The fault fracturezone has a significant impact on the progress and safety of tunnel construction, and it is necessary to determine the specific location and lithology information of the fault zone before construction. In order to ensure the smooth excavation and excavation of tunnels in the project, a combination of drilling and coring, natural source surface wave method, and comprehensive logging exploration methods were used to explore the specific characteristics of fault zones under complex geological conditions, and to conduct experimental analysis on their rock properties. The results indicate that under large-scale detection conditions, the natural source surface wave method can comprehensively survey the approximate characteristics of fault zones, and preliminary fault localization can be carried out based on the characteristics of wave velocity changes.The comprehensive logging method accurately identifies the specific location and distribution of faults based on parameters such as resistivity and natural potential, and provides quantitative analysis of the position, width, attitude, composition, cementation degree, and water content of fault zones. The combination of multiple methods improves the accuracy of fault fracture zone detection.

Land is the basis for villagers to carry out production and maintain their survival, and the mode of production and operation of agricultural land is the first and foremost manifestation of land use. Adequate scale operation of land is a major change in the mode of rural management, the key to crack the problem of agricultural development in China, and an effective way to increase farmers’ income and achieve rural revitalization through sustainable agricultural development. Therefore, CiteSpace software was used to sort out and the literature on moderate-scale land management was quantitatively analyzed to show the current status and future trends of research in the field of moderate-scale management of agricultural land. The focus of the future research on land management on an appropriate scale can be summarized as follows: expanding the research field, broadening the research perspective, improving the evaluation standards and research methods of agricultural land management on an appropriate scale, and carrying out spatial and temporal analysis of agricultural land management on an appropriate scale. This paper reviews the literature related to land scale management with a view to informing future research on land scale adequacy.

The maintenance base, as the “backstage” of highway maintenance projects, lacks unified green environmental construction standards and scientific management methods in the process of transformation and upgrading towards greening and intelligence. Therefore, it is unable to qualitatively evaluate the technical level of intelligence and greening of maintenance bases. combining the situation of green maintenance bases in Jiangsu Province and suggestions from relevant experts on the green evaluation system of maintenance bases, based on meeting the pollutant emission standards, the Analytic Hierarchy Process(AHP) and fuzzy comprehensive evaluation method were used to conduct star rating evaluations of green environmental maintenance bases from four aspects, such as green production, energy conservation and emission reduction technology, intelligent management and control, and operational management. A good green demonstration is served for the construction of new types of maintenance bases in the future.

The social network analysis(SNA) method was used to study the stakeholder relationship network in infrastructure investment projects, revealing the key roles and functions of project companies, construction units, supervision units, and survey and design units in the network. Research has found that project companies play a central role in the flow of information and resources, while construction and supervision units play important roles in connecting parties and bridging information. Although the current network density is low, strengthening stakeholder cooperation, optimizing network structure, and enhancing resource sharing can significantly improve project management efficiency and collaboration effectiveness. Specific measures and suggestions are proposed to enhance the overall management level of infrastructure investment projects and the synergistic effects among stakeholders. Future research can expand the scope of stakeholders, conduct dynamic network analysis, and explore the network characteristics of different types of infrastructure projects, provide more refined management strategies.

With the continuous development of civil aviation in China, research on the competence of flight dispatchers has demonstrated significant value. Based on the analysis of domestic and foreign literature and work practice, a competency evaluation index system for flight dispatchers was innovatively established, which included 8 primary indicators and 36 secondary indicators, with reference to the observable behavior proposed by the International Civil Aviation Organization. The combination weighting and cloud model, including G1 method and entropy weight method, were used for instance evaluation. The results show that the established indicator system can comprehensively and effectively evaluate the competency characteristics of flight dispatchers, which is scientific and reasonable.

Promoting the sustainable development of resource-based cities is an important task for deepening regional coordinated development and building an ecological civilization society. The SBM model was used to calculate the energy utilization efficiency of 282 prefecture level cities in China from 2006 to 2021 from three aspects, such as input, expected output and unexpected output. The National Resource based City Sustainable Development Plan(2013—2020) is regarded as a quasi natural experiment, and the impact of sustainable development policies on energy utilization efficiency is examined using the difference in differences method. It is found that the implementation of sustainable development policies has a significant positive impact on the energy efficiency of resource-based cities, and this conclusion still holds true after a series of robustness tests.

The construction forms of overlapping sections of shield tunnels are complicated, so it is urgent to investigate the response rules of existing buildings to the disturbance of tunnel construction, so as to reduce the potential construction risks. In this paper, the finite element method was used to simulate the influence of mud-water shield machine on the existing building foundation when the superimposed shield tunnel was driven. First, the down tunnel was excavated, then the up tunnel was excavated, and the concrete influence of this sequence on the stability of the foundation was studied. The simulation results are compared with the field monitoring data to verify the reliability of the model. The results show that the foundation bottom continues to settle when the tunnel is excavated. When the tunnel is excavated, the settlement of the foundation slows down and a slight uplift occurs. After the completion of the ascending tunnel, the settlement at the bottom of the foundation presents a linear distribution. In addition, the vertical load increases on the basis of the main influence of the stacked tunnel under the existing buildings, which makes the lining stress and deformation increase. The research results will provide design and reference value for cascade tunnel engineering.

At present, heavy metal pollution mainly composed of cadmium(Cd), lead(Pb), zinc(Zn), etc. is becoming increasingly severe, which greatly endangers the development of industry and agriculture and the health of people’s lives. Composite heavy metal ion pollution is the main form of pollution in industrial and agricultural production, and research on the remediation of composite heavy metal contaminated soil has practical significance. In addition, there is relatively little research on the use of acetic acid for the remediation of composite heavy metal contaminated kaolin, and its intrinsic remediation mechanism and reaction mechanism still need to be elucidated. In view of this, taking indoor simulated cadmium lead zinc composite polluted kaolin as the research object, electric remediation technology was adopted and different concentrations of acetic acid solution were used to remediate the composite heavy metal polluted kaolin. Combined with various testing methods, the internal remediation mechanism of polluted soil in the electric remediation process was deeply explored by analyzing the changes in electroosmotic flow, pH, conductivity, residual heavy metal ion and current.

In the context of digital economy, manufacturing enterprises promote high-quality development through digital transformation and upgrading. However, the single champion enterprises in manufacturing industry are different from large manufacturing enterprises because of their limited resources and lower scientific and technological innovation ability compared with large manufacturing enterprises, so how to achieve high-quality development through digitalization is worthy of in-depth discussion. Starting from the perspective of resource arrangement, “resource combination-resource bundling-resource utilization” was taken as the logical main line, taking 10 individual champion manufacturing enterprises in Shandong Province as the research object, the high-quality development path of individual champion manufacturing enterprises on the basis of field investigation and existing research was analyzed, multi-case analysis and rooted theory were combined, and a construction concept derived from practice for subsequent research is layed.

Green finance helps the development of low-carbon economy, which is not only a reflection of actively assuming environmental protection responsibilities and meeting the requirements of national energy conservation and consumption reduction indicators, but also a reflection of adjusting economic structure, improving energy utilization efficiency, and building ecological civilization. Henan Province is a province with large population, agriculture, industry and energy, and is one of the important economic regions in China. Firstly, relevant studies on green finance and low-carbon economy was sorted out, followed by correlation analysis based on historical data of Henan Province, and finally the specific situation of green finance and low-carbon economy development in Henan Province was discussed and analyzed, so as to explore the realization path in line with the current goal of Henan’s green finance to support low-carbon economy transformation.