They may be found or informed during construction.
The stake points of relevant control points must be firmly set at the obvious position that will not be lost or easily buried.
The drawings shall be disclosed together with Party A, Party B and Party C.
Before running the pipe, carefully check whether the size and elevation of the strip foundation centerline, sideline, well foundation, etc.
Check the well location, well spacing, concrete foundation grades of various parts, and the preparation of interface anti-seepage mortar.
In addition, pipelines sometimes cross urban traffic roads, forest belts and canals, which are all obstacles that can not be ignored, and should be studied and solved together with relevant units before commencement.
The joints that are not tightly plastered with mortar extruded from the interface shall be filled with mortar to make them full and watertight.
It is particularly worth mentioning that at the intersection of the pipeline and the road, we should consult with the competent department and take necessary measures (such as closed road sections or semi closed roads, red lights).
The excavation width at this place shall not be greater than 1 m, so that the pipeline or the hole under it can pass through.
It is strictly prohibited to use humus, garbage, sludge, etc.
For example, sewers, wires, cables, heating ditches, gas pipelines, and civil air defense projects are not easy to find.
Ensure timely, accurate and error free completion.
2、 Before troubleshooting, in addition to ensuring the three-way connection, carefully check the pipeline route, the construction excavation working face, the site occupied by soil and materials, and the terrain, landform, surface features, as well as traffic problems.
However, it can only be used after the closure inspection and measurement are correct and conform to the national standard.
The pipes entering the construction site shall be carefully checked for cracks and holes.
6、 The pipe trench made of strip foundation can be constructed according to the size and mark required in the drawing design and the centerline after the excavation acceptance.
3.
7、 Before the completion of pipe installation and pipe trench excavation, pipes can be transported to the construction site.
If the water flow is large, the pipe diameter and number should be considered.
4.
It is worth mentioning that there must be about 3cm mortar protruding from the joint in the pipe due to extrusion during installation at the junction of the two pipes.
For example, a drainage pipe should be set up in advance along the water flow direction for emergency irrigation without affecting the construction.
To ensure that there is no error in the detected figures after each process is completed.
Pipes above D400 can enable small and thin workers to drill into the pipe.
Special personnel must be assigned to complete this project.
related to the excavation of the working face.
It is necessary to consider that the excavation is limited after the centerline and slope coefficient are widened, and if the excavation surface cannot be narrowed, it is necessary to consider setting supports in the trench to ensure safe construction, so as to avoid accidents caused by landslides.
meet the requirements of the drawings.
Besides, the sundries in the pipe shall be carefully removed, and special attention shall be paid to the fact that no leakage, ponding or backflow water is allowed in the pipe..
The installation of pipe hangers shall be careful not to collide, and it is better to carry out construction pipe hangers when there is no water.
For the problems that are worth paying attention to in advance, the corresponding solutions should be put forward according to the construction period and the contradiction between water use and water supply before the formal commencement of construction.
2.
For this reason, each pipe must be installed with straw bale method to level the extruded protruding mortar.
Therefore, civilized construction should be especially advocated.
We should coordinate with the selection of competent personnel to be on duty day and night to speed up continuous construction, and strive to ensure the quality and timely completion in the shortest and fastest time.
Once buried in the soil and installed by hanging pipes, it will take a lot of work to excavate.
At least the following points shall be achieved: 1.
4、 In pipe trench excavation, attention shall be paid to the scientific rationality of slope making, which is both safe and economical.
in the tamping.
To ensure the success of the closed water test, or carefully repair or replace the pipes, they must be solved immediately.
Special attention shall be paid to no over excavation in the trench.
These are easy to detect.
The over excavated part shall be carefully backfilled and compacted.
First, you must understand the drawings and be familiar with the drawings before starting to work, so as to avoid mistakes in the busy schedule of the kick-off meeting.
Some underground hidden projects and facilities.
5、 The construction survey is a highly technical work that runs through the whole project.
In general, if the construction period is tight, considering the adverse factors such as maintenance, climate, and long-distance transportation of concrete, one mark or early strength agent can be increased to reach a certain strength as soon as possible before the pipe is laid.
If not handled in time, the flow section will be reduced, the flow rate will be affected, and the smooth drainage will be affected, which is very easy to cause debris accumulation and blockage.
For some parts with small excavation surface or poor soil quality due to setting out restrictions, support shall be considered and no carelessness is allowed.
3、 After the visible obstacles on the construction setting out ground are removed, the piling and ash removal setting out can be carried out according to the drawing.
In the process of self inspection and self testing, we require the allowable deviation accuracy to be 50% higher than the specified one.
There is also the environmental health department, which can find out the impact on the environmental road cleaning caused by dumping soil and hauling materials.
Entering the construction site too early will occupy the traffic.
A leveling elevation reference point shall be set every 100 meters or so to establish an accurate leveling elevation control network for the convenience of surveying the pipeline construction.
Carefully and carefully construct in accordance with national regulations and standards, and no mistakes are allowed.
Any factors hindering the construction shall be recorded, reported to the leader in time, and submitted to relevant units or departments for assistance in elimination.
Go to the site to understand the basic overall picture of the project, such as the pipeline length, pipeline route, pipe diameter, number of inspection wells, etc., as well as the terrain, landform, surface features, etc.
A little carelessness may lead to misfortune.
It is strictly prohibited to use low-lying water and ponding.
Because there is a time difference in the terrain data provided before the drawing design, it is inevitable that the terrain changes due to time will affect the project budget cost, which should not be ignored.
The biggest characteristic of urban drainage pipeline construction is that the pipeline is long, the occupied line is long, the construction area is wide, which seriously interferes with and affects the traffic and brings inconvenience to pedestrians.
Here will build your “hive of thought”.
It is better to re measure the leveling according to the pile number and direction determined in the drawing to avoid mistakes.
The quality and water safety should be guaranteed when placing, so that our drainage pipes can be smoothly constructed from below.
