There is a certain process for grooving and burying of cement pipes. According to a reasonable process, the burying process can be simplified and convenient. Therefore, the editor of Henan Sitong Plant specially introduced the process of grooving and burying of cement pipelines. The general requirements for grooving and burying of cement pipelines are through leveling, laying, foundation trench excavation, pipe trench foundation cushion, pipeline seating and pipe trenches. Backfill several processes.
The method of leveling and laying out lines for cement pipeline projects is basically the same as the method of leveling and laying out lines in housing plants. First of all, according to the planning requirements and detailed azimuth perspectives, the planning requirements are displayed on the ground. However, there are also differences between the two. Pipeline engineering is more difficult to level and line:
1) The influence of geographical environment; according to the results of starting the line, the place should be leveled and leveled first. At the factory
When the object is put on the line, because its plane is relatively small and it has passed the flatness of the place, the geographical environment such as the slope of the place has little effect on the results of the line. When laying the pipeline axis, the length of the pipeline is too long to uniformly level the entire construction plane. When measuring, the geographical environment, such as the above-ground slope, has a greater impact on the results of the laying, and it needs to be revised according to the detailed situation.
2) Closing of the pay-off; when the factory is put on the line, you can start from one corner of the factory and operate it one by one on the periphery
The placement of the axis line can always return to the starting angle, thus forming a closed multilateral line; by looking at the starting point
Whether it coincides with the end can quickly check whether the delivery of the factory goods is correct, so the factory goods are relatively intuitive. The pipeline project is started from the starting point A. According to the azimuth and length
A control axis length and azimuth point of the pay-off. Reached the end of the pipeline B; the pay-off end B of the pipeline may be far from the starting point A, it is difficult to find errors and overrun errors in the pay-in process in a timely manner, to check the pay-off results It is very difficult, so the pipeline engineering laying operation is more difficult and less intuitive.
3) Accumulation of errors; the length of each axis of the plant is generally shorter, the shape is more regular, and the measurement distance
The distance and viewpoint are very convenient, so the measurement speed is relatively fast. Generally, each section of the pipeline is relatively long in pipeline engineering, and the interval and viewpoint
Measurement is a problem that must be paid attention to, because irregular measurement simply constitutes a larger error and this error has not been easily discovered. Reduce the pipeline engineering axis laying errors, and more choices: accurately confirm the coordinates of the start and end of the pipeline, calculate the coordinates of each control point, and check the method of rechecking when putting out the line; if the interval between the two points of the pipeline is short, You can use the theodolite and rangefinder to pay the line. If the distance between the pipeline segments is relatively long, you should generally use the GPS positioning measurement method to accurately confirm the detailed position of each control point. If necessary, a few more points can be set on the axis as the control points for measuring and putting out the line. This shows the importance of measuring and putting out the line, so the process must be taken seriously.