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First, the purpose of the internship:

Through the on-site practical knowledge of Xizhou expressway and Yongxian expressway, we have a comprehensive perceptual knowledge of subgrade treatment, asphalt pavement construction, road design, design and construction of highway bridges and the design and layout of other highway-related facilities, which deepens our understanding of course knowledge and combines learning with application.

Second, the internship time:

XXXX，XXXX，XX，XX

Third, the internship location:

Some construction sites of Xizhou Expressway and Yongxian Expressway.

Xi 'an-Zhashui expressway starts from Qujiang Interchange in the south section of expressway, Xi 'an Ring Road, and ends at Jiuliwan, Zhashui County, with a total length of 64.75438+04 km.

Yongshou-Xianyang-expressway is an important part of Yinchuan-Wuhan-expressway, the national western corridor, in Shaanxi Province. It is also an important part of the main skeleton of Shaanxi highway and one of the typical demonstration projects of national 12 highway. This project is the east extension from Fengxiang intersection under construction to Yongshou expressway, and the completed west extension from Xi to Xianyang expressway, passing through Xi 'an Xianyang International Airport.

Fourth, the internship content:

Subgrade part

Subgrade works of some construction sites in Yongxian expressway mainly include foundation treatment, embankment and bridge and culvert works. 1, subgrade treatment:

This section is located in collapsible loess area, and the treatment method is soil replacement. That is, all the excess soil in the above 80 cm road bed is dug out, and then 50 cm plain soil is backfilled in layers, and sand grains are laid on it. But the disadvantage of this situation is that after sand meets water, water will penetrate into the loess of subgrade and destroy its stability. So the original design was changed, that is, the original 80 cm soil was dug up, the whole section was rolled first, then 40cm plain soil was backfilled, then 40cm 5% lime soil was laid on it, and then blind ditches were designed on both sides.

There are two ways to treat collapsible loess: one is impact rolling, and the other is dynamic compaction. After comparing their functions, all sections are treated by dynamic compaction. The processing method comprises the following steps: firstly, cleaning the table; Then, according to the design requirements, make a square grid to carry out earthwork allocation design; Finally, the tamping function of the machine is determined (120 ton m, 60 ton m).

In addition, the treatment of the structure. Because collapsible loess will have a great influence on the structure, the treatment method is to excavate the foundation pit first, and then use large-tonnage machinery for dynamic compaction to ensure the safety of the structure.

For the treatment of embankment, the rolling method is adopted. The mechanism is that soil is a three-phase body, soil particles are skeletons, and the pores between particles are occupied by water and gas. The purpose of compaction is to recombine soil particles, squeeze each other tightly, reduce pores, increase the bulk density of soil, form a close whole, and finally lead to increased strength and stability.

The method is to crush the original ground first, and determine the degree of compaction by ring knife method; Then the layered fill is rolled and the density is measured by sand filling method. Compaction method: under the condition that the model, soil thickness and driving times have been selected, the compaction operation should be light before heavy, slow before fast, edge before middle (if ultra-high section is needed, it should be low before high). When pressing, the wheel tracks of two adjacent times should overlap by one third of the wheel width to keep uniform compaction and no pressure leakage. For the corners that can't be pressed down, they should be tamped by manpower or small machinery. During the whole compaction process, water content and compactness should be checked frequently to meet the specified compactness requirements.

Earthwork construction procedures are: rough leveling-lofting-drawing gray lines-fine leveling-measuring compactness. The roller adopts sheep's hoof for compaction.

2. Bridges and culverts:

Because expressway has a high grade, the whole line is closed, interchanges, river valleys and many bridges. Our practice mainly includes Xianyang Airport Viaduct and Shuangxinggou Bridge.

The viaduct of Xianyang Airport is 980 meters long, using prestressed composite box girder and cast-in-place beam, with a single beam span of 25 meters. Prestressed steel corner lines are arranged in beams by tensioning technology to reduce deformation and improve bearing capacity.

Shuangxinggou Bridge is a 2×85 m T-type steel structure bridge, and the cantilever casting method of hanging basket is adopted in the upper process. At present, the two piers are about 38 meters, the design height is 5 1.5 meters, and the pile foundation below is 75 meters deep. Box-shaped thin-walled piers are used in the pier body, and the upper part of the pier is 3 meters, which rigidly connects the two piers together to increase the overall effect. Which belongs to mass concrete pouring with heat dissipation design. 3. Pavement part

The practice of pavement mainly focuses on the construction site (asphalt pavement) in expressway, Xizhou. The expressway adopts the construction technology of hot-mixed asphalt mixture pavement by factory mixing method. Its pavement consists of surface layer, base layer and subbase layer. Surface layer: 5cm in the upper layer, 7cm in the middle layer and 10cm in the lower layer. Its materials include modified asphalt, coarse and fine aggregates, etc. The base is lime-fly ash stabilized macadam; The subbase is lime-fly ash stabilized soil.

