Author: Site Editor Publish Time: 2020-12-28 Origin: Site
In daily life, sidewalks usually install gully grating to meet the needs of pavement drainage on rainy days. However, after a period of time, dust, fallen leaves and some man-made garbage on the road will enter the sewer or channel through the drain of the gutter cover. Many garbage will affect sewage treatment and even cause water pollution. Over time, it will not last for a long time. The cleaned trench will be blocked, which will make it impossible to drain on rainy days, resulting in water in the road area; the size of the drainage port of the gutter cover is often easy to become a habitat for rats and other pests, causing rodent infestation and other problems. At the same time, the commonly used ditch cover is non-slip and easy to slip when stepped on it on rainy days.
Storm water drain grate is very widely used in our modern life. In rainy weather, prevent the accumulation of water on the road.
Storm water drain grate is a necessity in our lives now, and it can play a good drainage role on many highways and urban roads. In order to ensure the normal use of the manhole cover, great attention should be paid to the installation quality, so that the size is appropriate, easy to open, safe, firm and non-slip, clean, and beautiful in appearance.
Before installation, determine the elevation of the drainage ditch installation. The size of the base trench and the size of the reinforced concrete members on both sides of the drainage ditch directly affect the bearing capacity. Take the center of the drainage ditch as the standard, determine the width center point of the base trench, and then mark Excavation.
The specific reserved space size should be determined in accordance with the design load-bearing requirements of the drainage system and the concrete grade. Refer to the following table.
| Drainage ditch bearing grade | Concrete grade | Foundation (H) mm | Left wing (S)mm | Right wing (S) mm |
| A15 | C12/C15 | 100 | 100 | 100 |
| A15 | C25/C30 | 80 | 80 | 80 |
| B125 | C25/C30 | 100 | 100 | 100 |
| C250 | C25/C30 | 150 | 150 | 150 |
| D400 | C25/C30 | 300 | 300 | 300 |
| E600 | C25/C30 | 250 | 250 | 250 |
| F900 | C25/C30 | 250-300 | 250-300 | 250-300 |
Pour concrete to the bottom according to the load-bearing grade in the above table, and special design requirements are required. Such as the trench body with load-bearing requirements of E600-F900. The foundation is required to place an 8mm steel grid structure (15X15cm) for reinforcement. Use cement concrete to pour the base of the base trough that meets the requirements of the bearing class. The bottom of the foundation trench should be made into a small diversion slope according to the design requirements. The diversion slope is from high to low, pointing to the drainage outlet of the system (such as the entrance of the municipal drainage system).
The technicians determine the baseline of the line-out ditch according to the plan and instructions and perform on-site measurements to ensure that the size of the drainage ditch cover matches the site size.
Determine the centerline, pull the line to mark the installation. Because the concrete poured at the bottom of the base tank has solidified, you need to prepare some concrete with good dry humidity and put it into the bottom of the drainage ditch so that the bottom of the ditch body and the concrete on the ground can be seamlessly connected. And then After cleaning the mother and daughter grooves on the drainage ditch body, they are connected, and the joints of the mother and daughter grooves are coated with structural glue to prevent leakage.
Choose a trench cover with anti-skid lines on the surface to prevent pedestrians from slipping when passing the trench cover.
The inner diameter of the selected manhole cover must be greater than or equal to the reserved wellhead size, otherwise, the bearing capacity will be greatly affected.
Before installing the rain gutter cover, the cement foundation must be placed, and then the rain gutter cover is installed.
The size and model of the ditch cover plate must be selected according to the width of the ditch well, which is the load required by the cable, to avoid accidental exposure. Don't make mistakes about the force-bearing side of the trench cover when selecting, and the force-bearing sides should be placed on the trench.
According to the thickness of the rainwater grate and the requirement that the top surface of the rainwater grate is 3cm lower than the road surface around the designed gutter, the elevation of the brickwork top surface of the gutter is determined.
During installation, the joint surface of the good seat and the concrete ground must be close, and there must be no hanging places, otherwise, it will be crushed by the roller during construction and installation and the service life will be affected.
When installing a manhole cover on asphalt pavement, you must pay attention to avoiding the construction machinery from directly crushing the frame. When constructing on the pavement, a hole slightly larger than the frame should be reserved on the pavement and placed after the asphalt paving.
When the waterway is too long, install a collection well in the middle section to directly connect with the municipal drainage pipe.
Install a collection well every 10-20 meters, and install an openable inspection hole on the collection well, which can be opened and dredged when the drain is blocked.
The collection well is transported to the side of the drainage ditch, and it is best to be stacked at a fixed point, which is convenient for installation and not easy to lose. After the completion of the drainage ditch, the construction personnel who installed the drainage ditch cover shall inspect it. The location where the ditch cover needs to be installed is cleaned quietly and smoothly, ensuring the installation conditions, and ensuring that the installation of the drainage cover is balanced in force and does not slide smoothly.
Dirt blue can be placed in the collection well, and the basket can be lifted to clean up the garbage at a fixed time to keep the ditch clean.
Before installing the cover plate, the garbage in the drainage ditch must be cleaned up. In order to prevent the ditch body from being squeezed on the wall side after concrete pouring, the ditch cover plate should be put on to support the ditch body. Prevent the cover plate from being unable to install or affect the appearance after being squeezed.
When pouring the concrete on both sides, first protect the cover to prevent cement residue from blocking the water hole of the cover or falling into the finished drainage ditch. According to the bearing capacity, steel meshes can be placed on both sides and poured into the concrete to ensure its strength , It cannot exceed the height set earlier during pouring.
Whether it is necessary to shop depends on the environment we use. If I need to pay attention to the paving stone is slightly higher than the drainage port 2-3mm, there must be enough thickness of cement mortar under the paving surface to prevent loosening, and the paving stone should be neat and close to the drainage port. In order to ensure the overall quality and beauty.
After the drainage system is installed, the drainage ditch cover and inspection well cover must be removed first, and the debris in the drainage and inspection well must be carefully cleaned. After confirming that the groove body is unobstructed, put back the cover and fasten it with screws. Use special bolts to connect and fix the drainage ditch body, and the drainage system can be put into use after everything is normal.
Maintenance and management of drainage system
The drainage system should be inspected and maintained regularly to maintain good water conservancy functions and structural conditions.
Check whether the cover plate screws are loose and whether the cover plate is damaged.
Open the inspection port, clean the filth blue in the collection well, and check whether the water outlet is unblocked.
Clean the garbage in the drainage ditch and check whether the drainage ditch has any gambling, deformation, subsidence, fracture, disconnection, etc.
Clean the drainage ditch. If there is sludge in the ditch, use a high-pressure water gun to flush, discharge the sludge in the upstream drainage ditch into the downstream inspection well, and then transport it away with a suction truck.
Repair all damaged parts and check at least twice a year to keep the waterways unblocked.
The composite drainage ditch cover all eases the burden of maintenance and construction. The supporting surfaces on both sides of the installed ditch should be kept flat and tightly connected, so that the tilting phenomenon will not be revealed during installation.
At the same time, the base of the drainage ditch cover plate should be stable, and the groove surfaces on both sides should be smooth and stable. The second is to note that the size must be measured on site, and the construction must be carried out according to the standard size of the drawing. Construction personnel are not allowed to modify the size privately during the construction process, otherwise it is easy to cause accidents. Finally, pay attention. According to the actual size of the drain to be installed, the drain cover is predetermined. When installing, there should be a certain gap between the drain cover plates.
