Summary of engineering survey practice

Summary of engineering survey practice: 5 articles.

Summary refers to analyzing the experience or situation in a certain stage of work, study or thought, making written materials with regular conclusions, and giving us guidance in the next stage of study and work life. So, let's write a summary. So do you know how to write a summary? The following is a five-point summary of my carefully arranged engineering survey practice, hoping to help everyone.

Engineering Survey Practice Summary 1 Practice Steps

1。 Deployment:

(1) leveling principle:

Leveling is to directly measure the height difference between two points on the ground by using the horizontal line of sight provided by the level, and then calculate the elevation of the unknown point according to the known point elevation and the measured height difference.

Let the leveling direction be from A to B, where A is called the back viewpoint and A is the back reading; B is called forward view, and B is called forward reading. If the elevation HA of point A is known, the elevation of point B is: HB = ha+habha+a = HB+BHA = HB+A-B.

The elevation of point B can also be calculated by the line-of-sight elevation Hi of this elevation, that is, hi = ha+a HB = hi-b.

(2) Site leveling measurement:

1) Benchmark: the point of leveling elevation. 2) When the leveling point of the predicted elevation is far away from the known leveling point or the height difference is too large, it is impossible to measure the height difference by placing the instrument 9 between two points. At this time, it is necessary to set up multiple stations for composite leveling. The sum of the height difference of each station can get the height difference between the predicted leveling point and the known leveling point, so as to get its elevation. 3) Leveling inspection

Calculation check: the sum of closed conductor height difference is equal to the sum of height difference at the turning point, which is equal to the sum of backward reading MINUS the sum of forward reading, so this formula can be used to check the correctness of calculation.

Station inspection: check each reading of each station and check by changing instruments. The method of changing the instrument requires that the changed height should be greater than 10cm, and the difference between the two heights should not exceed the specified allowable value, that is, 6 mm

Results detection of closed leveling route: In theory, the sum of the height differences of each measuring section should be equal to zero, but in practice it will not. There is a height difference closure difference, which should not be greater than your allowable value, that is, if the height difference closure difference exceeds this range, it means that there is an error in the result and you have to return to work.

Broken step measurement: (1) Selection of broken step point.

Fault step points are the characteristics of ground features and landforms. For ground objects, the step-breaking point should be selected at the direction change of the contour line of ground objects, and the shape of ground objects similar to the site can be obtained by connecting these feature points. For geomorphology, the fault step point should be selected on the geological line that best reflects the geomorphological characteristics, such as ridge line and valley line.

(2) Theodolite mapping method

During observation, the theodolite is placed on the station and the drawing board is placed next to the station. Use theodolite to measure the included angle between the direction of the step breaking point and the known direction, the distance from the station to the step breaking point and the elevation of the step breaking point. Then, according to these data and the proportional position of the fault step point, draw it on the map, mark its elevation on the right side of the point, and then draw the terrain against the field. The operation steps are as follows:

1) Place the instrument. Put the instrument into the measuring station, measure the vertical plate index difference, measure the instrument height I, and fill in the manual.

2) orientation. Find a control point as the zero direction and set the reading of the horizontal dial to zero.

3) Ruler. The ruler will set the ruler on the feature points of ground objects and landforms in turn.

4) observation. Turn the sighting part, aim at the scale of 1 point, and read the horizontal dial; Reading the upper and lower wires and calculating the formula spacing; Read the medium wire reading and the vertical plate reading again.

5) record. Fill in the measured readings in the notebook in turn.

6) calculation. According to the formula of sight distance measurement, the horizontal distance, height difference and elevation of the broken step point are calculated with a calculator.

7) Show the steps of crushing.

Summary of internship experience:

The two-week investigation internship is finally over. Although everyone felt very tired at first, we were all happy to see our harvest. I feel that I have learned a lot. Have the opportunity to comprehensively apply the previous fragmentary measurement knowledge. I have a good understanding of the overall concepts of control surveying and topographic mapping, learned to use surveying instruments and tools such as level and theodolite more skillfully, and have a certain basic knowledge of total station, consolidating theoretical teaching knowledge and improving practical operation skills.

