Laying standards

Large scale marking of power pipeline laying

Precautions for pipeline construction

Pipeline construction does not require encapsulation measures in the following situations:

1. The pipeline is buried in other safe, stable, and reliable areas such as non motorized vehicle lanes or slow lanes, and the thickness of the soil covering the top of the pipeline is greater than 1750px;

2. The pipeline burial area is unobstructed and located in a non frozen soil zone;

When the soil has a bearing capacity greater than twice its load and the groundwater level is consistently below the foundation, there is no need to take sealing measures;

In areas where the groundwater level is very low, if the bearing capacity of the original soil foundation of the pipe trench exceeds twice the pressure of the pipeline and its upper part, and it is stable soil, pipe holes can be directly laid on the trench bottom after leveling;

There are no other pipelines crossing through the pipeline burial area, or crossing with other pipelines, but the parallel clearance and crossing clearance meet the relevant requirements.

Tips：

The above situation only applies to conventional situations. Due to the wide coverage area of pipeline burial, it needs to be determined according to the actual situation in different geological environments, soil environments, and climate conditions. The burial of pipelines covers a wide area and needs to be determined according to the actual situation in different address environments, soil environments, and climate conditions.

Detailed drawing of underground pipe gallery laying A-A section

describe：

1. Except for the elevation measured in meters, all dimensions in this drawing have been measured in millimeters.

2. This diagram is applicable for communication cables leaving the cabin separately. Please refer to the floor plan design for the specific location of the cabin.

3. As a cable protection tube, the fiber woven, burned, and extruded cable protection tube requires that the technical parameters of the tube comply with the requirements of "Technical Conditions for Conduits for Power Cables Part 2: Glass Fiber Reinforced Plastic Cable Conduits" DL/T802.2-2017.

4. For cases where cables are not installed recently, blind plates need to be used to seal the conduit. For specific methods, please refer to the "Detailed Drawing of Waterproof Conduit".

5.During the design and installation of cables, measures should be taken to ensure that the clear width of the public passage within 2.0 meters above the bottom of the pipe gallery is not less than 0.9m.

6. The roof of the cabin is covered with soil at a depth of 0.7m.

7. H is the net height of the outlet compartment, and the specific value is shown in the longitudinal section design drawing. It is calculated by covering the soil of the standard section pipe gallery corresponding to the pile number of the outlet compartment.

8. The specifications and methods of pre embedded steel plates are detailed in the structural diagram.

9. 10 sets of double-layer 5-row brackets.