Hot mix asphalt mixture is suitable for asphalt pavement of various grades of roads. The upper, middle and lower layers of asphalt pavements of expressway, first-class highways, urban expressways and trunk highways shall be paved with asphalt concrete mixture. The material type of hot mix asphalt mixture should be reasonably selected according to the specific situation and technical specifications. It should meet the requirements of durability, rutting resistance, crack resistance, water damage resistance and anti-sliding performance, and also consider the actual situation of construction machinery and project cost.

Factory-mixed asphalt pavement includes asphalt concrete and asphalt macadam. The construction process can be divided into two stages: mixing and transportation of asphalt mixture and on-site paving.

1, mixing and transportation of asphalt mixture

There are two kinds of fixed mixing equipment used to mix the mixture in the factory: intermittent and continuous. The former measures the weight of various materials in the mixture when mixing in each plate, and the latter continuously sends them into the blender for mixing after measuring various materials. The mixing station adopts 3000 batch mixer.

Before mixing asphalt mixture, trial mixing should be carried out according to the determined mixture ratio. All kinds of mineral materials and asphalt used in trial mixing should be strictly measured. Determine the heat of each board through trial mixing and sampling inspection.

Mix proportion and its total weight (intermittent mixer), or the opening size of various mineral aggregate imports and the feeding speed of asphalt and mineral aggregate (continuous mixer), appropriate asphalt dosage, stirring time, heating temperature of mineral aggregate and asphalt, and ex-factory temperature of asphalt mixture. After the trial mixing test of asphalt mixture is qualified, the construction mixture ratio can be selected.

Materials are directly transported by truck to the construction section for paving.

2. Block stone pavement

The paving process is as follows:

(1) Foundation preparation and lofting

Before paving the surface layer, the base and subgrade should be inspected and treated to ensure the good combination of the base and surface layer of the road, thus reducing the infiltration of water into the base layer.

In order to control the paving thickness of the mixture, after preparing the base, measure and set out, set sample piles along the center line of the pavement and a quarter of the width of the pavement, and mark the loose paving thickness of the mixture. When paving with an automatic leveling paver, a control datum line guiding the driving direction and elevation of the paver should also be released. The test section should be paved before the construction of expressway and the first-class highway. The length of the test section should be determined according to the test purpose, and it should be 100 ~ 200m. The test section shall be laid on a straight section. For example, when paving on other roads, the pavement structure and other conditions should be the same, and the tests of each structural layer of the pavement can be arranged on different test sections.

(2) Paving the road

Asphalt mixture can be paved manually or mechanically, and asphalt pavement of high-grade highway should be paved mechanically.

There are two types of asphalt pavers: crawler type and tire type. The structure and technical performance of the two are roughly the same. The main components of asphalt paver are hopper, chain conveyor, spiral paver, vibrating plate, spreading plate, moving parts and engine. (3) Rolling

After paving and leveling the asphalt mixture, it should be rolled while it is hot. The rolling temperature shall meet the specified requirements. Compacted asphalt mixture shall meet the requirements of compactness and smoothness, and the layered compaction thickness of asphalt mixture shall not be greater than 10cm. The rolling process of asphalt mixture is divided into three stages: initial rolling, secondary rolling and final rolling. During initial compaction, a 60 ~ 80kn double-wheel roller is used to roll the mixture twice at the speed of 1.5 ~ 2.0km/h, so that the mixture is initially stabilized. Then use 100 ~ 120 kn three-wheel roller or tire roller to recompress for 4 ~ 6 times. Rolling speed: 3 km/h for three-wheel roller; The tire roller is 5 km/h, and in the recompression stage, it will be rolled until it is stable without obvious wheel tracks. Re-compaction is the most important stage in the rolling process, and whether the mixture can reach the specified density depends entirely on the rolling at this stage. The final compaction is to use a 60 ~ 80kN double-wheel roller with a rolling speed of 3 km/h for 2 ~ 4 times after re-compaction, so as to eliminate the wheel tracks generated in the rolling process and ensure the smoothness of the road surface.

When rolling, the direction of the roller should be parallel to the center line of the road and pressed into the middle of the road by the edge of one side of the road. When rolling with a three-wheel roller, the width of the rear wheel should overlap1/2 each time; Double roller will overlap 30cm once; Tire rollers should also overlap. Because the tire roller can adjust the internal pressure of the tire, it can obtain the required contact ground pressure to make the aggregates bite each other, and it is easy to obtain uniform compactness, and the compactness can be improved by 2 ~ 3%. Therefore, the tire roller is most suitable for rolling in the recompression stage.

