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Control Conditions for the Second–Class Crack of Concrete Based on Different Modulus Theory Wenjuan Yao1, a, Yuting Zhou2,b and Jianwei Ma3,c 1 Department of Civil Engineering, Shanghai University, Shanghai200072, P.R.China a wenjuan@mail.shu.edu.cn, bshangdazhouyuting@163.com, chappylm208@yahoo.com.cn Keywords: different modulus; concrete; second-class crack Abstract.
Many engineering materials exhibit different elastic properties under the extension and compression.
Many researchers recently adopted the different modulus theory to analyze engineering structures [3-5].
Concrete is one of the most commonly used materials in the engineering.
However, its extension modulus and compression modulus are regarded as the same in engineering design, and the stress characteristics of concrete structure are calculated by the conventional elasticity theory.

Comparison Experimental Study on Subgrade Compaction Quality Test Methods Zhihong Nie School of Civil Engineering and Architrcture, Central South University, Chang-sha China; niezhih@126.com Key words: Subgrade engineering; Compaction quality; Continuous testing Abstract.
The principles of the continuous test methods for compaction degree is introduced based on subgrade engineering cases.
In the 1970s, studies were carried out on the continuous test methods for compaction degree in foreign countries and some of the results have been applied to engineering quality control.
LTD railway construction [2005]160 Provisional Standard for acceptance of construction quality of subgrade engineering for Passenger-dedicated Line[S].
Beijing, China railway publishing house (2005) China Railway [5] First Survey and Design Institute Group Ltd Code for soil test of railway engineering TB10102-2004[S].

Experimental Analysis of High-Strength Concrete Using Granite Aggregates Banda Lakshmi Sai Karthik1,a*, Akshat Mahajan2,b* and Sahil Jaggi3, c 1School of Civil Engineering at Lovely Professional University, Phagwara, Punjab, India 2School of Civil Engineering at Lovely Professional University, Phagwara, Punjab, India 3School of Civil Engineering at Lovely Professional University, Phagwara, Punjab, India asaikarthikbandha10@gmail.com, bakshat.23424@lpu.co.in, csahil.21178@lpu.co.in Keywords: High-Strength concrete, Trial Mixes, Granite Aggregates, Metakaolin, Silica Fume, Strength Properties, Durability Properties.
Influence of supplementary cementitious materials on engineering properties of high strength concrete.
In IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE (Vol. 11, Issue 3). www.iosrjournals.org [13] Khamchin, F., Rasiah, S., & Sirivivatnanon, V. (2015).
World Congress on Civil, Structural, and Environmental Engineering, 162-1-162–166. https://doi.org/10.11159/icsect20.162 [31] Kalpana, M., Vaidevi, C., Vijayan, D.
International Journal of Impact Engineering, 156, 103955. https://doi.org/10.1016/J.IJIMPENG.2021.103955 [39] Guo, Y.

Finite-Element Analysis of Ultrahigh Leaf-Shaped Steel Sculpture Mengsha Liu a, Ying Huang b, Jinsan Ju *c College of Water Resources & Civil Engineering, China Agricultural University, Beijing 100083 a2571921033@qq.com, b839356273@qq.com, cjujinsan@yahoo.com.cn Keywords: The steel sculpture; The finite element model; Structural parameter; The static calculation; The dynamic calculation Abstract.
It is hoped that the analysis of ultrahigh steel sculpture will offer some technical support for practical engineering.
Combined with the real engineering situation, the modal and spectrum analysis considering seismic action was used in ANSYS.
As for the actual engineering construction, it is suggest that groove welding technology should be used in the junction of steel tube with different sections.
Finite element analysis based on ANSYS can provide the theoretical support for the actual engineering design.

Research of Colliding Ground Vibration in Blasting Demolition Zepei Xu1,2,a Xibing Li1,b 1School of Resources and Safety, Central South University, Changsha, 410083, China 2School of Civil Engineering and Architecture, Changsha University of Science and Technology, Changsha, 410004, China axuzepei@163.com bxbli@mail.csu.edu.cn Keywords: Colliding ground vibration.
Comparing from the frequency and duration to the blasting vibration, with the engineering example, the analysis on the characteristics of colliding ground vibration has made.
Engineering Example The 90 meters chimney was directional blasting.
Engineering blasting, 2002 (4) .
Engineering blasting 2011 (3) .