The measurement knowledge originally explained by the teacher in class has also been applied in practice and played an important role. Through mutual comparison, my measurement knowledge and level have been improved a lot. Now it is necessary to think about this painful internship.

At the same time, in this internship, I once again realized the importance of internship team spirit: one carelessness of everyone may directly affect the progress of the project and even bring irreparable losses for a lifetime. It is far from enough for a measurement practice to be completely completed. Only the cooperation and unity of the group can make the exercise complete quickly and efficiently.

This investigation practice has cultivated our team's ability of division of labor and cooperation, and enhanced the feelings between students. Although sometimes we will argue with you because of our own ideas in some internships, everyone wants to complete this internship more perfectly.

In this internship, we have a deeper understanding of the previous study: we encountered many problems in completing this first task. For example, when leaving school, the main problem is that the passing vehicles and people directly affect the normal progress of our survey, but most of the time we are in class, and everyone is still very careful to complete the detailed engineering survey. When checking the measurement data, the errors found should be solved immediately, and the readings should be reworked immediately. At the same time, we also found that the third survey generally reflects the measurement calculation process and results on the specified record form, and there are calculation checks in the form, and ∑a-∑b=∑h, which only shows that the calculation is correct and cannot reflect the quality of the measurement results. After the field work, calculate the closing difference of height difference, and adjust it within the allowable tolerance range, that is, according to the length of horizontal route or the number of stations. If the tolerance is exceeded, it must be re-measured. Only until qualified. Angle measurement. In angle measurement, the requirements for our professional students are very high.

, using J-2 instrument. This requires us to always adhere to the rigorous style of doing things and not be careless about every detail. At each intermittent point, if the inspection exceeds the limit, immediately rework and retest. In practice, in order to avoid big mistakes, we also summed up a lot of experience. For example, we can eliminate the eccentricity error of the sighting part by taking the average value of the left and right observation of the disk, and the residual error that the sighting axis is not perpendicular to the horizontal axis and the horizontal axis is not perpendicular to the vertical axis. However, this method cannot eliminate the vertical axis tilt error. This method can eliminate the influence of exponential difference when observing vertical angle.

Another example is to pay special attention to the center when observing the angle at the end of the short side, and aim at the bottom of the target as much as possible when aiming at the target, because their influence on angle measurement is proportional to the distance. In order to eliminate the marking error of the dial, it is necessary to configure the position of the dial and configure it every time it is back-measured. The main problems we encounter in angle measurement are the sinking of instruments and the influence of pedestrians on the roadside.

In this internship, I deeply realized that through this practical surveying internship, I learned a lot of real things, such as being more proficient in the operation of experimental instruments and learning things that I can't learn in class, such as the measurement of broken parts, traverse, topographic map drawing and bridge control network. , greatly improved my hands-on and brain skills, but also expanded my ability to communicate and cooperate with my classmates.

Summary of engineering survey practice 2 I. Practice purpose:

1. Master the observation, recording and calculation methods of horizontal angle observation.

2. Understand the accuracy requirements and retest principles of direction observation method.

3. According to the survey area and control points, conduct reasonable point selection and wire layout.

4. Master the inspection method and process of field measurement data.

5. Master the calculation steps and methods of indoor achievements.

6. Be familiar with the quality analysis and processing methods of measurement results.

7. Through field teaching and field survey practice, we can deepen and consolidate the theoretical knowledge of surveying, which is a comprehensive application of combining theoretical knowledge with practical skills.

8. Through small-scale control survey, topographic survey and engineering survey, improve interns' thinking ability and hands-on ability, and give interns comprehensive training in instrument operation, field survey, achievement calculation, chart drawing and other skills.

9. Through practice, students can integrate theory with practice, analyze and solve problems; It is also an excellent opportunity to exercise social activities, organizational skills, team spirit and code of conduct.