(4), joint construction

Various construction joints of asphalt pavement (including longitudinal joints, transverse joints, new and old pavement joints, etc.). Due to insufficient compaction, steps, cracks, looseness and other diseases are often prone to occur, which affects the smoothness and durability of the pavement, so we must attach great importance to it during construction. This section is constructed by half a piece of machinery with an isolation belt in the middle. There are two machines paving at the same time in the construction, so the longitudinal joints between the machines should be handled carefully.

(5), drainage facilities

The whole pavement is arched, so the general pavement adopts overflow on both sides of the slope and flows into the side ditches on both sides of the highway to be discharged; In the curve section of the road, superelevation is set on the outside of the road, and unilateral drainage is adopted. Rainwater pipes are arranged in the central separation zone to collect rainwater from the road surface outside the bend, and then flow into the side ditch from the horizontal drainage pipes laid under the subgrade.

A summary of verb (abbreviation of verb) practice

Through this field road practice, we have a comprehensive perceptual understanding of the design and construction of subgrade and pavement in expressway, further understand and accept the knowledge in class, and apply the theory to practical production. In recent years, China's highway industry, especially expressway, has developed rapidly and the demand is increasing day by day, which is both an opportunity and a challenge for highway workers. As students who are about to leave school, mastering more professional knowledge and strengthening their practice and design ability in a limited time will be more conducive to their future development and make a difference in this field.

Investigation report on on-the-job internship of civil engineering cost engineer;

The two years at school have taught me a lot, and it is precisely because of these busy two years that I learned how to use time and cherish it, and also exercised my independent and capable work style.

Guangsha is different from other schools in military management and strict hospital management. At one time, I couldn't figure it out. All this was completely understood by me in my internship. Since I started my internship, my boss has stipulated that I go to work at 9 o'clock, arrive at my post at 8 o'clock, start work at 4 o'clock and leave the company at 5 o'clock. These don't mean how diligent I am. In fact, the boss is in the eye.

The competition and pressure faced by society are self-evident. When I was at school, I would hear such words: "It's no use studying at school, but learning everything when you go out …". This sentence is a bad check, and it can't be done well now, let alone what will happen in the future. The theoretical basis of school science is very important. Knowing how to read pictures when making a budget is the premise of doing a project. This is what we learned at school: drawing and reading pictures. The courses arranged by the school are actually very suitable for us, such as the basic knowledge of freshmen, the professional knowledge of sophomores, and the application of some software, such as software reinforcement and civil engineering in Luban. Actually, this is very good. Like what I am doing now, some urgent work needs to be calculated by software. As far as I am concerned, the calculation of steel bars is very unskilled. Now I must study hard! Hurry up and learn!

I always thought that the outside world was so wonderful and free, but in the past six months, I have tasted everything. The first month of internship, just out of campus, very young. Students majoring in engineering cost are engaged in clerical work, printing manuscripts, copying documents, sending materials ... whatever they want. In my spare time, I recite my quota and look at the cost information on the cost network. During this month, I found myself with so many shortcomings that I couldn't even figure out the layout of the simplest manuscript at first. It was also in this month's adaptation period that I grew up a lot and became mature.

Now I can do some small projects, some with other budget staff, some independently. During this period, I am also learning the knowledge of bidding. Two slope projects in Evolutionary Town, Xiaoshan are inviting tenders, and I will also participate in the bid opening, and I will follow the master to see the site, which is very rewarding. As we all know, the certificate of people who are engaged in cost specialty is very important. For example, I don't have a cost certificate yet, and my name can't be written on the project visa form I made, nor can it be the seal for me to complete a project. The cost will be tested in June next year, and I will definitely work hard.

I am an intern of Yongjia Haitian Certified Public Accountants, and my work is auditing and capital verification. On the first day of work, because I was unfamiliar with the work of accounting firms, the master first asked me to start with simple voucher verification and gradually understand the audit process. A week later, my master and I went to the enterprise. When we arrived at the enterprise, teachers and customers made proper communication, and we started intense work. Through my internship in an accounting firm, I learned a lot before graduation, and many things that are not in textbooks but must be possessed after work. Understand the main responsibilities and organizational structure of the firm, learn some necessary transaction processing capabilities of the firm, understand the recent accounting policies and regulations, gradually become familiar with the audit business process and key steps, and realize the importance of external audit responsibilities as an accounting firm.

As an intern, I will talk about all aspects of the school management system. Many students will have ideas about teachers coming to class to inspect discipline. After working in the unit, you will find that leaders will become patrol "teachers" at any time, and they often come to our office when they have something to do. Moreover, don't think that the theory learned in school is not important. Imagine that we don't even understand the basic accounting entries. How can I check other people's accounts and answer some questions that others don't understand? We can't say I always ask the teacher first. So I'll give you some advice. I hope you can really master professional knowledge during your school days, so that you can get started faster than those who don't understand, and you will always have an advantage when competing with others.

