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Research on Material Selection Standard of Graded Crushed Stone Base Course for Municipal Road Kai Liu1,2,a, Fang Wang3,b, Weihua Zhang2, Yuanrong Wang4 1Civil Engineering Center for Post-doctoral Studies, Hefei University of Technology, Hefei, Anhui, 230009, China 2School of Transportation Engineering, Hefei University of Technology, Hefei 230009, Anhui, China 3School of Civil Engineering, Anhui University of Architecture, Hefei 230601, Anhui, China 4Hefei Key Project Construction Administration, Hefei 230001, Anhui, China aronaldo_1@163.com, bwf7110807@163.com Keywords: municipal road, material, material selection standard, graded crushed stone Abstract.
The research results promote the popularization and application of graded crushed stone base course on municipal road engineering in Anhui province.
While the related specifications at home and abroad have given certain requirements about technical indexes of raw materials, the requirements are selected according to the average level of various materials’ properties.
Crushing value is tested according to crushing value test of coarse aggregate (T0316-2005) in test methods of aggregate for highway engineering (JTG E42-2005).
These materials can be used for various grades of municipal roads.

Research on Surface Failure Mechanism and Building Stability for Coal Mining Hong Ji1, a，Xueyi Yu2,b and Zhixing Gao3,c 1 School of Geologic and Environment Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi, 710054, China 2 School of Energy Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi, 710054, China 3Bin Chang production service area of Shaanxi province, Xian yang, Shaanxi, 712000,China amodena@sohu.com, byuxy@ xust.edu.cn, cgaozhixing@ xust.edu.cn Key words: stability; failure mechanism; deformation; key layer; numerical simulation Abstract.
The engineering geological condition of the mine goaf and the exploitation method are proposed with an engineering example.
Gradually it forms an integrated evaluation method which integrates the similar material physical simulation, numerical simulation and field detection based on the probability theory [2].
Under certain condition, the critical layer plays a key role in the control of surface subsidence.
Conclusions Coal mining damage is a difficult engineering problem which restricts the development of enterprise.

The Study of Safety Management in Constructional Engineering Rongjie Zhu1,a, Ying Peng2,b, Yuishui Chen3,c 1,2,3college of architecture and environment, Sichuan University, Chengdu, Sichuan, China a349187531@qq.com, b363418071@qq.com, c493548911@qq.com Key words: Safety management; Constructional engineering; Construction enterprises Abstract.
This thesis analyzes these major safety problems in constructional engineering management and gives effective measures that should be adopted in constructional engineering management in order to avoid accidents in building projects by improving the safety management level of constructional engineering.
Unqualified Building Materials and Machineries.
Materials are the material condition of construction.
Secondly, the information of materials should be mastered and the best should be picked out to stock.

Research on Key Technologies of Manufacturing Resources Sharing Platform Supporting SMEs Based on Web Services Junying Wei1, a, Peisi Zhong1, b and Chunfen Guo1, c 1College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266510, China ajdwjy0726@163.com, bpszhong@163.com, cguochunfen@163.com Keywords: Small and Medium-size Enterprises (SMEs), Function Analysis, Manufacturing Resources Sharing Platform, Key Technologies, Web Services Abstract.
The key technologies of the platform are discussed, such as the definition, classification, the information model, integration and the security management of the sharing manufacturing resources.
Narrow manufacturing resources mainly refer to the material elements needed to manufacture one component.
Being the bottom manufacturing resources in a manufacturing system [4], narrow manufacturing resources include machine, tools, fixtures, gauges and materials and so on.
Wang: Study on Several Key Problems for Networked Manufacturing Resources Integration Platform.

Research on the Calculation Method of Engineering Insurance Rate Based on Bill of Quantitles Weike Chen 1, 2, Peng Yu2，a Zhengyan Zhang2 1Department of Management , Tianjin University ,Tianjin, China 2Department of Management , Tianjin University of Technology, Tianjin, China aYP2011yupeng@126.com Key words: Engineering Cost; Engineering Insurance; Insurance Rate; Bill of Quantities Abstract: This paper introduces a calculation method of engineering insurance rate based on engineering cost.
The calculation of the pure premium rate is the key to determine the engineering insurance rate.
Insurance rate of unit engineering is calculated as: (6) is the insurance rate of unit engineering Y, is the engineering cost of part project X, is the engineering cost unit engineering Y.
Insurance rate of engineering project is calculated as: (8) is the insurance rate of engineering project W, is the engineering cost of engineering project W.
Civil engineering, one of the unit engineering, the total engineering cost is 2,781,459RMB.

