so the response under ambient excitation or impulse excitation must be studied.
Trendafilova: Key Engineering Materials, 2003, 245-246:547-556 [7] J.M.