The Seismic Investigations on Active Stone Structure Buildings（Concept and Principles） Yanghang Shi 1, a, Dehai Yu 2,b 1 Professor, Department of Civil Engineering, Huaqiao University, China 2 Master, Department of Civil Engineering, Huaqiao University, China a D.S666@163.com, b602621220@qq.com Key Words: stone structure; earthquake resistance;construction and review;stone building; stone culture.
Earthquake Resistant Engineering, (2):30-35. (1994) (in Chinese)
Earthquake Engineering and Engineering Vibration, (1):63-67. (2000) (in Chinese)
Earthquake Engineering and Engineering Vibration, (1):105-110
Earthquake Engineering and Engineering Vibration, (2):88-92. (2005) (in Chinese)

Seepage analysis and construction practice of anchorage circular foundation excavation in long-span suspension bridge LING Xiao1,2,a，WANG Ronghui1,b 1School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, China 2Guangzhou Transportation Commission, Guangzhou 510080, Guangdong, China alinxiaohnlg@126.com, bwangronghuiwrh@126.com Key words: Bridge engineering; anchorage; Foundation; seepage analysis Abstract：On the basis of preliminary exploration, complement exploration is executed to obtain excavation seepage analysis detail parameters.
According to geological conditions and engineering practice, it is more reasonable to increase the curtain grouting under the wall.
The grout curtain out of the foundation could be regarded as excavation and construction plans without actually implemented. 4 Engineering practice The anchorage diaphragm wall of Pearl River Huangpu bridge south adopts grouting program at the bottom of the wall, which started on April 14, 2005 and completed on July 28.
Chinese Journal of Rock Mechanics and Engineering, 2009, 10, 28(10): 2018-2023.
[5] Guang Dong Noneferrous Metals Engineering Investigation Design Institute.

A Study on Risk of Durability Failure for Construction Projects of Tunnels and Underground Projects Hongke Pan1, a, Zhongguo Zhang1,b and Linde Yang2,c 1School of Civil Engineering and Architecture, Zhongyuan University of Technology, Zhengzhou 450007, China 2Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China apanhk_sh@126.com, bzzg216123@163.com, ctjyanglinde@163.com Keywords: Underground Engineering Project; Risk Assessment; Durability; Reliability Abstract.
Tunnel and underground engineering projects have certain failure risks during construction and operation, including the risk of durability failure to which the study is not enough.
Introduction Construction of large underground engineering is of great significance.
References [1] PAN Hongke, YANG Linde and TANG Yongjing: Underground Space and Engineering.
[3] PAN Hongke, NIU Jishou and YANG Linde: Engineering Mechanics.

Study on Calculation of Settlement of Rigid Pile Composite Foundation under Embankment Load (Part I) Su-xian Liu 1, 2, a, Si-jia Liu 3, b 1School of Road and Bridge Engineering, Hunan Communication Polytechnic, Changsha, China 2School of Transportation Engineering, Changsha University of Science & Technology, Changsha, China 3Hunan Electric Power Design Institute, Changsha, China adorasusu@163.com, blciga@126.com Keywords: Rigid pile, Pile foundation, Composite foundation, Settlement analysis Abstract.
An engineering example was analyzed and shows in part II.
References [1] Alamgir M, Miura N, Poorooshasb H B, etal: Computers Geotechnics Vol. 18(1996), p. 267-290 [2] LI Yong-gang, ZHAO Chun-feng, LIAO Qian-xu, etal: Journal of Central South University Vol. 43(2012), p. 4501-4507 [3] LI Hai-fang, WEN Xiao-gui, GONG Xiao-nan: China Civil Engineering Journal Vol. 38(2005), p. 77-80 [4] ZHANG Yi-ping, Xu Dong: Journal of Zhejiang University-Engineering Science Vol. 41(2007), p. 71-75 [5] YANG Tao，XU Yong-fu: Rock and Soil Mechanics Vol. 25(2004), p. 243-246 [6] ZHAO Ming-hua, HE La-ping, ZHANG Ling: Rock and Soil Mechanics Vol. 31(2010), p. 839-845

Nondestructive Microscopy Test on Damage of Waterproof Material in Underground Engineering Qingguo Wang1,a, Qixin Yang1,b *, Yajun Jiang1,c and Juan Yang1,d 1Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China aqingguow@126.com, byangqixin113@163.com, cyajunjiang@126.com, dyangjuan287@126.com Keywords: spray-on waterproof material; XRM; porosity; connectivity; failure Abstract.
It is feasible to study on the failure of waterproof material in underground engineering with XRM.
For special water environment in underground engineering, it is quite difficult to study the damage and deterioration of spray-on waterproof material.
In the test NaOH solution with pH=12 was used to simulate alkaline water environment in underground engineering.
The exploratory experiment verifies that it is feasible to study on the damage of waterproof material in underground engineering with XRM.