Study on the Construction Technology of the Graded Granular Cushion at the Bottom of the Subgrade in Highway Engineering Cheng LI, Haoxuan Li, Muzi Zuo College of Architecture, Chang'an University, Xi'an, China 710064 Keywords: Highway Engineering; the Bottom of Subgrade; the Construction Technology of the Graded Granular Cushion Abstract.
The construction flow for the graded gravel at the bottom of the subgrade in highway engineering is as shown in figure 2.
(3) Concentration road-mixing method This construction method is mainly applied to the gravel materials extremely poor in natural gradation, the stone materials of one grade, or some engineering projects with special process requirements.
for ensuring the construction quality of the graded gravel cushion at the bottom of the subgrade in highway engineering; the quality testing of the materials entering fields and the training and improvement of the construction personnel’s technical quality should be enhanced for ensuring the standardized norms of the operations.
Disasters and Prevention and Control Engineering, 2008 (2): 72-75

Japan started to study stratospheric airship platforms at an earlier time, and plays a leading role in areas such as materials, energy, wind forecasts, thermal analysis and tracking control, and many other key technologies.
Airship key techniques include aerodynamic design, structural design, energy, envelope materials, power plant, environmental data collection, simulation environment test and outfield test.
Envelope Materials.
Zhang : SPACECRAFT ENGINEERING Vol.17(2008),p 70 [5] Lindstrand P.
Qu: Materials Engineering Vol.8 (1993), p. 44 [10] J.H.

Different engineering conditions and geological conditions will lead to different safety degree and failure mode of dam foundation.
Engineering conditions The outline of dam body and the distribution of rock body and structural planes in dam foundation are shown in Fig.1.The dam body section is 154 meters high, with the dam crest width of 50m and the dam bottom width of 166m.
The interbedded strata JC2-5～JC2-8, consecutive crushed zones Pn and the dam foundation surface are simulated by joint materials because they are slim and obviously anisotropic, other materials are simulated by isotropic elements.
Chinese Journal of Geotechnical Engineering,2003,25(4): 389～394
[4] Lai Guo-wei,Wang Hong-shuo,Lu Shu-yuan.Stability analysis of dam foundations with weak layer[J].Journal of the Wuhan Institute of Hydraulic and Electric Engineering,1987,20(4):1～10

Literature Review In recent years, the development of biodegradable hydrogels for tissue engineering has advanced significantly, with a focus on both natural and synthetic materials.
However, these materials can degrade quickly and lack mechanical strength, often requiring modification or blending with synthetic polymers to improve their stability and functionality in tissue engineering applications [6].
"Poly (Vinyl Alcohol) Hydrogels: The Old and New Functional Materials".
Journal of Materials Science: Materials in Medicine, vol. 18, no. 10, 2007, pp. 1961-1968. https://doi.org/10.1007/s10856-007-3072-1
Journal of Materials Science: Materials in Medicine, vol. 6, no. 2, 1995, pp. 71-75. https://doi.org/10.1007/BF00120410

Large Dairy Farms Biogas Energy Environment Engineering Technology Research Dong Yang1, a, Meng Zhang1,b, Linhua Zhang2, b, Xueting Liu3,b 1 Key Laboratory of Renewable Energy Utilization Technologies in Buildings of the National Education Ministry, Jinan 250101, China 2Shandong Provincial Key Laboratory of Building Energy Saving Technology, Jinan 250101, China 3School of Thermal Energy Engineering, Shandong Jianzhu University, Jinan 250101, China aydc1178@163.com, b476665085@qq.com Keywords: large dairy farms; dung waste; biogas engineering; technology.
Built in 1982 in Chengdu phoenix mountain is China's earliest farm animal husbandry king biogas engineering large biogas engineering [3].
Biogas Engineering Market Analysis and Forecast Biogas Market Analysis and Forecast.
Cow farms waste processing Biogas engineering report and pattern [A].
Large dairy waste anaerobic digestion engineering research [J].