In the urban drainage system, the municipal pipe box culvert plays an important role. However, with the passage of time, the box culvert may have problems such as silt accumulation and poor water flow, and dredging treatment may be required. In this paper, we will introduce the process flow and precautions of dredging of municipal pipeline box culvert by using frogman underwater installation of airbags.
First, the process flow.
1.Site surveys.
Before carrying out the dredging work, it is necessary to investigate the site to understand the location, length, shape, depth and other conditions of the box culvert, and at the same time determine the size, quantity, and installation location of the airbags.
2.Prepare the equipment.
According to the results of the on-site investigation, prepare the corresponding equipment, including frogman equipment, airbags, inflatable equipment, pumping equipment, etc.
3.Frogman is underwater with airbags.
Send the frogman to the bottom of the box culvert, install the airbag inside the box culvert, and adjust the position and number of airbags according to the actual situation.
4.Inflating and pumping.
The airbag is inflated and the pumping equipment is activated at the same time to pump out the silt and water inside the box culvert. Adjust the speed and flow rate of inflation and pumping according to the actual situation.
5.Dredging completion and acceptance.
When the silt and water inside the box culvert are all cleaned up, the box culvert is inspected to ensure that there are no residues and obstacles, and the cleaning effect is checked and accepted.
2. Precautions.
1.Before carrying out dredging work, it is necessary to fully inspect and prepare equipment and personnel to ensure the safety and reliability of equipment and personnel.
2.When installing airbags, it is necessary to pay attention to the size and number of airbags to match the size and shape of the box culvert, and at the same time to ensure that the installation position of the airbags is correct.
3.In the process of aeration and pumping, it is necessary to pay attention to controlling the speed and flow of inflation and pumping to avoid adverse effects on the box culvert and the surrounding environment.
4.When carrying out dredging work, it is necessary to pay attention to personnel safety and environmental protection, and take corresponding measures to ensure that there are no problems such as personnel and environmental pollution in the process of work.
5.During acceptance, it is necessary to pay attention to check the cleaning effect and the status of the box culvert, and if there is a problem, it needs to be dealt with and repaired in time.
In short, the dredging of municipal pipeline box culvert is an important maintenance work of urban drainage system, and the method of installing air bags underwater by frogman can achieve good results. When carrying out dredging work, it is necessary to pay attention to the implementation of technological processes and precautions to ensure the quality and safety of the work. At the same time, it is necessary to take corresponding measures for different situations to improve work efficiency and environmental protection.