Based on the theory of foundation pit deformation and seepage, the excavation of foundation pit considering seepage is calculated and analyzed by Midas/GTS software, and the optimization of design parameters is discussed. The topic of this paper is correct, the research methods and ideas are reasonable, the work content is substantial, and the research results are innovative. It shows that the author of this paper has a solid theoretical foundation and professional accomplishment. However, there are still some minor problems in the paper, and the technical roadmap needs to be improved and perfected.
In short, the overall quality of the thesis is good, and I agree to pass and participate in the graduation defense! Foundation pit engineering refers to supporting structure, dewatering, earthwork excavation and backfilling, including survey, design, construction, monitoring and testing. Ensure the safety of foundation pit construction, and the underground main structure and surrounding environment are not damaged. Foundation pit engineering is a comprehensive system engineering. Foundation pit engineering is an ancient traditional subject in soil mechanics foundation engineering, and it is also a comprehensive geotechnical engineering problem, which involves not only the typical strength, stability and deformation problems in soil mechanics, but also the interaction between soil and supporting structure.
In view of a foundation pit project in Shenzhen, Midas/GTS finite element analysis software is used to simulate the step-by-step excavation under the premise of considering seepage, and the calculated results of deformation and surface settlement of supporting structure are compared with the measured values.
The research shows that before the foundation pit excavation, the groundwater level in the surrounding soil is high, and the soil is in a state of natural seepage balance; With the precipitation before excavation, soil consolidation settlement occurs, which causes the deformation of foundation pit support and the surrounding surface settlement, which threatens the safety of surrounding buildings and is not conducive to the stability of foundation pit.
Comparing the simulation results with the measured settlement values, it is found that the excavation step of foundation pit, the change of seepage field of graded precipitation, the arrangement of supporting piles, the support stiffness, the distance between the surface and the foundation pit, and compaction grouting are important factors affecting the deformation of supporting piles and the settlement of surrounding buildings.
The simulation results show that when the number of excavation steps is small and the excavation time is long, the settlement and uplift deformation of the foundation pit and its surrounding area are small. It shows that in the process of excavation, small footage, multiple excavations and timely support can be used to strengthen the stability of foundation pit support for unstable soil sections. By calculating the settlement, the influence range coefficient of settlement is obtained; The supporting system used in engineering practice is optimized, and the obtained scheme is more reasonable and economical than the original scheme. The inversion of construction performance parameters shows that the deformation curve of the support is closer to the measured curve and the error is smaller.
The theme of the paper is prominent, the structure is rigorous, the level is clear, the logic is strong, the text expression is concise and clear, and the format of charts, formulas and references is standardized. The adopted technical route and related theories are correct and the conclusion is credible. To sum up, the paper reflects that the author has been able to use the relevant theories of geotechnical engineering to study the problems existing in practical engineering, and can use professional knowledge to solve practical engineering problems, so as to achieve the training objectives of master students and the requirements of dissertation, and agrees to submit a defense.
Expert opinions recommended by three master's theses 2. The value and significance of the topic, the workload, the problems existing in the standardization of writing, and suggestions on whether the evaluation results can be submitted for defense.
Land reform is a hot field of current research, which has been widely concerned by academia and society. Students' choice of "land expropriation compensation system" for research is innovative, the subject is difficult and the workload is moderate, which meets the professional training objectives.
Based on the problems existing in the current land expropriation compensation system, this paper analyzes the research status of land expropriation compensation system in China, that is, comprehensively analyzes the related problems of land expropriation compensation system, and designs short-term, medium-term and long-term solutions. ......
The paper shows that the student has consulted a large number of documents and materials, and has a certain ability of literature review and data collation. The content of the paper is relatively complete, the hierarchical structure is clear, the main points are prominent and the logic is strong, which shows that the student has a certain ability to work independently. The text of the paper is fluent and achieved. Undergraduate training objectives.
In my opinion, the thesis has reached the level of bachelor's degree thesis, and I agree to defend the thesis.
Master thesis recommendation 3 Expert comments 3 (1) results
Brand building has always been regarded as the task of advertising companies. The view that "enterprise value innovation" needs to be tied up with "brand building (aiming at consumers' desires and needs)" put forward by Ping Dong is of strategic significance.
In the functional stage of enterprise production and consumer use, enterprises complete products; When the production and consumption needs of enterprises no longer simply stay in function, but realize a new way of life, you will find that the development space of enterprises will become narrower and narrower only by using traditional concepts as business guidance; Once the enterprise's values include the new thinking of "satisfying consumers' desires and needs", it means that the enterprise has broken through the original values; If the full understanding of consumer demand is implemented in the enterprise operation system, it will help enterprises adjust their business routes; This innovation of values will lead enterprises out of the predicament, make enterprises and consumers stand on the same platform, and realize the harmony of production, sales and use.
Such value innovation can not only make enterprises adjust to the realm of "people-oriented", but also consciously resist those unscrupulous behaviors for the benefit. It can also help enterprises to improve the adjustment of brand strategy and produce harmonious products for consumers with the concept of harmony (this harmony includes: energy saving, environmental protection, humanization, personalization and beauty).
(ii) Defects
The innovation of enterprise values plays an important role in brand building: it helps enterprises to incorporate the formulation of brand ideas into the brand strategic thinking system, and when advertising companies are required to create brand advertisements, they know how to judge the creative works of advertising companies, which overcomes the passivity of lacking judgment in the face of creative proposals in the past and is conducive to brand management and rational use of advertising funds. Although this view is spread in the paper, it is not clearly expressed in words.