Second, the internship plan:

1, horizontal angle measurement 2, closed traverse measurement

During the five-day engineering survey practice, we will complete the survey of closed traverse in the field, including the field survey and indoor calculation of traverse. The field work is mainly to survey and select points, set up standards, measure edges and angles; Indoor work is mainly data sorting, coordinate calculation and exhibition point drawing.

Third, the internship arrangement:

July morning 10: ① Practice mobilization ② Class hours: Closed traverse survey 1F-2 12.

1 1 afternoon: ① distribution of instruments and spare parts for practice; ② Preview the leveling of the instrument; ③ Preview the alignment of the instrument; ④ Preview the instrument angle measurement; Science museum 90 1.

1 1 afternoon: ① reconnaissance; ② Selection of points; ③ Burying of marks; ④ Edge measurement; ⑤ Field closed traverse measurement; 12 am: 1F-2 12 group closed traverse calculation.

12 afternoon: class: conductor exhibition points and drawings 1F-2 12.

In the morning of 13, in the group of 1F-2 12, traverse points and map sheets were drawn.

13 in the afternoon: ① submit the result map; (2) submit the original data of field investigation; ③ Submit unqualified drawing tools to Geological Science Museum 90 1.

14 in the morning: hand over the internship spare parts of instruments and drawing tools to the local science museum at 90 1.

14 pm: local science museum that handed in internship diary and internship report 90 1.

Fourth, the internship requirements:

1. Practice is carried out in class, and the monitor and team leader should be serious and responsible. It is not allowed to be late and leave early, absent from school for no reason, and absent for half a day without internship results. The leading teacher will call the roll at any time to conduct spot checks.

2. Pay attention to personal and instrument safety in field measurement practice. Slippers and skirts are not allowed.

3. In case of special circumstances or weather reasons, the internship will be postponed or notified separately.

The task must be completed on the same day, and the consequences of delay are at your own risk.

5. The internship summary report is written according to the unified format of the school and downloaded from the college website.

6. geological museum 90 1 Investigation Laboratory Tel: 65046 14.

7. The monitor of each class went to the printing house to buy an internship log, one for each. (Hand in after the internship)

Verb (abbreviation of verb) Practice content:

Traverse survey practice includes traverse field survey and indoor calculation. The field work is mainly to survey and select points, set up standards, measure edges and angles; Field work mainly includes data sorting, coordinate calculation and exhibition point drawing.

There are three types of conductor layout, namely closed conductor, attached conductor and branch conductor.

This practice requires that a pentagonal closed conductor be laid in groups in a 400m area, and the total length of the conductor should be about 600 meters.

1, horizontal angle measurement

Practice theodolite horizontal angle measurement in outer space of geological museum, preview instrument leveling, instrument centering and instrument angle measurement, and measure the left and right sides of the panel to prepare for closed traverse measurement.

2, closed traverse measurement

Carry out closed traverse survey in the open space in front of the warehouse, complete field observation, check the observation results, draw a calculation sketch, copy the known data of control points, and calculate the calculation methods of transverse closure difference, horizontal distance of back measurement and coordinate increment of closed traverse respectively.

Six, internship steps:

A, horizontal angle measurement:

1. Place the theodolite at point O, and choose a direction as the initial zero direction, such as direction A..2. Align the left position of the dial with the target in direction A, turn the reversing handwheel of the horizontal dial, set the reading of the horizontal dial in direction A at around 00 02, then turn the sighting department clockwise for 2 weeks, re-align the direction A, read the reading of the horizontal dial, and record the reading value in the table. 3. Rotate the aiming part clockwise, aim at the target in direction B accurately, read the readings of the horizontal dial, and record the readings in the table to complete the upper cycle. 4. Turn the sighting part counterclockwise at the right side of the dial to aim at the direction B, read the reading of the horizontal dial, and record the reading in the table. 5. Turn the sighting part counterclockwise to the sighting direction A, read the readings of the horizontal dial, and record the readings in the table, thus completing the measurement of the second half, and the measurement of the upper and lower half is called the horizontal angle measurement.

