Exploration of civil engineering test and detection?

With the development of society, the number and requirements of future construction projects will be significantly improved, and how to ensure the quality of projects is very important. The accuracy of the test results will directly affect the overall construction quality of the project. This paper mainly expounds the contents of civil engineering test at this stage, aiming at providing reference for future projects.

1 Introduction

For modern civil engineering, whether the project quality meets the standard is the main factor to ensure its safety and stability, and also affects the cost, economic benefits and social benefits of the project. In the whole process of engineering construction, it involves foundation, building materials and construction technology. Whether it is built or under construction, it needs to be tested and inspected. Therefore, this paper analyzes how to improve the level of engineering test detection from the common technical measures.

2 the theoretical content and importance of testing and detection

Usually, the structural test of civil engineering is to calculate and analyze the structural materials, and then apply the results to the subsequent research and construction process. Structural inspection includes many aspects. It is necessary to analyze the structural state and objectively evaluate the working performance through different inspection methods, so as to judge the quality of the internal structure and possible quality hidden dangers. The long construction period and high investment cost of civil engineering itself will inevitably bring serious economic losses, and many construction projects are related to urban development, such as infrastructure construction of municipal engineering, road and bridge engineering, etc. , need long-term use. Therefore, the quality must be guaranteed to meet the requirements of actual use [1]. Only through continuous experiments can we strengthen the theory, optimize and improve the technology at this stage and provide important data for future construction projects. Therefore, the inspection before construction is an important link to effectively judge whether there will be quality problems in construction. Once problems occur, targeted solutions can be taken immediately to reduce the later maintenance cost and control the project cost.

Three common tests of test detection

3. 1 seismic test

Structural seismic test is a common indoor test, similar to pseudo-dynamic test. By applying low cyclic action to the structural members, it is judged whether they will be seriously damaged or displaced due to the earthquake.

3.2 Earthquake simulation test

Under the control of computer, the earthquake simulation test is to create artificial earthquake waves, make the structural model bear the simulated earthquake action, judge whether it will be damaged under the earthquake action, and make reasonable optimization and adjustment of the construction project according to the actual results.

4 case study

A company obtained a new road and bridge project, with a length of 12km, a subgrade width of 12m and a pavement width of 8m, which is a plain third-class highway. The overall structure of the pavement is 15cm lime stabilized soil base, 0.5cm emulsified asphalt lower seal coat and 3cm asphalt macadam. After it was put into use, the subgrade settlement occurred, and the pavement was seriously damaged, accompanied by a large area of cracks and pits. By analyzing the test results, it is found that the design elevation of lime soil layer is unreasonable during construction and the strength of subsequent materials is not enough. At the same time, due to the long-term stacking of materials, the performance is damaged, and the water content control in the subsequent rolling process is unreasonable, resulting in the compaction degree not meeting the actual construction requirements.

4. 1 Quality of testing personnel

The subject of the test is human. As a civil engineering professional and technical personnel, they should have professional knowledge in the construction industry. All kinds of problems in the case are due to the lack of inspection and testing work. Therefore, the technical problems of inspectors should be the focus of future work.

4.2 Lack of examination management system

The material properties and design elevation of lime soil layer are the contents that must be detected in the construction process. However, according to China's current system, many testing institutions do not clearly mark the relevant work details, lack management system and technical support in the operation process, and the division of labor in many tests and experiments is unclear, and managers have deviations in testing data due to various factors.

5 How to improve the level of test and detection?

5. 1 Reasonable planning of construction scheme

There are many test procedures, from the initial raw material sampling and material identification to the design experiment, and then to the later construction guidance and finished product quality inspection, reasonable planning should be carried out [2]. If the test results are unqualified, it is necessary to analyze the reasons and put forward improvement plans, and then conduct guidance and inspection. In this process, we should focus on material quality management, which is an important way to reduce costs and create economic benefits.

5.2 Deployment of construction links

The planning of test and detection links is inseparable from the rational deployment of construction links. The test content includes not only technical aspects, but also material properties. The construction link involves the deployment of water and electricity installation and other aspects. Therefore, the construction unit should do a good job of handover with various departments before starting the test, and make reasonable arrangements for the measurement work in the construction area.

6 conclusion

The construction engineering test plays a decisive role in improving the engineering quality. China has always attached great importance to the test work and issued a series of relevant norms and standards similar to the Technical Management Code for Construction Engineering Test, aiming at improving the test level. As a construction unit, we should attach great importance to the engineering test and inspection, constantly check for leaks and fill gaps, ensure the construction quality from the root, and better serve the future construction of our country.

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