Finally, I want to talk about my experience after my internship! After bidding farewell to campus life and stepping into a complicated and colorful social family, I deeply realized how happy campus life is. Finance and auditing are tedious jobs. Faced with so many boring accounts and figures, people often feel bored and bored, so that there are many mistakes and omissions, and the more mistakes, the more annoying they are. You must adjust your mentality, as long as you do it with your heart, you will make ends meet. The more you do it, the more fun you feel, and the harder you do it. First of all, I would like to thank my alma mater for training me, and I also wish my brothers and sisters a happy study and progress every day.

I started my internship in Taizhou Jiuding Brokerage Co., Ltd. in June 2009. I remember when I first came to the company to apply for a job, I was under great pressure. At that time, all the students who signed up with me were undergraduates, and I was admitted, mainly benefiting from the education and training mode of combining work with study in the school. During the interview, the boss will ask you many practical questions. As an intern who just stepped out of school, how can he answer them without any work experience? But because of the school's education and training mode of combining work with study, I can cope with it calmly.

At first, I mainly studied with other colleagues and became familiar with the operation of the company. Then I gradually integrated into the company. Sometimes the company's business is busy, and I chat with customers late at night, and I have to go back to the company to talk with my boss about how to do the work plan. Although our company has a clear division of labor, it has high requirements for new employees. The boss requires every employee to understand the whole operation process, so up to now, I have to personally complete every business from the initial customer reception, customer tracking, negotiation and contract signing between the two parties, to the final transfer procedures, bank loans and property handover. We should grasp the details, especially when signing the contract, we should pay attention to the words and clear meanings. At work, if you don't understand something, ask the company's seniors. With the help of leading colleagues, my business ability has been greatly improved.

The strict management system of the school has formed good habits for me. Now I want to thank the school. She made me praised by my boss in the company. I have never been late since my first day at work. The boss looks at your work performance, not only your performance, but also your attendance. In our work, we often have appointments with clients. In the eyes of customers, it is right to arrive early. If you are late, it is disrespectful to your customers and affects their image of your company, because you are not only an individual, but also a representative of the company.

Although the internship time of several months is not long, I have learned more about being a man, doing things and learning from them. I sincerely thank the school and teachers for their training, and I wish all my brothers and sisters success in their studies!

I am honored to talk about my internship with all my teachers and classmates. I have experienced a lot since I left school, and I have accumulated a lot when I found a job.

The internship opportunity of Tiandu Branch of Guangsha Property Management Co., Ltd. was found at the job fair, and it was not ideal for the company environment, because there are many types, including single apartments, multi-storey, high-rise and townhouses, as well as five-star hotels, Tiandu Park, supermarkets, banks, community health service rooms and intermediary companies. Later, I realized that it was necessary to build a satellite city with a population of about 654.38 million.

After a week of training, I came into contact with single apartment for the first time, and began to gradually understand customer service, cleaning, security, greening and so on. At first, I didn't know what to do. Go to the company to clean and boil water every day, then listen, watch and learn. If I don't understand, I'll ask. Colleagues are very enthusiastic. They teach me enthusiastically, take me out for inspection, tell me the situation of the community, let me adapt to the environment as soon as possible, and let me gradually move towards an independent track. After two months of study, I was lucky enough to be assigned to a high-rise building and a new community, and I am going to hand over the house twice at the end of September and the beginning of 10. From preparation to delivery, we work in a simple room on the construction site. The conditions are bitter, the temperature is high, the noise is loud and the air is turbid. A month later, I successfully delivered the house twice. During this period, I studied the property-related information (handover information, house inspection information, decoration information), the handling of small owners' handover procedures (key handover, fees, document signing), the arrangement of small owners' house inspection reports and so on. Everything we do is to provide more satisfactory service to the owners. Many details, though tedious, must be done. The follow-up work of house delivery has also been going on for more than two months, and the housing quality rectification has basically entered the stage of summary, statistics and feedback. During this period, there are also very important decoration management and customer service management. Although some owners do not cooperate, on the whole, all this is quite smooth, and now it has embarked on a certain track of standardization and normalization. As a property manager, I realized that there was always something waiting for me to learn. There are hundreds of owners and things are ever-changing. To master everything of each master, you need to master a wide range of knowledge, learn to be a man and learn to do things. I should gradually strengthen my interpersonal skills and flexibility.

For the management of the college, students should first adjust their mentality. Although the management system of the college is strict, it has practical effects. It allows us to form the habit of getting up early healthily, enhance our self-discipline and pay attention to hygiene and cleanliness. Although it is very detailed, it reflects a person's quality well.