Second, the closed traverse measurement:

Find the control point, start from any point and move in the same direction, and determine the layout scheme of the network according to the measurement range and mapping requirements. Mark a point as soon as it is selected. If it is on hard ground such as cement, it can be marked with tape "cross". Mark the position of the traverse point with tape on the fixed ground object next to the point and write it down. In the measurement of conductor rotation angle, conductor rotation angle is a horizontal angle composed of adjacent sides. Generally, the left angle of the calculation direction of the traverse is measured, and most of the closed traverse measures the inner angle. The centering error shall not exceed 3mm, and the difference between the upper and lower back angles of the horizontal angle shall not exceed 30 ",otherwise it shall be re-measured. The lead angle closing difference shall not exceed 24 ".

A, reconnaissance, site selection and burial standards

Precautions:

A. Carry five iron piles, 1 hammer, measuring rod, notebook and pencil.

B. Intervisibility should be made between adjacent points, with the side length of110-120m; Traverse points should be located in places with wide field of vision and large control radius. At the same time, we should also consider the convenience of selecting points.

Summary of Engineering Survey Practice 3 In the first week of this semester, the college organized us to conduct a one-week engineering survey practice as usual. Last semester, we have learned a lot of theoretical knowledge of surveying, and we have done several internships between classes, but the constraints of conditions have not made us fully understand what we have learned. The purpose of this internship is to verify the classroom theory, consolidate and deepen the important links of the knowledge learned in the classroom, and the most important thing is to cultivate students' practical ability and rigorous practical scientific attitude and work style.

Through this practice, we have mastered the use technology of level and theodolite, the general method of steel rule distance, the principle of network layout of civil construction control network, the method of elevation control measurement and leveling, the measurement procedure and coordinate calculation method of traverse network, and the procedure of mapping large-scale topographic map, which provides basic training for us to comprehensively use measurement methods to solve engineering problems in practice.

Summary of Engineering Surveying Practice Chapter IV Civil Engineering Surveying, as a basic skill of this major, is a skill that we must master when studying civil engineering majors. After the freshman study, we organized a 10-day civil engineering survey practice in the school.

"How is this internship more difficult than military training?" A few days later, when we got used to the life of getting up at 5 a.m. and going out to measure with measuring instruments, we never heard any complaints before. In order to ensure the accuracy and progress of the measurement, we always get up at dawn and take the "guy" to the measurement site at the junction of the main one, the main two and the public one to start work! When other students of the college go to the teaching building internship week at eight o'clock, that is, when we get off work in the morning. Going back to the dormitory in the morning, I can't be at leisure, and the original blank data tables are waiting for us to calculate and check. If the data meets the requirements, if the angle closure on the first day exceeds the tolerance measured by our group, we must get up better the next day and re-measure the work that originally belonged to the first day. After a short supplementary sleep in the afternoon, when students from other majors finished class in the afternoon and were ready to enjoy a sumptuous dinner, we carried our equipment again and went out to work again before the sun went down. In the evening of summer, the sun sets, and when it gets dark, it's already past 7 o'clock in the evening. Put the instrument back, and there will be no more food in the school canteen. Walking out of the school gate, I went to the store and looked up. It was simply a scene of class gathering. Everyone wolfed down in the shop. At first, we thought we could relax at night, but this is not the case. We still need to sum up the whole day's work and make a good work plan for the next day to improve the efficiency of the group work and ensure the completion of the progress.

Many problems can always be found in practice, and they also exist in this measurement practice. First of all, I think the biggest problem lies in our use of instruments. The knowledge about the use of instruments in textbooks is abstract. When it comes to real practice, we have not been able to apply book knowledge to practice well, and we need teachers' guidance again. Secondly, in the process of field measurement, we completed the measurement efficiently. When we measured on the first day, the difference between the angle closure difference and the allowable value was more than 3 times. The emergence of this problem shows that our ability needs to be improved. We ignore the key points of alignment, don't try our best to aim at the center point, and aim at the center pole directly for convenience. At the same time, we don't pay attention to the influence of weather on measurement. The discovery of these problems also shows that our experience is still very lacking. Finally, when drawing, we are very unfamiliar with the drawing of strange topographic maps, and we have not applied some skills and methods in civil engineering drawing to topographic maps well. This also requires teachers to give us more guidance in future teaching and promote the improvement of our level.

Let's talk about the experience of this internship. Through this measurement practice, I think the biggest gain is to combine the abstract knowledge in books with the actual measurement. It is no longer simply reading the words in the book, but I can't really understand the operation in the future practice. With the use of measuring instruments and the development of field measurement practice, we have more intuitive contact with the subject of civil engineering measurement, which has laid a solid foundation for us to use instruments and control the distribution of measurement better and faster after we take up our jobs in the future. It also makes us understand that the practical characteristics of civil engineering specialty trigger us to study professional knowledge harder in the future, strengthen the methods of combining theory with practice, and improve our professional level in essence.

In a word, 10-day civil engineering survey practice has gained a lot. It is not only my familiarity with professional learning and instruments, but also the cultivation of my rigor and teamwork spirit. "There is still a long way to go in Xiu Yuan, and I will search for it." I will continue to work hard on the road of knowledge in the future and strive to be a qualified civil worker!

Summary of Engineering Survey Practice 5 At the beginning of the practice week, our group discussed and assigned the projects that each team member was mainly responsible for. My assignment was to record data. Recording data is insignificant, but as long as I remember it wrong, all calculations will fail in the future, so I will be especially vigilant and careful at the beginning of my work, and I will check with my classmates before recording every time to avoid mistakes. Fortunately, I didn't make any mistakes as a recorder except for the inevitable mistakes in the data recorded for a whole week.

Although each of us has our own projects to be responsible for, we will help each other in some emergencies, which not only improves the efficiency of measurement, but also allows us to have a certain understanding of each project during the measurement process.

I. Overview of work

This measurement has two main tasks:

1. Complete the survey of a traverse in the designated area (including traverse leveling, distance measurement and horizontal angle measurement);

Second, the topographic map of the designated area should be drawn according to the scale of 1: 500.

For the first task, according to the actual situation of our assigned geographical location, we chose a closed route with a certain length and a certain height difference as the investigation route. The next step is to determine the unknown points according to the known points. The determination of unknown points is very important. The quality of each point determines the speed of measurement. After everything is ready, we choose a known leveling point as the starting point of elevation. 1 people use leveling instruments and theodolite to observe the elevation and horizontal angle of leveling lines (also wires) (leveling of experimental instruments has a great influence on the error of experimental data; Leveling and horizontal angle measurement need to check the closing error, and if it exceeds the error limit, it must be re-measured), 1 person records, 2 people set the ruler, and 2 people measure the distance between traverse points with a tape measure.

The main instruments used to locate the corners of buildings are theodolite and tape measure. Theodolite is located at four known stations, and all points of buildings that can be positioned horizontally should be measured. Some points that can be accurately located are measured with a tape measure and then located. Sketch when measuring, record all the measured points, and accurately draw the exact position of each point on the polyester film. It can be said that the whole process is complicated and troublesome, because the errors of many points are inevitable, which also leads to a little deviation between some building points on the map, but we are not discouraged. We re-tested the wrong point and finally solved the problem of these deviations. After several days of continuous measurement, the architectural sketch of the area has been released, and the next step is to modify and deepen the sketch. Although I am not in charge of this piece, I have done some understanding, such as solid lines for roads, solid lines for paths, and corresponding symbols such as lawns and street lamps. After the completion of the whole picture, it also announced the successful end of this internship task.

Second, harvest

Through the actual survey practice, our personal practical ability has been improved qualitatively, and at the same time, we have a more thorough understanding of the knowledge in the textbook, which has enabled me to learn a lot of real things, such as operating experimental instruments more skillfully, learning topographic map drawing, using theodolite, level and other things that can't be done in class, greatly improving the ability of hands-on, brains and drawing, and expanding the ability of communication and cooperation with classmates. It is not enough to complete a measurement practice only by one person's strength and conception. Only the cooperation and unity of the group can make the exercise complete quickly and efficiently.

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